Merge pull request 'release v1.5.1: support-relay card + topic-reopen fixes' (#133) from development into master

Telegram silently routes a copyMessage aimed at a deleted forum topic
into the chat's General topic with NO error, so the bot's error-based
recreate never fired — the user's next message landed in General with no
card. Confirmed against the prod bot logs: a relay after a topic deletion
logged neither "relay to topic failed" nor "topic gone, reopening".

Probe topic liveness before reusing it: re-applying the info card's reply
markup is a no-op that errors only when the card (hence the topic) is
gone, so the bot detects the deletion and reopens the topic + card rather
than relying on the (absent) copy error. The post-copy recreate stays as
a race backstop.

.gitea/workflows/ci.yaml

@@ -26,6 +26,13 @@ on:
   push:
     branches: [development]
 
+# The dictionary release the test suite validates against — the current
+# scrabble-dictionary release. Centralised here so a release bump is one edit; the
+# unit/integration jobs inherit it. The deploy job overrides it per contour with
+# vars.TEST_DICT_VERSION (the seed for a fresh volume), see deploy/README.md.
+env:
+  DICT_VERSION: v1.3.0
+
 jobs:
   # changes detects which areas a PR/push touched, so the test jobs can skip when
   # irrelevant. It defaults to running everything when the diff cannot be computed.
@@ -86,7 +93,6 @@ jobs:
       # The engine consumes the published scrabble-solver module from this Gitea;
       # GOPRIVATE makes go fetch it directly (skipping the public proxy/checksum DB).
       GOPRIVATE: gitea.iliadenisov.ru/*
-      DICT_VERSION: v1.0.0
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -134,7 +140,6 @@ jobs:
       # suite's TestMain terminates its own container, so disable it.
       TESTCONTAINERS_RYUK_DISABLED: "true"
       GOPRIVATE: gitea.iliadenisov.ru/*
-      DICT_VERSION: v1.0.0
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -254,23 +259,25 @@ jobs:
           AWG_CONF: ${{ secrets.TEST_AWG_CONF }}
           GM_BASICAUTH_HASH: ${{ secrets.TEST_GM_BASICAUTH_HASH }}
           GRAFANA_ADMIN_PASSWORD: ${{ secrets.TEST_GRAFANA_ADMIN_PASSWORD }}
-          TELEGRAM_BOT_TOKEN_EN: ${{ secrets.TEST_TELEGRAM_BOT_TOKEN_EN }}
-          TELEGRAM_BOT_TOKEN_RU: ${{ secrets.TEST_TELEGRAM_BOT_TOKEN_RU }}
+          TELEGRAM_BOT_TOKEN: ${{ secrets.TEST_TELEGRAM_BOT_TOKEN }}
+          TELEGRAM_PROMO_BOT_TOKEN: ${{ secrets.TEST_TELEGRAM_PROMO_BOT_TOKEN }}
           GM_BASICAUTH_USER: ${{ vars.TEST_GM_BASICAUTH_USER }}
           GRAFANA_ROOT_URL: ${{ vars.TEST_GRAFANA_ROOT_URL }}
           CADDY_SITE_ADDRESS: ${{ vars.TEST_CADDY_SITE_ADDRESS }}
           TELEGRAM_MINIAPP_URL: ${{ vars.TEST_TELEGRAM_MINIAPP_URL }}
-          TELEGRAM_GAME_CHANNEL_ID_EN: ${{ vars.TEST_TELEGRAM_GAME_CHANNEL_ID_EN }}
-          TELEGRAM_GAME_CHANNEL_ID_RU: ${{ vars.TEST_TELEGRAM_GAME_CHANNEL_ID_RU }}
+          TELEGRAM_GAME_CHANNEL_ID: ${{ vars.TEST_TELEGRAM_GAME_CHANNEL_ID }}
+          TELEGRAM_CHAT_ID: ${{ vars.TEST_TELEGRAM_CHAT_ID }}
+          TELEGRAM_SUPPORT_CHAT_ID: ${{ vars.TEST_TELEGRAM_SUPPORT_CHAT_ID }}
+          TELEGRAM_BOT_USERNAME: ${{ vars.TEST_TELEGRAM_BOT_USERNAME }}
+          # The promo button reuses the UI's Mini App link variable.
+          TELEGRAM_BOT_LINK: ${{ vars.TEST_VITE_TELEGRAM_LINK }}
           # The test contour always uses Telegram's test environment — pinned here,
           # not an operator variable. The prod workflow leaves it false.
           TELEGRAM_TEST_ENV: "true"
           VITE_TELEGRAM_BOT_ID: ${{ vars.TEST_VITE_TELEGRAM_BOT_ID }}
           VITE_TELEGRAM_LINK: ${{ vars.TEST_VITE_TELEGRAM_LINK }}
-          VITE_TELEGRAM_GAME_CHANNEL_NAME_EN: ${{ vars.TEST_VITE_TELEGRAM_GAME_CHANNEL_NAME_EN }}
-          VITE_TELEGRAM_GAME_CHANNEL_NAME_RU: ${{ vars.TEST_VITE_TELEGRAM_GAME_CHANNEL_NAME_RU }}
+          VITE_TELEGRAM_GAME_CHANNEL_NAME: ${{ vars.TEST_VITE_TELEGRAM_GAME_CHANNEL_NAME }}
           VITE_GATEWAY_URL: ${{ vars.TEST_VITE_GATEWAY_URL }}
-          GATEWAY_DEFAULT_SUPPORTED_LANGUAGES: ${{ vars.TEST_GATEWAY_DEFAULT_SUPPORTED_LANGUAGES }}
           # Unset vars render empty -> the compose ":-" defaults apply.
           POSTGRES_DB: ${{ vars.TEST_POSTGRES_DB }}
           POSTGRES_USER: ${{ vars.TEST_POSTGRES_USER }}
@@ -287,62 +294,82 @@ jobs:
           mkdir -p "$conf"
           cp -r caddy otelcol prometheus tempo grafana "$conf"/
           export SCRABBLE_CONFIG_DIR="$conf"
+          # Bot-link mTLS material for the test contour: a private CA + gateway/bot
+          # leaves (CN=gateway, the service name the bot dials). Prod supplies these
+          # from PROD_ secrets instead. Regenerated each deploy; both ends redeploy
+          # together so they always share the fresh CA (see deploy/gen-certs.sh).
+          bash "$GITHUB_WORKSPACE/deploy/gen-certs.sh" "$conf/certs"
           # App version for the About screen: the git tag if present, else the short SHA
           # (the test checkout is shallow/untagged, so this is the SHA here — fine).
           export APP_VERSION="$(git -C "$GITHUB_WORKSPACE" describe --tags --always 2>/dev/null || echo dev)"
-          docker compose --ansi never build --progress plain
-          docker compose --ansi never up -d --remove-orphans
+          # The telegram-local profile brings the bot + its VPN sidecar; prod runs the
+          # bot on its own host instead (deploy/docker-compose.bot.yml), and the prod
+          # main host omits both. Without the profile they would not start here.
+          docker compose --ansi never --profile telegram-local build --progress plain
+          docker compose --ansi never --profile telegram-local up -d --remove-orphans
           # The config-only services bind-mount the reseeded config dir. A plain `up -d`
           # leaves them on the previous bind mount (the dir was rm'd + recreated), so a
           # changed Caddyfile or Grafana dashboard is ignored — force-recreate them to
           # pick up the fresh config.
           docker compose --ansi never up -d --force-recreate --no-deps caddy otelcol prometheus tempo grafana
 
-      - name: Probe the landing and the gateway through caddy
+      - name: Probe the landing, gateway and backend
         run: |
           set -u
-          # Two probes through the contour caddy: "/" is the static
-          # landing container, "/app/" is the gateway-served SPA shell.
+          # Three probes. "/" is the static landing container and "/app/" the
+          # gateway-served SPA shell (both through the contour caddy on the edge net).
+          # The backend /readyz is probed on the internal net as well: the caddy probes
+          # are blind to a crash-looping backend (the landing is static and the SPA
+          # shell is served without it), which let a bad deploy go green while the
+          # backend was down — so check it directly here.
           for i in $(seq 1 20); do
             if docker run --rm --network edge alpine:3.20 wget -q -T 5 -O /dev/null http://scrabble/ &&
-               docker run --rm --network edge alpine:3.20 wget -q -T 5 -O /dev/null http://scrabble/app/; then
-              echo "healthy: GET http://scrabble/ (landing) + /app/ (gateway)"
+               docker run --rm --network edge alpine:3.20 wget -q -T 5 -O /dev/null http://scrabble/app/ &&
+               docker run --rm --network scrabble-internal alpine:3.20 wget -q -T 5 -O /dev/null http://backend:8080/readyz; then
+              echo "healthy: GET / (landing) + /app/ (gateway) + backend /readyz"
               exit 0
             fi
             sleep 3
           done
-          echo "probe failed; recent landing + gateway logs:"
+          echo "probe failed; recent landing + gateway + backend logs:"
           docker logs --tail 50 scrabble-landing || true
           docker logs --tail 50 scrabble-gateway || true
+          docker logs --tail 50 scrabble-backend || true
           exit 1
 
-      - name: Probe the Telegram connector liveness
+      - name: Probe the Telegram validator and bot liveness
         run: |
           set -u
-          # The gateway probe cannot see a crash-looping connector (it long-polls and
-          # egresses through the VPN sidecar, with no public ingress). Inspect the
-          # container directly: it must be running, not restarting, with a stable
-          # restart count. A grace period lets the VPN handshake settle (the connector
-          # may restart a few times first).
+          # The gateway/backend probes cannot see a crash-looping validator or bot
+          # (the validator answers only internal gRPC; the bot long-polls + egresses
+          # through the VPN sidecar with no public ingress). Inspect the containers
+          # directly: each must be running, not restarting, with a stable restart
+          # count. A grace period lets the VPN handshake and the bot-link dial settle.
           sleep 20
-          for i in $(seq 1 20); do
-            status="$(docker inspect -f '{{.State.Status}}' scrabble-telegram 2>/dev/null || echo missing)"
-            restarting="$(docker inspect -f '{{.State.Restarting}}' scrabble-telegram 2>/dev/null || echo true)"
-            if [ "$status" = "running" ] && [ "$restarting" = "false" ]; then
-              c1="$(docker inspect -f '{{.RestartCount}}' scrabble-telegram)"
-              sleep 5
-              c2="$(docker inspect -f '{{.RestartCount}}' scrabble-telegram)"
-              if [ "$c1" = "$c2" ]; then
-                echo "connector healthy: status=$status restarts=$c2"
-                exit 0
+          for name in scrabble-telegram-validator scrabble-telegram-bot; do
+            ok=
+            for i in $(seq 1 20); do
+              status="$(docker inspect -f '{{.State.Status}}' "$name" 2>/dev/null || echo missing)"
+              restarting="$(docker inspect -f '{{.State.Restarting}}' "$name" 2>/dev/null || echo true)"
+              if [ "$status" = "running" ] && [ "$restarting" = "false" ]; then
+                c1="$(docker inspect -f '{{.RestartCount}}' "$name")"
+                sleep 5
+                c2="$(docker inspect -f '{{.RestartCount}}' "$name")"
+                if [ "$c1" = "$c2" ]; then
+                  echo "$name healthy: status=$status restarts=$c2"
+                  ok=1
+                  break
+                fi
+                echo "$name still restarting ($c1 -> $c2); waiting"
               fi
-              echo "connector still restarting ($c1 -> $c2); waiting"
+              sleep 3
+            done
+            if [ -z "$ok" ]; then
+              echo "$name not healthy; recent logs:"
+              docker logs --tail 80 "$name" || true
+              exit 1
             fi
-            sleep 3
           done
-          echo "connector not healthy; recent logs:"
-          docker logs --tail 80 scrabble-telegram || true
-          exit 1
 
       - name: Prune dangling images
         if: always()

.gitea/workflows/prod-deploy.yaml

@@ -0,0 +1,268 @@
+# Manual production rollout. Runs ONLY from master, ONLY on workflow_dispatch with
+# confirm=deploy (development->master is merged + green first; this is the separate,
+# deliberate prod step). Visible sequential jobs from most to least significant:
+#   build -> deploy-main -> deploy-bot -> verify
+# The per-service rolling (postgres->backend->gateway->landing->validator->caddy),
+# health-gating and auto-rollback live in deploy/prod-deploy.sh on the main host and
+# show in the deploy-main log. Manual post-deploy rollback is prod-rollback.yaml.
+# See deploy/README.md (prod runbook).
+name: prod-deploy
+run-name: "prod deploy ${{ github.sha }}"
+
+on:
+  workflow_dispatch:
+    inputs:
+      confirm:
+        description: 'Type "deploy" to confirm a production rollout from master.'
+        required: true
+        default: ""
+
+permissions:
+  contents: read
+
+env:
+  NO_COLOR: "1"
+  DOCKER_CLI_HINTS: "false"
+  REGISTRY: docker.iliadenisov.ru/developer
+
+jobs:
+  build:
+    if: ${{ github.ref == 'refs/heads/master' && inputs.confirm == 'deploy' }}
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+    outputs:
+      tag: ${{ steps.ver.outputs.tag }}
+    env:
+      PROD_REGISTRY_USER: ${{ vars.PROD_REGISTRY_USER }}
+      PROD_REGISTRY_PASSWORD: ${{ secrets.PROD_REGISTRY_PASSWORD }}
+      VITE_TELEGRAM_BOT_ID: ${{ vars.PROD_VITE_TELEGRAM_BOT_ID }}
+      VITE_TELEGRAM_LINK: ${{ vars.PROD_VITE_TELEGRAM_LINK }}
+      VITE_TELEGRAM_GAME_CHANNEL_NAME: ${{ vars.PROD_VITE_TELEGRAM_GAME_CHANNEL_NAME }}
+      VITE_GATEWAY_URL: ${{ vars.PROD_VITE_GATEWAY_URL }}
+      POSTGRES_PASSWORD: ${{ secrets.PROD_POSTGRES_PASSWORD }}
+      GM_BASICAUTH_HASH: ${{ secrets.PROD_GM_BASICAUTH_HASH }}
+      TELEGRAM_MINIAPP_URL: ${{ vars.PROD_TELEGRAM_MINIAPP_URL }}
+      DICT_VERSION: ${{ vars.PROD_DICT_VERSION }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Compute version tag
+        id: ver
+        run: echo "tag=$(git describe --tags --always)" >> "$GITHUB_OUTPUT"
+      - name: Registry login
+        run: echo "$PROD_REGISTRY_PASSWORD" | docker login "${REGISTRY%%/*}" -u "$PROD_REGISTRY_USER" --password-stdin
+      - name: Build and push images
+        working-directory: deploy
+        run: |
+          export TAG="${{ steps.ver.outputs.tag }}" APP_VERSION="${{ steps.ver.outputs.tag }}" SCRABBLE_CONFIG_DIR=.
+          # The four main-stack images via compose (reuses the build args, incl. VERSION);
+          # the bot separately, since it is profiled out of the prod compose.
+          docker compose -f docker-compose.yml -f docker-compose.prod.yml build
+          docker compose -f docker-compose.yml -f docker-compose.prod.yml push backend gateway landing validator
+          docker build -f ../platform/telegram/Dockerfile --target bot --build-arg VERSION="$TAG" -t "$REGISTRY/scrabble-telegram-bot:$TAG" ..
+          docker push "$REGISTRY/scrabble-telegram-bot:$TAG"
+
+  deploy-main:
+    needs: build
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+    env:
+      TAG: ${{ needs.build.outputs.tag }}
+      PROD_REGISTRY_USER: ${{ vars.PROD_REGISTRY_USER }}
+      PROD_REGISTRY_PASSWORD: ${{ secrets.PROD_REGISTRY_PASSWORD }}
+      PROD_SSH_KEY: ${{ secrets.PROD_SSH_KEY }}
+      PROD_SSH_KNOWN_HOSTS: ${{ secrets.PROD_SSH_KNOWN_HOSTS }}
+      MAIN_HOST: ${{ vars.PROD_MAIN_HOST }}
+      POSTGRES_PASSWORD: ${{ secrets.PROD_POSTGRES_PASSWORD }}
+      GM_BASICAUTH_HASH: ${{ secrets.PROD_GM_BASICAUTH_HASH }}
+      GRAFANA_ADMIN_PASSWORD: ${{ secrets.PROD_GRAFANA_ADMIN_PASSWORD }}
+      TELEGRAM_BOT_TOKEN: ${{ secrets.PROD_TELEGRAM_BOT_TOKEN }}
+      PROD_BOTLINK_CA: ${{ secrets.PROD_BOTLINK_CA }}
+      PROD_BOTLINK_GATEWAY_CERT: ${{ secrets.PROD_BOTLINK_GATEWAY_CERT }}
+      PROD_BOTLINK_GATEWAY_KEY: ${{ secrets.PROD_BOTLINK_GATEWAY_KEY }}
+      GM_BASICAUTH_USER: ${{ vars.PROD_GM_BASICAUTH_USER }}
+      GRAFANA_ROOT_URL: ${{ vars.PROD_GRAFANA_ROOT_URL }}
+      CADDY_SITE_ADDRESS: ${{ vars.PROD_CADDY_SITE_ADDRESS }}
+      LOG_LEVEL: ${{ vars.PROD_LOG_LEVEL }}
+      DICT_VERSION: ${{ vars.PROD_DICT_VERSION }}
+      POSTGRES_DB: ${{ vars.PROD_POSTGRES_DB }}
+      POSTGRES_USER: ${{ vars.PROD_POSTGRES_USER }}
+      TELEGRAM_MINIAPP_URL: ${{ vars.PROD_TELEGRAM_MINIAPP_URL }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Set up SSH
+        run: |
+          mkdir -p ~/.ssh && chmod 700 ~/.ssh
+          printf '%s\n' "$PROD_SSH_KEY" > ~/.ssh/id_deploy && chmod 600 ~/.ssh/id_deploy
+          printf '%s\n' "$PROD_SSH_KNOWN_HOSTS" > ~/.ssh/known_hosts
+      - name: Determine previous tag and migration
+        run: |
+          ssh_main() { ssh -i ~/.ssh/id_deploy -o BatchMode=yes "deploy@$MAIN_HOST" "$@"; }
+          PREV_TAG="$(ssh_main 'cat /opt/scrabble/DEPLOYED_TAG 2>/dev/null || echo none')"
+          MIGRATION=0
+          if [ "$PREV_TAG" != none ]; then
+            if ! git cat-file -e "$PREV_TAG^{commit}" 2>/dev/null; then
+              MIGRATION=1
+            elif git diff --name-only "$PREV_TAG..$TAG" -- backend/internal/postgres/migrations/ | grep -q .; then
+              MIGRATION=1
+            fi
+          fi
+          { echo "PREV_TAG=$PREV_TAG"; echo "MIGRATION=$MIGRATION"; } >> "$GITHUB_ENV"
+          echo "prev=$PREV_TAG migration=$MIGRATION"
+      - name: Render main env + certs
+        run: |
+          umask 077
+          mkdir -p stage/certs-main
+          cat > stage/env.sh <<EOF
+          export REGISTRY='$REGISTRY'
+          export SCRABBLE_CONFIG_DIR='/opt/scrabble'
+          export POSTGRES_DB='${POSTGRES_DB:-scrabble}'
+          export POSTGRES_USER='${POSTGRES_USER:-scrabble}'
+          export POSTGRES_PASSWORD='$POSTGRES_PASSWORD'
+          export GM_BASICAUTH_USER='${GM_BASICAUTH_USER:-gm}'
+          export GM_BASICAUTH_HASH='$GM_BASICAUTH_HASH'
+          export GRAFANA_ADMIN_PASSWORD='$GRAFANA_ADMIN_PASSWORD'
+          export GRAFANA_ROOT_URL='$GRAFANA_ROOT_URL'
+          export CADDY_SITE_ADDRESS='$CADDY_SITE_ADDRESS'
+          export LOG_LEVEL='${LOG_LEVEL:-info}'
+          export DICT_VERSION='$DICT_VERSION'
+          export APP_VERSION='$TAG'
+          export TELEGRAM_BOT_TOKEN='$TELEGRAM_BOT_TOKEN'
+          export TELEGRAM_MINIAPP_URL='$TELEGRAM_MINIAPP_URL'
+          export GATEWAY_ABUSE_BAN_ENABLED='true'
+          EOF
+          printf '%s\n' "$PROD_BOTLINK_CA"           > stage/certs-main/ca.crt
+          printf '%s\n' "$PROD_BOTLINK_GATEWAY_CERT" > stage/certs-main/gateway.crt
+          printf '%s\n' "$PROD_BOTLINK_GATEWAY_KEY"  > stage/certs-main/gateway.key
+          chmod 644 stage/certs-main/*
+      - name: Deploy the main host
+        run: |
+          ssh_main() { ssh -i ~/.ssh/id_deploy -o BatchMode=yes "deploy@$MAIN_HOST" "$@"; }
+          ssh_main 'mkdir -p /opt/scrabble/compose'
+          tar -C deploy -czf - docker-compose.yml docker-compose.prod.yml prod-deploy.sh \
+            | ssh_main 'tar -C /opt/scrabble/compose -xzf -'
+          tar -C deploy -czf - caddy otelcol prometheus tempo grafana \
+            | ssh_main 'tar -C /opt/scrabble -xzf -'
+          tar -C stage -czf - certs-main \
+            | ssh_main 'rm -rf /opt/scrabble/certs && mkdir -p /opt/scrabble/certs && tar -C /opt/scrabble/certs --strip-components=1 -xzf -'
+          scp -i ~/.ssh/id_deploy -o BatchMode=yes stage/env.sh "deploy@$MAIN_HOST:/opt/scrabble/env.sh"
+          echo "$PROD_REGISTRY_PASSWORD" | ssh_main "docker login ${REGISTRY%%/*} -u $PROD_REGISTRY_USER --password-stdin"
+          ssh_main "TAG='$TAG' PREV_TAG='$PREV_TAG' MIGRATION='$MIGRATION' bash /opt/scrabble/compose/prod-deploy.sh"
+
+  deploy-bot:
+    needs: [build, deploy-main]
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+    env:
+      TAG: ${{ needs.build.outputs.tag }}
+      PROD_REGISTRY_USER: ${{ vars.PROD_REGISTRY_USER }}
+      PROD_REGISTRY_PASSWORD: ${{ secrets.PROD_REGISTRY_PASSWORD }}
+      PROD_SSH_KEY: ${{ secrets.PROD_SSH_KEY }}
+      PROD_SSH_KNOWN_HOSTS: ${{ secrets.PROD_SSH_KNOWN_HOSTS }}
+      TG_HOST: ${{ vars.PROD_TG_HOST }}
+      MAIN_HOST: ${{ vars.PROD_MAIN_HOST }}
+      TELEGRAM_BOT_TOKEN: ${{ secrets.PROD_TELEGRAM_BOT_TOKEN }}
+      TELEGRAM_PROMO_BOT_TOKEN: ${{ secrets.PROD_TELEGRAM_PROMO_BOT_TOKEN }}
+      PROD_BOTLINK_CA: ${{ secrets.PROD_BOTLINK_CA }}
+      PROD_BOTLINK_BOT_CERT: ${{ secrets.PROD_BOTLINK_BOT_CERT }}
+      PROD_BOTLINK_BOT_KEY: ${{ secrets.PROD_BOTLINK_BOT_KEY }}
+      LOG_LEVEL: ${{ vars.PROD_LOG_LEVEL }}
+      TELEGRAM_MINIAPP_URL: ${{ vars.PROD_TELEGRAM_MINIAPP_URL }}
+      TELEGRAM_GAME_CHANNEL_ID: ${{ vars.PROD_TELEGRAM_GAME_CHANNEL_ID }}
+      TELEGRAM_CHAT_ID: ${{ vars.PROD_TELEGRAM_CHAT_ID }}
+      TELEGRAM_SUPPORT_CHAT_ID: ${{ vars.PROD_TELEGRAM_SUPPORT_CHAT_ID }}
+      TELEGRAM_BOT_USERNAME: ${{ vars.PROD_TELEGRAM_BOT_USERNAME }}
+      TELEGRAM_BOT_LINK: ${{ vars.PROD_VITE_TELEGRAM_LINK }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up SSH
+        run: |
+          mkdir -p ~/.ssh && chmod 700 ~/.ssh
+          printf '%s\n' "$PROD_SSH_KEY" > ~/.ssh/id_deploy && chmod 600 ~/.ssh/id_deploy
+          printf '%s\n' "$PROD_SSH_KNOWN_HOSTS" > ~/.ssh/known_hosts
+      - name: Render bot env + certs
+        run: |
+          umask 077
+          mkdir -p stage/certs-bot
+          cat > stage/env.bot.sh <<EOF
+          export SCRABBLE_CONFIG_DIR='/opt/scrabble'
+          export BOT_IMAGE='$REGISTRY/scrabble-telegram-bot:$TAG'
+          export BOTLINK_GATEWAY_ADDR='$MAIN_HOST:9443'
+          export TELEGRAM_BOT_TOKEN='$TELEGRAM_BOT_TOKEN'
+          export TELEGRAM_MINIAPP_URL='$TELEGRAM_MINIAPP_URL'
+          export TELEGRAM_GAME_CHANNEL_ID='$TELEGRAM_GAME_CHANNEL_ID'
+          export TELEGRAM_CHAT_ID='$TELEGRAM_CHAT_ID'
+          export TELEGRAM_SUPPORT_CHAT_ID='$TELEGRAM_SUPPORT_CHAT_ID'
+          export TELEGRAM_PROMO_BOT_TOKEN='$TELEGRAM_PROMO_BOT_TOKEN'
+          export TELEGRAM_BOT_USERNAME='$TELEGRAM_BOT_USERNAME'
+          export TELEGRAM_BOT_LINK='$TELEGRAM_BOT_LINK'
+          export LOG_LEVEL='${LOG_LEVEL:-info}'
+          EOF
+          printf '%s\n' "$PROD_BOTLINK_CA"       > stage/certs-bot/ca.crt
+          printf '%s\n' "$PROD_BOTLINK_BOT_CERT" > stage/certs-bot/bot.crt
+          printf '%s\n' "$PROD_BOTLINK_BOT_KEY"  > stage/certs-bot/bot.key
+          chmod 644 stage/certs-bot/*
+      - name: Deploy the bot host
+        run: |
+          ssh_tg() { ssh -i ~/.ssh/id_deploy -o BatchMode=yes "deploy@$TG_HOST" "$@"; }
+          ssh_tg 'mkdir -p /opt/scrabble/compose'
+          tar -C deploy -czf - docker-compose.bot.yml | ssh_tg 'tar -C /opt/scrabble/compose -xzf -'
+          tar -C stage -czf - certs-bot \
+            | ssh_tg 'rm -rf /opt/scrabble/certs && mkdir -p /opt/scrabble/certs && tar -C /opt/scrabble/certs --strip-components=1 -xzf -'
+          scp -i ~/.ssh/id_deploy -o BatchMode=yes stage/env.bot.sh "deploy@$TG_HOST:/opt/scrabble/env.bot.sh"
+          echo "$PROD_REGISTRY_PASSWORD" | ssh_tg "docker login ${REGISTRY%%/*} -u $PROD_REGISTRY_USER --password-stdin"
+          ssh_tg 'set -a; . /opt/scrabble/env.bot.sh; set +a; cd /opt/scrabble/compose;
+            docker compose -f docker-compose.bot.yml pull;
+            docker compose -f docker-compose.bot.yml up -d'
+          ssh_tg 'for i in $(seq 1 20); do
+              s=$(docker inspect -f "{{.State.Status}}" scrabble-telegram-bot 2>/dev/null || echo missing)
+              r=$(docker inspect -f "{{.State.Restarting}}" scrabble-telegram-bot 2>/dev/null || echo true)
+              if [ "$s" = running ] && [ "$r" = false ]; then
+                c1=$(docker inspect -f "{{.RestartCount}}" scrabble-telegram-bot); sleep 5
+                c2=$(docker inspect -f "{{.RestartCount}}" scrabble-telegram-bot)
+                [ "$c1" = "$c2" ] && { echo "bot healthy"; exit 0; }
+              fi
+              sleep 3
+            done
+            echo "bot not healthy:"; docker logs --tail 80 scrabble-telegram-bot; exit 1'
+
+  verify:
+    needs: [deploy-main, deploy-bot]
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+    env:
+      PROD_SSH_KEY: ${{ secrets.PROD_SSH_KEY }}
+      PROD_SSH_KNOWN_HOSTS: ${{ secrets.PROD_SSH_KNOWN_HOSTS }}
+      MAIN_HOST: ${{ vars.PROD_MAIN_HOST }}
+      CADDY_SITE_ADDRESS: ${{ vars.PROD_CADDY_SITE_ADDRESS }}
+    steps:
+      - name: Set up SSH
+        run: |
+          mkdir -p ~/.ssh && chmod 700 ~/.ssh
+          printf '%s\n' "$PROD_SSH_KEY" > ~/.ssh/id_deploy && chmod 600 ~/.ssh/id_deploy
+          printf '%s\n' "$PROD_SSH_KNOWN_HOSTS" > ~/.ssh/known_hosts
+      - name: Verify the public site
+        run: |
+          domain="${CADDY_SITE_ADDRESS%% *}"
+          ssh -i ~/.ssh/id_deploy -o BatchMode=yes "deploy@$MAIN_HOST" "for i in \$(seq 1 20); do
+              if curl -fsS -k --resolve $domain:443:127.0.0.1 https://$domain/ -o /dev/null &&
+                 curl -fsS -k --resolve $domain:443:127.0.0.1 https://$domain/app/ -o /dev/null &&
+                 docker run --rm --network scrabble-internal alpine:3.20 wget -q -T 5 -O /dev/null http://backend:8080/readyz; then
+                echo 'public site + /app/ + backend healthy'; exit 0
+              fi
+              sleep 5
+            done
+            echo 'public verify failed; recent caddy + gateway + backend logs:'
+            docker logs --tail 40 scrabble-caddy; docker logs --tail 40 scrabble-gateway; docker logs --tail 40 scrabble-backend
+            exit 1"

.gitea/workflows/prod-rollback.yaml

@@ -0,0 +1,223 @@
+# Manual production rollback. Runs ONLY from master, ONLY on workflow_dispatch with
+# confirm=rollback. Re-deploys an already-published image tag (no build): leave
+# target_version blank to roll back to the previously deployed version (read from the
+# main host), or set it to a specific release tag from the Releases page. The
+# re-deploy is the same rolling, health-gated path as prod-deploy (TAG=target,
+# MIGRATION=0 — rollback is image-only and never migrates the DB; image rollback is
+# DB-safe under the expand-contract rule). See deploy/README.md (prod runbook).
+name: prod-rollback
+run-name: "prod rollback ${{ inputs.target_version || 'previous' }}"
+
+on:
+  workflow_dispatch:
+    inputs:
+      confirm:
+        description: 'Type "rollback" to confirm a production rollback.'
+        required: true
+        default: ""
+      target_version:
+        description: "Release tag to roll back to (blank = the previous deployed version)."
+        required: false
+        default: ""
+
+permissions:
+  contents: read
+
+env:
+  NO_COLOR: "1"
+  DOCKER_CLI_HINTS: "false"
+  REGISTRY: docker.iliadenisov.ru/developer
+
+jobs:
+  rollback-main:
+    if: ${{ github.ref == 'refs/heads/master' && inputs.confirm == 'rollback' }}
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+    outputs:
+      target: ${{ steps.resolve.outputs.target }}
+    env:
+      PROD_REGISTRY_USER: ${{ vars.PROD_REGISTRY_USER }}
+      PROD_REGISTRY_PASSWORD: ${{ secrets.PROD_REGISTRY_PASSWORD }}
+      PROD_SSH_KEY: ${{ secrets.PROD_SSH_KEY }}
+      PROD_SSH_KNOWN_HOSTS: ${{ secrets.PROD_SSH_KNOWN_HOSTS }}
+      MAIN_HOST: ${{ vars.PROD_MAIN_HOST }}
+      POSTGRES_PASSWORD: ${{ secrets.PROD_POSTGRES_PASSWORD }}
+      GM_BASICAUTH_HASH: ${{ secrets.PROD_GM_BASICAUTH_HASH }}
+      GRAFANA_ADMIN_PASSWORD: ${{ secrets.PROD_GRAFANA_ADMIN_PASSWORD }}
+      TELEGRAM_BOT_TOKEN: ${{ secrets.PROD_TELEGRAM_BOT_TOKEN }}
+      PROD_BOTLINK_CA: ${{ secrets.PROD_BOTLINK_CA }}
+      PROD_BOTLINK_GATEWAY_CERT: ${{ secrets.PROD_BOTLINK_GATEWAY_CERT }}
+      PROD_BOTLINK_GATEWAY_KEY: ${{ secrets.PROD_BOTLINK_GATEWAY_KEY }}
+      GM_BASICAUTH_USER: ${{ vars.PROD_GM_BASICAUTH_USER }}
+      GRAFANA_ROOT_URL: ${{ vars.PROD_GRAFANA_ROOT_URL }}
+      CADDY_SITE_ADDRESS: ${{ vars.PROD_CADDY_SITE_ADDRESS }}
+      LOG_LEVEL: ${{ vars.PROD_LOG_LEVEL }}
+      DICT_VERSION: ${{ vars.PROD_DICT_VERSION }}
+      POSTGRES_DB: ${{ vars.PROD_POSTGRES_DB }}
+      POSTGRES_USER: ${{ vars.PROD_POSTGRES_USER }}
+      TELEGRAM_MINIAPP_URL: ${{ vars.PROD_TELEGRAM_MINIAPP_URL }}
+      INPUT_TARGET: ${{ inputs.target_version }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up SSH
+        run: |
+          mkdir -p ~/.ssh && chmod 700 ~/.ssh
+          printf '%s\n' "$PROD_SSH_KEY" > ~/.ssh/id_deploy && chmod 600 ~/.ssh/id_deploy
+          printf '%s\n' "$PROD_SSH_KNOWN_HOSTS" > ~/.ssh/known_hosts
+      - name: Resolve rollback target
+        id: resolve
+        run: |
+          ssh_main() { ssh -i ~/.ssh/id_deploy -o BatchMode=yes "deploy@$MAIN_HOST" "$@"; }
+          CURRENT="$(ssh_main 'cat /opt/scrabble/DEPLOYED_TAG 2>/dev/null || echo none')"
+          if [ -n "$INPUT_TARGET" ]; then
+            TARGET="$INPUT_TARGET"
+          else
+            TARGET="$(ssh_main 'cat /opt/scrabble/PREVIOUS_TAG 2>/dev/null || echo none')"
+          fi
+          if [ -z "$TARGET" ] || [ "$TARGET" = none ]; then
+            echo "no rollback target (no PREVIOUS_TAG on the host and no target_version input)"; exit 1
+          fi
+          if [ "$TARGET" = "$CURRENT" ]; then
+            echo "target $TARGET is already the deployed version; nothing to do"; exit 1
+          fi
+          echo "rolling back: current=$CURRENT -> target=$TARGET"
+          echo "target=$TARGET" >> "$GITHUB_OUTPUT"
+          { echo "TARGET=$TARGET"; echo "CURRENT=$CURRENT"; } >> "$GITHUB_ENV"
+      - name: Render main env + certs
+        run: |
+          umask 077
+          mkdir -p stage/certs-main
+          cat > stage/env.sh <<EOF
+          export REGISTRY='$REGISTRY'
+          export SCRABBLE_CONFIG_DIR='/opt/scrabble'
+          export POSTGRES_DB='${POSTGRES_DB:-scrabble}'
+          export POSTGRES_USER='${POSTGRES_USER:-scrabble}'
+          export POSTGRES_PASSWORD='$POSTGRES_PASSWORD'
+          export GM_BASICAUTH_USER='${GM_BASICAUTH_USER:-gm}'
+          export GM_BASICAUTH_HASH='$GM_BASICAUTH_HASH'
+          export GRAFANA_ADMIN_PASSWORD='$GRAFANA_ADMIN_PASSWORD'
+          export GRAFANA_ROOT_URL='$GRAFANA_ROOT_URL'
+          export CADDY_SITE_ADDRESS='$CADDY_SITE_ADDRESS'
+          export LOG_LEVEL='${LOG_LEVEL:-info}'
+          export DICT_VERSION='$DICT_VERSION'
+          export APP_VERSION='$TARGET'
+          export TELEGRAM_BOT_TOKEN='$TELEGRAM_BOT_TOKEN'
+          export TELEGRAM_MINIAPP_URL='$TELEGRAM_MINIAPP_URL'
+          export GATEWAY_ABUSE_BAN_ENABLED='true'
+          EOF
+          printf '%s\n' "$PROD_BOTLINK_CA"           > stage/certs-main/ca.crt
+          printf '%s\n' "$PROD_BOTLINK_GATEWAY_CERT" > stage/certs-main/gateway.crt
+          printf '%s\n' "$PROD_BOTLINK_GATEWAY_KEY"  > stage/certs-main/gateway.key
+          chmod 644 stage/certs-main/*
+      - name: Roll the main host back
+        run: |
+          ssh_main() { ssh -i ~/.ssh/id_deploy -o BatchMode=yes "deploy@$MAIN_HOST" "$@"; }
+          ssh_main 'mkdir -p /opt/scrabble/compose'
+          tar -C deploy -czf - docker-compose.yml docker-compose.prod.yml prod-deploy.sh \
+            | ssh_main 'tar -C /opt/scrabble/compose -xzf -'
+          tar -C deploy -czf - caddy otelcol prometheus tempo grafana \
+            | ssh_main 'tar -C /opt/scrabble -xzf -'
+          tar -C stage -czf - certs-main \
+            | ssh_main 'rm -rf /opt/scrabble/certs && mkdir -p /opt/scrabble/certs && tar -C /opt/scrabble/certs --strip-components=1 -xzf -'
+          scp -i ~/.ssh/id_deploy -o BatchMode=yes stage/env.sh "deploy@$MAIN_HOST:/opt/scrabble/env.sh"
+          echo "$PROD_REGISTRY_PASSWORD" | ssh_main "docker login ${REGISTRY%%/*} -u $PROD_REGISTRY_USER --password-stdin"
+          # Image-only rollback: no migration window (TAG=target, MIGRATION=0). A failed
+          # rollback's auto-revert returns to the current version (PREV_TAG=$CURRENT).
+          ssh_main "TAG='$TARGET' PREV_TAG='$CURRENT' MIGRATION=0 bash /opt/scrabble/compose/prod-deploy.sh"
+
+  rollback-bot:
+    needs: rollback-main
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+    env:
+      TARGET: ${{ needs.rollback-main.outputs.target }}
+      PROD_REGISTRY_USER: ${{ vars.PROD_REGISTRY_USER }}
+      PROD_REGISTRY_PASSWORD: ${{ secrets.PROD_REGISTRY_PASSWORD }}
+      PROD_SSH_KEY: ${{ secrets.PROD_SSH_KEY }}
+      PROD_SSH_KNOWN_HOSTS: ${{ secrets.PROD_SSH_KNOWN_HOSTS }}
+      TG_HOST: ${{ vars.PROD_TG_HOST }}
+      MAIN_HOST: ${{ vars.PROD_MAIN_HOST }}
+      TELEGRAM_BOT_TOKEN: ${{ secrets.PROD_TELEGRAM_BOT_TOKEN }}
+      TELEGRAM_PROMO_BOT_TOKEN: ${{ secrets.PROD_TELEGRAM_PROMO_BOT_TOKEN }}
+      PROD_BOTLINK_CA: ${{ secrets.PROD_BOTLINK_CA }}
+      PROD_BOTLINK_BOT_CERT: ${{ secrets.PROD_BOTLINK_BOT_CERT }}
+      PROD_BOTLINK_BOT_KEY: ${{ secrets.PROD_BOTLINK_BOT_KEY }}
+      LOG_LEVEL: ${{ vars.PROD_LOG_LEVEL }}
+      TELEGRAM_MINIAPP_URL: ${{ vars.PROD_TELEGRAM_MINIAPP_URL }}
+      TELEGRAM_GAME_CHANNEL_ID: ${{ vars.PROD_TELEGRAM_GAME_CHANNEL_ID }}
+      TELEGRAM_CHAT_ID: ${{ vars.PROD_TELEGRAM_CHAT_ID }}
+      TELEGRAM_BOT_USERNAME: ${{ vars.PROD_TELEGRAM_BOT_USERNAME }}
+      TELEGRAM_BOT_LINK: ${{ vars.PROD_VITE_TELEGRAM_LINK }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Set up SSH
+        run: |
+          mkdir -p ~/.ssh && chmod 700 ~/.ssh
+          printf '%s\n' "$PROD_SSH_KEY" > ~/.ssh/id_deploy && chmod 600 ~/.ssh/id_deploy
+          printf '%s\n' "$PROD_SSH_KNOWN_HOSTS" > ~/.ssh/known_hosts
+      - name: Render bot env + certs
+        run: |
+          umask 077
+          mkdir -p stage/certs-bot
+          cat > stage/env.bot.sh <<EOF
+          export SCRABBLE_CONFIG_DIR='/opt/scrabble'
+          export BOT_IMAGE='$REGISTRY/scrabble-telegram-bot:$TARGET'
+          export BOTLINK_GATEWAY_ADDR='$MAIN_HOST:9443'
+          export TELEGRAM_BOT_TOKEN='$TELEGRAM_BOT_TOKEN'
+          export TELEGRAM_MINIAPP_URL='$TELEGRAM_MINIAPP_URL'
+          export TELEGRAM_GAME_CHANNEL_ID='$TELEGRAM_GAME_CHANNEL_ID'
+          export TELEGRAM_CHAT_ID='$TELEGRAM_CHAT_ID'
+          export TELEGRAM_PROMO_BOT_TOKEN='$TELEGRAM_PROMO_BOT_TOKEN'
+          export TELEGRAM_BOT_USERNAME='$TELEGRAM_BOT_USERNAME'
+          export TELEGRAM_BOT_LINK='$TELEGRAM_BOT_LINK'
+          export LOG_LEVEL='${LOG_LEVEL:-info}'
+          EOF
+          printf '%s\n' "$PROD_BOTLINK_CA"       > stage/certs-bot/ca.crt
+          printf '%s\n' "$PROD_BOTLINK_BOT_CERT" > stage/certs-bot/bot.crt
+          printf '%s\n' "$PROD_BOTLINK_BOT_KEY"  > stage/certs-bot/bot.key
+          chmod 644 stage/certs-bot/*
+      - name: Roll the bot host back
+        run: |
+          ssh_tg() { ssh -i ~/.ssh/id_deploy -o BatchMode=yes "deploy@$TG_HOST" "$@"; }
+          ssh_tg 'mkdir -p /opt/scrabble/compose'
+          tar -C deploy -czf - docker-compose.bot.yml | ssh_tg 'tar -C /opt/scrabble/compose -xzf -'
+          tar -C stage -czf - certs-bot \
+            | ssh_tg 'rm -rf /opt/scrabble/certs && mkdir -p /opt/scrabble/certs && tar -C /opt/scrabble/certs --strip-components=1 -xzf -'
+          scp -i ~/.ssh/id_deploy -o BatchMode=yes stage/env.bot.sh "deploy@$TG_HOST:/opt/scrabble/env.bot.sh"
+          echo "$PROD_REGISTRY_PASSWORD" | ssh_tg "docker login ${REGISTRY%%/*} -u $PROD_REGISTRY_USER --password-stdin"
+          ssh_tg 'set -a; . /opt/scrabble/env.bot.sh; set +a; cd /opt/scrabble/compose;
+            docker compose -f docker-compose.bot.yml pull;
+            docker compose -f docker-compose.bot.yml up -d'
+
+  verify:
+    needs: [rollback-main, rollback-bot]
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        shell: bash
+    env:
+      PROD_SSH_KEY: ${{ secrets.PROD_SSH_KEY }}
+      PROD_SSH_KNOWN_HOSTS: ${{ secrets.PROD_SSH_KNOWN_HOSTS }}
+      MAIN_HOST: ${{ vars.PROD_MAIN_HOST }}
+      CADDY_SITE_ADDRESS: ${{ vars.PROD_CADDY_SITE_ADDRESS }}
+    steps:
+      - name: Set up SSH
+        run: |
+          mkdir -p ~/.ssh && chmod 700 ~/.ssh
+          printf '%s\n' "$PROD_SSH_KEY" > ~/.ssh/id_deploy && chmod 600 ~/.ssh/id_deploy
+          printf '%s\n' "$PROD_SSH_KNOWN_HOSTS" > ~/.ssh/known_hosts
+      - name: Verify the public site
+        run: |
+          domain="${CADDY_SITE_ADDRESS%% *}"
+          ssh -i ~/.ssh/id_deploy -o BatchMode=yes "deploy@$MAIN_HOST" "for i in \$(seq 1 20); do
+              if curl -fsS -k --resolve $domain:443:127.0.0.1 https://$domain/ -o /dev/null &&
+                 docker run --rm --network scrabble-internal alpine:3.20 wget -q -T 5 -O /dev/null http://backend:8080/readyz; then
+                echo 'rolled-back site healthy'; exit 0
+              fi
+              sleep 5
+            done
+            echo 'verify failed'; docker logs --tail 40 scrabble-caddy; docker logs --tail 40 scrabble-backend; exit 1"

.gitignore

@@ -17,5 +17,9 @@
 **/.env.local
 **/.env.*.local
 
+# Bot-link mTLS material: private keys never belong in the repo. The test contour
+# generates them with deploy/gen-certs.sh; prod supplies them from PROD_ secrets.
+deploy/certs/
+
 # Claude Code harness runtime artifacts
 .claude/scheduled_tasks.lock

CLAUDE.md

@@ -1,96 +1,97 @@
 # scrabble-game — project guide
 
-Multiplatform Scrabble game. Read this first every session. The owner drives the
-project **one stage per session** (tariff constraint), so the repository — not
-conversation memory — is the source of continuity. Keep it that way.
+Multiplatform Scrabble game, **in production** at `https://erudit-game.ru`. Read this
+first every session. The repository — not conversation memory — is the source of
+continuity; keep it that way.
 
 ## Sources of truth (read before changing behaviour)
 
-- [`PLAN.md`](PLAN.md) — staged plan + **stage tracker** + per-stage *open
-  details to interview*.
-- [`PRERELEASE.md`](PRERELEASE.md) — pre-release hardening tracker (phases R1–R7
-  before Stage 18); same per-phase *interview + bake-back* discipline as `PLAN.md`.
-- [`docs/ARCHITECTURE.md`](docs/ARCHITECTURE.md) — architecture, transport,
-  security, the decision record. Always describes current state.
-- [`docs/FUNCTIONAL.md`](docs/FUNCTIONAL.md) (+ [`_ru`](docs/FUNCTIONAL_ru.md)
-  mirror) — per-domain user stories. English authoritative.
-- [`docs/TESTING.md`](docs/TESTING.md) — test layers + the per-stage CI gate.
+- [`docs/ARCHITECTURE.md`](docs/ARCHITECTURE.md) — architecture, transport, security,
+  the decision record. Always describes the current state.
+- [`docs/FUNCTIONAL.md`](docs/FUNCTIONAL.md) (+ [`_ru`](docs/FUNCTIONAL_ru.md) mirror)
+  — per-domain user stories. English authoritative.
+- [`docs/TESTING.md`](docs/TESTING.md) — test layers + the CI gate.
 - [`docs/UI_DESIGN.md`](docs/UI_DESIGN.md) — the `ui` visual/interaction design system.
+- [`deploy/README.md`](deploy/README.md) — the deploy contour + the production
+  rollout / rollback runbook.
 
-## Mandatory per-stage workflow
+## How we work
 
-**Start of a stage**
-1. Read `PLAN.md` (the stage's scope + *open details*) and the relevant `docs/`.
-2. Analyse what the stage actually requires against the current code.
-3. **Interview the owner** on every open detail and any fork not already fixed
-   in the plan — do not silently pick borderline decisions. Offer options with
-   brief pros/cons.
-4. Only then implement, strictly within the stage's scope.
-
-**End of a stage**
-1. Bake every new agreement back into `PLAN.md`, `docs/ARCHITECTURE.md`,
-   `docs/FUNCTIONAL.md` (+ `_ru`), the affected service `README`, and Go Doc
-   comments — in the **same** PR. Correct earlier stages' docs/code if a new
-   decision changes them.
-2. Update the stage tracker; add a line under *Refinements logged during
-   implementation* for any plan deviation.
-3. Get CI green, then mark the stage done.
-
-(The `stage-implementation` skill encodes this same loop and can be invoked.)
+- Inspect the relevant code path and the docs above before changing behaviour.
+- **Interview the owner on every fork** — do not silently pick borderline decisions;
+  offer options with brief pros/cons.
+- Smallest correct diff. Prefer compact code; reuse before adding; do not add deps,
+  seams or knobs until they are needed.
+- **Update or add tests for every functional change**, at the layers
+  `docs/TESTING.md` calls out.
+- **Bake docs in the same PR**: update `docs/ARCHITECTURE.md`, `docs/FUNCTIONAL.md`
+  (+`_ru`), the affected service `README` and Go Doc comments alongside the change.
+- Document added packages, types, funcs, consts and vars with Go Doc comments.
 
 ## Conventions
 
 - All code, comments, identifiers, commits, docs, filenames in **English**.
-- Chat with the owner follows the user-level `~/.claude/CLAUDE.md` (Russian,
-  the agreed persona and translation rules).
-- Mirror every point edit of `docs/FUNCTIONAL.md` into `docs/FUNCTIONAL_ru.md`
-  in the same patch (translate only the touched paragraphs).
-- Prefer compact code; do not add deps, seams or knobs until a stage needs them.
-  Reuse before adding. Document added packages/types/funcs with Go Doc comments.
-- Update or add tests for every functional change.
+- Chat with the owner follows the user-level `~/.claude/CLAUDE.md` (Russian, the
+  agreed persona and translation rules).
+- Mirror every point edit of `docs/FUNCTIONAL.md` into `docs/FUNCTIONAL_ru.md` in the
+  same patch (translate only the touched paragraphs).
 
-## Branching & CI
+## Branching, CI & production
 
-- **Two long-lived branches** (Stage 16 onward): **`development`** is the
-  integration branch; **`master`** is the production trunk. Cut `feature/*`
-  branches **from `development`** and PR them back into it. (Stages 0–15 used
-  `master` as the trunk with `feature/* → master`; the genesis Stage 0 commit is
-  on `master` by necessity.)
-- A commit to a `feature/*` branch triggers **nothing**. The single workflow
-  `.gitea/workflows/ci.yaml` runs the full suite (`unit` + `integration` + `ui`)
-  on a PR into `development` or `master`, and the gated **`deploy`** job auto-rolls
-  the **test contour** on a PR into — or a push to — `development`
-  (`docker compose up -d --build` on the runner host + a `GET /` probe). A PR into
-  `master` is test-only.
-- Merge `development → master` only when CI is green; the **prod** deploy is then a
-  **manual** workflow (Stage 18), never automatic. Secrets/variables are prefixed
-  `TEST_` / `PROD_` per contour (Gitea 1.26 has no deployment environments).
-- After any push, watch the run to green before declaring a stage done — use the
-  ready-made watcher, never an inline poll loop:
-  `python3 ~/.claude/bin/gitea-ci-watch.py` (background). It reads `$GITEA_URL`
-  / `$GITEA_TOKEN`; `gitea.iliadenisov.ru` is allow-listed in
-  `.claude/settings.json`. Remote: `origin git@gitea.iliadenisov.ru:developer/scrabble-game.git`.
+- **Two long-lived branches**: **`development`** is the integration branch; **`master`**
+  is the production trunk. Cut `feature/*` from `development` and PR back into it;
+  promote `development → master` via PR when ready to release. Both branches require
+  one approval + the `CI / gate` check.
+- A commit to a `feature/*` branch triggers nothing. The single workflow
+  `.gitea/workflows/ci.yaml` runs the full suite (`unit` + `integration` + `ui`) on a
+  PR into `development` or `master`, and the gated **`deploy`** job auto-rolls the
+  **test contour** on a PR into — or a push to — `development`
+  (`docker compose up -d --build` on the runner host + landing/SPA/backend probes). A
+  PR into `master` is test-only.
+- **Production is live on two hosts** (main + the Telegram bot host) and deploys
+  **only manually** (`workflow_dispatch`), never automatically:
+  - **`.gitea/workflows/prod-deploy.yaml`** (`confirm=deploy`, from `master`) builds +
+    pushes the images to the registry, then SSH-deploys both hosts — rolling per
+    service in dependency order, health-gated, **auto-rollback to the previous tag**;
+    a schema migration adds a maintenance window + a consistent `pg_dump`. Four visible
+    jobs: build → deploy-main → deploy-bot → verify.
+  - **`.gitea/workflows/prod-rollback.yaml`** (`confirm=rollback`) re-deploys a prior
+    release (blank `target_version` = the previous deployed version) — image-only,
+    rolling, health-gated.
+  - **Releases are git tags `vX.Y.Z` on `master`**; the deploy stamps `git describe
+    --tags` into the image tag, every binary (`pkg/version` via `-ldflags` → the
+    `service.version` telemetry attribute) and the SPA About screen. Tag the release
+    before deploying.
+  - Hosts are provisioned idempotently by **`deploy/ansible/`**. Per-contour
+    secrets/variables use the `TEST_` / `PROD_` prefix (Gitea 1.26 has no deployment
+    environments). Migrations must be **expand-contract** (backward-compatible) so
+    image rollback stays DB-safe. Full runbook + variable list in `deploy/README.md`.
+- After any push, merge or deploy, **watch the run to green** before declaring done —
+  use the ready-made watcher (run it in the background), never an inline poll loop:
+  `python3 ~/.claude/bin/gitea-ci-watch.py`. It reads `$GITEA_URL` / `$GITEA_TOKEN`;
+  `gitea.iliadenisov.ru` is allow-listed in `.claude/settings.json`. Remote:
+  `origin git@gitea.iliadenisov.ru:developer/scrabble-game.git`.
 
 ## Stack
 
-Go 1.26.3, `go.work` monorepo, module paths `scrabble/<name>`. Dependencies are
-added **when first used** (incremental): backend uses `gin` + `zap` +
-`pgx`/`go-jet`/`goose`/OTel (added in Stage 1). Client↔gateway is Connect-RPC +
-FlatBuffers (h2c); gateway↔backend is REST/JSON + `X-User-ID` plus a gRPC
-server-stream for live events. UI is pure HTML5/CSS on plain Svelte + Vite,
-packaged to native with Capacitor. Likely no Redis.
+Go 1.26.3, `go.work` monorepo, module paths `scrabble/<name>`. Backend uses `gin` +
+`zap` + `pgx`/`go-jet`/`goose`/OTel. Client↔gateway is Connect-RPC + FlatBuffers
+(h2c); gateway↔backend is REST/JSON + `X-User-ID` plus a gRPC server-stream for live
+events. UI is pure HTML5/CSS on plain Svelte + Vite, packaged to native with
+Capacitor. No Redis.
 
 ## Reused engine: `../scrabble-solver` (module `scrabble-solver`, Go 1.26.3)
 
-Embedded **in-process as a library** — there is no per-game container. Public
-API to reuse (do not reimplement):
+Embedded **in-process as a library** (`replace scrabble-solver => ../scrabble-solver`
+in `go.work`; CI checks out the sibling from
+`https://gitea.iliadenisov.ru/.../scrabble-solver.git`). There is no per-game
+container. Public API to reuse (do not reimplement):
 
-- `scrabble.NewSolver(rs, finder)` → `GenerateMoves(b, r, mode)` (ranked,
-  highest score first), `ValidatePlay(b, dir, tiles)`, `ScorePlay(...)`;
-  `scrabble.Apply(b, m)`; types `Move/Word/Placement/Direction/Mode`
+- `scrabble.NewSolver(rs, finder)` → `GenerateMoves(b, r, mode)` (ranked, highest
+  score first), `ValidatePlay(b, dir, tiles)`, `ScorePlay(...)`; `scrabble.Apply(b, m)`;
+  types `Move/Word/Placement/Direction/Mode`
   (`scrabble-solver/scrabble/{solver,move,apply}.go`).
-- `rules.English() / RussianScrabble() / Erudit()`
-  (`scrabble-solver/rules/rules.go`).
+- `rules.English() / RussianScrabble() / Erudit()` (`scrabble-solver/rules/rules.go`).
 - `board.New / Parse / Clone / Transpose`; `rack.New / Add / Remove / Clone`;
   `selfplay.NewBag / Draw / Len` (bag pattern).
 - Load committed dictionaries with `dawg.Load(path)` from
@@ -99,20 +100,17 @@ API to reuse (do not reimplement):
 
 Constraints:
 - Words/tiles are **alphabet-index bytes**, meaningful only with the matching
-  `rules.Ruleset` (`Alphabet.Decode`); blank flag carried separately. **Decode
+  `rules.Ruleset` (`Alphabet.Decode`); the blank flag is carried separately. **Decode
   to real characters before persisting history** (history must be
   dictionary-independent — see `docs/ARCHITECTURE.md` §9.1).
 - The solver's `internal/*` is NOT importable from this sibling module.
 - **GCG is test-only** in the solver (no public writer) — we ship our own.
-- Wiring: add `replace scrabble-solver => ../scrabble-solver` to `go.work` in
-  **Stage 2** (when `internal/engine` first imports it), and make CI check out
-  the solver sibling (`https://gitea.iliadenisov.ru/.../scrabble-solver.git`).
-  It uses published `github.com/iliadenisov/{alphabet,dafsa}` (no local replace).
+- The solver uses published `github.com/iliadenisov/{alphabet,dafsa}` (no local replace).
 
 ## Repository layout
 
 ```
-go.work                      # use the existing modules; grows per stage
+go.work                      # the go.work monorepo
 backend/                     # module scrabble/backend
   cmd/backend/               # main: telemetry -> db+migrate -> cache -> server
   cmd/jetgen/                # dev tool: regenerate go-jet code (throwaway container)
@@ -123,12 +121,14 @@ backend/                     # module scrabble/backend
   internal/session/          # opaque tokens, sessions store, cache, service
   internal/server/           # gin engine, /api/v1 groups, X-User-ID, probes
   internal/inttest/          # //go:build integration Postgres-backed tests
-docs/  .gitea/workflows/  PLAN.md  CLAUDE.md  README.md
-gateway/  ui/  pkg/              # added by their stages
-platform/telegram/               # Telegram connector side-service (Stage 9): bot + gRPC API
-loadtest/                        # module scrabble/loadtest: the pre-release stress harness (R2)
-backend/Dockerfile gateway/Dockerfile platform/telegram/Dockerfile loadtest/Dockerfile  # multi-stage distroless (Stage 16; loadtest R2); gateway/Dockerfile also has the `landing` target (R3)
-deploy/                          # docker-compose (per-service limits, R7) + caddy + landing + otelcol (OTLP + docker_stats per-container metrics) + prometheus/tempo/grafana + postgres_exporter
+gateway/                     # module scrabble/gateway: Connect-RPC edge, embeds the SPA
+ui/                          # Svelte + Vite SPA + landing (Node project, not in go.work)
+pkg/                         # shared: telemetry, version, wire/FlatBuffers, proto, mtls
+platform/telegram/           # Telegram side-service: cmd/validator (HMAC, no VPN) + cmd/bot (Bot API; dials gateway over reverse mTLS bot-link)
+loadtest/                    # module scrabble/loadtest: the load/stress harness
+docs/  .gitea/workflows/  CLAUDE.md  README.md
+backend/Dockerfile gateway/Dockerfile platform/telegram/Dockerfile loadtest/Dockerfile  # multi-stage distroless; gateway/Dockerfile has the `landing` target, platform/telegram/Dockerfile has `validator`+`bot` targets
+deploy/                      # docker-compose (+ prod overlay + bot host) + ansible provisioning + caddy + landing + otelcol (OTLP + docker_stats) + prometheus/tempo/grafana + node_exporter + postgres_exporter; prod-deploy.sh
 ```
 
 ## Build & test
@@ -138,20 +138,19 @@ go build ./backend/...          # per module ('./...' from the root won't span t
 go vet ./backend/...
 gofmt -l .                      # must print nothing
 go test -count=1 ./backend/...
-go build ./platform/telegram/... && go test ./platform/telegram/...  # Telegram connector (Stage 9)
+go build ./platform/telegram/... && go test ./platform/telegram/...  # Telegram validator + bot
 go run ./backend/cmd/backend    # /healthz, /readyz on :8080
 
-cd ui && pnpm install && pnpm check && pnpm test:unit && pnpm build  # the UI (Stage 7+)
+cd ui && pnpm install && pnpm check && pnpm test:unit && pnpm build  # the UI
 pnpm start                      # UI mock mode: lobby -> game, no backend
 
