Merge pull request 'Release v1.10.0: banner colours + urgent, and 3 UI fixes' (#183) from development into master

.gitea/workflows/ci.yaml

@@ -214,21 +214,9 @@ jobs:
         run: pnpm exec playwright install chromium webkit
         timeout-minutes: 5
 
-      # The offline e2e plays a real local vs_ai game, so it needs the per-variant dawgs; fetch the
-      # release the same way the Go jobs do and point the mock preview's copy step (scripts/
-      # e2e-dict.mjs, via E2E_DICT_DIR below) at it.
-      - name: Fetch dictionary DAWGs
-        run: |
-          mkdir -p "${GITHUB_WORKSPACE}/dawg"
-          curl -fsSL -o /tmp/dawg.tar.gz "https://gitea.iliadenisov.ru/developer/scrabble-dictionary/releases/download/${DICT_VERSION}/scrabble-dawg-${DICT_VERSION}.tar.gz"
-          tar xzf /tmp/dawg.tar.gz -C "${GITHUB_WORKSPACE}/dawg"
-          ls -la "${GITHUB_WORKSPACE}/dawg"
-
       - name: E2E smoke (mock)
         run: pnpm run test:e2e
         timeout-minutes: 5
-        env:
-          E2E_DICT_DIR: ${{ github.workspace }}/dawg
 
   # conformance proves the client's local move preview (the ported dawg reader +
   # validator, ui/src/lib/dict) byte-for-byte against the authoritative Go engine:
@@ -264,7 +252,6 @@ jobs:
         run: |
           go run ./backend/cmd/dictgen -dawg-dir "${GITHUB_WORKSPACE}/dawg" -out /tmp/dictgold
           go run ./backend/cmd/validategen -dawg-dir "${GITHUB_WORKSPACE}/dawg" -out /tmp/validgold
-          go run ./backend/cmd/movegen -dawg-dir "${GITHUB_WORKSPACE}/dawg" -out "${GITHUB_WORKSPACE}/movegold"
 
       - name: Set up Node
         uses: actions/setup-node@v4
@@ -284,7 +271,6 @@ jobs:
           DICT_DAWG_DIR: ${{ github.workspace }}/dawg
           DICT_GOLD_DIR: /tmp/dictgold
           DICT_VALID_DIR: /tmp/validgold
-          DICT_MOVEGEN_DIR: ${{ github.workspace }}/movegold
         run: pnpm exec vitest run src/lib/dict/
 
   # gate is the single branch-protection required check. It always runs and passes
@@ -316,13 +302,9 @@ jobs:
     # Auto test-deploy on a PR into development and on the push that merges it.
     # A PR into master is test-only (this job is skipped); prod deploy is manual.
     # Gates on `gate` (so a real test failure blocks the deploy) but runs even when
-    # some test jobs were path-skipped. Skipped entirely when neither the Go nor the
-    # UI side changed (e.g. a docs-only change): the contour image is unchanged, so
-    # there is nothing to redeploy. `changes` still defaults both to true when the
-    # diff is uncomputable, and a workflow/deploy edit forces both true, so an
-    # ambiguous or infra change still deploys as a safety net.
-    needs: [changes, gate]
-    if: ${{ (needs.changes.outputs.go == 'true' || needs.changes.outputs.ui == 'true') && ((github.event_name == 'push' && github.ref == 'refs/heads/development') || (github.event_name == 'pull_request' && github.base_ref == 'development')) }}
+    # some test jobs were path-skipped.
+    needs: [gate]
+    if: ${{ (github.event_name == 'push' && github.ref == 'refs/heads/development') || (github.event_name == 'pull_request' && github.base_ref == 'development') }}
     runs-on: ubuntu-latest
     defaults:
       run:

PLAN.md

@@ -1,598 +0,0 @@
-# PLAN — monetization implementation
-
-Technical, step-by-step implementation of the monetization domain. Business mechanics and
-the rationale for every rule live in [`docs/PAYMENTS.md`](docs/PAYMENTS.md) (RU mirror
-[`docs/PAYMENTS_ru.md`](docs/PAYMENTS_ru.md)); this file is the *how*. Each stage is written
-to be self-sufficient: returning to it gives full context — goal, exact touch-points,
-tests, done-criteria, and current status — without re-deriving decisions.
-
-## How to use this file
-
-- **Stage granularity (E0–E9) is fixed.** Do not split or merge stages. Plan each stage
-  densely enough to execute whole.
-- **Never leak stage ids into the product.** Code, comments, commit messages, PR
-  titles/descriptions must read as finalized feature copy — never "E5", "stage 3", etc.
-  Stage ids exist only in this file.
-- **Deviations are allowed** when new unknowns surface, but the plan is then edited **whole
-  and in agreement** (not piecemeal), keeping it coherent, and `docs/PAYMENTS.md` updated in
-  step.
-- **Status marks:** each stage header carries `Status: TODO | WIP | DONE`. When a stage
-  lands, flip it to DONE and note the PR. The **Progress** table is the at-a-glance index.
-- **Per-change discipline** (repo `CLAUDE.md`): update tests at the layers `docs/TESTING.md`
-  calls out, bake doc updates into the same PR, run local full verification before pushing,
-  feature branch → PR into `development`.
-
-## Progress
-
-| Stage | Title | Release | Status |
-|-------|-------|---------|--------|
-| E0 | Payments data foundation | 1 | TODO |
-| E1 | Trusted platform signal | 1 | TODO |
-| E2 | Currency + benefit core | 1 | TODO |
-| E3 | Wallet UI | 1 | TODO |
-| E4 | Durability (PITR) | 2 | TODO |
-| E5 | Payment intake | 2 | TODO |
-| E6 | Ads | 2 | TODO |
-| E7 | Admin & reports | 2 | TODO |
-| E8 | Guest limits | — | TODO |
-| E9 | Tournament fee | future | TODO |
-
-**Release 1** = full mechanics with no real money, exercised via `admin_grant` (E0→E1→E2→E3).
-**Release 2** = money (E4→E5→E6→E7). E8 is standalone (game-behaviour change, can run in
-parallel). E9 is future.
-
----
-
-## Architecture baseline (applies to all stages)
-
-Read once; individual stages assume it.
-
-### Schema & isolation
-
-- The payments domain owns its **own Postgres schema `payments`** in the shared instance
-  (`scrabble` DB). All payments tables are `payments.*`. `backend` schema is untouched
-  except for the deprecation of two legacy columns (E2).
-- **DB role.** A dedicated role owns `payments` (ALL on `payments.*`, plus `REFERENCES` on
-  `backend.accounts(account_id)` for the cross-schema FK — nothing else on `backend`). The
-  game/backend role keeps no rights on `payments`. Isolation is one-directional: payments
-  may reference accounts; the rest of the backend never touches `payments` SQL.
-- **No cross-schema writes.** Benefits move **into** `payments` (they no longer live on
-  `accounts` — see E2), so the spend transaction (ledger INSERT + balance UPDATE + benefit
-  UPDATE) is atomic **within `payments`**. The only cross-schema link is the FK
-  `payments.*.account_id → backend.accounts.account_id` (referential integrity, not a
-  write). Game code reads benefits through the payments **Go interface**, never via SQL.
-
-### Domain boundary
-
-- New package `backend/internal/payments/` — `payments.go` (types + `Service`),
-  `store.go` (`type Store struct{ db *sql.DB }`, go-jet against `internal/postgres/jet/
-  payments`), following the `ads` domain shape (`backend/internal/ads/{ads,service,store}.go`).
-- Wired in `backend/cmd/backend/main.go` `run()` (construct after `account`, before
-  `server.New`), handed into `server.Deps` (`server.go`), routes registered in
-  `registerRoutes` gated `if s.payments != nil`, admin section in `registerConsole` gated
-  `if s.payments != nil`.
-- Game/other domains depend on payments only through a **narrow interface** (e.g.
-  `AdFree(ctx, account, platform) bool`, `SpendHint(ctx, account, platform) error`,
-  `Balances(ctx, account, platform) …`). Keep the surface small; this is the seam that lets
-  payments become a separate process later without touching callers.
-
-### Migrations & codegen
-
-- Migrations: same goose dir `backend/internal/postgres/migrations/`, sequential
-  `0000N_*.sql`, `-- +goose Up/Down`, schema-qualified, **expand-contract mandatory**
-  (image rollback must stay DB-safe). First payments migration does `CREATE SCHEMA IF NOT
-  EXISTS payments`, creates the role, grants.
-- **jetgen** (`backend/cmd/jetgen/main.go`) is currently hardwired to `schema=backend`.
-  Extend it to also generate `schema=payments` into `internal/postgres/jet/payments/
-  {model,table}` (committed). Regenerate only after a payments migration; revert unrelated