-docker build -f backend/Dockerfile -t scrabble-backend .   # images (Stage 16); gateway embeds the SPA
+docker build --build-arg DICT_VERSION=v1.3.0 -f backend/Dockerfile -t scrabble-backend .  # DICT_VERSION required (no default); gateway embeds the SPA
 docker build -f gateway/Dockerfile --target gateway -t scrabble-gateway .
-docker build -f gateway/Dockerfile --target landing -t scrabble-landing .  # static landing (R3)
+docker build -f gateway/Dockerfile --target landing -t scrabble-landing .  # static landing
 docker compose -f deploy/docker-compose.yml config         # validate the full contour
 ```
 
-The `ui` module is a Node project (pnpm), **not** in `go.work`; it is the `ui` job
-of the single `.gitea/workflows/ci.yaml` (Stage 16 folded the former go-unit /
-integration / ui-test workflows into it). Committed edge codegen under `ui/src/gen/`
+The `ui` module is a Node project (pnpm), **not** in `go.work`; it is the `ui` job of
+the single `.gitea/workflows/ci.yaml`. Committed edge codegen under `ui/src/gen/`
 (regenerate with `pnpm codegen`); pnpm build-script approval lives in
 `ui/pnpm-workspace.yaml` (`allowBuilds: esbuild: true`).

PRERELEASE.md

@@ -1,468 +0,0 @@
-# Pre-release plan — hardening before Stage 18
-
-Living tracker for the pre-release hardening pass that runs **before Stage 18** (the
-prod cutover). Same discipline as [`PLAN.md`](PLAN.md): one phase per session,
-**interview the owner on the open details** at the start of each phase, bake every
-decision back into `PLAN.md` / `docs/` / the affected `README`s / Go Doc comments in
-the **same** PR, get CI green, then mark the phase done. Phases run as
-`feature/* → development` PRs (the Stage 16 branch model); the owner approves+merges.
-
-**Why now:** the system is feature-complete through Stage 17 and the test contour is
-green, but there is **no prod data yet** — schema, wire labels and the dictionary
-layout can still change for free. These phases spend that one-time freedom and harden
-the edge before prod. Each phase maps back to the owner's raw pre-release TODO list
-(numbers in the tracker).
-
-## Phase tracker
-
-| # | Phase | Raw TODOs | Status |
-|---|-------|-----------|--------|
-| R1 | Schema & naming reset | 1 + 10 | **done** |
-| R2 | Stress harness + contour observability + early run | 9a | **done** |
-| R3 | Edge hardening | 2 + 8 + 3 | **done** |
-| R4 | Push enrichment + kill the last poll | 4 + 5 | **done** |
-| R5 | Bundle slimming | 6 | **done** |
-| R6 | Refactor + docs reconciliation + de-staging | 7 | **done** |
-| R7 | Final stress run + tuning | 9b | **done** |
-| UI | Tab-bar navigation redesign (drop the hamburger) | owner ad-hoc | **done** |
-| MW | "Multiple words per turn" rule for Russian games (engine v1.1.0) | owner ad-hoc | **done** |
-| MW2 | Single-word rule connectivity fix: the word must run along its own line through an existing tile (perpendicular-only contact no longer connects); single-tile direction picks the best legal word (engine v1.1.1) | owner ad-hoc | **done** |
-| MW3 | Graceful replay degradation: a game whose journalled move became illegal under MW2 is closed as a draw (`end_reason='aborted'`) on open instead of erroring, with an impersonal organizer note in the history + GCG (migration `00002`) | owner ad-hoc | **done** |
-| OW | Open auto-match: enter the game at once and wait inside it (robot after 90–180 s) | owner ad-hoc | **done** |
-| DA | Dictionary admin: online release-archive upload → word-diff preview → install/activate; versioned dict volume; active version persisted in DB; resident label = release tag | owner ad-hoc | **done** |
-| AB | Manual account block (admin suspension): permanent/temporary with an editable en+ru reason picklist; a block forfeits the player's active games + cancels their open ones; a backend gate refuses a blocked account with **403 `account_blocked`**; the UI shows a terminal blocked screen and stops all push/poll; manual unblock; temporary blocks self-expire (migration `00003`) | owner ad-hoc | **done** |
-| → | Stage 18 — prod contour deploy | — | see [`PLAN.md`](PLAN.md) |
-
-## Key findings (these reshaped the raw list — read before starting a phase)
-
-- **R1 (TODO 1 + 10) is one cheap moment, now.** Squashing the 12 goose migrations is
-  safe precisely because there is no prod data and the contour DB is wiped. Folding the
-  new variant labels (`scrabble_ru`/`scrabble_en`/`erudit_ru`) into that single baseline
-  makes the rename need **no data migration and no back-compat mapping**. Today's labels
-  (`english`/`russian_scrabble`/`erudit`) are persisted in `games.variant`,
-  `game_invitations.variant`, in `pkg/fbs` and the UI — ~100 files, but a mechanical sweep
-  on a clean DB.
-- **R4 (TODO 4 + 5): the app is already push-first.** Game state refreshes on
-  `your_turn`/`opponent_moved`, the lobby on `notify`, chat on `chat_message`. The **only**
-  genuine periodic server poll is `lobby.poll` (matchmaking, 2.5 s,
-  `ui/src/screens/NewGame.svelte`). What remains is killing that one poll **and** enriching
-  push events to carry payloads so the UI stops re-fetching after each signal.
-- **R3 (TODO 2): identity forgery is already mitigated.** Identity is always derived from
-  the session (`Authorization: Bearer` → `X-User-ID`); the client cannot inject identity,
-  the backend re-validates resource ownership, Telegram initData is HMAC-checked. The real
-  gaps are a missing **request-body size limit** (cheap DoS) and **invisible rate-limit
-  rejections** (no log/metric/admin view — that is TODO 8). Static landing serving is **not**
-  covered by the gateway token bucket (it only guards `Execute`).
-- **R6 (TODO 7) scale:** ~431 `Stage N` references across ~104 files (incl. the file name
-  `backend/internal/inttest/stage6_test.go`). Code is the source of truth; `docs/` describe
-  current state; `PLAN.md` keeps the decision history.
-
-## Locked decisions (owner interview)
-
-- **Stress test (TODO 9):** **early + final** runs. Driver = **edge protocol** (Connect/FB
-  through the gateway, moves generated by the solver) **plus a separate gateway-hammer**
-  saturation test. Pacing = **realistic (under limits) + saturation (ramp to the knee)**.
-  Resource metrics = **add cAdvisor + postgres_exporter to the contour** (today only
-  Go-runtime metrics exist). The harness stays in the repo for repeats.
-- **Push (TODO 4 + 5):** **both** — kill `lobby.poll` (use the existing `match_found`, keep
-  poll as the ws-down fallback) **and** enrich push events with payloads.
-- **Refactor (TODO 7):** **hygiene + structural changes by a reviewed list** —
-  behaviour-preserving, test-gated, contentious items surfaced to the owner before applying.
-- **Landing (TODO 3):** **separate static container** behind the project caddy
-  (`/` → landing, `/app/` + `/telegram/` → gateway); drop `landing.html` from the gateway
-  `go:embed`.
-- **Rate-abuse (TODO 8):** metric + Grafana + admin view **plus a conservative auto-flag** —
-  a *soft, reversible* "suspected high-rate" marker for operator review, tunable threshold,
-  **no auto-ban**.
-- **Open auto-match (owner ad-hoc):** a quick game **enters a real game at once and waits inside
-  it** (status `open`, the opponent seat empty); a second human searching the same variant+rule
-  joins it, or a robot fills it after a **90 s + random 0–90 s** wait, pushing the in-app
-  **opponent_joined** event. While open, the starter may move on their turn but resign, chat and
-  nudge are disabled, and the lobby + opponent card read "searching for opponent". Matchmaking is
-  now **DB-backed open games** — the in-memory pool, `lobby.poll` and `lobby.cancel` are gone. The
-  schema is edited in the baseline (no prod data); `game_players.account_id` is nullable for the
-  empty seat.
-
-## Phases
-
-Each phase: read this tracker + the relevant `docs/`, **interview the owner on the open
-details below**, implement within scope, then update the tracker + docs/code and get CI
-green before marking it done.
-
-### R1 — Schema & naming reset *(TODO 1 + 10)* — first
-Squash `backend/internal/postgres/migrations/00001..00012` into one `00001_baseline.sql`
-(method: `pg_dump --schema-only` from a fully-migrated DB → wrap as the goose baseline →
-prove a fresh migrate yields a schema identical to the 12-migration chain via the
-integration suite → delete the old files; keep goose). Bake the new variant labels into the
-baseline. Propagate `scrabble_ru`/`scrabble_en`/`erudit_ru` through the backend
-(`engine.Variant`/`ParseVariant`, `registry.dictFiles`, the CHECK values), the wire
-(`pkg/fbs` `variant:string`, regenerate FB) and the UI (`lib/model.ts` union, `variants.ts`,
-fixtures, premium/alphabet keys, tests); i18n display keys stay display-only. Tidy
-`../scrabble-dictionary` to a single source→dawg build point and align the dawg artifact
-names to the new labels (crosses into `../scrabble-solver`'s committed fixtures — keep them
-byte-identical). After merge, **wipe the contour DB** (drop the volume) so it re-provisions
-on the next deploy.
-- Critical files: `backend/internal/postgres/migrations/`,
-  `backend/internal/engine/{engine,registry}.go`, `pkg/fbs/scrabble.fbs`,
-  `ui/src/lib/{model,variants}.ts`, `../scrabble-dictionary/{Makefile,cmd/builddict,…}`.
-- Open details to interview: the exact dawg filename scheme; whether the dict-repo tidy is
-  one PR or split; how to script the contour DB wipe in the deploy.
-
-### R2 — Stress harness + contour observability + early run *(TODO 9, part 1)*
-Build the reusable load harness as a new `loadtest` module in `go.work` (reuses `pkg/fbs`,
-`connect-go`, and `scrabble-solver` for legal-move generation): a seeder that inserts
-**1000 guest + 10000 durable** accounts with pre-created sessions (token hashes) directly in
-the DB and hands the plaintext tokens to the client; a driver that runs N virtual users,
-each in 3–5 concurrent 2–4-player games, exercising submit-play / pass / exchange / nudge /
-chat / check-word / draft-move / profile-save through the **edge protocol**, in
-**realistic** (under rate limits) and **saturation** (ramp) modes; plus a separate
-**gateway-hammer** that deliberately exceeds limits to verify the limiter holds and measure
-its cost. Add **cAdvisor + postgres_exporter** to `deploy/docker-compose.yml` and a Grafana
-resource dashboard. Run the **early pass** against the freshly-wiped contour; produce a
-**trip report** (logic/concurrency bugs + a resource baseline) that feeds R3 and R6.
-- Critical files: new `loadtest/`, `deploy/docker-compose.yml`, `deploy/observability/*`,
-  `docs/TESTING.md`.
-- Open details: the scale ramp steps; the move-selection policy (a mid-ranked solver move
-  for realistic game progress); run duration; the pass/fail bar.
-
-### R3 — Edge hardening *(TODO 2 + 8 + 3)*
-Add a **request-body size cap** at the gateway h2c mux / `Execute` (e.g. ~1 MB). Add
-**rate-limit observability**: a `gateway_rate_limited_total{class}` counter + a structured
-log per rejection; an **aggregate** Grafana panel (request rate + rejection rate — spikes
-visible without per-user label cardinality, honouring the Stage 12/17 discipline); an
-**admin-console view** of recently throttled users/IPs (in-memory ring buffer, single-
-instance, reset-on-restart, like the `active_users` gauge). Add the **conservative
-auto-flag**: when a user is *sustained*-throttled past a tunable threshold, set a soft,
-reversible `account.flagged_high_rate_at` marker (baked into the R1 baseline) surfaced in the
-admin user list/detail — **no auto-ban**; the operator clears it. Split the **landing** into
-its own static container (`deploy/` + a Caddyfile route `/` → landing) and drop
-`landing.html` from the gateway `go:embed`.
-- Critical files: `gateway/internal/connectsrv/server.go`, `gateway/internal/ratelimit/`,
-  `gateway/internal/connectsrv/metrics.go`, `backend/internal/adminconsole/`,
-  `deploy/caddy/Caddyfile`, `deploy/docker-compose.yml`, `gateway/internal/webui/`.
-- Open details: the auto-flag threshold/window + whether the marker is persisted vs
-  in-memory; the landing image base (caddy vs nginx).
-
-### R4 — Push enrichment + kill the last poll *(TODO 4 + 5)*
-Replace `lobby.poll` with the existing `match_found` push (keep the poll as a ws-down
-fallback). Enrich `your_turn`/`opponent_moved`/`notify` to carry the state payload so the UI
-renders from the event without a follow-up `game.state` (removes the lobby↔game nav latency
-the owner noticed). Wire-contract change: `pkg/fbs` event payloads → backend `notify` emit →
-UI stream consumers (`ui/src/lib/app.svelte.ts`), with the per-game cache as the landing
-spot; regenerate FB.
-- Critical files: `pkg/fbs/scrabble.fbs`, `backend/internal/notify/events.go`,
-  `ui/src/lib/{app.svelte,transport}.ts`, `ui/src/screens/NewGame.svelte`.
-- Open details: which events carry full vs delta payloads; the fallback-poll cadence when the
-  stream is down.
-
-### R5 — Bundle slimming *(TODO 6)* — done
-Analysed the bundle against the 100 KB-gzip budget; **no code slimming was warranted**, and the
-budget metric was retargeted to measure the app correctly. The build already minifies +
-tree-shakes; the dominant cost is the Connect/FlatBuffers transport runtime + generated bindings
-+ the Svelte runtime (≈⅔ of `main`'s source is third-party/generated) — irreducible within scope.
-**Lazy-loading was rejected**: `bundle-size.mjs` sums every emitted chunk, so code-splitting yields
-no total-size win and adds request latency (+N gateway fetches on first navigation to a split
-screen). i18n lazy-load was skipped (the catalogs are a sliver of a Svelte-runtime-dominated shared
-chunk, and `en` must stay bundled as the `MessageKey` type source + fallback). Instead,
-`bundle-size.mjs` now measures **per HTML entry**, with three independent gates on the natural chunk
-boundaries — **app entry ≤ 100 KB, the Svelte+i18n shared chunk ≤ 30 KB, the landing's own chunk
-≤ 5 KB** — since the app's real payload is its entry chunk plus the shared chunk (≈97 KB), while the
-landing (≈24 KB) is reported separately and kept minimal. Same CLI + exit-code contract, so the CI
-step is unchanged.
-- Critical files: `ui/scripts/bundle-size.mjs`; no app code changed.
-
-### R6 — Refactor + docs reconciliation + de-staging *(TODO 7)* — done
-Behaviour-preserving only. Three separable, separately-committed passes: (a) mechanical
-**de-staging** — remove `Stage N`/`TODO-N` references from code, comments and service
-READMEs (rename `stage6_test.go`); (b) **docs↔code reconciliation** — reconcile
-`docs/ARCHITECTURE.md` / `docs/FUNCTIONAL.md`(+`_ru`) against the code-as-truth, fixing drift
-and Go Doc comments; (c) **structural changes by a reviewed list** — surface a list of
-proposed optimizations / test-suite consolidations to the owner, apply only the approved,
-behaviour-preserving, test-gated ones. The full suite + the final stress run (R7) are the
-regression gate. Incorporates the early-run (R2) bug fixes not already shipped.
-- Open details: the structural-changes list itself (owner-approved before applying); the test
-  consolidation targets.
-
-### R7 — Final stress run + tuning *(TODO 9, part 2)* — done
-Re-run the R2 harness against the final, refactored system on a clean contour; analyse
-resource consumption across **all** components (gateway, backend, Postgres, the
-metrics/observability stack, docker log volume) and agree the tuning (pool sizes, rate
-limits, cache TTLs, container limits, GOMAXPROCS, log levels). Apply the agreed tuning; record
-the methodology + results in the repo.
-
-→ **Stage 18** (prod contour) then proceeds per [`PLAN.md`](PLAN.md).
-
-## Sequencing rationale
-
-`R1` first (cheapest now; everything builds on the final schema/naming and the stress test
-must run against it). `R2` builds the harness and runs the **early** pass to surface bugs and
-a resource baseline that feed `R3` and `R6`. `R3`/`R4`/`R5` harden and improve the system.
-`R6` (de-stage + reconcile + structural) runs near the end so it sweeps settled code once and
-benefits from all accumulated bug knowledge. `R7` validates the final system and tunes it.
-Then Stage 18.
-
-## Regression-safety discipline (cross-cutting)
-
-- Every phase is a `feature/* → development` PR; CI (`unit` + `integration` + `ui` behind the
-  `CI / gate` check) must be green before the owner merges; watch the post-merge contour
-  deploy with `gitea-ci-watch.py`.
-- `R6` structural changes are behaviour-preserving, test-gated, and split from the mechanical
-  sweeps; contentious items are owner-approved first.
-- The two stress runs (`R2` early, `R7` final) are the system-level regression gate.
-
-## Verification (per phase)
-
-- `go build ./<module>/...`, `go vet`, `gofmt -l .` clean, `go test -count=1 ./<module>/...`;
-  UI: `pnpm check && pnpm test:unit && pnpm build`; the integration suite
-  (`-tags integration`) for DB/schema changes; `docker compose config` for deploy changes;
-  green CI on the PR + a healthy contour deploy.
-- `R1`: prove the squashed baseline yields a schema identical to the 12-migration chain
-  (integration suite on a fresh DB) **before** deleting the old files.
-- `R2`/`R7`: the harness runs end-to-end against the contour; the trip report lists concrete
-  defects + a resource profile from the Grafana cAdvisor/postgres_exporter panels.
-
-## Refinements logged during implementation
-
-- **R1** (interview + implementation):
-  - **Variant labels** `english`/`russian_scrabble`/`erudit` → **`scrabble_en`/`scrabble_ru`/`erudit_ru`**
-    across the backend (`engine.Variant.String`/`ParseVariant`; the `games`/`game_invitations` `variant`
-    CHECK in the baseline; GCG `#lexicon` and the `variant` metric attribute both flow from `String`),
-    the wire (`pkg/fbs` `variant` is a `string` field — values change with **no FlatBuffers regen**) and
-    the UI (`model.ts` union, `variants.ts` records, `codec`/`premiums`/mocks/tests, the admin
-    `dictionary.gohtml`). **Kept:** the Go enum identifiers (`VariantEnglish`…, internal) and the i18n
-    display keys (`new.english`/`new.russian`/`new.erudit`, display-only). `complaints.variant` stays
-    free-text (no CHECK, as before).
-  - **dawg filenames kept descriptive** (`en_sowpods`/`ru_scrabble`/`ru_erudit`) — only the registry's
-    `Variant` key carries the rename, so `registry.go`, the published `scrabble-solver` fixtures and the
-    dictionary release artifact are untouched (decouples the three repos).
-  - **Migrations squashed** 12 → one hand-written `00001_baseline.sql`. Verified by a
-    `pg_dump --schema-only` diff (the chain vs the baseline are **identical** but for the two intended
-    variant-CHECK values) plus the green integration suite. **No data migration** (no production data).
-  - **Done (cross-repo + contour):** the **`scrabble-dictionary` tidy** merged (PR #2) and was re-cut as
-    the **byte-identical `v1.0.1`** release for clean provenance (the backend stays on `v1.0.0` — same
-    bytes, no rewire; the backend pulls a version-pinned release artifact, not master). Post-merge the
-    contour `backend` schema was wiped (`DROP SCHEMA backend CASCADE` + restart, not a volume drop) and
-    re-migrated to the baseline — verified the new variant CHECK (`scrabble_en/scrabble_ru/erudit_ru`),
-    `games`=0 and a clean boot.
-
-- **R2** (interview + implementation):
-  - **Locked decisions:** game assembly via **invitations** (real path, no robots; not direct game-row
-    inserts); **moderate** ramp **50 → 200 → 500** at 10 min/step; **diagnostic** pass bar (no SLO gate);
-    run as a **one-shot container on `scrabble-internal`** in this PR.
-  - **Harness** = new `scrabble/loadtest` module (`use ./loadtest` + a `replace scrabble/gateway` for the
-    dot-free edge-proto import). It seeds 1000 guest + 10000 durable accounts + sessions **directly in
-    Postgres** (token hash mirrors `backend/internal/session`), drives players over the **edge protocol**,
-    generates **mid-ranked legal moves locally** with the embedded `scrabble-solver` by replaying
-    `game.history` (the edge carries no board — mirrors `engine.ReplayBoard` via the public API), and a
-    **gateway-hammer**. Compact CLI (`run` / `cleanup`), distroless Dockerfile (DAWGs baked), Go unit tests.
-  - **Adding the module broke the other images' builds** — backend/gateway/telegram Dockerfiles reduce the
-    workspace but still referenced `./loadtest` (not in their context); each now also
-    `-dropuse=./loadtest` (backend/telegram additionally `-dropreplace` the gateway replace). Caught by the
-    first deploy run; verified by building all four images.
-  - **Harness payload fixes found by the smoke pass:** the draft DTO's `rack_order` is a string (was sent
-    as `[]` → `bad_request`); the display-name validator forbids digits/colons, so the cleanup marker
-    became a letters-only `Zzloadtest` so `profile.update` resends the seeded name. `chat_not_your_turn` /
-    `nudge_own_turn` are **by-design** turn gates, correctly exercised.
-  - **Observability:** added **cAdvisor + postgres_exporter** + the **Scrabble — Resources** dashboard +
-    two Prometheus jobs. **Finding:** cAdvisor yields only the root cgroup on the contour host (separate
-    XFS `/var/lib/docker` breaks its layer-ID resolution — the existing galaxy deploy has the same limit),
-    so per-container CPU/RSS for the early pass was captured via `docker stats`. **R7:** adopt the otelcol
-    `docker_stats` receiver (already the contrib image) for per-container metrics in Grafana.
-  - **Early run (2026-06-09):** ramped clean to 500 players, no crash/deadlock, cleanup removed all 11000
-    accounts. 1.2 M edge calls, 48 870 plays, 2 798 games finished; the per-user limiter held under the
-    hammer (99.97 % rejected, p99 2 ms). **Top finding:** ~14 % `transport_error` on `game.state` at 500
-    players, under CPU saturation (backend/gateway/Postgres each ~1 core) and amplified by the harness's
-    single shared `http2.Transport`; the harness itself peaked at 86 % of a core on the same host, so the
-    figures are pessimistic. Full trip report in [`../loadtest/REPORT-R2.md`](../loadtest/REPORT-R2.md);
-    it feeds R3 (h2c `MaxConcurrentStreams`/timeouts, body-size cap), R6 and R7 (per-player transports,
-    separate hardware, pool/limit sizing).
-  - **CI:** `./loadtest/...` added to the path filter + vet/build/test; `go.work.sum` carries the new deps.
-
-- **R3** (interview + implementation):
-  - **Locked decisions:** the flag column lands by **editing the R1 baseline** (+ a contour schema
-    wipe after merge — no migration chain accrues before prod); auto-flag defaults **1000 rejected /
-    10 min** (`BACKEND_HIGHRATE_FLAG_THRESHOLD`/`_WINDOW`, rolling window, set-once, operator clears,
-    no auto-ban); landing image = **caddy:2-alpine**; throttle data flows **gateway → backend** (a
-    30 s per-key summary POST to the new `/api/v1/internal/ratelimit/report`, the existing trusted
-    direction) with the episode window + flag rule in the backend (`internal/ratewatch`); rejection
-    logging = **Warn summary per key per window + Debug per rejection** — a deliberate deviation from
-    the phase's "structured log per rejection" (the R2 hammer would have logged ~522k lines in
-    minutes); all three R2-report tails included (explicit h2c sizing, the session-resolve failure
-    cause at Warn, reviving the admin limiter).
-  - **Body cap:** `GATEWAY_MAX_BODY_BYTES` (default 1 MiB) as both the Connect per-message read limit
-    and an `http.MaxBytesReader` wrap of the public mux; an oversized Execute is `resource_exhausted`.
-  - **Dead config found:** `AdminPerMinute`/`AdminBurst` were never wired — the gateway `/_gm` mount is
-    now 429-guarded per IP ahead of its Basic-Auth. The caddy-fronted contour path stays unlimited
-    (stock caddy has no limiter) — an accepted gap, recorded in `docs/ARCHITECTURE.md` §12.
-  - **Landing split:** a `landing` target in `gateway/Dockerfile` (the UI build stage is shared;
-    identical compose build args keep it one cached build); the gateway drops `landing.html` from the
-    embed and 308-redirects `/` → `/app/`; the contour caddy routes `/app/`, `/telegram/` and the
-    Connect path to the gateway and the catch-all to the landing container; the CI deploy probe now
-    checks both `/` (landing) and `/app/` (gateway).
-  - **Observability:** `gateway_rate_limited_total{class}` (user/public/email/admin, aggregate-only)
-    + a rate-vs-rejections panel on the Edge/UX dashboard; the admin console gains the **Throttled**
-    page (the in-memory episode window, reset-on-restart like `active_users`, plus the flagged-account
-    queue) and the flag badge / clear action on the user list / card.
-  - The jet regen also restored the previously missing `game_drafts`/`game_hidden` generated models
-    (their tables were added after the last jetgen run; no behaviour change).
-
-- **R4** (interview + implementation):
-  - **Locked decisions:** **delta-first**, not full snapshots — an event carries only the new move and
-    the UI applies it to its per-game cache, keyed on `move_count` (idempotent + gap-safe: a gap or the
-    actor's own move falls back to a `game.state` + `game.history` refetch). `match_found` /
-    `game_started` carry the recipient's **initial `StateView`** (instant lobby→game); the fallback
-    refetch stays the existing two calls (no merged endpoint); the matchmaking poll runs **only while
-    the stream is down** (2.5 s); **all** UI-state-changing events carry their payload (incl. lobby `notify`).
-  - **Enriched events** (`pkg/fbs` trailing fields — backward-compatible, no FB regen of *values*, only
-    the schema): `opponent_moved` (+`move`/`game`/`bag_len`), `your_turn` (+`move_count`), `match_found`
-    (+`state`), `game_over` (+`game`), `notify` (+`account`/`invitation`/`state`). The pre-R4
-    `opponent_moved` scalars (`seat`/`action`/`score`/`total`) stay for wire back-compat, now redundant
-    with `move`/`game` — slated for the R6 de-stage.
-  - **Encoding placement:** the `notify` package keeps ownership of the FlatBuffers encoding (a new
-    `encode.go` mirrors the gateway transcode but reads wire-agnostic `notify.*` input structs +
-    `engine.MoveRecord`); the game/lobby/social services map their domain types to those structs, so the
-    wire schema stays out of the domain. **Flagged for R6:** this partly duplicates the gateway encoders
-    (different source types) — a candidate consolidation.
-  - **Actor self-fetch killed too** (beyond literal "push"): the `submit_play`/`pass`/`exchange`/`resign`
-    **response** (`MoveResult`) now returns the actor's refilled rack + bag size, so the mover renders the
-    next turn from the response — `Game.svelte`'s `commit`/`pass`/`exchange`/`resign` drop their `await load()`.
-  - **`match_found` enrichment** needs a per-seat initial state: `lobby.GameCreator` gained `InitialState`,
-    and `game.Service.InitialState` builds the `notify.PlayerState` (rack re-encoded to wire indices, the
-    variant alphabet embedded for a first-seen variant).
-  - **UI:** a pure `lib/gamedelta.ts` reducer (`applyMoveDelta` / `applyGameOver` / `seedInitialState`,
-    unit-tested) advances the cache; `app.svelte` seeds it on `match_found` / `game_started`; `Game.svelte`
-    applies the delta (falling back to `load()` while composing, on a gap, or on its own move's new rack);
-    `NewGame.svelte` polls only when `app.streamAlive` is false and guards its teardown so a push-delivered
-    match is not cancelled.
-  - **notify (friends/invitations) scope:** the backend carries the full account / invitation payload on the
-    wire (per "all events → push"); the UI seeds the game cache from `game_started` but keeps its lightweight
-    **authoritative** badge refresh (`refreshNotifications`, on the rare `notify` event + on foreground) rather
-    than adding client-side friend/invitation caches — the per-move hot path is fully de-fetched, which was the
-    goal. Deeper lobby-cache consumption is an easy follow-up.
-  - **No schema change** (no migration); the contour needs no DB wipe. Tests: `notify` FB round-trips +
-    `emitMove` delta + the `gamedelta` reducer; the e2e mock now emits the enriched delta.
-
-- **R5** (interview + implementation):
-  - **No code slimming — by analysis.** A gzip measure + sourcemap attribution of the real `dist` showed
-    the app bundle is already minified + tree-shaken and dominated by the Connect/FlatBuffers transport
-    runtime + generated FB/PB bindings (≈⅔ of `main`'s source) and the Svelte runtime — all
-    third-party/generated, irreducible within R5's scope. App-authored code carries no hand-trimmable fat.
-  - **Lazy-load rejected** (screens *and* i18n): `bundle-size.mjs` sums every emitted chunk, so
-    code-splitting moves bytes between chunks for **zero total-size win** while adding request latency (+N
-    gateway fetches on first navigation to a split screen). i18n lazy-load additionally buys ≤3 KB (en-only
-    users) at the cost of an async `t()`, and `en` must stay bundled (it is the `MessageKey` type source +
-    fallback). **Chunk-collapsing rejected** too — keeping the near-static Svelte runtime in its own
-    cacheable chunk is the recommended practice (an app deploy then re-busts only `main`, not the runtime),
-    and HTTP/2 makes the extra preload request negligible.
-  - **Metric retargeted to the app.** The two-entry build (`index.html` app + `landing.html`) makes Rollup
-    hoist the code shared by both (Svelte runtime + i18n + `aboutContent`) into one preloaded chunk, so the
-    app actually loads its entry chunk **+ the shared chunk** (≈74 + ≈23 = **≈97 KB**), never `landing.js`
-    (≈1.6 KB). The old script summed all three chunks (98.8 KB), over-counting the app by `landing.js`.
-    `bundle-size.mjs` now parses each built HTML for the JS it eagerly loads and gates three parts
-    independently — **app entry ≤ 100 KB, shared (Svelte+i18n) ≤ 30 KB, landing-own ≤ 5 KB** — reporting the
-    app total (≈97) and landing total (≈24.5). Same CLI + exit-code contract, so the CI step is unchanged.
-  - **No app/source/build change** (`App.svelte`, `lib/i18n/`, `vite.config.ts` untouched); no schema
-    change, no contour wipe. The stale "~82 KB" figure was corrected in `bundle-size.mjs` and `ui/README.md`.
-
-- **R6** (interview + implementation):
-  - **Locked decisions:** apply **both** wire/code structural changes (**B** + **A**) and **only C1+C2** of
-    the test consolidation (not C3/C5); strip the `*(Stage N)*` tags from **all current-state docs**
-    (ARCHITECTURE / FUNCTIONAL+`_ru` / TESTING / UI_DESIGN), keeping PLAN.md / PRERELEASE.md / CLAUDE.md as
-    history; **split `stage6_test.go`** by domain. The `h2cMaxConcurrentStreams` sizing stays an **R7**
-    concern (tuning, not behaviour-preserving); the R2 early run forced no code fix, so nothing was carried in.
-  - **(a) De-staging:** removed the `Stage N` / `TODO-N` / `(RN)` references across code, comments, service
-    READMEs and the current-state docs, rewording narratives to present tense (no technical content lost).
-    Renamed the only stage-named identifiers (`registerStage8`→`registerSocialOps`,
-    `registerStage11`→`registerLinkOps`) and split `stage6_test.go` (`TestEmailLoginFlow`→`email_test.go`;
-    `TestGuestAutoMatchLeavesNoStats`+`provisionGuest`→`account_test.go`). De-staged the `.fbs`/`.proto`
-    comments and regenerated: only the `.proto`-derived Go docstrings (`*_grpc.pb.go`, `push.pb.go`) changed —
-    flatc strips schema comments, so the FB Go/TS bindings were untouched.
-  - **(b) Reconciliation:** the docs were accurate (each R-phase baked its own); the one drift was a stale
-    "guest-reaping deferred (TODO-3)" note in `ARCHITECTURE.md` §3 — guest reaping is implemented, so the
-    note was replaced with the current behaviour (FUNCTIONAL/TESTING already described it).
-  - **(c) B — dead `opponent_moved` scalars:** removed `seat/action/score/total` from `OpponentMovedEvent`
-    (`pkg/fbs/scrabble.fbs` + the `notify` emit + the round-trip test); regenerated FB Go + TS. No reader
-    used them (the UI codec/mock take `move`/`game`/`bag_len`; the gateway forwards the payload verbatim).
-    A pre-release wire-slot renumber — free with no prod data, no DB change.
-  - **(c) A — shared FB builders:** new `scrabble/pkg/wire` holds the single definition of the nested wire
-    tables (GameView / MoveRecord / StateView / AccountRef / Invitation) shared by the backend `notify`
-    encoder and the gateway `transcode`; both map their own source types to neutral `wire.*` structs and
-    delegate. **Honest tradeoff:** the verbose `Start/Add/End` + reverse-prepend boilerplate is now written
-    once, but the field *set* is still mapped per side, and the new package makes the change net **+~145 LOC**
-    — a single-source / anti-drift win for the fiddly mechanics rather than a line-count cut. Behaviour-
-    preserving: the two sides' field sets were verified identical and the round-trip tests pass unchanged.
-  - **(c) C1+C2 — inttest fixtures:** moved the cross-file service/game fixtures (`newGameService` was used by
-    10 files) into `backend/internal/inttest/helpers.go`; single-file helpers stay local. Pure relocation.
-  - **No schema change → no contour DB wipe.** Regression gate: the full unit + integration + UI suites plus
-    the R7 stress run.
-
-- **R7** (interview + implementation):
-  - **Locked decisions:** run the harness **same-host** (one-shot container on `scrabble-internal`, capped
-    `--cpus=3` so the contour keeps spare cores); **apply container limits + `GOMAXPROCS` now** (not just a
-    prod recommendation); **replace cAdvisor with the otelcol `docker_stats` receiver** (it resolved only the
-    root cgroup on this host); keep rate-limit / h2c knobs **compiled-in** (change values only if the data
-    demands — it did not).
-  - **Harness refinements (pre-run):** each virtual player builds its **own `edge.Client`** (its own h2c
-    connection for its Subscribe stream + Execute calls) instead of all players sharing one `http2.Transport` —
-    the R2 `transport_error` artifact; and `playTurn` now reports a **finished** game so the player drops it
-    from rotation. Effect, measured: `game.state` `transport_error` 14 % (R2) → **2.49 %**; `game_finished` on
-    chat ≈ 3 900 → **35**.
-  - **Observability:** added the `docker_stats` receiver to `otelcol` (`api_version: "1.44"` — the daemon's
-    minimum is 1.40; the receiver defaults to 1.25 and crash-looped until pinned), mounted the docker socket
-    read-only with `group_add` (the contrib image runs as UID 10001), dropped the cAdvisor service + its
-    Prometheus job, and retargeted the **Scrabble — Resources** dashboard to the docker_stats metric names
-    (`container_cpu_utilization`/100 == cores). Cross-checked against `docker stats` within sampling error.
-  - **Profile (final run, 500 players, limits in force):** the **gateway is the binding constraint** — with
-    one connection per player it bursts into its 2-core cap (the residual 2.49 % `transport_error`); backend
-    ~0.85 core and postgres ~1.4 cores had headroom; **tempo reached its 1 GiB cap**; the backend pool sat at
-    its `MaxOpenConns=25` cap (28 backends); docker logs were unbounded (~14 MiB / 30 min on the backend at
-    info). Full write-up in [`../loadtest/REPORT-R7.md`](../loadtest/REPORT-R7.md).
-  - **Round-2 tuning (owner-agreed, all in `deploy/docker-compose.yml`, no code change):** gateway **2 → 3
-    cores + `GOMAXPROCS=3`**; tempo memory **1 → 2 GiB**; backend `MAX_OPEN_CONNS` **25 → 40**; a json-file
-    **log-rotation** default (10m × 3) applied contour-wide via a YAML anchor (level stays info).
-    backend/postgres kept at 2 cores / 512 MiB (headroom is cheap on the shared host).
-  - **Validation:** the same gradual ramp on the tuned contour cut `game.state` `transport_error` to **0.72 %**
-    (gateway ~2 cores, now under the 3-core cap, no throttle; tempo ~1.27 GiB, under 2 GiB). A separate
-    **burst** run (a single 100 → 500 jump) pegged the gateway at 3 cores (≈296 % sustained, 9.27 % error),
-    confirming it is **connection-CPU-bound** — a true arrival spike is a **horizontal-scaling** lever, not
-    more cores per node (recorded in the prod-sizing recommendation).
-  - **No schema change → no contour DB wipe.** Bake-back: `loadtest/REPORT-R7.md` (new), `loadtest/README.md`,
-    `docs/TESTING.md`, the telemetry/observability section of `docs/ARCHITECTURE.md`, the repo-layout line in `CLAUDE.md`.
-
-- **UI — Tab-bar navigation redesign** (owner ad-hoc, not on the raw TODO list): drop the hamburger
-  `Menu.svelte` everywhere (it fought the Telegram-fullscreen layout, where it had to be re-centred).
-  - **Locked decisions (interview):** the in-Settings sub-nav is a **bottom TabBar with the active tab
-    highlighted** (icon-only); **Export GCG** moves to the left slot of the move-history header (free in a
-    finished game, where 🏁 *leave* does not apply); the lobby **⚙️ badge counts incoming friend requests
-    only** (invitations keep their own lobby section); unread chat is badged on **the score bar and the 💬**.
-  - **What shipped:** a ⚙️ **Settings hub** (`screens/SettingsHub.svelte`) over the existing
-    Settings/Profile/Friends/About bodies and an in-game **comms hub** (`game/CommsHub.svelte`) over
-    chat + dictionary, both with in-place tabs and a fixed back target; the game's menu items relocate into
-    the open move history (🏁 leave / 📤 export + 💬 comms header) and the player cards (🤝 add-friend); a
-    shared **TapConfirm** (`components/TapConfirm.svelte`, `lib/tapconfirm.ts`) — tap → fading ✅ → tap —
-    replaces the Skip/Hint press-and-hold popovers and drives the add-friend confirm. Fixed the move-history
-    "jump" bug (the slid board is now inert and the stage can't scroll, so a swipe up genuinely closes it).
-    `Menu.svelte` + `HoldConfirm.svelte` removed.
-  - **No schema/wire change → no contour DB wipe.** Bake-back: `docs/UI_DESIGN.md`, `docs/FUNCTIONAL.md`
-    (+`_ru`). Regression gate: UI `check` + unit (`tapconfirm`) + build + bundle budget + e2e (Chromium &
-    WebKit), all green.
-
-- **UI — Merge Exchange/Pass; drop the dead Tournaments tab** (owner ad-hoc, not on the raw TODO
-  list): the lobby's 🏆 *Tournaments* tab was an inert `lobby.soon` toast — removed (the lobby is back
-  to three tabs, matching `docs/FUNCTIONAL.md`). In-game the separate 🥺 *Skip* (pass) tab folds into
-  the 🔄 tab, now **Exchange/Pass**, whose dialog passes when no tile is selected and exchanges when
-  tiles are.
-  - **Decision — a pass is NOT an exchange of zero (verified against the rules + GCG):** the merge is
-    **UI-only**. Pass and exchange stay distinct game actions end-to-end — wire (`GameActionRequest` vs
-    `ExchangeRequest`), engine (`ActionPass` vs `ActionExchange`), and the GCG Poslfit dialect (a pass is
-    a bare `-`, an exchange is `-TILES`). The engine forbids a zero-tile exchange (`ErrNothingToExchange`)
-    and allows an exchange only with a full rack left in the bag (`ErrNotEnoughTilesToExchange`), while a
-    pass is always legal — collapsing them would lose a real distinction. The dialog dispatches the
-    existing `gateway.pass` / `gateway.exchange`.
-  - **What shipped:** `Lobby.svelte` (tab removed); `Game.svelte` (one 🔄 Exchange/Pass tab no longer
-    gated on an empty bag; the dialog disables tile selection while the bag is below a full rack
-    (`bagLen >= RACK_SIZE`), its confirm button reading **Pass without exchanging** / **Exchange N**);
-    i18n (`game.draw` → Exchange/Pass, new `game.passNoExchange`, dropped `game.skip` /
-    `lobby.tournaments` / `lobby.soon`). No backend/wire/history/GCG change.
-  - **No schema/wire change → no contour DB wipe.** Bake-back: `docs/UI_DESIGN.md`, `docs/FUNCTIONAL.md`
-    (+`_ru`). Regression gate: UI `check` + unit + build + bundle budget + e2e (Chromium & WebKit).

README.md

@@ -22,9 +22,8 @@ supports English Scrabble, Russian Scrabble and Эрудит.
   security, cross-service contracts.
 - [`docs/FUNCTIONAL.md`](docs/FUNCTIONAL.md) (+ [`_ru`](docs/FUNCTIONAL_ru.md)) —
   per-domain user stories.
-- [`docs/TESTING.md`](docs/TESTING.md) — test layers and the per-stage CI gate.
-- [`PLAN.md`](PLAN.md) — the staged implementation plan and stage tracker.
-- [`CLAUDE.md`](CLAUDE.md) — project guide and the mandatory per-stage workflow.
+- [`docs/TESTING.md`](docs/TESTING.md) — test layers and the CI gate.
+- [`CLAUDE.md`](CLAUDE.md) — project guide and development workflow.
 
 ## Build & test
 
@@ -90,7 +89,7 @@ observability stack (OTel Collector → Prometheus + Tempo → Grafana) + a fron
 services build from multi-stage distroless `*/Dockerfile`.
 
 ```sh
-docker build -f backend/Dockerfile -t scrabble-backend .   # pulls the DAWG release artifact
+docker build --build-arg DICT_VERSION=v1.3.0 -f backend/Dockerfile -t scrabble-backend .  # DICT_VERSION required; pulls that DAWG release artifact
 docker build -f gateway/Dockerfile -t scrabble-gateway .   # node stage builds + embeds the UI
 docker compose -f deploy/docker-compose.yml config         # validate (needs the TEST_/PROD_ env)
 ```

backend/Dockerfile

@@ -7,12 +7,14 @@
 # (GOPRIVATE), so the build stage needs git and network.
 #
 # Build from the repository root so go.work, go.work.sum, pkg/ and backend/ are all
-# in the Docker context:
-#   docker build -f backend/Dockerfile -t scrabble-backend .
+# in the Docker context. DICT_VERSION has no default — the caller supplies the
+# scrabble-dictionary release tag (compose/CI pass it; see deploy/README.md
+# "Bumping the dictionary version"):
+#   docker build --build-arg DICT_VERSION=v1.3.0 -f backend/Dockerfile -t scrabble-backend .
 
 # --- dictionary artifact -----------------------------------------------------
 FROM alpine:3.20 AS dawg
-ARG DICT_VERSION=v1.0.0
+ARG DICT_VERSION
 RUN apk add --no-cache curl tar
 RUN mkdir -p /dawg \
  && curl -fsSL -o /tmp/dawg.tar.gz \
@@ -33,14 +35,16 @@ COPY backend ./backend
 # Reduce the workspace to what the backend needs: backend + pkg. loadtest and the
 # gateway replace it requires are not in this context, so drop both.
 RUN go work edit -dropuse=./gateway -dropuse=./platform/telegram -dropuse=./loadtest -dropreplace=scrabble/gateway@v0.0.0
-RUN CGO_ENABLED=0 GOOS=linux go build -trimpath -o /out/backend ./backend/cmd/backend
+# VERSION (the deploy passes the git tag) is stamped into the binary via the linker.
+ARG VERSION=dev
+RUN CGO_ENABLED=0 GOOS=linux go build -trimpath -ldflags "-X scrabble/pkg/version.Version=${VERSION}" -o /out/backend ./backend/cmd/backend
 
 # --- runtime -----------------------------------------------------------------
 FROM gcr.io/distroless/static-debian12:nonroot
 # Re-declare the build arg in this stage so it labels the seed dictionary. One
 # DICT_VERSION drives both the artifact the dawg stage downloads and the version
 # label the binary pins, so the resident version equals the release tag.
-ARG DICT_VERSION=v1.0.0
+ARG DICT_VERSION
 COPY --from=build /out/backend /usr/local/bin/backend
 # Own the seed dictionary as the nonroot runtime user (UID 65532): a named volume
 # mounted at /opt/dawg inherits this ownership on first use, so the admin console

backend/README.md

@@ -33,10 +33,22 @@ real game seating the caller with an **empty opponent seat** (status `open`) or,
 another player already waits for the same variant and per-turn word rule, seats the
 caller into that open game and starts it — and
 friend-game invitations (invite → accept, starting a 2–4 player game once every
-invitee accepts). `internal/social` owns the friend graph (request/accept),
+invitee accepts). A **simultaneous-game cap** (`game.MaxActiveQuickGames` = 10) limits a
+player's active quick games — status `active`/`open`, excluding invitation-linked friend
+games (`game.Service.CountActiveQuickGames`); the server refuses `lobby/enqueue` and
+`invitations` creation with **409 `game_limit_reached`** at the cap (accepting an invitation
+is exempt), and the `games.list` response carries an `at_game_limit` flag for the lobby.
+`internal/social` owns the friend graph (request/accept),
 per-user blocks, and per-game chat with nudges folded in as a message kind; chat
 messages are length-capped, content-filtered (no links/emails/phone numbers,
-including obfuscated forms) and stored with the sender's IP. `internal/account`
+including obfuscated forms) and stored with the sender's IP. Each message carries an
+`unread_seats` read bitmask (a set bit per recipient seat still to read it); `MarkRead`
+clears a reader's bit when they open the move history or chat, and a wired `NudgeClearer`
+clears a nudge when its recipient moves — both record the publish-to-read latency.
+A friend request (or block) aimed at a **disguised pooled robot** is recorded per game+seat
+in `robot_friend_requests` / `robot_blocks`, never against the shared robot account; a
+background reaper drops a robot friend request once its game has been finished for **7 days**.
+`internal/account`
 gains profile editing and the email confirm-code flow (a `Mailer` seam: SMTP or a
 development log mailer). The engine now also handles **multi-player drop-out**: in
 a 3–4 player game a resignation or timeout drops that seat and the rest play on
@@ -47,18 +59,37 @@ services are exposed via `Server` accessors for those handlers.
 
 The robot opponent (`internal/robot`). A pool of durable accounts —
 each a `kind='robot'` identity, provisioned at startup with chat and friend
-requests blocked — backs human-like, per-language composed names. A background driver plays the
+requests blocked — carries human-like names. The disguised reaper stamps a **fresh per-game name** on
+the robot's seat (a `game_players.display_name` snapshot — which also freezes humans' names per game, so
+a later rename never rewrites past games) drawn from a wide composed corpus (Western locales, native
+Japanese/Chinese, a gender-agreed Russian pool, and handles); a Russian game stays Cyrillic with ≤20%
+Latin and no CJK script, an English game uses the full corpus (`namevariety.go`, `PickNamed`). A
+background driver plays the
 robot's moves through the public game API as an ordinary seated player (so only
 `internal/engine` imports the solver): it decides once per game whether to play to
-win (≈ 40%), targets a small score margin, and times its moves with a move-number-aware
+win (≈ 40%), targets a small score margin — with an occasional off-strategy move that tapers to
+none as the bag empties — and times its moves with a move-number-aware
 right-skewed delay (quick openings, long endgames), a night-sleep window anchored to the opponent's timezone, and nudge
 behaviour — all derived deterministically from the game seed, so it keeps no extra
-state. A background **reaper** seats a pooled robot (matching the game's language) in any open
+state. In a dead-drawn endgame — the last two journal moves are both passes, so the robot is bound
+to pass again — it shortens that delay to a `[0.8, 1.5]×` band around the human's last-move think
+time (the gap between the last two moves), clamped to `[30 s, 8 min]` and `min`-ed with the normal
+delay, so a decided game is not dragged out while the robot never moves slower than usual. A background **reaper** seats a pooled robot (matching the game's language) in any open
 game whose wait window — a fixed **90 s** plus a random **0–90 s** (so **90–180 s**) — has
 elapsed, and the waiting starter is told an opponent took the seat by an in-app
 **opponent_joined** push (carrying their refreshed game state) that fills the opponent card and
 re-enables resign and chat in place.
 
+The same robot also backs an **honest-AI quick game** (`games.vs_ai`), the alternative to the random
+path that the player chooses on New Game. `Matchmaker.StartVsAI` picks a pooled robot and creates a
+game **already seated and active** (random seat order) — it never enters the open pool. The robot
+driver has a `vs_ai` branch (no sleep, no proactive nudge, zero delay) plus a focused
+`DriveGame`/`TriggerMove` fast path wired from the game service's after-create/after-commit hook
+(`SetAITrigger`), so the robot replies the instant the player moves. AI games keep the same strength
+(`playToWin`), have **no per-move timeout** (`turn_timeout_secs = AIInactivityTimeout`, 7 days, so an
+abandoned game is lost after a week of inactivity — only the human is ever on the clock), record **no
+statistics** (skipped in `commit`), and disable chat/nudge (`social` `VsAI` → `ErrGameVsAI`).
+
 The backend opens to the edge. The route groups gain their first
 handlers (`internal/server/handlers_*.go`): gateway-only session endpoints under
 `/api/v1/internal` (Telegram/guest/email login → mint, resolve, revoke) and a
@@ -72,9 +103,16 @@ second listener — `internal/pushgrpc`, a gRPC server (`BACKEND_GRPC_ADDR`) str
 live events (your-turn, opponent-moved, chat, nudge, match-found, notify) to the
 gateway. The gateway-only `POST /api/v1/internal/push-target` (a user's
 Telegram `external_id`, language and `notifications_in_app_only` flag) lets the gateway
-route out-of-app push to the Telegram connector; the Telegram login
+route out-of-app push to the Telegram bot over the gateway bot-link; the Telegram login
 seeds a new account's language and display name from the launch fields, and the
 `accounts.notifications_in_app_only` flag (default true).
+The gateway-only `POST /api/v1/internal/chat-access` resolves a Telegram identity (the
+bot's join-time query) or an account id (a `chat_access_changed` event) to its
+**moderated-chat write eligibility** — `registered AND NOT suspended AND NOT chat_muted`.
+That event is emitted on an admin block/unblock, a `chat_muted` role grant/revoke, or — via
+the `account.SuspensionSweeper` started in `cmd/backend` — a temporary block lapsing;
+`chat_muted` is an `account.KnownRoles` entry, a chat-only mute distinct from the game
+suspension (which dominates it).
 `accounts.is_guest` marks an ephemeral guest — a durable row
 with no identity, excluded from statistics. The server-rendered
 **admin console** at `/_gm` (`internal/adminconsole` + `internal/server/handlers_admin_console.go`;
@@ -85,12 +123,17 @@ pipeline, the online **dictionary update** (upload the `scrabble-dawg-vX.Y.Z.tar
 archive, preview the per-variant word diff, then install + activate — `internal/dictadmin` +
 `engine.DiffWords` / `Registry.LoadAvailable`, written to per-version subdirectories of the
 `BACKEND_DICT_DIR` volume with the active version persisted in `dictionary_state`), and operator **broadcasts** via a
-backend Telegram-connector client (`internal/connector`, `BACKEND_CONNECTOR_ADDR`) — each
-broadcast picks the delivering bot by an operator-chosen language. `accounts.service_language`
-holds the language tag of the bot a Telegram
-user last signed in through, written on every login and returned by
-`/internal/push-target` (falling back to `preferred_language`) so out-of-app push routes
-to the right bot. The shared wire contracts live in the sibling [`../pkg`](../pkg) module.
+backend client (`internal/connector`, `BACKEND_CONNECTOR_ADDR`) that calls the gateway's
+**bot-link relay** — each broadcast renders through the bot in an operator-chosen language
+and the relay awaits the bot's delivery ack. There is one bot,
+so `/internal/push-target` returns the recipient's `preferred_language` as the render
+language for out-of-app push; no per-bot routing remains. The console also manages the **advertising banner** (`/_gm/banners` +
+`/_gm/banner-settings`, `internal/ads`): operator campaigns with a percent weight, an optional
+window and bilingual messages, plus the global display timings. `GET /api/v1/user/profile` attaches
+the resolved, weighted campaign feed for an **eligible** viewer (`!paid_account && hint_balance == 0
+&& !no_banner` role, the message language picked by `preferred_language`); changing those inputs
+publishes a `notify` `banner` re-poll signal so the client shows/hides it in place. The shared wire
+contracts live in the sibling [`../pkg`](../pkg) module.
 
 **Account linking & merge** (`/api/v1/user/link/*`). `internal/link`
 orchestrates it: an email confirm-code or a gateway-validated Telegram identity is
@@ -112,6 +155,13 @@ rejected calls within `BACKEND_HIGHRATE_FLAG_WINDOW` gets the soft, reversible
 `accounts.flagged_high_rate_at` marker (set-once; a badge in the user list and a
 **Clear** action on the user card; never an automatic ban).
 
+The gateway also syncs its active IP bans (prod-only — see ARCHITECTURE §11) to
+`POST /api/v1/internal/bans/sync`; `internal/banview` mirrors them for the console's
+**Throttled** page (an **Active IP bans** panel with an **Unban** action) and returns
+the operator's pending unbans in the response, which the gateway applies on its next
+sync. Like `ratewatch` it is in-memory and resets on restart — the enforced ban lives
+in the gateway, not here.
+
 ## Package layout
 
 ```
@@ -134,8 +184,10 @@ internal/feedback/   # user feedback: messages + attachment (bytea), anti-spam g
 internal/lobby/      # auto-match (DB-backed open games + robot substitution) + friend-game invitations
 internal/robot/      # human-like robot opponent: account pool, seed-derived strategy, move driver
 internal/adminconsole/ # server-rendered admin console (Go templates + embedded CSS, view models), served at /_gm
-internal/connector/  # backend gRPC client to the Telegram connector (operator broadcasts)
+internal/ads/        # advertising banner: campaigns + bilingual messages + display timings, weighted-rotation feed (ActiveSet)
+internal/connector/  # backend gRPC client to the gateway bot-link relay (operator broadcasts)
 internal/ratewatch/  # gateway rate-limit reports: episode window for the console + the high-rate auto-flag
+internal/banview/    # gateway active-ban mirror: the console's Active IP bans panel + the operator unban backchannel
 ```
 
 ## Configuration (environment)
@@ -154,7 +206,7 @@ internal/ratewatch/  # gateway rate-limit reports: episode window for the consol
 | `BACKEND_OTEL_TRACES_EXPORTER` | `none` | `none`, `stdout` or `otlp` (gRPC; endpoint from the standard `OTEL_EXPORTER_OTLP_*`). |
 | `BACKEND_OTEL_METRICS_EXPORTER` | `none` | `none`, `stdout` or `otlp`. |
 | `BACKEND_DICT_DIR` | — | **Required.** Directory of committed `.dawg` dictionaries. |
-| `BACKEND_DICT_VERSION` | `v1` | Dictionary version new games pin. |
+| `BACKEND_DICT_VERSION` | `v1` | Version label for the flat dictionary dir. Recorded in a `.seed_version` marker on first boot and authoritative after: on a seeded volume a changed value is ignored (it seeds only a fresh volume) — the seed-drift guard (ARCHITECTURE.md §5). |
 | `BACKEND_GAME_TIMEOUT_SWEEP_INTERVAL` | `1m` | How often the turn-timeout sweeper runs. |
 | `BACKEND_GAME_CACHE_TTL` | `24h` | Idle window before a live game is evicted from cache. |
 | `BACKEND_LOBBY_ROBOT_WAIT` | `10s` | Auto-match wait before a robot is substituted for a missing human. |
@@ -165,7 +217,7 @@ internal/ratewatch/  # gateway rate-limit reports: episode window for the consol
 | `BACKEND_SMTP_USERNAME` | — | SMTP user; empty relays without authentication. |
 | `BACKEND_SMTP_PASSWORD` | — | SMTP password. |
 | `BACKEND_SMTP_FROM` | `no-reply@localhost` | Envelope/From address for confirm-codes. |
-| `BACKEND_CONNECTOR_ADDR` | — | Telegram connector gRPC address for admin-console operator broadcasts. Empty disables broadcasts. |
+| `BACKEND_CONNECTOR_ADDR` | — | the gateway bot-link relay gRPC address for admin-console operator broadcasts. Empty disables broadcasts. |
 | `BACKEND_GUEST_REAP_INTERVAL` | `1h` | How often the abandoned-guest reaper sweeps. |
 | `BACKEND_GUEST_RETENTION` | `720h` | Account age past which a guest with no game seat is deleted. |
 | `BACKEND_HIGHRATE_FLAG_THRESHOLD` | `1000` | Gateway-reported rejected calls within the window past which an account is soft-flagged. |
@@ -176,7 +228,7 @@ internal/ratewatch/  # gateway rate-limit reports: episode window for the consol
 ```sh
 docker run -d --name scrabble-pg -e POSTGRES_PASSWORD=dev -p 5432:5432 postgres:17-alpine
 # DAWGs: extract the dictionary release artifact (or point at a local scrabble-solver/dawg):
-mkdir -p /tmp/dawg && curl -fsSL https://gitea.iliadenisov.ru/developer/scrabble-dictionary/releases/download/v1.0.0/scrabble-dawg-v1.0.0.tar.gz | tar xz -C /tmp/dawg
+mkdir -p /tmp/dawg && curl -fsSL https://gitea.iliadenisov.ru/developer/scrabble-dictionary/releases/download/v1.3.0/scrabble-dawg-v1.3.0.tar.gz | tar xz -C /tmp/dawg
 BACKEND_POSTGRES_DSN='postgres://postgres:dev@localhost:5432/postgres?search_path=backend&sslmode=disable' \
   BACKEND_DICT_DIR=/tmp/dawg \
   GOPRIVATE='gitea.iliadenisov.ru/*' \
@@ -215,7 +267,14 @@ local solver co-development you may add a temporary replace — see `go.work`).
 from the [`scrabble-dictionary`](https://gitea.iliadenisov.ru/developer/scrabble-dictionary)
 repo (one semver per set); the engine loads them by `(variant, dict_version)` from
 `BACKEND_DICT_DIR`. The backend loads them at startup as a hard dependency
-(a missing dictionary aborts the boot).
+(a missing dictionary aborts the boot). The flat directory is the seed version,
+labelled `BACKEND_DICT_VERSION`; uploaded versions live in `<version>/`
+subdirectories the admin console writes and a restart re-loads. Because the DAWGs
+carry no embedded version, the first boot records the seed in a `.seed_version`
+marker that is authoritative after: on a seeded volume a changed `BACKEND_DICT_VERSION`
+is ignored (it seeds only a fresh volume) — the seed-drift guard — so a live contour's
+dictionary is changed through the console, never by bumping the build seed
+(ARCHITECTURE.md §5).
 
 ## Tests
 

backend/cmd/backend/main.go

@@ -3,8 +3,8 @@
 // loads the dictionaries into the engine registry, warms the session cache,
 // constructs the game domain and starts its turn-timeout sweeper, constructs the
 // lobby and social domains, then serves the HTTP listener with the infrastructure
-// probes and the /api/v1 route-group skeleton. Domain HTTP endpoints are added
-// with the gateway in a later stage described in PLAN.md.
+// probes and the /api/v1 route group, behind which the domains expose their HTTP
+// endpoints to the gateway.
 package main
 
 import (
@@ -15,10 +15,13 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/google/uuid"
 	"go.uber.org/zap"
 
 	"scrabble/backend/internal/account"
 	"scrabble/backend/internal/accountmerge"
+	"scrabble/backend/internal/ads"
+	"scrabble/backend/internal/banview"
 	"scrabble/backend/internal/config"
 	"scrabble/backend/internal/connector"
 	"scrabble/backend/internal/engine"
@@ -158,6 +161,15 @@ func run(ctx context.Context, cfg config.Config, logger *zap.Logger) error {
 		zap.Duration("interval", cfg.GuestReapInterval),
 		zap.Duration("retention", cfg.GuestRetention))
 
+	// Re-evaluate moderated-chat write access when a temporary block self-expires:
+	// no operator action fires then, so the sweeper emits the chat-access-changed
+	// event for lapsed blocks and the gateway re-pushes the chat-gate command.
+	chatSweeper := account.NewSuspensionSweeper(accounts, func(id uuid.UUID) {
+		hub.Publish(notify.ChatAccessChanged(id))
+	}, logger)
+	go chatSweeper.Run(ctx)
+	logger.Info("suspension expiry sweeper started", zap.Duration("interval", chatSweeper.Interval()))
+
 	// Lobby & social domains. Their REST and stream surface lives in the gateway,
 	// so they are handed to the server (like the route groups) for the handlers.
 	mailer := newMailer(cfg.SMTP, logger)
@@ -168,6 +180,15 @@ func run(ctx context.Context, cfg config.Config, logger *zap.Logger) error {
 	socialSvc := social.NewService(social.NewStore(db), accounts, games)
 	socialSvc.SetNotifier(hub)
 	socialSvc.SetMetrics(tel.MeterProvider().Meter("scrabble/backend/social"))
+	// A nudge the recipient answered by moving is marked read on the move path.
+	games.SetNudgeClearer(socialSvc.ClearNudges)
+	// Reap per-game disguised-robot friend requests once their game is long finished
+	// (the robot ignores them; the row only pins the in-game "request sent" state).
+	robotReqReaper := social.NewRobotFriendRequestReaper(socialSvc, logger)
+	go robotReqReaper.Run(ctx)
+	logger.Info("robot friend request reaper started",
+		zap.Duration("interval", robotReqReaper.Interval()),
+		zap.Duration("retention", robotReqReaper.Retention()))
 	feedbackSvc := feedback.NewService(feedback.NewStore(db), accounts)
 	feedbackSvc.SetNotifier(hub)
 
@@ -178,11 +199,15 @@ func run(ctx context.Context, cfg config.Config, logger *zap.Logger) error {
 	if err := robots.EnsurePool(ctx); err != nil {
 		return fmt.Errorf("provision robot pool: %w", err)
 	}
+	// Honest-AI fast path: a move in a vs_ai game triggers the robot's reply at once
+	// (the periodic driver below is the fallback). Set after the pool is provisioned.
+	games.SetAITrigger(robots.TriggerMove)
 	go robots.Run(ctx, cfg.Robot.DriveInterval)
 	logger.Info("robot driver started", zap.Duration("interval", cfg.Robot.DriveInterval))
 
 	matchmaker := lobby.NewMatchmaker(games, robots, cfg.Lobby.RobotWait, cfg.Lobby.RobotWaitJitter, logger)
 	matchmaker.SetNotifier(hub)
+	matchmaker.SetBlocker(socialSvc)
 	go matchmaker.RunReaper(ctx, cfg.Lobby.ReaperInterval)
 	invitations := lobby.NewInvitationService(lobby.NewStore(db), games, accounts, socialSvc)
 	invitations.SetNotifier(hub)
@@ -197,6 +222,14 @@ func run(ctx context.Context, cfg config.Config, logger *zap.Logger) error {
 		zap.Int("flag_threshold", cfg.RateWatch.FlagThreshold),
 		zap.Duration("flag_window", cfg.RateWatch.FlagWindow))
 
+	// Ban observability: mirror the gateway's active IP bans for the admin console's
+	// active-bans panel and collect operator unban requests.
+	banView := banview.New()
+
+	// Advertising-banner domain: campaign rotation feeding the profile.get banner
+	// block and the banner admin console section.
+	adsSvc := ads.NewService(ads.NewStore(db))
+
 	srv := server.New(cfg.HTTPAddr, server.Deps{
 		Logger:        logger,
 		DB:            db,
@@ -215,6 +248,9 @@ func run(ctx context.Context, cfg config.Config, logger *zap.Logger) error {
 		DictDir:       cfg.Game.DictDir,
 		Connector:     conn,
 		RateWatch:     rateWatch,
+		BanView:       banView,
+		Ads:           adsSvc,
+		Notifier:      hub,
 	})
 	pushSrv := pushgrpc.NewServer(cfg.GRPCAddr, hub, logger)
 

backend/internal/account/account.go

@@ -55,12 +55,12 @@ type Account struct {
 	HintBalance         int
 	BlockChat           bool
 	BlockFriendRequests bool
-	// ServiceLanguage is the language tag (en/ru) of the bot the account last
-	// authenticated through (its last Telegram ValidateInitData); it routes the
-	// account's out-of-app push back through the right bot. Empty when the account
-	// has never signed in through a tagged bot. Distinct from PreferredLanguage (the
-	// interface language) and from a game's variant language.
-	ServiceLanguage string
+	// VariantPreferences is the set of game variants (engine.Variant stable labels:
+	// "scrabble_en", "scrabble_ru", "erudit_ru") the player is willing to be matched
+	// into. It gates the New Game picker, the matchmaker and the friend-invite the
+	// player creates; an invited friend may still accept any variant. A new account
+	// defaults to Erudit only. Never empty — enforced on update and by a DB check.
+	VariantPreferences []string
 	// IsGuest marks an ephemeral guest account: a durable row with no identity,
 	// excluded from statistics, friends and history.
 	IsGuest bool
@@ -119,6 +119,16 @@ func (s *Store) ProvisionByIdentity(ctx context.Context, kind, externalID string
 	return s.provision(ctx, kind, externalID, provisionSeed{})
 }
 
+// ProvisionEmail returns the account owning the email identity externalID, creating
+// it (unconfirmed) on first contact with browserTZ — the client's detected "±HH:MM"
+// UTC offset — seeded into its time zone. Like ProvisionByIdentity it is race-safe
+// and leaves an existing account untouched, so a returning user's saved zone is never
+// overwritten. The email account is created here (the code-request step), not at the
+// later login, so this is where its zone is seeded.
+func (s *Store) ProvisionEmail(ctx context.Context, externalID, browserTZ string) (Account, error) {
+	return s.provision(ctx, KindEmail, externalID, provisionSeed{timeZone: seedZone(browserTZ)})
+}
+
 // ProvisionRobot provisions (or finds) the durable account backing a robot pool
 // member: a KindRobot identity carrying displayName, with chat blocked but friend
 // requests NOT blocked — a request to a robot is accepted as pending and, since the
@@ -151,14 +161,28 @@ func (s *Store) ProvisionRobot(ctx context.Context, externalID, displayName stri
 	return modelToAccount(row), nil
 }
 
-// ProvisionTelegram provisions (or finds) the account bound to a Telegram
-// identity. On first contact only, it seeds the new account's preferred language
-// from the Telegram client languageCode (when it maps to a supported language) and
-// its display name sanitized from firstName (falling back to username, then to a
-// generated placeholder when neither yields any letters); an already-existing
-// account is returned unchanged, so a later profile edit is never overwritten.
-func (s *Store) ProvisionTelegram(ctx context.Context, externalID, languageCode, username, firstName string) (Account, error) {
-	return s.provision(ctx, KindTelegram, externalID, telegramSeed(languageCode, username, firstName))
+// ProvisionTelegram provisions (or finds) the account bound to a Telegram identity,
+// reporting whether this call created it (first contact). On first contact only, it
+// seeds the new account's preferred language from the Telegram client languageCode
+// (when it maps to a supported language) and its display name sanitized from firstName
+// (falling back to username, then to a generated placeholder when neither yields any
+// letters); an already-existing account is returned unchanged, so a later profile edit
+// is never overwritten. The created flag lets the auth handler re-evaluate moderated-
+// chat write access on first registration — the path of a user who joined the chat
+// before registering, whom no chat_member event covers.
+func (s *Store) ProvisionTelegram(ctx context.Context, externalID, languageCode, username, firstName, browserTZ string) (Account, bool, error) {
+	// Pre-check whether the identity already exists so the caller can act on first
+	// contact. A race with a concurrent create only over- or under-reports created for
+	// that one call, which the idempotent chat-access re-evaluation tolerates.
+	_, err := s.findByIdentity(ctx, KindTelegram, externalID)
+	created := errors.Is(err, ErrNotFound)
+	if err != nil && !created {
+		return Account{}, false, err
+	}
+	seed := telegramSeed(languageCode, username, firstName)
+	seed.timeZone = seedZone(browserTZ)
+	acc, err := s.provision(ctx, KindTelegram, externalID, seed)
+	return acc, created, err
 }
 
 // provision finds the account for (kind, externalID) or creates it with seed,
@@ -185,20 +209,33 @@ func (s *Store) provision(ctx context.Context, kind, externalID string, seed pro
 }
 
 // provisionSeed carries the optional create-time profile seed for a brand-new
-// account (Telegram first contact). Empty fields fall back to the accounts table
-// defaults, so an unknown language keeps the 'en' default and an empty name keeps
-// the ” default.
+// account (first contact). Empty fields fall back to the accounts table defaults,
+// so an unknown language keeps the 'en' default, an empty name keeps the ” default
+// and an empty time zone keeps the 'UTC' default.
 type provisionSeed struct {
 	preferredLanguage string
 	displayName       string
+	timeZone          string
+}
+
+// seedZone returns browserTZ when it is a well-formed zone to persist at account
+// creation (a "±HH:MM" offset or a loadable IANA name), else "" so the new account
+// falls back to the accounts table's 'UTC' default. The client reports the device's
+// detected offset deterministically; a bad value is dropped rather than guessed at.
+func seedZone(browserTZ string) string {
+	if validZone(browserTZ) {
+		return browserTZ
+	}
+	return ""
 }
 
 // telegramSeed derives the create-time seed from Telegram launch fields: a
 // supported preferred language from languageCode (an ISO-639 code, possibly
-// region-tagged like "ru-RU"), and a display name sanitized from firstName or,
-// failing that, username (sanitizeDisplayName strips disallowed characters to the
-// editable format). When neither yields any letters, it falls back to a generated
-// placeholder in the seeded language (placeholderDisplayName).
+// region-tagged like "ru-RU"), and a display name. The name precedence is the real
+// name (firstName, sanitized to the editable format) → the @username taken verbatim
+// (already a valid handle, only trimmed and length-capped, never character-stripped)
+// → a generated placeholder in the seeded language (placeholderDisplayName), reached
+// only when firstName has no usable letters and no username is set.
 func telegramSeed(languageCode, username, firstName string) provisionSeed {
 	var seed provisionSeed
 	if lang, _, _ := strings.Cut(strings.ToLower(strings.TrimSpace(languageCode)), "-"); lang == "en" || lang == "ru" {
@@ -206,7 +243,13 @@ func telegramSeed(languageCode, username, firstName string) provisionSeed {
 	}
 	name := sanitizeDisplayName(firstName)
 	if name == "" {
-		name = sanitizeDisplayName(username)
+		// The real name yielded nothing usable: fall back to the @username verbatim
+		// (Telegram guarantees a valid handle), only trimmed and capped to the column
+		// width — never character-stripped like the real name.
+		name = strings.TrimSpace(username)
+		if r := []rune(name); len(r) > maxDisplayName {
+			name = strings.TrimRight(string(r[:maxDisplayName]), " ")
+		}
 	}
 	if name == "" {
 		name = placeholderDisplayName(seed.preferredLanguage)
@@ -303,6 +346,14 @@ func (s *Store) CountAccounts(ctx context.Context) (int, error) {
 	return int(dest.Count), nil
 }
 
+// AccountByIdentity returns the account bound to (kind, externalID), or ErrNotFound
+// when none exists. Unlike ProvisionByIdentity it never creates one: the chat-access
+// resolver uses it to tell a registered Telegram user (eligible to be granted chat
+// write access) from an unregistered one (left muted).
+func (s *Store) AccountByIdentity(ctx context.Context, kind, externalID string) (Account, error) {
+	return s.findByIdentity(ctx, kind, externalID)
+}
+
 // findByIdentity joins identities to accounts and returns the matching account,
 // or ErrNotFound.
 func (s *Store) findByIdentity(ctx context.Context, kind, externalID string) (Account, error) {
@@ -341,16 +392,22 @@ func (s *Store) create(ctx context.Context, kind, externalID string, seed provis
 
 	var created Account
 	err = withTx(ctx, s.db, func(tx *sql.Tx) error {
-		// Seed the new row's display name and language (Telegram first contact); an
-		// empty seed reproduces the table defaults ('' and 'en') the other callers
-		// relied on, so their behaviour is unchanged.
+		// Seed the new row's display name, language and time zone (first contact); an
+		// empty seed reproduces the table defaults ('', 'en' and 'UTC') the other callers
+		// relied on, so their behaviour is unchanged. time_zone is written explicitly (the
+		// detected offset, or 'UTC' equal to the column default) so a seeded zone lands at
+		// creation while an unseeded one stays UTC.
 		lang := seed.preferredLanguage
 		if lang == "" {
 			lang = "en"
 		}
+		tz := seed.timeZone
+		if tz == "" {
+			tz = "UTC"
+		}
 		insertAccount := table.Accounts.
-			INSERT(table.Accounts.AccountID, table.Accounts.DisplayName, table.Accounts.PreferredLanguage).
-			VALUES(accountID, seed.displayName, lang).
+			INSERT(table.Accounts.AccountID, table.Accounts.DisplayName, table.Accounts.PreferredLanguage, table.Accounts.TimeZone).
+			VALUES(accountID, seed.displayName, lang, tz).
 			RETURNING(table.Accounts.AllColumns)
 
 		var row model.Accounts
@@ -389,15 +446,21 @@ const guestDisplayName = "Guest"
 // ProvisionGuest creates a fresh ephemeral guest account: a durable row carrying
 // no identity, flagged is_guest, so it can hold a session and a game seat (both
 // foreign-key the accounts table) while being excluded from statistics, friends
-// and history. Guests are not reused — each bootstrap mints a new account.
-func (s *Store) ProvisionGuest(ctx context.Context) (Account, error) {
+// and history. Guests are not reused — each bootstrap mints a new account. browserTZ
+// (the client's detected "±HH:MM" UTC offset) seeds the guest's time zone, falling
+// back to the 'UTC' default when empty or malformed.
+func (s *Store) ProvisionGuest(ctx context.Context, browserTZ string) (Account, error) {
 	accountID, err := uuid.NewV7()
 	if err != nil {
 		return Account{}, fmt.Errorf("account: new guest id: %w", err)
 	}
+	tz := seedZone(browserTZ)
+	if tz == "" {
+		tz = "UTC"
+	}
 	stmt := table.Accounts.
-		INSERT(table.Accounts.AccountID, table.Accounts.DisplayName, table.Accounts.IsGuest).
-		VALUES(accountID, guestDisplayName, true).
+		INSERT(table.Accounts.AccountID, table.Accounts.DisplayName, table.Accounts.IsGuest, table.Accounts.TimeZone).
+		VALUES(accountID, guestDisplayName, true, tz).
 		RETURNING(table.Accounts.AllColumns)
 
 	var row model.Accounts
@@ -491,36 +554,12 @@ func (s *Store) ClearHighRateFlag(ctx context.Context, id uuid.UUID) error {
 	return nil
 }
 
-// SetServiceLanguage records the service language (en/ru) of the bot a Telegram
-// user authenticated through. It is called on every Telegram login — new and
-// existing accounts — so it tracks the bot the user last came through (last-login-
-// wins), and the out-of-app push routes by it. It is a no-op for an empty language
-// (a non-Telegram login carries none) and does not bump updated_at (an infra
-// routing field, not a user profile edit).
-func (s *Store) SetServiceLanguage(ctx context.Context, id uuid.UUID, language string) error {
-	if language == "" {
-		return nil
-	}
-	stmt := table.Accounts.
-		UPDATE(table.Accounts.ServiceLanguage).
-		SET(postgres.String(language)).
-		WHERE(table.Accounts.AccountID.EQ(postgres.UUID(id)))
-	if _, err := stmt.ExecContext(ctx, s.db); err != nil {
-		return fmt.Errorf("account: set service language %s: %w", id, err)
-	}
-	return nil
-}
-
 // modelToAccount projects a generated model row into the public Account struct.
 func modelToAccount(row model.Accounts) Account {
 	var mergedInto uuid.UUID
 	if row.MergedInto != nil {
 		mergedInto = *row.MergedInto
 	}
-	var serviceLanguage string
-	if row.ServiceLanguage != nil {
-		serviceLanguage = *row.ServiceLanguage
-	}
 	var flaggedHighRateAt time.Time
 	if row.FlaggedHighRateAt != nil {
 		flaggedHighRateAt = *row.FlaggedHighRateAt
@@ -529,7 +568,7 @@ func modelToAccount(row model.Accounts) Account {
 		ID:                     row.AccountID,
 		DisplayName:            row.DisplayName,
 		PreferredLanguage:      row.PreferredLanguage,
-		ServiceLanguage:        serviceLanguage,
+		VariantPreferences:     []string(row.VariantPreferences),
 		TimeZone:               row.TimeZone,
 		AwayStart:              row.AwayStart,
 		AwayEnd:                row.AwayEnd,

backend/internal/account/email.go

@@ -131,13 +131,15 @@ func (s *EmailService) ConfirmCode(ctx context.Context, accountID uuid.UUID, ema
 // the unauthenticated email-login entry point and, unlike RequestCode,
 // does not refuse an already-confirmed email — that is the ordinary returning-user
 // login. The code is mailed to the address, so only its real owner can complete
-// the login. It returns the target account id for the subsequent LoginWithCode.
-func (s *EmailService) RequestLoginCode(ctx context.Context, email string) (uuid.UUID, error) {
+// the login. On first contact browserTZ (the client's detected "±HH:MM" UTC offset)
+// seeds the new account's time zone. It returns the target account id for the
+// subsequent LoginWithCode.
+func (s *EmailService) RequestLoginCode(ctx context.Context, email, browserTZ string) (uuid.UUID, error) {
 	addr, err := normalizeEmail(email)
 	if err != nil {
 		return uuid.UUID{}, err
 	}
-	acc, err := s.store.ProvisionByIdentity(ctx, KindEmail, addr)
+	acc, err := s.store.ProvisionEmail(ctx, addr, browserTZ)
 	if err != nil {
 		return uuid.UUID{}, err
 	}

backend/internal/account/profile.go

@@ -14,6 +14,7 @@ import (
 	"github.com/go-jet/jet/v2/postgres"
 	"github.com/go-jet/jet/v2/qrm"
 	"github.com/google/uuid"
+	"github.com/lib/pq"
 
 	"scrabble/backend/internal/postgres/jet/backend/model"
 	"scrabble/backend/internal/postgres/jet/backend/table"
@@ -23,9 +24,10 @@ import (
 // is unbounded; auto-provisioned platform names bypass this editor validation).
 const maxDisplayName = 32
 
-// maxDisplayNameSpecials caps the total special characters (the "." / "_" separators —
-// every name rune that is neither a letter nor a space) an editable display name may
-// carry, so a still-well-formed name cannot be made of mostly punctuation.
+// maxDisplayNameSpecials caps the total special characters (every name rune that is
+// neither a letter, a space, nor a digit — i.e. the "." / "_" separators) an editable
+// display name may carry, so a still-well-formed name cannot be made of mostly
+// punctuation. A trailing digit run is bounded separately by displayNameRe.
 const maxDisplayNameSpecials = 5
 
 // maxAwayWindow bounds the daily away window's duration (midnight-wrap aware).
@@ -34,9 +36,11 @@ const maxAwayWindow = 12 * time.Hour
 // displayNameRe enforces the editable display-name format: Unicode letters
 // joined by single space / "." / "_" separators, where a "." or "_" may be followed
 // by a single space. No leading separator and no two adjacent separators (except
-// "<dot|underscore> <space>"); a single trailing "." is allowed, so
-// "Name_P. Last" and "Anna B." are valid, "Name P._Last" is not.
-var displayNameRe = regexp.MustCompile(`^\p{L}+(?:(?:[._] ?| )\p{L}+)*\.?$`)
+// "<dot|underscore> <space>"). The name may end with EITHER a single trailing "."
+// (an initial, "Anna B.") OR a run of 1–5 digits (a handle's number or year,
+// "Player2007"), but not both; digits never appear elsewhere. So "Name_P. Last",
+// "Anna B." and "Аня2007" are valid, while "Name P._Last" and "Dark2Wolf" are not.
+var displayNameRe = regexp.MustCompile(`^\p{L}+(?:(?:[._] ?| )\p{L}+)*(?:\.|[0-9]{1,5})?$`)
 
 // ErrInvalidProfile is returned when a profile update carries an unacceptable
 // field (an unknown language, an invalid timezone, or an over-long display name).
@@ -55,6 +59,46 @@ type ProfileUpdate struct {
 	BlockChat              bool
 	BlockFriendRequests    bool
 	NotificationsInAppOnly bool
+	// VariantPreferences is the set of game variants the player allows themselves to
+	// be matched into (engine.Variant stable labels). UpdateProfile cleans it to a
+	// deduplicated, canonically ordered subset of the known variants and rejects an
+	// empty set.
+	VariantPreferences []string
+}
+
+// knownVariants is the closed set of game-variant labels (engine.Variant stable
+// labels) a profile's variant preferences may contain. It lives here so the store
+// does not depend on the engine package; the server handler additionally validates
+// against engine.ParseVariant, and a DB check enforces the same subset.
+var knownVariants = map[string]bool{"erudit_ru": true, "scrabble_ru": true, "scrabble_en": true}
+
+// canonicalVariantOrder is the deterministic order variant preferences are stored
+// in (Erudit, Russian Scrabble, English), independent of the client's order.
+var canonicalVariantOrder = []string{"erudit_ru", "scrabble_ru", "scrabble_en"}
+
+// validateVariantPreferences cleans a profile's variant-preference set: it drops
+// duplicates, rejects an unknown label or an empty set (ErrInvalidProfile) and
+// returns the preferences in canonicalVariantOrder so the stored value is
+// deterministic regardless of the order the client sent.
+func validateVariantPreferences(prefs []string) ([]string, error) {
+	seen := make(map[string]bool, len(prefs))
+	for _, p := range prefs {
+		p = strings.TrimSpace(p)
+		if !knownVariants[p] {
+			return nil, fmt.Errorf("%w: variant preference %q", ErrInvalidProfile, p)
+		}
+		seen[p] = true
+	}
+	if len(seen) == 0 {
+		return nil, fmt.Errorf("%w: variant preferences must not be empty", ErrInvalidProfile)
+	}
+	out := make([]string, 0, len(seen))
+	for _, v := range canonicalVariantOrder {
+		if seen[v] {
+			out = append(out, v)
+		}
+	}
+	return out, nil
 }
 
 // UpdateProfile validates and overwrites the editable fields of the account, then
@@ -76,17 +120,26 @@ func (s *Store) UpdateProfile(ctx context.Context, id uuid.UUID, p ProfileUpdate
 	if err := validateAwayWindow(p.AwayStart, p.AwayEnd); err != nil {
 		return Account{}, err
 	}
+	prefs, err := validateVariantPreferences(p.VariantPreferences)
+	if err != nil {
+		return Account{}, err
+	}
 
 	stmt := table.Accounts.UPDATE(
 		table.Accounts.DisplayName, table.Accounts.PreferredLanguage, table.Accounts.TimeZone,
 		table.Accounts.AwayStart, table.Accounts.AwayEnd,
 		table.Accounts.BlockChat, table.Accounts.BlockFriendRequests,
-		table.Accounts.NotificationsInAppOnly, table.Accounts.UpdatedAt,
+		table.Accounts.NotificationsInAppOnly, table.Accounts.VariantPreferences,
+		table.Accounts.UpdatedAt,
 	).SET(
 		postgres.String(name), postgres.String(lang), postgres.String(tz),
 		postgres.TimeT(p.AwayStart), postgres.TimeT(p.AwayEnd),
 		postgres.Bool(p.BlockChat), postgres.Bool(p.BlockFriendRequests),
-		postgres.Bool(p.NotificationsInAppOnly), postgres.TimestampzT(time.Now().UTC()),
+		postgres.Bool(p.NotificationsInAppOnly),
+		// prefs are validated against the closed knownVariants set; bind as a text[]
+		// parameter (lib/pq encodes the array, the cast pins the column type).
+		postgres.Raw("#variant_prefs::text[]", map[string]interface{}{"#variant_prefs": pq.StringArray(prefs)}),
+		postgres.TimestampzT(time.Now().UTC()),
 	).WHERE(table.Accounts.AccountID.EQ(postgres.UUID(id))).
 		RETURNING(table.Accounts.AllColumns)
 
@@ -117,7 +170,7 @@ func ValidateDisplayName(raw string) (string, error) {
 	}
 	specials := 0
 	for _, r := range name {
-		if r != ' ' && !unicode.IsLetter(r) {
+		if r != ' ' && !unicode.IsLetter(r) && !unicode.IsDigit(r) {
 			specials++
 		}
 	}

backend/internal/account/profile_test.go

@@ -3,6 +3,7 @@ package account
 import (
 	"context"
 	"errors"
+	"slices"
 	"strings"
 	"testing"
 	"time"
@@ -16,7 +17,7 @@ import (
 // offset/IANA timezone), not just their unit tests in validate_test.go.
 func TestUpdateProfileValidation(t *testing.T) {
 	s := &Store{}
-	base := ProfileUpdate{DisplayName: "Kaya", PreferredLanguage: "en", TimeZone: "UTC"}
+	base := ProfileUpdate{DisplayName: "Kaya", PreferredLanguage: "en", TimeZone: "UTC", VariantPreferences: []string{"erudit_ru"}}
 	hm := func(h, m int) time.Time { return time.Date(0, 1, 1, h, m, 0, 0, time.UTC) }
 	tests := []struct {
 		name string
@@ -28,6 +29,8 @@ func TestUpdateProfileValidation(t *testing.T) {
 		{"over-long name", func(p *ProfileUpdate) { p.DisplayName = strings.Repeat("x", maxDisplayName+1) }},
 		{"bad name layout", func(p *ProfileUpdate) { p.DisplayName = "Bad__Name" }},
 		{"away over 12h", func(p *ProfileUpdate) { p.AwayStart, p.AwayEnd = hm(8, 0), hm(21, 0) }},
+		{"empty variant preferences", func(p *ProfileUpdate) { p.VariantPreferences = nil }},
+		{"unknown variant preference", func(p *ProfileUpdate) { p.VariantPreferences = []string{"chess"} }},
 	}
 	for _, tc := range tests {
 		t.Run(tc.name, func(t *testing.T) {
@@ -39,3 +42,22 @@ func TestUpdateProfileValidation(t *testing.T) {
 		})
 	}
 }
+
+// TestValidateVariantPreferences checks the cleaning of a profile's variant set:
+// duplicates collapse, the result is canonically ordered (Erudit, Russian Scrabble,
+// English) regardless of input order, and an empty or unknown set is rejected.
+func TestValidateVariantPreferences(t *testing.T) {
+	got, err := validateVariantPreferences([]string{"scrabble_en", "erudit_ru", "scrabble_en"})
+	if err != nil {
+		t.Fatalf("validate: %v", err)
+	}
+	if want := []string{"erudit_ru", "scrabble_en"}; !slices.Equal(got, want) {
+		t.Fatalf("got %v, want %v", got, want)
+	}
+	if _, err := validateVariantPreferences(nil); !errors.Is(err, ErrInvalidProfile) {
+		t.Fatalf("empty err = %v, want ErrInvalidProfile", err)
+	}
+	if _, err := validateVariantPreferences([]string{"chess"}); !errors.Is(err, ErrInvalidProfile) {
+		t.Fatalf("unknown err = %v, want ErrInvalidProfile", err)
+	}
+}

backend/internal/account/provision_test.go

@@ -9,8 +9,9 @@ import (
 
 // TestTelegramSeed covers the pure mapping from Telegram launch fields to the
 // create-time account seed: supported-language detection (bare and region-tagged),
-// the first-name / username display-name precedence, and the sanitization that
-// strips disallowed characters (emoji, digits, punctuation) to the editable format.
+// the real-name → @username (verbatim) → placeholder display-name precedence, and
+// the sanitization of the real name (emoji, digits, punctuation stripped to the
+// editable format). The username, when used, is kept verbatim.
 func TestTelegramSeed(t *testing.T) {
 	cases := map[string]struct {
 		languageCode, username, firstName string
@@ -28,6 +29,7 @@ func TestTelegramSeed(t *testing.T) {
 		"punct to space":      {"en", "user", "John❤Doe", "en", "John Doe"},
 		"digits dropped":      {"ru", "user", "Маша123", "ru", "Маша"},
 		"garbage to username": {"en", "good", "123!@#", "en", "good"},
+		"username verbatim":   {"en", "co_ol99", "🎮🎮", "en", "co_ol99"},
 	}
 	for name, tc := range cases {
 		t.Run(name, func(t *testing.T) {
@@ -49,10 +51,10 @@ func TestTelegramSeedPlaceholder(t *testing.T) {
 		languageCode, username, firstName string
 		wantRe                            string
 	}{
-		"en empty":     {"en", "", "", `^Player-\d{5}$`},
-		"ru empty":     {"ru", "", "", `^Игрок-\d{5}$`},
-		"default en":   {"fr", "", "", `^Player-\d{5}$`},
-		"both garbage": {"ru", "123", "!!!", `^Игрок-\d{5}$`},
+		"en empty":                  {"en", "", "", `^Player-\d{5}$`},
+		"ru empty":                  {"ru", "", "", `^Игрок-\d{5}$`},
+		"default en":                {"fr", "", "", `^Player-\d{5}$`},
+		"name garbage, no username": {"ru", "", "!!!", `^Игрок-\d{5}$`},
 	}
 	for name, tc := range cases {
 		t.Run(name, func(t *testing.T) {

backend/internal/account/roles.go

@@ -19,11 +19,24 @@ const (
 	// RoleFeedbackBanned forbids the account from submitting feedback (only that;
 	// it is not a full account suspension). See internal/feedback.
 	RoleFeedbackBanned = "feedback_banned"
+
+	// RoleNoBanner suppresses the in-app advertising banner for the account
+	// unconditionally, overriding the usual eligibility (a free account with an
+	// empty hint wallet otherwise sees it). See internal/ads.
+	RoleNoBanner = "no_banner"
+
+	// RoleChatMuted forbids the account from writing in the moderated Telegram
+	// discussion chat, without otherwise restricting the game (the chat-only
+	// counterpart to a full account suspension). It is one input to the chat-access
+	// gate; an active admin suspension mutes the player regardless, so this role only
+	// matters for an account that is not suspended. Granting or revoking it re-pushes
+	// the chat-gate command for a member currently in the chat.
+	RoleChatMuted = "chat_muted"
 )
 
 // KnownRoles is the set of roles the console may grant or revoke; an operator
 // cannot assign an unrecognised role.
-var KnownRoles = []string{RoleFeedbackBanned}
+var KnownRoles = []string{RoleFeedbackBanned, RoleNoBanner, RoleChatMuted}
 
 // IsKnownRole reports whether role is a recognised account role.
 func IsKnownRole(role string) bool {

backend/internal/account/stats.go

@@ -2,6 +2,7 @@ package account
 
 import (
 	"context"
+	"encoding/json"
 	"errors"
 	"fmt"
 
@@ -13,16 +14,43 @@ import (
 	"scrabble/backend/internal/postgres/jet/backend/table"
 )
 
+// BestMoveTile is one letter cell of a best-move word: its concrete letter (the
+// designated letter for a blank), its tile point value (0 for a blank) and whether it
+// is a blank. It is the persisted/served shape: the game domain marshals a slice of
+// these into account_best_move.tiles, and the statistics screen renders them as game
+// tiles without consulting the variant's alphabet.
+type BestMoveTile struct {
+	Letter string `json:"letter"`
+	Value  int    `json:"value"`
+	Blank  bool   `json:"blank"`
+}
+
+// BestMove is an account's highest-scoring single play within one game variant: the
+// move's total score (every word it formed plus the all-tiles bonus, matching
+// MaxWordPoints) and its main word as an ordered slice of tiles.
+type BestMove struct {
+	Variant string
+	Score   int
+	Tiles   []BestMoveTile
+}
+
 // Stats is a durable account's lifetime record, written by the game domain on each
 // finish and read for the player's statistics screen. MaxGamePoints is the best
 // single game's total; MaxWordPoints is the best single move's score (which already
-// includes every word it formed plus the all-tiles bonus).
+// includes every word it formed plus the all-tiles bonus). BestMoves holds the same
+// best move broken down per variant, with the word itself — empty for an account with
+// no recorded play yet, and never carrying a variant the account has not played.
 type Stats struct {
 	Wins          int
 	Losses        int
 	Draws         int
 	MaxGamePoints int
 	MaxWordPoints int
+	// Moves is the lifetime count of the account's plays (tile placements); HintsUsed is the
+	// lifetime count of hints taken. The statistics screen shows the hint share (HintsUsed / Moves).
+	Moves     int
+	HintsUsed int
+	BestMoves []BestMove
 }
 
 // GetStats returns the lifetime statistics for id. An account with no account_stats
@@ -40,11 +68,48 @@ func (s *Store) GetStats(ctx context.Context, id uuid.UUID) (Stats, error) {
 		}
 		return Stats{}, fmt.Errorf("account: get stats %s: %w", id, err)
 	}
+	best, err := s.bestMoves(ctx, id)
+	if err != nil {
+		return Stats{}, err
+	}
 	return Stats{
 		Wins:          int(row.Wins),
 		Losses:        int(row.Losses),
 		Draws:         int(row.Draws),
 		MaxGamePoints: int(row.MaxGamePoints),
 		MaxWordPoints: int(row.MaxWordPoints),
+		Moves:         int(row.Moves),
+		HintsUsed:     int(row.HintsUsed),
+		BestMoves:     best,
 	}, nil
 }
+
+// bestMoves reads an account's per-variant best moves, ordered by variant for a stable
+// response. Each row's tiles JSON is decoded into the served BestMoveTile slice. An
+// account with no recorded play yields an empty (nil) slice rather than an error.
+func (s *Store) bestMoves(ctx context.Context, id uuid.UUID) ([]BestMove, error) {
+	stmt := postgres.SELECT(
+		table.AccountBestMove.Variant,
+		table.AccountBestMove.Score,
+		table.AccountBestMove.Tiles,
+	).
+		FROM(table.AccountBestMove).
+		WHERE(table.AccountBestMove.AccountID.EQ(postgres.UUID(id))).
+		ORDER_BY(table.AccountBestMove.Variant.ASC())
+	var rows []model.AccountBestMove
+	if err := stmt.QueryContext(ctx, s.db, &rows); err != nil {
+		if errors.Is(err, qrm.ErrNoRows) {
+			return nil, nil
+		}
+		return nil, fmt.Errorf("account: best moves %s: %w", id, err)
+	}
+	out := make([]BestMove, 0, len(rows))
+	for _, r := range rows {
+		var tiles []BestMoveTile
+		if err := json.Unmarshal([]byte(r.Tiles), &tiles); err != nil {
+			return nil, fmt.Errorf("account: decode best-move tiles %s/%s: %w", id, r.Variant, err)
+		}
+		out = append(out, BestMove{Variant: r.Variant, Score: int(r.Score), Tiles: tiles})
+	}
+	return out, nil
+}

backend/internal/account/suspension.go

@@ -161,6 +161,31 @@ func (s *Store) queryCurrentSuspension(ctx context.Context, accountID uuid.UUID,
 	return modelToSuspension(row), true, nil
 }
 
+// SuspensionsExpiredBetween returns the distinct account ids whose temporary block lapsed in the
+// half-open window (since, until]: a non-lifted suspension with a blocked_until in that range. The
+// chat-access sweeper uses it to re-evaluate chat write access when a temporary block self-expires,
+// since no operator action fires then. An account that still has another active block may be
+// included; the eligibility resolver returns the true state, so emitting for it is harmless.
+func (s *Store) SuspensionsExpiredBetween(ctx context.Context, since, until time.Time) ([]uuid.UUID, error) {
+	rows, err := s.db.QueryContext(ctx,
+		`SELECT DISTINCT account_id FROM backend.account_suspensions
+		 WHERE lifted_at IS NULL AND blocked_until > $1 AND blocked_until <= $2`,
+		since.UTC(), until.UTC())
+	if err != nil {
+		return nil, fmt.Errorf("account: suspensions expired between: %w", err)
+	}
+	defer rows.Close()
+	var out []uuid.UUID
+	for rows.Next() {
+		var id uuid.UUID
+		if err := rows.Scan(&id); err != nil {
+			return nil, fmt.Errorf("account: scan expired suspension: %w", err)
+		}
+		out = append(out, id)
+	}
+	return out, rows.Err()
+}
+
 // invalidateSuspension drops the account's cached block so the next CurrentSuspension re-reads it.
 // Called after Suspend and LiftSuspension.
 func (s *Store) invalidateSuspension(accountID uuid.UUID) {

backend/internal/account/suspension_sweeper.go

@@ -0,0 +1,84 @@
+package account
+
+import (
+	"context"
+	"time"
+
+	"github.com/google/uuid"
+	"go.uber.org/zap"
+)
+
+// suspensionSweepInterval is how often the sweeper re-checks for temporary blocks
+// that lapsed. A minute is well under the coarsest block grain (operators pick day
+// presets) while keeping the query trivial.
+const suspensionSweepInterval = time.Minute
+
+// suspensionExpiryQuerier is the slice of the account store the sweeper depends on:
+// the accounts whose temporary block lapsed in a window. *Store satisfies it; a fake
+// drives the sweeper's unit tests.
+type suspensionExpiryQuerier interface {
+	SuspensionsExpiredBetween(ctx context.Context, since, until time.Time) ([]uuid.UUID, error)
+}
+
+// SuspensionSweeper re-evaluates chat write access when a temporary block self-
+// expires. No operator action fires on expiry — the suspension gate just re-reads
+// the wall clock — so without this a temporarily blocked player would stay muted in
+// the moderated discussion chat after their block lapsed. Each tick it finds blocks
+// that expired since the previous tick and calls onExpire for the affected accounts;
+// onExpire is wired to publish the chat-access-changed event, after which the gateway
+// re-resolves the true eligibility. A liberal call (an account that still has another
+// active block) is therefore harmless. The window is in-memory, so a block that
+// expires while the process is down is not re-granted until the next operator action
+// or the player rejoins — an accepted best-effort gap.
+type SuspensionSweeper struct {
+	store    suspensionExpiryQuerier
+	onExpire func(accountID uuid.UUID)
+	log      *zap.Logger
+	// since is the upper bound of the previous swept window; the next sweep covers
+	// (since, now]. It advances only on a successful query, so a failed tick retries
+	// the same window rather than dropping expiries.
+	since time.Time
+}
+
+// NewSuspensionSweeper builds the sweeper over the account store, the per-account
+// expiry callback (publishing the chat-access-changed event) and a logger. The first
+// window opens at construction time, so blocks that lapsed earlier are not re-emitted.
+func NewSuspensionSweeper(store *Store, onExpire func(accountID uuid.UUID), log *zap.Logger) *SuspensionSweeper {
+	if log == nil {
+		log = zap.NewNop()
+	}
+	return &SuspensionSweeper{store: store, onExpire: onExpire, log: log, since: time.Now().UTC()}
+}
+
+// Interval reports the sweep cadence, for the startup log line.
+func (w *SuspensionSweeper) Interval() time.Duration { return suspensionSweepInterval }
+
+// Run sweeps every Interval until ctx is cancelled.
+func (w *SuspensionSweeper) Run(ctx context.Context) {
+	ticker := time.NewTicker(suspensionSweepInterval)
+	defer ticker.Stop()
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-ticker.C:
+			w.sweep(ctx)
+		}
+	}
+}
+
+// sweep emits a chat-access-changed signal for every account whose temporary block
+// lapsed in (since, now], then advances the window. On a query error it keeps the
+// window so the next tick retries it.
+func (w *SuspensionSweeper) sweep(ctx context.Context) {
+	now := time.Now().UTC()
+	ids, err := w.store.SuspensionsExpiredBetween(ctx, w.since, now)
+	if err != nil {
+		w.log.Warn("suspension expiry sweep failed", zap.Error(err))
+		return
+	}
+	w.since = now
+	for _, id := range ids {
+		w.onExpire(id)
+	}
+}

backend/internal/account/suspension_sweeper_test.go

@@ -0,0 +1,80 @@
+package account
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"go.uber.org/zap"
+)
+
+// fakeExpiryQuerier records the `since` bound of each call and replays a scripted
+// result/error per call, so the sweeper's window and dispatch logic is testable
+// without a database.
+type fakeExpiryQuerier struct {
+	results [][]uuid.UUID
+	errs    []error
+	sinces  []time.Time
+	idx     int
+}
+
+func (f *fakeExpiryQuerier) SuspensionsExpiredBetween(_ context.Context, since, _ time.Time) ([]uuid.UUID, error) {
+	f.sinces = append(f.sinces, since)
+	i := f.idx
+	f.idx++
+	if i < len(f.errs) && f.errs[i] != nil {
+		return nil, f.errs[i]
+	}
+	if i < len(f.results) {
+		return f.results[i], nil
+	}
+	return nil, nil
+}
+
+func newSweeper(store suspensionExpiryQuerier, onExpire func(uuid.UUID)) *SuspensionSweeper {
+	return &SuspensionSweeper{
+		store:    store,
+		onExpire: onExpire,
+		log:      zap.NewNop(),
+		since:    time.Now().Add(-time.Minute).UTC(),
+	}
+}
+
+func TestSuspensionSweeperDispatchesAndAdvances(t *testing.T) {
+	id1, id2 := uuid.New(), uuid.New()
+	fake := &fakeExpiryQuerier{results: [][]uuid.UUID{{id1, id2}, nil}}
+	var got []uuid.UUID
+	w := newSweeper(fake, func(id uuid.UUID) { got = append(got, id) })
+
+	first := w.since
+	w.sweep(context.Background())
+	assert.Equal(t, []uuid.UUID{id1, id2}, got, "every expired account is dispatched")
+	assert.True(t, w.since.After(first), "the window advances on success")
+
+	// A second sweep opens the next window at the previous upper bound.
+	prev := w.since
+	w.sweep(context.Background())
+	require.Len(t, fake.sinces, 2)
+	assert.True(t, fake.sinces[1].After(fake.sinces[0]), "consecutive windows are contiguous and forward")
+	assert.True(t, fake.sinces[1].Equal(prev), "the next window starts at the previous upper bound")
+}
+
+func TestSuspensionSweeperKeepsWindowOnError(t *testing.T) {
+	fake := &fakeExpiryQuerier{errs: []error{errors.New("db down")}}
+	w := newSweeper(fake, func(uuid.UUID) { t.Fatal("onExpire must not run when the query fails") })
+
+	before := w.since
+	w.sweep(context.Background())
+	assert.True(t, w.since.Equal(before), "the window is retained on error so the next tick retries it")
+}
+
+func TestNewSuspensionSweeperDefaults(t *testing.T) {
+	w := NewSuspensionSweeper(nil, func(uuid.UUID) {}, nil)
+	assert.Equal(t, time.Minute, w.Interval())
+	assert.NotNil(t, w.log, "a nil logger is tolerated")
+	assert.WithinDuration(t, time.Now().UTC(), w.since, time.Second, "the first window opens at construction time")
+}

backend/internal/account/validate_test.go

@@ -24,7 +24,16 @@ func TestValidateDisplayName(t *testing.T) {
 		"trailing underscore": {"Name_", "", false},
 		"trailing dot ok":     {"Anna B.", "Anna B.", true},
 		"double trailing dot": {"Name..", "", false},
-		"digit rejected":      {"Name2", "", false},
+		"trailing digit ok":   {"Name2", "Name2", true},
+		"trailing year ok":    {"Аня2007", "Аня2007", true},
+		"five digits ok":      {"Player12345", "Player12345", true},
+		"six digits rejected": {"Player123456", "", false},
+		"mid digit rejected":  {"Dark2Wolf", "", false},
+		"all digits rejected": {"12345", "", false},
+		"digit then dot":      {"Name2.", "", false},
+		"dot then digit":      {"Anna B.2", "", false},
+		"sep plus digits ok":  {"Night.Fox2007", "Night.Fox2007", true},     // "." is the only special; digits do not count
+		"max specials+digits": {"a.a.a.a.a.a2007", "a.a.a.a.a.a2007", true}, // 5 dots + a digit run still passes
 		"blank":               {"   ", "", false},
 		"too long":            {strings.Repeat("a", 33), "", false},
 		"five specials ok":    {"a.a.a.a.a.a", "a.a.a.a.a.a", true},           // 5 dots

backend/internal/accountmerge/merge.go

@@ -1,5 +1,6 @@
 // Package accountmerge retires a secondary account into a primary one in a single
-// transaction: it sums statistics and the hint wallet, ORs the paid flag, repoints
+// transaction: it sums statistics (merging the per-variant best moves), sums the hint
+// wallet, ORs the paid flag, repoints
 // the secondary's identities, transfers its games/chat/complaints/invitations,
 // de-duplicates friends and blocks, and leaves the secondary as an audit tombstone
 // (accounts.merged_into). It is the data core of account linking & merge
@@ -68,6 +69,9 @@ func (m *Merger) Merge(ctx context.Context, primary, secondary uuid.UUID) error
 		if err := mergeStats(ctx, tx, primary, secondary, now); err != nil {
 			return err
 		}
+		if err := mergeBestMoves(ctx, tx, primary, secondary, now); err != nil {
+			return err
+		}
 		if err := mergeAccountFields(ctx, tx, primary, secondary, now); err != nil {
 			return err
 		}
@@ -147,8 +151,8 @@ func activeGameIDs(ctx context.Context, tx *sql.Tx, accountID uuid.UUID) ([]uuid
 	return out, nil
 }
 
-// mergeStats folds secondary's lifetime statistics into primary (wins/losses/draws
-// summed, max points kept) and deletes the secondary row.
+// mergeStats folds secondary's lifetime statistics into primary (wins/losses/draws and
+// the moves/hints-used counters summed, max points kept) and deletes the secondary row.
 func mergeStats(ctx context.Context, tx *sql.Tx, primary, secondary uuid.UUID, now time.Time) error {
 	var sec model.AccountStats
 	err := postgres.SELECT(table.AccountStats.AllColumns).
@@ -178,13 +182,16 @@ func mergeStats(ctx context.Context, tx *sql.Tx, primary, secondary uuid.UUID, n
 
 	upd := table.AccountStats.UPDATE(
 		table.AccountStats.Wins, table.AccountStats.Losses, table.AccountStats.Draws,
-		table.AccountStats.MaxGamePoints, table.AccountStats.MaxWordPoints, table.AccountStats.UpdatedAt,
+		table.AccountStats.MaxGamePoints, table.AccountStats.MaxWordPoints,
+		table.AccountStats.Moves, table.AccountStats.HintsUsed, table.AccountStats.UpdatedAt,
 	).SET(
 		postgres.Int(int64(pri.Wins+sec.Wins)),
 		postgres.Int(int64(pri.Losses+sec.Losses)),
 		postgres.Int(int64(pri.Draws+sec.Draws)),
 		postgres.Int(int64(max(pri.MaxGamePoints, sec.MaxGamePoints))),
 		postgres.Int(int64(max(pri.MaxWordPoints, sec.MaxWordPoints))),
+		postgres.Int(int64(pri.Moves+sec.Moves)),
+		postgres.Int(int64(pri.HintsUsed+sec.HintsUsed)),
 		postgres.TimestampzT(now),
 	).WHERE(table.AccountStats.AccountID.EQ(postgres.UUID(primary)))
 	if _, err := upd.ExecContext(ctx, tx); err != nil {
@@ -198,6 +205,41 @@ func mergeStats(ctx context.Context, tx *sql.Tx, primary, secondary uuid.UUID, n
 	return nil
 }
 
+// mergeBestMoves folds secondary's per-variant best moves into primary, keeping the
+// higher-scoring play per variant (the same rule the per-game upsert uses), then deletes
+// the secondary's rows — the secondary is only tombstoned, not removed, so without this
+// they would linger on a dead account and never reach the merged statistics screen.
+func mergeBestMoves(ctx context.Context, tx *sql.Tx, primary, secondary uuid.UUID, now time.Time) error {
+	var srows []model.AccountBestMove
+	err := postgres.SELECT(table.AccountBestMove.AllColumns).
+		FROM(table.AccountBestMove).
+		WHERE(table.AccountBestMove.AccountID.EQ(postgres.UUID(secondary))).
+		QueryContext(ctx, tx, &srows)
+	if err != nil && !errors.Is(err, qrm.ErrNoRows) {
+		return fmt.Errorf("accountmerge: load secondary best moves: %w", err)
+	}
+	for _, s := range srows {
+		ins := table.AccountBestMove.
+			INSERT(table.AccountBestMove.AccountID, table.AccountBestMove.Variant,
+				table.AccountBestMove.Score, table.AccountBestMove.Tiles, table.AccountBestMove.UpdatedAt).
+			VALUES(primary, s.Variant, s.Score, s.Tiles, postgres.TimestampzT(now)).
+			ON_CONFLICT(table.AccountBestMove.AccountID, table.AccountBestMove.Variant).
+			DO_UPDATE(postgres.SET(
+				table.AccountBestMove.Score.SET(table.AccountBestMove.EXCLUDED.Score),
+				table.AccountBestMove.Tiles.SET(table.AccountBestMove.EXCLUDED.Tiles),
+				table.AccountBestMove.UpdatedAt.SET(table.AccountBestMove.EXCLUDED.UpdatedAt),
+			).WHERE(table.AccountBestMove.EXCLUDED.Score.GT(table.AccountBestMove.Score)))
+		if _, err := ins.ExecContext(ctx, tx); err != nil {
+			return fmt.Errorf("accountmerge: merge best move %s: %w", s.Variant, err)
+		}
+	}
+	del := table.AccountBestMove.DELETE().WHERE(table.AccountBestMove.AccountID.EQ(postgres.UUID(secondary)))
+	if _, err := del.ExecContext(ctx, tx); err != nil {
+		return fmt.Errorf("accountmerge: delete secondary best moves: %w", err)
+	}
+	return nil
+}
+
 // mergeAccountFields adds secondary's hint wallet to primary and ORs the paid flag;
 // all other profile fields stay the primary's.
 func mergeAccountFields(ctx context.Context, tx *sql.Tx, primary, secondary uuid.UUID, now time.Time) error {

backend/internal/adminconsole/assets/console.css

@@ -86,6 +86,22 @@ h1 { font-size: 1.4rem; margin: 0 0 0.4rem; }
   font: inherit;
 }
 .form textarea { min-height: 4rem; resize: vertical; }
+/* A static help aside (e.g. message-formatting hints) beside an intro note at the top of a
+   section: the note fills the row, the aside takes ~40% and both wrap on a narrow viewport. */
+.help-top { display: flex; flex-wrap: wrap; gap: 1rem; align-items: flex-start; margin: 0.2rem 0 0.6rem; }
+.help-top .note { flex: 1 1 16rem; margin: 0; }
+.help {
+  flex: 0 1 40%;
+  min-width: 16rem;
+  background: var(--panel-hi);
+  border: 1px solid var(--line);
+  border-radius: 6px;
+  padding: 0.5rem 0.8rem;
+  font-size: 0.85rem;
+  color: var(--ink-dim);
+}
+.help h4 { margin: 0 0 0.4rem; font-size: 0.85rem; color: var(--ink); }
+.help p { margin: 0.35rem 0; }
 button {
   background: var(--accent);
   color: #06121f;
@@ -121,3 +137,59 @@ code { background: var(--bg); padding: 0.05rem 0.3rem; border-radius: 4px; }
    an image attachment is previewed inline, bounded so it cannot dominate the page. */
 .msgbody { white-space: pre-wrap; word-break: break-word; background: var(--bg); padding: 0.6rem 0.8rem; border-radius: 6px; margin: 0.6rem 0; }
 .attach { max-width: 100%; max-height: 480px; height: auto; border: 1px solid var(--line); border-radius: 6px; }
+
+/* Game replay (admin): a script-stepped board with rack panels around it, a move log and the
+   first-move draw. A placed tile shows its value as a subscript; a 0 value (a blank) shows none. */
+.replay-stage {
+  display: grid;
+  grid-template-columns: auto minmax(0, 1fr) auto;
+  grid-template-areas: ".    top    ." "left board  right" ".    bottom .";
+  gap: 0.5rem;
+  align-items: center;
+  justify-items: center;
+  margin-bottom: 0.6rem;
+}
+.rack-top { grid-area: top; }
+.rack-bottom { grid-area: bottom; }
+.rack-left { grid-area: left; }
+.rack-right { grid-area: right; }
+.replay-board { grid-area: board; overflow: auto; }
+.board-grid {
+  display: grid;
+  grid-template-columns: 1.4rem repeat(15, 1.7rem);
+  grid-auto-rows: 1.7rem;
+  gap: 1px;
+  background: var(--line);
+  border: 1px solid var(--line);
+  width: max-content;
+}
+.board-grid .bh { display: flex; align-items: center; justify-content: center; font-size: 0.6rem; color: var(--ink-dim); background: var(--panel); }
+.board-grid .cell { position: relative; display: flex; align-items: center; justify-content: center; background: var(--panel-hi); }
+.cell .prem { font-size: 0.55rem; color: var(--ink); opacity: 0.8; }
+.cell.tw { background: #7a2230; }
+.cell.dw { background: #a8506a; }
+.cell.tl { background: #235a7a; }
+.cell.dl { background: #3f87a8; }
+.cell.centre .prem { font-size: 0.95rem; color: var(--warn); opacity: 1; }
+.tile {
+  display: inline-flex; align-items: baseline; justify-content: center;
+  min-width: 1.35rem; height: 1.35rem; padding: 0 0.12rem;
+  background: #e8d9a0; color: #1b1408; border-radius: 3px;
+  font-weight: 700; font-size: 0.8rem; line-height: 1.35rem;
+}
+.tile sub { font-size: 0.5rem; font-weight: 600; line-height: 1; align-self: flex-end; margin-left: 1px; }
+.tile.blank { background: #cdbfe0; }
+.cell.filled { background: var(--panel-hi); }
+.cell.filled .tile { width: 100%; height: 100%; border-radius: 2px; }
+.rack-slot { padding: 0.25rem; border-radius: 6px; }
+.rack-slot.active { outline: 2px solid var(--accent); background: var(--panel-hi); }
+.rack-name { font-size: 0.72rem; color: var(--ink-dim); margin-bottom: 0.2rem; text-align: center; }
+.rack-tiles { display: flex; gap: 2px; flex-wrap: wrap; justify-content: center; }
+.rack-left .rack-tiles, .rack-right .rack-tiles { flex-direction: column; }
+.replay-controls { display: flex; align-items: center; gap: 0.8rem; justify-content: center; margin: 0.6rem 0; }
+.replay-controls button { background: var(--panel-hi); color: var(--ink); border: 1px solid var(--line); font-weight: 600; }
+.replay-controls button:disabled { opacity: 0.4; cursor: default; }
+.replay-pos { color: var(--ink-dim); font-variant-numeric: tabular-nums; }
+.replay-log { margin: 0.4rem 0 0; padding-left: 1.4rem; max-height: 14rem; overflow: auto; font-size: 0.85rem; }
+.replay-log li { color: var(--ink-dim); padding: 0.1rem 0; }
+.replay-log li.cur { color: var(--ink); font-weight: 600; }

backend/internal/adminconsole/render_test.go

@@ -26,6 +26,11 @@ func TestRendererRendersEveryPage(t *testing.T) {
 		{"user_detail", UserDetailView{ID: "a1", DisplayName: "Kaya", HasStats: true, Stats: StatsRow{Wins: 2}, TelegramID: "123", ConnectorEnabled: true}, "Send Telegram message"},
 		{"user_detail", UserDetailView{ID: "a1", DisplayName: "Kaya", FlaggedHighRateAt: "2026-06-10 12:00"}, "Clear high-rate flag"},
 		{"user_detail", UserDetailView{ID: "a1", DisplayName: "Kaya", Roles: []string{"feedback_banned"}, KnownRoles: []string{"feedback_banned"}}, "feedback_banned"},
+		{"user_detail", UserDetailView{ID: "a1", DisplayName: "Kaya",
+			Friends:   []RelationRow{{AccountID: "b2", DisplayName: "Ann", Date: "2026-06-10 12:00"}},
+			Blocks:    []RelationRow{{AccountID: "c3", DisplayName: "Bob", Date: "2026-06-11 09:00"}},
+			BlockedBy: []RelationRow{{AccountID: "d4", DisplayName: "Cay", Date: "2026-06-12 08:00"}},
+		}, `/_gm/users/c3`},
 		{"throttled", ThrottledView{
 			Episodes:      []ThrottleEpisodeRow{{Class: "user", Key: "a1", UserID: "a1", Rejected: 1234, FirstSeen: "2026-06-10 12:00", LastSeen: "2026-06-10 12:05"}},
 			Flagged:       []FlaggedAccountRow{{ID: "a1", DisplayName: "Kaya", FlaggedAt: "2026-06-10 12:05"}},
@@ -35,9 +40,10 @@ func TestRendererRendersEveryPage(t *testing.T) {
 		{"games", GamesView{Items: []GameRow{{ID: "g-open", Variant: "scrabble_en", Status: "open"}}, Status: "open", Pager: NewPager(1, 50, 1)}, "?status=open"},
 		{"game_detail", GameDetailView{ID: "g1", Variant: "scrabble_en", Seats: []SeatRow{{Seat: 0, DisplayName: "Kaya"}}}, "Seats"},
 		{"complaints", ComplaintsView{Items: []ComplaintRow{{ID: "c1", Word: "qi", Status: "open"}}, Status: "open", Pager: NewPager(1, 50, 1)}, "qi"},
-		{"messages", MessagesView{Items: []MessageRow{{ID: "m1", SenderID: "a1", SenderName: "Kaya", Source: "telegram", Body: "good luck", GameID: "g1"}}, Pager: NewPager(1, 50, 1)}, "good luck"},
+		{"messages", MessagesView{Items: []MessageRow{{ID: "m1", SenderID: "a1", SenderName: "Kaya", Source: "telegram", Body: "good luck", GameID: "g1", Unread: true}}, UnreadOnly: true, Pager: NewPager(1, 50, 1)}, "unread only"},
+		{"chatmessage", ChatMessageDetailView{ID: "m1", GameID: "g1", SenderID: "a1", SenderName: "Kaya", Source: "telegram", Kind: "message", Body: "good luck", Unread: true, Seats: []ChatSeatStatusRow{{Seat: 0, AccountID: "a1", DisplayName: "Kaya", Role: "sender"}, {Seat: 1, AccountID: "b2", DisplayName: "Opp", Role: "unread"}}}, "Read by seat"},
 		{"feedback", FeedbackView{Items: []FeedbackRow{{ID: "f1", AccountID: "a1", SenderName: "Kaya", Source: "telegram", Channel: "web", HasAttachment: true, Replied: true}}, Status: "unread", Pager: NewPager(1, 50, 1)}, "replied"},
-		{"feedback_detail", FeedbackDetailView{ID: "f1", AccountID: "a1", SenderName: "Kaya", Channel: "telegram", InterfaceLanguage: "en", BotLanguage: "ru", Body: "please fix the board", HasAttachment: true, AttachmentName: "shot.png", IsImage: true, Banned: true}, "bot: ru"},
+		{"feedback_detail", FeedbackDetailView{ID: "f1", AccountID: "a1", SenderName: "Kaya", Channel: "telegram", InterfaceLanguage: "en", Body: "please fix the board", HasAttachment: true, AttachmentName: "shot.png", IsImage: true, Banned: true}, "Interface language"},
 		{"complaint_detail", ComplaintDetailView{ID: "c1", Word: "qi", Variant: "scrabble_en"}, "Resolve"},
 		{"dictionary", DictionaryView{ActiveVersion: "v1.0.0", Variants: []VariantVersions{{Variant: "scrabble_en", Versions: []string{"v1.0.0"}}}, Changes: []DictChangeRow{{Variant: "scrabble_en", Word: "qi", Action: "add"}}}, "Update dictionaries"},
 		{"dictionary_preview", DictionaryPreviewView{Version: "v1.1.0", Token: "0123456789abcdef0123456789abcdef", ActiveVersion: "v1.0.0", Variants: []VariantDiffRow{{Variant: "scrabble_en", AddedCount: 2, RemovedCount: 1, AddedSample: []string{"qi", "za"}, RemovedSample: []string{"xqz"}, RemovedTruncated: true}}}, "v1.1.0"},

backend/internal/adminconsole/templates/layout.gohtml

@@ -20,6 +20,7 @@
     <a href="/_gm/messages"{{if eq .ActiveNav "messages"}} class="active"{{end}}>Messages</a>
     <a href="/_gm/throttled"{{if eq .ActiveNav "throttled"}} class="active"{{end}}>Throttled</a>
     <a href="/_gm/reasons"{{if eq .ActiveNav "reasons"}} class="active"{{end}}>Reasons</a>
+    <a href="/_gm/banners"{{if eq .ActiveNav "banners"}} class="active"{{end}}>Banners</a>
     <a href="/_gm/dictionary"{{if eq .ActiveNav "dictionary"}} class="active"{{end}}>Dictionary</a>
     <a href="/_gm/broadcast"{{if eq .ActiveNav "broadcast"}} class="active"{{end}}>Broadcast</a>
     <a href="/_gm/grafana/">Grafana ↗</a>

backend/internal/adminconsole/templates/pages/banner_detail.gohtml

@@ -0,0 +1,58 @@
+{{define "content" -}}
+{{with .Data}}
+<p class="note"><a href="/_gm/banners">← all campaigns</a></p>
+<h1>{{.Name}}{{if .IsDefault}} <span class="pill">default</span>{{end}}</h1>
+<section class="panel"><h2>Settings</h2>
+{{if .IsDefault}}<p class="note">The default campaign is perpetual and fills the unsold remainder — only its name and messages are editable.</p>{{end}}
+<form class="form col" method="post" action="/_gm/banners/{{.ID}}">
+<label>Name <input type="text" name="name" value="{{.Name}}" maxlength="80" required></label>
+{{if not .IsDefault}}
+<label>Weight (%) <input type="number" name="weight" min="1" max="100" value="{{.Weight}}" required></label>
+<label>Starts (UTC) <input type="datetime-local" name="starts_at" value="{{.StartsAt}}"></label>
+<label>Ends (UTC) <input type="datetime-local" name="ends_at" value="{{.EndsAt}}"></label>
+<label><input type="checkbox" name="enabled"{{if .Enabled}} checked{{end}}> Enabled</label>
+{{end}}
+<div><button type="submit">Save</button></div>
+</form>
+{{if not .IsDefault}}
+<form class="form" method="post" action="/_gm/banners/{{.ID}}/delete" onsubmit="return confirm('Delete this campaign and its messages?')">
+<button type="submit" class="danger">Delete campaign</button>
+</form>
+{{end}}
+</section>
+<section class="panel"><h2>Messages</h2>
+<div class="help-top">
+<p class="note">Each message must be filled in both languages; the viewer sees the variant for the bot they play through. The messages of a campaign share its show weight, rotating in this order.</p>
+<aside class="help">
+<h4>Formatting</h4>
+<p>Plain text is shown as-is (any HTML is escaped).</p>
+<p>Add a link with markdown — <code>[visible text](https://example.com)</code> — which renders as the linked <em>visible text</em>.</p>
+<p>Only <code>https://</code>, <code>http://</code> and root-relative <code>/path</code> targets become links; any other scheme (e.g. <code>javascript:</code>, <code>ftp:</code>) is dropped and shown as plain text.</p>
+<p>Keep it short: an over-long line scrolls in the strip; the same formatting applies when editing a message above.</p>
+</aside>
+</div>
+{{range .Messages}}
+<div class="row">
+<form class="form col" method="post" action="/_gm/banners/{{$.Data.ID}}/messages/{{.ID}}">
+<label>English <textarea name="body_en" rows="3" maxlength="500" required>{{.BodyEn}}</textarea></label>
+<label>Russian <textarea name="body_ru" rows="3" maxlength="500" required>{{.BodyRu}}</textarea></label>
+<div class="actions">
+<button type="submit">Save</button>
+</div>
+</form>
+<div class="actions">
+<form class="form" method="post" action="/_gm/banners/{{$.Data.ID}}/messages/{{.ID}}/move"><input type="hidden" name="dir" value="up"><button type="submit"{{if .First}} disabled{{end}}>↑</button></form>
+<form class="form" method="post" action="/_gm/banners/{{$.Data.ID}}/messages/{{.ID}}/move"><input type="hidden" name="dir" value="down"><button type="submit"{{if .Last}} disabled{{end}}>↓</button></form>
+<form class="form" method="post" action="/_gm/banners/{{$.Data.ID}}/messages/{{.ID}}/delete" onsubmit="return confirm('Delete this message?')"><button type="submit" class="danger">Delete</button></form>
+</div>
+</div>
+{{else}}<p class="note">no messages yet</p>{{end}}
+<h3>Add message</h3>
+<form class="form col" method="post" action="/_gm/banners/{{.ID}}/messages">
+<label>English <textarea name="body_en" rows="3" maxlength="500" required></textarea></label>
+<label>Russian <textarea name="body_ru" rows="3" maxlength="500" required></textarea></label>
+<div><button type="submit">Add message</button></div>
+</form>
+</section>
+{{end}}
+{{- end}}

backend/internal/adminconsole/templates/pages/banner_settings.gohtml

@@ -0,0 +1,18 @@
+{{define "content" -}}
+<p class="note"><a href="/_gm/banners">← all campaigns</a></p>
+<h1>Banner display timings</h1>
+{{with .Data}}
+<p class="note">Global timings the client's banner rotator reads. Out-of-range values are clamped on save. The transition between messages is fade-out, then a gap, then fade-in (skipped under reduce-motion).</p>
+<section class="panel">
+<form class="form col" method="post" action="/_gm/banner-settings">
+<label>Hold (ms) — how long one message shows <input type="number" name="hold_ms" min="3000" max="600000" value="{{.HoldMs}}" required></label>
+<label>Edge pause (ms) — pause at each end before/after scrolling a long message <input type="number" name="edge_pause_ms" min="0" max="60000" value="{{.EdgePauseMs}}" required></label>
+<label>Scroll speed (px/s) — for a message wider than the strip <input type="number" name="scroll_px_per_sec" min="5" max="1000" value="{{.ScrollPxPerSec}}" required></label>
+<label>Fade-out (ms) <input type="number" name="fade_out_ms" min="0" max="5000" value="{{.FadeOutMs}}" required></label>
+<label>Gap (ms) — pause between fade-out and fade-in <input type="number" name="gap_ms" min="0" max="5000" value="{{.GapMs}}" required></label>
+<label>Fade-in (ms) <input type="number" name="fade_in_ms" min="0" max="5000" value="{{.FadeInMs}}" required></label>
+<div><button type="submit">Save</button></div>
+</form>
+</section>
+{{end}}
+{{- end}}

backend/internal/adminconsole/templates/pages/banners.gohtml

@@ -0,0 +1,32 @@
+{{define "content" -}}
+<h1>Advertising banners</h1>
+{{with .Data}}
+<p class="note">Campaigns compete for the one-line banner shown to free users (no paid account, an empty hint wallet, and no <code>no_banner</code> role). A campaign's weight is a show percent; the perpetual <strong>default</strong> campaign fills the remainder up to 100% and drops out of the rotation when timed campaigns already total 100%. <a href="/_gm/banner-settings">Display timings →</a></p>
+<section class="panel"><h2>Add campaign</h2>
+<form class="form col" method="post" action="/_gm/banners">
+<label>Name <input type="text" name="name" maxlength="80" required></label>
+<label>Weight (%) <input type="number" name="weight" min="1" max="100" value="10" required></label>
+<label>Starts (UTC) <input type="datetime-local" name="starts_at"></label>
+<label>Ends (UTC) <input type="datetime-local" name="ends_at"></label>
+<label><input type="checkbox" name="enabled" checked> Enabled</label>
+<div><button type="submit">Add</button></div>
+</form>
+</section>
+<section class="panel"><h2>Campaigns</h2>
+<table class="list">
+<thead><tr><th>Name</th><th class="num">Weight</th><th>Window</th><th class="num">Messages</th><th>Status</th></tr></thead>
+<tbody>
+{{range .Items}}
+<tr>
+<td><a href="/_gm/banners/{{.ID}}">{{.Name}}</a>{{if .IsDefault}} <span class="pill">default</span>{{end}}</td>
+<td class="num">{{if .IsDefault}}remainder{{else}}{{.Weight}}%{{end}}</td>
+<td>{{.Window}}</td>
+<td class="num">{{.Messages}}</td>
+<td>{{if .ActiveNow}}live{{else if .Enabled}}idle{{else}}disabled{{end}}</td>
+</tr>
+{{else}}<tr><td colspan="5"><span class="note">no campaigns</span></td></tr>{{end}}
+</tbody>
+</table>
+</section>
+{{end}}
+{{- end}}

backend/internal/adminconsole/templates/pages/broadcast.gohtml

@@ -5,7 +5,6 @@
 {{if .ConnectorEnabled}}
 <form class="form col" method="post" action="/_gm/broadcast">
 <label>Message <textarea name="text" required></textarea></label>
-<label>Bot language <select name="language"><option value="en">en</option><option value="ru">ru</option></select></label>
 <div><button type="submit">Post to channel</button></div>
 </form>
 {{else}}<p class="note">connector not configured (set BACKEND_CONNECTOR_ADDR)</p>{{end}}

backend/internal/adminconsole/templates/pages/chatmessage.gohtml

@@ -0,0 +1,28 @@
+{{define "content" -}}
+{{with .Data}}
+<h1>Message</h1>
+<nav class="subnav"><a href="/_gm/messages">&laquo; messages</a> · <a href="/_gm/games/{{.GameID}}">game</a> · <a href="/_gm/messages?game={{.GameID}}">game messages</a></nav>
+<section class="panel"><h2>Summary</h2>
+<ul class="kv">
+<li><b>Time</b> {{.CreatedAt}}</li>
+<li><b>Sender</b> <a href="/_gm/users/{{.SenderID}}">{{.SenderName}}</a> ({{.Source}})</li>
+<li><b>IP</b> {{.IP}}</li>
+<li><b>Kind</b> {{.Kind}}</li>
+<li><b>Read</b> {{if .Unread}}unread{{else}}read{{end}}</li>
+<li><b>Message</b> {{.Body}}</li>
+</ul>
+</section>
+<section class="panel"><h2>Read by seat</h2>
+<table class="list">
+<thead><tr><th>Seat</th><th>Player</th><th>Status</th></tr></thead>
+<tbody>
+{{range .Seats}}
+<tr><td>{{.Seat}}</td><td><a href="/_gm/users/{{.AccountID}}">{{if .DisplayName}}{{.DisplayName}}{{else}}{{.AccountID}}{{end}}</a></td><td>{{if eq .Role "read"}}<span class="ok">read</span>{{else if eq .Role "unread"}}unread{{else}}sender{{end}}</td></tr>
+{{else}}
+<tr><td colspan="3"><span class="note">no seats</span></td></tr>
+{{end}}
+</tbody>
+</table>
+</section>
+{{end}}
+{{- end}}

backend/internal/adminconsole/templates/pages/feedback_detail.gohtml

@@ -5,10 +5,11 @@
 <section class="panel"><h2>Message</h2>
 <ul class="kv">
 <li><b>From</b> <a href="/_gm/users/{{.AccountID}}">{{.SenderName}}</a> ({{.Source}})</li>
-<li><b>Channel</b> {{.Channel}}{{if .BotLanguage}} (bot: {{.BotLanguage}}){{end}}</li>
+<li><b>Channel</b> {{.Channel}}</li>
 <li><b>Interface language</b> {{.InterfaceLanguage}}</li>
+<li><b>App version</b> {{if .Version}}<code>{{.Version}}</code>{{else}}<span class="note">unknown</span>{{end}}</li>
 <li><b>IP</b> {{if .IP}}<code>{{.IP}}</code>{{else}}<span class="note">none</span>{{end}}</li>
-<li><b>Filed</b> {{.CreatedAt}}</li>
+<li><b>Filed</b> {{.CreatedAt}} UTC &middot; browser {{if .CreatedAtBrowser}}{{.CreatedAtBrowser}} ({{.BrowserTZ}}){{else}}<span class="note">N/A</span>{{end}} &middot; user {{if .CreatedAtUser}}{{.CreatedAtUser}} ({{.UserTZ}}){{else}}<span class="note">N/A</span>{{end}}</li>
 <li><b>State</b> {{if .Archived}}archived{{else if .Read}}read{{else}}<span class="warn">unread</span>{{end}}</li>
 {{if .Banned}}<li><b>Feedback</b> <span class="warn">sender is banned from feedback</span></li>{{end}}
 </ul>

backend/internal/adminconsole/templates/pages/game_detail.gohtml

@@ -7,6 +7,7 @@
 <li><b>Variant</b> {{.Variant}}</li>
 <li><b>Dictionary</b> {{.DictVersion}}</li>
 <li><b>Status</b> {{.Status}}{{if .EndReason}} ({{.EndReason}}){{end}}</li>
+<li><b>AI game</b> {{if .VsAI}}🤖 yes{{else}}no{{end}}</li>
 <li><b>Players</b> {{.Players}}</li>
 <li><b>To move</b> seat {{.ToMove}}</li>
 <li><b>Moves</b> {{.MoveCount}}</li>
@@ -26,5 +27,87 @@
 </table>
 {{if .HasRobot}}<p><small>Play-to-win is decided once per game from the bag seed; robots play to win in ~{{.RobotTargetPct}}% of games.</small></p>{{end}}
 </section>
+{{if .SetupDraws}}
+<section class="panel"><h2>First-move draw</h2>
+<p class="note">Each player draws a tile; the one closest to &ldquo;A&rdquo; moves first (a blank beats every letter), ties re-drawing until a single leader remains.{{if .FirstMover}} <b>{{.FirstMover}}</b> leads.{{end}}</p>
+<table class="list">
+<thead><tr><th>Round</th><th>Player</th><th>Tile</th><th>Rank</th></tr></thead>
+<tbody>
+{{range .SetupDraws}}
+<tr><td>{{.Round}}</td><td>{{if .AccountID}}<a href="/_gm/users/{{.AccountID}}">{{.Name}}</a>{{else}}{{.Name}}{{end}}</td><td>{{.Letter}}{{if .Blank}} <small>(blank)</small>{{end}}</td><td>{{.Rank}}</td></tr>
+{{end}}
+</tbody>
+</table>
+</section>
+{{end}}
+{{if .HasReplay}}
+<section class="panel"><h2>Replay</h2>
+<div class="replay-stage">
+  <div class="rack-slot rack-top" data-seat="0"></div>
+  <div class="rack-slot rack-left" data-seat="2"></div>
+  <div class="replay-board" id="replay-board"></div>
+  <div class="rack-slot rack-right" data-seat="3"></div>
+  <div class="rack-slot rack-bottom" data-seat="1"></div>
+</div>
+<div class="replay-controls">
+  <button type="button" id="replay-prev">&#9664; prev</button>
+  <span class="replay-pos" id="replay-pos"></span>
+  <button type="button" id="replay-next">next &#9654;</button>
+</div>
+<ol class="replay-log" id="replay-log"></ol>
+<script>
+const REPLAY = {{.ReplayJSON}};
+(function(){
+  if(!REPLAY||!REPLAY.steps){return;}
+  const N=15, COLS="ABCDEFGHIJKLMNO", PREM={tw:"3W",dw:"2W",tl:"3L",dl:"2L"};
+  const boardEl=document.getElementById("replay-board"), logEl=document.getElementById("replay-log");
+  const posEl=document.getElementById("replay-pos"), prevBtn=document.getElementById("replay-prev"), nextBtn=document.getElementById("replay-next");
+  let step=0;
+  function esc(s){const d=document.createElement("div");d.textContent=s==null?"":s;return d.innerHTML;}
+  function tileHTML(t){const sub=(t.v&&t.v>0)?"<sub>"+t.v+"<\/sub>":"";return "<span class=\"tile"+(t.b?" blank":"")+"\">"+esc(t.l)+sub+"<\/span>";}
+  function placedAt(k){const m={};for(let s=1;s<=k;s++){const mv=REPLAY.steps[s]&&REPLAY.steps[s].move;if(mv&&mv.placements){for(const p of mv.placements){m[p.r+","+p.c]=p;}}}return m;}
+  function renderBoard(){
+    const placed=placedAt(step);let h="<div class=\"board-grid\"><div class=\"bh corner\"><\/div>";
+    for(let c=0;c<N;c++){h+="<div class=\"bh\">"+COLS[c]+"<\/div>";}
+    for(let r=0;r<N;r++){h+="<div class=\"bh\">"+(r+1)+"<\/div>";
+      for(let c=0;c<N;c++){const p=placed[r+","+c];
+        if(p){h+="<div class=\"cell filled\">"+tileHTML(p)+"<\/div>";continue;}
+        const prem=REPLAY.premium[r][c], centre=(r===REPLAY.centre[0]&&c===REPLAY.centre[1]);
+        const label=centre?"&#9733;":(prem?PREM[prem]:"");
+        h+="<div class=\"cell "+(prem||"")+(centre?" centre":"")+"\">"+(label?"<span class=\"prem\">"+label+"<\/span>":"")+"<\/div>";}}
+    h+="<\/div>";boardEl.innerHTML=h;
+  }
+  function renderRacks(){
+    const st=REPLAY.steps[step];
+    document.querySelectorAll(".rack-slot").forEach(function(slot){
+      const seat=parseInt(slot.dataset.seat,10), info=REPLAY.seats.find(function(s){return s.seat===seat;}), rack=st.racks[seat];
+      if(!info||!rack){slot.style.display="none";slot.innerHTML="";return;}
+      slot.style.display="";slot.classList.toggle("active",st.toMove===seat);
+      const nm=info.accountId?"<a href=\"/_gm/users/"+info.accountId+"\">"+esc(info.name)+"<\/a>":esc(info.name||("seat "+seat));
+      slot.innerHTML="<div class=\"rack-name\">"+nm+" &middot; "+(st.scores[seat]||0)+"<\/div><div class=\"rack-tiles\">"+rack.map(tileHTML).join("")+"<\/div>";
+    });
+  }
+  function renderLog(){
+    let h="";
+    for(let s=1;s<=step;s++){const st=REPLAY.steps[s], m=st.move;if(!m){continue;}
+      const who=((REPLAY.seats.find(function(x){return x.seat===m.seat;})||{}).name)||("seat "+m.seat);
+      let desc;
+      if(m.action==="play"){desc="played "+((m.words&&m.words.length)?m.words.join(", "):"")+" for "+m.score;}
+      else if(m.action==="exchange"){desc="exchanged "+((m.exchanged&&m.exchanged.length)||0)+" tiles";}
+      else if(m.action==="pass"){desc="passed";}
+      else{desc=m.action;}
+      const drew=(st.drawn&&st.drawn.length)?" &middot; drew "+st.drawn.map(function(t){return t.l;}).join(""):"";
+      h+="<li class=\""+(s===step?"cur":"")+"\">"+esc(who)+" "+esc(desc)+drew+" &middot; bag "+st.bagLen+"<\/li>";}
+    logEl.innerHTML=h||"<li class=\"note\">opening position<\/li>";
+  }
+  function render(){renderBoard();renderRacks();renderLog();posEl.textContent=step+" / "+(REPLAY.steps.length-1);prevBtn.disabled=step<=0;nextBtn.disabled=step>=REPLAY.steps.length-1;}
+  prevBtn.onclick=function(){if(step>0){step--;render();}};
+  nextBtn.onclick=function(){if(step<REPLAY.steps.length-1){step++;render();}};
+  document.addEventListener("keydown",function(e){if(e.key==="ArrowLeft"){prevBtn.click();}else if(e.key==="ArrowRight"){nextBtn.click();}});
+  render();
+})();
+</script>
+</section>
+{{end}}
 {{end}}
 {{- end}}

backend/internal/adminconsole/templates/pages/games.gohtml

@@ -8,11 +8,11 @@
 <a href="/_gm/games?status=finished"{{if eq .Status "finished"}} class="active"{{end}}>finished</a>
 </nav>
 <table class="list">
-<thead><tr><th>Game</th><th>Variant</th><th>Status</th><th class="num">Players</th><th>Updated</th></tr></thead>
+<thead><tr><th>Game</th><th>Variant</th><th>Status</th><th>🤖</th><th class="num">Players</th><th>Updated</th></tr></thead>
 <tbody>
 {{range .Items}}
-<tr><td><a href="/_gm/games/{{.ID}}">{{.ID}}</a></td><td>{{.Variant}}</td><td>{{.Status}}</td><td class="num">{{.Players}}</td><td>{{.UpdatedAt}}</td></tr>
-{{else}}<tr><td colspan="5"><span class="note">no games</span></td></tr>{{end}}
+<tr><td><a href="/_gm/games/{{.ID}}">{{.ID}}</a></td><td>{{.Variant}}</td><td>{{.Status}}</td><td>{{if .VsAI}}🤖{{end}}</td><td class="num">{{.Players}}</td><td>{{.UpdatedAt}}</td></tr>
+{{else}}<tr><td colspan="6"><span class="note">no games</span></td></tr>{{end}}
 </tbody>
 </table>
 <nav class="pager">

backend/internal/adminconsole/templates/pages/messages.gohtml

@@ -6,6 +6,7 @@
 {{if .UserID}}<input type="hidden" name="user" value="{{.UserID}}">{{end}}
 <input name="name" value="{{.NameMask}}" placeholder="sender name mask (* ?)">
 <input name="ext" value="{{.ExtMask}}" placeholder="sender external id mask (* ?)">
+<label class="check"><input type="checkbox" name="unread" value="1"{{if .UnreadOnly}} checked{{end}}> unread only</label>
 <button type="submit">Filter</button>
 <a class="export" href="/_gm/messages.csv?{{.FilterQuery}}">Export CSV ↓</a>
 </form>
@@ -13,19 +14,20 @@
 <p class="note">Filtered{{if .GameID}} to game <a href="/_gm/games/{{.GameID}}">{{.GameID}}</a>{{end}}{{if .UserID}} from <a href="/_gm/users/{{.UserID}}">sender</a>{{end}} · <a href="/_gm/messages">clear</a></p>
 {{end}}
 <table class="list">
-<thead><tr><th>Time</th><th>Source</th><th>Sender</th><th>IP</th><th>Message</th><th>Game</th></tr></thead>
+<thead><tr><th>Time</th><th>Source</th><th>Sender</th><th>IP</th><th>Message</th><th>Read</th><th>Game</th></tr></thead>
 <tbody>
 {{range .Items}}
 <tr>
-<td>{{.CreatedAt}}</td>
+<td><a href="/_gm/messages/{{.ID}}">{{.CreatedAt}}</a></td>
 <td>{{.Source}}</td>
 <td><a href="/_gm/users/{{.SenderID}}">{{.SenderName}}</a></td>
 <td>{{.IP}}</td>
 <td>{{.Body}}</td>
+<td>{{if .Unread}}unread{{else}}read{{end}}</td>
 <td><a href="/_gm/games/{{.GameID}}">game</a></td>
 </tr>
 {{else}}
-<tr><td colspan="6"><span class="note">no messages</span></td></tr>
+<tr><td colspan="7"><span class="note">no messages</span></td></tr>
 {{end}}
 </tbody>
 </table>

backend/internal/adminconsole/templates/pages/throttled.gohtml

@@ -5,6 +5,26 @@
 list is in-memory and resets on a backend restart. An account sustaining
 {{.FlagThreshold}}+ rejected calls within {{.FlagWindow}} is soft-flagged for review
 below — never banned automatically; clear the flag on the user card.</p>
+<section class="panel"><h2>Active IP bans</h2>
+<p class="note">Temporary IP bans the gateway is currently enforcing (in-memory, prod-only;
+reset on a gateway restart). Unban applies on the gateway's next sync.</p>
+<table class="list">
+<thead><tr><th>IP</th><th>Reason</th><th>Since</th><th>Expires</th><th></th></tr></thead>
+<tbody>
+{{range .Bans}}
+<tr>
+<td><code>{{.IP}}</code></td>
+<td>{{.Reason}}</td>
+<td>{{.Since}}</td>
+<td>{{.Expires}}</td>
+<td><form class="form" method="post" action="/_gm/bans/unban"><input type="hidden" name="ip" value="{{.IP}}"><button type="submit">Unban</button></form></td>
+</tr>
+{{else}}
+<tr><td colspan="5"><span class="note">no active bans</span></td></tr>
+{{end}}
+</tbody>
+</table>
+</section>
 <section class="panel"><h2>Recent episodes</h2>
 <table class="list">
 <thead><tr><th>Class</th><th>Key</th><th class="num">Rejected</th><th>First seen</th><th>Last seen</th></tr></thead>

backend/internal/adminconsole/templates/pages/user_detail.gohtml

@@ -32,6 +32,8 @@
 <li><b>Wins</b> {{.Stats.Wins}}</li>
 <li><b>Losses</b> {{.Stats.Losses}}</li>
 <li><b>Draws</b> {{.Stats.Draws}}</li>
+<li><b>Moves</b> {{.Stats.Moves}}</li>
+<li><b>Hints used</b> {{.Stats.HintsUsed}}</li>
 <li><b>Best game</b> {{.Stats.MaxGamePoints}}</li>
 <li><b>Best move</b> {{.Stats.MaxWordPoints}}</li>
 </ul>
@@ -100,12 +102,41 @@
 </tbody>
 </table>
 </section>
+<section class="panel"><h2>Friends</h2>
+<table class="list">
+<thead><tr><th>Account</th><th>Friends since</th></tr></thead>
+<tbody>
+{{range .Friends}}
+<tr><td><a href="/_gm/users/{{.AccountID}}">{{.DisplayName}}</a></td><td>{{.Date}}</td></tr>
+{{else}}<tr><td colspan="2"><span class="note">no friends</span></td></tr>{{end}}
+</tbody>
+</table>
+</section>
+<section class="panel"><h2>Blocks</h2>
+<table class="list">
+<thead><tr><th>Account</th><th>Blocked at</th></tr></thead>
+<tbody>
+{{range .Blocks}}
+<tr><td><a href="/_gm/users/{{.AccountID}}">{{.DisplayName}}</a></td><td>{{.Date}}</td></tr>
+{{else}}<tr><td colspan="2"><span class="note">blocks no one</span></td></tr>{{end}}
+</tbody>
+</table>
+</section>
+<section class="panel"><h2>Blocked by</h2>
+<table class="list">
+<thead><tr><th>Account</th><th>Blocked at</th></tr></thead>
+<tbody>
+{{range .BlockedBy}}
+<tr><td><a href="/_gm/users/{{.AccountID}}">{{.DisplayName}}</a></td><td>{{.Date}}</td></tr>
+{{else}}<tr><td colspan="2"><span class="note">blocked by no one</span></td></tr>{{end}}
+</tbody>
+</table>
+</section>
 {{if .TelegramID}}
 <section class="panel"><h2>Send Telegram message</h2>
 {{if .ConnectorEnabled}}
 <form class="form col" method="post" action="/_gm/users/{{.ID}}/message">
 <label>Message <textarea name="text" required></textarea></label>
-<label>Bot language <select name="language"><option value="en">en</option><option value="ru">ru</option></select></label>
 <div><button type="submit">Send to user</button></div>
 </form>
 {{else}}<p class="note">connector not configured (set BACKEND_CONNECTOR_ADDR)</p>{{end}}

backend/internal/adminconsole/views.go

@@ -94,11 +94,13 @@ type MessagesView struct {
 	ExtMask     string
 	GameID      string
 	UserID      string
+	UnreadOnly  bool
 	FilterQuery template.URL
 }
 
 // MessageRow is one chat message in the moderation list: its sender (linked to the user
-// card), source, IP, body, game (linked to the game card) and time.
+// card), source, IP, body, game (linked to the game card), time, and whether it is still
+// unread by at least one recipient.
 type MessageRow struct {
 	ID         string
 	SenderID   string
@@ -108,6 +110,32 @@ type MessageRow struct {
 	Body       string
 	GameID     string
 	CreatedAt  string
+	Unread     bool
+}
+
+// ChatMessageDetailView is one chat message with its per-seat read breakdown, for the
+// console message card.
+type ChatMessageDetailView struct {
+	ID         string
+	GameID     string
+	SenderID   string
+	SenderName string
+	Source     string
+	Kind       string
+	Body       string
+	IP         string
+	CreatedAt  string
+	Unread     bool
+	Seats      []ChatSeatStatusRow
+}
+
+// ChatSeatStatusRow is one seat's read status on the message card: the seat index, the
+// occupant (linked to the user card) and its role ("sender", "read" or "unread").
+type ChatSeatStatusRow struct {
+	Seat        int
+	AccountID   string
+	DisplayName string
+	Role        string
 }
 
 // UserDetailView is one account with its stats, identities and recent games.
@@ -147,6 +175,21 @@ type UserDetailView struct {
 	// grant form offers. The first role is the feedback ban (see internal/account).
 	Roles      []string
 	KnownRoles []string
+	// Blocks, BlockedBy and Friends are the social graph on the card: who this account has
+	// blocked, who currently blocks it, and its mutual friendships — each cross-linked to the
+	// other account with the date it happened. They are the full truth; the asymmetric block
+	// suppression that hides relationships from players never applies to the console.
+	Blocks    []RelationRow
+	BlockedBy []RelationRow
+	Friends   []RelationRow
+}
+
+// RelationRow is one cross-linked account in the user card's blocks / blocked-by / friends
+// lists: the other account's id (the link target), its display name, and the pre-formatted date.
+type RelationRow struct {
+	AccountID   string
+	DisplayName string
+	Date        string
 }
 
 // SuspensionView is an account's current manual-block state shown on the user card: whether it
@@ -175,6 +218,8 @@ type StatsRow struct {
 	Draws         int
 	MaxGamePoints int
 	MaxWordPoints int
+	Moves         int
+	HintsUsed     int
 }
 
 // IdentityRow is one platform/email identity of an account.
@@ -192,6 +237,8 @@ type GameRow struct {
 	Status    string
 	Players   int
 	UpdatedAt string
+	// VsAI marks an honest-AI game (rendered as 🤖 in the list's AI column).
+	VsAI bool
 }
 
 // GamesView is the paginated games list, optionally filtered by status.
@@ -214,11 +261,34 @@ type GameDetailView struct {
 	CreatedAt   string
 	UpdatedAt   string
 	FinishedAt  string
-	Seats       []SeatRow
+	// VsAI marks an honest-AI game (shown as a 🤖 flag in the summary).
+	VsAI  bool
+	Seats []SeatRow
 	// HasRobot is true when any seat is a robot, gating the robot-target caption;
 	// RobotTargetPct is the configured global play-to-win rate, in percent.
 	HasRobot       bool
 	RobotTargetPct int
+	// ReplayJSON is the game-replay payload (board, seats, per-step racks/scores/bag) the
+	// game_detail page feeds to its vanilla-JS stepper; HasReplay gates the replay section.
+	ReplayJSON template.JS
+	HasReplay  bool
+	// SetupDraws is the first-move draw — one row per tile drawn (docs/ARCHITECTURE.md §6) —
+	// and FirstMover is the resolved name of the seat-0 player the draw elected.
+	SetupDraws []SetupDrawRow
+	FirstMover string
+}
+
+// SetupDrawRow is one tile drawn in the first-move seeding (docs/ARCHITECTURE.md §6): the
+// round, the player (Name/AccountID, or "(opponent)" with an empty AccountID for an
+// auto-match synthetic draw not yet back-filled), the drawn letter (upper-cased; "?" for a
+// blank) and its draw rank.
+type SetupDrawRow struct {
+	Round     int
+	Name      string
+	AccountID string
+	Letter    string
+	Blank     bool
+	Rank      int
 }
 
 // SeatRow is one seat of a game. For a robot seat (IsRobot) RobotIntent is the game's
@@ -319,17 +389,27 @@ type BroadcastView struct {
 	ConnectorEnabled bool
 }
 
-// ThrottledView is the rate-limit observability page: the recent gateway-reported
-// throttle episodes (in-memory, reset on restart) and the accounts currently
-// carrying the high-rate flag. FlagThreshold and FlagWindow caption the active
-// auto-flag tuning.
+// ThrottledView is the rate-limit observability page: the temporary IP bans the
+// gateway is currently enforcing, the recent gateway-reported throttle episodes
+// (in-memory, reset on restart) and the accounts currently carrying the high-rate
+// flag. FlagThreshold and FlagWindow caption the active auto-flag tuning.
 type ThrottledView struct {
+	Bans          []BanRow
 	Episodes      []ThrottleEpisodeRow
 	Flagged       []FlaggedAccountRow
 	FlagThreshold int
 	FlagWindow    string
 }
 
+// BanRow is one temporary IP ban the gateway is enforcing, with its reason and its
+// since/expiry timestamps; the row carries an unban action.
+type BanRow struct {
+	IP      string
+	Reason  string
+	Since   string
+	Expires string
+}
+
 // ThrottleEpisodeRow is one recently throttled limiter key. UserID links to the
 // user card and is set only for the user class (the other classes key by IP).
 type ThrottleEpisodeRow struct {
@@ -368,6 +448,58 @@ type MessageView struct {
 	Back    string
 }
 