-  `backend`-schema churn (jetgen may reorder untouched tables — commit only intended diffs).
-- Transactions: reuse the local `withTx(ctx, db, fn)` idiom. Balance/benefit mutations are
-  guarded single-row atomic UPDATEs (mirror `account.SpendHint`); the ledger INSERT +
-  materialized-cache UPDATE go in one `withTx`. Default Read-Committed is sufficient given
-  the guarded updates + unique idempotency keys; do not reach for Serializable without a
-  demonstrated need.
-
-### Transport
-
-- client ↔ gateway: Connect-RPC + FlatBuffers (h2c). gateway ↔ backend: REST/JSON +
-  `X-User-ID` via `gateway/internal/backendclient`. Any user-facing payments call needs the
-  full chain: backend REST handler (`u := s.user` group) → `backendclient` method →
-  Connect-RPC method + transcode (`gateway/internal/transcode/`) → FlatBuffers schema
-  (`pkg/fbs/…`, regen with `make -C pkg fbs` + `pnpm -C ui codegen`).
-- Provider webhooks (Robokassa/VK) do NOT use the Connect path — model on the existing
-  public HMAC-signed route `s.public.GET("/dl/:id/:kind", …)` (`handlers.go`): a public
-  route with signature verification, proxied by the gateway/Caddy `@gateway` matcher
-  (`deploy/caddy/Caddyfile` — a new edge route MUST be added there or it falls to the
-  landing catch-all).
-
-### Testing layers (`docs/TESTING.md`)
-
-- **unit** (Go `_test.go`, TS vitest): gate-by-context, no-ads stacking, priority draw,
-  rate math, idempotency keys, catalog snapshotting. UI logic must be extracted out of
-  `.svelte` into `ui/src/lib/*` to be unit-testable.
-- **integration** (`backend/internal/inttest/`, `//go:build integration`, Postgres-backed):
-  atomic chip↔benefit spend, callback idempotency, order-flow, TG outbox delivery, merge/
-  unlink of segments.
-- **UI** (Playwright mock e2e, Chromium+WebKit): Wallet screen, warnings, guest-hidden, GP
-  stub. Mock e2e bypasses codec — wire bugs need codec unit tests.
-- Local full verification before push: integration (`-tags=integration` + DAWG sibling +
-  Ryuk-off), UI check/test/build, codegen (`make -C pkg proto fbs`, `pnpm -C ui codegen`).
-
----
-
-## E0 — Payments data foundation
-
-**Status:** TODO · **Release 1** · depends on: none · mechanics: PAYMENTS §14, §7, §11.
-
-**Goal.** Stand up the `payments` schema, DB role, jetgen target, domain package skeleton,
-and all core tables — with nothing wired to real money yet. This is the substrate every
-later stage builds on.
-
-**Migrations (`payments` schema).**
-
-- `CREATE SCHEMA payments`; create the payments DB role + GRANTs (ALL on `payments`,
-  `REFERENCES` on `backend.accounts(account_id)`).
-- `payments.ledger` — append-only. Columns: `ledger_id` (UUIDv7 PK), `account_id` (FK →
-  `backend.accounts`), `kind` (`fund|spend|admin_grant|refund`), `source` / `origin`
-  (nullable per kind), `chips_delta` (signed; 0 for admin_grant), `product_id` (nullable,
-  FK → catalog), `order_id` (nullable, FK → orders), `provider` + `provider_payment_id`
-  (nullable), `snapshot` (JSONB of sold atoms+price for spend/grant), `created_at`. **No
-  UPDATE/DELETE ever.** Unique partial index on `(provider, provider_payment_id)` where not
-  null — the idempotency key.
-- `payments.balances` — materialized `(account_id, source)` PK, `chips int CHECK (chips >=
-  0)`, `updated_at`.
-- `payments.benefits` — materialized `(account_id, origin)` PK, `ads_paid_until timestamptz`
-  null, `ads_forever bool`, `hints int CHECK (hints >= 0)`, `updated_at`.
-- `payments.catalog_atom` — atom types (`chips|hints|noads_days|tournament`).
-- `payments.product` — `product_id`, `title`, `active bool` (soft-delete), created/updated;
-  `payments.product_item` (product → atom + quantity); `payments.product_price` (product →
-  method `vk|telegram|direct` + amount + currency — multi-currency chip packs; value
-  products carry a single chips price).
-- `payments.chip_rate` / rewarded payout config — either dedicated rows or a small
-  `payments.config` KV (frequency cooldowns, rewarded payout, pending-expiry). Pick one and
-  document it here at implementation.
-- `payments.order` — `order_id` (UUIDv7 PK), `account_id`, `platform`, `product_id`,
-  `expected_amount` + currency, `origin`, `status` (`pending|paid|expired`), `provider`,
-  `provider_payment_id` (nullable), timestamps. Index for the pending-expiry sweep.
-- `payments.payment_event` — `event_id`, `account_id`, `order_id` (nullable), `type`
-  (`succeeded|failed|refunded`), `payload`, `created_at`, `dispatched_at` (nullable).
-
-**Backend.**
-
-- `backend/internal/payments/` package skeleton: `Store` + `Service` + a `withTx` helper.
-  No handlers wired yet beyond a health-style no-op — this stage is schema + package.
-- Extend `cmd/jetgen` to generate `payments` schema → `internal/postgres/jet/payments/`;
-  commit generated code.
-