+// BannersView is the advertising-campaign list page.
+type BannersView struct {
+	Items []BannerCampaignRow
+}
+
+// BannerCampaignRow is one campaign in the list. Window is a human-readable
+// validity window ("perpetual" for the default); ActiveNow reports whether it
+// would rotate right now (enabled and within its window).
+type BannerCampaignRow struct {
+	ID        string
+	Name      string
+	Weight    int
+	IsDefault bool
+	Enabled   bool
+	Window    string
+	Messages  int
+	ActiveNow bool
+}
+
+// BannerDetailView is the campaign detail/edit page. StartsAt/EndsAt are the
+// "YYYY-MM-DDTHH:MM" (UTC) values for the datetime-local inputs, empty when open.
+type BannerDetailView struct {
+	ID        string
+	Name      string
+	Weight    int
+	IsDefault bool
+	Enabled   bool
+	StartsAt  string
+	EndsAt    string
+	Messages  []BannerMessageRow
+}
+
+// BannerMessageRow is one bilingual message of a campaign. First/Last drive the
+// reorder buttons (disabled at the ends).
+type BannerMessageRow struct {
+	ID     string
+	BodyEn string
+	BodyRu string
+	First  bool
+	Last   bool
+}
+
+// BannerSettingsView is the global display-timings form.
+type BannerSettingsView struct {
+	HoldMs         int
+	EdgePauseMs    int
+	ScrollPxPerSec int
+	FadeOutMs      int
+	GapMs          int
+	FadeInMs       int
+}
+
 // FeedbackView is the paginated user-feedback queue. Status is the active
 // unread/read/archived filter; NameMask/ExtMask are the sender glob filters;
 // UserID pins the list to one account (the per-user link from /users);
@@ -409,11 +541,8 @@ type FeedbackDetailView struct {
 	SenderName string
 	Source     string
 	Channel    string
-	// InterfaceLanguage is the sender's interface language (account preference);
-	// BotLanguage is the connector bot they last used (en/ru), set only for a
-	// message that arrived through an external connector (Telegram).
+	// InterfaceLanguage is the sender's interface language (account preference).
 	InterfaceLanguage string
-	BotLanguage       string
 	IP                string
 	Body              string
 	HasAttachment     bool
@@ -425,5 +554,17 @@ type FeedbackDetailView struct {
 	ReplyBody         string
 	RepliedAt         string
 	CreatedAt         string
-	Banned            bool
+	// Version is the client app build the report was sent from (empty for rows that predate it).
+	Version string
+	// The Filed time is shown in three zones so the operator can tell what is certainly known from
+	// what is merely defaulted. CreatedAt is the authoritative UTC time. CreatedAtBrowser is that
+	// instant in the client's UTC offset detected at submit (BrowserTZ its "±HH:MM" label), empty
+	// when the client reported none (an older build). CreatedAtUser is that instant in the sender's
+	// saved profile zone (UserTZ its label), empty when the account has no zone beyond the UTC
+	// default — the template then shows "N/A" so the missing datum is explicit.
+	CreatedAtBrowser string
+	BrowserTZ        string
+	CreatedAtUser    string
+	UserTZ           string
+	Banned           bool
 }

backend/internal/ads/ads.go

@@ -0,0 +1,188 @@
+// Package ads owns the server-driven advertising banner ("advertising network"):
+// operator-managed campaigns, their bilingual messages and the global display
+// timings the client's one-line announcement strip rotates through.
+//
+// A campaign is one placement order with a show weight (an integer percent).
+// Simultaneously active campaigns compete for display slots in proportion to
+// their weights; the single perpetual default campaign fills the unsold
+// remainder up to 100%. The actual rotation runs client-side (a smooth weighted
+// round-robin over campaigns, round-robin over a campaign's messages); the server
+// only computes the effective weighted, language-resolved set a viewer should
+// rotate, via ActiveSet. Who sees a banner at all is decided by Eligible.
+package ads
+
+import (
+	"errors"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+// ErrNotFound is returned when a campaign or message does not exist.
+var ErrNotFound = errors.New("ads: not found")
+
+// ErrDefaultImmutable is returned when an operation is refused on the perpetual
+// default campaign (it cannot be deleted, disabled, windowed, or have its
+// weight or default flag changed).
+var ErrDefaultImmutable = errors.New("ads: the default campaign cannot be modified that way")
+
+// ErrValidation wraps an operator-facing validation failure (a bad weight,
+// window or message body).
+var ErrValidation = errors.New("ads: validation")
+
+// Campaign is one advertising placement order with its messages.
+type Campaign struct {
+	ID        uuid.UUID // uuid.Nil on create
+	Name      string
+	Weight    int // show percent, 1..100; nominal (ignored) for the default
+	IsDefault bool
+	Enabled   bool
+	StartsAt  *time.Time // nil = open-ended start; always nil for the default
+	EndsAt    *time.Time // nil = open-ended end; always nil for the default
+	Messages  []Message
+	CreatedAt time.Time
+	UpdatedAt time.Time
+}
+
+// Message is one bilingual creative of a campaign. Both bodies are mandatory;
+// the client shows the variant for the viewer's bot (service) language. Position
+// orders the messages within a campaign (the round-robin order).
+type Message struct {
+	ID         uuid.UUID // uuid.Nil on create
+	CampaignID uuid.UUID
+	Position   int
+	BodyEn     string
+	BodyRu     string
+}
+
+// Timings are the global banner display timings, in milliseconds except
+// ScrollPxPerSec. HoldMs is how long one message shows; EdgePauseMs and
+// ScrollPxPerSec drive the scroll of a message wider than the strip; a
+// transition between messages is FadeOutMs then GapMs then FadeInMs.
+type Timings struct {
+	HoldMs         int
+	EdgePauseMs    int
+	ScrollPxPerSec int
+	FadeOutMs      int
+	GapMs          int
+	FadeInMs       int
+}
+
+// ActiveCampaign is one campaign in the resolved rotation feed sent to a client:
+// its GCD-reduced show weight and its messages, already resolved to the viewer's
+// language and in display (round-robin) order.
+type ActiveCampaign struct {
+	Weight   int
+	Messages []string
+}
+
+// Eligible reports whether an account should be shown the advertising banner: a
+// free account (not paid) with an empty hint wallet and without the no_banner
+// role. The no_banner role suppresses the banner unconditionally; buying a paid
+// account or any hints also removes it.
+func Eligible(paidAccount bool, hintBalance int, hasNoBanner bool) bool {
+	return !paidAccount && hintBalance <= 0 && !hasNoBanner
+}
+
+// computeActiveSet builds the resolved rotation feed from the enabled campaigns
+// at time now, in language lang. Campaigns outside their validity window, and
+// campaigns with no messages, are dropped. The default campaign's effective
+// weight is the remainder up to 100% — max(0, 100 - sum of active timed
+// weights) — so it fills unsold inventory and is dropped entirely when timed
+// campaigns already reach 100%. Weights are then reduced by their GCD so the
+// fair rotation cycle stays short. The input is expected to be the enabled
+// campaigns (ActiveCampaigns); disabled ones must already be excluded.
+func computeActiveSet(campaigns []Campaign, now time.Time, lang string) []ActiveCampaign {
+	var timed []Campaign
+	var def *Campaign
+	for i := range campaigns {
+		c := campaigns[i]
+		if len(c.Messages) == 0 {
+			continue // a campaign with no creative cannot fill a slot
+		}
+		if c.IsDefault {
+			def = &campaigns[i]
+			continue
+		}
+		if withinWindow(c, now) {
+			timed = append(timed, c)
+		}
+	}
+	sumTimed := 0
+	for _, c := range timed {
+		sumTimed += c.Weight
+	}
+	out := make([]ActiveCampaign, 0, len(timed)+1)
+	for _, c := range timed {
+		out = append(out, ActiveCampaign{Weight: c.Weight, Messages: resolveBodies(c.Messages, lang)})
+	}
+	if def != nil {
+		if dw := 100 - sumTimed; dw > 0 {
+			out = append(out, ActiveCampaign{Weight: dw, Messages: resolveBodies(def.Messages, lang)})
+		}
+	}
+	reduceByGCD(out)
+	return out
+}
+
+// ActiveAt reports whether the campaign would rotate at time now: enabled, and
+// either the perpetual default or within its validity window. It mirrors the
+// filter computeActiveSet applies (a campaign with no messages still reports
+// active here — that is a content gap the console surfaces, not an inactive
+// campaign).
+func (c Campaign) ActiveAt(now time.Time) bool {
+	return c.Enabled && (c.IsDefault || withinWindow(c, now))
+}
+
+// withinWindow reports whether now lies inside the campaign's validity window. A
+// nil bound is open-ended on that side.
+func withinWindow(c Campaign, now time.Time) bool {
+	if c.StartsAt != nil && now.Before(*c.StartsAt) {
+		return false
+	}
+	if c.EndsAt != nil && now.After(*c.EndsAt) {
+		return false
+	}
+	return true
+}
+
+// resolveBodies projects each message to the body for lang ("ru" picks the
+// Russian body; anything else picks English), preserving display order.
+func resolveBodies(msgs []Message, lang string) []string {
+	out := make([]string, len(msgs))
+	for i, m := range msgs {
+		if lang == "ru" {
+			out[i] = m.BodyRu
+		} else {
+			out[i] = m.BodyEn
+		}
+	}
+	return out
+}
+
+// reduceByGCD divides every weight by the greatest common divisor of all weights
+// (in place), shrinking a {50,30,20} set to {5,3,2} and a lone {100} to {1}. A
+// no-op when the set is empty or already coprime.
+func reduceByGCD(cs []ActiveCampaign) {
+	g := 0
+	for _, c := range cs {
+		g = gcd(g, c.Weight)
+	}
+	if g <= 1 {
+		return
+	}
+	for i := range cs {
+		cs[i].Weight /= g
+	}
+}
+
+// gcd returns the greatest common divisor of a and b (gcd(0, n) == n).
+func gcd(a, b int) int {
+	for b != 0 {
+		a, b = b, a%b
+	}
+	if a < 0 {
+		return -a
+	}
+	return a
+}

backend/internal/ads/ads_test.go

@@ -0,0 +1,183 @@
+package ads
+
+import (
+	"reflect"
+	"testing"
+	"time"
+)
+
+func TestEligible(t *testing.T) {
+	tests := []struct {
+		name        string
+		paidAccount bool
+		hintBalance int
+		hasNoBanner bool
+		want        bool
+	}{
+		{name: "free, empty wallet, no role", want: true},
+		{name: "paid", paidAccount: true, want: false},
+		{name: "has hints", hintBalance: 3, want: false},
+		{name: "no_banner role", hasNoBanner: true, want: false},
+		{name: "paid and has hints", paidAccount: true, hintBalance: 5, want: false},
+		{name: "no_banner overrides everything", hasNoBanner: true, want: false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := Eligible(tt.paidAccount, tt.hintBalance, tt.hasNoBanner); got != tt.want {
+				t.Errorf("Eligible(%v,%d,%v) = %v, want %v", tt.paidAccount, tt.hintBalance, tt.hasNoBanner, got, tt.want)
+			}
+		})
+	}
+}
+
+func TestComputeActiveSet(t *testing.T) {
+	now := time.Date(2026, 6, 15, 12, 0, 0, 0, time.UTC)
+	past := now.Add(-24 * time.Hour)
+	future := now.Add(24 * time.Hour)
+
+	// msg builds a one-message slice with distinct bodies so resolution and
+	// campaign identity are visible in assertions.
+	msg := func(tag string) []Message {
+		return []Message{{BodyEn: tag + "-en", BodyRu: tag + "-ru"}}
+	}
+	def := func(msgs []Message) Campaign {
+		return Campaign{Name: "default", Weight: 100, IsDefault: true, Enabled: true, Messages: msgs}
+	}
+	timed := func(name string, weight int, starts, ends *time.Time, msgs []Message) Campaign {
+		return Campaign{Name: name, Weight: weight, Enabled: true, StartsAt: starts, EndsAt: ends, Messages: msgs}
+	}
+
+	tests := []struct {
+		name      string
+		campaigns []Campaign
+		lang      string
+		want      []ActiveCampaign
+	}{
+		{
+			name:      "default only reduces to weight 1",
+			campaigns: []Campaign{def(msg("house"))},
+			lang:      "en",
+			want:      []ActiveCampaign{{Weight: 1, Messages: []string{"house-en"}}},
+		},
+		{
+			name:      "default fills the remainder",
+			campaigns: []Campaign{def(msg("house")), timed("promo", 30, nil, nil, msg("promo"))},
+			lang:      "en",
+			// timed 30, default 100-30=70; gcd 10 -> 3 and 7; timed first, default last.
+			want: []ActiveCampaign{
+				{Weight: 3, Messages: []string{"promo-en"}},
+				{Weight: 7, Messages: []string{"house-en"}},
+			},
+		},
+		{
+			name:      "timed fills 100, default dropped",
+			campaigns: []Campaign{def(msg("house")), timed("promo", 100, nil, nil, msg("promo"))},
+			lang:      "en",
+			want:      []ActiveCampaign{{Weight: 1, Messages: []string{"promo-en"}}},
+		},
+		{
+			name: "timed over 100, default dropped, proportional",
+			campaigns: []Campaign{
+				def(msg("house")),
+				timed("a", 60, nil, nil, msg("a")),
+				timed("b", 80, nil, nil, msg("b")),
+			},
+			lang: "en",
+			// default dropped (sum 140 >= 100); gcd(60,80)=20 -> 3 and 4.
+			want: []ActiveCampaign{
+				{Weight: 3, Messages: []string{"a-en"}},
+				{Weight: 4, Messages: []string{"b-en"}},
+			},
+		},
+		{
+			name: "future and past windows exclude timed",
+			campaigns: []Campaign{
+				def(msg("house")),
+				timed("future", 50, &future, nil, msg("future")),
+				timed("past", 50, nil, &past, msg("past")),
+			},
+			lang: "en",
+			want: []ActiveCampaign{{Weight: 1, Messages: []string{"house-en"}}},
+		},
+		{
+			name: "active window included",
+			campaigns: []Campaign{
+				def(msg("house")),
+				timed("live", 25, &past, &future, msg("live")),
+			},
+			lang: "en",
+			// timed 25, default 75; gcd 25 -> 1 and 3.
+			want: []ActiveCampaign{
+				{Weight: 1, Messages: []string{"live-en"}},
+				{Weight: 3, Messages: []string{"house-en"}},
+			},
+		},
+		{
+			name: "campaign without messages is skipped and not counted",
+			campaigns: []Campaign{
+				def(msg("house")),
+				timed("empty", 40, nil, nil, nil),
+			},
+			lang: "en",
+			// empty campaign skipped; default fills full 100 -> reduced to 1.
+			want: []ActiveCampaign{{Weight: 1, Messages: []string{"house-en"}}},
+		},
+		{
+			name:      "russian bodies resolved",
+			campaigns: []Campaign{def(msg("house"))},
+			lang:      "ru",
+			want:      []ActiveCampaign{{Weight: 1, Messages: []string{"house-ru"}}},
+		},
+		{
+			name: "three timed split by gcd",
+			campaigns: []Campaign{
+				def(msg("house")),
+				timed("a", 50, nil, nil, msg("a")),
+				timed("b", 30, nil, nil, msg("b")),
+				timed("c", 20, nil, nil, msg("c")),
+			},
+			lang: "en",
+			// sum 100, default dropped; gcd 10 -> 5,3,2.
+			want: []ActiveCampaign{
+				{Weight: 5, Messages: []string{"a-en"}},
+				{Weight: 3, Messages: []string{"b-en"}},
+				{Weight: 2, Messages: []string{"c-en"}},
+			},
+		},
+		{
+			name: "campaign with multiple messages keeps order",
+			campaigns: []Campaign{
+				def([]Message{{BodyEn: "one-en", BodyRu: "one-ru"}, {BodyEn: "two-en", BodyRu: "two-ru"}}),
+			},
+			lang: "en",
+			want: []ActiveCampaign{{Weight: 1, Messages: []string{"one-en", "two-en"}}},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := computeActiveSet(tt.campaigns, now, tt.lang)
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("computeActiveSet() =\n  %#v\nwant\n  %#v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestComputeActiveSetEmpty(t *testing.T) {
+	// No campaigns at all yields an empty (non-nil-or-nil) feed without panicking.
+	if got := computeActiveSet(nil, time.Now(), "en"); len(got) != 0 {
+		t.Errorf("computeActiveSet(nil) = %#v, want empty", got)
+	}
+}
+
+func TestGCD(t *testing.T) {
+	tests := []struct{ a, b, want int }{
+		{0, 5, 5}, {5, 0, 5}, {12, 18, 6}, {100, 100, 100}, {7, 13, 1},
+	}
+	for _, tt := range tests {
+		if got := gcd(tt.a, tt.b); got != tt.want {
+			t.Errorf("gcd(%d,%d) = %d, want %d", tt.a, tt.b, got, tt.want)
+		}
+	}
+}

backend/internal/ads/service.go

@@ -0,0 +1,290 @@
+package ads
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+)
+
+// Operator-input bounds and the display-timing clamps. The timings are clamped
+// (not rejected) on update so the client rotator can never be driven into a
+// broken state by a typo in the console.
+const (
+	maxCampaignName = 80
+	maxMessageBody  = 500
+
+	minHoldMs = 3000   // 3s — below this the fade transition would dominate
+	maxHoldMs = 600000 // 10 min
+
+	maxEdgePauseMs = 60000
+
+	minScrollPxPerSec = 5
+	maxScrollPxPerSec = 1000
+
+	maxFadeMs = 5000
+)
+
+// Service is the domain layer over Store: it validates operator input, enforces
+// the default campaign's invariants, clamps the display timings, and assembles
+// the resolved rotation feed (ActiveSet) for a viewer.
+type Service struct {
+	store *Store
+}
+
+// NewService constructs a Service over store.
+func NewService(store *Store) *Service { return &Service{store: store} }
+
+// ActiveSet returns the resolved rotation feed for a viewer in language lang
+// (en/ru) together with the global display timings: the currently-active
+// campaigns, each with its GCD-reduced show weight and its messages resolved to
+// lang, ready for the client's weighted round-robin.
+func (s *Service) ActiveSet(ctx context.Context, lang string) ([]ActiveCampaign, Timings, error) {
+	campaigns, err := s.store.ActiveCampaigns(ctx)
+	if err != nil {
+		return nil, Timings{}, err
+	}
+	timings, err := s.store.Settings(ctx)
+	if err != nil {
+		return nil, Timings{}, err
+	}
+	return computeActiveSet(campaigns, time.Now().UTC(), lang), timings, nil
+}
+
+// ListCampaigns returns every campaign with its messages, for the admin console.
+func (s *Service) ListCampaigns(ctx context.Context) ([]Campaign, error) {
+	return s.store.ListCampaigns(ctx)
+}
+
+// Campaign returns one campaign with its messages, or ErrNotFound.
+func (s *Service) Campaign(ctx context.Context, id uuid.UUID) (Campaign, error) {
+	return s.store.Campaign(ctx, id)
+}
+
+// CreateCampaign validates and creates a new time-limited campaign (never the
+// default) and returns its id.
+func (s *Service) CreateCampaign(ctx context.Context, c Campaign) (uuid.UUID, error) {
+	name, err := validName(c.Name)
+	if err != nil {
+		return uuid.Nil, err
+	}
+	if err := validWeight(c.Weight); err != nil {
+		return uuid.Nil, err
+	}
+	if err := validWindow(c.StartsAt, c.EndsAt); err != nil {
+		return uuid.Nil, err
+	}
+	return s.store.CreateCampaign(ctx, Campaign{
+		Name: name, Weight: c.Weight, Enabled: c.Enabled, StartsAt: c.StartsAt, EndsAt: c.EndsAt,
+	})
+}
+
+// UpdateCampaign validates and updates a campaign. The default campaign keeps its
+// weight (nominal), enabled flag and (empty) window — only its name is editable;
+// any submitted weight/window/enabled are ignored for it.
+func (s *Service) UpdateCampaign(ctx context.Context, c Campaign) error {
+	existing, err := s.store.Campaign(ctx, c.ID)
+	if err != nil {
+		return err
+	}
+	name, err := validName(c.Name)
+	if err != nil {
+		return err
+	}
+	upd := Campaign{ID: existing.ID, Name: name}
+	if existing.IsDefault {
+		upd.Weight = existing.Weight
+		upd.Enabled = true
+		upd.StartsAt = nil
+		upd.EndsAt = nil
+	} else {
+		if err := validWeight(c.Weight); err != nil {
+			return err
+		}
+		if err := validWindow(c.StartsAt, c.EndsAt); err != nil {
+			return err
+		}
+		upd.Weight = c.Weight
+		upd.Enabled = c.Enabled
+		upd.StartsAt = c.StartsAt
+		upd.EndsAt = c.EndsAt
+	}
+	return s.store.UpdateCampaign(ctx, upd)
+}
+
+// DeleteCampaign removes a campaign, refusing the perpetual default.
+func (s *Service) DeleteCampaign(ctx context.Context, id uuid.UUID) error {
+	existing, err := s.store.Campaign(ctx, id)
+	if err != nil {
+		return err
+	}
+	if existing.IsDefault {
+		return ErrDefaultImmutable
+	}
+	return s.store.DeleteCampaign(ctx, id)
+}
+
+// AddMessage validates a bilingual message and appends it to a campaign.
+func (s *Service) AddMessage(ctx context.Context, campaignID uuid.UUID, bodyEn, bodyRu string) (uuid.UUID, error) {
+	en, ru, err := validBodies(bodyEn, bodyRu)
+	if err != nil {
+		return uuid.Nil, err
+	}
+	c, err := s.store.Campaign(ctx, campaignID)
+	if err != nil {
+		return uuid.Nil, err
+	}
+	return s.store.AddMessage(ctx, Message{CampaignID: campaignID, Position: len(c.Messages), BodyEn: en, BodyRu: ru})
+}
+
+// EditMessage validates and updates the bilingual bodies of a message that
+// belongs to campaignID (its position is unchanged). It returns ErrNotFound when
+// the message is not part of that campaign, so a mismatched campaign/message pair
+// never edits an unrelated campaign's message.
+func (s *Service) EditMessage(ctx context.Context, campaignID, messageID uuid.UUID, bodyEn, bodyRu string) error {
+	en, ru, err := validBodies(bodyEn, bodyRu)
+	if err != nil {
+		return err
+	}
+	c, err := s.store.Campaign(ctx, campaignID)
+	if err != nil {
+		return err
+	}
+	if !campaignOwnsMessage(c, messageID) {
+		return ErrNotFound
+	}
+	return s.store.UpdateMessageBodies(ctx, messageID, en, ru)
+}
+
+// MoveMessage reorders a message within its campaign by swapping its position
+// with the adjacent message in direction dir (-1 up, +1 down). A move past an
+// edge is a no-op.
+func (s *Service) MoveMessage(ctx context.Context, campaignID, messageID uuid.UUID, dir int) error {
+	c, err := s.store.Campaign(ctx, campaignID)
+	if err != nil {
+		return err
+	}
+	idx := -1
+	for i, m := range c.Messages {
+		if m.ID == messageID {
+			idx = i
+			break
+		}
+	}
+	if idx < 0 {
+		return ErrNotFound
+	}
+	j := idx + dir
+	if j < 0 || j >= len(c.Messages) {
+		return nil // already at the edge
+	}
+	a, b := c.Messages[idx], c.Messages[j]
+	if err := s.store.SetMessagePosition(ctx, a.ID, j); err != nil {
+		return err
+	}
+	return s.store.SetMessagePosition(ctx, b.ID, idx)
+}
+
+// DeleteMessage removes a message that belongs to campaignID, refusing to remove
+// the default campaign's last remaining message (the default must always have a
+// creative to show). It returns ErrNotFound when the message is not part of that
+// campaign — so a mismatched campaign/message pair can neither delete an
+// unrelated campaign's message nor bypass the default's last-message guard.
+func (s *Service) DeleteMessage(ctx context.Context, campaignID, messageID uuid.UUID) error {
+	c, err := s.store.Campaign(ctx, campaignID)
+	if err != nil {
+		return err
+	}
+	if !campaignOwnsMessage(c, messageID) {
+		return ErrNotFound
+	}
+	if c.IsDefault && len(c.Messages) <= 1 {
+		return fmt.Errorf("%w: the default campaign must keep at least one message", ErrValidation)
+	}
+	return s.store.DeleteMessage(ctx, messageID)
+}
+
+// campaignOwnsMessage reports whether messageID is one of the campaign's messages.
+func campaignOwnsMessage(c Campaign, messageID uuid.UUID) bool {
+	for _, m := range c.Messages {
+		if m.ID == messageID {
+			return true
+		}
+	}
+	return false
+}
+
+// Settings returns the global display timings.
+func (s *Service) Settings(ctx context.Context) (Timings, error) {
+	return s.store.Settings(ctx)
+}
+
+// UpdateSettings clamps every timing into its safe range and stores them.
+func (s *Service) UpdateSettings(ctx context.Context, t Timings) error {
+	return s.store.UpdateSettings(ctx, clampTimings(t))
+}
+
+// validName trims and bounds a campaign name.
+func validName(name string) (string, error) {
+	name = strings.TrimSpace(name)
+	if name == "" {
+		return "", fmt.Errorf("%w: the campaign name is required", ErrValidation)
+	}
+	if len([]rune(name)) > maxCampaignName {
+		return "", fmt.Errorf("%w: the campaign name must be at most %d characters", ErrValidation, maxCampaignName)
+	}
+	return name, nil
+}
+
+// validWeight bounds a campaign show weight to the 1..100 percent range.
+func validWeight(w int) error {
+	if w < 1 || w > 100 {
+		return fmt.Errorf("%w: the weight must be a percent between 1 and 100", ErrValidation)
+	}
+	return nil
+}
+
+// validWindow rejects an inverted validity window.
+func validWindow(starts, ends *time.Time) error {
+	if starts != nil && ends != nil && ends.Before(*starts) {
+		return fmt.Errorf("%w: the end must not precede the start", ErrValidation)
+	}
+	return nil
+}
+
+// validBodies trims and bounds both mandatory language bodies of a message.
+func validBodies(bodyEn, bodyRu string) (string, string, error) {
+	en := strings.TrimSpace(bodyEn)
+	ru := strings.TrimSpace(bodyRu)
+	if en == "" || ru == "" {
+		return "", "", fmt.Errorf("%w: both the English and Russian message bodies are required", ErrValidation)
+	}
+	if len([]rune(en)) > maxMessageBody || len([]rune(ru)) > maxMessageBody {
+		return "", "", fmt.Errorf("%w: a message body must be at most %d characters", ErrValidation, maxMessageBody)
+	}
+	return en, ru, nil
+}
+
+// clampTimings forces every display timing into its safe range.
+func clampTimings(t Timings) Timings {
+	return Timings{
+		HoldMs:         clampInt(t.HoldMs, minHoldMs, maxHoldMs),
+		EdgePauseMs:    clampInt(t.EdgePauseMs, 0, maxEdgePauseMs),
+		ScrollPxPerSec: clampInt(t.ScrollPxPerSec, minScrollPxPerSec, maxScrollPxPerSec),
+		FadeOutMs:      clampInt(t.FadeOutMs, 0, maxFadeMs),
+		GapMs:          clampInt(t.GapMs, 0, maxFadeMs),
+		FadeInMs:       clampInt(t.FadeInMs, 0, maxFadeMs),
+	}
+}
+
+func clampInt(v, lo, hi int) int {
+	if v < lo {
+		return lo
+	}
+	if v > hi {
+		return hi
+	}
+	return v
+}

backend/internal/ads/store.go

@@ -0,0 +1,289 @@
+package ads
+
+import (
+	"context"
+	"database/sql"
+	"errors"
+	"fmt"
+	"time"
+
+	"github.com/go-jet/jet/v2/postgres"
+	"github.com/go-jet/jet/v2/qrm"
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/postgres/jet/backend/model"
+	"scrabble/backend/internal/postgres/jet/backend/table"
+)
+
+// Store is the Postgres-backed query surface for advertising campaigns, their
+// messages and the single global display-settings row.
+type Store struct {
+	db *sql.DB
+}
+
+// NewStore constructs a Store wrapping db.
+func NewStore(db *sql.DB) *Store { return &Store{db: db} }
+
+// ListCampaigns returns every campaign with its messages, the default first then
+// by creation time, for the admin console.
+func (s *Store) ListCampaigns(ctx context.Context) ([]Campaign, error) {
+	return s.loadCampaigns(ctx, false)
+}
+
+// ActiveCampaigns returns the enabled campaigns with their messages, the default
+// first then by creation time. Window filtering and the default-remainder weight
+// are applied by the Service (ActiveSet), not here.
+func (s *Store) ActiveCampaigns(ctx context.Context) ([]Campaign, error) {
+	return s.loadCampaigns(ctx, true)
+}
+
+// loadCampaigns reads campaigns (optionally only the enabled ones) and attaches
+// each one's messages in display order, with a single messages query (the table
+// is small, so this avoids both an N+1 and a join projection).
+func (s *Store) loadCampaigns(ctx context.Context, enabledOnly bool) ([]Campaign, error) {
+	sel := postgres.SELECT(table.AdCampaigns.AllColumns).FROM(table.AdCampaigns)
+	if enabledOnly {
+		sel = sel.WHERE(table.AdCampaigns.Enabled.EQ(postgres.Bool(true)))
+	}
+	sel = sel.ORDER_BY(table.AdCampaigns.IsDefault.DESC(), table.AdCampaigns.CreatedAt.ASC())
+
+	var rows []model.AdCampaigns
+	if err := sel.QueryContext(ctx, s.db, &rows); err != nil {
+		return nil, fmt.Errorf("ads: list campaigns: %w", err)
+	}
+	byID, err := s.messagesByCampaign(ctx)
+	if err != nil {
+		return nil, err
+	}
+	out := make([]Campaign, 0, len(rows))
+	for _, r := range rows {
+		c := modelToCampaign(r)
+		c.Messages = byID[r.CampaignID]
+		out = append(out, c)
+	}
+	return out, nil
+}
+
+// Campaign returns one campaign with its messages, or ErrNotFound.
+func (s *Store) Campaign(ctx context.Context, id uuid.UUID) (Campaign, error) {
+	sel := postgres.SELECT(table.AdCampaigns.AllColumns).
+		FROM(table.AdCampaigns).
+		WHERE(table.AdCampaigns.CampaignID.EQ(postgres.UUID(id))).
+		LIMIT(1)
+	var row model.AdCampaigns
+	if err := sel.QueryContext(ctx, s.db, &row); err != nil {
+		if errors.Is(err, qrm.ErrNoRows) {
+			return Campaign{}, ErrNotFound
+		}
+		return Campaign{}, fmt.Errorf("ads: get campaign %s: %w", id, err)
+	}
+	c := modelToCampaign(row)
+	msgs, err := s.messagesFor(ctx, id)
+	if err != nil {
+		return Campaign{}, err
+	}
+	c.Messages = msgs
+	return c, nil
+}
+
+// CreateCampaign inserts a campaign (always non-default) and returns its new id.
+func (s *Store) CreateCampaign(ctx context.Context, c Campaign) (uuid.UUID, error) {
+	id := uuid.New()
+	now := time.Now().UTC()
+	stmt := table.AdCampaigns.INSERT(
+		table.AdCampaigns.CampaignID, table.AdCampaigns.Name, table.AdCampaigns.Weight,
+		table.AdCampaigns.IsDefault, table.AdCampaigns.Enabled,
+		table.AdCampaigns.StartsAt, table.AdCampaigns.EndsAt,
+		table.AdCampaigns.CreatedAt, table.AdCampaigns.UpdatedAt,
+	).VALUES(
+		postgres.UUID(id), postgres.String(c.Name), postgres.Int(int64(c.Weight)),
+		postgres.Bool(false), postgres.Bool(c.Enabled),
+		tsOrNull(c.StartsAt), tsOrNull(c.EndsAt),
+		postgres.TimestampzT(now), postgres.TimestampzT(now),
+	)
+	if _, err := stmt.ExecContext(ctx, s.db); err != nil {
+		return uuid.Nil, fmt.Errorf("ads: create campaign: %w", err)
+	}
+	return id, nil
+}
+
+// UpdateCampaign updates a campaign's name, weight, enabled flag and validity
+// window. The default flag is never touched here. Returns ErrNotFound when no
+// campaign matches.
+func (s *Store) UpdateCampaign(ctx context.Context, c Campaign) error {
+	stmt := table.AdCampaigns.UPDATE(
+		table.AdCampaigns.Name, table.AdCampaigns.Weight, table.AdCampaigns.Enabled,
+		table.AdCampaigns.StartsAt, table.AdCampaigns.EndsAt, table.AdCampaigns.UpdatedAt,
+	).SET(
+		postgres.String(c.Name), postgres.Int(int64(c.Weight)), postgres.Bool(c.Enabled),
+		tsOrNull(c.StartsAt), tsOrNull(c.EndsAt), postgres.TimestampzT(time.Now().UTC()),
+	).WHERE(table.AdCampaigns.CampaignID.EQ(postgres.UUID(c.ID)))
+	return execOne(ctx, s.db, stmt, "update campaign")
+}
+
+// DeleteCampaign removes a campaign (its messages cascade). Returns ErrNotFound
+// when no campaign matches. The Service refuses to delete the default.
+func (s *Store) DeleteCampaign(ctx context.Context, id uuid.UUID) error {
+	stmt := table.AdCampaigns.DELETE().WHERE(table.AdCampaigns.CampaignID.EQ(postgres.UUID(id)))
+	return execOne(ctx, s.db, stmt, "delete campaign")
+}
+
+// AddMessage inserts a message into a campaign and returns its new id.
+func (s *Store) AddMessage(ctx context.Context, m Message) (uuid.UUID, error) {
+	id := uuid.New()
+	now := time.Now().UTC()
+	stmt := table.AdMessages.INSERT(
+		table.AdMessages.MessageID, table.AdMessages.CampaignID, table.AdMessages.Position,
+		table.AdMessages.BodyEn, table.AdMessages.BodyRu,
+		table.AdMessages.CreatedAt, table.AdMessages.UpdatedAt,
+	).VALUES(
+		postgres.UUID(id), postgres.UUID(m.CampaignID), postgres.Int(int64(m.Position)),
+		postgres.String(m.BodyEn), postgres.String(m.BodyRu),
+		postgres.TimestampzT(now), postgres.TimestampzT(now),
+	)
+	if _, err := stmt.ExecContext(ctx, s.db); err != nil {
+		return uuid.Nil, fmt.Errorf("ads: add message: %w", err)
+	}
+	return id, nil
+}
+
+// UpdateMessageBodies updates a message's bilingual bodies (its position is
+// unchanged). Returns ErrNotFound when no message matches.
+func (s *Store) UpdateMessageBodies(ctx context.Context, id uuid.UUID, bodyEn, bodyRu string) error {
+	stmt := table.AdMessages.UPDATE(
+		table.AdMessages.BodyEn, table.AdMessages.BodyRu, table.AdMessages.UpdatedAt,
+	).SET(
+		postgres.String(bodyEn), postgres.String(bodyRu), postgres.TimestampzT(time.Now().UTC()),
+	).WHERE(table.AdMessages.MessageID.EQ(postgres.UUID(id)))
+	return execOne(ctx, s.db, stmt, "update message")
+}
+
+// SetMessagePosition updates only a message's position (used to reorder).
+func (s *Store) SetMessagePosition(ctx context.Context, id uuid.UUID, position int) error {
+	stmt := table.AdMessages.UPDATE(table.AdMessages.Position, table.AdMessages.UpdatedAt).
+		SET(postgres.Int(int64(position)), postgres.TimestampzT(time.Now().UTC())).
+		WHERE(table.AdMessages.MessageID.EQ(postgres.UUID(id)))
+	return execOne(ctx, s.db, stmt, "reorder message")
+}
+
+// DeleteMessage removes a message. Returns ErrNotFound when no message matches.
+func (s *Store) DeleteMessage(ctx context.Context, id uuid.UUID) error {
+	stmt := table.AdMessages.DELETE().WHERE(table.AdMessages.MessageID.EQ(postgres.UUID(id)))
+	return execOne(ctx, s.db, stmt, "delete message")
+}
+
+// Settings returns the global display timings.
+func (s *Store) Settings(ctx context.Context) (Timings, error) {
+	sel := postgres.SELECT(table.AdSettings.AllColumns).FROM(table.AdSettings).LIMIT(1)
+	var row model.AdSettings
+	if err := sel.QueryContext(ctx, s.db, &row); err != nil {
+		return Timings{}, fmt.Errorf("ads: get settings: %w", err)
+	}
+	return Timings{
+		HoldMs:         int(row.HoldMs),
+		EdgePauseMs:    int(row.EdgePauseMs),
+		ScrollPxPerSec: int(row.ScrollPxPerSec),
+		FadeOutMs:      int(row.FadeOutMs),
+		GapMs:          int(row.GapMs),
+		FadeInMs:       int(row.FadeInMs),
+	}, nil
+}
+
+// UpdateSettings overwrites the single global display-settings row.
+func (s *Store) UpdateSettings(ctx context.Context, t Timings) error {
+	stmt := table.AdSettings.UPDATE(
+		table.AdSettings.HoldMs, table.AdSettings.EdgePauseMs, table.AdSettings.ScrollPxPerSec,
+		table.AdSettings.FadeOutMs, table.AdSettings.GapMs, table.AdSettings.FadeInMs, table.AdSettings.UpdatedAt,
+	).SET(
+		postgres.Int(int64(t.HoldMs)), postgres.Int(int64(t.EdgePauseMs)), postgres.Int(int64(t.ScrollPxPerSec)),
+		postgres.Int(int64(t.FadeOutMs)), postgres.Int(int64(t.GapMs)), postgres.Int(int64(t.FadeInMs)),
+		postgres.TimestampzT(time.Now().UTC()),
+	).WHERE(table.AdSettings.ID.EQ(postgres.Bool(true)))
+	if _, err := stmt.ExecContext(ctx, s.db); err != nil {
+		return fmt.Errorf("ads: update settings: %w", err)
+	}
+	return nil
+}
+
+// messagesByCampaign loads every message grouped by campaign id, in display order.
+func (s *Store) messagesByCampaign(ctx context.Context) (map[uuid.UUID][]Message, error) {
+	sel := postgres.SELECT(table.AdMessages.AllColumns).
+		FROM(table.AdMessages).
+		ORDER_BY(table.AdMessages.CampaignID.ASC(), table.AdMessages.Position.ASC(), table.AdMessages.CreatedAt.ASC())
+	var rows []model.AdMessages
+	if err := sel.QueryContext(ctx, s.db, &rows); err != nil {
+		return nil, fmt.Errorf("ads: list messages: %w", err)
+	}
+	out := make(map[uuid.UUID][]Message, len(rows))
+	for _, r := range rows {
+		out[r.CampaignID] = append(out[r.CampaignID], modelToMessage(r))
+	}
+	return out, nil
+}
+
+// messagesFor loads one campaign's messages in display order.
+func (s *Store) messagesFor(ctx context.Context, campaignID uuid.UUID) ([]Message, error) {
+	sel := postgres.SELECT(table.AdMessages.AllColumns).
+		FROM(table.AdMessages).
+		WHERE(table.AdMessages.CampaignID.EQ(postgres.UUID(campaignID))).
+		ORDER_BY(table.AdMessages.Position.ASC(), table.AdMessages.CreatedAt.ASC())
+	var rows []model.AdMessages
+	if err := sel.QueryContext(ctx, s.db, &rows); err != nil {
+		return nil, fmt.Errorf("ads: list messages for %s: %w", campaignID, err)
+	}
+	out := make([]Message, 0, len(rows))
+	for _, r := range rows {
+		out = append(out, modelToMessage(r))
+	}
+	return out, nil
+}
+
+// execOne runs a statement expected to touch exactly one row, mapping a zero
+// row-count to ErrNotFound.
+func execOne(ctx context.Context, db qrm.Executable, stmt postgres.Statement, what string) error {
+	res, err := stmt.ExecContext(ctx, db)
+	if err != nil {
+		return fmt.Errorf("ads: %s: %w", what, err)
+	}
+	n, err := res.RowsAffected()
+	if err != nil {
+		return fmt.Errorf("ads: %s rows: %w", what, err)
+	}
+	if n == 0 {
+		return ErrNotFound
+	}
+	return nil
+}
+
+func modelToCampaign(r model.AdCampaigns) Campaign {
+	return Campaign{
+		ID:        r.CampaignID,
+		Name:      r.Name,
+		Weight:    int(r.Weight),
+		IsDefault: r.IsDefault,
+		Enabled:   r.Enabled,
+		StartsAt:  r.StartsAt,
+		EndsAt:    r.EndsAt,
+		CreatedAt: r.CreatedAt,
+		UpdatedAt: r.UpdatedAt,
+	}
+}
+
+func modelToMessage(r model.AdMessages) Message {
+	return Message{
+		ID:         r.MessageID,
+		CampaignID: r.CampaignID,
+		Position:   int(r.Position),
+		BodyEn:     r.BodyEn,
+		BodyRu:     r.BodyRu,
+	}
+}
+
+// tsOrNull renders a nullable validity-window bound: NULL for a nil pointer,
+// otherwise the UTC timestamp.
+func tsOrNull(t *time.Time) postgres.Expression {
+	if t == nil {
+		return postgres.NULL
+	}
+	return postgres.TimestampzT(t.UTC())
+}

backend/internal/banview/banview.go

@@ -0,0 +1,92 @@
+// Package banview mirrors the gateway's active IP bans for the admin console and
+// collects operator unban requests for the gateway to apply. Like ratewatch it is
+// in-memory, single-instance and resets on a backend restart by design — the
+// gateway re-reports its active set on the next sync, and the durable effect (the
+// ban itself) lives in the gateway, not here.
+package banview
+
+import (
+	"sort"
+	"sync"
+	"time"
+)
+
+// Ban is one active IP ban as reported by the gateway.
+type Ban struct {
+	IP      string
+	Reason  string
+	Since   time.Time
+	Expires time.Time
+}
+
+// View holds the last-reported active bans and the operator's pending unbans.
+type View struct {
+	now func() time.Time
+
+	mu    sync.Mutex
+	bans  map[string]Ban      // last reported active set, keyed by IP
+	unban map[string]struct{} // IPs an operator marked for unban
+}
+
+// New constructs an empty View.
+func New() *View {
+	return &View{now: time.Now, bans: make(map[string]Ban), unban: make(map[string]struct{})}
+}
+
+// Ingest replaces the mirrored active set with the gateway's latest report,
+// skipping entries with an empty IP or one that has already expired.
+func (v *View) Ingest(active []Ban) {
+	now := v.now()
+	v.mu.Lock()
+	defer v.mu.Unlock()
+	v.bans = make(map[string]Ban, len(active))
+	for _, b := range active {
+		if b.IP == "" || !now.Before(b.Expires) {
+			continue
+		}
+		v.bans[b.IP] = b
+	}
+}
+
+// Recent returns the mirrored active bans, most recently banned first.
+func (v *View) Recent() []Ban {
+	now := v.now()
+	v.mu.Lock()
+	defer v.mu.Unlock()
+	out := make([]Ban, 0, len(v.bans))
+	for _, b := range v.bans {
+		if now.Before(b.Expires) {
+			out = append(out, b)
+		}
+	}
+	sort.Slice(out, func(i, j int) bool { return out[i].Since.After(out[j].Since) })
+	return out
+}
+
+// RequestUnban records an operator request to lift the ban on ip; the gateway
+// applies it on its next sync (so the console reflects it within the sync
+// interval). An empty ip is ignored.
+func (v *View) RequestUnban(ip string) {
+	if ip == "" {
+		return
+	}
+	v.mu.Lock()
+	defer v.mu.Unlock()
+	v.unban[ip] = struct{}{}
+}
+
+// DrainUnbans returns and clears the IPs operators have marked for unban since the
+// previous drain. It returns nil when there are none.
+func (v *View) DrainUnbans() []string {
+	v.mu.Lock()
+	defer v.mu.Unlock()
+	if len(v.unban) == 0 {
+		return nil
+	}
+	out := make([]string, 0, len(v.unban))
+	for ip := range v.unban {
+		out = append(out, ip)
+	}
+	clear(v.unban)
+	return out
+}

backend/internal/banview/banview_test.go

@@ -0,0 +1,64 @@
+package banview
+
+import (
+	"testing"
+	"time"
+)
+
+func viewAt(clk *time.Time) *View {
+	v := New()
+	v.now = func() time.Time { return *clk }
+	return v
+}
+
+func TestIngestRecentDropsExpired(t *testing.T) {
+	clk := time.Date(2026, 6, 21, 12, 0, 0, 0, time.UTC)
+	v := viewAt(&clk)
+	v.Ingest([]Ban{
+		{IP: "1.1.1.1", Reason: "tripwire", Since: clk, Expires: clk.Add(time.Hour)},
+		{IP: "2.2.2.2", Reason: "rejections", Since: clk.Add(-2 * time.Hour), Expires: clk.Add(-time.Hour)}, // expired
+		{IP: "", Reason: "x", Since: clk, Expires: clk.Add(time.Hour)},                                      // empty IP
+	})
+	got := v.Recent()
+	if len(got) != 1 || got[0].IP != "1.1.1.1" || got[0].Reason != "tripwire" {
+		t.Fatalf("Recent = %+v, want one live ban for 1.1.1.1", got)
+	}
+}
+
+func TestIngestReplaces(t *testing.T) {
+	clk := time.Date(2026, 6, 21, 12, 0, 0, 0, time.UTC)
+	v := viewAt(&clk)
+	v.Ingest([]Ban{{IP: "1.1.1.1", Since: clk, Expires: clk.Add(time.Hour)}})
+	v.Ingest([]Ban{{IP: "2.2.2.2", Since: clk, Expires: clk.Add(time.Hour)}})
+	got := v.Recent()
+	if len(got) != 1 || got[0].IP != "2.2.2.2" {
+		t.Fatalf("Recent = %+v, want only the latest report (2.2.2.2)", got)
+	}
+}
+
+func TestRecentOrdersBySince(t *testing.T) {
+	clk := time.Date(2026, 6, 21, 12, 0, 0, 0, time.UTC)
+	v := viewAt(&clk)
+	v.Ingest([]Ban{
+		{IP: "old", Since: clk.Add(-10 * time.Minute), Expires: clk.Add(time.Hour)},
+		{IP: "new", Since: clk.Add(-1 * time.Minute), Expires: clk.Add(time.Hour)},
+	})
+	got := v.Recent()
+	if len(got) != 2 || got[0].IP != "new" || got[1].IP != "old" {
+		t.Fatalf("Recent order = %+v, want most recent first", got)
+	}
+}
+
+func TestUnbanRoundTrip(t *testing.T) {
+	clk := time.Date(2026, 6, 21, 12, 0, 0, 0, time.UTC)
+	v := viewAt(&clk)
+	v.RequestUnban("3.3.3.3")
+	v.RequestUnban("") // ignored
+	drained := v.DrainUnbans()
+	if len(drained) != 1 || drained[0] != "3.3.3.3" {
+		t.Fatalf("DrainUnbans = %v, want [3.3.3.3]", drained)
+	}
+	if again := v.DrainUnbans(); again != nil {
+		t.Fatalf("second DrainUnbans = %v, want nil (cleared)", again)
+	}
+}

backend/internal/connector/client.go

@@ -1,11 +1,10 @@
-// Package connector is the backend's gRPC client for the Telegram platform
-// connector side-service. The admin console uses it to send operator broadcasts:
-// a direct message to one user, or a post to a game channel. Each broadcast
-// selects the delivering bot by language (an operator choice, since the connector
-// hosts one bot per service language). The connector lives on the trusted internal
-// network, so the connection uses insecure (plaintext) transport credentials
-// (docs/ARCHITECTURE.md §12). It mirrors gateway/internal/connector, narrowed to
-// the two broadcast methods the admin surface needs.
+// Package connector is the backend's gRPC client for operator broadcasts: a direct
+// message to one user, or a post to the game channel. It calls the gateway's
+// bot-link relay (which forwards the send to the remote bot over the reverse mTLS
+// link and reports back whether it was delivered). The relay lives on the trusted
+// internal network, so the connection uses insecure (plaintext) transport
+// credentials (docs/ARCHITECTURE.md §12). It speaks the Telegram service contract,
+// narrowed to the two broadcast methods the admin surface needs.
 package connector
 
 import (
@@ -37,22 +36,21 @@ func New(addr string) (*Client, error) {
 func (c *Client) Close() error { return c.conn.Close() }
 
 // SendToUser sends an operator text message to one user, addressed by their
-// platform external_id, through the bot for the given language. delivered reports
-// whether the connector actually sent it (false when the user has not started that
-// bot).
-func (c *Client) SendToUser(ctx context.Context, externalID, text, language string) (bool, error) {
-	resp, err := c.c.SendToUser(ctx, &telegramv1.SendToUserRequest{ExternalId: externalID, Text: text, Language: language})
+// platform external_id, through the bot. delivered reports whether the connector
+// actually sent it (false when the user has not started the bot).
+func (c *Client) SendToUser(ctx context.Context, externalID, text string) (bool, error) {
+	resp, err := c.c.SendToUser(ctx, &telegramv1.SendToUserRequest{ExternalId: externalID, Text: text})
 	if err != nil {
 		return false, err
 	}
 	return resp.GetDelivered(), nil
 }
 
-// SendToGameChannel posts an operator text message to the game channel of the bot
-// for the given language. delivered reports whether the connector sent it (false
-// when that bot has no channel configured).
-func (c *Client) SendToGameChannel(ctx context.Context, text, language string) (bool, error) {
-	resp, err := c.c.SendToGameChannel(ctx, &telegramv1.SendToGameChannelRequest{Text: text, Language: language})
+// SendToGameChannel posts an operator text message to the bot's game channel.
+// delivered reports whether the connector sent it (false when the bot has no
+// channel configured).
+func (c *Client) SendToGameChannel(ctx context.Context, text string) (bool, error) {
+	resp, err := c.c.SendToGameChannel(ctx, &telegramv1.SendToGameChannelRequest{Text: text})
 	if err != nil {
 		return false, err
 	}

backend/internal/engine/decode.go

@@ -21,7 +21,7 @@ const (
 	// ActionResign abandons the game.
 	ActionResign
 	// ActionTimeout is the auto-resignation a missed turn becomes; recorded by
-	// the game domain in a later stage, never produced by the engine itself.
+	// the game domain, never produced by the engine itself.
 	ActionTimeout
 )
 

backend/internal/engine/engine.go

@@ -10,7 +10,7 @@
 // characters (see decode.go and docs/ARCHITECTURE.md §9.1), so archived games
 // replay independently of any dictionary. Second, the engine owns rules and
 // scoring only: turn scheduling, the 24-hour timeout, persistence and transport
-// belong to the game domain in a later stage.
+// belong to the game domain.
 package engine
 
 import (

backend/internal/engine/registry.go

@@ -31,7 +31,7 @@ type entry struct {
 // Registry holds the dictionaries resident in memory, addressed by variant and
 // dictionary version, and the solvers built over them. Several versions of a
 // variant may be resident at once; a game pins the version it started on. The
-// admin reload flow (a later stage) registers a new version through Load.
+// admin reload flow registers a new version through Load.
 // Registry is safe for concurrent use.
 type Registry struct {
 	mu      sync.RWMutex
@@ -70,11 +70,21 @@ func Open(dir, version string, variants ...Variant) (*Registry, error) {
 // immediate subdirectory of dir: a subdirectory named V contributes, under
 // version V, the variants whose committed DAWG it carries. This is the
 // restart-side of the admin dictionary reload — a version reloaded into dir/<V>/
-// at runtime is resident again after a restart. A subdirectory named like the
-// boot version is skipped (the flat dir already is the boot version). A partially
-// loaded registry is closed before any error is returned.
+// at runtime is resident again after a restart. The flat dir's version is resolved
+// from its .seed_version marker (see resolveSeedVersion): a fresh dir records
+// bootVersion, an already-seeded dir keeps its recorded label and ignores bootVersion,
+// so a bumped build seed never relabels live bytes. A subdirectory named like the
+// resolved seed version is skipped (the flat dir already is it). A partially loaded
+// registry is closed before any error is returned.
 func OpenWithVersions(dir, bootVersion string) (*Registry, error) {
-	r, err := Open(dir, bootVersion)
+	// Resolve the flat dir's version from its seed marker first: on an already-seeded
+	// volume the marker wins and bootVersion is ignored, so a bumped build seed cannot
+	// relabel live bytes (see resolveSeedVersion).
+	seed, err := resolveSeedVersion(dir, bootVersion)
+	if err != nil {
+		return nil, err
+	}
+	r, err := Open(dir, seed)
 	if err != nil {
 		return nil, err
 	}
@@ -84,9 +94,9 @@ func OpenWithVersions(dir, bootVersion string) (*Registry, error) {
 		return nil, fmt.Errorf("engine: scan dictionary dir %s: %w", dir, err)
 	}
 	for _, e := range entries {
-		// Skip non-directories, the boot version (already loaded as the flat dir)
-		// and dot-prefixed directories (the upload staging area, dir/.staging/).
-		if !e.IsDir() || e.Name() == bootVersion || strings.HasPrefix(e.Name(), ".") {
+		// Skip non-directories, the resolved seed version (already loaded as the flat
+		// dir) and dot-prefixed directories (the upload staging area, dir/.staging/).
+		if !e.IsDir() || e.Name() == seed || strings.HasPrefix(e.Name(), ".") {
 			continue
 		}
 		if _, err := r.LoadAvailable(filepath.Join(dir, e.Name()), e.Name()); err != nil {

backend/internal/engine/reload_test.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"os"
 	"path/filepath"
+	"strings"
 	"testing"
 )
 
@@ -112,6 +113,103 @@ func TestOpenWithVersionsSkipsDotDirs(t *testing.T) {
 	}
 }
 
+// TestOpenWithVersionsRecordsSeedMarker verifies the first boot records the seed
+// version in the flat dir's marker, the marker is not mistaken for a version, and a
+// reboot at the same seed version succeeds.
+func TestOpenWithVersionsRecordsSeedMarker(t *testing.T) {
+	dir := t.TempDir()
+	for _, v := range Variants() {
+		copyDawg(t, testDictDir(), dir, v)
+	}
+
+	reg, err := OpenWithVersions(dir, "v1")
+	if err != nil {
+		t.Fatalf("first open: %v", err)
+	}
+	if got := reg.Versions(VariantEnglish); len(got) != 1 || got[0] != "v1" {
+		t.Errorf("versions = %v, want only [v1] (marker not a version)", got)
+	}
+	_ = reg.Close()
+
+	data, err := os.ReadFile(filepath.Join(dir, seedMarkerFile))
+	if err != nil {
+		t.Fatalf("read seed marker: %v", err)
+	}
+	if got := strings.TrimSpace(string(data)); got != "v1" {
+		t.Fatalf("seed marker = %q, want v1", got)
+	}
+
+	reg2, err := OpenWithVersions(dir, "v1")
+	if err != nil {
+		t.Fatalf("reboot at same seed: %v", err)
+	}
+	_ = reg2.Close()
+}
+
+// TestOpenWithVersionsMarkerWinsOverBoot verifies the recorded .seed_version marker
+// is authoritative: once a directory is seeded, a different bootVersion
+// (BACKEND_DICT_VERSION) is ignored — the flat dir keeps its recorded label — so a
+// bumped build seed on a live volume cannot relabel the already-seeded bytes.
+func TestOpenWithVersionsMarkerWinsOverBoot(t *testing.T) {
+	dir := t.TempDir()
+	for _, v := range Variants() {
+		copyDawg(t, testDictDir(), dir, v)
+	}
+
+	reg, err := OpenWithVersions(dir, "v1") // seeds the marker = v1
+	if err != nil {
+		t.Fatalf("seed open: %v", err)
+	}
+	_ = reg.Close()
+
+	// Reboot with a bumped boot version: the marker (v1) wins, no error, v2 ignored.
+	reg2, err := OpenWithVersions(dir, "v2")
+	if err != nil {
+		t.Fatalf("reboot with bumped boot version: %v", err)
+	}
+	defer func() { _ = reg2.Close() }()
+	if got := reg2.Versions(VariantEnglish); len(got) != 1 || got[0] != "v1" {
+		t.Errorf("versions = %v, want [v1] (marker wins, v2 ignored)", got)
+	}
+	if _, err := reg2.Solver(VariantEnglish, "v2"); !errors.Is(err, ErrUnknownVersion) {
+		t.Errorf("v2 must not be resident: got %v", err)
+	}
+	data, _ := os.ReadFile(filepath.Join(dir, seedMarkerFile))
+	if got := strings.TrimSpace(string(data)); got != "v1" {
+		t.Errorf("marker = %q, want v1 (unchanged)", got)
+	}
+}
+
+// TestOpenWithVersionsBumpedBootKeepsSubdir mirrors the live-contour case: a volume
+// seeded as v1 with a v2 subdirectory (uploaded via the console), booted with a bumped
+// build seed bootVersion=v2. The marker (v1) wins for the flat dir, and the v2
+// subdirectory is still loaded — not skipped as "the boot version" — so both versions
+// stay resident. (Skipping it would silently leave only the flat v1 bytes under v2.)
+func TestOpenWithVersionsBumpedBootKeepsSubdir(t *testing.T) {
+	dir := t.TempDir()
+	for _, v := range Variants() {
+		copyDawg(t, testDictDir(), dir, v)
+	}
+	reg0, err := OpenWithVersions(dir, "v1") // seed marker = v1
+	if err != nil {
+		t.Fatalf("seed: %v", err)
+	}
+	_ = reg0.Close()
+	copyDawg(t, testDictDir(), filepath.Join(dir, "v2"), VariantEnglish) // console upload
+
+	reg, err := OpenWithVersions(dir, "v2") // bumped build seed
+	if err != nil {
+		t.Fatalf("boot v2: %v", err)
+	}
+	defer func() { _ = reg.Close() }()
+	if _, err := reg.Solver(VariantEnglish, "v1"); err != nil {
+		t.Errorf("flat v1 must stay resident: %v", err)
+	}
+	if _, err := reg.Solver(VariantEnglish, "v2"); err != nil {
+		t.Errorf("v2 subdir must be resident (not skipped): %v", err)
+	}
+}
+
 // TestReloadRegistersNewVersion verifies Load adds a second version to a variant
 // already resident, moves the latest pointer and keeps the earlier version.
 func TestReloadRegistersNewVersion(t *testing.T) {

backend/internal/engine/seedmarker.go

@@ -0,0 +1,53 @@
+package engine
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+// seedMarkerFile names the file, in the flat dictionary directory, that records the
+// version the directory was first seeded as. It is dot-prefixed so OpenWithVersions'
+// version scan skips it (like the .staging upload area).
+const seedMarkerFile = ".seed_version"
+
+// resolveSeedVersion returns the version label the flat dictionary directory is
+// addressed by, recording it on first use.
+//
+// The contour's dictionary lives on a named volume seeded from the image once and
+// never re-seeded (deploy/docker-compose.yml). The flat DAWGs carry no embedded
+// version, so the version a volume was first seeded as is recorded in a
+// .seed_version marker and is **authoritative** from then on:
+//
+//   - fresh directory (no marker): record bootVersion (the build's
+//     BACKEND_DICT_VERSION) and return it — the seed of a fresh volume;
+//   - already-seeded directory: return the recorded marker and ignore bootVersion.
+//
+// So bumping the build seed on a live volume is a harmless no-op (it only takes
+// effect on a future fresh volume) instead of relabelling the already-seeded bytes —
+// which would void games pinned to the prior label and mis-serve new ones. New games
+// still pin the active version (DB-persisted, set by the admin console), which is the
+// real way a running contour moves to a new release.
+//
+// A directory that cannot be written makes the first record fail; that also breaks
+// the admin console (which writes version subdirectories here), so the error is
+// returned rather than swallowed, matching the package's fail-loud dictionary setup.
+func resolveSeedVersion(dir, bootVersion string) (string, error) {
+	path := filepath.Join(dir, seedMarkerFile)
+	data, err := os.ReadFile(path)
+	if err != nil && !errors.Is(err, os.ErrNotExist) {
+		return "", fmt.Errorf("engine: read dictionary seed marker %s: %w", path, err)
+	}
+	if err == nil {
+		if recorded := strings.TrimSpace(string(data)); recorded != "" {
+			return recorded, nil
+		}
+		// An empty/corrupt marker falls through and is rewritten from bootVersion.
+	}
+	if werr := os.WriteFile(path, []byte(bootVersion+"\n"), 0o644); werr != nil {
+		return "", fmt.Errorf("engine: record dictionary seed marker %s: %w", path, werr)
+	}
+	return bootVersion, nil
+}

backend/internal/engine/setup.go

@@ -0,0 +1,52 @@
+package engine
+
+import "fmt"
+
+// SetupTile is one tile of a variant's full bag, decoded for the first-move draw
+// (docs/ARCHITECTURE.md §6): its concrete letter (or the blank marker), a blank
+// flag, and its draw rank. Lower rank wins the draw — a blank ranks above every
+// letter, and letters rank by alphabet index, so the tile closest to the start of
+// the alphabet ("A") wins. It is dictionary-independent, built from the variant's
+// solver ruleset alone.
+type SetupTile struct {
+	// Letter is the concrete character (the case the solver ruleset emits), or
+	// the blank marker "?" for a blank.
+	Letter string
+	// Blank reports whether the tile is a blank.
+	Blank bool
+	// Rank orders the draw: BlankRank for a blank (best), else the letter's
+	// alphabet index (0 = closest to "A").
+	Rank int
+}
+
+// BlankRank is the first-move draw rank of a blank: below every letter index, so a
+// blank always beats a lettered tile, matching the official rule that a blank
+// supersedes all letters.
+const BlankRank = -1
+
+// SetupBag returns variant's full tile bag — every lettered tile expanded by its
+// count, plus one entry per blank — decoded for the first-move seeding draw. The
+// order is deterministic (alphabet order, blanks last); callers shuffle it with
+// their own entropy. It needs no dictionary, so it is built from the variant's
+// ruleset alone and reports ErrUnknownVariant for an unrecognised variant.
+func SetupBag(v Variant) ([]SetupTile, error) {
+	rs, ok := v.ruleset()
+	if !ok {
+		return nil, fmt.Errorf("%w: %d", ErrUnknownVariant, v)
+	}
+	bag := make([]SetupTile, 0, 128)
+	for i, n := range rs.Counts {
+		ch, err := rs.Alphabet.Character(byte(i))
+		if err != nil {
+			// An offered variant's alphabet never yields a bad index; skip defensively.
+			continue
+		}
+		for range n {
+			bag = append(bag, SetupTile{Letter: ch, Rank: i})
+		}
+	}
+	for range rs.Blanks {
+		bag = append(bag, SetupTile{Letter: blankLetter, Blank: true, Rank: BlankRank})
+	}
+	return bag, nil
+}

backend/internal/engine/setup_test.go

@@ -0,0 +1,47 @@
+package engine
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestSetupBagEnglish(t *testing.T) {
+	bag, err := SetupBag(VariantEnglish)
+	if err != nil {
+		t.Fatalf("SetupBag: %v", err)
+	}
+	// English Scrabble: 98 lettered tiles + 2 blanks = 100.
+	if len(bag) != 100 {
+		t.Fatalf("bag size = %d, want 100", len(bag))
+	}
+	blanks, aCount := 0, 0
+	for _, tl := range bag {
+		switch {
+		case tl.Blank:
+			blanks++
+			if tl.Rank != BlankRank {
+				t.Errorf("blank rank = %d, want %d", tl.Rank, BlankRank)
+			}
+			if tl.Letter != blankLetter {
+				t.Errorf("blank letter = %q, want %q", tl.Letter, blankLetter)
+			}
+		case tl.Letter == "a":
+			aCount++
+			if tl.Rank != 0 {
+				t.Errorf("'a' rank = %d, want 0 (closest to A)", tl.Rank)
+			}
+		}
+	}
+	if blanks != 2 {
+		t.Errorf("blanks = %d, want 2", blanks)
+	}
+	if aCount != 9 {
+		t.Errorf("'a' count = %d, want 9", aCount)
+	}
+}
+
+func TestSetupBagUnknownVariant(t *testing.T) {
+	if _, err := SetupBag(Variant(99)); !errors.Is(err, ErrUnknownVariant) {
+		t.Fatalf("err = %v, want ErrUnknownVariant", err)
+	}
+}

backend/internal/feedback/service.go

@@ -72,7 +72,7 @@ func (svc *Service) SetNotifier(p notify.Publisher) {
 // validates the body (non-empty, within the rune limit) and the optional
 // attachment (size and extension allow-list). senderIP is the gateway-forwarded
 // client IP (validated); channel is the submitting platform.
-func (svc *Service) Submit(ctx context.Context, accountID uuid.UUID, body string, attachment []byte, attachmentName, channel, senderIP string) error {
+func (svc *Service) Submit(ctx context.Context, accountID uuid.UUID, body string, attachment []byte, attachmentName, channel, version, browserTZ, senderIP string) error {
 	acc, err := svc.accounts.GetByID(ctx, accountID)
 	if err != nil {
 		return err
@@ -112,14 +112,10 @@ func (svc *Service) Submit(ctx context.Context, accountID uuid.UUID, body string
 		attachmentName = "" // a name without bytes carries no attachment
 	}
 	ch := normalizeChannel(channel)
-	// Snapshot the languages at submit time (acc is already loaded for the guest check):
-	// the sender's interface language, and the connector bot language when the message
-	// came through an external connector (currently Telegram).
-	var channelLang string
-	if ch == "telegram" {
-		channelLang = acc.ServiceLanguage
-	}
-	_, err = svc.store.Insert(ctx, accountID, body, attachment, attachmentName, ch, acc.PreferredLanguage, channelLang, parseIP(senderIP))
+	// Snapshot the sender's interface language, the client app version and the client's
+	// detected UTC offset at submit time (acc is already loaded for the guest check) so the
+	// operator later sees the state as it was.
+	_, err = svc.store.Insert(ctx, accountID, body, attachment, attachmentName, ch, acc.PreferredLanguage, version, browserTZ, parseIP(senderIP))
 	return err
 }
 

backend/internal/feedback/store.go

@@ -34,11 +34,10 @@ func NewStore(db *sql.DB) *Store {
 
 // Insert stores one feedback message from accountID and returns its id. attachment
 // is the raw file bytes (nil for none); attachmentName, ip and a non-default
-// channel are stored as given. lang (the sender's interface language) and channelLang
-// (the connector bot language, empty for a non-connector channel) are snapshots taken
-// now, so the operator later sees the state at submit time. created_at defaults to
-// now() in the database.
-func (s *Store) Insert(ctx context.Context, accountID uuid.UUID, body string, attachment []byte, attachmentName, channel, lang, channelLang string, ip *string) (uuid.UUID, error) {
+// channel are stored as given. lang (interface language), version (client app build) and
+// browserTZ (the client's detected "±HH:MM" UTC offset) are snapshots taken now, so the operator
+// later sees the state at submit time. created_at defaults to now() in the database.
+func (s *Store) Insert(ctx context.Context, accountID uuid.UUID, body string, attachment []byte, attachmentName, channel, lang, version, browserTZ string, ip *string) (uuid.UUID, error) {
 	id, err := uuid.NewV7()
 	if err != nil {
 		return uuid.Nil, fmt.Errorf("feedback: new message id: %w", err)
@@ -49,9 +48,9 @@ func (s *Store) Insert(ctx context.Context, accountID uuid.UUID, body string, at
 	}
 	if _, err := s.db.ExecContext(ctx,
 		`INSERT INTO backend.feedback_messages
-		   (message_id, account_id, body, attachment, attachment_name, channel, lang, channel_lang, sender_ip)
-		 VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9)`,
-		id, accountID, body, att, nullStr(attachmentName), channel, nullStr(lang), nullStr(channelLang), ip); err != nil {
+		   (message_id, account_id, body, attachment, attachment_name, channel, lang, app_version, browser_tz, sender_ip)
+		 VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10)`,
+		id, accountID, body, att, nullStr(attachmentName), channel, nullStr(lang), nullStr(version), nullStr(browserTZ), ip); err != nil {
 		return uuid.Nil, fmt.Errorf("feedback: insert: %w", err)
 	}
 	return id, nil
@@ -228,10 +227,16 @@ type AdminMessage struct {
 	Source     string
 	Body       string
 	Channel    string
-	// Lang is the sender's interface language and ChannelLang the connector bot language
-	// (en/ru, empty for a non-connector channel) — both snapshotted at submit time.
-	Lang           string
-	ChannelLang    string
+	// Lang is the sender's interface language, snapshotted at submit time.
+	Lang string
+	// Version is the client app build the report was sent from, snapshotted at submit time.
+	Version string
+	// BrowserTZ is the client's detected "±HH:MM" UTC offset at submit time, snapshotted so the
+	// filed time can be shown in the sender's browser-local zone even before they save a profile.
+	BrowserTZ string
+	// TimeZone is the sender account's stored zone ("±HH:MM" offset, IANA name, or ""), for
+	// rendering CreatedAt in the sender's own configured time alongside UTC.
+	TimeZone       string
 	SenderIP       string
 	HasAttachment  bool
 	AttachmentName string
@@ -346,7 +351,7 @@ func (s *Store) AdminGet(ctx context.Context, id uuid.UUID) (AdminMessage, error
 	var m AdminMessage
 	var repliedAt sql.NullTime
 	q := `SELECT m.message_id, m.account_id, a.display_name, ` + feedbackSource + ` AS source, m.body, m.channel,
-		COALESCE(m.lang, ''), COALESCE(m.channel_lang, ''),
+		COALESCE(m.lang, ''), COALESCE(m.app_version, ''), COALESCE(m.browser_tz, ''), a.time_zone,
 		COALESCE(m.sender_ip, ''), (m.attachment IS NOT NULL), COALESCE(m.attachment_name, ''),
 		(m.read_at IS NOT NULL), (m.archived_at IS NOT NULL), (m.reply_body IS NOT NULL),
 		COALESCE(m.reply_body, ''), m.replied_at, m.created_at
@@ -355,7 +360,7 @@ func (s *Store) AdminGet(ctx context.Context, id uuid.UUID) (AdminMessage, error
 	WHERE m.message_id = $1`
 	err := s.db.QueryRowContext(ctx, q, id).Scan(
 		&m.ID, &m.AccountID, &m.SenderName, &m.Source, &m.Body, &m.Channel,
-		&m.Lang, &m.ChannelLang,
+		&m.Lang, &m.Version, &m.BrowserTZ, &m.TimeZone,
 		&m.SenderIP, &m.HasAttachment, &m.AttachmentName,
 		&m.Read, &m.Archived, &m.Replied, &m.ReplyBody, &repliedAt, &m.CreatedAt)
 	if errors.Is(err, sql.ErrNoRows) {

backend/internal/game/cache.go

@@ -63,6 +63,7 @@ type gameCache struct {
 
 type cachedGame struct {
 	game       *engine.Game
+	seats      []Seat
 	variant    string
 	lastAccess time.Time
 }
@@ -71,24 +72,27 @@ func newGameCache(ttl time.Duration, now func() time.Time) *gameCache {
 	return &gameCache{entries: make(map[uuid.UUID]*cachedGame), ttl: ttl, now: now}
 }
 
-// get returns the live game for id and refreshes its idle timer, or (nil, false).
-func (c *gameCache) get(id uuid.UUID) (*engine.Game, bool) {
+// get returns the live game and its immutable seat list for id and refreshes its idle
+// timer, or (nil, nil, false). The seats let a read check membership (and label seats)
+// without re-loading the game from the store, since seats never change after a game starts.
+func (c *gameCache) get(id uuid.UUID) (*engine.Game, []Seat, bool) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
 	e, ok := c.entries[id]
 	if !ok {
-		return nil, false
+		return nil, nil, false
 	}
 	e.lastAccess = c.now()
-	return e.game, true
+	return e.game, e.seats, true
 }
 
-// put stores g as the live game for id. variant labels the entry so the active-
-// games gauge can report counts by variant without inspecting engine internals.
-func (c *gameCache) put(id uuid.UUID, g *engine.Game, variant string) {
+// put stores g as the live game for id together with its seat list. variant labels the
+// entry so the active-games gauge can report counts by variant without inspecting engine
+// internals; seats are the game's immutable seat standings for the membership fast path.
+func (c *gameCache) put(id uuid.UUID, g *engine.Game, variant string, seats []Seat) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
-	c.entries[id] = &cachedGame{game: g, variant: variant, lastAccess: c.now()}
+	c.entries[id] = &cachedGame{game: g, seats: seats, variant: variant, lastAccess: c.now()}
 }
 
 // remove drops id from the cache (used on a finished game and after a failed

backend/internal/game/doc.go

@@ -16,5 +16,5 @@
 // word-check tool with complaint capture, per-player game state, history and GCG
 // export, and the per-game turn-timeout sweeper that auto-resigns an overdue
 // player (honouring their daily away window). The HTTP surface that fronts these
-// operations is added with the gateway in a later stage.
+// operations is exposed to the gateway.
 package game

backend/internal/game/emit_test.go

@@ -68,10 +68,6 @@ func TestEmitMoveNotifiesActor(t *testing.T) {
 	if got := string(yt.ScoreLine()); got != "13:19" { // seat 1 (recipient) first, then seat 0
 		t.Errorf("your_turn score_line = %q, want 13:19", got)
 	}
-	// Routed out-of-app by the game's language (the default Variant is English).
-	if yourTurn.Language != "en" {
-		t.Errorf("your_turn language = %q, want en", yourTurn.Language)
-	}
 }
 
 // TestEmitMoveAnnouncesGameOver checks the closing move sends a game_over push to every seat,
@@ -106,7 +102,4 @@ func TestEmitMoveAnnouncesGameOver(t *testing.T) {
 	if string(l.Result()) != "lost" || string(l.ScoreLine()) != "95:120" {
 		t.Errorf("loser game_over = %q / %q, want lost / 95:120", l.Result(), l.ScoreLine())
 	}
-	if over[winner].Language != "en" || over[loser].Language != "en" {
-		t.Errorf("game_over languages = %q/%q, want en/en", over[winner].Language, over[loser].Language)
-	}
 }

backend/internal/game/eventwire.go

@@ -51,6 +51,7 @@ func gameSummary(g Game, names []string) notify.GameSummary {
 		ToMove:               g.ToMove,
 		TurnTimeoutSecs:      int(g.TurnTimeout.Seconds()),
 		MultipleWordsPerTurn: g.MultipleWordsPerTurn,
+		VsAI:                 g.VsAI,
 		MoveCount:            g.MoveCount,
 		EndReason:            g.EndReason,
 		Seats:                seats,
@@ -73,6 +74,7 @@ func playerState(v StateView, names []string, includeAlphabet bool) (notify.Play
 		Rack:           rack,
 		BagLen:         v.BagLen,
 		HintsRemaining: v.HintsRemaining,
+		WalletBalance:  v.WalletBalance,
 	}
 	if includeAlphabet {
 		tab, err := engine.AlphabetTable(v.Game.Variant)

backend/internal/game/helpers_test.go

@@ -94,8 +94,8 @@ func TestGameCacheEviction(t *testing.T) {
 	cur := time.Unix(1_700_000_000, 0)
 	cache := newGameCache(time.Hour, func() time.Time { return cur })
 	id := uuid.New()
-	cache.put(id, nil, "scrabble_en")
-	if _, ok := cache.get(id); !ok {
+	cache.put(id, nil, "scrabble_en", nil)
+	if _, _, ok := cache.get(id); !ok {
 		t.Fatal("game must be resident after put")
 	}
 	cur = cur.Add(30 * time.Minute)
@@ -104,7 +104,7 @@ func TestGameCacheEviction(t *testing.T) {
 	if n := cache.sweep(); n != 1 {
 		t.Errorf("sweep evicted %d, want 1", n)
 	}
-	if _, ok := cache.get(id); ok {
+	if _, _, ok := cache.get(id); ok {
 		t.Error("game must be evicted after idle TTL")
 	}
 	if cache.size() != 0 {

backend/internal/game/metrics.go

@@ -101,15 +101,22 @@ func phaseOf(moveCount int) string {
 	}
 }
 
-// recordStarted counts one started game of variant.
-func (m *gameMetrics) recordStarted(ctx context.Context, v engine.Variant) {
-	m.started.Add(ctx, 1, variantAttr(v))
+// recordStarted counts one started game of variant, split by whether it is an
+// honest-AI game (the vs_ai attribute), so AI and human games chart separately.
+func (m *gameMetrics) recordStarted(ctx context.Context, v engine.Variant, vsAI bool) {
+	m.started.Add(ctx, 1, gameKindAttr(v, vsAI))
 }
 
 // recordAbandoned counts one seat dropped by the turn-timeout sweeper in a game of
-// variant.
-func (m *gameMetrics) recordAbandoned(ctx context.Context, v engine.Variant) {
-	m.abandoned.Add(ctx, 1, variantAttr(v))
+// variant, split by the vs_ai attribute (an AI game's abandon is the 7-day rule).
+func (m *gameMetrics) recordAbandoned(ctx context.Context, v engine.Variant, vsAI bool) {
+	m.abandoned.Add(ctx, 1, gameKindAttr(v, vsAI))
+}
+
+// gameKindAttr is the (variant, vs_ai) attribute set shared by the started and
+// abandoned counters so AI and human games are split on the same labels.
+func gameKindAttr(v engine.Variant, vsAI bool) metric.MeasurementOption {
+	return metric.WithAttributes(attribute.String("variant", v.String()), attribute.Bool("vs_ai", vsAI))
 }
 
 // variantAttr is the shared "variant" attribute option, usable for both Record and

backend/internal/game/metrics_test.go

@@ -20,10 +20,12 @@ func TestGameMetrics(t *testing.T) {
 	meter := sdkmetric.NewMeterProvider(sdkmetric.WithReader(reader)).Meter("test")
 	m := newGameMetrics(meter)
 
-	m.recordStarted(ctx, engine.VariantEnglish)
-	m.recordStarted(ctx, engine.VariantEnglish)
-	m.recordStarted(ctx, engine.VariantRussianScrabble)
-	m.recordAbandoned(ctx, engine.VariantErudit)
+	m.recordStarted(ctx, engine.VariantEnglish, false)
+	m.recordStarted(ctx, engine.VariantEnglish, false)
+	m.recordStarted(ctx, engine.VariantRussianScrabble, false)
+	m.recordStarted(ctx, engine.VariantEnglish, true) // an honest-AI game
+	m.recordAbandoned(ctx, engine.VariantErudit, false)
+	m.recordAbandoned(ctx, engine.VariantEnglish, true) // an AI game abandoned (the 7-day rule)
 	m.recordReplay(ctx, engine.VariantEnglish, time.Now().Add(-time.Millisecond))
 	m.recordValidate(ctx, engine.VariantRussianScrabble, time.Now().Add(-time.Millisecond))
 	m.recordMoveDuration(ctx, engine.VariantEnglish, 3, 5*time.Second)
@@ -35,11 +37,15 @@ func TestGameMetrics(t *testing.T) {
 	}
 
 	started := counterByAttr(t, rm, "games_started_total", "variant")
-	if started["scrabble_en"] != 2 || started["scrabble_ru"] != 1 {
-		t.Errorf("games_started_total = %v, want scrabble_en:2 scrabble_ru:1", started)
+	if started["scrabble_en"] != 3 || started["scrabble_ru"] != 1 {
+		t.Errorf("games_started_total = %v, want scrabble_en:3 scrabble_ru:1", started)
 	}
-	if abandoned := counterByAttr(t, rm, "games_abandoned_total", "variant"); abandoned["erudit_ru"] != 1 {
-		t.Errorf("games_abandoned_total = %v, want erudit_ru:1", abandoned)
+	// The vs_ai attribute splits AI from human games for the per-kind Grafana panels.
+	if byKind := counterByAttr(t, rm, "games_started_total", "vs_ai"); byKind["false"] != 3 || byKind["true"] != 1 {
+		t.Errorf("games_started_total by vs_ai = %v, want false:3 true:1", byKind)
+	}
+	if abandoned := counterByAttr(t, rm, "games_abandoned_total", "vs_ai"); abandoned["false"] != 1 || abandoned["true"] != 1 {
+		t.Errorf("games_abandoned_total by vs_ai = %v, want false:1 true:1", abandoned)
 	}
 	if c := histogramCount(t, rm, "game_replay_duration"); c != 1 {
 		t.Errorf("game_replay_duration observations = %d, want 1", c)
@@ -78,7 +84,7 @@ func counterByAttr(t *testing.T, rm metricdata.ResourceMetrics, name, attr strin
 			}
 			for _, dp := range sum.DataPoints {
 				v, _ := dp.Attributes.Value(attribute.Key(attr))
-				out[v.AsString()] += dp.Value
+				out[v.Emit()] += dp.Value // Emit renders any attribute type (string or bool) to a key
 			}
 		}
 	}

backend/internal/game/replay_timeline.go

@@ -0,0 +1,144 @@
+package game
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/engine"
+)
+
+// ReplayStep is one step of an admin game replay: the move that produced it (nil for the
+// initial dealt state, step 0) and the resulting position — every seat's rack, the running
+// scores, whose turn it is and the bag remainder. Step k's board is the union of every
+// play's placements through step k, which the renderer accumulates onto an empty grid
+// (docs/ARCHITECTURE.md §9.1 visual replay).
+type ReplayStep struct {
+	// Move is the journalled move that produced this state, or nil for the initial deal.
+	Move *HistoryMove
+	// Drawn lists the tiles the mover drew from the bag after this move ("?" for a blank);
+	// empty for the initial deal, a pass or a resignation.
+	Drawn []string
+	// Racks holds every seat's rack at this step, indexed by seat ("?" for a blank).
+	Racks [][]string
+	// Scores holds every seat's running score, indexed by seat.
+	Scores []int
+	// ToMove is the seat to move at this step.
+	ToMove int
+	// BagLen is the number of tiles left in the bag at this step.
+	BagLen int
+}
+
+// ReplayTimelineView is the admin replay of a game: the persisted game plus the ordered
+// replay steps (the initial deal followed by one step per journalled move).
+type ReplayTimelineView struct {
+	Game  Game
+	Steps []ReplayStep
+}
+
+// ReplayTimeline rebuilds a game from its pinned seed and journal and returns the ordered
+// replay steps for the admin console: the initial deal (step 0) then one step per
+// journalled move, each carrying the resulting racks, scores, turn cursor, bag size and the
+// tiles the mover drew. The deterministic bag makes the reconstruction exact. It needs no
+// dictionary beyond the engine the seed deals, and — like the live replay — stops early if a
+// committed move became illegal under tightened rules rather than failing.
+func (svc *Service) ReplayTimeline(ctx context.Context, gameID uuid.UUID) (ReplayTimelineView, error) {
+	pre, err := svc.store.GetGame(ctx, gameID)
+	if err != nil {
+		return ReplayTimelineView{}, err
+	}
+	seed, err := svc.store.GameSeed(ctx, gameID)
+	if err != nil {
+		return ReplayTimelineView{}, err
+	}
+	g, err := engine.New(svc.registry, engine.Options{
+		Variant:              pre.Variant,
+		Version:              pre.DictVersion,
+		Players:              pre.Players,
+		Seed:                 seed,
+		DropoutTiles:         pre.DropoutTiles,
+		MultipleWordsPerTurn: pre.MultipleWordsPerTurn,
+	})
+	if err != nil {
+		return ReplayTimelineView{}, err
+	}
+	moves, err := svc.store.GetJournal(ctx, gameID)
+	if err != nil {
+		return ReplayTimelineView{}, err
+	}
+	steps := make([]ReplayStep, 0, len(moves)+1)
+	steps = append(steps, snapshotStep(g, nil, nil))
+	for i := range moves {
+		mv := moves[i]
+		before := g.Hand(mv.Seat)
+		if err := replayMove(g, mv); err != nil {
+			if errors.Is(err, engine.ErrIllegalPlay) {
+				g.Abort()
+				break
+			}
+			return ReplayTimelineView{}, fmt.Errorf("game: replay-timeline %s move %d: %w", gameID, mv.Seq, err)
+		}
+		moveCopy := mv
+		steps = append(steps, snapshotStep(g, &moveCopy, drawnTiles(before, g.Hand(mv.Seat), usedTiles(mv))))
+	}
+	return ReplayTimelineView{Game: pre, Steps: steps}, nil
+}
+
+// snapshotStep captures the position after applying move (nil for the initial deal): every
+// seat's rack and score, the turn cursor and the bag size, with the supplied drawn tiles.
+func snapshotStep(g *engine.Game, move *HistoryMove, drawn []string) ReplayStep {
+	n := g.Players()
+	racks := make([][]string, n)
+	scores := make([]int, n)
+	for i := 0; i < n; i++ {
+		racks[i] = g.Hand(i)
+		scores[i] = g.Score(i)
+	}
+	return ReplayStep{Move: move, Drawn: drawn, Racks: racks, Scores: scores, ToMove: g.ToMove(), BagLen: g.BagLen()}
+}
+
+// usedTiles returns the rack tiles a move consumed ("?" for a blank): the placed tiles of a
+// play or the swapped tiles of an exchange; a pass or resignation consumes none.
+func usedTiles(mv HistoryMove) []string {
+	switch mv.Action {
+	case "play":
+		used := make([]string, len(mv.Tiles))
+		for i, t := range mv.Tiles {
+			if t.Blank {
+				used[i] = "?" // a placed blank leaves the rack as the blank marker
+			} else {
+				used[i] = t.Letter
+			}
+		}
+		return used
+	case "exchange":
+		return mv.Exchanged
+	}
+	return nil
+}
+
+// drawnTiles returns the tiles the mover drew from the bag: the post-move rack (after) minus
+// the tiles kept (before minus used). It compares the racks as multisets, so duplicate
+// letters are counted correctly.
+func drawnTiles(before, after, used []string) []string {
+	kept := make(map[string]int, len(before))
+	for _, t := range before {
+		kept[t]++
+	}
+	for _, t := range used {
+		if kept[t] > 0 {
+			kept[t]--
+		}
+	}
+	var drawn []string
+	for _, t := range after {
+		if kept[t] > 0 {
+			kept[t]--
+			continue
+		}
+		drawn = append(drawn, t)
+	}
+	return drawn
+}

backend/internal/game/replay_timeline_test.go

@@ -0,0 +1,50 @@
+package game
+
+import (
+	"reflect"
+	"testing"
+
+	"scrabble/backend/internal/engine"
+)
+
+func TestUsedTiles(t *testing.T) {
+	tests := []struct {
+		name string
+		mv   HistoryMove
+		want []string
+	}{
+		{"pass", HistoryMove{Action: "pass"}, nil},
+		{"resign", HistoryMove{Action: "resign"}, nil},
+		{"play with blank", HistoryMove{Action: "play", Tiles: []engine.TileRecord{{Letter: "a"}, {Letter: "b", Blank: true}}}, []string{"a", "?"}},
+		{"exchange", HistoryMove{Action: "exchange", Exchanged: []string{"a", "?"}}, []string{"a", "?"}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := usedTiles(tt.mv); !reflect.DeepEqual(got, tt.want) {
+				t.Fatalf("usedTiles = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestDrawnTiles(t *testing.T) {
+	tests := []struct {
+		name         string
+		before, used []string
+		after        []string
+		want         []string
+	}{
+		{"play refill", []string{"a", "b", "c", "d"}, []string{"a", "b"}, []string{"c", "d", "e", "f"}, []string{"e", "f"}},
+		{"blank played", []string{"?", "a"}, []string{"?"}, []string{"a", "x"}, []string{"x"}},
+		{"pass keeps rack", []string{"a", "b"}, nil, []string{"a", "b"}, nil},
+		{"duplicate letters", []string{"e", "e", "e"}, []string{"e"}, []string{"e", "e", "q"}, []string{"q"}},
+		{"empty bag no refill", []string{"a", "b"}, []string{"a"}, []string{"b"}, nil},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := drawnTiles(tt.before, tt.after, tt.used); !reflect.DeepEqual(got, tt.want) {
+				t.Fatalf("drawnTiles = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}

backend/internal/game/seating.go

@@ -0,0 +1,156 @@
+package game
+
+import (
+	"crypto/rand"
+	"fmt"
+	"math/big"
+
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/engine"
+)
+
+// maxSeedingRounds caps the first-move draw's tie re-draws. With a real bag a tie
+// breaks with positive probability each round, so this is reached only by a
+// degenerate (e.g. test) entropy source that ties forever; the cap turns that into
+// an error instead of an infinite loop.
+const maxSeedingRounds = 1000
+
+// SetupDraw is one recorded tile draw of the first-move seeding — one row of
+// game_setup_draws (docs/ARCHITECTURE.md §6, §9): the round, the draw order within
+// it, the seated account that drew, and the decoded tile with its rank. It is
+// dictionary-independent: the letter, the blank flag and the numeric rank describe
+// the draw without any alphabet table.
+type SetupDraw struct {
+	Round   int
+	PickNo  int
+	Account uuid.UUID
+	Letter  string
+	Blank   bool
+	Rank    int
+}
+
+// seedingResult is the outcome of the first-move seeding: the winning account, the
+// seated accounts rotated so the winner leads (seat 0), and the full draw log to
+// persist.
+type seedingResult struct {
+	winner uuid.UUID
+	order  []uuid.UUID
+	draws  []SetupDraw
+}
+
+// drawIntn returns a uniformly random integer in [0, n) for n > 0. It is the
+// entropy seam of the first-move seeding: production uses crypto/rand (cryptoIntn),
+// so every draw is honestly random with no single seed; tests inject a
+// deterministic source.
+type drawIntn func(n int) (int, error)
+
+// cryptoIntn draws a uniform integer in [0, n) from crypto/rand — the honest,
+// seedless entropy the first-move draw requires.
+func cryptoIntn(n int) (int, error) {
+	v, err := rand.Int(rand.Reader, big.NewInt(int64(n)))
+	if err != nil {
+		return 0, fmt.Errorf("game: first-move draw entropy: %w", err)
+	}
+	return int(v.Int64()), nil
+}
+
+// seedFirstMove runs the official first-move draw over accounts for variant v,
+// drawing tiles with the entropy source intn. Each round every contender draws one
+// tile (without replacement) from a fresh full bag; the tile closest to "A" wins, a
+// blank beating every letter; contenders tied for the best tile re-draw in the next
+// round until a single leader remains. It returns the leader, the rotation that
+// seats the leader first (preserving the others' seating order), and every draw for
+// the record. It performs no I/O beyond calling intn.
+func seedFirstMove(v engine.Variant, accounts []uuid.UUID, intn drawIntn) (seedingResult, error) {
+	if len(accounts) < 2 {
+		return seedingResult{}, fmt.Errorf("game: first-move seeding needs at least 2 accounts, got %d", len(accounts))
+	}
+	full, err := engine.SetupBag(v)
+	if err != nil {
+		return seedingResult{}, err
+	}
+	contenders := append([]uuid.UUID(nil), accounts...)
+	var draws []SetupDraw
+	for round := 1; ; round++ {
+		if round > maxSeedingRounds {
+			return seedingResult{}, fmt.Errorf("game: first-move seeding unresolved after %d rounds", maxSeedingRounds)
+		}
+		bag := append([]engine.SetupTile(nil), full...)
+		picks := make([]engine.SetupTile, len(contenders))
+		for i, acc := range contenders {
+			tile, rest, err := drawSetupTile(bag, intn)
+			if err != nil {
+				return seedingResult{}, err
+			}
+			bag = rest
+			picks[i] = tile
+			draws = append(draws, SetupDraw{
+				Round: round, PickNo: i, Account: acc,
+				Letter: tile.Letter, Blank: tile.Blank, Rank: tile.Rank,
+			})
+		}
+		winners := bestContenders(contenders, picks)
+		if len(winners) == 1 {
+			return seedingResult{winner: winners[0], order: rotateToFirst(accounts, winners[0]), draws: draws}, nil
+		}
+		contenders = winners
+	}
+}
+
+// drawSetupTile removes one uniformly random tile from bag using the entropy source
+// intn and returns it with the shrunk bag (a fresh slice, leaving bag untouched).
+// It is the per-tile draw primitive — the seam a future manual "player N draws a
+// tile" tournament API will drive, one call per external request.
+func drawSetupTile(bag []engine.SetupTile, intn drawIntn) (engine.SetupTile, []engine.SetupTile, error) {
+	if len(bag) == 0 {
+		return engine.SetupTile{}, nil, fmt.Errorf("game: first-move draw from an empty bag")
+	}
+	i, err := intn(len(bag))
+	if err != nil {
+		return engine.SetupTile{}, nil, err
+	}
+	if i < 0 || i >= len(bag) {
+		return engine.SetupTile{}, nil, fmt.Errorf("game: first-move draw index %d out of range %d", i, len(bag))
+	}
+	tile := bag[i]
+	rest := make([]engine.SetupTile, 0, len(bag)-1)
+	rest = append(rest, bag[:i]...)
+	rest = append(rest, bag[i+1:]...)
+	return tile, rest, nil
+}
+
+// bestContenders returns the contenders whose drawn tile has the lowest (best)
+// rank — the sole winner if one, else the tied set that re-draws. picks is aligned
+// with contenders by index.
+func bestContenders(contenders []uuid.UUID, picks []engine.SetupTile) []uuid.UUID {
+	best := picks[0].Rank
+	for _, p := range picks[1:] {
+		if p.Rank < best {
+			best = p.Rank
+		}
+	}
+	var winners []uuid.UUID
+	for i, p := range picks {
+		if p.Rank == best {
+			winners = append(winners, contenders[i])
+		}
+	}
+	return winners
+}
+
+// rotateToFirst returns accounts rotated cyclically so winner sits first (seat 0),
+// preserving the seating order of the rest (docs/ARCHITECTURE.md §6). winner must be
+// present in accounts.
+func rotateToFirst(accounts []uuid.UUID, winner uuid.UUID) []uuid.UUID {
+	i := 0
+	for ; i < len(accounts); i++ {
+		if accounts[i] == winner {
+			break
+		}
+	}
+	out := make([]uuid.UUID, 0, len(accounts))
+	out = append(out, accounts[i:]...)
+	out = append(out, accounts[:i]...)
+	return out
+}

backend/internal/game/seating_test.go

@@ -0,0 +1,130 @@
+package game
+
+import (
+	"testing"
+
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/engine"
+)
+
+// scriptIntn returns a drawIntn that yields the scripted indices in order, failing
+// the test if the script is exhausted or an index is out of range. It lets a test
+// drive the first-move draw deterministically (English SetupBag order: 9 'a' at
+// 0..8, then 'b' …, blanks last).
+func scriptIntn(t *testing.T, seq ...int) drawIntn {
+	t.Helper()
+	i := 0
+	return func(n int) (int, error) {
+		if i >= len(seq) {
+			t.Fatalf("intn script exhausted (asked for [0,%d))", n)
+		}
+		v := seq[i]
+		i++
+		if v < 0 || v >= n {
+			t.Fatalf("intn script value %d out of range [0,%d)", v, n)
+		}
+		return v, nil
+	}
+}
+
+func TestSeedFirstMoveDirectWinner(t *testing.T) {
+	a, b := uuid.New(), uuid.New()
+	// a draws bag[0]='a' (rank 0); b draws bag[8]='b' (rank 1) → a wins, no tie.
+	res, err := seedFirstMove(engine.VariantEnglish, []uuid.UUID{a, b}, scriptIntn(t, 0, 8))
+	if err != nil {
+		t.Fatalf("seedFirstMove: %v", err)
+	}
+	if res.winner != a {
+		t.Fatalf("winner = %v, want %v", res.winner, a)
+	}
+	if got := res.order; len(got) != 2 || got[0] != a || got[1] != b {
+		t.Fatalf("order = %v, want [a b]", got)
+	}
+	if len(res.draws) != 2 {
+		t.Fatalf("draws = %d, want 2", len(res.draws))
+	}
+}
+
+func TestSeedFirstMoveBlankSupersedes(t *testing.T) {
+	a, b := uuid.New(), uuid.New()
+	// a draws 'a' (rank 0); after the draw the two blanks sit at 97,98 — b draws
+	// bag[97], a blank, which beats every letter.
+	res, err := seedFirstMove(engine.VariantEnglish, []uuid.UUID{a, b}, scriptIntn(t, 0, 97))
+	if err != nil {
+		t.Fatalf("seedFirstMove: %v", err)
+	}
+	if res.winner != b {
+		t.Fatalf("winner = %v, want %v (blank supersedes)", res.winner, b)
+	}
+	last := res.draws[len(res.draws)-1]
+	if !last.Blank || last.Rank != engine.BlankRank || last.Letter != "?" {
+		t.Fatalf("winning draw = %+v, want a blank (rank %d, '?')", last, engine.BlankRank)
+	}
+}
+
+func TestSeedFirstMoveTieRedraw(t *testing.T) {
+	a, b, c := uuid.New(), uuid.New(), uuid.New()
+	// Round 1: a→bag[0]='a'(0), b→bag[0]='a'(0), c→bag[7]='b'(1) → a,b tie best.
+	// Round 2 (a,b only): a→bag[0]='a'(0), b→bag[8]='b'(1) → a wins.
+	res, err := seedFirstMove(engine.VariantEnglish, []uuid.UUID{a, b, c}, scriptIntn(t, 0, 0, 7, 0, 8))
+	if err != nil {
+		t.Fatalf("seedFirstMove: %v", err)
+	}
+	if res.winner != a {
+		t.Fatalf("winner = %v, want %v", res.winner, a)
+	}
+	if len(res.draws) != 5 {
+		t.Fatalf("draws = %d, want 5 (3 in round 1, 2 in round 2)", len(res.draws))
+	}
+	if res.draws[2].Round != 1 || res.draws[3].Round != 2 {
+		t.Fatalf("round boundaries wrong: %+v", res.draws)
+	}
+	// The full table keeps every account's seating order, winner first.
+	if got := res.order; got[0] != a || got[1] != b || got[2] != c {
+		t.Fatalf("order = %v, want [a b c]", got)
+	}
+}
+
+func TestSeedFirstMoveTooFewAccounts(t *testing.T) {
+	if _, err := seedFirstMove(engine.VariantEnglish, []uuid.UUID{uuid.New()}, scriptIntn(t)); err == nil {
+		t.Fatal("want error for a single account")
+	}
+}
+
+func TestSeedFirstMovePerpetualTieCapped(t *testing.T) {
+	a, b := uuid.New(), uuid.New()
+	// Always drawing bag[0] gives both players an 'a' every round — a tie that never
+	// resolves; the round cap must turn it into an error, not an infinite loop.
+	alwaysZero := drawIntn(func(int) (int, error) { return 0, nil })
+	if _, err := seedFirstMove(engine.VariantEnglish, []uuid.UUID{a, b}, alwaysZero); err == nil {
+		t.Fatal("want error when ties never resolve")
+	}
+}
+
+func TestRotateToFirst(t *testing.T) {
+	a, b, c, d := uuid.New(), uuid.New(), uuid.New(), uuid.New()
+	tests := []struct {
+		name     string
+		accounts []uuid.UUID
+		winner   uuid.UUID
+		want     []uuid.UUID
+	}{
+		{"two winner second", []uuid.UUID{a, b}, b, []uuid.UUID{b, a}},
+		{"three winner first", []uuid.UUID{a, b, c}, a, []uuid.UUID{a, b, c}},
+		{"four winner third", []uuid.UUID{a, b, c, d}, c, []uuid.UUID{c, d, a, b}},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := rotateToFirst(tt.accounts, tt.winner)
+			if len(got) != len(tt.want) {
+				t.Fatalf("len = %d, want %d", len(got), len(tt.want))
+			}
+			for i := range got {
+				if got[i] != tt.want[i] {
+					t.Fatalf("rotate = %v, want %v", got, tt.want)
+				}
+			}
+		})
+	}
+}

backend/internal/game/seatname_test.go

@@ -0,0 +1,40 @@
+package game
+
+import (
+	"context"
+	"testing"
+
+	"github.com/google/uuid"
+)
+
+// TestSeatNamesUsesSnapshot checks seatNames returns each seat's stored display-name
+// snapshot directly, without consulting the account store (svc.accounts is nil here, so
+// any lookup would be skipped or panic).
+func TestSeatNamesUsesSnapshot(t *testing.T) {
+	svc := &Service{}
+	g := Game{
+		Players: 2,
+		Seats: []Seat{
+			{Seat: 0, AccountID: uuid.New(), DisplayName: "Аня2007"},
+			{Seat: 1, AccountID: uuid.New(), DisplayName: "DarkWolf"},
+		},
+	}
+	got := svc.seatNames(context.Background(), g)
+	want := []string{"Аня2007", "DarkWolf"}
+	if len(got) != len(want) || got[0] != want[0] || got[1] != want[1] {
+		t.Fatalf("seatNames = %v, want %v", got, want)
+	}
+}
+
+// TestSeatDisplayNameFallbackEmpty checks the resolver yields "" — rather than panicking
+// — for a seat with no snapshot when no account store is available (the empty open seat
+// and pre-snapshot legacy-row paths).
+func TestSeatDisplayNameFallbackEmpty(t *testing.T) {
+	svc := &Service{}
+	if got := svc.seatDisplayName(context.Background(), Seat{Seat: 0, AccountID: uuid.New()}); got != "" {
+		t.Errorf("seatDisplayName with no snapshot and no store = %q, want empty", got)
+	}
+	if got := svc.seatDisplayName(context.Background(), Seat{Seat: 1, AccountID: uuid.Nil}); got != "" {
+		t.Errorf("empty-seat name = %q, want empty", got)
+	}
+}

backend/internal/game/service.go

@@ -38,9 +38,24 @@ type Service struct {
 	version string
 	clock   func() time.Time
 	rng     func() int64
-	pub     notify.Publisher
-	metrics *gameMetrics
-	log     *zap.Logger
+	// firstMoveEntropy returns the entropy source for one game's first-move draw
+	// (docs/ARCHITECTURE.md §6). The default is crypto/rand — an honest, seedless draw;
+	// tests override it via SetFirstMoveEntropy for a deterministic turn order. It is a
+	// factory so a stateful test source restarts cleanly per game.
+	firstMoveEntropy func() drawIntn
+	pub              notify.Publisher
+	// aiTrigger, when set, is called after an honest-AI game is created or advanced and
+	// is still on a robot's potential turn, so the robot replies at once instead of
+	// waiting for the next driver scan. It is fire-and-forget (the robot package wires
+	// its asynchronous TriggerMove); nil disables the fast path (the scan still covers
+	// these games). Kept as a func so the game package never imports the robot package.
+	aiTrigger func(gameID uuid.UUID)
+	// clearNudges, when set, marks the actor's pending nudges in a game read once they
+	// have committed a move (a nudge answered by moving stops counting as unread). It is
+	// best-effort and kept as a func so the game package never imports the social package.
+	clearNudges func(ctx context.Context, gameID, accountID uuid.UUID) error
+	metrics     *gameMetrics
+	log         *zap.Logger
 }
 
 // NewService constructs a Service. store and accounts wrap the same pool;
@@ -49,17 +64,18 @@ type Service struct {
 func NewService(store *Store, accounts *account.Store, registry *engine.Registry, cfg Config, log *zap.Logger) *Service {
 	clock := func() time.Time { return time.Now().UTC() }
 	return &Service{
-		store:    store,
-		accounts: accounts,
-		registry: registry,
-		cache:    newGameCache(cfg.CacheTTL, clock),
-		locks:    newKeyedMutex(),
-		version:  cfg.DictVersion,
-		clock:    clock,
-		rng:      randomSeed,
-		pub:      notify.Nop{},
-		metrics:  defaultGameMetrics(),
-		log:      log,
+		store:            store,
+		accounts:         accounts,
+		registry:         registry,
+		cache:            newGameCache(cfg.CacheTTL, clock),
+		locks:            newKeyedMutex(),
+		version:          cfg.DictVersion,
+		clock:            clock,
+		rng:              randomSeed,
+		firstMoveEntropy: func() drawIntn { return cryptoIntn },
+		pub:              notify.Nop{},
+		metrics:          defaultGameMetrics(),
+		log:              log,
 	}
 }
 
@@ -75,6 +91,43 @@ func (svc *Service) SetNotifier(p notify.Publisher) {
 	}
 }
 
+// SetAITrigger installs the honest-AI fast-move hook called when a vs_ai game is
+// created or advanced and a robot may now be on the clock. It must be called during
+// startup wiring; the default (nil) leaves only the periodic driver scan. The robot
+// package wires its asynchronous TriggerMove here.
+func (svc *Service) SetAITrigger(trigger func(gameID uuid.UUID)) {
+	svc.aiTrigger = trigger
+}
+
+// SetNudgeClearer installs the hook that marks a mover's pending nudges read after
+// their move commits. It must be called during startup wiring; the default (nil)
+// leaves nudges to be cleared only when the recipient opens the move history or chat.
+// The social package wires its ClearNudges here.
+func (svc *Service) SetNudgeClearer(fn func(ctx context.Context, gameID, accountID uuid.UUID) error) {
+	svc.clearNudges = fn
+}
+
+// SetFirstMoveEntropy overrides the entropy source for the first-move draw
+// (docs/ARCHITECTURE.md §6). It must be called during wiring or test setup before any
+// game is created; the production default is crypto/rand and is never overridden.
+// factory returns a fresh draw function per game, so a stateful deterministic test
+// source restarts cleanly for each game. It exists for deterministic tests.
+func (svc *Service) SetFirstMoveEntropy(factory func() func(n int) (int, error)) {
+	if factory == nil {
+		return
+	}
+	svc.firstMoveEntropy = func() drawIntn { return drawIntn(factory()) }
+}
+
+// triggerAI fires the honest-AI fast-move hook for an active vs_ai game (best-effort,
+// fire-and-forget). It is a no-op for non-AI games, finished games and when no hook is
+// installed, so callers can invoke it unconditionally after a create or commit.
+func (svc *Service) triggerAI(g Game) {
+	if svc.aiTrigger != nil && g.VsAI && g.Status == StatusActive {
+		svc.aiTrigger(g.ID)
+	}
+}
+
 // activeVersion returns the dictionary version new games currently pin.
 func (svc *Service) activeVersion() string {
 	svc.verMu.RLock()
@@ -143,11 +196,17 @@ func (svc *Service) Create(ctx context.Context, params CreateParams) (Game, erro
 		return Game{}, fmt.Errorf("%w: hints per player must be >= 0", ErrInvalidConfig)
 	}
 	timeout := params.TurnTimeout
-	if timeout == 0 {
-		timeout = DefaultTurnTimeout
-	}
-	if !allowedTimeout(timeout) {
-		return Game{}, fmt.Errorf("%w: turn timeout %s not allowed", ErrInvalidConfig, timeout)
+	if params.VsAI {
+		// Honest-AI games use the fixed 7-day inactivity clock, not a user-chosen value
+		// from AllowedTurnTimeouts (it is never offered in the creation UI).
+		timeout = AIInactivityTimeout
+	} else {
+		if timeout == 0 {
+			timeout = DefaultTurnTimeout
+		}
+		if !allowedTimeout(timeout) {
+			return Game{}, fmt.Errorf("%w: turn timeout %s not allowed", ErrInvalidConfig, timeout)
+		}
 	}
 	seen := make(map[uuid.UUID]bool, len(params.Seats))
 	for _, id := range params.Seats {
@@ -155,12 +214,35 @@ func (svc *Service) Create(ctx context.Context, params CreateParams) (Game, erro
 			return Game{}, fmt.Errorf("%w: account %s seated twice", ErrInvalidConfig, id)
 		}
 		seen[id] = true
-		if _, err := svc.accounts.GetByID(ctx, id); err != nil {
+	}
+
+	// Decide who moves first by the official draw (docs/ARCHITECTURE.md §6): each seated
+	// account draws a tile, the one closest to "A" leads (a blank supersedes all letters),
+	// ties re-drawing until a single leader remains. Each draw uses fresh entropy, not the
+	// game seed, so the recorded draws — persisted with the game — are the only account of
+	// the outcome. The winner takes seat 0; the rest keep their order.
+	seeding, err := seedFirstMove(params.Variant, params.Seats, svc.firstMoveEntropy())
+	if err != nil {
+		if errors.Is(err, engine.ErrUnknownVariant) {
+			return Game{}, fmt.Errorf("%w: %v", ErrInvalidConfig, err)
+		}
+		return Game{}, err
+	}
+
+	// Build the seats in the drawn turn order, snapshotting each seat's display name. For a
+	// vs-AI game this stamps the robot's seeded account name (unchanged behaviour); a
+	// disguised auto-match robot instead gets a fresh per-game name when the reaper attaches
+	// it (AttachRobot).
+	seats := make([]seatInsert, len(seeding.order))
+	for i, id := range seeding.order {
+		acc, err := svc.accounts.GetByID(ctx, id)
+		if err != nil {
 			if errors.Is(err, account.ErrNotFound) {
 				return Game{}, fmt.Errorf("%w: account %s not found", ErrInvalidConfig, id)
 			}
 			return Game{}, err
 		}
+		seats[i] = seatInsert{accountID: id, displayName: acc.DisplayName}
 	}
 
 	seed := params.Seed
@@ -200,26 +282,36 @@ func (svc *Service) Create(ctx context.Context, params CreateParams) (Game, erro
 		hintsPerPlayer:       params.HintsPerPlayer,
 		dropoutTiles:         params.DropoutTiles.String(),
 		multipleWordsPerTurn: params.MultipleWordsPerTurn,
+		vsAI:                 params.VsAI,
 	}
-	if err := svc.store.CreateGame(ctx, ins, params.Seats); err != nil {
+	if err := svc.store.CreateGame(ctx, ins, seats, seeding.draws); err != nil {
 		return Game{}, err
 	}
-	svc.cache.put(id, g, params.Variant.String())
-	svc.metrics.recordStarted(ctx, params.Variant)
-	return svc.store.GetGame(ctx, id)
+	svc.metrics.recordStarted(ctx, params.Variant, params.VsAI)
+	created, err := svc.store.GetGame(ctx, id)
+	if err != nil {
+		return Game{}, err
+	}
+	svc.cache.put(id, g, params.Variant.String(), created.Seats)
+	// Honest-AI game seated with a robot: if the robot moves first, reply at once
+	// (the periodic driver is the fallback). No-op for every human-only game.
+	svc.triggerAI(created)
+	return created, nil
 }
 
 // OpenOrJoin enters accountID into auto-match for the variant and per-turn rule in
 // params and returns the game they land in immediately: another waiting player's open
-// game (joined=true), the caller's own still-open game on a re-enqueue, or a fresh open
-// game seating only the caller with an empty opponent seat that a human or the reaper's
-// robot fills later. openDeadline is when the reaper substitutes a robot into a freshly
-// opened game (ignored when joining one). The bag seed defaults to random; params.Seed
+// game (joined=true), or a fresh open game seating only the caller with an empty
+// opponent seat that a human or the reaper's robot fills later. A re-enqueue while the
+// caller is already waiting opens another game rather than returning their own.
+// openDeadline is when the reaper substitutes a robot into a freshly opened game
+// (ignored when joining one). The bag seed defaults to random; params.Seed
 // pins it. First-move fairness comes from seating the caller at seat 0 or seat 1
 // (derived from the seed): seated at seat 1, the still-empty seat 0 moves first, so the
 // caller just waits for the opponent. It backs the lobby auto-match enqueue.
-func (svc *Service) OpenOrJoin(ctx context.Context, accountID uuid.UUID, params CreateParams, openDeadline time.Time) (Game, bool, error) {
-	if _, err := svc.accounts.GetByID(ctx, accountID); err != nil {
+func (svc *Service) OpenOrJoin(ctx context.Context, accountID uuid.UUID, params CreateParams, openDeadline time.Time, exclude []uuid.UUID) (Game, bool, error) {
+	acc, err := svc.accounts.GetByID(ctx, accountID)
+	if err != nil {
 		if errors.Is(err, account.ErrNotFound) {
 			return Game{}, false, fmt.Errorf("%w: account %s not found", ErrInvalidConfig, accountID)
 		}
@@ -255,18 +347,32 @@ func (svc *Service) OpenOrJoin(ctx context.Context, accountID uuid.UUID, params
 		status:               StatusOpen,
 		openDeadline:         &deadline,
 	}
-	// Seat the caller at seat 0 or seat 1 (seat 0 always moves first); the other seat
-	// is left empty (uuid.Nil) for the opponent.
-	seats := []uuid.UUID{accountID, uuid.Nil}
-	if seed&1 == 1 {
-		seats = []uuid.UUID{uuid.Nil, accountID}
+	// Decide the first move now by the official draw, with the not-yet-arrived opponent as a
+	// synthetic placeholder (uuid.Nil): the draw fixes who sits at seat 0 — and so moves
+	// first — before either player acts (docs/ARCHITECTURE.md §6). The caller takes their
+	// drawn seat; the opponent seat is left empty. The opponent's draw rows are recorded with
+	// a NULL account and back-filled when a real opponent joins. Each draw uses fresh entropy,
+	// not the game seed. seats/draws are used only when a fresh game is opened.
+	seeding, err := seedFirstMove(params.Variant, []uuid.UUID{accountID, uuid.Nil}, svc.firstMoveEntropy())
+	if err != nil {
+		if errors.Is(err, engine.ErrUnknownVariant) {
+			return Game{}, false, fmt.Errorf("%w: %v", ErrInvalidConfig, err)
+		}
+		return Game{}, false, err
 	}
-	gameID, joined, created, err := svc.store.OpenOrJoin(ctx, accountID, ins, seats)
+	caller := seatInsert{accountID: accountID, displayName: acc.DisplayName}
+	seats := make([]seatInsert, len(seeding.order))
+	for seat, who := range seeding.order {
+		if who == accountID {
+			seats[seat] = caller // the empty opponent seat stays a zero seatInsert
+		}
+	}
+	gameID, joined, created, err := svc.store.OpenOrJoin(ctx, accountID, acc.DisplayName, ins, seats, exclude, seeding.draws)
 	if err != nil {
 		return Game{}, false, err
 	}
 	if created {
-		svc.metrics.recordStarted(ctx, params.Variant)
+		svc.metrics.recordStarted(ctx, params.Variant, params.VsAI)
 	}
 	g, err := svc.store.GetGame(ctx, gameID)
 	if err != nil {
@@ -275,11 +381,12 @@ func (svc *Service) OpenOrJoin(ctx context.Context, accountID uuid.UUID, params
 	return g, joined, nil
 }
 
-// AttachRobot seats robotID in the empty opponent seat of open game gameID and flips
-// it to active, returning the now-active game and whether it attached (false, with a
-// zero Game, when a human joined first). It backs the matchmaking reaper.
-func (svc *Service) AttachRobot(ctx context.Context, gameID, robotID uuid.UUID) (Game, bool, error) {
-	attached, err := svc.store.AttachRobot(ctx, gameID, robotID)
+// AttachRobot seats robotID in the empty opponent seat of open game gameID, stamping
+// displayName (the robot's fresh per-game name) on the seat, and flips it to active,
+// returning the now-active game and whether it attached (false, with a zero Game, when a
+// human joined first). It backs the matchmaking reaper.
+func (svc *Service) AttachRobot(ctx context.Context, gameID, robotID uuid.UUID, displayName string) (Game, bool, error) {
+	attached, err := svc.store.AttachRobot(ctx, gameID, robotID, displayName)
 	if err != nil {
 		return Game{}, false, err
 	}
@@ -368,7 +475,7 @@ func (svc *Service) Resign(ctx context.Context, gameID, accountID uuid.UUID) (Mo
 	if err != nil {
 		return MoveResult{}, err
 	}
-	post, err := svc.commit(ctx, gameID, g, rec, rec.Action.String(), rackBefore, nil, pre.Seats)
+	post, err := svc.commit(ctx, gameID, g, rec, rec.Action.String(), rackBefore, nil, pre.Seats, pre.VsAI)
 	if err != nil {
 		return MoveResult{}, err
 	}
@@ -447,16 +554,6 @@ func (svc *Service) GameVariant(ctx context.Context, gameID uuid.UUID) (engine.V
 	return svc.store.GetGameVariant(ctx, gameID)
 }
 
-// GameLanguage returns the game's language tag ("en"/"ru"), derived from its variant, so a
-// game push routes out-of-app to the game's own bot rather than the recipient's last-login bot.
-func (svc *Service) GameLanguage(ctx context.Context, gameID uuid.UUID) (string, error) {
-	v, err := svc.GameVariant(ctx, gameID)
-	if err != nil {
-		return "", err
-	}
-	return v.Language(), nil
-}
-
 // RobotSchedule returns a game's bag seed and turn-start time, for the admin console's
 // robot-schedule panel (the deterministic play-to-win intent and next-move ETA).
 func (svc *Service) RobotSchedule(ctx context.Context, gameID uuid.UUID) (seed int64, turnStartedAt time.Time, err error) {
@@ -488,8 +585,9 @@ func (svc *Service) transition(ctx context.Context, gameID, accountID uuid.UUID,
 		return MoveResult{}, ErrNotAPlayer
 	}
 	// A move is allowed while the game is active or still open (the starter may move on
-	// their turn before an opponent joins); only a finished game rejects it. The turn
-	// check below keeps the starter off the still-empty opponent seat.
+	// their turn before an opponent joins; the first-move draw ran when the game opened, so
+	// the seats are already fixed); only a finished game rejects it. The turn check below
+	// keeps the starter off the still-empty opponent seat.
 	if pre.Status == StatusFinished {
 		return MoveResult{}, ErrFinished
 	}
@@ -516,11 +614,18 @@ func (svc *Service) transition(ctx context.Context, gameID, accountID uuid.UUID,
 	if err != nil {
 		return MoveResult{}, err
 	}
-	post, err := svc.commit(ctx, gameID, g, rec, rec.Action.String(), rackBefore, exchanged, pre.Seats)
+	post, err := svc.commit(ctx, gameID, g, rec, rec.Action.String(), rackBefore, exchanged, pre.Seats, pre.VsAI)
 	if err != nil {
 		return MoveResult{}, err
 	}
 	svc.afterCommitDrafts(ctx, gameID, accountID, rec)
+	// A nudge the actor answered by moving stops counting as unread (best-effort; the
+	// move has committed, so a cleanup failure is logged, not surfaced).
+	if svc.clearNudges != nil {
+		if err := svc.clearNudges(ctx, gameID, accountID); err != nil {
+			svc.log.Warn("clear nudges after move", zap.Error(err))
+		}
+	}
 	// Record the seat's think time (turn start to commit) for the move-duration
 	// metric; the timeout path commits separately and is excluded by design.
 	svc.metrics.recordMoveDuration(ctx, pre.Variant, post.MoveCount, svc.clock().Sub(pre.TurnStartedAt))
@@ -546,7 +651,7 @@ func (svc *Service) afterCommitDrafts(ctx context.Context, gameID, accountID uui
 // cursor and scores, and on a game-ending move the finish stamp and statistics.
 // On a persistence failure it evicts the now-divergent live game so the next
 // access rebuilds from the journal.
-func (svc *Service) commit(ctx context.Context, gameID uuid.UUID, g *engine.Game, rec engine.MoveRecord, action string, rackBefore, exchanged []string, seats []Seat) (Game, error) {
+func (svc *Service) commit(ctx context.Context, gameID uuid.UUID, g *engine.Game, rec engine.MoveRecord, action string, rackBefore, exchanged []string, seats []Seat, vsAI bool) (Game, error) {
 	now := svc.clock()
 	logLen := len(g.Log())
 	scores := make([]int, g.Players())
@@ -577,12 +682,16 @@ func (svc *Service) commit(ctx context.Context, gameID uuid.UUID, g *engine.Game
 			c.endReason = "timeout"
 		}
 		c.winner = g.Result().Winner
-		statSeats, err := svc.nonGuestSeats(ctx, seats)
-		if err != nil {
-			svc.cache.remove(gameID)
-			return Game{}, err
+		// Honest-AI games are practice and never touch player statistics (like guest
+		// games); a human game records them for its non-guest seats.
+		if !vsAI {
+			statSeats, err := svc.nonGuestSeats(ctx, seats)
+			if err != nil {
+				svc.cache.remove(gameID)
+				return Game{}, err
+			}
+			c.stats = buildStats(g, statSeats)
 		}
-		c.stats = buildStats(g, statSeats)
 	}
 	if err := svc.store.CommitMove(ctx, c); err != nil {
 		svc.cache.remove(gameID)
@@ -596,13 +705,17 @@ func (svc *Service) commit(ctx context.Context, gameID uuid.UUID, g *engine.Game
 		return Game{}, err
 	}
 	svc.emitMove(ctx, post, rec, g.BagLen())
+	// Honest-AI game still going: nudge the robot to take its turn at once (the
+	// periodic driver is the fallback). No-op for human games and finished ones.
+	svc.triggerAI(post)
 	return post, nil
 }
 
 // emitMove publishes the live events for a just-committed move: opponent_moved to
 // every seat — including the actor's own account, so the mover's other devices (and
-// their lobby) refresh too — and your_turn to the next mover while the game is still
-// active. opponent_moved is in-app only (the gateway never turns it into an
+// their lobby) refresh too — and, in human games only, your_turn to the next mover
+// while the game is still active (an honest-AI game suppresses your_turn, since the
+// robot replies at once). opponent_moved is in-app only (the gateway never turns it into an
 // out-of-app push), so the actor is not notified out of band about their own move.
 // Delivery is best-effort (notify.Publisher never blocks) and the gateway fans each
 // event out to all of the recipient's live streams.
@@ -617,12 +730,12 @@ func (svc *Service) emitMove(ctx context.Context, post Game, rec engine.MoveReco
 		}
 		intents = append(intents, notify.OpponentMoved(s.AccountID, post.ID, rec, summary, bagLen))
 	}
-	// Game pushes are routed out-of-app by the game's own language, not the recipient's
-	// last-login bot.
-	lang := post.Variant.Language()
 	switch post.Status {
 	case StatusActive:
-		if next, ok := seatAccount(post.Seats, post.ToMove); ok {
+		// Honest-AI games suppress your_turn: the robot replies instantly, so a "your turn"
+		// notification would arrive together with the AI's move and carry no value — the
+		// human's UI already advances from opponent_moved. Only human games signal the mover.
+		if next, ok := seatAccount(post.Seats, post.ToMove); ok && !post.VsAI {
 			deadline := post.TurnStartedAt.Add(post.TurnTimeout)
 			action := rec.Action.String()
 			word := ""
@@ -631,7 +744,6 @@ func (svc *Service) emitMove(ctx context.Context, post Game, rec engine.MoveReco
 			}
 			opponent := svc.displayName(ctx, post.Seats, rec.Player)
 			yourTurn := notify.YourTurn(next, post.ID, deadline, opponent, action, word, scoreLine(post, post.ToMove), post.MoveCount)
-			yourTurn.Language = lang
 			intents = append(intents, yourTurn)
 		}
 	case StatusFinished:
@@ -643,28 +755,37 @@ func (svc *Service) emitMove(ctx context.Context, post Game, rec engine.MoveReco
 				continue
 			}
 			over := notify.GameOver(s.AccountID, post.ID, seatResult(post.Seats, s.Seat), scoreLine(post, s.Seat), summary)
-			over.Language = lang
 			intents = append(intents, over)
 		}
 	}
 	svc.pub.Publish(intents...)
 }
 
-// displayName resolves the display name of the account at the given seat, or "" when the seat
-// is absent or the lookup fails (the enriched push then falls back to its plain text).
+// seatDisplayName returns the name shown for a seat: its captured display-name snapshot
+// (docs/ARCHITECTURE.md §7), falling back to the account's current display name for a
+// pre-snapshot legacy row, or "" when neither is available.
+func (svc *Service) seatDisplayName(ctx context.Context, s Seat) string {
+	if s.DisplayName != "" {
+		return s.DisplayName
+	}
+	if svc.accounts == nil || s.AccountID == uuid.Nil {
+		return ""
+	}
+	if acc, err := svc.accounts.GetByID(ctx, s.AccountID); err == nil {
+		return acc.DisplayName
+	}
+	return ""
+}
+
+// displayName resolves the display name shown for the account at the given seat, or ""
+// when the seat is absent (the enriched push then falls back to its plain text).
 func (svc *Service) displayName(ctx context.Context, seats []Seat, seat int) string {
-	if svc.accounts == nil {
-		return ""
+	for _, s := range seats {
+		if s.Seat == seat {
+			return svc.seatDisplayName(ctx, s)
+		}
 	}
-	id, ok := seatAccount(seats, seat)
-	if !ok {
-		return ""
-	}
-	acc, err := svc.accounts.GetByID(ctx, id)
-	if err != nil {
-		return ""
-	}
-	return acc.DisplayName
+	return ""
 }
 
 // scoreLine formats the running scores with recipientSeat's score first, then the remaining
@@ -759,36 +880,45 @@ func (svc *Service) timeoutGame(ctx context.Context, gameID uuid.UUID, now time.
 	if err != nil {
 		return false, err
 	}
-	if _, err := svc.commit(ctx, gameID, g, rec, "timeout", rackBefore, nil, cur.Seats); err != nil {
+	if _, err := svc.commit(ctx, gameID, g, rec, "timeout", rackBefore, nil, cur.Seats, cur.VsAI); err != nil {
 		return false, err
 	}
-	svc.metrics.recordAbandoned(ctx, cur.Variant)
+	svc.metrics.recordAbandoned(ctx, cur.Variant, cur.VsAI)
 	return true, nil
 }
 
 // EvaluatePlay previews a tentative play for a seated player against the current
 // board without committing it: whether it is legal and what it would score.
 func (svc *Service) EvaluatePlay(ctx context.Context, gameID, accountID uuid.UUID, tiles []engine.TileRecord) (EvalResult, error) {
-	pre, err := svc.store.GetGame(ctx, gameID)
-	if err != nil {
-		return EvalResult{}, err
-	}
-	if _, ok := pre.seatOf(accountID); !ok {
-		return EvalResult{}, ErrNotAPlayer
-	}
-	if pre.Status == StatusFinished {
-		return EvalResult{}, ErrFinished
-	}
-
 	unlock := svc.locks.lock(gameID)
 	defer unlock()
-	g, err := svc.liveGame(ctx, pre)
-	if err != nil {
-		return EvalResult{}, err
+
+	// Hot path: an active game stays cached — the engine game is mutated in place across
+	// moves and evicted only when it finishes — so on a hit the cached live game and its
+	// immutable seat list answer the membership check and the score with no DB read. This
+	// preview is fired on every tile placement, the hottest gameplay call at scale.
+	g, seats, ok := svc.cache.get(gameID)
+	if !ok {
+		// Cold path: load and validate from the store, then replay into the cache.
+		pre, err := svc.store.GetGame(ctx, gameID)
+		if err != nil {
+			return EvalResult{}, err
+		}
+		if pre.Status == StatusFinished {
+			return EvalResult{}, ErrFinished
+		}
+		if g, err = svc.liveGame(ctx, pre); err != nil {
+			return EvalResult{}, err
+		}
+		seats = pre.Seats
 	}
+	if !seatedIn(seats, accountID) {
+		return EvalResult{}, ErrNotAPlayer
+	}
+
 	validateStart := time.Now()
 	rec, err := g.EvaluatePlay(tiles)
-	svc.metrics.recordValidate(ctx, pre.Variant, validateStart)
+	svc.metrics.recordValidate(ctx, g.Variant(), validateStart)
 	if err != nil {
 		if errors.Is(err, engine.ErrIllegalPlay) {
 			return EvalResult{Valid: false}, nil
@@ -941,12 +1071,7 @@ func (svc *Service) Hint(ctx context.Context, gameID, accountID uuid.UUID) (Hint
 	}
 
 	walletAfter := acc.HintBalance
-	if fromAllowance {
-		if err := svc.store.SpendHintAllowance(ctx, gameID, seat); err != nil {
-			return HintResult{}, err
-		}
-		used++
-	} else {
+	if !fromAllowance {
 		spent, err := svc.accounts.SpendHint(ctx, accountID)
 		if err != nil {
 			return HintResult{}, err
@@ -956,7 +1081,14 @@ func (svc *Service) Hint(ctx context.Context, gameID, accountID uuid.UUID) (Hint
 		}
 		walletAfter--
 	}
-	return HintResult{Move: move, HintsRemaining: hintsRemaining(pre.HintsPerPlayer, used, walletAfter)}, nil
+	// hints_used is the per-game total (allowance + wallet): every hint increments it. The first
+	// HintsPerPlayer hints are the free allowance (so fromAllowance above stays correct); the rest
+	// are charged to the wallet. Counting all hints feeds the player's lifetime hint statistics.
+	if err := svc.store.IncHintsUsed(ctx, gameID, seat); err != nil {
+		return HintResult{}, err
+	}
+	used++
+	return HintResult{Move: move, HintsRemaining: hintsRemaining(pre.HintsPerPlayer, used, walletAfter), WalletBalance: walletAfter}, nil
 }
 
 // Candidates returns the to-move player's legal plays for a seated player on
@@ -996,6 +1128,20 @@ func (svc *Service) RobotTurns(ctx context.Context, robotIDs []uuid.UUID) ([]Rob
 	return svc.store.RobotTurns(ctx, robotIDs)
 }
 
+// RobotTurn returns the robot driver's view of a single active game seating one of
+// robotIDs, and true, or false when the game holds no pooled robot or is no longer
+// active. It backs the honest-AI fast-move trigger, which drives just the one game.
+func (svc *Service) RobotTurn(ctx context.Context, gameID uuid.UUID, robotIDs []uuid.UUID) (RobotTurn, bool, error) {
+	return svc.store.RobotTurnByGame(ctx, gameID, robotIDs)
+}
+
+// VsAI reports whether a game is an honest-AI game (games.vs_ai). The social
+// service uses it to reject chat and nudge in AI games (which otherwise report
+// status 'active').
+func (svc *Service) VsAI(ctx context.Context, gameID uuid.UUID) (bool, error) {
+	return svc.store.GameVsAI(ctx, gameID)
+}
+
 // GameState returns a seated player's view of the game: the shared summary plus
 // their private rack, the bag size and their remaining hint budget.
 func (svc *Service) GameState(ctx context.Context, gameID, accountID uuid.UUID) (StateView, error) {
@@ -1030,6 +1176,7 @@ func (svc *Service) GameState(ctx context.Context, gameID, accountID uuid.UUID)
 		Rack:           g.Hand(seat),
 		BagLen:         g.BagLen(),
 		HintsRemaining: hintsRemaining(pre.HintsPerPlayer, pre.Seats[seat].HintsUsed, acc.HintBalance),
+		WalletBalance:  acc.HintBalance,
 	}, nil
 }
 
@@ -1063,6 +1210,23 @@ func (svc *Service) Participants(ctx context.Context, gameID uuid.UUID) ([]uuid.
 	return seats, g.ToMove, g.Status, nil
 }
 
+// SeatName returns the display name shown for the account seated in the game — the seat's
+// captured snapshot, falling back to the account's current name (see seatDisplayName) — or ""
+// when the account holds no seat. It lets the social package name a nudge's sender by the same
+// per-game identity the rest of the game uses, without exposing the seats.
+func (svc *Service) SeatName(ctx context.Context, gameID, accountID uuid.UUID) (string, error) {
+	g, err := svc.store.GetGame(ctx, gameID)
+	if err != nil {
+		return "", err
+	}
+	for _, s := range g.Seats {
+		if s.AccountID == accountID {
+			return svc.seatDisplayName(ctx, s), nil
+		}
+	}
+	return "", nil
+}
+
 // SharedGame reports whether accounts a and b are seated together in any game
 // (active or finished). It backs the social package's "befriend an opponent"
 // request gate without exposing the games tables; a self-pair is never shared.
@@ -1073,13 +1237,45 @@ func (svc *Service) SharedGame(ctx context.Context, a, b uuid.UUID) (bool, error
 	return svc.store.SharedGameExists(ctx, a, b)
 }
 
-// ListForAccount returns every game the account is seated in, newest first, for the
-// lobby's active/finished lists. The live position is not loaded — the summaries come
-// straight from the durable rows.
+// ListForAccount returns every game the account is seated in, newest first — the full
+// set behind the admin console, the account-merge count and the block-time forfeit
+// sweep. The player's own lobby uses ListForLobby, which drops the honest-AI games the
+// player left. The live position is not loaded — the summaries come straight from the
+// durable rows.
 func (svc *Service) ListForAccount(ctx context.Context, accountID uuid.UUID) ([]Game, error) {
 	return svc.store.ListGamesForAccount(ctx, accountID)
 }
 
+// ListForLobby returns the games shown in the account's own lobby: ListForAccount minus
+// the honest-AI games the player left — by resigning or by abandoning to the inactivity
+// timeout (games.end_reason 'resign'/'timeout') — which drop out of the finished list
+// automatically. The robot never leaves (it moves at once, never sleeps, never resigns),
+// so only a human's departure matches; the predicate is a game property, not a seat
+// check, so it extends to any player should the robot ever resign. Admin and
+// account-merge views keep using ListForAccount and see the full set.
+func (svc *Service) ListForLobby(ctx context.Context, accountID uuid.UUID) ([]Game, error) {
+	games, err := svc.ListForAccount(ctx, accountID)
+	if err != nil {
+		return nil, err
+	}
+	kept := games[:0]
+	for _, g := range games {
+		if g.VsAI && (g.EndReason == "resign" || g.EndReason == "timeout") {
+			continue
+		}
+		kept = append(kept, g)
+	}
+	return kept, nil
+}
+
+// CountActiveQuickGames reports how many in-progress quick games the account holds —
+// the count the simultaneous-game limit (MaxActiveQuickGames) is checked against. It
+// counts active and still-open quick games (including honest-AI ones) and excludes
+// friend games created by invitation and finished games. See Store.CountActiveQuickGames.
+func (svc *Service) CountActiveQuickGames(ctx context.Context, accountID uuid.UUID) (int, error) {
+	return svc.store.CountActiveQuickGames(ctx, accountID)
+}
+
 // HideGame hides a finished game from accountID's own lobby (it stays visible to the other
 // players); it is irreversible by design. Only a player of a finished game may hide it
 // (ErrNotAPlayer / ErrGameActive otherwise); hiding an already-hidden game is a no-op.
@@ -1134,6 +1330,14 @@ func (svc *Service) History(ctx context.Context, gameID uuid.UUID) (HistoryView,
 	return HistoryView{Game: g, Moves: moves}, nil
 }
 
+// SetupDraws returns a game's recorded first-move draws (docs/ARCHITECTURE.md §6), ordered by
+// round then pick. It backs the admin console's first-move section. An auto-match opponent's
+// draws carry uuid.Nil until a real opponent joins and back-fills them; an empty slice means
+// the game predates the draw record.
+func (svc *Service) SetupDraws(ctx context.Context, gameID uuid.UUID) ([]SetupDraw, error) {
+	return svc.store.SetupDraws(ctx, gameID)
+}
+
 // ExportGCG renders a game as GCG text from the journal alone (no dictionary). It
 // is allowed only on a finished game: exporting an in-progress game would leak the
 // full move journal mid-play, so an active game yields ErrGameActive.
@@ -1149,13 +1353,22 @@ func (svc *Service) ExportGCG(ctx context.Context, gameID uuid.UUID) (string, er
 	if err != nil {
 		return "", err
 	}
-	return writeGCG(g, svc.seatNames(ctx, g), moves), nil
+	names := svc.seatNames(ctx, g)
+	if g.VsAI {
+		// Label the robot seat "AI" in an honest-AI game's export, not its pool name.
+		for _, s := range g.Seats {
+			if robot, err := svc.accounts.IsRobot(ctx, s.AccountID); err == nil && robot {
+				names[s.Seat] = aiPlayerName
+			}
+		}
+	}
+	return writeGCG(g, names, moves), nil
 }
 
 // liveGame returns the live engine.Game for pre, rebuilding it from the journal
 // on a cache miss. Callers must hold the per-game lock.
 func (svc *Service) liveGame(ctx context.Context, pre Game) (*engine.Game, error) {
-	if g, ok := svc.cache.get(pre.ID); ok {
+	if g, _, ok := svc.cache.get(pre.ID); ok {
 		return g, nil
 	}
 	g, err := svc.replay(ctx, pre)
@@ -1170,7 +1383,7 @@ func (svc *Service) liveGame(ctx context.Context, pre Game) (*engine.Game, error
 		}
 	}
 	if !g.Over() {
-		svc.cache.put(pre.ID, g, pre.Variant.String())
+		svc.cache.put(pre.ID, g, pre.Variant.String(), pre.Seats)
 	}
 	return g, nil
 }
@@ -1261,19 +1474,45 @@ func replayMove(g *engine.Game, mv HistoryMove) error {
 }
 
 // buildStats derives each seat's statistics contribution from a finished game:
-// win/loss/draw from the (resignation-aware) winner, the final score, and the
-// best single-move score from the log.
+// win/loss/draw from the (resignation-aware) winner, the final score, and the best
+// single play from the log — its score and, for the per-variant breakdown, its main
+// word as rendering tiles. Blank flags are taken from every blank ever placed (so a
+// blank laid by an earlier move and embedded in the best word is honoured), which is
+// equivalent to reading the final board since a placed tile never moves.
 func buildStats(g *engine.Game, seats []Seat) []statDelta {
 	res := g.Result()
-	best := make(map[int]int)
+	bestRec := make(map[int]engine.MoveRecord)
+	blanks := make(map[[2]int]bool)
+	plays := make(map[int]int) // per player: count of plays (tile placements), for the "moves" stat
 	for _, rec := range g.Log() {
-		if rec.Action == engine.ActionPlay && rec.Score > best[rec.Player] {
-			best[rec.Player] = rec.Score
+		if rec.Action != engine.ActionPlay {
+			continue
+		}
+		plays[rec.Player]++
+		for _, t := range rec.Tiles {
+			if t.Blank {
+				blanks[[2]int{t.Row, t.Col}] = true
+			}
+		}
+		if cur, ok := bestRec[rec.Player]; !ok || rec.Score > cur.Score {
+			bestRec[rec.Player] = rec
 		}
 	}
+	variant := g.Variant().String()
+	values := letterValues(g.Variant())
 	out := make([]statDelta, 0, len(seats))
 	for _, s := range seats {
-		d := statDelta{accountID: s.AccountID, gamePoints: g.Score(s.Seat), wordPoints: best[s.Seat]}
+		// moves counts the seat's plays; hintsUsed is the seat's total hints this game. Both are
+		// summed into account_stats so the screen can show the hint share (hints_used / moves).
+		d := statDelta{accountID: s.AccountID, gamePoints: g.Score(s.Seat), moves: plays[s.Seat], hintsUsed: s.HintsUsed}
+		if rec, ok := bestRec[s.Seat]; ok {
+			d.wordPoints = rec.Score
+			if rec.Score > 0 {
+				d.bestVariant = variant
+				d.bestScore = rec.Score
+				d.bestTiles = mainWordTiles(rec, blanks, values)
+			}
+		}
 		switch {
 		case res.Winner < 0:
 			d.draws = 1
@@ -1287,6 +1526,49 @@ func buildStats(g *engine.Game, seats []Seat) []statDelta {
 	return out
 }
 
+// letterValues builds a lower-cased letter -> tile value lookup for a variant from the
+// engine's alphabet table, so a best-move word can be rendered with per-tile values on a
+// screen (statistics) that has not cached the variant's alphabet. It is empty for an
+// unrecognised variant, leaving every value zero.
+func letterValues(v engine.Variant) map[string]int {
+	table, err := engine.AlphabetTable(v)
+	if err != nil {
+		return nil
+	}
+	m := make(map[string]int, len(table))
+	for _, e := range table {
+		m[strings.ToLower(e.Letter)] = e.Value
+	}
+	return m
+}
+
+// mainWordTiles decodes a play's main word into rendering tiles: each letter with its
+// tile value (0 for a blank) and blank flag. blanks is the set of board coordinates a
+// blank was ever placed on; values maps a lower-cased letter to its tile value. It walks
+// the word from its first-letter coordinate along the play's orientation.
+func mainWordTiles(rec engine.MoveRecord, blanks map[[2]int]bool, values map[string]int) []account.BestMoveTile {
+	if len(rec.Words) == 0 {
+		return nil
+	}
+	dr, dc := 0, 1
+	if rec.Dir == engine.Vertical {
+		dr, dc = 1, 0
+	}
+	letters := []rune(rec.Words[0])
+	out := make([]account.BestMoveTile, len(letters))
+	for i, r := range letters {
+		row, col := rec.MainRow+i*dr, rec.MainCol+i*dc
+		blank := blanks[[2]int{row, col}]
+		letter := string(r)
+		value := 0
+		if !blank {
+			value = values[strings.ToLower(letter)]
+		}
+		out[i] = account.BestMoveTile{Letter: letter, Value: value, Blank: blank}
+	}
+	return out
+}
+
 // nonGuestSeats filters out guest seats so the finish-time statistics are
 // recomputed for durable non-guest accounts only — guests never accrue
 // statistics (docs/ARCHITECTURE.md §9). It is called once per game, on finish.
@@ -1305,15 +1587,13 @@ func (svc *Service) nonGuestSeats(ctx context.Context, seats []Seat) ([]Seat, er
 	return out, nil
 }
 
-// seatNames resolves each seat's display name for GCG export.
+// seatNames resolves each seat's display name — its captured snapshot, else the
+// account's current name (seatDisplayName) — for game state and GCG export.
 func (svc *Service) seatNames(ctx context.Context, g Game) []string {
 	names := make([]string, g.Players)
-	if svc.accounts == nil {
-		return names
-	}
 	for _, s := range g.Seats {
-		if acc, err := svc.accounts.GetByID(ctx, s.AccountID); err == nil {
-			names[s.Seat] = acc.DisplayName
+		if s.Seat >= 0 && s.Seat < len(names) {
+			names[s.Seat] = svc.seatDisplayName(ctx, s)
 		}
 	}
 	return names

backend/internal/game/stats_test.go

@@ -0,0 +1,50 @@
+package game
+
+import (
+	"reflect"
+	"testing"
+
+	"scrabble/backend/internal/account"
+	"scrabble/backend/internal/engine"
+)
+
+// TestMainWordTilesHorizontalWithBlank checks that a horizontal main word is decoded into
+// tiles along its row, that the per-letter value is looked up from the value table, and that
+// a blank cell (here the middle 'a') is rendered with a zero value regardless of its letter
+// value — the blank flag is taken from the placed-blank set, not from this move's own tiles.
+func TestMainWordTilesHorizontalWithBlank(t *testing.T) {
+	rec := engine.MoveRecord{Dir: engine.Horizontal, MainRow: 7, MainCol: 5, Words: []string{"cat"}}
+	blanks := map[[2]int]bool{{7, 6}: true}
+	values := map[string]int{"c": 3, "a": 1, "t": 1}
+	got := mainWordTiles(rec, blanks, values)
+	want := []account.BestMoveTile{
+		{Letter: "c", Value: 3, Blank: false},
+		{Letter: "a", Value: 0, Blank: true},
+		{Letter: "t", Value: 1, Blank: false},
+	}
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("mainWordTiles = %+v, want %+v", got, want)
+	}
+}
+
+// TestMainWordTilesVerticalCyrillic checks vertical walk and multi-byte (Cyrillic) letters:
+// the word must be split by rune, not byte, and laid down its column.
+func TestMainWordTilesVerticalCyrillic(t *testing.T) {
+	rec := engine.MoveRecord{Dir: engine.Vertical, MainRow: 3, MainCol: 8, Words: []string{"съёмка"}}
+	values := map[string]int{"с": 1, "ъ": 10, "ё": 4, "м": 2, "к": 2, "а": 1}
+	got := mainWordTiles(rec, map[[2]int]bool{}, values)
+	want := []account.BestMoveTile{
+		{Letter: "с", Value: 1}, {Letter: "ъ", Value: 10}, {Letter: "ё", Value: 4},
+		{Letter: "м", Value: 2}, {Letter: "к", Value: 2}, {Letter: "а", Value: 1},
+	}
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("mainWordTiles = %+v, want %+v", got, want)
+	}
+}
+
+// TestMainWordTilesNoWord checks the defensive nil for a record carrying no words.
+func TestMainWordTilesNoWord(t *testing.T) {
+	if got := mainWordTiles(engine.MoveRecord{}, nil, nil); got != nil {
+		t.Errorf("mainWordTiles(no words) = %+v, want nil", got)
+	}
+}

backend/internal/game/store.go

@@ -3,6 +3,7 @@ package game
 import (
 	"context"
 	"database/sql"
+	"encoding/json"
 	"errors"
 	"fmt"
 	"hash/fnv"
@@ -12,6 +13,7 @@ import (
 	"github.com/go-jet/jet/v2/qrm"
 	"github.com/google/uuid"
 
+	"scrabble/backend/internal/account"
 	"scrabble/backend/internal/engine"
 	"scrabble/backend/internal/postgres/jet/backend/model"
 	"scrabble/backend/internal/postgres/jet/backend/table"
@@ -41,6 +43,8 @@ type gameInsert struct {
 	dropoutTiles    string
 	// multipleWordsPerTurn false selects the single-word rule for the game.
 	multipleWordsPerTurn bool
+	// vsAI marks an honest-AI game (games.vs_ai).
+	vsAI bool
 	// status is the lifecycle state to create the game in: StatusActive for a normal
 	// seated game, StatusOpen for an auto-match game still awaiting an opponent. An
 	// empty string defaults to StatusActive.
@@ -51,13 +55,22 @@ type gameInsert struct {
 }
 
 // statDelta is one account's contribution to its statistics on a game finish.
+// bestVariant/bestScore/bestTiles describe the game's best play for this account when
+// it scored (bestVariant empty otherwise): the variant label, the play's total score and
+// its main word as rendering tiles. They feed the per-variant account_best_move upsert,
+// which keeps only the account's highest-scoring play per variant.
 type statDelta struct {
-	accountID  uuid.UUID
-	wins       int
-	losses     int
-	draws      int
-	gamePoints int
-	wordPoints int
+	accountID   uuid.UUID
+	wins        int
+	losses      int
+	draws       int
+	gamePoints  int
+	wordPoints  int
+	moves       int // plays this game (tile placements), summed into account_stats.moves
+	hintsUsed   int // hints used this game (allowance + wallet), summed into account_stats.hints_used
+	bestVariant string
+	bestScore   int
+	bestTiles   []account.BestMoveTile
 }
 
 // commit is everything a single committed transition persists: the journal row,
@@ -106,18 +119,30 @@ type activeGame struct {
 	turnTimeoutSecs int
 }
 
-// CreateGame inserts the games row and one game_players row per seat (seat 0
-// first) inside a single transaction.
-func (s *Store) CreateGame(ctx context.Context, ins gameInsert, seats []uuid.UUID) error {
+// seatInsert is one seat to create: the account to seat (uuid.Nil for the still-empty
+// opponent seat of an open auto-match game) and the display-name snapshot to stamp on
+// it — the player's name as of when the seat was taken (account.go, docs/ARCHITECTURE.md §7).
+type seatInsert struct {
+	accountID   uuid.UUID
+	displayName string
+}
+
+// CreateGame inserts the games row, one game_players row per seat (seat 0 first) and
+// the first-move seeding draws inside a single transaction.
+func (s *Store) CreateGame(ctx context.Context, ins gameInsert, seats []seatInsert, draws []SetupDraw) error {
 	return withTx(ctx, s.db, func(tx *sql.Tx) error {
-		return insertGameTx(ctx, tx, ins, seats)
+		if err := insertGameTx(ctx, tx, ins, seats); err != nil {
+			return err
+		}
+		return insertSetupDrawsTx(ctx, tx, ins.id, draws)
 	})
 }
 
 // insertGameTx inserts the games row and one game_players row per seat (seat 0
-// first) on tx. A seat whose account id is uuid.Nil is written with a NULL
-// account_id — the still-empty opponent seat of a StatusOpen auto-match game.
-func insertGameTx(ctx context.Context, tx *sql.Tx, ins gameInsert, seats []uuid.UUID) error {
+// first) on tx, stamping each seat's display-name snapshot. A seat whose account id is
+// uuid.Nil is written with a NULL account_id (and an empty snapshot) — the still-empty
+// opponent seat of a StatusOpen auto-match game.
+func insertGameTx(ctx context.Context, tx *sql.Tx, ins gameInsert, seats []seatInsert) error {
 	status := ins.status
 	if status == "" {
 		status = StatusActive
@@ -130,20 +155,20 @@ func insertGameTx(ctx context.Context, tx *sql.Tx, ins gameInsert, seats []uuid.
 		table.Games.GameID, table.Games.Variant, table.Games.DictVersion, table.Games.Seed,
 		table.Games.Status, table.Games.Players, table.Games.TurnTimeoutSecs,
 		table.Games.HintsAllowed, table.Games.HintsPerPlayer, table.Games.OpenDeadlineAt,
-		table.Games.DropoutTiles, table.Games.MultipleWordsPerTurn,
+		table.Games.DropoutTiles, table.Games.MultipleWordsPerTurn, table.Games.VsAi,
 	).VALUES(ins.id, ins.variant, ins.dictVersion, ins.seed, status, ins.players,
-		ins.turnTimeoutSecs, ins.hintsAllowed, ins.hintsPerPlayer, deadline, ins.dropoutTiles, ins.multipleWordsPerTurn)
+		ins.turnTimeoutSecs, ins.hintsAllowed, ins.hintsPerPlayer, deadline, ins.dropoutTiles, ins.multipleWordsPerTurn, ins.vsAI)
 	if _, err := gi.ExecContext(ctx, tx); err != nil {
 		return fmt.Errorf("insert game: %w", err)
 	}
-	for seat, accountID := range seats {
-		var acc any = accountID
-		if accountID == uuid.Nil {
+	for seat, si := range seats {
+		var acc any = si.accountID
+		if si.accountID == uuid.Nil {
 			acc = postgres.NULL
 		}
 		pi := table.GamePlayers.INSERT(
-			table.GamePlayers.GameID, table.GamePlayers.Seat, table.GamePlayers.AccountID,
-		).VALUES(ins.id, seat, acc)
+			table.GamePlayers.GameID, table.GamePlayers.Seat, table.GamePlayers.AccountID, table.GamePlayers.DisplayName,
+		).VALUES(ins.id, seat, acc, si.displayName)
 		if _, err := pi.ExecContext(ctx, tx); err != nil {
 			return fmt.Errorf("insert seat %d: %w", seat, err)
 		}
@@ -151,6 +176,30 @@ func insertGameTx(ctx context.Context, tx *sql.Tx, ins gameInsert, seats []uuid.
 	return nil
 }
 
+// insertSetupDrawsTx appends the first-move seeding draws for game gameID on tx —
+// the dictionary-independent record of how the first player was chosen
+// (docs/ARCHITECTURE.md §6). The games row must already exist on tx (the foreign
+// key), so it runs after insertGameTx. An empty draws slice is a no-op.
+func insertSetupDrawsTx(ctx context.Context, tx *sql.Tx, gameID uuid.UUID, draws []SetupDraw) error {
+	for _, d := range draws {
+		// A uuid.Nil account marks the synthetic opponent of an auto-match draw, persisted as
+		// a NULL account_id and back-filled when a real opponent joins.
+		var acc any = d.Account
+		if d.Account == uuid.Nil {
+			acc = postgres.NULL
+		}
+		di := table.GameSetupDraws.INSERT(
+			table.GameSetupDraws.GameID, table.GameSetupDraws.Round, table.GameSetupDraws.PickNo,
+			table.GameSetupDraws.AccountID, table.GameSetupDraws.Letter, table.GameSetupDraws.IsBlank,
+			table.GameSetupDraws.DrawRank,
+		).VALUES(gameID, d.Round, d.PickNo, acc, d.Letter, d.Blank, d.Rank)
+		if _, err := di.ExecContext(ctx, tx); err != nil {
+			return fmt.Errorf("insert setup draw round %d pick %d: %w", d.Round, d.PickNo, err)
+		}
+	}
+	return nil
+}
+
 // openMatchKey hashes an auto-match bucket (variant + per-turn word rule) into the
 // advisory-lock key that serialises concurrent enqueues for that bucket, so two
 // players never both open a game instead of pairing.
@@ -166,46 +215,42 @@ func openMatchKey(variant string, multipleWords bool) int64 {
 }
 
 // OpenOrJoin atomically resolves an auto-match enqueue for accountID into the game it
-// lands in: it re-uses the caller's own still-open game (joined=false, created=false,
-// a re-enqueue is idempotent), joins another player's waiting open game and flips it
-// active (joined=true), or opens a fresh game seating the caller with an empty
-// opponent seat (created=true). ins supplies the new game's immutable fields and is
-// used only when a game is created. A transaction-scoped advisory lock on the
-// (variant, rule) bucket serialises concurrent enqueues so two callers pair rather
-// than each opening a game. seats is the two-seat arrangement (the caller and uuid.Nil
-// for the still-empty opponent, in the chosen order) used only when a game is created.
-func (s *Store) OpenOrJoin(ctx context.Context, accountID uuid.UUID, ins gameInsert, seats []uuid.UUID) (gameID uuid.UUID, joined, created bool, err error) {
+// lands in: it joins another player's waiting open game and flips it active
+// (joined=true), or opens a fresh game seating the caller with an empty opponent seat
+// (created=true). A re-enqueue while the caller already has an open game in the bucket
+// opens another fresh game (or joins a different player's) rather than returning the
+// caller's own, so tapping "random opponent" again always starts a new search. ins
+// supplies the new game's immutable fields and is used only when a game is created. A
+// transaction-scoped advisory lock on the (variant, rule) bucket serialises concurrent
+// enqueues so two callers pair rather than each opening a game. seats is the two-seat
+// arrangement (the caller and uuid.Nil for the still-empty opponent, in the chosen
+// order) used only when a game is created; callerName is the caller's display-name
+// snapshot, stamped on their seat whether they open a fresh game or fill another
+// player's open one. seats and draws (the first-move draw recorded against the synthetic
+// opponent, docs/ARCHITECTURE.md §6) are used only when a game is created.
+func (s *Store) OpenOrJoin(ctx context.Context, accountID uuid.UUID, callerName string, ins gameInsert, seats []seatInsert, exclude []uuid.UUID, draws []SetupDraw) (gameID uuid.UUID, joined, created bool, err error) {
 	err = withTx(ctx, s.db, func(tx *sql.Tx) error {
 		if _, e := tx.ExecContext(ctx, `SELECT pg_advisory_xact_lock($1)`,
 			openMatchKey(ins.variant, ins.multipleWordsPerTurn)); e != nil {
 			return fmt.Errorf("open match lock: %w", e)
 		}
-		// 1. The caller's own still-open game for this bucket — a re-enqueue is idempotent.
-		var own uuid.UUID
-		switch e := tx.QueryRowContext(ctx,
-			`SELECT g.game_id FROM backend.games g
-			   JOIN backend.game_players p ON p.game_id = g.game_id
-			  WHERE g.status = 'open' AND g.variant = $1 AND g.multiple_words_per_turn = $2 AND p.account_id = $3
-			  LIMIT 1`,
-			ins.variant, ins.multipleWordsPerTurn, accountID).Scan(&own); {
-		case e == nil:
-			gameID = own
-			return nil
-		case !errors.Is(e, sql.ErrNoRows):
-			return fmt.Errorf("find own open game: %w", e)
-		}
-		// 2. Another player's open game waiting for an opponent — fill its seat and start it.
+		// 1. Another player's open game waiting for an opponent — fill its seat and start it.
+		// A game whose waiting player is in exclude (the caller's per-user block set, either
+		// direction) is skipped, so a block keeps the pair out of the same anonymous game;
+		// an empty exclude (the "{}" literal) excludes nothing.
 		var other uuid.UUID
 		switch e := tx.QueryRowContext(ctx,
 			`SELECT g.game_id FROM backend.games g
 			  WHERE g.status = 'open' AND g.variant = $1 AND g.multiple_words_per_turn = $2
 			    AND NOT EXISTS (SELECT 1 FROM backend.game_players p
 			                     WHERE p.game_id = g.game_id AND p.account_id = $3)
+			    AND NOT EXISTS (SELECT 1 FROM backend.game_players b
+			                     WHERE b.game_id = g.game_id AND b.account_id = ANY($4::uuid[]))
 			  ORDER BY g.created_at
 			  LIMIT 1 FOR UPDATE SKIP LOCKED`,
-			ins.variant, ins.multipleWordsPerTurn, accountID).Scan(&other); {
+			ins.variant, ins.multipleWordsPerTurn, accountID, uuidArrayLiteral(exclude)).Scan(&other); {
 		case e == nil:
-			if er := fillOpenSeat(ctx, tx, other, accountID); er != nil {
+			if er := fillAndActivate(ctx, tx, other, accountID, callerName); er != nil {
 				return er
 			}
 			gameID, joined = other, true
@@ -213,20 +258,26 @@ func (s *Store) OpenOrJoin(ctx context.Context, accountID uuid.UUID, ins gameIns
 		case !errors.Is(e, sql.ErrNoRows):
 			return fmt.Errorf("find open game: %w", e)
 		}
-		// 3. None waiting — open a fresh game seating the caller (the other seat empty).
+		// 2. None waiting — open a fresh game seating the caller (the other seat empty) and
+		// recording the first-move draw; the synthetic opponent's rows carry a NULL account
+		// until a real opponent joins and back-fills them.
 		if e := insertGameTx(ctx, tx, ins, seats); e != nil {
 			return e
 		}
+		if e := insertSetupDrawsTx(ctx, tx, ins.id, draws); e != nil {
+			return e
+		}
 		gameID, created = ins.id, true
 		return nil
 	})
 	return gameID, joined, created, err
 }
 
-// AttachRobot fills the empty opponent seat of open game gameID with robotID and
-// flips it to active, returning whether it attached. It is a no-op (false) when the
-// game is no longer open — a human joined first — so the reaper never double-fills.
-func (s *Store) AttachRobot(ctx context.Context, gameID, robotID uuid.UUID) (bool, error) {
+// AttachRobot fills the empty opponent seat of open game gameID with robotID, stamping
+// displayName (the robot's per-game name) on the seat, and flips it to active, returning
+// whether it attached. It is a no-op (false) when the game is no longer open — a human
+// joined first — so the reaper never double-fills.
+func (s *Store) AttachRobot(ctx context.Context, gameID, robotID uuid.UUID, displayName string) (bool, error) {
 	attached := false
 	err := withTx(ctx, s.db, func(tx *sql.Tx) error {
 		var status string
@@ -240,7 +291,7 @@ func (s *Store) AttachRobot(ctx context.Context, gameID, robotID uuid.UUID) (boo
 		if status != StatusOpen {
 			return nil
 		}
-		if e := fillOpenSeat(ctx, tx, gameID, robotID); e != nil {
+		if e := fillAndActivate(ctx, tx, gameID, robotID, displayName); e != nil {
 			return e
 		}
 		attached = true
@@ -249,14 +300,23 @@ func (s *Store) AttachRobot(ctx context.Context, gameID, robotID uuid.UUID) (boo
 	return attached, err
 }
 
-// fillOpenSeat seats accountID in an open game's empty opponent seat and flips the
-// game to active, stamping a fresh turn clock. The caller holds the game row.
-func fillOpenSeat(ctx context.Context, tx *sql.Tx, gameID, accountID uuid.UUID) error {
+// fillAndActivate seats accountID in an open game's empty opponent seat — stamping
+// displayName as the seat's snapshot — back-fills the first-move draw rows the open game
+// recorded for the then-unknown opponent (docs/ARCHITECTURE.md §6), and flips the game to
+// active with a fresh turn clock. The seat the joiner takes was already fixed by the draw at
+// open time, so the journal (any opening move the starter made while waiting) is never
+// disturbed. The caller holds the game row.
+func fillAndActivate(ctx context.Context, tx *sql.Tx, gameID, accountID uuid.UUID, displayName string) error {
 	if _, err := tx.ExecContext(ctx,
-		`UPDATE backend.game_players SET account_id = $2 WHERE game_id = $1 AND account_id IS NULL`,
-		gameID, accountID); err != nil {
+		`UPDATE backend.game_players SET account_id = $2, display_name = $3 WHERE game_id = $1 AND account_id IS NULL`,
+		gameID, accountID, displayName); err != nil {
 		return fmt.Errorf("fill opponent seat: %w", err)
 	}
+	if _, err := tx.ExecContext(ctx,
+		`UPDATE backend.game_setup_draws SET account_id = $2 WHERE game_id = $1 AND account_id IS NULL`,
+		gameID, accountID); err != nil {
+		return fmt.Errorf("back-fill opponent draws: %w", err)
+	}
 	if _, err := tx.ExecContext(ctx,
 		`UPDATE backend.games SET status = 'active', open_deadline_at = NULL, turn_started_at = now(), updated_at = now()
 		  WHERE game_id = $1`, gameID); err != nil {
@@ -295,27 +355,33 @@ func (s *Store) ExpiredOpen(ctx context.Context, now time.Time) ([]OpenGame, err
 // GetGame loads the games row joined with its seats (ordered by seat), or
 // ErrNotFound.
 func (s *Store) GetGame(ctx context.Context, id uuid.UUID) (Game, error) {
-	gstmt := postgres.SELECT(table.Games.AllColumns).
-		FROM(table.Games).
+	// One round-trip: the game joined with its seats. A LEFT JOIN keeps a (would-be)
+	// seatless game returning the game with no seats, exactly as the prior two-query
+	// version did; ORDER BY seat preserves seat order. The games columns repeat per seat
+	// row — cheap at 2-4 seats, and one round-trip instead of two, which matters because
+	// GetGame is the universal "load the game" step on every game operation.
+	stmt := postgres.SELECT(table.Games.AllColumns, table.GamePlayers.AllColumns).
+		FROM(table.Games.LEFT_JOIN(table.GamePlayers, table.GamePlayers.GameID.EQ(table.Games.GameID))).
 		WHERE(table.Games.GameID.EQ(postgres.UUID(id))).
-		LIMIT(1)
-	var grow model.Games
-	if err := gstmt.QueryContext(ctx, s.db, &grow); err != nil {
-		if errors.Is(err, qrm.ErrNoRows) {
-			return Game{}, ErrNotFound
-		}
+		ORDER_BY(table.GamePlayers.Seat.ASC())
+	var rows []struct {
+		model.Games
+		model.GamePlayers
+	}
+	if err := stmt.QueryContext(ctx, s.db, &rows); err != nil {
 		return Game{}, fmt.Errorf("game: get %s: %w", id, err)
 	}
-
-	sstmt := postgres.SELECT(table.GamePlayers.AllColumns).
-		FROM(table.GamePlayers).
-		WHERE(table.GamePlayers.GameID.EQ(postgres.UUID(id))).
-		ORDER_BY(table.GamePlayers.Seat.ASC())
-	var srows []model.GamePlayers
-	if err := sstmt.QueryContext(ctx, s.db, &srows); err != nil {
-		return Game{}, fmt.Errorf("game: get seats %s: %w", id, err)
+	if len(rows) == 0 {
+		return Game{}, ErrNotFound
 	}
-	return projectGame(grow, srows)
+	seats := make([]model.GamePlayers, 0, len(rows))
+	for i := range rows {
+		// Skip the phantom all-NULL seat row a LEFT JOIN yields for a seatless game.
+		if rows[i].GamePlayers.GameID == id {
+			seats = append(seats, rows[i].GamePlayers)
+		}
+	}
+	return projectGame(rows[0].Games, seats)
 }
 
 // GetGameVariant reads just a game's variant — a cheap single-column lookup the edge uses
@@ -435,6 +501,28 @@ func (s *Store) ListGamesForAccount(ctx context.Context, accountID uuid.UUID) ([
 	return out, nil
 }
 
+// CountActiveQuickGames counts the account's in-progress quick games — the ones the
+// simultaneous-game limit (MaxActiveQuickGames) is checked against. It includes both
+// active and still-open (awaiting-opponent) games, the honest-AI ones among them, and
+// excludes friend games (those linked to a game_invitations row) and finished games.
+// A hidden game still occupies a slot, so this is a dedicated count rather than a
+// filter over ListGamesForAccount (which drops hidden games). Joining on the account's
+// own seat counts each game once (an open game's empty opponent seat has no account).
+func (s *Store) CountActiveQuickGames(ctx context.Context, accountID uuid.UUID) (int, error) {
+	// The status literals are game.StatusActive / game.StatusOpen, matching the
+	// games.status CHECK in the baseline migration.
+	const q = `
+SELECT COUNT(*) FROM backend.games g
+JOIN backend.game_players gp ON gp.game_id = g.game_id
+LEFT JOIN backend.game_invitations gi ON gi.game_id = g.game_id
+WHERE gp.account_id = $1 AND g.status IN ('active', 'open') AND gi.game_id IS NULL`
+	var n int
+	if err := s.db.QueryRowContext(ctx, q, accountID).Scan(&n); err != nil {
+		return 0, fmt.Errorf("game: count active quick games: %w", err)
+	}
+	return n, nil
+}
+
 // HideGame hides a game from the account's own lobby list (idempotent). The caller validates the
 // game is finished and the account is a player.
 func (s *Store) HideGame(ctx context.Context, accountID, gameID uuid.UUID) error {
@@ -546,6 +634,37 @@ func (s *Store) GetJournal(ctx context.Context, id uuid.UUID) ([]HistoryMove, er
 	return out, nil
 }
 
+// SetupDraws loads the ordered first-move seeding draws for a game (round then pick
+// order), or an empty slice for a game created before the draw was recorded. It
+// backs the admin console's first-move section.
+func (s *Store) SetupDraws(ctx context.Context, id uuid.UUID) ([]SetupDraw, error) {
+	stmt := postgres.SELECT(table.GameSetupDraws.AllColumns).
+		FROM(table.GameSetupDraws).
+		WHERE(table.GameSetupDraws.GameID.EQ(postgres.UUID(id))).
+		ORDER_BY(table.GameSetupDraws.Round.ASC(), table.GameSetupDraws.PickNo.ASC())
+	var rows []model.GameSetupDraws
+	if err := stmt.QueryContext(ctx, s.db, &rows); err != nil {
+		return nil, fmt.Errorf("game: get setup draws %s: %w", id, err)
+	}
+	out := make([]SetupDraw, len(rows))
+	for i, r := range rows {
+		// A NULL account is the synthetic opponent of an auto-match draw not yet back-filled.
+		acc := uuid.Nil
+		if r.AccountID != nil {
+			acc = *r.AccountID
+		}
+		out[i] = SetupDraw{
+			Round:   int(r.Round),
+			PickNo:  int(r.PickNo),
+			Account: acc,
+			Letter:  r.Letter,
+			Blank:   r.IsBlank,
+			Rank:    int(r.DrawRank),
+		}
+	}
+	return out, nil
+}
+
 // CommitMove appends the move and applies the post-move game state — the turn
 // cursor and per-seat scores, plus the finish stamp and statistics when the move
 // ended the game — in one transaction.
@@ -596,6 +715,9 @@ func (s *Store) CommitMove(ctx context.Context, c commit) error {
 				if err := upsertStats(ctx, tx, d, c.now); err != nil {
 					return err
 				}
+				if err := upsertBestMove(ctx, tx, d, c.now); err != nil {
+					return err
+				}
 			}
 		}
 		return nil
@@ -625,6 +747,9 @@ func (s *Store) VoidGame(ctx context.Context, v voidCommit) error {
 			if err := upsertStats(ctx, tx, d, v.now); err != nil {
 				return err
 			}
+			if err := upsertBestMove(ctx, tx, d, v.now); err != nil {
+				return err
+			}
 		}
 		return nil
 	})
@@ -677,13 +802,17 @@ func upsertStats(ctx context.Context, tx *sql.Tx, d statDelta, now time.Time) er
 	draws := row.Draws + int32(d.draws)
 	maxGame := max(row.MaxGamePoints, int32(d.gamePoints))
 	maxWord := max(row.MaxWordPoints, int32(d.wordPoints))
+	moves := row.Moves + int32(d.moves)
+	hintsUsed := row.HintsUsed + int32(d.hintsUsed)
 
 	upd := table.AccountStats.UPDATE(
 		table.AccountStats.Wins, table.AccountStats.Losses, table.AccountStats.Draws,
 		table.AccountStats.MaxGamePoints, table.AccountStats.MaxWordPoints, table.AccountStats.UpdatedAt,
+		table.AccountStats.Moves, table.AccountStats.HintsUsed,
 	).SET(
 		postgres.Int(int64(wins)), postgres.Int(int64(losses)), postgres.Int(int64(draws)),
 		postgres.Int(int64(maxGame)), postgres.Int(int64(maxWord)), postgres.TimestampzT(now),
+		postgres.Int(int64(moves)), postgres.Int(int64(hintsUsed)),
 	).WHERE(table.AccountStats.AccountID.EQ(postgres.UUID(d.accountID)))
 	if _, err := upd.ExecContext(ctx, tx); err != nil {
 		return fmt.Errorf("update stats %s: %w", d.accountID, err)
@@ -691,8 +820,41 @@ func upsertStats(ctx context.Context, tx *sql.Tx, d statDelta, now time.Time) er
 	return nil
 }
 
-// SpendHintAllowance increments a seat's per-game hint counter by one.
-func (s *Store) SpendHintAllowance(ctx context.Context, gameID uuid.UUID, seat int) error {
+// upsertBestMove records the account's best play for a variant, keeping only the
+// highest-scoring one: a first play inserts, a later one replaces it only when it scored
+// strictly higher (the conditional DO UPDATE makes the upsert atomic under concurrent
+// finishes without a separate lock). It is a no-op when the finish carries no scoring play
+// for the account (a draw with no plays, or an exchange/pass-only game).
+func upsertBestMove(ctx context.Context, tx *sql.Tx, d statDelta, now time.Time) error {
+	if d.bestVariant == "" || len(d.bestTiles) == 0 {
+		return nil
+	}
+	tiles, err := json.Marshal(d.bestTiles)
+	if err != nil {
+		return fmt.Errorf("marshal best move %s/%s: %w", d.accountID, d.bestVariant, err)
+	}
+	stmt := table.AccountBestMove.
+		INSERT(
+			table.AccountBestMove.AccountID, table.AccountBestMove.Variant,
+			table.AccountBestMove.Score, table.AccountBestMove.Tiles, table.AccountBestMove.UpdatedAt,
+		).
+		VALUES(d.accountID, d.bestVariant, d.bestScore, string(tiles), postgres.TimestampzT(now)).
+		ON_CONFLICT(table.AccountBestMove.AccountID, table.AccountBestMove.Variant).
+		DO_UPDATE(postgres.SET(
+			table.AccountBestMove.Score.SET(table.AccountBestMove.EXCLUDED.Score),
+			table.AccountBestMove.Tiles.SET(table.AccountBestMove.EXCLUDED.Tiles),
+			table.AccountBestMove.UpdatedAt.SET(table.AccountBestMove.EXCLUDED.UpdatedAt),
+		).WHERE(table.AccountBestMove.EXCLUDED.Score.GT(table.AccountBestMove.Score)))
+	if _, err := stmt.ExecContext(ctx, tx); err != nil {
+		return fmt.Errorf("upsert best move %s/%s: %w", d.accountID, d.bestVariant, err)
+	}
+	return nil
+}
+
+// IncHintsUsed increments a seat's per-game hints-used counter by one. It is called for
+// every hint — both the free per-game allowance and the wallet-charged ones — so the counter
+// is the seat's total hints used this game (the first HintsPerPlayer being the allowance).
+func (s *Store) IncHintsUsed(ctx context.Context, gameID uuid.UUID, seat int) error {
 	stmt := table.GamePlayers.
 		UPDATE(table.GamePlayers.HintsUsed).
 		SET(table.GamePlayers.HintsUsed.ADD(postgres.Int(1))).
@@ -701,7 +863,7 @@ func (s *Store) SpendHintAllowance(ctx context.Context, gameID uuid.UUID, seat i
 				AND(table.GamePlayers.Seat.EQ(postgres.Int(int64(seat)))),
 		)
 	if _, err := stmt.ExecContext(ctx, s.db); err != nil {
-		return fmt.Errorf("game: spend hint allowance: %w", err)
+		return fmt.Errorf("game: increment hints used: %w", err)
 	}
 	return nil
 }
@@ -916,7 +1078,7 @@ func (s *Store) RobotTurns(ctx context.Context, ids []uuid.UUID) ([]RobotTurn, e
 	}
 	stmt := postgres.SELECT(
 		table.Games.GameID, table.Games.ToMove, table.Games.TurnStartedAt,
-		table.Games.MoveCount, table.Games.Seed,
+		table.Games.MoveCount, table.Games.Seed, table.Games.VsAi,
 		table.GamePlayers.Seat, table.GamePlayers.AccountID,
 	).FROM(
 		table.Games.INNER_JOIN(table.GamePlayers, table.GamePlayers.GameID.EQ(table.Games.GameID)),
@@ -934,24 +1096,163 @@ func (s *Store) RobotTurns(ctx context.Context, ids []uuid.UUID) ([]RobotTurn, e
 	}
 	out := make([]RobotTurn, 0, len(rows))
 	for _, r := range rows {
-		// The filter matches only the robot's (non-null) seat, so AccountID is set.
-		robotID := uuid.Nil
-		if r.GamePlayers.AccountID != nil {
-			robotID = *r.GamePlayers.AccountID
-		}
-		out = append(out, RobotTurn{
-			GameID:        r.Games.GameID,
-			RobotID:       robotID,
-			RobotSeat:     int(r.GamePlayers.Seat),
-			ToMove:        int(r.Games.ToMove),
-			TurnStartedAt: r.Games.TurnStartedAt,
-			MoveCount:     int(r.Games.MoveCount),
-			Seed:          r.Games.Seed,
-		})
+		out = append(out, robotTurnFrom(r.Games, r.GamePlayers))
+	}
+	if err := s.fillEndgamePass(ctx, out); err != nil {
+		return nil, err
 	}
 	return out, nil
 }
 
+// RobotTurnByGame returns the robot turn for a single active game — the seat held by
+// one of ids (the robot pool) — and true, or false when the game is not active, holds
+// no pooled robot, or is gone. It backs the honest-AI after-commit trigger, which
+// drives one game at once rather than scanning the whole pool (RobotTurns). It leaves
+// EndgamePass false: honest-AI games move at once, so the endgame think-time shrink is a
+// human-mimicry concern computed only on the RobotTurns scan.
+func (s *Store) RobotTurnByGame(ctx context.Context, gameID uuid.UUID, ids []uuid.UUID) (RobotTurn, bool, error) {
+	if len(ids) == 0 {
+		return RobotTurn{}, false, nil
+	}
+	exprs := make([]postgres.Expression, len(ids))
+	for i, id := range ids {
+		exprs[i] = postgres.UUID(id)
+	}
+	stmt := postgres.SELECT(
+		table.Games.GameID, table.Games.ToMove, table.Games.TurnStartedAt,
+		table.Games.MoveCount, table.Games.Seed, table.Games.VsAi,
+		table.GamePlayers.Seat, table.GamePlayers.AccountID,
+	).FROM(
+		table.Games.INNER_JOIN(table.GamePlayers, table.GamePlayers.GameID.EQ(table.Games.GameID)),
+	).WHERE(
+		table.Games.GameID.EQ(postgres.UUID(gameID)).
+			AND(table.Games.Status.EQ(postgres.String(StatusActive))).
+			AND(table.GamePlayers.AccountID.IN(exprs...)),
+	).LIMIT(1)
+
+	var rows []struct {
+		model.Games
+		model.GamePlayers
+	}
+	if err := stmt.QueryContext(ctx, s.db, &rows); err != nil {
+		return RobotTurn{}, false, fmt.Errorf("game: robot turn by game: %w", err)
+	}
+	if len(rows) == 0 {
+		return RobotTurn{}, false, nil
+	}
+	return robotTurnFrom(rows[0].Games, rows[0].GamePlayers), true, nil
+}
+
+// robotTurnFrom projects a games row joined with the robot's seat into a RobotTurn.
+// The query matches only the robot's (non-null) seat, so AccountID is set.
+func robotTurnFrom(g model.Games, p model.GamePlayers) RobotTurn {
+	robotID := uuid.Nil
+	if p.AccountID != nil {
+		robotID = *p.AccountID
+	}
+	return RobotTurn{
+		GameID:        g.GameID,
+		RobotID:       robotID,
+		RobotSeat:     int(p.Seat),
+		ToMove:        int(g.ToMove),
+		TurnStartedAt: g.TurnStartedAt,
+		MoveCount:     int(g.MoveCount),
+		Seed:          g.Seed,
+		VsAI:          g.VsAi,
+	}
+}
+
+// fillEndgamePass marks the turns whose game is a dead-drawn endgame — its two most
+// recent committed moves are both passes, so the board and racks are frozen and the
+// seated robot is bound to pass again — setting EndgamePass and OppLastMove from the
+// move journal so the driver can shorten the robot's think time. Turns whose game is
+// not in that state are left unchanged. A nil or empty slice is a no-op. It runs one
+// batched journal query for the whole scan, so it adds no per-game round trip.
+func (s *Store) fillEndgamePass(ctx context.Context, turns []RobotTurn) error {
+	if len(turns) == 0 {
+		return nil
+	}
+	ids := make([]uuid.UUID, len(turns))
+	for i := range turns {
+		ids[i] = turns[i].GameID
+	}
+	info, err := s.endgamePassInfo(ctx, ids)
+	if err != nil {
+		return err
+	}
+	for i := range turns {
+		if d, ok := info[turns[i].GameID]; ok {
+			turns[i].EndgamePass = true
+			turns[i].OppLastMove = d
+		}
+	}
+	return nil
+}
+
+// endgamePassInfo returns, for each of ids whose two most recent committed moves are
+// both passes, the human's think time on the most recent of them (the gap between the
+// last two journal entries' created_at). Games with fewer than two moves, or whose last
+// two are not both passes, are absent from the map. It reads the move journal only — no
+// schema change — mirroring the analytics.go duration reports. A negative gap (clock
+// skew) is floored to zero.
+func (s *Store) endgamePassInfo(ctx context.Context, ids []uuid.UUID) (map[uuid.UUID]time.Duration, error) {
+	if len(ids) == 0 {
+		return map[uuid.UUID]time.Duration{}, nil
+	}
+	const q = `
+SELECT q.game_id, q.secs FROM (
+  SELECT t.game_id,
+         bool_and(t.action = 'pass') AS both_pass,
+         COUNT(*) AS n,
+         EXTRACT(EPOCH FROM (MAX(t.created_at) - MIN(t.created_at))) AS secs
+  FROM (
+    SELECT m.game_id, m.action, m.created_at,
+           ROW_NUMBER() OVER (PARTITION BY m.game_id ORDER BY m.seq DESC) AS rn
+    FROM backend.game_moves m
+    WHERE m.game_id = ANY($1::uuid[])
+  ) t
+  WHERE t.rn <= 2
+  GROUP BY t.game_id
+) q
+WHERE q.n = 2 AND q.both_pass`
+	rows, err := s.db.QueryContext(ctx, q, uuidArrayLiteral(ids))
+	if err != nil {
+		return nil, fmt.Errorf("game: endgame pass info: %w", err)
+	}
+	defer rows.Close()
+	out := make(map[uuid.UUID]time.Duration, len(ids))
+	for rows.Next() {
+		var id uuid.UUID
+		var secs float64
+		if err := rows.Scan(&id, &secs); err != nil {
+			return nil, fmt.Errorf("game: scan endgame pass info: %w", err)
+		}
+		if secs < 0 {
+			secs = 0
+		}
+		out[id] = time.Duration(secs * float64(time.Second))
+	}
+	return out, rows.Err()
+}
+
+// GameVsAI reports whether a game is an honest-AI game (games.vs_ai) — a cheap
+// single-column read for the social chat/nudge gate, which must reject both in an
+// AI game even though it reports status 'active'. ErrNotFound when the game is gone.
+func (s *Store) GameVsAI(ctx context.Context, id uuid.UUID) (bool, error) {
+	stmt := postgres.SELECT(table.Games.VsAi).
+		FROM(table.Games).
+		WHERE(table.Games.GameID.EQ(postgres.UUID(id))).
+		LIMIT(1)
+	var row model.Games
+	if err := stmt.QueryContext(ctx, s.db, &row); err != nil {
+		if errors.Is(err, qrm.ErrNoRows) {
+			return false, ErrNotFound
+		}
+		return false, fmt.Errorf("game: get vs_ai %s: %w", id, err)
+	}
+	return row.VsAi, nil
+}
+
 // GameSeed returns the bag seed a game was dealt from, used to replay it. The
 // seed is server-only state and never travels in the public Game view.
 func (s *Store) GameSeed(ctx context.Context, id uuid.UUID) (int64, error) {
@@ -1046,6 +1347,7 @@ func projectGame(g model.Games, seats []model.GamePlayers) (Game, error) {
 		UpdatedAt:      g.UpdatedAt,
 	}
 	out.MultipleWordsPerTurn = g.MultipleWordsPerTurn
+	out.VsAI = g.VsAi
 	if g.EndReason != nil {
 		out.EndReason = *g.EndReason
 	}
@@ -1062,11 +1364,12 @@ func projectGame(g model.Games, seats []model.GamePlayers) (Game, error) {
 			accountID = *p.AccountID
 		}
 		out.Seats = append(out.Seats, Seat{
-			Seat:      int(p.Seat),
-			AccountID: accountID,
-			Score:     int(p.Score),
-			HintsUsed: int(p.HintsUsed),
-			IsWinner:  p.IsWinner,
+			Seat:        int(p.Seat),
+			AccountID:   accountID,
+			Score:       int(p.Score),
+			HintsUsed:   int(p.HintsUsed),
+			IsWinner:    p.IsWinner,
+			DisplayName: p.DisplayName,
 		})
 	}
 	return out, nil

backend/internal/game/types.go

@@ -65,6 +65,9 @@ var (
 	ErrNoHintsLeft = errors.New("game: no hints remaining")
 	// ErrNoHintAvailable is returned when the player has no legal play to reveal.
 	ErrNoHintAvailable = errors.New("game: no legal move to suggest")
+	// ErrGameLimitReached is returned when an account already holds MaxActiveQuickGames
+	// simultaneous quick games and tries to create another game (quick or by invitation).
+	ErrGameLimitReached = errors.New("game: simultaneous game limit reached")
 )
 
 // AllowedTurnTimeouts is the set of per-game move clocks a game may be created
@@ -79,8 +82,30 @@ var AllowedTurnTimeouts = []time.Duration{
 // zero (the owner's default: a full day).
 const DefaultTurnTimeout = 24 * time.Hour
 
+// AIInactivityTimeout is the move clock for an honest-AI game (CreateParams.VsAI).
+// These games have no short per-move timeout; instead the player loses a game they
+// abandon after seven days of inactivity. Because the robot moves immediately, only
+// the human is ever on the clock, so the per-turn timeout doubles as the abandon
+// rule (the sweeper resigns the overdue seat). It is set programmatically and is not
+// one of AllowedTurnTimeouts (never offered in the creation UI).
+const AIInactivityTimeout = 7 * 24 * time.Hour
+
+// MaxActiveQuickGames is the cap on a player's simultaneous quick games (human
+// auto-match and honest-AI), counting both in-progress (StatusActive) and
+// still-open, awaiting-opponent (StatusOpen) games. Friend games created by
+// invitation are not counted. At the cap the backend refuses to create a new game
+// of any kind — quick or by invitation — and the lobby disables "New Game";
+// accepting an incoming invitation is always allowed. See
+// Store.CountActiveQuickGames.
+const MaxActiveQuickGames = 10
+
+// aiPlayerName labels the robot seat in an honest-AI game's GCG export, so a downloaded
+// game file shows a clean "AI" rather than the robot's human-like pool name (the in-app
+// UI shows 🤖 from the game's vs_ai flag).
+const aiPlayerName = "AI"
+
 // CreateParams describes a new game. Seats lists the seated accounts in turn
-// order (seat 0 moves first); lobby/matchmaking assembles it in a later stage.
+// order (seat 0 moves first); lobby/matchmaking assembles it.
 type CreateParams struct {
 	Variant        engine.Variant
 	Seats          []uuid.UUID
@@ -92,6 +117,10 @@ type CreateParams struct {
 	// MultipleWordsPerTurn true selects standard Scrabble; false the single-word rule —
 	// only the main word is validated and scored. Russian games default to false.
 	MultipleWordsPerTurn bool
+	// VsAI creates an honest-AI game against a pooled robot (see games.vs_ai): the
+	// robot is seated at once, the move clock is AIInactivityTimeout, and chat/nudge
+	// and finish-time statistics are suppressed. Set by the lobby's AI-match path.
+	VsAI bool
 }
 
 // Game is the persisted state of a match: the games row joined with its seats.
@@ -115,6 +144,9 @@ type Game struct {
 	FinishedAt     *time.Time
 	// MultipleWordsPerTurn true selects standard Scrabble; false the single-word rule.
 	MultipleWordsPerTurn bool
+	// VsAI is true for an honest-AI game (games.vs_ai): the opponent is a robot the
+	// player knowingly chose, shown as 🤖, with chat/nudge disabled and no statistics.
+	VsAI bool
 }
 
 // Seat is one player's standing in a game.
@@ -122,8 +154,15 @@ type Seat struct {
 	Seat      int
 	AccountID uuid.UUID
 	Score     int
+	// HintsUsed is the total hints the seat used this game — both the free per-game allowance
+	// and the wallet-charged ones (the first HintsPerPlayer being the allowance).
 	HintsUsed int
 	IsWinner  bool
+	// DisplayName is the seat's display-name snapshot, captured when the seat was taken
+	// (the human's then-current name, or a disguised robot's per-game name). Empty for a
+	// still-empty open seat or a pre-snapshot legacy row, where readers fall back to the
+	// account's current display name (docs/ARCHITECTURE.md §7).
+	DisplayName string
 }
 
 // OpenGame identifies an auto-match game waiting for an opponent whose robot
@@ -145,6 +184,18 @@ func (g Game) seatOf(accountID uuid.UUID) (int, bool) {
 	return 0, false
 }
 
+// seatedIn reports whether accountID holds a seat in seats. It backs the read-side
+// membership check against the cached, immutable seat list, so a hot read can skip
+// loading the game from the store.
+func seatedIn(seats []Seat, accountID uuid.UUID) bool {
+	for _, s := range seats {
+		if s.AccountID == accountID {
+			return true
+		}
+	}
+	return false
+}
+
 // MoveResult is the outcome of a committed transition: the decoded move and the
 // post-move game, plus the actor's own refilled rack and the bag size after the draw
 // (Rack/BagLen), so the mover renders the next state from the response without a
@@ -157,10 +208,13 @@ type MoveResult struct {
 }
 
 // HintResult is a revealed hint and the requesting player's remaining hint
-// budget (per-seat allowance plus profile wallet) after spending one.
+// budget (per-seat allowance plus profile wallet) after spending one. WalletBalance is
+// the global wallet alone, so the client can keep its live wallet authoritative and
+// re-derive the per-game allowance (HintsRemaining - WalletBalance).
 type HintResult struct {
 	Move           engine.MoveRecord
 	HintsRemaining int
+	WalletBalance  int
 }
 
 // EvalResult previews a tentative play without committing it. Dir is the
@@ -183,6 +237,9 @@ type StateView struct {
 	Rack           []string
 	BagLen         int
 	HintsRemaining int
+	// WalletBalance is the player's global hint-wallet balance alone (HintsRemaining folds
+	// it in with the per-game allowance), so the client keeps the wallet live across games.
+	WalletBalance int
 }
 
 // HistoryMove is one decoded journal row, independent of any dictionary.
@@ -220,6 +277,18 @@ type RobotTurn struct {
 	TurnStartedAt time.Time
 	MoveCount     int
 	Seed          int64
+	// VsAI is true when the game is an honest-AI game: the driver then makes the
+	// robot move immediately, with no sleep window and no proactive nudge.
+	VsAI bool
+	// EndgamePass is true when the two most recent committed moves are both passes, so
+	// the board and racks are frozen and the robot is bound to pass again. The driver
+	// then shortens the robot's think time (see robot.endgamePassDelay) so a decided
+	// game is not dragged out. It is false until at least two moves exist.
+	EndgamePass bool
+	// OppLastMove is the human's think time on the most recent move — the gap between
+	// the last two journal entries — used to scale the shortened endgame think time. It
+	// is meaningful only when EndgamePass is true (zero otherwise).
+	OppLastMove time.Duration
 }
 
 // Complaint is a word-check complaint in the admin review queue. It is filed

backend/internal/inttest/account_test.go

@@ -89,7 +89,8 @@ func TestGetStatsZeroForFreshAccount(t *testing.T) {
 	if err != nil {
 		t.Fatalf("get stats: %v", err)
 	}
-	if (st != account.Stats{}) {
+	zero := st.Wins == 0 && st.Losses == 0 && st.Draws == 0 && st.MaxGamePoints == 0 && st.MaxWordPoints == 0
+	if !zero || len(st.BestMoves) != 0 {
 		t.Fatalf("fresh stats = %+v, want zero", st)
 	}
 }
@@ -109,38 +110,92 @@ func identityConfirmed(t *testing.T, kind, externalID string) bool {
 }
 
 // TestProvisionTelegramSeedsNewAccountOnly checks that Telegram first contact
-// seeds the new account's language and display name from the launch fields,
-// defaults the in-app-only flag on, and never overwrites an existing account on a
-// later login (language seeding).
+// seeds the new account's language, display name and time zone from the launch
+// fields / detected offset, defaults the in-app-only flag on, and never overwrites
+// an existing account on a later login (language and zone seeding).
 func TestProvisionTelegramSeedsNewAccountOnly(t *testing.T) {
 	ctx := context.Background()
 	store := account.NewStore(testDB)
 	ext := "tg-" + uuid.NewString()
 
-	acc, err := store.ProvisionTelegram(ctx, ext, "ru-RU", "thehandle", "Иван")
+	acc, created, err := store.ProvisionTelegram(ctx, ext, "ru-RU", "thehandle", "Иван", "+03:00")
 	if err != nil {
 		t.Fatalf("provision telegram: %v", err)
 	}
+	if !created {
+		t.Error("created = false on first contact, want true")
+	}
 	if acc.PreferredLanguage != "ru" {
 		t.Errorf("PreferredLanguage = %q, want ru", acc.PreferredLanguage)
 	}
 	if acc.DisplayName != "Иван" {
 		t.Errorf("DisplayName = %q, want Иван", acc.DisplayName)
 	}
+	if acc.TimeZone != "+03:00" {
+		t.Errorf("TimeZone = %q, want the seeded +03:00", acc.TimeZone)
+	}
 	if !acc.NotificationsInAppOnly {
 		t.Error("NotificationsInAppOnly should default to true")
 	}
 
 	// A later login with different fields returns the same account, unchanged.
-	again, err := store.ProvisionTelegram(ctx, ext, "en", "other", "Other")
+	again, created, err := store.ProvisionTelegram(ctx, ext, "en", "other", "Other", "+09:00")
 	if err != nil {
 		t.Fatalf("re-provision telegram: %v", err)
 	}
+	if created {
+		t.Error("created = true on a repeat login, want false")
+	}
 	if again.ID != acc.ID {
 		t.Errorf("re-provision id = %s, want %s", again.ID, acc.ID)
 	}
-	if again.PreferredLanguage != "ru" || again.DisplayName != "Иван" {
-		t.Errorf("existing account overwritten: lang=%q name=%q", again.PreferredLanguage, again.DisplayName)
+	if again.PreferredLanguage != "ru" || again.DisplayName != "Иван" || again.TimeZone != "+03:00" {
+		t.Errorf("existing account overwritten: lang=%q name=%q tz=%q", again.PreferredLanguage, again.DisplayName, again.TimeZone)
+	}
+}
+
+// TestProvisionSeedsTimeZone checks the create-time time-zone seed across paths: a
+// valid detected offset is stored verbatim (even "+00:00", which is deliberately
+// distinct from the unset "UTC" default), a guest is seeded the same way, and a
+// missing or malformed offset falls back to the "UTC" column default rather than
+// being guessed at.
+func TestProvisionSeedsTimeZone(t *testing.T) {
+	ctx := context.Background()
+	store := account.NewStore(testDB)
+
+	// A detected zero offset is written as "+00:00" — we record that the zone was
+	// detected (and equals UTC), distinct from the "UTC" default meaning "unknown".
+	utcDetected, _, err := store.ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "en", "", "Zero", "+00:00")
+	if err != nil {
+		t.Fatalf("provision telegram +00:00: %v", err)
+	}
+	if utcDetected.TimeZone != "+00:00" {
+		t.Errorf("TimeZone = %q, want the seeded +00:00", utcDetected.TimeZone)
+	}
+
+	// A malformed offset is dropped: the account keeps the UTC default.
+	bad, _, err := store.ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "en", "", "Bad", "not-a-zone")
+	if err != nil {
+		t.Fatalf("provision telegram bad tz: %v", err)
+	}
+	if bad.TimeZone != "UTC" {
+		t.Errorf("TimeZone = %q, want UTC fallback for a malformed offset", bad.TimeZone)
+	}
+
+	// A guest is seeded its detected offset; an empty one keeps the UTC default.
+	guest, err := store.ProvisionGuest(ctx, "-05:30")
+	if err != nil {
+		t.Fatalf("provision guest: %v", err)
+	}
+	if guest.TimeZone != "-05:30" {
+		t.Errorf("guest TimeZone = %q, want the seeded -05:30", guest.TimeZone)
+	}
+	plainGuest, err := store.ProvisionGuest(ctx, "")
+	if err != nil {
+		t.Fatalf("provision plain guest: %v", err)
+	}
+	if plainGuest.TimeZone != "UTC" {
+		t.Errorf("plain guest TimeZone = %q, want UTC default", plainGuest.TimeZone)
 	}
 }
 
@@ -149,7 +204,7 @@ func TestProvisionTelegramSeedsNewAccountOnly(t *testing.T) {
 // language CHECK.
 func TestProvisionTelegramUnknownLanguageDefaults(t *testing.T) {
 	ctx := context.Background()
-	acc, err := account.NewStore(testDB).ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "fr", "", "")
+	acc, _, err := account.NewStore(testDB).ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "fr", "", "", "")
 	if err != nil {
 		t.Fatalf("provision telegram: %v", err)
 	}
@@ -158,46 +213,6 @@ func TestProvisionTelegramUnknownLanguageDefaults(t *testing.T) {
 	}
 }
 
-// TestServiceLanguageRoundTrip checks SetServiceLanguage persists the push-routing
-// language (the bot a Telegram user last signed in through): a fresh account has
-// none, a set value reads back, a later login overwrites it (last-login-wins), and
-// an empty value is a no-op. The push-target route coalesces it with the preferred
-// language.
-func TestServiceLanguageRoundTrip(t *testing.T) {
-	ctx := context.Background()
-	store := account.NewStore(testDB)
-	acc, err := store.ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "en", "", "Player")
-	if err != nil {
-		t.Fatalf("provision telegram: %v", err)
-	}
-	if acc.ServiceLanguage != "" {
-		t.Errorf("fresh ServiceLanguage = %q, want empty", acc.ServiceLanguage)
-	}
-
-	if err := store.SetServiceLanguage(ctx, acc.ID, "ru"); err != nil {
-		t.Fatalf("set service language: %v", err)
-	}
-	if got, err := store.GetByID(ctx, acc.ID); err != nil {
-		t.Fatalf("get by id: %v", err)
-	} else if got.ServiceLanguage != "ru" {
-		t.Errorf("ServiceLanguage = %q, want ru", got.ServiceLanguage)
-	}
-
-	// A later login through the other bot updates it; a subsequent empty value
-	// (a non-Telegram login) leaves it unchanged.
-	if err := store.SetServiceLanguage(ctx, acc.ID, "en"); err != nil {
-		t.Fatalf("update service language: %v", err)
-	}
-	if err := store.SetServiceLanguage(ctx, acc.ID, ""); err != nil {
-		t.Fatalf("noop service language: %v", err)
-	}
-	if got, err := store.GetByID(ctx, acc.ID); err != nil {
-		t.Fatalf("get by id: %v", err)
-	} else if got.ServiceLanguage != "en" {
-		t.Errorf("ServiceLanguage after update+noop = %q, want en", got.ServiceLanguage)
-	}
-}
-
 // TestHighRateFlagRoundTrip covers the soft high-rate marker: a fresh account
 // is unflagged, FlagHighRate stamps it exactly once (a second sustained episode
 // never moves the timestamp), ClearHighRateFlag reverses it, and a re-flag after
@@ -205,7 +220,7 @@ func TestServiceLanguageRoundTrip(t *testing.T) {
 func TestHighRateFlagRoundTrip(t *testing.T) {
 	ctx := context.Background()
 	store := account.NewStore(testDB)
-	acc, err := store.ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "en", "", "Player")
+	acc, _, err := store.ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "en", "", "Player", "")
 	if err != nil {
 		t.Fatalf("provision telegram: %v", err)
 	}
@@ -261,7 +276,7 @@ func TestIdentityExternalID(t *testing.T) {
 	ctx := context.Background()
 	store := account.NewStore(testDB)
 	ext := "tg-" + uuid.NewString()
-	acc, err := store.ProvisionTelegram(ctx, ext, "en", "", "Tg User")
+	acc, _, err := store.ProvisionTelegram(ctx, ext, "en", "", "Tg User", "")
 	if err != nil {
 		t.Fatalf("provision telegram: %v", err)
 	}
@@ -286,7 +301,7 @@ func TestIdentityExternalID(t *testing.T) {
 func TestNotificationsInAppOnlyRoundTrip(t *testing.T) {
 	ctx := context.Background()
 	store := account.NewStore(testDB)
-	acc, err := store.ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "en", "", "Player")
+	acc, _, err := store.ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "en", "", "Player", "")
 	if err != nil {
 		t.Fatalf("provision telegram: %v", err)
 	}
@@ -298,6 +313,7 @@ func TestNotificationsInAppOnlyRoundTrip(t *testing.T) {
 		PreferredLanguage:      "en",
 		TimeZone:               "UTC",
 		NotificationsInAppOnly: false,
+		VariantPreferences:     []string{"erudit_ru"},
 	})
 	if err != nil {
 		t.Fatalf("update profile: %v", err)

backend/internal/inttest/admin_test.go

@@ -206,6 +206,12 @@ func TestConsoleGameDetailRobotSchedule(t *testing.T) {
 	if !strings.Contains(body, "~40%") {
 		t.Error("robot play-to-win target caption missing")
 	}
+	if !strings.Contains(body, "First-move draw") {
+		t.Error("first-move draw section missing from the game detail")
+	}
+	if !strings.Contains(body, `id="replay-board"`) {
+		t.Error("replay board container missing from the game detail")
+	}
 }
 
 // TestConsoleThrottledViewAndFlagClear drives the rate-limit surface end to
@@ -216,7 +222,7 @@ func TestConsoleGameDetailRobotSchedule(t *testing.T) {
 func TestConsoleThrottledViewAndFlagClear(t *testing.T) {
 	ctx := context.Background()
 	accounts := account.NewStore(testDB)
-	acc, err := accounts.ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "en", "", "Throttled Player")
+	acc, _, err := accounts.ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "en", "", "Throttled Player", "")
 	if err != nil {
 		t.Fatalf("provision: %v", err)
 	}

backend/internal/inttest/ai_game_test.go

@@ -0,0 +1,269 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"errors"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/account"
+	"scrabble/backend/internal/engine"
+	"scrabble/backend/internal/game"
+	"scrabble/backend/internal/notify"
+	"scrabble/backend/internal/robot"
+	"scrabble/backend/internal/social"
+)
+
+// The AI-game suite covers the honest-AI quick game: a game created already seated with a
+// pooled robot (vs_ai), in which the robot moves immediately, the move clock is the 7-day
+// inactivity rule, chat and nudge are disabled and no statistics are recorded.
+
+// startAIGame creates an active vs_ai game seating a fresh human and a pooled robot, the human
+// at seat 0 when humanFirst (otherwise the robot moves first), and returns it with the two ids.
+func startAIGame(t *testing.T, svc *game.Service, robots *robot.Service, humanFirst bool, seed int64) (game.Game, uuid.UUID, uuid.UUID) {
+	t.Helper()
+	ctx := context.Background()
+	human := provisionAccount(t)
+	robotID, err := robots.Pick(engine.VariantEnglish)
+	if err != nil {
+		t.Fatalf("pick robot: %v", err)
+	}
+	seats := []uuid.UUID{human, robotID}
+	if !humanFirst {
+		seats = []uuid.UUID{robotID, human}
+	}
+	g, err := svc.Create(ctx, game.CreateParams{
+		Variant: engine.VariantEnglish, Seats: seats, VsAI: true, Seed: seed,
+		HintsAllowed: true, HintsPerPlayer: 1, MultipleWordsPerTurn: true,
+	})
+	if err != nil {
+		t.Fatalf("create AI game: %v", err)
+	}
+	return g, human, robotID
+}
+
+// TestAIGameStartSeatsRobotActive checks the matchmaker's AI path creates an active game already
+// seated with a robot (no open/wait phase), flagged vs_ai and on the 7-day inactivity clock.
+func TestAIGameStartSeatsRobotActive(t *testing.T) {
+	ctx := context.Background()
+	robots := newRobotService(t, newGameService())
+	if err := robots.EnsurePool(ctx); err != nil {
+		t.Fatalf("ensure pool: %v", err)
+	}
+	mm := newMatchmaker(t, robots, time.Minute, 0)
+
+	human := provisionAccount(t)
+	res, err := mm.StartVsAI(ctx, human, engine.VariantEnglish, true)
+	if err != nil {
+		t.Fatalf("start vs AI: %v", err)
+	}
+	g := res.Game
+	if !res.Matched || g.Status != game.StatusActive {
+		t.Fatalf("AI game = (matched %v, status %q), want (true, active)", res.Matched, g.Status)
+	}
+	if !g.VsAI {
+		t.Error("an AI game must be flagged vs_ai")
+	}
+	if g.TurnTimeout != game.AIInactivityTimeout {
+		t.Errorf("AI game move clock = %s, want %s", g.TurnTimeout, game.AIInactivityTimeout)
+	}
+	var hasHuman, hasRobot bool
+	for _, s := range g.Seats {
+		switch {
+		case s.AccountID == human:
+			hasHuman = true
+		case s.AccountID != uuid.Nil:
+			hasRobot = true
+		}
+	}
+	if len(g.Seats) != 2 || !hasHuman || !hasRobot {
+		t.Errorf("AI game seats = %+v, want exactly the human and a robot (no empty seat)", g.Seats)
+	}
+}
+
+// TestAIRobotMovesImmediately checks the robot in a vs_ai game moves the instant it is its turn,
+// with no sampled delay and no sleep window (the honest-AI fast path the trigger drives).
+func TestAIRobotMovesImmediately(t *testing.T) {
+	ctx := context.Background()
+	svc := newGameService()
+	robots := newRobotService(t, svc)
+	if err := robots.EnsurePool(ctx); err != nil {
+		t.Fatalf("ensure pool: %v", err)
+	}
+	g, _, _ := startAIGame(t, svc, robots, false, openingSeed(t)) // robot at seat 0, to move
+
+	if err := robots.DriveGame(ctx, g.ID, time.Now()); err != nil {
+		t.Fatalf("drive AI game: %v", err)
+	}
+	after, err := svc.GameByID(ctx, g.ID)
+	if err != nil {
+		t.Fatalf("get game: %v", err)
+	}
+	if after.MoveCount != 1 {
+		t.Errorf("after one drive the robot's first move must be in (move count %d, want 1)", after.MoveCount)
+	}
+	if after.ToMove == 0 {
+		t.Error("after the robot's move it must be the human's turn")
+	}
+}
+
+// TestAIGameStatsSkipped checks a vs_ai game records no statistics: a human resign (a loss in a
+// normal game) leaves the human with no stats row.
+func TestAIGameStatsSkipped(t *testing.T) {
+	ctx := context.Background()
+	svc := newGameService()
+	robots := newRobotService(t, svc)
+	if err := robots.EnsurePool(ctx); err != nil {
+		t.Fatalf("ensure pool: %v", err)
+	}
+	g, human, _ := startAIGame(t, svc, robots, true, openingSeed(t))
+
+	if _, err := svc.Resign(ctx, g.ID, human); err != nil {
+		t.Fatalf("resign: %v", err)
+	}
+	if _, _, _, _, _, found := readStats(t, human); found {
+		t.Error("an AI game must not record statistics for the human")
+	}
+}
+
+// TestAIGameSevenDayTimeout checks the reused turn-timeout sweeper enforces the 7-day inactivity
+// rule: nothing fires within seven days, and past it the human on the clock is resigned and loses.
+func TestAIGameSevenDayTimeout(t *testing.T) {
+	ctx := context.Background()
+	svc := newGameService()
+	robots := newRobotService(t, svc)
+	if err := robots.EnsurePool(ctx); err != nil {
+		t.Fatalf("ensure pool: %v", err)
+	}
+	g, human, robotID := startAIGame(t, svc, robots, true, openingSeed(t)) // human at seat 0, to move
+
+	// Six days idle: well under the 7-day clock, so the sweeper leaves it active.
+	setTurnStarted(t, g.ID, time.Now().Add(-6*24*time.Hour))
+	if _, err := svc.SweepTimeouts(ctx, time.Now()); err != nil {
+		t.Fatalf("sweep: %v", err)
+	}
+	if mid, _ := svc.GameByID(ctx, g.ID); mid.Status != game.StatusActive {
+		t.Fatalf("at six days idle the AI game must still be active, got %q", mid.Status)
+	}
+
+	// Eight days idle: past the clock, so the human (on the clock) is timed out and loses.
+	setTurnStarted(t, g.ID, time.Now().Add(-8*24*time.Hour))
+	if _, err := svc.SweepTimeouts(ctx, time.Now()); err != nil {
+		t.Fatalf("sweep: %v", err)
+	}
+	done, err := svc.GameByID(ctx, g.ID)
+	if err != nil {
+		t.Fatalf("get game: %v", err)
+	}
+	if done.Status != game.StatusFinished || done.EndReason != "timeout" {
+		t.Fatalf("after seven days idle: (status %q, reason %q), want (finished, timeout)", done.Status, done.EndReason)
+	}
+	for _, s := range done.Seats {
+		if s.AccountID == robotID && !s.IsWinner {
+			t.Error("the robot must win when the human abandons the game")
+		}
+		if s.AccountID == human && s.IsWinner {
+			t.Error("the abandoning human must not win")
+		}
+	}
+	if _, _, _, _, _, found := readStats(t, human); found {
+		t.Error("a timed-out AI game must not record statistics")
+	}
+}
+
+// TestAIGameSuppressesYourTurn checks an honest-AI game emits opponent_moved but no your_turn:
+// the robot replies instantly, so a "your turn" signal would arrive with the AI's move and be
+// pointless (the human's UI advances from opponent_moved).
+func TestAIGameSuppressesYourTurn(t *testing.T) {
+	ctx := context.Background()
+	svc := newGameService()
+	pub := &capturePublisher{}
+	svc.SetNotifier(pub)
+	robots := newRobotService(t, svc)
+	if err := robots.EnsurePool(ctx); err != nil {
+		t.Fatalf("ensure pool: %v", err)
+	}
+	seed := openingSeed(t)
+	g, human, _ := startAIGame(t, svc, robots, true, seed) // human at seat 0, to move
+
+	hint, ok := newMirror(t, seed, 2).HintView()
+	if !ok || len(hint.Tiles) == 0 {
+		t.Fatal("no opening move for the seed")
+	}
+	if _, err := svc.SubmitPlay(ctx, g.ID, human, hint.Tiles); err != nil {
+		t.Fatalf("human play: %v", err)
+	}
+
+	var opponentMoved, yourTurn int
+	pub.mu.Lock()
+	for _, in := range pub.intents {
+		switch in.Kind {
+		case notify.KindYourTurn:
+			yourTurn++
+		case notify.KindOpponentMoved:
+			opponentMoved++
+		}
+	}
+	pub.mu.Unlock()
+	if yourTurn != 0 {
+		t.Errorf("an AI game must emit no your_turn; got %d", yourTurn)
+	}
+	if opponentMoved == 0 {
+		t.Error("an AI game must still emit opponent_moved so the human's UI advances")
+	}
+}
+
+// TestAIGameGCGLabelsRobotAI checks the GCG export of an honest-AI game labels the robot seat
+// "AI" rather than leaking its human-like pool name.
+func TestAIGameGCGLabelsRobotAI(t *testing.T) {
+	ctx := context.Background()
+	svc := newGameService()
+	robots := newRobotService(t, svc)
+	if err := robots.EnsurePool(ctx); err != nil {
+		t.Fatalf("ensure pool: %v", err)
+	}
+	g, human, robotID := startAIGame(t, svc, robots, true, openingSeed(t))
+	if _, err := svc.Resign(ctx, g.ID, human); err != nil { // finish the game so GCG export is allowed
+		t.Fatalf("resign: %v", err)
+	}
+
+	gcg, err := svc.ExportGCG(ctx, g.ID)
+	if err != nil {
+		t.Fatalf("export gcg: %v", err)
+	}
+	if !strings.Contains(gcg, " AI\n") {
+		t.Errorf("GCG must label the robot seat \"AI\"; got:\n%s", gcg)
+	}
+	robot, err := account.NewStore(testDB).GetByID(ctx, robotID)
+	if err != nil {
+		t.Fatalf("get robot: %v", err)
+	}
+	if strings.Contains(gcg, robot.DisplayName) {
+		t.Errorf("GCG must not leak the robot's pool name %q; got:\n%s", robot.DisplayName, gcg)
+	}
+}
+
+// TestAIGameChatAndNudgeRejected checks chat and nudge are both refused in a vs_ai game (the
+// opponent is a robot), even though the game reports status 'active'.
+func TestAIGameChatAndNudgeRejected(t *testing.T) {
+	ctx := context.Background()
+	svc := newGameService()
+	soc := newSocialService()
+	robots := newRobotService(t, svc)
+	if err := robots.EnsurePool(ctx); err != nil {
+		t.Fatalf("ensure pool: %v", err)
+	}
+	g, human, _ := startAIGame(t, svc, robots, true, openingSeed(t))
+
+	if _, err := soc.PostMessage(ctx, g.ID, human, "hi robot", ""); !errors.Is(err, social.ErrGameVsAI) {
+		t.Errorf("chat in an AI game = %v, want ErrGameVsAI", err)
+	}
+	if _, err := soc.Nudge(ctx, g.ID, human); !errors.Is(err, social.ErrGameVsAI) {
+		t.Errorf("nudge in an AI game = %v, want ErrGameVsAI", err)
+	}
+}

backend/internal/inttest/banner_console_test.go

@@ -0,0 +1,276 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"github.com/google/uuid"
+	"go.uber.org/zap"
+
+	"scrabble/backend/internal/account"
+	"scrabble/backend/internal/ads"
+	"scrabble/backend/internal/server"
+)
+
+// bannerServer assembles a console-capable server with the ads domain wired.
+func bannerServer(t *testing.T) (*server.Server, *ads.Service) {
+	t.Helper()
+	adsSvc := ads.NewService(ads.NewStore(testDB))
+	srv := server.New(":0", server.Deps{
+		Logger:   zap.NewNop(),
+		Accounts: account.NewStore(testDB),
+		Games:    newGameService(),
+		Registry: testRegistry,
+		DictDir:  dictDir(),
+		Ads:      adsSvc,
+	})
+	return srv, adsSvc
+}
+
+// findCampaign returns the id of the campaign with the given name, or fails.
+func findCampaign(t *testing.T, svc *ads.Service, name string) uuid.UUID {
+	t.Helper()
+	all, err := svc.ListCampaigns(context.Background())
+	if err != nil {
+		t.Fatalf("list campaigns: %v", err)
+	}
+	for _, c := range all {
+		if c.Name == name {
+			return c.ID
+		}
+	}
+	t.Fatalf("campaign %q not found", name)
+	return uuid.Nil
+}
+
+// defaultCampaign returns the seeded perpetual default campaign.
+func defaultCampaign(t *testing.T, svc *ads.Service) ads.Campaign {
+	t.Helper()
+	all, err := svc.ListCampaigns(context.Background())
+	if err != nil {
+		t.Fatalf("list campaigns: %v", err)
+	}
+	for _, c := range all {
+		if c.IsDefault {
+			return c
+		}
+	}
+	t.Fatal("no default campaign seeded")
+	return ads.Campaign{}
+}
+
+// TestBannerConsoleCRUD drives the /_gm/banners console over HTTP against real
+// stores: pages render, the CSRF guard bites, validation and the default-campaign
+// protection hold, and a campaign + message round-trips through create/edit/
+// reorder/delete.
+func TestBannerConsoleCRUD(t *testing.T) {
+	ctx := context.Background()
+	srv, adsSvc := bannerServer(t)
+	h := srv.Handler()
+	base := "http://admin.test/_gm"
+	const origin = "http://admin.test"
+
+	// The list renders and shows the seeded default campaign.
+	if code, body := consoleDo(h, http.MethodGet, base+"/banners", "", ""); code != http.StatusOK || !strings.Contains(body, "Default (house)") {
+		t.Fatalf("banners list = %d, has default=%v", code, strings.Contains(body, "Default (house)"))
+	}
+
+	name := "Promo-" + uuid.NewString()[:8]
+	// CSRF: a create without a same-origin header is rejected.
+	if code, _ := consoleDo(h, http.MethodPost, base+"/banners", "name="+name+"&weight=30&enabled=on", ""); code != http.StatusForbidden {
+		t.Fatalf("create without origin = %d, want 403", code)
+	}
+	// Validation: weight out of range is refused.
+	if code, body := consoleDo(h, http.MethodPost, base+"/banners", "name=Bad&weight=0&enabled=on", origin); code != http.StatusOK || !strings.Contains(body, "Not saved") {
+		t.Fatalf("create weight=0 = %d, has 'Not saved'=%v", code, strings.Contains(body, "Not saved"))
+	}
+	// A valid create persists.
+	if code, body := consoleDo(h, http.MethodPost, base+"/banners", "name="+name+"&weight=30&enabled=on", origin); code != http.StatusOK || !strings.Contains(body, "Created") {
+		t.Fatalf("create = %d, has Created=%v", code, strings.Contains(body, "Created"))
+	}
+	id := findCampaign(t, adsSvc, name)
+
+	// The detail page renders.
+	if code, body := consoleDo(h, http.MethodGet, base+"/banners/"+id.String(), "", ""); code != http.StatusOK || !strings.Contains(body, name) {
+		t.Fatalf("detail = %d, has name=%v", code, strings.Contains(body, name))
+	}
+	// A message needs both languages.
+	if code, body := consoleDo(h, http.MethodPost, base+"/banners/"+id.String()+"/messages", "body_en=Hello&body_ru=", origin); code != http.StatusOK || !strings.Contains(body, "Not saved") {
+		t.Fatalf("add half message = %d, has 'Not saved'=%v", code, strings.Contains(body, "Not saved"))
+	}
+	// A bilingual message is added.
+	if code, body := consoleDo(h, http.MethodPost, base+"/banners/"+id.String()+"/messages", "body_en=Hello&body_ru=Привет", origin); code != http.StatusOK || !strings.Contains(body, "Added") {
+		t.Fatalf("add message = %d, has Added=%v", code, strings.Contains(body, "Added"))
+	}
+	cm, err := adsSvc.Campaign(ctx, id)
+	if err != nil || len(cm.Messages) != 1 {
+		t.Fatalf("campaign messages = %d (err %v), want 1", len(cm.Messages), err)
+	}
+	mid := cm.Messages[0].ID
+	// Edit it.
+	if code, _ := consoleDo(h, http.MethodPost, base+"/banners/"+id.String()+"/messages/"+mid.String(), "body_en=Hi&body_ru=Привет!", origin); code != http.StatusOK {
+		t.Fatalf("edit message = %d", code)
+	}
+	if cm, _ := adsSvc.Campaign(ctx, id); cm.Messages[0].BodyEn != "Hi" {
+		t.Fatalf("edit did not persist: %q", cm.Messages[0].BodyEn)
+	}
+	// Reorder is a no-op for a single message but still succeeds.
+	if code, _ := consoleDo(h, http.MethodPost, base+"/banners/"+id.String()+"/messages/"+mid.String()+"/move", "dir=down", origin); code != http.StatusOK {
+		t.Fatalf("move message = %d", code)
+	}
+	// Delete the message, then the campaign.
+	if code, _ := consoleDo(h, http.MethodPost, base+"/banners/"+id.String()+"/messages/"+mid.String()+"/delete", "", origin); code != http.StatusOK {
+		t.Fatalf("delete message = %d", code)
+	}
+	if code, body := consoleDo(h, http.MethodPost, base+"/banners/"+id.String()+"/delete", "", origin); code != http.StatusOK || !strings.Contains(body, "Deleted") {
+		t.Fatalf("delete campaign = %d, has Deleted=%v", code, strings.Contains(body, "Deleted"))
+	}
+	if _, err := adsSvc.Campaign(ctx, id); err == nil {
+		t.Fatal("campaign still present after delete")
+	}
+
+	// The default campaign cannot be deleted.
+	def := defaultCampaign(t, adsSvc)
+	if code, body := consoleDo(h, http.MethodPost, base+"/banners/"+def.ID.String()+"/delete", "", origin); code != http.StatusOK || !strings.Contains(body, "Not saved") {
+		t.Fatalf("delete default = %d, has 'Not saved'=%v", code, strings.Contains(body, "Not saved"))
+	}
+	if _, err := adsSvc.Campaign(ctx, def.ID); err != nil {
+		t.Fatalf("default campaign gone after refused delete: %v", err)
+	}
+}
+
+// TestBannerMessageOwnership guards the campaign/message pairing: a message may
+// only be edited or deleted through the URL of the campaign it belongs to. This
+// closes a default-protection bypass — deleting the default's last message via an
+// unrelated campaign's URL must be refused.
+func TestBannerMessageOwnership(t *testing.T) {
+	ctx := context.Background()
+	srv, adsSvc := bannerServer(t)
+	h := srv.Handler()
+	base := "http://admin.test/_gm"
+	const origin = "http://admin.test"
+
+	def := defaultCampaign(t, adsSvc)
+	if len(def.Messages) == 0 {
+		t.Fatal("default campaign has no seeded message")
+	}
+	defMsg := def.Messages[0].ID
+
+	// A separate timed campaign whose URL we will (mis)use.
+	otherID, err := adsSvc.CreateCampaign(ctx, ads.Campaign{Name: "Own-" + uuid.NewString()[:8], Weight: 10, Enabled: true})
+	if err != nil {
+		t.Fatalf("create campaign: %v", err)
+	}
+	t.Cleanup(func() { _ = adsSvc.DeleteCampaign(ctx, otherID) })
+
+	// Deleting the default's message through the other campaign's URL is refused,
+	// and the default keeps its message (the bypass is closed).
+	if code, body := consoleDo(h, http.MethodPost, base+"/banners/"+otherID.String()+"/messages/"+defMsg.String()+"/delete", "", origin); code != http.StatusOK || !strings.Contains(body, "Not found") {
+		t.Fatalf("cross-campaign delete = %d, has 'Not found'=%v", code, strings.Contains(body, "Not found"))
+	}
+	// Editing it through the wrong campaign is refused too.
+	if code, body := consoleDo(h, http.MethodPost, base+"/banners/"+otherID.String()+"/messages/"+defMsg.String(), "body_en=Hijacked&body_ru=Взлом", origin); code != http.StatusOK || !strings.Contains(body, "Not found") {
+		t.Fatalf("cross-campaign edit = %d, has 'Not found'=%v", code, strings.Contains(body, "Not found"))
+	}
+	// The default's message is intact.
+	again := defaultCampaign(t, adsSvc)
+	if len(again.Messages) != len(def.Messages) {
+		t.Fatalf("default messages = %d, want %d (unchanged)", len(again.Messages), len(def.Messages))
+	}
+	if again.Messages[0].BodyEn != def.Messages[0].BodyEn {
+		t.Fatalf("default message body changed: %q -> %q", def.Messages[0].BodyEn, again.Messages[0].BodyEn)
+	}
+}
+
+// profileBanner is the banner block of the profile.get JSON response.
+type profileBanner struct {
+	Banner *struct {
+		Campaigns []struct {
+			Weight   int      `json:"weight"`
+			Messages []string `json:"messages"`
+		} `json:"campaigns"`
+		Timings struct {
+			HoldMs int `json:"hold_ms"`
+		} `json:"timings"`
+	} `json:"banner"`
+}
+
+// TestBannerProfileEligibility checks the profile.get banner block follows
+// eligibility: a free account sees it, the no_banner role and a non-empty hint
+// wallet each suppress it.
+func TestBannerProfileEligibility(t *testing.T) {
+	ctx := context.Background()
+	srv, _ := bannerServer(t)
+	accounts := account.NewStore(testDB)
+	id := provisionAccount(t)
+
+	getBanner := func() profileBanner {
+		t.Helper()
+		rec := userGet(t, srv, "/api/v1/user/profile", id)
+		if rec.Code != http.StatusOK {
+			t.Fatalf("profile = %d, want 200", rec.Code)
+		}
+		var p profileBanner
+		if err := json.Unmarshal(rec.Body.Bytes(), &p); err != nil {
+			t.Fatalf("decode profile: %v", err)
+		}
+		return p
+	}
+
+	// A free account with an empty hint wallet and no role is eligible.
+	p := getBanner()
+	if p.Banner == nil || len(p.Banner.Campaigns) == 0 || p.Banner.Timings.HoldMs <= 0 {
+		t.Fatalf("eligible account: banner=%v", p.Banner)
+	}
+
+	// The no_banner role suppresses it unconditionally.
+	if err := accounts.GrantRole(ctx, id, account.RoleNoBanner); err != nil {
+		t.Fatalf("grant role: %v", err)
+	}
+	if p := getBanner(); p.Banner != nil {
+		t.Fatal("no_banner role still shows the banner")
+	}
+	if err := accounts.RevokeRole(ctx, id, account.RoleNoBanner); err != nil {
+		t.Fatalf("revoke role: %v", err)
+	}
+
+	// A non-empty hint wallet suppresses it.
+	if _, err := accounts.GrantHints(ctx, id, 5); err != nil {
+		t.Fatalf("grant hints: %v", err)
+	}
+	if p := getBanner(); p.Banner != nil {
+		t.Fatal("a non-empty hint wallet still shows the banner")
+	}
+}
+
+// TestBannerSurvivesProfileUpdate guards that a profile update (e.g. a language switch) returns the
+// banner block too, so the client's profile keeps the banner instead of losing it until reload.
+func TestBannerSurvivesProfileUpdate(t *testing.T) {
+	srv, _ := bannerServer(t)
+	id := provisionAccount(t)
+
+	body := `{"display_name":"Tester","preferred_language":"ru","time_zone":"UTC","away_start":"00:00",` +
+		`"away_end":"00:00","block_chat":false,"block_friend_requests":false,"notifications_in_app_only":true,` +
+		`"variant_preferences":["erudit_ru"]}`
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPut, "/api/v1/user/profile", strings.NewReader(body))
+	req.Header.Set("X-User-ID", id.String())
+	req.Header.Set("Content-Type", "application/json")
+	srv.Handler().ServeHTTP(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("update profile = %d: %s", rec.Code, rec.Body.String())
+	}
+	var p profileBanner
+	if err := json.Unmarshal(rec.Body.Bytes(), &p); err != nil {
+		t.Fatalf("decode: %v", err)
+	}
+	if p.Banner == nil || len(p.Banner.Campaigns) == 0 {
+		t.Fatalf("profile update dropped the banner block: %v", p.Banner)
+	}
+}

backend/internal/inttest/block_test.go

@@ -0,0 +1,322 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"errors"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/account"
+	"scrabble/backend/internal/engine"
+	"scrabble/backend/internal/game"
+	"scrabble/backend/internal/notify"
+	"scrabble/backend/internal/social"
+)
+
+// TestBlockInstantReadsExistingUnread checks that blocking marks read any chat the blocked
+// user had left unread for the blocker in their shared games, so no stale unread badge
+// lingers for someone the blocker no longer sees.
+func TestBlockInstantReadsExistingUnread(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	gameID, seats := newGameWithSeats(t, 2)
+	sender, viewer := seats[0], seats[1] // seat 0 moves first, so it may chat
+
+	if _, err := svc.PostMessage(ctx, gameID, sender, "good luck", ""); err != nil {
+		t.Fatalf("post: %v", err)
+	}
+	if unread, _ := svc.HasUnread(ctx, gameID, viewer); !unread {
+		t.Fatal("viewer should have the message unread before blocking")
+	}
+	if err := svc.Block(ctx, viewer, sender); err != nil {
+		t.Fatalf("block: %v", err)
+	}
+	if unread, _ := svc.HasUnread(ctx, gameID, viewer); unread {
+		t.Error("blocking should instant-read the blocked sender's prior unread message")
+	}
+}
+
+// TestChatFromBlockedIsBornReadAndNotDelivered checks the store-but-hide path for chat: a
+// message the blocked user sends is stored and visible to themselves, but is born read for
+// the blocker, never delivered to them, and hidden from their view.
+func TestChatFromBlockedIsBornReadAndNotDelivered(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	pub := &capturePublisher{}
+	svc.SetNotifier(pub)
+	gameID, seats := newGameWithSeats(t, 2)
+	blocked, blocker := seats[0], seats[1] // seat 0 moves first, so the blocked user may chat
+
+	if err := svc.Block(ctx, blocker, blocked); err != nil {
+		t.Fatalf("block: %v", err)
+	}
+	if _, err := svc.PostMessage(ctx, gameID, blocked, "hello there", ""); err != nil {
+		t.Fatalf("blocked user's post = %v, want nil (it must look ordinary to them)", err)
+	}
+	if unread, _ := svc.HasUnread(ctx, gameID, blocker); unread {
+		t.Error("the blocked sender's message must be born read for the blocker")
+	}
+	if pub.delivered(blocker, notify.KindChatMessage) {
+		t.Error("the blocked sender's message must not be delivered to the blocker")
+	}
+	if msgs, _ := svc.Messages(ctx, gameID, blocker); len(msgs) != 0 {
+		t.Errorf("blocker still sees the blocked sender's message: %+v", msgs)
+	}
+	if msgs, _ := svc.Messages(ctx, gameID, blocked); len(msgs) != 1 {
+		t.Errorf("the blocked sender should see their own message, got %+v", msgs)
+	}
+}
+
+// TestChatToBlockedIsRejected checks the blocker-side guard: a player cannot post when their
+// only opponent is someone they have blocked (the composer is hidden client-side too).
+func TestChatToBlockedIsRejected(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	gameID, seats := newGameWithSeats(t, 2)
+	blocker, blocked := seats[0], seats[1] // blocker moves first, so it is the one trying to chat
+
+	if err := svc.Block(ctx, blocker, blocked); err != nil {
+		t.Fatalf("block: %v", err)
+	}
+	if _, err := svc.PostMessage(ctx, gameID, blocker, "hi", ""); !errors.Is(err, social.ErrRecipientBlocked) {
+		t.Fatalf("chat to blocked opponent = %v, want ErrRecipientBlocked", err)
+	}
+}
+
+// TestNudgeFromBlockedIsBornReadAndNotDelivered checks the store-but-hide path for nudge: a
+// nudge the blocked user sends is recorded (so their once-per-hour cooldown applies, looking
+// ordinary to them) but is born read and never delivered to the blocker.
+func TestNudgeFromBlockedIsBornReadAndNotDelivered(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	pub := &capturePublisher{}
+	svc.SetNotifier(pub)
+	gameID, seats := newGameWithSeats(t, 2)
+	blocker, blocked := seats[0], seats[1] // seat 0 awaited; the blocked seat-1 player nudges it
+
+	if err := svc.Block(ctx, blocker, blocked); err != nil {
+		t.Fatalf("block: %v", err)
+	}
+	if _, err := svc.Nudge(ctx, gameID, blocked); err != nil {
+		t.Fatalf("blocked user's nudge = %v, want nil (it must look ordinary to them)", err)
+	}
+	if unread, _ := svc.HasUnread(ctx, gameID, blocker); unread {
+		t.Error("the blocked sender's nudge must be born read for the blocker")
+	}
+	if pub.delivered(blocker, notify.KindNudge) {
+		t.Error("the blocked sender's nudge must not be delivered to the blocker")
+	}
+	// The nudge is still recorded, so the cooldown applies (the blocked user notices nothing).
+	if _, ok, _ := svc.LastNudgeAt(ctx, gameID, blocked); !ok {
+		t.Error("the suppressed nudge should still be recorded")
+	}
+}
+
+// TestNudgeToBlockedIsRejected checks the blocker-side guard: a player cannot nudge the
+// awaited opponent when they have blocked them.
+func TestNudgeToBlockedIsRejected(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	gameID, seats := newGameWithSeats(t, 2)
+	blocked, blocker := seats[0], seats[1] // seat 0 awaited; the blocker (seat 1) tries to nudge it
+
+	if err := svc.Block(ctx, blocker, blocked); err != nil {
+		t.Fatalf("block: %v", err)
+	}
+	if _, err := svc.Nudge(ctx, gameID, blocker); !errors.Is(err, social.ErrRecipientBlocked) {
+		t.Fatalf("nudge to blocked opponent = %v, want ErrRecipientBlocked", err)
+	}
+}
+
+// TestBlockPublishesToBlockerOnly checks that block and unblock confirm to the blocker (so
+// their other sessions update in place) and never reach the blocked user.
+func TestBlockPublishesToBlockerOnly(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	pub := &capturePublisher{}
+	svc.SetNotifier(pub)
+	blocker, blocked := provisionAccount(t), provisionAccount(t)
+
+	if err := svc.Block(ctx, blocker, blocked); err != nil {
+		t.Fatalf("block: %v", err)
+	}
+	if !pub.notified(blocker, notify.NotifyUserBlocked) {
+		t.Error("the blocker should receive a user_blocked event")
+	}
+	if pub.notified(blocked, notify.NotifyUserBlocked) {
+		t.Error("the blocked user must never receive a user_blocked event")
+	}
+	if err := svc.Unblock(ctx, blocker, blocked); err != nil {
+		t.Fatalf("unblock: %v", err)
+	}
+	if !pub.notified(blocker, notify.NotifyUserUnblocked) {
+		t.Error("the blocker should receive a user_unblocked event")
+	}
+	if pub.notified(blocked, notify.NotifyUserUnblocked) {
+		t.Error("the blocked user must never receive a user_unblocked event")
+	}
+}
+
+// TestMatchmakingExcludesBlockedPlayers checks auto-match never pairs two players with a
+// block between them (either direction), while an unblocked third player still joins.
+func TestMatchmakingExcludesBlockedPlayers(t *testing.T) {
+	ctx := context.Background()
+	clearOpenGames(t)
+	mm := newMatchmaker(t, newRobotService(t, newGameService()), 90*time.Second, 90*time.Second)
+	soc := newSocialService()
+	mm.SetBlocker(soc)
+	a, b, c := provisionAccount(t), provisionAccount(t), provisionAccount(t)
+
+	if err := soc.Block(ctx, a, b); err != nil {
+		t.Fatalf("block: %v", err)
+	}
+	// The block is seen from both sides — the exclusion set unions both directions.
+	if !contains(blockedWith(t, soc, a), b) || !contains(blockedWith(t, soc, b), a) {
+		t.Fatal("a block must appear in BlockedWith for both the blocker and the blocked")
+	}
+
+	// b opens a game awaiting an opponent.
+	r1, err := mm.Enqueue(ctx, b, engine.VariantEnglish, true)
+	if err != nil {
+		t.Fatalf("enqueue b: %v", err)
+	}
+	if r1.Matched {
+		t.Fatal("first enqueue must open a game, not match")
+	}
+	// a must not join b's game (a blocked b): it opens its own instead.
+	r2, err := mm.Enqueue(ctx, a, engine.VariantEnglish, true)
+	if err != nil {
+		t.Fatalf("enqueue a: %v", err)
+	}
+	if r2.Matched || r2.Game.ID == r1.Game.ID {
+		t.Fatalf("a joined the blocked player's game %s (matched %v), want a fresh game", r1.Game.ID, r2.Matched)
+	}
+	// A third, unblocked player joins b's still-open game (the oldest), proving the exclusion
+	// is specific to the blocked pair, not a blanket refusal.
+	r3, err := mm.Enqueue(ctx, c, engine.VariantEnglish, true)
+	if err != nil {
+		t.Fatalf("enqueue c: %v", err)
+	}
+	if !r3.Matched || r3.Game.ID != r1.Game.ID {
+		t.Fatalf("unblocked c = (game %s, matched %v), want it to join b's open game %s", r3.Game.ID, r3.Matched, r1.Game.ID)
+	}
+}
+
+// TestAdminSocialLists checks the admin user card's blocks / blocked-by / friends queries
+// return the full truth in both directions, including a friendship that a block overrides but
+// does not delete.
+func TestAdminSocialLists(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	_, seats := newGameWithSeats(t, 2)
+	a, b := seats[0], seats[1]
+	if err := svc.SendFriendRequest(ctx, a, b); err != nil {
+		t.Fatalf("request: %v", err)
+	}
+	if err := svc.RespondFriendRequest(ctx, b, a, true); err != nil {
+		t.Fatalf("accept: %v", err)
+	}
+	if err := svc.Block(ctx, a, b); err != nil {
+		t.Fatalf("block: %v", err)
+	}
+
+	blocks, err := svc.AdminBlocksBy(ctx, a)
+	if err != nil {
+		t.Fatalf("admin blocks by: %v", err)
+	}
+	if len(blocks) != 1 || blocks[0].AccountID != b || blocks[0].At.IsZero() {
+		t.Errorf("a's blocks = %v, want [b] with a date", blocks)
+	}
+	blockedBy, err := svc.AdminBlockedBy(ctx, b)
+	if err != nil {
+		t.Fatalf("admin blocked by: %v", err)
+	}
+	if len(blockedBy) != 1 || blockedBy[0].AccountID != a {
+		t.Errorf("b's blocked-by = %v, want [a]", blockedBy)
+	}
+	// The friendship survives the block, so it still shows on both admin friend lists.
+	friendsA, err := svc.AdminFriends(ctx, a)
+	if err != nil {
+		t.Fatalf("admin friends: %v", err)
+	}
+	if len(friendsA) != 1 || friendsA[0].AccountID != b || friendsA[0].At.IsZero() {
+		t.Errorf("a's admin friends = %v, want [b] with a date", friendsA)
+	}
+	if friendsB, err := svc.AdminFriends(ctx, b); err != nil || len(friendsB) != 1 || friendsB[0].AccountID != a {
+		t.Errorf("b's admin friends = %v (err %v), want [a]", friendsB, err)
+	}
+}
+
+// TestRobotBlockIsPerGameAndMatchmakerImmune checks that blocking a disguised-robot opponent
+// is recorded per-game in robot_blocks — never in the blocks table or against the shared robot
+// account — so the matchmaker keeps the robot free, and that unblocking by the row id removes it.
+func TestRobotBlockIsPerGameAndMatchmakerImmune(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	accs := account.NewStore(testDB)
+	human := provisionAccount(t)
+	robot, err := accs.ProvisionRobot(ctx, "robot-block-"+uuid.NewString(), "Robbie")
+	if err != nil {
+		t.Fatalf("provision robot: %v", err)
+	}
+	g, err := newGameService().Create(ctx, game.CreateParams{
+		Variant: engine.VariantEnglish, Seats: []uuid.UUID{human, robot.ID},
+		TurnTimeout: 24 * time.Hour, Seed: openingSeed(t),
+	})
+	if err != nil {
+		t.Fatalf("create game: %v", err)
+	}
+
+	if err := svc.BlockInGame(ctx, human, robot.ID, g.ID); err != nil {
+		t.Fatalf("block robot: %v", err)
+	}
+	rbs, err := svc.ListRobotBlocks(ctx, human)
+	if err != nil {
+		t.Fatalf("list robot blocks: %v", err)
+	}
+	if len(rbs) != 1 || rbs[0].GameID != g.ID {
+		t.Fatalf("robot blocks = %v, want one for game %s", rbs, g.ID)
+	}
+	if bl, _ := svc.ListBlocks(ctx, human); len(bl) != 0 {
+		t.Errorf("blocks table must stay empty for a robot block, got %v", bl)
+	}
+	if yes, _ := svc.IsBlocked(ctx, human, robot.ID); yes {
+		t.Error("the shared robot account must never be blocked")
+	}
+	// Matchmaking immunity: the robot is never in the caller's exclusion set, so the matchmaker
+	// keeps giving robots and the player can never be starved by blocking them.
+	if with, _ := svc.BlockedWith(ctx, human); contains(with, robot.ID) {
+		t.Error("a robot block must not put the robot in BlockedWith")
+	}
+	// Unblock by the robot_blocks row id removes it.
+	if err := svc.Unblock(ctx, human, rbs[0].ID); err != nil {
+		t.Fatalf("unblock robot: %v", err)
+	}
+	if rbs, _ := svc.ListRobotBlocks(ctx, human); len(rbs) != 0 {
+		t.Errorf("robot block not removed by unblock: %v", rbs)
+	}
+}
+
+// blockedWith reads the both-direction block set for id.
+func blockedWith(t *testing.T, soc *social.Service, id uuid.UUID) []uuid.UUID {
+	t.Helper()
+	ids, err := soc.BlockedWith(context.Background(), id)
+	if err != nil {
+		t.Fatalf("blocked with: %v", err)
+	}
+	return ids
+}
+
+// contains reports whether ids includes want.
+func contains(ids []uuid.UUID, want uuid.UUID) bool {
+	for _, id := range ids {
+		if id == want {
+			return true
+		}
+	}
+	return false
+}

backend/internal/inttest/chat_access_test.go

@@ -0,0 +1,315 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	"go.uber.org/zap/zaptest"
+
+	"scrabble/backend/internal/account"
+	"scrabble/backend/internal/notify"
+	"scrabble/backend/internal/server"
+	"scrabble/backend/internal/session"
+)
+
+// chatAccessBody mirrors the backend's /internal/chat-access JSON for the test.
+type chatAccessBody struct {
+	ExternalID string `json:"external_id"`
+	Registered bool   `json:"registered"`
+	Eligible   bool   `json:"eligible"`
+}
+
+// chatAccess issues the gateway-internal chat-access query and asserts a 200.
+func chatAccess(t *testing.T, srv *server.Server, body string) chatAccessBody {
+	t.Helper()
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/internal/chat-access", strings.NewReader(body))
+	req.Header.Set("Content-Type", "application/json")
+	srv.Handler().ServeHTTP(rec, req)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("chat-access %s = %d: %s", body, rec.Code, rec.Body.String())
+	}
+	var b chatAccessBody
+	if err := json.Unmarshal(rec.Body.Bytes(), &b); err != nil {
+		t.Fatalf("decode chat-access: %v", err)
+	}
+	return b
+}
+
+// TestChatAccessResolver drives the gateway-internal eligibility resolver over HTTP:
+// the registered/suspended/chat_muted truth table by Telegram identity and by account
+// id, the suspension dominating the chat_muted role, an unknown identity reported
+// unregistered, and an account with no Telegram identity carrying an empty external_id.
+func TestChatAccessResolver(t *testing.T) {
+	ctx := context.Background()
+	accounts := account.NewStore(testDB)
+	srv := server.New(":0", server.Deps{Logger: zaptest.NewLogger(t), DB: testDB, Accounts: accounts})
+
+	ext := "tg-" + uuid.NewString()
+	acc, _, err := accounts.ProvisionTelegram(ctx, ext, "en", "", "Chatter", "")
+	if err != nil {
+		t.Fatalf("provision: %v", err)
+	}
+	id := acc.ID
+
+	byExt := func() chatAccessBody { return chatAccess(t, srv, `{"external_id":"`+ext+`"}`) }
+	byUser := func() chatAccessBody { return chatAccess(t, srv, `{"user_id":"`+id.String()+`"}`) }
+
+	// A registered, unsuspended, unmuted account is eligible by either address, and the
+	// account-id query resolves back to its Telegram identity.
+	if b := byExt(); !b.Registered || !b.Eligible || b.ExternalID != ext {
+		t.Fatalf("fresh by external_id = %+v, want registered+eligible+ext", b)
+	}
+	if b := byUser(); !b.Registered || !b.Eligible || b.ExternalID != ext {
+		t.Fatalf("fresh by user_id = %+v, want registered+eligible+ext", b)
+	}
+
+	// A suspension mutes; a lift restores.
+	if _, err := accounts.Suspend(ctx, id, nil, "", "", nil); err != nil {
+		t.Fatalf("suspend: %v", err)
+	}
+	if b := byExt(); !b.Registered || b.Eligible {
+		t.Fatalf("suspended = %+v, want registered but not eligible", b)
+	}
+	if err := accounts.LiftSuspension(ctx, id); err != nil {
+		t.Fatalf("lift: %v", err)
+	}
+	if b := byExt(); !b.Eligible {
+		t.Fatalf("after lift = %+v, want eligible", b)
+	}
+
+	// The chat_muted role mutes independently; a revoke restores.
+	if err := accounts.GrantRole(ctx, id, account.RoleChatMuted); err != nil {
+		t.Fatalf("grant chat_muted: %v", err)
+	}
+	if b := byExt(); !b.Registered || b.Eligible {
+		t.Fatalf("chat_muted = %+v, want registered but not eligible", b)
+	}
+
+	// Suspension dominates: while chat_muted is set, lifting a concurrent suspension
+	// must not re-grant chat (the role still mutes).
+	if _, err := accounts.Suspend(ctx, id, nil, "", "", nil); err != nil {
+		t.Fatalf("suspend over mute: %v", err)
+	}
+	if b := byExt(); b.Eligible {
+		t.Fatalf("suspended+muted = %+v, want not eligible", b)
+	}
+	if err := accounts.LiftSuspension(ctx, id); err != nil {
+		t.Fatalf("lift over mute: %v", err)
+	}
+	if b := byExt(); b.Eligible {
+		t.Fatalf("lifted but still muted = %+v, want not eligible", b)
+	}
+	if err := accounts.RevokeRole(ctx, id, account.RoleChatMuted); err != nil {
+		t.Fatalf("revoke chat_muted: %v", err)
+	}
+	if b := byExt(); !b.Eligible {
+		t.Fatalf("after revoke = %+v, want eligible", b)
+	}
+
+	// An unknown Telegram identity is unregistered (and thus left muted).
+	if b := chatAccess(t, srv, `{"external_id":"tg-missing-`+uuid.NewString()+`"}`); b.Registered || b.Eligible {
+		t.Fatalf("unknown identity = %+v, want neither registered nor eligible", b)
+	}
+
+	// An account with no Telegram identity (a guest) carries an empty external_id, so
+	// the gateway has nothing to gate.
+	guest := provisionGuest(t)
+	if b := chatAccess(t, srv, `{"user_id":"`+guest.String()+`"}`); b.ExternalID != "" || b.Registered {
+		t.Fatalf("guest by user_id = %+v, want empty external_id and not registered", b)
+	}
+
+	// A request naming neither address is a bad request.
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, "/api/v1/internal/chat-access", strings.NewReader(`{}`))
+	req.Header.Set("Content-Type", "application/json")
+	srv.Handler().ServeHTTP(rec, req)
+	if rec.Code != http.StatusBadRequest {
+		t.Fatalf("empty query = %d, want 400", rec.Code)
+	}
+}
+
+// captureNotifier records every published intent so a test can assert which live
+// events a console action emitted.
+type captureNotifier struct {
+	mu      sync.Mutex
+	intents []notify.Intent
+}
+
+func (c *captureNotifier) Publish(in ...notify.Intent) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	c.intents = append(c.intents, in...)
+}
+
+// count returns how many intents of kind addressed to user were captured.
+func (c *captureNotifier) count(user uuid.UUID, kind string) int {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	n := 0
+	for _, in := range c.intents {
+		if in.UserID == user && in.Kind == kind {
+			n++
+		}
+	}
+	return n
+}
+
+// TestChatAccessPublishedOnModeration drives the admin console and asserts each
+// moderation action that can change chat eligibility — block, unblock, and the
+// chat_muted role grant/revoke — emits the chat_access_changed signal the gateway
+// turns into a chat-gate command.
+func TestChatAccessPublishedOnModeration(t *testing.T) {
+	notifier := &captureNotifier{}
+	srv := server.New(":0", server.Deps{
+		Logger:   zaptest.NewLogger(t),
+		DB:       testDB,
+		Accounts: account.NewStore(testDB),
+		Games:    newGameService(),
+		Registry: testRegistry,
+		DictDir:  dictDir(),
+		Notifier: notifier,
+	})
+	h := srv.Handler()
+	id := provisionAccount(t)
+	base := "http://admin.test/_gm/users/" + id.String()
+	const origin = "http://admin.test"
+
+	steps := []struct {
+		name, path, body string
+		want             string
+	}{
+		{"block", "/block", "duration=permanent", "Blocked"},
+		{"unblock", "/unblock", "", "Unblocked"},
+		{"grant chat_muted", "/grant-role", "role=chat_muted", "Role granted"},
+		{"revoke chat_muted", "/revoke-role", "role=chat_muted", "Role revoked"},
+	}
+	for i, s := range steps {
+		code, body := consoleDo(h, http.MethodPost, base+s.path, s.body, origin)
+		if code != http.StatusOK || !strings.Contains(body, s.want) {
+			t.Fatalf("%s = %d, has %q = %v", s.name, code, s.want, strings.Contains(body, s.want))
+		}
+		if got := notifier.count(id, notify.KindChatAccessChanged); got != i+1 {
+			t.Fatalf("after %s: chat_access_changed count = %d, want %d", s.name, got, i+1)
+		}
+	}
+}
+
+// TestChatAccessPublishedOnFirstRegistration checks that a Telegram first contact
+// (the sessions/telegram endpoint creating the account) emits chat_access_changed —
+// the re-grant for a user who joined the moderated chat before registering — and that
+// a repeat login does not re-emit.
+func TestChatAccessPublishedOnFirstRegistration(t *testing.T) {
+	notifier := &captureNotifier{}
+	srv := server.New(":0", server.Deps{
+		Logger:   zaptest.NewLogger(t),
+		DB:       testDB,
+		Accounts: account.NewStore(testDB),
+		Sessions: session.NewService(session.NewStore(testDB), session.NewCache()),
+		Notifier: notifier,
+	})
+	h := srv.Handler()
+	ext := "tg-" + uuid.NewString()
+
+	post := func() {
+		rec := httptest.NewRecorder()
+		req := httptest.NewRequest(http.MethodPost, "/api/v1/internal/sessions/telegram",
+			strings.NewReader(`{"external_id":"`+ext+`","language_code":"en","first_name":"Reg"}`))
+		req.Header.Set("Content-Type", "application/json")
+		h.ServeHTTP(rec, req)
+		if rec.Code != http.StatusOK {
+			t.Fatalf("telegram auth = %d: %s", rec.Code, rec.Body.String())
+		}
+	}
+
+	post()
+	acc, err := account.NewStore(testDB).AccountByIdentity(context.Background(), account.KindTelegram, ext)
+	if err != nil {
+		t.Fatalf("lookup: %v", err)
+	}
+	if got := notifier.count(acc.ID, notify.KindChatAccessChanged); got != 1 {
+		t.Fatalf("first registration: chat_access_changed count = %d, want 1", got)
+	}
+	// A repeat login (the account already exists) must not re-emit.
+	post()
+	if got := notifier.count(acc.ID, notify.KindChatAccessChanged); got != 1 {
+		t.Fatalf("repeat login: chat_access_changed count = %d, want still 1", got)
+	}
+}
+
+// TestSuspensionsExpiredBetween checks the sweeper's window query: a non-lifted
+// temporary block whose expiry falls in the window is returned, while one outside the
+// window, a permanent block, and a lifted block are not.
+func TestSuspensionsExpiredBetween(t *testing.T) {
+	ctx := context.Background()
+	accounts := account.NewStore(testDB)
+
+	// A temporary block whose expiry already lapsed at a known instant.
+	tempID := provisionAccount(t)
+	expiry := time.Now().Add(-time.Hour).Truncate(time.Second)
+	if _, err := accounts.Suspend(ctx, tempID, &expiry, "", "", nil); err != nil {
+		t.Fatalf("suspend temp: %v", err)
+	}
+
+	contains := func(ids []uuid.UUID, want uuid.UUID) bool {
+		for _, id := range ids {
+			if id == want {
+				return true
+			}
+		}
+		return false
+	}
+
+	// A window straddling the expiry returns the account.
+	got, err := accounts.SuspensionsExpiredBetween(ctx, expiry.Add(-time.Minute), expiry.Add(time.Minute))
+	if err != nil {
+		t.Fatalf("expired between: %v", err)
+	}
+	if !contains(got, tempID) {
+		t.Fatalf("window over expiry missing the lapsed block %s", tempID)
+	}
+	// A window entirely after the expiry does not.
+	got, err = accounts.SuspensionsExpiredBetween(ctx, expiry.Add(time.Minute), expiry.Add(2*time.Minute))
+	if err != nil {
+		t.Fatalf("expired between (after): %v", err)
+	}
+	if contains(got, tempID) {
+		t.Fatalf("window after expiry should not return %s", tempID)
+	}
+
+	// A permanent block never appears, even in a wide window.
+	permID := provisionAccount(t)
+	if _, err := accounts.Suspend(ctx, permID, nil, "", "", nil); err != nil {
+		t.Fatalf("suspend perm: %v", err)
+	}
+	// A lifted block does not appear either. The block must still be in force when lifted
+	// (LiftSuspension only lifts in-force blocks), so its expiry is in the future and the
+	// wide window below still covers it — yet lifted_at excludes it.
+	liftID := provisionAccount(t)
+	liftExpiry := time.Now().Add(30 * time.Minute).Truncate(time.Second)
+	if _, err := accounts.Suspend(ctx, liftID, &liftExpiry, "", "", nil); err != nil {
+		t.Fatalf("suspend lift: %v", err)
+	}
+	if err := accounts.LiftSuspension(ctx, liftID); err != nil {
+		t.Fatalf("lift: %v", err)
+	}
+	wide, err := accounts.SuspensionsExpiredBetween(ctx, time.Now().Add(-2*time.Hour), time.Now().Add(time.Hour))
+	if err != nil {
+		t.Fatalf("expired between (wide): %v", err)
+	}
+	if contains(wide, permID) {
+		t.Fatalf("permanent block %s must not be reported as expired", permID)
+	}
+	if contains(wide, liftID) {
+		t.Fatalf("lifted block %s must not be reported as expired", liftID)
+	}
+}

backend/internal/inttest/chatread_test.go

@@ -0,0 +1,227 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/account"
+	"scrabble/backend/internal/engine"
+	"scrabble/backend/internal/game"
+	"scrabble/backend/internal/social"
+)
+
+// TestChatUnreadAndMarkRead checks a text message marks every recipient seat unread (not the
+// sender), surfaces through HasUnread / UnreadGames and the message-level HasUnreadMessage /
+// UnreadMessageGames (it is a real message, not a nudge), and that MarkRead clears the reader's bit.
+func TestChatUnreadAndMarkRead(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	gameID, seats := newGameWithSeats(t, 2) // seat 0 is to move
+
+	if _, err := svc.PostMessage(ctx, gameID, seats[0], "good luck", ""); err != nil {
+		t.Fatalf("post: %v", err)
+	}
+	// The opponent has it unread; the sender does not.
+	if unread, _ := svc.HasUnread(ctx, gameID, seats[1]); !unread {
+		t.Error("recipient should have the message unread")
+	}
+	if unread, _ := svc.HasUnread(ctx, gameID, seats[0]); unread {
+		t.Error("sender should not have their own message unread")
+	}
+	if set, err := svc.UnreadGames(ctx, seats[1]); err != nil {
+		t.Fatalf("unread games: %v", err)
+	} else if !set[gameID] {
+		t.Error("UnreadGames should include the game for the recipient")
+	}
+	// A text message also raises the message-level flags (it is not just a nudge).
+	if msg, _ := svc.HasUnreadMessage(ctx, gameID, seats[1]); !msg {
+		t.Error("recipient should have the message flagged as an unread message")
+	}
+	if set, err := svc.UnreadMessageGames(ctx, seats[1]); err != nil {
+		t.Fatalf("unread message games: %v", err)
+	} else if !set[gameID] {
+		t.Error("UnreadMessageGames should include the game for a text message")
+	}
+
+	// Reading it clears the recipient's bit and reports one entry marked.
+	if n, err := svc.MarkRead(ctx, gameID, seats[1]); err != nil {
+		t.Fatalf("mark read: %v", err)
+	} else if n != 1 {
+		t.Errorf("marked %d, want 1", n)
+	}
+	if unread, _ := svc.HasUnread(ctx, gameID, seats[1]); unread {
+		t.Error("message should be read after MarkRead")
+	}
+	// A second MarkRead is a no-op — nothing is left unread.
+	if n, _ := svc.MarkRead(ctx, gameID, seats[1]); n != 0 {
+		t.Errorf("second mark read marked %d, want 0", n)
+	}
+}
+
+// TestNudgeUnreadTargetsOnlyToMove checks, in a three-player game, that a nudge marks ONLY the
+// awaited (to-move) seat unread — never the other waiting players. This is the owner's nudge
+// targeting invariant, now observable through the unread bitmask. It also checks a nudge raises
+// HasUnread but not the message-level flags, so the badge can colour it apart from a real message.
+func TestNudgeUnreadTargetsOnlyToMove(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	gameID, seats := newGameWithSeats(t, 3) // seat 0 is to move
+
+	// A waiting player nudges; only the awaited seat 0 is targeted.
+	if _, err := svc.Nudge(ctx, gameID, seats[1]); err != nil {
+		t.Fatalf("nudge: %v", err)
+	}
+	if unread, _ := svc.HasUnread(ctx, gameID, seats[0]); !unread {
+		t.Error("the awaited seat should have the nudge unread")
+	}
+	// A nudge is not a message: it must not raise the message-level flags.
+	if msg, _ := svc.HasUnreadMessage(ctx, gameID, seats[0]); msg {
+		t.Error("a nudge must not be flagged as an unread message")
+	}
+	if set, _ := svc.UnreadMessageGames(ctx, seats[0]); set[gameID] {
+		t.Error("UnreadMessageGames must not include a game whose only unread entry is a nudge")
+	}
+	if unread, _ := svc.HasUnread(ctx, gameID, seats[2]); unread {
+		t.Error("a non-awaited waiting seat must not receive the nudge")
+	}
+	if unread, _ := svc.HasUnread(ctx, gameID, seats[1]); unread {
+		t.Error("the nudging sender must not have it unread")
+	}
+}
+
+// TestTextMessageUnreadReachesAllOpponents checks a text message in a three-player game marks both
+// opponents (every seated player but the sender) unread.
+func TestTextMessageUnreadReachesAllOpponents(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	gameID, seats := newGameWithSeats(t, 3) // seat 0 is to move and may chat
+
+	if _, err := svc.PostMessage(ctx, gameID, seats[0], "hello all", ""); err != nil {
+		t.Fatalf("post: %v", err)
+	}
+	for _, s := range []int{1, 2} {
+		if unread, _ := svc.HasUnread(ctx, gameID, seats[s]); !unread {
+			t.Errorf("seat %d should have the text message unread", s)
+		}
+	}
+	if unread, _ := svc.HasUnread(ctx, gameID, seats[0]); unread {
+		t.Error("the sender should not have their own message unread")
+	}
+}
+
+// TestNudgeClearedByMove checks the move path clears a nudge the actor answered by moving: the
+// game service's wired NudgeClearer flips the awaited seat's nudge to read on commit.
+func TestNudgeClearedByMove(t *testing.T) {
+	ctx := context.Background()
+	gameSvc, gameID, seats, play := newDraftGame(t)
+	socialSvc := newSocialService()
+	gameSvc.SetNudgeClearer(socialSvc.ClearNudges)
+
+	// The waiting seat 1 nudges the to-move seat 0.
+	if _, err := socialSvc.Nudge(ctx, gameID, seats[1]); err != nil {
+		t.Fatalf("nudge: %v", err)
+	}
+	if unread, _ := socialSvc.HasUnread(ctx, gameID, seats[0]); !unread {
+		t.Fatal("seat 0 should have the nudge unread before moving")
+	}
+	// Seat 0 answers by moving — the commit clears its pending nudge.
+	if _, err := gameSvc.SubmitPlay(ctx, gameID, seats[0], play.Tiles); err != nil {
+		t.Fatalf("submit play: %v", err)
+	}
+	if unread, _ := socialSvc.HasUnread(ctx, gameID, seats[0]); unread {
+		t.Error("the nudge should be cleared once the awaited player has moved")
+	}
+}
+
+// TestChatToRobotIsBornRead checks a text message to a disguised robot opponent (a pooled
+// robot substituted into an ordinary, non-AI game) is born read: the robot never opens the
+// chat, so the message must not linger unread (skewing the count and the read metric).
+func TestChatToRobotIsBornRead(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	human := provisionAccount(t)
+	robot, err := account.NewStore(testDB).ProvisionRobot(ctx, "robot-chat-"+uuid.NewString(), "Robbie")
+	if err != nil {
+		t.Fatalf("provision robot: %v", err)
+	}
+	g, err := newGameService().Create(ctx, game.CreateParams{
+		Variant: engine.VariantEnglish, Seats: []uuid.UUID{human, robot.ID},
+		TurnTimeout: 24 * time.Hour, Seed: openingSeed(t),
+	})
+	if err != nil {
+		t.Fatalf("create game: %v", err)
+	}
+	// The human (seat 0, to move) chats the disguised robot; the message is born read.
+	msg, err := svc.PostMessage(ctx, g.ID, human, "good luck", "")
+	if err != nil {
+		t.Fatalf("post: %v", err)
+	}
+	if items, _ := svc.AdminListMessages(ctx, social.AdminMessageFilter{GameID: g.ID, UnreadOnly: true}, 50, 0); len(items) != 0 {
+		t.Errorf("a message to a robot should be born read, but the unread filter listed %d", len(items))
+	}
+	card, err := svc.AdminMessageDetail(ctx, msg.ID)
+	if err != nil {
+		t.Fatalf("detail: %v", err)
+	}
+	for _, s := range card.Seats {
+		if s.AccountID == robot.ID && s.Role != "read" {
+			t.Errorf("robot seat role = %q, want read", s.Role)
+		}
+	}
+}
+
+// TestAdminChatUnreadFilterAndDetail checks the admin unread-only filter and the per-seat read
+// breakdown of the message card.
+func TestAdminChatUnreadFilterAndDetail(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	gameID, seats := newGameWithSeats(t, 2)
+
+	msg, err := svc.PostMessage(ctx, gameID, seats[0], "good luck", "")
+	if err != nil {
+		t.Fatalf("post: %v", err)
+	}
+	// The unread-only filter (scoped to the game) lists the still-unread message.
+	if items, err := svc.AdminListMessages(ctx, social.AdminMessageFilter{GameID: gameID, UnreadOnly: true}, 50, 0); err != nil {
+		t.Fatalf("admin list: %v", err)
+	} else if len(items) != 1 || items[0].ID != msg.ID {
+		t.Fatalf("unread filter = %+v, want the one message", items)
+	}
+	// The detail card marks the sender 'sender' and the recipient 'unread'.
+	card, err := svc.AdminMessageDetail(ctx, msg.ID)
+	if err != nil {
+		t.Fatalf("detail: %v", err)
+	}
+	roles := map[uuid.UUID]string{}
+	for _, s := range card.Seats {
+		roles[s.AccountID] = s.Role
+	}
+	if roles[seats[0]] != "sender" {
+		t.Errorf("sender role = %q, want sender", roles[seats[0]])
+	}
+	if roles[seats[1]] != "unread" {
+		t.Errorf("recipient role = %q, want unread", roles[seats[1]])
+	}
+
+	// After the recipient reads, the filter drops it and the seat flips to 'read'.
+	if _, err := svc.MarkRead(ctx, gameID, seats[1]); err != nil {
+		t.Fatalf("mark read: %v", err)
+	}
+	if items, _ := svc.AdminListMessages(ctx, social.AdminMessageFilter{GameID: gameID, UnreadOnly: true}, 50, 0); len(items) != 0 {
+		t.Errorf("unread filter should be empty after read, got %d", len(items))
+	}
+	card2, err := svc.AdminMessageDetail(ctx, msg.ID)
+	if err != nil {
+		t.Fatalf("detail after read: %v", err)
+	}
+	for _, s := range card2.Seats {
+		if s.AccountID == seats[1] && s.Role != "read" {
+			t.Errorf("recipient role after read = %q, want read", s.Role)
+		}
+	}
+}

backend/internal/inttest/dictionary_update_test.go

@@ -134,11 +134,13 @@ func TestDictionaryUpdateFlow(t *testing.T) {
 // newGameServiceOn builds a game service over the shared pool but a caller-supplied
 // dictionary directory, version and registry, for the isolated dictionary tests.
 func newGameServiceOn(dir, version string, reg *engine.Registry) *game.Service {
-	return game.NewService(
+	svc := game.NewService(
 		game.NewStore(testDB), account.NewStore(testDB), reg,
 		game.Config{DictDir: dir, DictVersion: version, TimeoutSweepInterval: time.Minute, CacheTTL: time.Hour},
 		zap.NewNop(),
 	)
+	svc.SetFirstMoveEntropy(seatZeroFirstMove)
+	return svc
 }
 
 // seedDawgs copies the committed DAWG of every variant from src into dst (flat).

backend/internal/inttest/email_test.go

@@ -6,6 +6,7 @@ import (
 	"context"
 	"errors"
 	"regexp"
+	"slices"
 	"testing"
 	"time"
 
@@ -61,7 +62,7 @@ func TestEmailConfirmFlow(t *testing.T) {
 }
 
 // TestEmailAlreadyTakenByAnotherAccount refuses to bind an email confirmed by a
-// different account (merge is a later stage).
+// different account (combining two accounts is the separate link/merge flow).
 func TestEmailAlreadyTakenByAnotherAccount(t *testing.T) {
 	ctx := context.Background()
 	store := account.NewStore(testDB)
@@ -134,12 +135,20 @@ func TestUpdateProfilePersists(t *testing.T) {
 	store := account.NewStore(testDB)
 	acc := provisionAccount(t)
 
+	// A fresh account defaults to Erudit only (the DB-level column default).
+	if def, err := store.GetByID(ctx, acc); err != nil {
+		t.Fatalf("get default: %v", err)
+	} else if want := []string{"erudit_ru"}; !slices.Equal(def.VariantPreferences, want) {
+		t.Errorf("default variant preferences = %v, want %v", def.VariantPreferences, want)
+	}
+
 	updated, err := store.UpdateProfile(ctx, acc, account.ProfileUpdate{
 		DisplayName:         "Kaya",
 		PreferredLanguage:   "ru",
 		TimeZone:            "Europe/Moscow",
 		BlockChat:           true,
 		BlockFriendRequests: true,
+		VariantPreferences:  []string{"scrabble_en", "erudit_ru"},
 	})
 	if err != nil {
 		t.Fatalf("update profile: %v", err)
@@ -157,6 +166,10 @@ func TestUpdateProfilePersists(t *testing.T) {
 	if reloaded.TimeZone != "Europe/Moscow" || !reloaded.BlockChat {
 		t.Errorf("profile did not persist: %+v", reloaded)
 	}
+	// The text[] column round-trips and is stored canonically (Erudit-first).
+	if want := []string{"erudit_ru", "scrabble_en"}; !slices.Equal(reloaded.VariantPreferences, want) {
+		t.Errorf("variant preferences = %v, want %v", reloaded.VariantPreferences, want)
+	}
 }
 
 // TestUpdateProfileOffsetTimezone checks the UTC-offset timezone: it is
@@ -167,9 +180,10 @@ func TestUpdateProfileOffsetTimezone(t *testing.T) {
 	acc := provisionAccount(t)
 
 	updated, err := store.UpdateProfile(ctx, acc, account.ProfileUpdate{
-		DisplayName:       "Kaya",
-		PreferredLanguage: "en",
-		TimeZone:          "+03:00",
+		DisplayName:        "Kaya",
+		PreferredLanguage:  "en",
+		TimeZone:           "+03:00",
+		VariantPreferences: []string{"erudit_ru"},
 	})
 	if err != nil {
 		t.Fatalf("update with offset timezone: %v", err)
@@ -192,7 +206,7 @@ func TestEmailLoginFlow(t *testing.T) {
 	svc := account.NewEmailService(account.NewStore(testDB), mailer)
 	email := "login-" + uuid.NewString() + "@example.com"
 
-	accountID, err := svc.RequestLoginCode(ctx, email)
+	accountID, err := svc.RequestLoginCode(ctx, email, "+02:00")
 	if err != nil {
 		t.Fatalf("request login code: %v", err)
 	}
@@ -211,12 +225,15 @@ func TestEmailLoginFlow(t *testing.T) {
 	if acc.IsGuest {
 		t.Error("an email account must be durable, not a guest")
 	}
+	if acc.TimeZone != "+02:00" {
+		t.Errorf("TimeZone = %q, want the +02:00 seeded at the request step", acc.TimeZone)
+	}
 	if !identityConfirmed(t, account.KindEmail, email) {
 		t.Error("the email identity must be confirmed after login")
 	}
 
 	// A second login for the same email is the returning user: same account.
-	if _, err := svc.RequestLoginCode(ctx, email); err != nil {
+	if _, err := svc.RequestLoginCode(ctx, email, ""); err != nil {
 		t.Fatalf("second request: %v", err)
 	}
 	acc2, err := svc.LoginWithCode(ctx, email, sixDigit.FindString(mailer.lastBody))

backend/internal/inttest/feedback_test.go

@@ -38,7 +38,7 @@ func latestFeedbackID(t *testing.T, svc *feedback.Service, acc uuid.UUID) uuid.U
 func TestFeedbackGuestRejected(t *testing.T) {
 	svc := newFeedbackService()
 	guest := provisionGuest(t)
-	if err := svc.Submit(context.Background(), guest, "hi", nil, "", "web", "1.2.3.4"); !errors.Is(err, feedback.ErrGuestForbidden) {
+	if err := svc.Submit(context.Background(), guest, "hi", nil, "", "web", "v1", "+05:00", "1.2.3.4"); !errors.Is(err, feedback.ErrGuestForbidden) {
 		t.Fatalf("guest submit err = %v, want ErrGuestForbidden", err)
 	}
 }
@@ -48,11 +48,11 @@ func TestFeedbackSubmitGateAndReplyLifecycle(t *testing.T) {
 	svc := newFeedbackService()
 	acc := provisionAccount(t)
 
-	if err := svc.Submit(ctx, acc, "  please fix the board  ", []byte("PNGDATA"), "shot.png", "ios", "9.9.9.9"); err != nil {
+	if err := svc.Submit(ctx, acc, "  please fix the board  ", []byte("PNGDATA"), "shot.png", "ios", "v1.2.0", "+03:00", "9.9.9.9"); err != nil {
 		t.Fatalf("submit: %v", err)
 	}
 	// Anti-spam gate: a second message is refused while the first is unreviewed.
-	if err := svc.Submit(ctx, acc, "again", nil, "", "web", ""); !errors.Is(err, feedback.ErrPendingReview) {
+	if err := svc.Submit(ctx, acc, "again", nil, "", "web", "", "", ""); !errors.Is(err, feedback.ErrPendingReview) {
 		t.Fatalf("second submit err = %v, want ErrPendingReview", err)
 	}
 	if st, err := svc.State(ctx, acc); err != nil {
@@ -69,7 +69,7 @@ func TestFeedbackSubmitGateAndReplyLifecycle(t *testing.T) {
 	if m.Body != "please fix the board" { // trimmed
 		t.Fatalf("body = %q, want trimmed", m.Body)
 	}
-	if !m.HasAttachment || m.AttachmentName != "shot.png" || m.Channel != "ios" || m.SenderIP != "9.9.9.9" {
+	if !m.HasAttachment || m.AttachmentName != "shot.png" || m.Channel != "ios" || m.SenderIP != "9.9.9.9" || m.Version != "v1.2.0" || m.BrowserTZ != "+03:00" {
 		t.Fatalf("admin message = %+v", m)
 	}
 	if name, data, ok, err := svc.Attachment(ctx, id); err != nil || !ok || name != "shot.png" || string(data) != "PNGDATA" {
@@ -116,7 +116,7 @@ func TestFeedbackReplyHiddenAfterNewMessage(t *testing.T) {
 	acc := provisionAccount(t)
 
 	// msg1, replied → the player can send again and currently sees the reply.
-	if err := svc.Submit(ctx, acc, "first", nil, "", "web", ""); err != nil {
+	if err := svc.Submit(ctx, acc, "first", nil, "", "web", "", "", ""); err != nil {
 		t.Fatalf("submit msg1: %v", err)
 	}
 	if err := svc.Reply(ctx, latestFeedbackID(t, svc, acc), "the answer"); err != nil {
@@ -130,7 +130,7 @@ func TestFeedbackReplyHiddenAfterNewMessage(t *testing.T) {
 
 	// Sending a new message immediately drops the previous reply (it now belongs to an
 	// older message), even though it is well within the one-week window.
-	if err := svc.Submit(ctx, acc, "second", nil, "", "web", ""); err != nil {
+	if err := svc.Submit(ctx, acc, "second", nil, "", "web", "", "", ""); err != nil {
 		t.Fatalf("submit msg2: %v", err)
 	}
 	st, err := svc.State(ctx, acc)
@@ -145,48 +145,33 @@ func TestFeedbackReplyHiddenAfterNewMessage(t *testing.T) {
 	}
 }
 
-func TestFeedbackSnapshotsLanguages(t *testing.T) {
+func TestFeedbackSnapshotsLanguage(t *testing.T) {
 	ctx := context.Background()
 	svc := newFeedbackService()
 	acc := provisionAccount(t)
 	if _, err := testDB.ExecContext(ctx,
-		`UPDATE backend.accounts SET preferred_language = 'en', service_language = 'ru' WHERE account_id = $1`, acc); err != nil {
-		t.Fatalf("set languages: %v", err)
+		`UPDATE backend.accounts SET preferred_language = 'en' WHERE account_id = $1`, acc); err != nil {
+		t.Fatalf("set language: %v", err)
 	}
-	// A Telegram (connector) message snapshots both the interface language and the bot.
-	if err := svc.Submit(ctx, acc, "from telegram", nil, "", "telegram", ""); err != nil {
+	// A message snapshots the sender's interface language at submit time.
+	if err := svc.Submit(ctx, acc, "from telegram", nil, "", "telegram", "", "", ""); err != nil {
 		t.Fatalf("submit: %v", err)
 	}
 	id := latestFeedbackID(t, svc, acc)
 	if m, err := svc.AdminGet(ctx, id); err != nil {
 		t.Fatalf("admin get: %v", err)
-	} else if m.Lang != "en" || m.ChannelLang != "ru" {
-		t.Fatalf("snapshot = lang %q / channel_lang %q, want en / ru", m.Lang, m.ChannelLang)
+	} else if m.Lang != "en" {
+		t.Fatalf("snapshot = lang %q, want en", m.Lang)
 	}
 	// Changing the account afterwards must not change the stored snapshot.
 	if _, err := testDB.ExecContext(ctx,
-		`UPDATE backend.accounts SET preferred_language = 'ru', service_language = 'en' WHERE account_id = $1`, acc); err != nil {
-		t.Fatalf("change languages: %v", err)
+		`UPDATE backend.accounts SET preferred_language = 'ru' WHERE account_id = $1`, acc); err != nil {
+		t.Fatalf("change language: %v", err)
 	}
 	if m, err := svc.AdminGet(ctx, id); err != nil {
 		t.Fatal(err)
-	} else if m.Lang != "en" || m.ChannelLang != "ru" {
-		t.Fatalf("snapshot drifted after account change = lang %q / channel_lang %q", m.Lang, m.ChannelLang)
-	}
-
-	// A non-connector channel records no bot language even when the account has one.
-	acc2 := provisionAccount(t)
-	if _, err := testDB.ExecContext(ctx,
-		`UPDATE backend.accounts SET preferred_language = 'en', service_language = 'ru' WHERE account_id = $1`, acc2); err != nil {
-		t.Fatalf("set languages 2: %v", err)
-	}
-	if err := svc.Submit(ctx, acc2, "from web", nil, "", "web", ""); err != nil {
-		t.Fatalf("submit web: %v", err)
-	}
-	if m, err := svc.AdminGet(ctx, latestFeedbackID(t, svc, acc2)); err != nil {
-		t.Fatal(err)
-	} else if m.Lang != "en" || m.ChannelLang != "" {
-		t.Fatalf("web snapshot = lang %q / channel_lang %q, want en / empty", m.Lang, m.ChannelLang)
+	} else if m.Lang != "en" {
+		t.Fatalf("snapshot drifted after account change = lang %q, want en", m.Lang)
 	}
 }
 
@@ -199,7 +184,7 @@ func TestFeedbackBanRole(t *testing.T) {
 	if err := accounts.GrantRole(ctx, acc, account.RoleFeedbackBanned); err != nil {
 		t.Fatalf("grant role: %v", err)
 	}
-	if err := svc.Submit(ctx, acc, "hi", nil, "", "web", ""); !errors.Is(err, feedback.ErrBanned) {
+	if err := svc.Submit(ctx, acc, "hi", nil, "", "web", "", "", ""); !errors.Is(err, feedback.ErrBanned) {
 		t.Fatalf("banned submit err = %v, want ErrBanned", err)
 	}
 	if st, err := svc.State(ctx, acc); err != nil {
@@ -211,7 +196,7 @@ func TestFeedbackBanRole(t *testing.T) {
 	if err := accounts.RevokeRole(ctx, acc, account.RoleFeedbackBanned); err != nil {
 		t.Fatalf("revoke role: %v", err)
 	}
-	if err := svc.Submit(ctx, acc, "hi again", nil, "", "web", ""); err != nil {
+	if err := svc.Submit(ctx, acc, "hi again", nil, "", "web", "", "", ""); err != nil {
 		t.Fatalf("submit after unban: %v", err)
 	}
 }
@@ -234,7 +219,7 @@ func TestFeedbackValidation(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			acc := provisionAccount(t) // fresh account so the pending gate never fires first
-			if err := svc.Submit(ctx, acc, tt.body, tt.attachment, tt.attachmentName, "web", ""); !errors.Is(err, tt.want) {
+			if err := svc.Submit(ctx, acc, tt.body, tt.attachment, tt.attachmentName, "web", "", "", ""); !errors.Is(err, tt.want) {
 				t.Fatalf("submit err = %v, want %v", err, tt.want)
 			}
 		})
@@ -246,7 +231,7 @@ func TestFeedbackAdminLifecycle(t *testing.T) {
 	svc := newFeedbackService()
 	acc := provisionAccount(t)
 
-	if err := svc.Submit(ctx, acc, "first report", nil, "", "web", ""); err != nil {
+	if err := svc.Submit(ctx, acc, "first report", nil, "", "web", "", "", ""); err != nil {
 		t.Fatalf("submit: %v", err)
 	}
 	id := latestFeedbackID(t, svc, acc)
@@ -291,7 +276,7 @@ func TestFeedbackDeleteAllByAccount(t *testing.T) {
 	svc := newFeedbackService()
 	acc := provisionAccount(t)
 
-	if err := svc.Submit(ctx, acc, "one", nil, "", "web", ""); err != nil {
+	if err := svc.Submit(ctx, acc, "one", nil, "", "web", "", "", ""); err != nil {
 		t.Fatalf("submit: %v", err)
 	}
 	if err := svc.DeleteAllByAccount(ctx, acc); err != nil {
@@ -301,7 +286,7 @@ func TestFeedbackDeleteAllByAccount(t *testing.T) {
 	if has, err := svc.ReplyUnread(ctx, acc); err != nil || has {
 		t.Fatalf("reply unread after delete-all = %v (err %v)", has, err)
 	}
-	if err := svc.Submit(ctx, acc, "fresh", nil, "", "web", ""); err != nil {
+	if err := svc.Submit(ctx, acc, "fresh", nil, "", "web", "", "", ""); err != nil {
 		t.Fatalf("submit after delete-all: %v", err)
 	}
 }

backend/internal/inttest/first_move_draw_test.go

@@ -0,0 +1,154 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/engine"
+	"scrabble/backend/internal/game"
+)
+
+// The first-move-draw suite covers the official seeding (docs/ARCHITECTURE.md §6): the draw is
+// recorded with the game, decides seat 0 (the first mover), and — in auto-match — runs against
+// a synthetic opponent at open time whose draw rows are back-filled when a real opponent joins.
+
+// TestCreateRecordsFirstMoveDraws checks a directly-seated game records the draw against the
+// real seated accounts and seats the drawn leader (the suite's deterministic draw elects the
+// first-listed account) at seat 0.
+func TestCreateRecordsFirstMoveDraws(t *testing.T) {
+	ctx := context.Background()
+	svc := newGameService()
+	a := provisionAccount(t)
+	b := provisionAccount(t)
+	g, err := svc.Create(ctx, game.CreateParams{Variant: engine.VariantEnglish, Seats: []uuid.UUID{a, b}, TurnTimeout: 24 * time.Hour, Seed: 1})
+	if err != nil {
+		t.Fatalf("create: %v", err)
+	}
+	if g.Seats[0].AccountID != a || g.Seats[1].AccountID != b {
+		t.Fatalf("seats = [%s %s], want [a b]", g.Seats[0].AccountID, g.Seats[1].AccountID)
+	}
+	draws, err := svc.SetupDraws(ctx, g.ID)
+	if err != nil {
+		t.Fatalf("setup draws: %v", err)
+	}
+	// seatZeroFirstMove resolves in one round: the first contender (a) draws a blank and wins.
+	if len(draws) != 2 {
+		t.Fatalf("draws = %d, want 2 (one round, two players)", len(draws))
+	}
+	if draws[0].Account != a || !draws[0].Blank {
+		t.Fatalf("draw[0] = %+v, want a having drawn a blank", draws[0])
+	}
+	if draws[1].Account != b {
+		t.Fatalf("draw[1] account = %s, want b", draws[1].Account)
+	}
+}
+
+// TestAutoMatchDrawBackfilledOnJoin checks an open auto-match game records the draw at open
+// time against the synthetic opponent (a NULL account) and back-fills those rows to the real
+// opponent when they join.
+func TestAutoMatchDrawBackfilledOnJoin(t *testing.T) {
+	ctx := context.Background()
+	clearOpenGames(t)
+	svc := newGameService()
+	starter := provisionAccount(t)
+	g := openGame(t, svc, starter, evenOpeningSeed(t))
+
+	draws, err := svc.SetupDraws(ctx, g.ID)
+	if err != nil {
+		t.Fatalf("setup draws: %v", err)
+	}
+	if len(draws) != 2 {
+		t.Fatalf("open draws = %d, want 2", len(draws))
+	}
+	var nullSeen, starterSeen bool
+	for _, d := range draws {
+		switch d.Account {
+		case uuid.Nil:
+			nullSeen = true
+		case starter:
+			starterSeen = true
+		}
+	}
+	if !nullSeen || !starterSeen {
+		t.Fatalf("open draws = %+v, want the starter and a NULL synthetic opponent", draws)
+	}
+
+	joiner := provisionAccount(t)
+	if _, joined, err := svc.OpenOrJoin(ctx, joiner, openParams(0), time.Now().Add(time.Minute), nil); err != nil || !joined {
+		t.Fatalf("join = (joined %v, err %v), want joined", joined, err)
+	}
+	after, err := svc.SetupDraws(ctx, g.ID)
+	if err != nil {
+		t.Fatalf("setup draws after join: %v", err)
+	}
+	for _, d := range after {
+		if d.Account == uuid.Nil {
+			t.Fatalf("draw still NULL after join: %+v", d)
+		}
+		if d.Account != starter && d.Account != joiner {
+			t.Fatalf("draw account %s is neither player", d.Account)
+		}
+	}
+}
+
+// TestReplayTimeline checks the admin replay timeline reconstructs the dealt racks and one
+// played move: the step count, the drawn tiles, the bag remainder, the running score and the
+// turn cursor.
+func TestReplayTimeline(t *testing.T) {
+	ctx := context.Background()
+	svc := newGameService()
+	a := provisionAccount(t)
+	b := provisionAccount(t)
+	seed := evenOpeningSeed(t)
+	g, err := svc.Create(ctx, game.CreateParams{Variant: engine.VariantEnglish, Seats: []uuid.UUID{a, b}, TurnTimeout: 24 * time.Hour, Seed: seed})
+	if err != nil {
+		t.Fatalf("create: %v", err)
+	}
+	hint, ok := newMirror(t, seed, 2).HintView()
+	if !ok || len(hint.Tiles) == 0 {
+		t.Fatal("no opening move for the seed")
+	}
+	if _, err := svc.SubmitPlay(ctx, g.ID, a, hint.Tiles); err != nil {
+		t.Fatalf("play: %v", err)
+	}
+
+	tl, err := svc.ReplayTimeline(ctx, g.ID)
+	if err != nil {
+		t.Fatalf("replay timeline: %v", err)
+	}
+	if len(tl.Steps) != 2 {
+		t.Fatalf("steps = %d, want 2 (deal + one move)", len(tl.Steps))
+	}
+	deal := tl.Steps[0]
+	if deal.Move != nil {
+		t.Fatalf("step 0 must be the deal, got move %+v", deal.Move)
+	}
+	rackSize := len(deal.Racks[0])
+	if rackSize == 0 || len(deal.Racks) != 2 || len(deal.Racks[1]) != rackSize {
+		t.Fatalf("deal racks = %v, want two equal full racks", deal.Racks)
+	}
+	move := tl.Steps[1]
+	if move.Move == nil || move.Move.Action != "play" {
+		t.Fatalf("step 1 move = %+v, want a play", move.Move)
+	}
+	if len(move.Drawn) != len(hint.Tiles) {
+		t.Fatalf("drawn = %v, want %d refilled tiles", move.Drawn, len(hint.Tiles))
+	}
+	if move.BagLen != deal.BagLen-len(hint.Tiles) {
+		t.Fatalf("bag after play = %d, want %d", move.BagLen, deal.BagLen-len(hint.Tiles))
+	}
+	if len(move.Racks[0]) != rackSize {
+		t.Fatalf("mover rack after refill = %d, want %d", len(move.Racks[0]), rackSize)
+	}
+	if move.Scores[0] <= 0 {
+		t.Fatalf("seat 0 score after play = %d, want > 0", move.Scores[0])
+	}
+	if move.ToMove != 1 {
+		t.Fatalf("to_move after seat 0 play = %d, want 1", move.ToMove)
+	}
+}

backend/internal/inttest/game_limit_test.go

@@ -0,0 +1,190 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	"go.uber.org/zap/zaptest"
+
+	"scrabble/backend/internal/account"
+	"scrabble/backend/internal/engine"
+	"scrabble/backend/internal/game"
+	"scrabble/backend/internal/server"
+)
+
+// The game-limit suite covers the simultaneous quick-game cap (game.MaxActiveQuickGames):
+// the counting rule (Store/Service.CountActiveQuickGames) and the HTTP gate that refuses a
+// new game once the cap is reached, while accepting an incoming invitation stays allowed.
+
+// TestCountActiveQuickGames checks the count includes active and open quick games (the
+// honest-AI ones among them) and excludes finished games, friend games (created by
+// invitation) and games the account is not seated in.
+func TestCountActiveQuickGames(t *testing.T) {
+	ctx := context.Background()
+	clearOpenGames(t)
+	games := newGameService()
+	human := provisionAccount(t)
+	opp := provisionAccount(t)
+
+	if n := mustCount(t, games, human); n != 0 {
+		t.Fatalf("fresh account count = %d, want 0", n)
+	}
+
+	// An open (awaiting-opponent) quick game counts.
+	if _, _, err := games.OpenOrJoin(ctx, human, game.CreateParams{
+		Variant: engine.VariantEnglish, TurnTimeout: 24 * time.Hour,
+	}, time.Now().Add(time.Minute), nil); err != nil {
+		t.Fatalf("open quick game: %v", err)
+	}
+	// An active quick game and an honest-AI quick game both count (neither has an invitation row).
+	mustCreateQuick(t, games, []uuid.UUID{human, opp}, false, 1)
+	mustCreateQuick(t, games, []uuid.UUID{human, opp}, true, 2)
+
+	// A finished quick game does NOT count.
+	fin := mustCreateQuick(t, games, []uuid.UUID{human, opp}, false, 3)
+	if _, err := testDB.ExecContext(ctx, `UPDATE backend.games SET status='finished' WHERE game_id=$1`, fin); err != nil {
+		t.Fatalf("finish game: %v", err)
+	}
+	// A game the human is not seated in does NOT count.
+	mustCreateQuick(t, games, []uuid.UUID{opp, provisionAccount(t)}, false, 4)
+	// A friend game (created by invitation) does NOT count, even though it is active.
+	startFriendGame(t, human)
+
+	if n := mustCount(t, games, human); n != 3 {
+		t.Fatalf("active quick count = %d, want 3 (active + AI + open)", n)
+	}
+}
+
+// TestGameLimitGate drives the cap through the assembled HTTP server: under the cap the lobby
+// reports at_game_limit false; at the cap it flips to true and both new-game endpoints (quick
+// enqueue and invitation creation) are refused with 409 game_limit_reached, while accepting an
+// incoming invitation is still allowed.
+func TestGameLimitGate(t *testing.T) {
+	ctx := context.Background()
+	games := newGameService()
+	srv := server.New(":0", server.Deps{
+		Logger:      zaptest.NewLogger(t),
+		DB:          testDB,
+		Accounts:    account.NewStore(testDB),
+		Games:       games,
+		Matchmaker:  newMatchmaker(t, newRobotService(t, newGameService()), time.Minute, 0),
+		Invitations: newInvitationService(),
+	})
+
+	human := provisionAccount(t)
+	opp := provisionAccount(t)
+
+	// Under the cap: the lobby reports the player is not limited.
+	if gamesListAtLimit(t, srv, human) {
+		t.Fatal("a fresh account must be under the game limit")
+	}
+
+	// Reach the cap with active quick games seating the human (no invitation row → quick).
+	for i := 0; i < game.MaxActiveQuickGames; i++ {
+		mustCreateQuick(t, games, []uuid.UUID{human, opp}, false, int64(i+1))
+	}
+
+	// At the cap: the lobby flags it and both create paths are refused with the stable code.
+	if !gamesListAtLimit(t, srv, human) {
+		t.Fatalf("at %d games at_game_limit must be true", game.MaxActiveQuickGames)
+	}
+	// erudit_ru is in the default variant preferences, so the variant gate passes and the
+	// game-limit gate is what fires here.
+	if rec := userPost(t, srv, "/api/v1/user/lobby/enqueue", human, `{"variant":"erudit_ru"}`); rec.Code != http.StatusConflict || errorCode(t, rec) != "game_limit_reached" {
+		t.Fatalf("enqueue at limit = (%d, %q), want (409, game_limit_reached)", rec.Code, errorCode(t, rec))
+	}
+	invBody := fmt.Sprintf(`{"variant":"erudit_ru","invitee_ids":[%q]}`, opp.String())
+	if rec := userPost(t, srv, "/api/v1/user/invitations", human, invBody); rec.Code != http.StatusConflict || errorCode(t, rec) != "game_limit_reached" {
+		t.Fatalf("invitation at limit = (%d, %q), want (409, game_limit_reached)", rec.Code, errorCode(t, rec))
+	}
+
+	// Accepting an incoming invitation is never blocked, even at the cap: another player invites
+	// the capped human, who accepts over HTTP and the game starts (friend games do not count).
+	inviter := provisionAccount(t)
+	inv := newInvitationService()
+	invitation, err := inv.CreateInvitation(ctx, inviter, []uuid.UUID{human}, englishInvite())
+	if err != nil {
+		t.Fatalf("create invitation: %v", err)
+	}
+	if rec := userPost(t, srv, "/api/v1/user/invitations/"+invitation.ID.String()+"/accept", human, ""); rec.Code != http.StatusOK {
+		t.Fatalf("accept at limit = %d (%s), want 200 — accept must bypass the cap", rec.Code, rec.Body.String())
+	}
+}
+
+// mustCount returns the account's active-quick-game count, failing on error.
+func mustCount(t *testing.T, games *game.Service, id uuid.UUID) int {
+	t.Helper()
+	n, err := games.CountActiveQuickGames(context.Background(), id)
+	if err != nil {
+		t.Fatalf("count active quick games: %v", err)
+	}
+	return n
+}
+
+// mustCreateQuick creates an active quick game (no invitation) seating the given accounts and
+// returns its id; vsAI flags an honest-AI game (the service then applies the 7-day clock).
+func mustCreateQuick(t *testing.T, games *game.Service, seats []uuid.UUID, vsAI bool, seed int64) uuid.UUID {
+	t.Helper()
+	p := game.CreateParams{Variant: engine.VariantEnglish, Seats: seats, TurnTimeout: 24 * time.Hour, Seed: seed}
+	if vsAI {
+		p.VsAI = true
+		p.TurnTimeout = 0 // the service applies the 7-day AI inactivity clock for vs_ai games
+	}
+	g, err := games.Create(context.Background(), p)
+	if err != nil {
+		t.Fatalf("create quick game (vsAI=%v): %v", vsAI, err)
+	}
+	return g.ID
+}
+
+// startFriendGame has a fresh inviter invite the given account to a friend game and the invitee
+// accept it, so the (active) friend game exists with its game_invitations row.
+func startFriendGame(t *testing.T, invitee uuid.UUID) {
+	t.Helper()
+	ctx := context.Background()
+	inv := newInvitationService()
+	inviter := provisionAccount(t)
+	invitation, err := inv.CreateInvitation(ctx, inviter, []uuid.UUID{invitee}, englishInvite())
+	if err != nil {
+		t.Fatalf("create invitation: %v", err)
+	}
+	if _, err := inv.RespondInvitation(ctx, invitation.ID, invitee, true); err != nil {
+		t.Fatalf("accept invitation: %v", err)
+	}
+}
+
+// gamesListAtLimit fetches /api/v1/user/games and returns its at_game_limit flag.
+func gamesListAtLimit(t *testing.T, srv *server.Server, id uuid.UUID) bool {
+	t.Helper()
+	rec := userGet(t, srv, "/api/v1/user/games", id)
+	if rec.Code != http.StatusOK {
+		t.Fatalf("games.list status = %d, want 200", rec.Code)
+	}
+	var body struct {
+		AtGameLimit bool `json:"at_game_limit"`
+	}
+	if err := json.Unmarshal(rec.Body.Bytes(), &body); err != nil {
+		t.Fatalf("decode games.list: %v", err)
+	}
+	return body.AtGameLimit
+}
+
+// userPost issues an authenticated JSON POST (X-User-ID) against the assembled server.
+func userPost(t *testing.T, srv *server.Server, path string, id uuid.UUID, body string) *httptest.ResponseRecorder {
+	t.Helper()
+	rec := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodPost, path, strings.NewReader(body))
+	req.Header.Set("X-User-ID", id.String())
+	req.Header.Set("Content-Type", "application/json")
+	srv.Handler().ServeHTTP(rec, req)
+	return rec
+}

backend/internal/inttest/game_test.go

@@ -11,6 +11,7 @@ import (
 
 	"github.com/google/uuid"
 
+	"scrabble/backend/internal/account"
 	"scrabble/backend/internal/engine"
 	"scrabble/backend/internal/game"
 )
@@ -120,8 +121,8 @@ func TestGameLifecycleAndStats(t *testing.T) {
 		t.Fatalf("final game not finished: %+v", last.Game)
 	}
 
-	w0, l0, d0, mg0, _, ok0 := readStats(t, seats[0])
-	w1, l1, d1, mg1, _, ok1 := readStats(t, seats[1])
+	w0, l0, d0, mg0, mw0, ok0 := readStats(t, seats[0])
+	w1, l1, d1, mg1, mw1, ok1 := readStats(t, seats[1])
 	if !ok0 || !ok1 {
 		t.Fatal("both players must have a stats row")
 	}
@@ -133,6 +134,52 @@ func TestGameLifecycleAndStats(t *testing.T) {
 	if !decisive && !draw {
 		t.Errorf("inconsistent W/L/D: p0(%d/%d/%d) p1(%d/%d/%d)", w0, l0, d0, w1, l1, d1)
 	}
+
+	// Each player who made a scoring play gets exactly one per-variant best move (only
+	// scrabble_en was played here); its score equals the aggregate max_word_points and it
+	// carries the decoded word as tiles.
+	accounts := account.NewStore(testDB)
+	for _, p := range []struct {
+		id      uuid.UUID
+		maxWord int
+	}{{seats[0], mw0}, {seats[1], mw1}} {
+		if p.maxWord == 0 {
+			continue // a player who only passed has no best move
+		}
+		st, err := accounts.GetStats(ctx, p.id)
+		if err != nil {
+			t.Fatalf("get stats: %v", err)
+		}
+		// The player made at least one scoring play (maxWord > 0), so the moves aggregate is
+		// positive; no hints were taken in this greedy game, so the hints aggregate stays 0.
+		if st.Moves <= 0 {
+			t.Errorf("moves = %d, want > 0", st.Moves)
+		}
+		if st.HintsUsed != 0 {
+			t.Errorf("hints used = %d, want 0 (no hints taken)", st.HintsUsed)
+		}
+		if len(st.BestMoves) != 1 {
+			t.Fatalf("want one best move (only scrabble_en played), got %d: %+v", len(st.BestMoves), st.BestMoves)
+		}
+		bm := st.BestMoves[0]
+		if bm.Variant != engine.VariantEnglish.String() {
+			t.Errorf("best move variant = %q, want %q", bm.Variant, engine.VariantEnglish.String())
+		}
+		if bm.Score != p.maxWord {
+			t.Errorf("best move score %d != max_word_points %d", bm.Score, p.maxWord)
+		}
+		if len(bm.Tiles) == 0 {
+			t.Error("best move word is empty")
+		}
+		for _, tl := range bm.Tiles {
+			if tl.Letter == "" {
+				t.Error("best move tile has empty letter")
+			}
+			if tl.Blank && tl.Value != 0 {
+				t.Errorf("blank tile must score 0, got %d", tl.Value)
+			}
+		}
+	}
 }
 
 // TestReplayEquivalence plays a few moves through one service, then proves a
@@ -369,6 +416,15 @@ func TestHintPolicy(t *testing.T) {
 	if _, err := svc.Hint(ctx, g.ID, seats[0]); err != nil { // spends the allowance
 		t.Fatalf("first hint: %v", err)
 	}
+	// The allowance is spent before the wallet: with an empty wallet, the state now reports no
+	// hints left and a zero wallet, so the per-game allowance (HintsRemaining-WalletBalance) is 0.
+	st, err := svc.GameState(ctx, g.ID, seats[0])
+	if err != nil {
+		t.Fatalf("state: %v", err)
+	}
+	if st.HintsRemaining != 0 || st.WalletBalance != 0 {
+		t.Errorf("after allowance hint: hints=%d wallet=%d, want 0/0", st.HintsRemaining, st.WalletBalance)
+	}
 	if _, err := svc.Hint(ctx, g.ID, seats[0]); !errors.Is(err, game.ErrNoHintsLeft) {
 		t.Fatalf("second hint = %v, want ErrNoHintsLeft", err)
 	}
@@ -377,8 +433,18 @@ func TestHintPolicy(t *testing.T) {
 	if err != nil {
 		t.Fatalf("wallet hint: %v", err)
 	}
-	if res.HintsRemaining != 1 {
-		t.Errorf("hints remaining = %d, want 1", res.HintsRemaining)
+	// The allowance stays exhausted; the wallet dropped 2->1, and WalletBalance carries it alone.
+	if res.HintsRemaining != 1 || res.WalletBalance != 1 {
+		t.Errorf("wallet hint: hints=%d wallet=%d, want 1/1", res.HintsRemaining, res.WalletBalance)
+	}
+	// game_players.hints_used counts BOTH hints (1 allowance + 1 wallet) — the per-game total
+	// that feeds the player's lifetime hint statistics, not just the allowance.
+	st2, err := svc.GameState(ctx, g.ID, seats[0])
+	if err != nil {
+		t.Fatalf("state after wallet hint: %v", err)
+	}
+	if got := st2.Game.Seats[0].HintsUsed; got != 2 {
+		t.Errorf("hints_used = %d after allowance + wallet hint, want 2", got)
 	}
 
 	off, err := svc.Create(ctx, game.CreateParams{
@@ -477,6 +543,12 @@ func TestEvaluatePlayPreview(t *testing.T) {
 	if bad.Valid {
 		t.Error("disconnected play must be invalid")
 	}
+
+	// A non-seated account cannot preview: with the game warm in the live cache, the
+	// membership check runs against the cached seat list (the hot path that skips GetGame).
+	if _, err := svc.EvaluatePlay(ctx, g.ID, provisionAccount(t), hint.Tiles); !errors.Is(err, game.ErrNotAPlayer) {
+		t.Errorf("evaluate by a non-player = %v, want ErrNotAPlayer", err)
+	}
 }
 
 // TestConcurrentSubmitSerialized confirms the per-game lock lets only one of two

backend/internal/inttest/helpers.go

@@ -26,9 +26,10 @@ import (
 // assembly, and the stats reader. Helpers used by a single test file stay in
 // that file; everything reused across files lives here.
 
-// newGameService builds a game service over the shared pool and registry.
+// newGameService builds a game service over the shared pool and registry, with a
+// deterministic first-move draw so the suite keeps a stable turn order.
 func newGameService() *game.Service {
-	return game.NewService(
+	svc := game.NewService(
 		game.NewStore(testDB),
 		account.NewStore(testDB),
 		testRegistry,
@@ -40,6 +41,39 @@ func newGameService() *game.Service {
 		},
 		zap.NewNop(),
 	)
+	svc.SetFirstMoveEntropy(seatZeroFirstMove)
+	return svc
+}
+
+// seatZeroFirstMove is a first-move-draw entropy factory that always elects the first
+// listed account as the leader, keeping the integration suite's turn order stable
+// despite the real draw's randomness: the first contender draws a blank — the best
+// possible tile — and wins outright, the rest draw the first remaining tile. It is a
+// factory so each game restarts the one-shot "blank" pick.
+func seatZeroFirstMove() func(n int) (int, error) {
+	first := true
+	return func(n int) (int, error) {
+		if first {
+			first = false
+			return n - 1, nil // a blank sits last in the bag → best rank
+		}
+		return 0, nil
+	}
+}
+
+// seatOneFirstMove is a first-move-draw entropy factory that elects the second contender (in
+// auto-match, the synthetic opponent) as the leader, so the caller is seated at seat 1: the
+// first contender draws the first remaining tile and the second draws a blank, winning.
+func seatOneFirstMove() func(n int) (int, error) {
+	pick := 0
+	return func(n int) (int, error) {
+		i := 0
+		if pick == 1 {
+			i = n - 1 // the second contender draws a blank → best rank
+		}
+		pick++
+		return i, nil
+	}
 }
 
 // newSocialService builds a social service over the shared pool, reading game
@@ -86,7 +120,7 @@ func provisionAccount(t *testing.T) uuid.UUID {
 // provisionGuest creates a fresh ephemeral guest account and returns its id.
 func provisionGuest(t *testing.T) uuid.UUID {
 	t.Helper()
-	acc, err := account.NewStore(testDB).ProvisionGuest(context.Background())
+	acc, err := account.NewStore(testDB).ProvisionGuest(context.Background(), "")
 	if err != nil {
 		t.Fatalf("provision guest: %v", err)
 	}

backend/internal/inttest/lobby_filter_test.go

@@ -0,0 +1,134 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/engine"
+	"scrabble/backend/internal/game"
+)
+
+// TestListForLobbyDropsLeftAIGames covers the lobby filter (game.Service.ListForLobby): a
+// finished honest-AI game the player left — by resigning or by abandoning to the inactivity
+// timeout — drops out of the lobby list, while it stays in ListForAccount so the admin console
+// and the account-merge count keep the full set. A normally finished AI game, an active AI game
+// and a left human game all stay in the lobby. The drop is a game property, not a per-resigner
+// one, so it leaves every seat's lobby.
+func TestListForLobbyDropsLeftAIGames(t *testing.T) {
+	ctx := context.Background()
+	svc := newGameService()
+
+	createAI := func(t *testing.T) (uuid.UUID, []uuid.UUID) {
+		t.Helper()
+		seats := []uuid.UUID{provisionAccount(t), provisionAccount(t)}
+		g, err := svc.Create(ctx, game.CreateParams{
+			Variant: engine.VariantEnglish, Seats: seats, TurnTimeout: time.Hour, Seed: 1, VsAI: true,
+		})
+		if err != nil {
+			t.Fatalf("create AI game: %v", err)
+		}
+		return g.ID, seats
+	}
+
+	t.Run("resign dropped from lobby, kept in account list", func(t *testing.T) {
+		gid, seats := createAI(t)
+		me := seats[0]
+		res, err := svc.Resign(ctx, gid, me)
+		if err != nil {
+			t.Fatalf("resign: %v", err)
+		}
+		if res.Game.EndReason != "resign" {
+			t.Fatalf("end reason = %q, want resign", res.Game.EndReason)
+		}
+		if lobbyHas(t, svc, me, gid) {
+			t.Error("resigned AI game still in the lobby list")
+		}
+		if !containsGame(t, svc, me, gid) {
+			t.Error("resigned AI game missing from the full account list (the row must stay)")
+		}
+		if lobbyHas(t, svc, seats[1], gid) {
+			t.Error("resigned AI game still in the opponent's lobby list (drop is per-game)")
+		}
+	})
+
+	t.Run("timeout dropped from lobby", func(t *testing.T) {
+		gid, seats := createAI(t)
+		me := seats[0] // seat 0 is to move and will be timed out
+		// Disable the away window so the sweep is deterministic regardless of wall clock.
+		setAway(t, me, "UTC", "00:00", "00:00")
+		backdate(t, gid, time.Now().UTC().Add(-(game.AIInactivityTimeout + 2*time.Hour)))
+		if n, err := svc.SweepTimeouts(ctx, time.Now().UTC()); err != nil || n < 1 {
+			t.Fatalf("sweep swept %d (err %v), want >= 1", n, err)
+		}
+		if status, reason := gameStatus(t, svc, gid); status != game.StatusFinished || reason != "timeout" {
+			t.Fatalf("game not timed out: status %q reason %q", status, reason)
+		}
+		if lobbyHas(t, svc, me, gid) {
+			t.Error("abandoned (timed-out) AI game still in the lobby list")
+		}
+	})
+
+	t.Run("active AI game stays in lobby", func(t *testing.T) {
+		gid, seats := createAI(t)
+		if !lobbyHas(t, svc, seats[0], gid) {
+			t.Error("active AI game missing from the lobby list")
+		}
+	})
+
+	t.Run("normally finished AI game stays in lobby", func(t *testing.T) {
+		gid, seats := createAI(t)
+		var fin game.MoveResult
+		for i := 0; i < 8; i++ { // six consecutive passes end the game scoreless
+			r, err := svc.Pass(ctx, gid, seats[i%2])
+			if err != nil {
+				t.Fatalf("pass %d: %v", i, err)
+			}
+			fin = r
+			if r.Game.Status == game.StatusFinished {
+				break
+			}
+		}
+		if fin.Game.Status != game.StatusFinished || fin.Game.EndReason != "scoreless" {
+			t.Fatalf("AI game not scoreless-finished: status %q reason %q", fin.Game.Status, fin.Game.EndReason)
+		}
+		if !lobbyHas(t, svc, seats[0], gid) {
+			t.Error("normally finished AI game must stay in the lobby list")
+		}
+	})
+
+	t.Run("left human game stays in lobby", func(t *testing.T) {
+		seats := []uuid.UUID{provisionAccount(t), provisionAccount(t)}
+		g, err := svc.Create(ctx, game.CreateParams{
+			Variant: engine.VariantEnglish, Seats: seats, TurnTimeout: 24 * time.Hour, Seed: 1,
+		})
+		if err != nil {
+			t.Fatalf("create human game: %v", err)
+		}
+		if _, err := svc.Resign(ctx, g.ID, seats[0]); err != nil {
+			t.Fatalf("resign: %v", err)
+		}
+		if !lobbyHas(t, svc, seats[0], g.ID) {
+			t.Error("resigned human game must stay in the lobby list (only AI games are dropped)")
+		}
+	})
+}
+
+// lobbyHas reports whether the account's own lobby list (ListForLobby) includes gameID.
+func lobbyHas(t *testing.T, svc *game.Service, accountID, gameID uuid.UUID) bool {
+	t.Helper()
+	games, err := svc.ListForLobby(context.Background(), accountID)
+	if err != nil {
+		t.Fatalf("list for lobby: %v", err)
+	}
+	for _, g := range games {
+		if g.ID == gameID {
+			return true
+		}
+	}
+	return false
+}

backend/internal/inttest/lobby_test.go

@@ -74,9 +74,11 @@ func TestMatchmakingOpensThenJoins(t *testing.T) {
 	}
 }
 
-// TestMatchmakingReEnqueueReturnsOwnOpenGame checks a re-enqueue is idempotent: the
-// caller gets their existing open game rather than a second one.
-func TestMatchmakingReEnqueueReturnsOwnOpenGame(t *testing.T) {
+// TestMatchmakingReEnqueueOpensNewGame checks a re-enqueue opens a fresh open game
+// rather than returning the caller's existing one: tapping "random opponent" again while
+// still waiting starts a new search instead of bouncing the player back into the pending
+// game. Both games stay open until an opponent (a human or the reaper's robot) joins each.
+func TestMatchmakingReEnqueueOpensNewGame(t *testing.T) {
 	ctx := context.Background()
 	clearOpenGames(t)
 	mm := newMatchmaker(t, newRobotService(t, newGameService()), 90*time.Second, 90*time.Second)
@@ -90,8 +92,13 @@ func TestMatchmakingReEnqueueReturnsOwnOpenGame(t *testing.T) {
 	if err != nil {
 		t.Fatalf("re-enqueue: %v", err)
 	}
-	if r2.Game.ID != r1.Game.ID || r2.Matched {
-		t.Fatalf("re-enqueue = (game %s, matched %v), want the same open game %s unmatched", r2.Game.ID, r2.Matched, r1.Game.ID)
+	if r2.Matched || r2.Game.ID == r1.Game.ID {
+		t.Fatalf("re-enqueue = (game %s, matched %v), want a new open game distinct from %s, unmatched", r2.Game.ID, r2.Matched, r1.Game.ID)
+	}
+	for _, g := range []uuid.UUID{r1.Game.ID, r2.Game.ID} {
+		if _, _, status, err := newGameService().Participants(ctx, g); err != nil || status != "open" {
+			t.Fatalf("game %s status = %q err %v, want open", g, status, err)
+		}
 	}
 }
 
@@ -191,14 +198,36 @@ func TestInvitationLazyExpiry(t *testing.T) {
 func TestInvitationBlockedInvitee(t *testing.T) {
 	ctx := context.Background()
 	svc := newInvitationService()
-	social := newSocialService()
+	pub := &capturePublisher{}
+	svc.SetNotifier(pub)
+	soc := newSocialService()
+
+	// The inviter has blocked an invitee: the invitation is refused outright (the inviter is aware).
 	inviter := provisionAccount(t)
-	invitee := provisionAccount(t)
-	if err := social.Block(ctx, invitee, inviter); err != nil {
+	blockedInvitee := provisionAccount(t)
+	if err := soc.Block(ctx, inviter, blockedInvitee); err != nil {
 		t.Fatalf("block: %v", err)
 	}
-	if _, err := svc.CreateInvitation(ctx, inviter, []uuid.UUID{invitee}, englishInvite()); !errors.Is(err, lobby.ErrInvitationBlocked) {
-		t.Fatalf("create blocked = %v, want ErrInvitationBlocked", err)
+	if _, err := svc.CreateInvitation(ctx, inviter, []uuid.UUID{blockedInvitee}, englishInvite()); !errors.Is(err, lobby.ErrInvitationBlocked) {
+		t.Fatalf("create with a blocked invitee = %v, want ErrInvitationBlocked", err)
+	}
+
+	// An invitee who has blocked the inviter is instead suppressed: the invitation is created
+	// (no error — the inviter notices nothing), but that invitee is never notified and never
+	// sees it in their list.
+	inviter2 := provisionAccount(t)
+	suppressed := provisionAccount(t)
+	if err := soc.Block(ctx, suppressed, inviter2); err != nil {
+		t.Fatalf("block: %v", err)
+	}
+	if _, err := svc.CreateInvitation(ctx, inviter2, []uuid.UUID{suppressed}, englishInvite()); err != nil {
+		t.Fatalf("create with a suppressing invitee = %v, want nil", err)
+	}
+	if pub.notified(suppressed, notify.NotifyInvitation) {
+		t.Error("an invitee who blocked the inviter must not be notified of the invitation")
+	}
+	if list, _ := svc.ListInvitations(ctx, suppressed); len(list) != 0 {
+		t.Errorf("suppressed invitee's invitation list = %v, want empty", list)
 	}
 }
 

backend/internal/inttest/merge_test.go

@@ -30,6 +30,34 @@ func setStats(t *testing.T, id uuid.UUID, w, l, d, mg, mw int) {
 	}
 }
 
+func setStatsCounts(t *testing.T, id uuid.UUID, moves, hints int) {
+	t.Helper()
+	if _, err := testDB.ExecContext(context.Background(),
+		`UPDATE backend.account_stats SET moves=$2, hints_used=$3 WHERE account_id=$1`, id, moves, hints); err != nil {
+		t.Fatalf("set stats counts: %v", err)
+	}
+}
+
+func setBestMove(t *testing.T, id uuid.UUID, variant string, score int) {
+	t.Helper()
+	tiles := `[{"letter":"c","value":3,"blank":false}]`
+	if _, err := testDB.ExecContext(context.Background(),
+		`INSERT INTO backend.account_best_move (account_id, variant, score, tiles) VALUES ($1,$2,$3,$4)
+		 ON CONFLICT (account_id, variant) DO UPDATE SET score=$3, tiles=$4`, id, variant, score, tiles); err != nil {
+		t.Fatalf("set best move: %v", err)
+	}
+}
+
+func bestMoveCount(t *testing.T, id uuid.UUID) int {
+	t.Helper()
+	var n int
+	if err := testDB.QueryRowContext(context.Background(),
+		`SELECT count(*) FROM backend.account_best_move WHERE account_id=$1`, id).Scan(&n); err != nil {
+		t.Fatalf("best move count: %v", err)
+	}
+	return n
+}
+
 func setWallet(t *testing.T, id uuid.UUID, hints int, paid bool) {
 	t.Helper()
 	if _, err := testDB.ExecContext(context.Background(),
@@ -110,8 +138,15 @@ func TestAccountMergeCore(t *testing.T) {
 
 	setStats(t, primary, 1, 0, 0, 100, 90)
 	setStats(t, secondary, 3, 1, 2, 400, 80)
+	setStatsCounts(t, primary, 100, 5)
+	setStatsCounts(t, secondary, 50, 8)
 	setWallet(t, primary, 2, false)
 	setWallet(t, secondary, 5, true)
+	// Best moves: secondary's scrabble_en (80) beats primary's (50) and is kept; secondary's
+	// scrabble_ru (30) is new to primary and carried over.
+	setBestMove(t, primary, "scrabble_en", 50)
+	setBestMove(t, secondary, "scrabble_en", 80)
+	setBestMove(t, secondary, "scrabble_ru", 30)
 
 	email := "merge-" + uuid.NewString() + "@example.com"
 	bindEmailIdentity(t, secondary, email)
@@ -153,6 +188,26 @@ func TestAccountMergeCore(t *testing.T) {
 	if mergedInto(t, secondary) != primary {
 		t.Errorf("secondary.merged_into = %s, want primary %s", mergedInto(t, secondary), primary)
 	}
+
+	// The moves/hints counters sum, and the per-variant best moves merge (the higher score
+	// per variant kept), with the secondary's best-move rows cleaned up.
+	st, err := store.GetStats(ctx, primary)
+	if err != nil {
+		t.Fatalf("get merged stats: %v", err)
+	}
+	if st.Moves != 150 || st.HintsUsed != 13 {
+		t.Errorf("primary moves/hints = %d/%d, want 150/13", st.Moves, st.HintsUsed)
+	}
+	best := map[string]int{}
+	for _, b := range st.BestMoves {
+		best[b.Variant] = b.Score
+	}
+	if len(st.BestMoves) != 2 || best["scrabble_en"] != 80 || best["scrabble_ru"] != 30 {
+		t.Errorf("primary best moves = %+v, want scrabble_en:80 + scrabble_ru:30", st.BestMoves)
+	}
+	if bestMoveCount(t, secondary) != 0 {
+		t.Error("secondary best-move rows should be deleted after merge")
+	}
 }
 
 // TestAccountMergeActiveGameConflict refuses a merge when the two share an active

backend/internal/inttest/open_match_test.go

@@ -18,8 +18,9 @@ import (
 // The open-game suite covers an auto-match game that a player enters immediately and
 // waits inside (status 'open', the opponent seat empty) until a human or a robot joins.
 
-// evenOpeningSeed returns an even seed (so OpenOrJoin seats the starter at seat 0, which
-// moves first) whose fresh two-player English opening rack has a legal move.
+// evenOpeningSeed returns a seed whose fresh two-player English opening rack (seat 0) has a
+// legal move, for tests that drive or attempt an opening play. It scans even seeds; seat
+// order no longer depends on the seed — the first-move draw decides it (docs/ARCHITECTURE.md §6).
 func evenOpeningSeed(t *testing.T) int64 {
 	t.Helper()
 	for seed := int64(2); seed <= 400; seed += 2 {
@@ -49,7 +50,7 @@ func openParams(seed int64) game.CreateParams {
 
 func openGame(t *testing.T, svc *game.Service, starter uuid.UUID, seed int64) game.Game {
 	t.Helper()
-	g, joined, err := svc.OpenOrJoin(context.Background(), starter, openParams(seed), time.Now().Add(time.Minute))
+	g, joined, err := svc.OpenOrJoin(context.Background(), starter, openParams(seed), time.Now().Add(time.Minute), nil)
 	if err != nil {
 		t.Fatalf("open game: %v", err)
 	}
@@ -59,9 +60,9 @@ func openGame(t *testing.T, svc *game.Service, starter uuid.UUID, seed int64) ga
 	return g
 }
 
-// TestOpenGameStarterMovesThenWaits checks the starter (seat 0) may move on their turn
-// while the game is open, after which it is the empty opponent seat's turn and the
-// starter just waits.
+// TestOpenGameStarterMovesThenWaits checks the starter may move on their turn while the game
+// is open (the first-move draw, run when the game opened, put them at seat 0), after which it
+// is the empty opponent seat's turn and the starter just waits.
 func TestOpenGameStarterMovesThenWaits(t *testing.T) {
 	ctx := context.Background()
 	clearOpenGames(t)
@@ -89,28 +90,30 @@ func TestOpenGameStarterMovesThenWaits(t *testing.T) {
 	}
 }
 
-// TestOpenGameStarterWaitsWhenOpponentMovesFirst checks that when the starter is seated
-// at seat 1 (odd seed), the still-empty seat 0 is to move, so the starter cannot act.
+// TestOpenGameStarterWaitsWhenOpponentMovesFirst checks that when the first-move draw seats
+// the starter at seat 1 (the synthetic opponent won the open draw), the still-empty seat 0 is
+// to move, so the starter cannot act until an opponent fills it.
 func TestOpenGameStarterWaitsWhenOpponentMovesFirst(t *testing.T) {
 	ctx := context.Background()
 	clearOpenGames(t)
 	svc := newGameService()
+	svc.SetFirstMoveEntropy(seatOneFirstMove) // the synthetic opponent wins → the caller sits at seat 1
 	starter := provisionAccount(t)
-	g, _, err := svc.OpenOrJoin(ctx, starter, openParams(1), time.Now().Add(time.Minute))
+	g, _, err := svc.OpenOrJoin(ctx, starter, openParams(1), time.Now().Add(time.Minute), nil)
 	if err != nil {
 		t.Fatalf("open: %v", err)
 	}
 	if g.ToMove != 0 || g.Seats[0].AccountID != uuid.Nil {
-		t.Fatalf("odd-seed open game: to_move %d seat0 %s, want the empty seat 0 to move", g.ToMove, g.Seats[0].AccountID)
+		t.Fatalf("opponent-won open draw: to_move %d seat0 %s, want the empty seat 0 to move", g.ToMove, g.Seats[0].AccountID)
 	}
 	if _, err := svc.Pass(ctx, g.ID, starter); !errors.Is(err, game.ErrNotYourTurn) {
 		t.Fatalf("starter acting on the empty seat's turn = %v, want ErrNotYourTurn", err)
 	}
 }
 
-// TestOpenGameJoinAfterStarterMoved checks a second human joins an open game even after
-// the starter has already made their first move, landing on the board mid-opening and
-// able to act on their turn.
+// TestOpenGameJoinAfterStarterMoved checks a second human joins an open game even after the
+// starter has already made their first move: the seats were fixed by the draw at open, so the
+// joiner takes the empty seat without disturbing the journal, and can act on their turn.
 func TestOpenGameJoinAfterStarterMoved(t *testing.T) {
 	ctx := context.Background()
 	clearOpenGames(t)
@@ -128,7 +131,7 @@ func TestOpenGameJoinAfterStarterMoved(t *testing.T) {
 	}
 
 	joiner := provisionAccount(t)
-	g2, joined, err := svc.OpenOrJoin(ctx, joiner, openParams(0), time.Now().Add(time.Minute))
+	g2, joined, err := svc.OpenOrJoin(ctx, joiner, openParams(0), time.Now().Add(time.Minute), nil)
 	if err != nil {
 		t.Fatalf("join: %v", err)
 	}
@@ -161,11 +164,11 @@ func TestOpenGameResignRejectedUntilOpponent(t *testing.T) {
 		t.Fatalf("resign while open = %v, want ErrNoOpponentYet", err)
 	}
 
-	robotID, err := robots.Pick(engine.VariantEnglish)
+	robotID, name, err := robots.PickNamed(engine.VariantEnglish)
 	if err != nil {
 		t.Fatalf("pick: %v", err)
 	}
-	if _, attached, err := svc.AttachRobot(ctx, g.ID, robotID); err != nil || !attached {
+	if _, attached, err := svc.AttachRobot(ctx, g.ID, robotID, name); err != nil || !attached {
 		t.Fatalf("attach robot = (attached %v, err %v), want attached", attached, err)
 	}
 	res, err := svc.Resign(ctx, g.ID, starter)

backend/internal/inttest/robot_friend_test.go

@@ -0,0 +1,82 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/account"
+	"scrabble/backend/internal/engine"
+	"scrabble/backend/internal/game"
+)
+
+// TestRobotFriendRequestIsPerGameAndReaped checks that sending a friend request to a
+// disguised-robot opponent is recorded per-game in robot_friend_requests — never in the
+// friendships table or against the shared robot account — that a re-send is idempotent, and
+// that the reaper deletes the row once its game has been finished past the retention window
+// while keeping the row for an active game.
+func TestRobotFriendRequestIsPerGameAndReaped(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	accs := account.NewStore(testDB)
+	human := provisionAccount(t)
+	robot, err := accs.ProvisionRobot(ctx, "robot-friend-"+uuid.NewString(), "Robbie")
+	if err != nil {
+		t.Fatalf("provision robot: %v", err)
+	}
+	g, err := newGameService().Create(ctx, game.CreateParams{
+		Variant: engine.VariantEnglish, Seats: []uuid.UUID{human, robot.ID},
+		TurnTimeout: 24 * time.Hour, Seed: openingSeed(t),
+	})
+	if err != nil {
+		t.Fatalf("create game: %v", err)
+	}
+
+	if err := svc.RequestInGame(ctx, human, robot.ID, g.ID); err != nil {
+		t.Fatalf("request robot: %v", err)
+	}
+	rfr, err := svc.ListRobotFriendRequests(ctx, human)
+	if err != nil {
+		t.Fatalf("list robot friend requests: %v", err)
+	}
+	if len(rfr) != 1 || rfr[0].GameID != g.ID || rfr[0].Seat != 1 {
+		t.Fatalf("robot friend requests = %v, want one for game %s seat 1", rfr, g.ID)
+	}
+	// The friendships table must stay empty: no outgoing request against the shared robot account.
+	if out, _ := svc.ListOutgoingRequests(ctx, human); len(out) != 0 {
+		t.Errorf("friendships outgoing must be empty for a robot request, got %v", out)
+	}
+
+	// A re-send to the same game+seat is idempotent (the UNIQUE constraint collapses it).
+	if err := svc.RequestInGame(ctx, human, robot.ID, g.ID); err != nil {
+		t.Fatalf("re-request robot: %v", err)
+	}
+	if rfr, _ := svc.ListRobotFriendRequests(ctx, human); len(rfr) != 1 {
+		t.Fatalf("re-request must not duplicate, got %v", rfr)
+	}
+
+	// While the game is active the reaper keeps the row.
+	if n, err := svc.ReapExpiredRobotFriendRequests(ctx); err != nil || n != 0 {
+		t.Fatalf("reap on active game = (%d, %v), want (0, nil)", n, err)
+	}
+	if rfr, _ := svc.ListRobotFriendRequests(ctx, human); len(rfr) != 1 {
+		t.Fatalf("active-game request must survive the reaper, got %v", rfr)
+	}
+
+	// Finish the game well past the retention window: the reaper now deletes the row.
+	finished := time.Now().UTC().Add(-8 * 24 * time.Hour)
+	if _, err := testDB.ExecContext(ctx,
+		`UPDATE backend.games SET status='finished', finished_at=$1 WHERE game_id=$2`, finished, g.ID); err != nil {
+		t.Fatalf("finish game: %v", err)
+	}
+	if n, err := svc.ReapExpiredRobotFriendRequests(ctx); err != nil || n != 1 {
+		t.Fatalf("reap on long-finished game = (%d, %v), want (1, nil)", n, err)
+	}
+	if rfr, _ := svc.ListRobotFriendRequests(ctx, human); len(rfr) != 0 {
+		t.Errorf("long-finished request not reaped: %v", rfr)
+	}
+}

backend/internal/inttest/robot_test.go

@@ -181,8 +181,8 @@ func TestMatchmakerSubstitutesRobotEndToEnd(t *testing.T) {
 	}
 }
 
-// TestRobotProactiveNudge checks the robot's lengthening proactive-nudge schedule on the
-// human's turn: nothing before the ~60-90 min first gap, exactly one once it has elapsed.
+// TestRobotProactiveNudge checks the robot's flat proactive-nudge schedule on the human's
+// turn: nothing before the 9 h floor of the 9-12 h gap, exactly one once past its 12 h ceiling.
 func TestRobotProactiveNudge(t *testing.T) {
 	ctx := context.Background()
 	svc := newGameService()
@@ -206,18 +206,20 @@ func TestRobotProactiveNudge(t *testing.T) {
 		t.Fatalf("create: %v", err)
 	}
 
-	// A daytime turn start (the robot is awake for every ±3h drift between 07:30 and 12:00). No
-	// nudge before the 60-min floor of the first gap; exactly one once past its 90-min ceiling.
-	start := time.Date(2024, 1, 1, 10, 0, 0, 0, time.UTC)
+	// A noon turn start. The drive instants below sit at UTC hours 20:00 and (next day) 12:00,
+	// both in [10:00, 20:00] so the robot is awake for every ±3h sleep drift — the gap, not the
+	// sleep window, decides the outcome. No nudge at 8 h idle (before the 9 h floor); exactly one
+	// at 24 h idle (well past the 12 h ceiling, however the seed drew within 9-12 h).
+	start := time.Date(2024, 1, 1, 12, 0, 0, 0, time.UTC)
 	setTurnStarted(t, g.ID, start)
 
-	robots.Drive(ctx, start.Add(30*time.Minute))
+	robots.Drive(ctx, start.Add(8*time.Hour))
 	if n := countNudges(t, g.ID, robotID); n != 0 {
-		t.Errorf("robot nudges = %d at 30m idle, want 0 (before the first gap)", n)
+		t.Errorf("robot nudges = %d at 8h idle, want 0 (before the 9h floor)", n)
 	}
-	robots.Drive(ctx, start.Add(2*time.Hour))
+	robots.Drive(ctx, start.Add(24*time.Hour))
 	if n := countNudges(t, g.ID, robotID); n != 1 {
-		t.Errorf("robot nudges = %d at 2h idle, want 1 (after the first gap)", n)
+		t.Errorf("robot nudges = %d at 24h idle, want 1 (past the 12h ceiling)", n)
 	}
 }
 
@@ -249,3 +251,124 @@ func playHuman(t *testing.T, ctx context.Context, svc *game.Service, gameID, hum
 		t.Fatalf("human pass: %v", err)
 	}
 }
+
+// countMoves returns the number of committed moves in a game's journal.
+func countMoves(t *testing.T, gameID uuid.UUID) int {
+	t.Helper()
+	var n int
+	if err := testDB.QueryRowContext(context.Background(),
+		`SELECT count(*) FROM backend.game_moves WHERE game_id = $1`, gameID).Scan(&n); err != nil {
+		t.Fatalf("count moves: %v", err)
+	}
+	return n
+}
+
+// setLastTwoMoveTimes rewrites the created_at of a game's two most recent journal entries
+// so the endgame think-time anchor (their gap, the human's last-move think time) is a known
+// value, independent of the millisecond spacing of the manufactured passes.
+func setLastTwoMoveTimes(t *testing.T, gameID uuid.UUID, prevAt, lastAt time.Time) {
+	t.Helper()
+	ctx := context.Background()
+	if _, err := testDB.ExecContext(ctx,
+		`UPDATE backend.game_moves SET created_at = $2
+		   WHERE game_id = $1 AND seq = (SELECT max(seq) FROM backend.game_moves WHERE game_id = $1)`,
+		gameID, lastAt); err != nil {
+		t.Fatalf("set last move time: %v", err)
+	}
+	if _, err := testDB.ExecContext(ctx,
+		`UPDATE backend.game_moves SET created_at = $2
+		   WHERE game_id = $1 AND seq = (SELECT max(seq) - 1 FROM backend.game_moves WHERE game_id = $1)`,
+		gameID, prevAt); err != nil {
+		t.Fatalf("set prev move time: %v", err)
+	}
+}
+
+// TestRobotEndgamePassShrinksThinkTime checks the dead-drawn-endgame shrink end to end: when
+// the two most recent moves are both passes, RobotTurns reports EndgamePass with the human's
+// last-move think time (OppLastMove), and the driver answers on the shortened schedule — well
+// before the normal late-game delay — rather than dragging out the decided game. The journal
+// state is manufactured with direct passes so the test isolates the timing mechanism (the
+// SQL anchor and the driver gate) from a full game to an empty bag.
+func TestRobotEndgamePassShrinksThinkTime(t *testing.T) {
+	ctx := context.Background()
+	svc := newGameService()
+	robots := newRobotService(t, svc)
+	if err := robots.EnsurePool(ctx); err != nil {
+		t.Fatalf("ensure pool: %v", err)
+	}
+	robotID, err := robots.Pick(engine.VariantEnglish)
+	if err != nil {
+		t.Fatalf("pick: %v", err)
+	}
+	human := provisionAccount(t)
+	seed := openingSeed(t)
+
+	g, err := svc.Create(ctx, game.CreateParams{
+		Variant: engine.VariantEnglish, Seats: []uuid.UUID{human, robotID},
+		TurnTimeout: 24 * time.Hour, Seed: seed,
+	})
+	if err != nil {
+		t.Fatalf("create: %v", err)
+	}
+	const robotSeat = 1
+	store := game.NewStore(testDB)
+
+	turnOf := func(id uuid.UUID) game.RobotTurn {
+		t.Helper()
+		turns, err := store.RobotTurns(ctx, []uuid.UUID{robotID})
+		if err != nil {
+			t.Fatalf("robot turns: %v", err)
+		}
+		for _, rt := range turns {
+			if rt.GameID == id {
+				return rt
+			}
+		}
+		t.Fatalf("no robot turn for game %s", id)
+		return game.RobotTurn{}
+	}
+
+	// One pass so far (the human): not yet a double-pass endgame.
+	if _, err := svc.Pass(ctx, g.ID, human); err != nil {
+		t.Fatalf("human pass 1: %v", err)
+	}
+	if rt := turnOf(g.ID); rt.EndgamePass {
+		t.Fatalf("EndgamePass after a single pass = true, want false")
+	}
+
+	// Robot then human pass: the two most recent moves are now both passes and it is the
+	// robot's turn — the guaranteed-pass endgame state.
+	if _, err := svc.Pass(ctx, g.ID, robotID); err != nil {
+		t.Fatalf("robot pass: %v", err)
+	}
+	if _, err := svc.Pass(ctx, g.ID, human); err != nil {
+		t.Fatalf("human pass 2: %v", err)
+	}
+	if _, toMove, _, err := svc.Participants(ctx, g.ID); err != nil || toMove != robotSeat {
+		t.Fatalf("after two passes: toMove %d err %v, want robot seat %d", toMove, err, robotSeat)
+	}
+
+	// Anchor the human's last-move think time to 60s and start the robot's turn at daytime.
+	setLastTwoMoveTimes(t, g.ID, daytime.Add(-60*time.Second), daytime)
+	setTurnStarted(t, g.ID, daytime)
+
+	rt := turnOf(g.ID)
+	if !rt.EndgamePass {
+		t.Fatalf("EndgamePass after a double pass = false, want true")
+	}
+	if d := rt.OppLastMove; d < 59*time.Second || d > 61*time.Second {
+		t.Fatalf("OppLastMove = %s, want ~60s", d)
+	}
+
+	// The normal schedule for this move is at least the early band floor (~3.75 min); the
+	// 60s-anchored endgame delay is at most 90s for every seed. Driving at +150s is past the
+	// shrunk delay but well before the normal one, so the robot acts only because of the shrink.
+	before := countMoves(t, g.ID)
+	robots.Drive(ctx, daytime.Add(150*time.Second))
+	if after := countMoves(t, g.ID); after != before+1 {
+		t.Fatalf("robot did not act on the shrunk endgame schedule: moves %d → %d (want +1)", before, after)
+	}
+	if _, toMove, _, err := svc.Participants(ctx, g.ID); err != nil || toMove == robotSeat {
+		t.Fatalf("after the shrunk move: still the robot's turn (toMove %d, err %v)", toMove, err)
+	}
+}

backend/internal/inttest/seat_display_name_test.go

@@ -0,0 +1,102 @@
+//go:build integration
+
+package inttest
+
+import (
+	"context"
+	"testing"
+
+	"github.com/google/uuid"
+
+	"scrabble/backend/internal/account"
+	"scrabble/backend/internal/engine"
+	"scrabble/backend/internal/game"
+)
+
+// The seat display-name snapshot freezes the name an opponent sees for the life of a
+// game (a later rename no longer rewrites past games) and lets a disguised robot carry a
+// fresh per-game name (docs/ARCHITECTURE.md §7).
+
+// seatByAccount returns the seat held by id and whether it was found.
+func seatByAccount(g game.Game, id uuid.UUID) (game.Seat, bool) {
+	for _, s := range g.Seats {
+		if s.AccountID == id {
+			return s, true
+		}
+	}
+	return game.Seat{}, false
+}
+
+// TestSeatNameFrozenAfterRename checks a human seat captures the player's display name
+// when the seat is taken and keeps it after the account is later renamed.
+func TestSeatNameFrozenAfterRename(t *testing.T) {
+	ctx := context.Background()
+	clearOpenGames(t)
+	svc := newGameService()
+	accounts := account.NewStore(testDB)
+
+	starter := provisionAccount(t)
+	if _, err := accounts.UpdateProfile(ctx, starter, account.ProfileUpdate{
+		DisplayName: "Original Name", PreferredLanguage: "en", TimeZone: "UTC", VariantPreferences: []string{"erudit_ru"},
+	}); err != nil {
+		t.Fatalf("set name: %v", err)
+	}
+
+	g := openGame(t, svc, starter, evenOpeningSeed(t))
+	seat, ok := seatByAccount(g, starter)
+	if !ok || seat.DisplayName != "Original Name" {
+		t.Fatalf("opened seat snapshot = %q (found %v), want %q", seat.DisplayName, ok, "Original Name")
+	}
+
+	// Rename the account; the snapshot on the already-taken seat must not follow.
+	if _, err := accounts.UpdateProfile(ctx, starter, account.ProfileUpdate{
+		DisplayName: "Renamed Player99", PreferredLanguage: "en", TimeZone: "UTC", VariantPreferences: []string{"erudit_ru"},
+	}); err != nil {
+		t.Fatalf("rename: %v", err)
+	}
+	reloaded, err := svc.GameByID(ctx, g.ID)
+	if err != nil {
+		t.Fatalf("reload game: %v", err)
+	}
+	got, _ := seatByAccount(reloaded, starter)
+	if got.DisplayName != "Original Name" {
+		t.Errorf("seat snapshot after rename = %q, want it frozen at %q", got.DisplayName, "Original Name")
+	}
+}
+
+// TestRobotSeatGetsComposedName checks the disguised auto-match robot's seat stores the
+// fresh per-game name composed at attach time (PickNamed -> AttachRobot -> seat), and
+// that the name is a valid human display name so the robot stays indistinguishable.
+func TestRobotSeatGetsComposedName(t *testing.T) {
+	ctx := context.Background()
+	clearOpenGames(t)
+	svc := newGameService()
+	robots := newRobotService(t, svc)
+	if err := robots.EnsurePool(ctx); err != nil {
+		t.Fatalf("ensure pool: %v", err)
+	}
+
+	g := openGame(t, svc, provisionAccount(t), evenOpeningSeed(t))
+	robotID, name, err := robots.PickNamed(engine.VariantEnglish)
+	if err != nil {
+		t.Fatalf("pick named: %v", err)
+	}
+	if _, err := account.ValidateDisplayName(name); err != nil {
+		t.Fatalf("composed robot name %q is not a valid display name: %v", name, err)
+	}
+	if _, attached, err := svc.AttachRobot(ctx, g.ID, robotID, name); err != nil || !attached {
+		t.Fatalf("attach robot = (attached %v, err %v), want attached", attached, err)
+	}
+
+	reloaded, err := svc.GameByID(ctx, g.ID)
+	if err != nil {
+		t.Fatalf("reload game: %v", err)
+	}
+	seat, ok := seatByAccount(reloaded, robotID)
+	if !ok {
+		t.Fatal("robot seat not found after attach")
+	}
+	if seat.DisplayName != name {
+		t.Errorf("robot seat snapshot = %q, want the composed per-game name %q", seat.DisplayName, name)
+	}
+}

backend/internal/inttest/social_test.go

@@ -45,6 +45,20 @@ func (c *capturePublisher) notified(user uuid.UUID, sub string) bool {
 	return false
 }
 
+// delivered reports whether an intent of the given top-level kind (e.g. chat_message,
+// nudge) was published to user — used to assert that a blocked sender's message or nudge
+// never reaches the blocker.
+func (c *capturePublisher) delivered(user uuid.UUID, kind string) bool {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	for _, in := range c.intents {
+		if in.UserID == user && in.Kind == kind {
+			return true
+		}
+	}
+	return false
+}
+
 // TestFriendRequestToRobotStaysPending checks a friend request to a robot is accepted as
 // pending rather than blocked: robots no longer block friend requests, so the request
 // just sits unanswered and later expires — mirroring a human who ignores it.
@@ -121,24 +135,60 @@ func TestFriendRequestRefusedByToggleAndBlock(t *testing.T) {
 
 	// Toggle: the addressee does not accept friend requests.
 	a, b := provisionAccount(t), provisionAccount(t)
-	if _, err := store.UpdateProfile(ctx, b, account.ProfileUpdate{DisplayName: "Player", PreferredLanguage: "en", TimeZone: "UTC", BlockFriendRequests: true}); err != nil {
+	if _, err := store.UpdateProfile(ctx, b, account.ProfileUpdate{DisplayName: "Player", PreferredLanguage: "en", TimeZone: "UTC", BlockFriendRequests: true, VariantPreferences: []string{"erudit_ru"}}); err != nil {
 		t.Fatalf("set toggle: %v", err)
 	}
 	if err := svc.SendFriendRequest(ctx, a, b); !errors.Is(err, social.ErrRequestBlocked) {
 		t.Fatalf("toggle send = %v, want ErrRequestBlocked", err)
 	}
 
-	// Block: the addressee has blocked the requester.
-	c, d := provisionAccount(t), provisionAccount(t)
-	if err := svc.Block(ctx, d, c); err != nil {
+	// Block from the requester's own side: a requester who has blocked the addressee is
+	// refused outright (they are the blocker and aware of it). The reverse direction — the
+	// addressee having blocked the requester — is instead silently suppressed, covered by
+	// TestFriendRequestFromBlockedIsSuppressed.
+	_, seats := newGameWithSeats(t, 2)
+	c, d := seats[0], seats[1]
+	if err := svc.Block(ctx, c, d); err != nil {
 		t.Fatalf("block: %v", err)
 	}
 	if err := svc.SendFriendRequest(ctx, c, d); !errors.Is(err, social.ErrRequestBlocked) {
-		t.Fatalf("blocked send = %v, want ErrRequestBlocked", err)
+		t.Fatalf("blocker's own request = %v, want ErrRequestBlocked", err)
 	}
 }
 
-func TestBlockSeversFriendship(t *testing.T) {
+// TestFriendRequestFromBlockedIsSuppressed checks the store-but-hide path: when the
+// addressee has blocked the requester, the requester's friend request succeeds silently
+// (no error — they must not notice the block), is stored, but is never delivered to nor
+// surfaced for the blocker.
+func TestFriendRequestFromBlockedIsSuppressed(t *testing.T) {
+	ctx := context.Background()
+	svc := newSocialService()
+	pub := &capturePublisher{}
+	svc.SetNotifier(pub)
+	_, seats := newGameWithSeats(t, 2)
+	blocker, blocked := seats[0], seats[1]
+	if err := svc.Block(ctx, blocker, blocked); err != nil {
+		t.Fatalf("block: %v", err)
+	}
+	if err := svc.SendFriendRequest(ctx, blocked, blocker); err != nil {
+		t.Fatalf("suppressed request = %v, want nil", err)
+	}
+	if pub.notified(blocker, notify.NotifyFriendRequest) {
+		t.Error("blocker must not be notified of a suppressed request")
+	}
+	if got, _ := svc.ListIncomingRequests(ctx, blocker); len(got) != 0 {
+		t.Errorf("blocker incoming = %v, want none (suppressed)", got)
+	}
+	// The blocked user sees an ordinary outgoing request — no leak of the block.
+	if got, _ := svc.ListOutgoingRequests(ctx, blocked); len(got) != 1 || got[0] != blocker {
+		t.Errorf("blocked outgoing = %v, want [blocker]", got)
+	}
+}
+
+// TestBlockKeepsFriendshipHiddenFromBlocker checks a block overrides but does not delete a
+// friendship: the blocker stops seeing the blocked friend, the blocked user's own list is
+// unchanged (so they never notice), and an unblock cleanly restores the friendship.
+func TestBlockKeepsFriendshipHiddenFromBlocker(t *testing.T) {
 	ctx := context.Background()
 	svc := newSocialService()
 	_, seats := newGameWithSeats(t, 2)
@@ -153,7 +203,16 @@ func TestBlockSeversFriendship(t *testing.T) {
 		t.Fatalf("block: %v", err)
 	}
 	if friends, _ := svc.ListFriends(ctx, a); len(friends) != 0 {
-		t.Errorf("friendship must be severed by a block, got %v", friends)
+		t.Errorf("blocker's friend list = %v, want the blocked friend hidden", friends)
+	}
+	if friends, _ := svc.ListFriends(ctx, b); len(friends) != 1 || friends[0] != a {
+		t.Errorf("blocked user's friend list = %v, want [blocker] unchanged", friends)
+	}
+	if err := svc.Unblock(ctx, a, b); err != nil {
+		t.Fatalf("unblock: %v", err)
+	}
+	if friends, _ := svc.ListFriends(ctx, a); len(friends) != 1 || friends[0] != b {
+		t.Errorf("after unblock, blocker's friend list = %v, want [b] restored", friends)
 	}
 }
 
@@ -294,7 +353,7 @@ func TestChatPostListAndBlocks(t *testing.T) {
 	if _, err := svc.PostMessage(ctx, other, seats2[0], "hi", ""); err != nil {
 		t.Fatalf("post 2: %v", err)
 	}
-	if _, err := store.UpdateProfile(ctx, seats2[1], account.ProfileUpdate{DisplayName: "Player", PreferredLanguage: "en", TimeZone: "UTC", BlockChat: true}); err != nil {
+	if _, err := store.UpdateProfile(ctx, seats2[1], account.ProfileUpdate{DisplayName: "Player", PreferredLanguage: "en", TimeZone: "UTC", BlockChat: true, VariantPreferences: []string{"erudit_ru"}}); err != nil {
 		t.Fatalf("set block_chat: %v", err)
 	}
 	if msgs, _ := svc.Messages(ctx, other, seats2[1]); len(msgs) != 0 {
@@ -382,6 +441,33 @@ func TestNudgeRulesAndRateLimit(t *testing.T) {
 	}
 }
 
+// TestSeatNameResolvesDisplayName checks game.Service.SeatName surfaces a seated account's
+// display name — the identity social.Nudge voices the nudge with — and returns "" for an account
+// that holds no seat (the render then falls back to the plain phrase).
+func TestSeatNameResolvesDisplayName(t *testing.T) {
+	ctx := context.Background()
+	gsvc := newGameService()
+	// ProvisionRobot is the one provisioning path that stamps a known display name (a plain
+	// provisioned account has none), so the seat resolves to a name we can assert.
+	named, err := account.NewStore(testDB).ProvisionRobot(ctx, "tg-"+uuid.NewString(), "Ann")
+	if err != nil {
+		t.Fatalf("provision named account: %v", err)
+	}
+	g, err := gsvc.Create(ctx, game.CreateParams{
+		Variant: engine.VariantEnglish, Seats: []uuid.UUID{provisionAccount(t), named.ID},
+		TurnTimeout: 24 * time.Hour, Seed: openingSeed(t),
+	})
+	if err != nil {
+		t.Fatalf("create: %v", err)
+	}
+	if got, err := gsvc.SeatName(ctx, g.ID, named.ID); err != nil || got != "Ann" {
+		t.Errorf("seated SeatName = (%q, %v), want (\"Ann\", nil)", got, err)
+	}
+	if got, err := gsvc.SeatName(ctx, g.ID, provisionAccount(t)); err != nil || got != "" {
+		t.Errorf("non-seated SeatName = (%q, %v), want (\"\", nil)", got, err)
+	}
+}
+
 // TestNudgeCooldownResetsOnAction checks the nudge cooldown clears once the player has
 // acted (moved or chatted) since their last nudge, even within the hour.
 func TestNudgeCooldownResetsOnAction(t *testing.T) {
@@ -502,32 +588,6 @@ func TestRespondPublishesToRequester(t *testing.T) {
 	}
 }
 
-// TestNudgeRoutedByGameLanguage checks a nudge's out-of-app push carries the game's language, so
-// it is delivered by the game's bot rather than the recipient's last-login bot.
-func TestNudgeRoutedByGameLanguage(t *testing.T) {
-	ctx := context.Background()
-	svc := newSocialService()
-	pub := &capturePublisher{}
-	svc.SetNotifier(pub)
-
-	gameID, seats := newGameWithSeats(t, 2) // an English game; seat 0 is to move
-	if _, err := svc.Nudge(ctx, gameID, seats[1]); err != nil {
-		t.Fatalf("nudge: %v", err)
-	}
-	found := false
-	for _, in := range pub.intents {
-		if in.Kind == notify.KindNudge {
-			found = true
-			if in.Language != "en" {
-				t.Errorf("nudge language = %q, want en (the game's language)", in.Language)
-			}
-		}
-	}
-	if !found {
-		t.Fatal("no nudge intent published")
-	}
-}
-
 // TestAdminListMessages checks the admin moderation list: real messages only
 // (nudges excluded), the game / sender pins, the sender glob masks, and the source label.
 func TestAdminListMessages(t *testing.T) {

backend/internal/inttest/suspension_gate_test.go

@@ -38,7 +38,7 @@ func TestSuspensionGate(t *testing.T) {
 		Accounts: accounts,
 	})
 
-	acc, err := accounts.ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "ru", "", "Blocked")
+	acc, _, err := accounts.ProvisionTelegram(ctx, "tg-"+uuid.NewString(), "ru", "", "Blocked", "")
 	if err != nil {
 		t.Fatalf("provision: %v", err)
 	}

backend/internal/inttest/userlist_test.go

@@ -18,7 +18,7 @@ func TestUserListFilter(t *testing.T) {
 	st := account.NewStore(testDB)
 	uniq := uuid.NewString()
 
-	human, err := st.ProvisionTelegram(ctx, "tg-"+uniq, "en", "", "Zzqxhuman")
+	human, _, err := st.ProvisionTelegram(ctx, "tg-"+uniq, "en", "", "Zzqxhuman", "")
 	if err != nil {
 		t.Fatalf("provision human: %v", err)
 	}
@@ -26,7 +26,7 @@ func TestUserListFilter(t *testing.T) {
 	if err != nil {
 		t.Fatalf("provision robot: %v", err)
 	}
-	guest, err := st.ProvisionGuest(ctx)
+	guest, err := st.ProvisionGuest(ctx, "")
 	if err != nil {
 		t.Fatalf("provision guest: %v", err)
 	}

backend/internal/inttest/variant_preference_test.go

@@ -0,0 +1,51 @@
+//go:build integration
+
+package inttest
+
+import (
+	"fmt"
+	"net/http"
+	"testing"
+	"time"
+
+	"go.uber.org/zap/zaptest"
+
+	"scrabble/backend/internal/account"
+	"scrabble/backend/internal/server"
+)
+
+// TestVariantPreferenceGate covers the New Game gate: a player may start a quick game
+// or create a friend invitation only in a variant they have enabled in their profile
+// (a fresh account defaults to Erudit only), and any other variant is refused with 400.
+// The complementary case — an invited friend accepting an invitation in a variant they
+// have NOT enabled — is exercised by TestGameLimitGate, where a default-Erudit human
+// accepts an English invitation over HTTP.
+func TestVariantPreferenceGate(t *testing.T) {
+	clearOpenGames(t)
+	srv := server.New(":0", server.Deps{
+		Logger:      zaptest.NewLogger(t),
+		DB:          testDB,
+		Accounts:    account.NewStore(testDB),
+		Games:       newGameService(),
+		Matchmaker:  newMatchmaker(t, newRobotService(t, newGameService()), time.Minute, 0),
+		Invitations: newInvitationService(),
+	})
+
+	human := provisionAccount(t) // default preferences: erudit_ru only
+	opp := provisionAccount(t)
+
+	// A variant outside the player's preferences is refused on both create paths.
+	if rec := userPost(t, srv, "/api/v1/user/lobby/enqueue", human, `{"variant":"scrabble_en"}`); rec.Code != http.StatusBadRequest {
+		t.Fatalf("enqueue non-preferred variant = %d (%s), want 400", rec.Code, rec.Body.String())
+	}
+	invBody := fmt.Sprintf(`{"variant":"scrabble_en","invitee_ids":[%q]}`, opp.String())
+	if rec := userPost(t, srv, "/api/v1/user/invitations", human, invBody); rec.Code != http.StatusBadRequest {
+		t.Fatalf("invitation non-preferred variant = %d (%s), want 400", rec.Code, rec.Body.String())
+	}
+
+	// The default-enabled variant (Erudit) is allowed: the quick enqueue opens a game.
+	if rec := userPost(t, srv, "/api/v1/user/lobby/enqueue", human, `{"variant":"erudit_ru"}`); rec.Code != http.StatusOK {
+		t.Fatalf("enqueue preferred variant = %d (%s), want 200", rec.Code, rec.Body.String())
+	}
+	clearOpenGames(t)
+}

backend/internal/lobby/invitations.go

@@ -150,6 +150,14 @@ func (svc *InvitationService) emitInvitationUpdate(ctx context.Context, inv Invi
 	}
 	intents := make([]notify.Intent, 0, len(recipients))
 	for _, id := range recipients {
+		// An invitee who has blocked the inviter never sees this invitation, so they must not
+		// receive its updates either (an update would otherwise re-add it to their lobby). The
+		// inviter always gets updates; on a lookup error suppress rather than risk a leak.
+		if id != inv.InviterID {
+			if blk, err := svc.blocker.Blocks(ctx, id, inv.InviterID); err != nil || blk {
+				continue
+			}
+		}
 		intents = append(intents, notify.NotificationInvitationUpdate(id, summary))
 	}
 	svc.pub.Publish(intents...)
@@ -211,6 +219,11 @@ func (svc *InvitationService) CreateInvitation(ctx context.Context, inviterID uu
 		return Invitation{}, fmt.Errorf("%w: turn timeout %s not allowed", ErrInvalidInvitation, settings.TurnTimeout)
 	}
 	seen := map[uuid.UUID]bool{inviterID: true}
+	// suppressed collects invitees who have blocked the inviter: the invitation is still
+	// created and persisted for them, but they are never notified and never see it (their
+	// friendship with the inviter survived the block, so they can still appear in the
+	// inviter's picker — they must not learn of the block).
+	suppressed := make(map[uuid.UUID]bool)
 	for _, id := range inviteeIDs {
 		if seen[id] {
 			return Invitation{}, fmt.Errorf("%w: %s invited twice or is the inviter", ErrInvalidInvitation, id)
@@ -222,13 +235,22 @@ func (svc *InvitationService) CreateInvitation(ctx context.Context, inviterID uu
 			}
 			return Invitation{}, err
 		}
-		blocked, err := svc.blocker.IsBlocked(ctx, inviterID, id)
+		// A block the inviter placed refuses the invite (the inviter is aware; the picker hides
+		// the invitee anyway). A block the invitee placed on the inviter is instead suppressed.
+		iBlock, err := svc.blocker.Blocks(ctx, inviterID, id)
 		if err != nil {
 			return Invitation{}, err
 		}
-		if blocked {
+		if iBlock {
 			return Invitation{}, ErrInvitationBlocked
 		}
+		theyBlock, err := svc.blocker.Blocks(ctx, id, inviterID)
+		if err != nil {
+			return Invitation{}, err
+		}
+		if theyBlock {
+			suppressed[id] = true
+		}
 	}
 
 	id, err := uuid.NewV7()
@@ -253,7 +275,18 @@ func (svc *InvitationService) CreateInvitation(ctx context.Context, inviterID uu
 	if err != nil {
 		return Invitation{}, err
 	}
-	svc.emitInvitation(ctx, inv, inviteeIDs)
+	// Notify every invitee except those who have blocked the inviter (their copy stays
+	// stored but unseen — the store-but-hide that keeps the block invisible).
+	notifyIDs := inviteeIDs
+	if len(suppressed) > 0 {
+		notifyIDs = make([]uuid.UUID, 0, len(inviteeIDs))
+		for _, id := range inviteeIDs {
+			if !suppressed[id] {
+				notifyIDs = append(notifyIDs, id)
+			}
+		}
+	}
+	svc.emitInvitation(ctx, inv, notifyIDs)
 	return inv, nil
 }
 
@@ -347,6 +380,17 @@ func (svc *InvitationService) ListInvitations(ctx context.Context, accountID uui
 		if err != nil {
 			return nil, err
 		}
+		// Hide an invitation whose inviter the viewer has blocked: it stays stored but must
+		// never surface to the blocker. The viewer's own invitations (as inviter) are unaffected.
+		if inv.InviterID != accountID {
+			blocked, err := svc.blocker.Blocks(ctx, accountID, inv.InviterID)
+			if err != nil {
+				return nil, err
+			}
+			if blocked {
+				continue
+			}
+		}
 		out = append(out, inv)
 	}
 	return out, nil

backend/internal/lobby/lobby.go

@@ -33,13 +33,20 @@ type GameCreator interface {
 // available so the matchmaker can defer substitution.
 type RobotProvider interface {
 	Pick(variant engine.Variant) (uuid.UUID, error)
+	// PickNamed selects a robot and composes a fresh per-game display name for it, for
+	// the disguised auto-match path (the name is stamped on the robot's seat).
+	PickNamed(variant engine.Variant) (uuid.UUID, string, error)
 }
 
-// Blocker reports whether two accounts have a block between them (either
-// direction). social.Service satisfies it; the lobby uses it to refuse
-// invitations between blocked accounts.
+// Blocker exposes the per-user block graph the lobby needs. social.Service satisfies it.
+// Invitations consult the exact direction (Blocks) so the inviter's block refuses while a
+// block the invitee placed on the inviter is silently suppressed; auto-match consults
+// BlockedWith so a block either way keeps the pair out of the same anonymous game.
 type Blocker interface {
-	IsBlocked(ctx context.Context, a, b uuid.UUID) (bool, error)
+	// Blocks reports whether blocker has blocked blocked (exact direction).
+	Blocks(ctx context.Context, blocker, blocked uuid.UUID) (bool, error)
+	// BlockedWith returns every account in a block with accountID in either direction.
+	BlockedWith(ctx context.Context, accountID uuid.UUID) ([]uuid.UUID, error)
 }
 
 // Auto-match defaults: a casual two-player game on the longest move clock with one

backend/internal/lobby/matchmaker.go

@@ -18,10 +18,16 @@ import (
 // reading a player's view to enrich the opponent_joined event. game.Service satisfies
 // it.
 type GameMatcher interface {
-	OpenOrJoin(ctx context.Context, accountID uuid.UUID, params game.CreateParams, openDeadline time.Time) (game.Game, bool, error)
-	AttachRobot(ctx context.Context, gameID, robotID uuid.UUID) (game.Game, bool, error)
+	// OpenOrJoin joins the caller into another waiting player's open game or opens a fresh
+	// one; exclude lists account IDs whose open game must never be joined (the caller's
+	// per-user block set), so a block keeps the pair out of the same anonymous game.
+	OpenOrJoin(ctx context.Context, accountID uuid.UUID, params game.CreateParams, openDeadline time.Time, exclude []uuid.UUID) (game.Game, bool, error)
+	AttachRobot(ctx context.Context, gameID, robotID uuid.UUID, displayName string) (game.Game, bool, error)
 	ExpiredOpen(ctx context.Context, now time.Time) ([]game.OpenGame, error)
 	InitialState(ctx context.Context, gameID, accountID uuid.UUID) (notify.PlayerState, error)
+	// Create seats the given accounts in an active game at once; the AI-match path uses
+	// it to start a game already seated with a robot (no open/wait phase).
+	Create(ctx context.Context, params game.CreateParams) (game.Game, error)
 }
 
 // Matchmaker turns an auto-match enqueue into a real game the player enters at once:
@@ -32,8 +38,9 @@ type GameMatcher interface {
 // Matchmaker holds only the wait policy and the live-event publisher, and is safe for
 // concurrent use.
 //
-// Auto-match is anonymous, so it does not consult per-user blocks (those govern
-// friends, chat and invitations between known players).
+// Auto-match is anonymous, but it still consults per-user blocks: a player is never
+// paired into a game whose waiting opponent they have blocked, or who has blocked them
+// (either direction), so a block keeps two players apart everywhere.
 type Matchmaker struct {
 	games   GameMatcher
 	robots  RobotProvider
@@ -41,6 +48,7 @@ type Matchmaker struct {
 	jitter  time.Duration
 	clock   func() time.Time
 	pub     notify.Publisher
+	blocker Blocker
 	log     *zap.Logger
 }
 
@@ -72,6 +80,16 @@ func (m *Matchmaker) SetNotifier(p notify.Publisher) {
 	}
 }
 
+// SetBlocker installs the per-user block source used to keep auto-match from pairing a
+// player with someone they have a block with (either direction). It must be called
+// during startup wiring; the default is no blocker, in which case auto-match pairs
+// anonymously (no block exclusion).
+func (m *Matchmaker) SetBlocker(b Blocker) {
+	if b != nil {
+		m.blocker = b
+	}
+}
+
 // EnqueueResult is the outcome of an auto-match enqueue: the game the caller now plays
 // in, and whether it already had an opponent (they joined a waiting game) rather than
 // being freshly opened and still awaiting one.
@@ -82,11 +100,22 @@ type EnqueueResult struct {
 
 // Enqueue resolves an auto-match request for accountID under variant and the per-turn
 // word rule (multipleWords) into the game they enter immediately — a freshly opened
-// game awaiting an opponent, the caller's own still-open game (a re-enqueue is
-// idempotent), or another player's open game they just joined. When the caller joins
-// an existing game, opponent_joined is pushed to that game's waiting starter.
+// game awaiting an opponent, or another player's open game they just joined. A
+// re-enqueue while already waiting opens another game rather than returning the
+// caller's own. When the caller joins an existing game, opponent_joined is pushed to
+// that game's waiting starter.
 func (m *Matchmaker) Enqueue(ctx context.Context, accountID uuid.UUID, variant engine.Variant, multipleWords bool) (EnqueueResult, error) {
-	g, joined, err := m.games.OpenOrJoin(ctx, accountID, autoMatchParams(variant, multipleWords), m.openDeadline())
+	// Exclude every account the caller has a block with (either direction) from the
+	// candidate open games, so auto-match never pairs a blocked pair into one game.
+	var exclude []uuid.UUID
+	if m.blocker != nil {
+		var err error
+		exclude, err = m.blocker.BlockedWith(ctx, accountID)
+		if err != nil {
+			return EnqueueResult{}, err
+		}
+	}
+	g, joined, err := m.games.OpenOrJoin(ctx, accountID, autoMatchParams(variant, multipleWords), m.openDeadline(), exclude)
 	if err != nil {
 		return EnqueueResult{}, err
 	}
@@ -96,6 +125,29 @@ func (m *Matchmaker) Enqueue(ctx context.Context, accountID uuid.UUID, variant e
 	return EnqueueResult{Matched: joined, Game: g}, nil
 }
 
+// StartVsAI creates an honest-AI game for accountID against a pooled robot, returning
+// the game the player enters at once. Unlike Enqueue it never opens or waits: it picks
+// a robot for the variant, seats the human and the robot in a random order (seat 0
+// moves first), and creates an active game flagged vs_ai. The flag makes the robot
+// reply immediately and suppresses chat, nudge and statistics; the robot's first move
+// (when it is seated first) follows on the game service's fast-move trigger.
+func (m *Matchmaker) StartVsAI(ctx context.Context, accountID uuid.UUID, variant engine.Variant, multipleWords bool) (EnqueueResult, error) {
+	robotID, err := m.robots.Pick(variant)
+	if err != nil {
+		return EnqueueResult{}, err
+	}
+	params := aiMatchParams(variant, multipleWords)
+	params.Seats = []uuid.UUID{accountID, robotID}
+	if rand.IntN(2) == 1 {
+		params.Seats = []uuid.UUID{robotID, accountID}
+	}
+	g, err := m.games.Create(ctx, params)
+	if err != nil {
+		return EnqueueResult{}, err
+	}
+	return EnqueueResult{Matched: true, Game: g}, nil
+}
+
 // RunReaper substitutes a robot for any open game past its wait window, scanning every
 // interval until ctx is cancelled. It is started once from main.
 func (m *Matchmaker) RunReaper(ctx context.Context, interval time.Duration) {
@@ -122,12 +174,12 @@ func (m *Matchmaker) Reap(ctx context.Context, now time.Time) {
 		return
 	}
 	for _, og := range due {
-		robotID, err := m.robots.Pick(og.Variant)
+		robotID, name, err := m.robots.PickNamed(og.Variant)
 		if err != nil {
 			m.log.Warn("robot substitution deferred", zap.Error(err))
 			continue
 		}
-		g, attached, err := m.games.AttachRobot(ctx, og.ID, robotID)
+		g, attached, err := m.games.AttachRobot(ctx, og.ID, robotID, name)
 		if err != nil {
 			m.log.Warn("robot substitution failed", zap.String("game", og.ID.String()), zap.Error(err))
 			continue
@@ -154,7 +206,6 @@ func (m *Matchmaker) announceOpponent(ctx context.Context, g game.Game, joinerID
 		return
 	}
 	intent := notify.OpponentJoined(starter, g.ID, state)
-	intent.Language = g.Variant.Language()
 	m.pub.Publish(intent)
 }
 
@@ -191,3 +242,17 @@ func autoMatchParams(variant engine.Variant, multipleWords bool) game.CreatePara
 		MultipleWordsPerTurn: multipleWords,
 	}
 }
+
+// aiMatchParams builds the create parameters for an honest-AI two-player game: the
+// same casual auto-match defaults plus the vs_ai flag. The 7-day inactivity clock is
+// applied by the game service for vs_ai games, so TurnTimeout is left zero; the caller
+// fills Seats with the human and the picked robot.
+func aiMatchParams(variant engine.Variant, multipleWords bool) game.CreateParams {
+	return game.CreateParams{
+		Variant:              variant,
+		HintsAllowed:         autoMatchHintsAllowed,
+		HintsPerPlayer:       autoMatchHintsPerPlayer,
+		MultipleWordsPerTurn: multipleWords,
+		VsAI:                 true,
+	}
+}

backend/internal/lobby/matchmaker_test.go

@@ -3,6 +3,7 @@ package lobby
 import (
 	"context"
 	"errors"
+	"slices"
 	"testing"
 	"time"
 
@@ -24,6 +25,7 @@ type stubMatcher struct {
 	openErr      error
 	openCalls    int
 	lastDeadline time.Time
+	lastExclude  []uuid.UUID
 
 	expired []game.OpenGame
 
@@ -31,15 +33,21 @@ type stubMatcher struct {
 	attached      bool
 	attachErr     error
 	attachedGames []uuid.UUID
+
+	createGame   game.Game
+	createErr    error
+	createCalls  int
+	createParams game.CreateParams
 }
 
-func (s *stubMatcher) OpenOrJoin(_ context.Context, _ uuid.UUID, _ game.CreateParams, deadline time.Time) (game.Game, bool, error) {
+func (s *stubMatcher) OpenOrJoin(_ context.Context, _ uuid.UUID, _ game.CreateParams, deadline time.Time, exclude []uuid.UUID) (game.Game, bool, error) {
 	s.openCalls++
 	s.lastDeadline = deadline
+	s.lastExclude = exclude
 	return s.openGame, s.openJoined, s.openErr
 }
 
-func (s *stubMatcher) AttachRobot(_ context.Context, gameID, _ uuid.UUID) (game.Game, bool, error) {
+func (s *stubMatcher) AttachRobot(_ context.Context, gameID, _ uuid.UUID, _ string) (game.Game, bool, error) {
 	if s.attachErr != nil {
 		return game.Game{}, false, s.attachErr
 	}
@@ -57,6 +65,12 @@ func (s *stubMatcher) InitialState(_ context.Context, _, _ uuid.UUID) (notify.Pl
 	return notify.PlayerState{}, nil
 }
 
+func (s *stubMatcher) Create(_ context.Context, params game.CreateParams) (game.Game, error) {
+	s.createCalls++
+	s.createParams = params
+	return s.createGame, s.createErr
+}
+
 // fakeRobots is a RobotProvider returning a fixed robot id, or an error to model an
 // empty pool. It records the variant of the last substitution request.
 type fakeRobots struct {
@@ -73,11 +87,43 @@ func (f *fakeRobots) Pick(variant engine.Variant) (uuid.UUID, error) {
 	return f.id, nil
 }
 
+func (f *fakeRobots) PickNamed(variant engine.Variant) (uuid.UUID, string, error) {
+	id, err := f.Pick(variant)
+	return id, "Robot", err
+}
+
 // capturePub records every published intent.
 type capturePub struct{ intents []notify.Intent }
 
 func (c *capturePub) Publish(intents ...notify.Intent) { c.intents = append(c.intents, intents...) }
 
+// fakeBlocker is a Blocker returning a canned both-direction block set.
+type fakeBlocker struct {
+	with []uuid.UUID
+	err  error
+}
+
+func (f *fakeBlocker) Blocks(context.Context, uuid.UUID, uuid.UUID) (bool, error) { return false, nil }
+func (f *fakeBlocker) BlockedWith(context.Context, uuid.UUID) ([]uuid.UUID, error) {
+	return f.with, f.err
+}
+
+// TestEnqueueExcludesBlockedStarters checks the matchmaker passes the caller's block set
+// (both directions) to OpenOrJoin as the exclusion list, so auto-match never joins a game
+// whose waiting player has a block with the caller.
+func TestEnqueueExcludesBlockedStarters(t *testing.T) {
+	caller, blocked := uuid.New(), uuid.New()
+	m := &stubMatcher{openGame: twoSeatGame(caller, uuid.Nil)}
+	mm := NewMatchmaker(m, &fakeRobots{id: uuid.New()}, time.Minute, time.Minute, zap.NewNop())
+	mm.SetBlocker(&fakeBlocker{with: []uuid.UUID{blocked}})
+	if _, err := mm.Enqueue(context.Background(), caller, engine.VariantEnglish, true); err != nil {
+		t.Fatalf("enqueue: %v", err)
+	}
+	if !slices.Contains(m.lastExclude, blocked) {
+		t.Fatalf("OpenOrJoin exclude = %v, want it to contain the blocked id %s", m.lastExclude, blocked)
+	}
+}
+
 // twoSeatGame is a two-player game seating starter at seat 0 and opponent at seat 1
 // (uuid.Nil for a still-empty opponent seat).
 func twoSeatGame(starter, opponent uuid.UUID) game.Game {
@@ -135,6 +181,48 @@ func TestEnqueueJoinEmitsOpponentJoinedToStarter(t *testing.T) {
 	}
 }
 
+func TestStartVsAISeatsRobotAndFlagsGame(t *testing.T) {
+	human, robotID := uuid.New(), uuid.New()
+	m := &stubMatcher{createGame: twoSeatGame(human, robotID)}
+	robots := &fakeRobots{id: robotID}
+	mm := NewMatchmaker(m, robots, time.Minute, time.Minute, zap.NewNop())
+
+	res, err := mm.StartVsAI(context.Background(), human, engine.VariantRussianScrabble, false)
+	if err != nil {
+		t.Fatalf("start vs AI: %v", err)
+	}
+	if !res.Matched {
+		t.Error("an AI game starts already matched (Matched=true)")
+	}
+	// The AI path creates a seated active game and never enters the open pool.
+	if m.createCalls != 1 || m.openCalls != 0 {
+		t.Errorf("calls: create=%d open=%d, want create=1 open=0", m.createCalls, m.openCalls)
+	}
+	if robots.lastVariant != engine.VariantRussianScrabble {
+		t.Errorf("robot picked for variant %v, want RussianScrabble", robots.lastVariant)
+	}
+	if !m.createParams.VsAI {
+		t.Error("AI game create params must set VsAI")
+	}
+	if len(m.createParams.Seats) != 2 ||
+		!slices.Contains(m.createParams.Seats, human) || !slices.Contains(m.createParams.Seats, robotID) {
+		t.Errorf("AI game seats %v, want exactly the human %s and the robot %s", m.createParams.Seats, human, robotID)
+	}
+}
+
+func TestStartVsAINoRobotLeavesNoGame(t *testing.T) {
+	poolErr := errors.New("pool empty")
+	m := &stubMatcher{}
+	mm := NewMatchmaker(m, &fakeRobots{err: poolErr}, time.Minute, time.Minute, zap.NewNop())
+
+	if _, err := mm.StartVsAI(context.Background(), uuid.New(), engine.VariantEnglish, true); !errors.Is(err, poolErr) {
+		t.Fatalf("start vs AI with empty pool = %v, want poolErr", err)
+	}
+	if m.createCalls != 0 {
+		t.Errorf("no robot available must not create a game; create calls = %d", m.createCalls)
+	}
+}
+
 func TestEnqueueDeadlineWithinWindow(t *testing.T) {
 	base := time.Now()
 	m := &stubMatcher{openGame: twoSeatGame(uuid.New(), uuid.Nil)}

backend/internal/notify/encode.go

@@ -36,6 +36,7 @@ func toWireGame(g GameSummary) wire.GameView {
 		ToMove:               g.ToMove,
 		TurnTimeoutSecs:      g.TurnTimeoutSecs,
 		MultipleWordsPerTurn: g.MultipleWordsPerTurn,
+		VsAI:                 g.VsAI,
 		MoveCount:            g.MoveCount,
 		EndReason:            g.EndReason,
 		Seats:                seats,
@@ -82,6 +83,7 @@ func buildStateView(b *flatbuffers.Builder, s PlayerState) flatbuffers.UOffsetT
 		Rack:           s.Rack,
 		BagLen:         s.BagLen,
 		HintsRemaining: s.HintsRemaining,
+		WalletBalance:  s.WalletBalance,
 		Alphabet:       alphabet,
 	})
 }