-**Legacy deprecation (expand phase only).** Add a migration comment/marker that
-`accounts.hint_balance` and `accounts.paid_account` are deprecated; do NOT drop yet (drop is
-the contract phase, after E2 reads/writes the new tables and after Release 2). Reads still
-use the old columns until E2 flips them.
-
-**Tests.**
-
-- integration: schema/role created; role cannot read `backend`-only tables and vice-versa;
-  ledger rejects UPDATE/DELETE (trigger or role privilege); idempotency unique index holds;
-  FK to `backend.accounts` enforced; balance/benefit CHECKs hold.
-- unit: none material yet (logic arrives in E2).
-
-**Done-criteria.** Migrations apply cleanly forward+backward on a throwaway PG (jetgen path
-proves this); `go build ./backend/...` + `go vet` + `gofmt -l .` clean; committed jet code
-for `payments`; integration tests green; no behaviour change for users.
-
-**Notes/risks.** jetgen may reorder untouched `backend` tables — revert that churn, commit
-only the `payments` additions. Keep the `payments` role creation idempotent (`IF NOT
-EXISTS` / `DO $$`), since migrations re-run on fresh volumes.
-
----
-
-## E1 — Trusted platform signal
-
-**Status:** TODO · **Release 1** · depends on: none (parallel to E0) · mechanics: PAYMENTS §8.
-
-**Goal.** Make the server know the execution platform from a trusted, unforgeable source,
-carried on the session and re-confirmed each cold start. This is the foundation the gate
-(E2) stands on; without it the gate is meaningless.
-
-**Model.** `platform = {kind: vk|telegram|direct, subtype: ios|android|web}` becomes a
-property of the **session**. On cold start the client submits the fresh wrapper signature
-(VK launch-params `sign` / TG `initData`); the gateway (or backend session-resolve)
-validates it and records/refreshes the session's platform. `direct` needs no signature — it
-is implied by a web/native session's creation path.
-
-**Backend.**
-
-- Session store (`backend/internal/session/`): add `platform` (kind+subtype) to the session
-  row + `Session` struct; set it at creation and refresh it on a validated cold-start call.
-- Session resolve (`handlers_auth.go handleResolveSession` → `resolveResponse` DTO
-  `dto.go`): return `platform` so the gateway can carry it.
-- Validation: TG `initData` validator already exists (`platform/telegram/internal/initdata`)
-  — reuse. Add VK launch-params `sign` verification (HMAC over sorted params with the VK app
-  secret) — new small verifier, unit-tested against known VK vectors.
-- Gateway (`gateway/internal/backendclient`): inject a trusted `X-Platform` header (mirror
-  `X-User-ID` injection in `client.go do()`), sourced from the resolved session — never from
-  the client request body.
-- Backend middleware: read `X-Platform` into context alongside `X-User-ID`
-  (`middleware.go`); expose a typed accessor `platform(c)`.
-- **Fail-closed default:** absent/invalid/stale platform ⇒ context = untrusted; the payments
-  interface treats untrusted as "view only" (enforced in E2's gate, but the signal plumbing
-  lands here).
-
-**Client (`ui/`).** On cold start, submit the wrapper signature to the session-establish/
-refresh call: VK via `ui/src/lib/vk.ts` (launch params), TG via `ui/src/lib/telegram.ts`
-(`initData`). `direct` submits nothing (web/native). Compose the platform from
-`insideVK()` + `insideTelegram()` + `clientChannel()` + `vkPlatform()` (no single
-discriminator exists today — see `ui/src/lib/channel.ts`, note VK reads as `web` there).
-
-**Tests.**
-
-- unit (Go): VK sign verifier accepts valid / rejects tampered params; TG initData path
-  (existing) covered; platform kind+subtype derivation.
-- integration: session carries platform; resolve returns it; stale/absent → untrusted.
-- UI: cold start submits the right signature per wrapper (mock).
-
-**Done-criteria.** A VK/TG session resolves to a trusted `{kind,subtype}`; a forged body
-cannot change it; `direct` sessions resolve to `direct`; untrusted path is reachable and
-observable. No user-visible change.
-
-**Notes/risks.** VK iOS must surface as `subtype=ios` (drives the frozen state in E2/E3).
-Old sessions predating this stage have no platform → untrusted → fail-closed (acceptable;
-re-cold-start fixes it). Keep the VK app secret in config/secret store, not code.
-
----
-
-## E2 — Currency + benefit core
-
-**Status:** TODO · **Release 1** · depends on: E0, E1 · mechanics: PAYMENTS §2–§6, §11.
-
-**Goal.** The full internal money mechanic, exercisable end-to-end **without real money**
-via `admin_grant`: chip balances, spend→benefit atomically, the compliance gate by context,
-benefit application (no-ads stacking, hints per-origin), the legacy migration, and the
-`SpendHint` rewrite. This is the heart.
-
-**Payments service (Go).**
-
-- `Balances(ctx, account, platform)` → the segments spendable in the platform's context
-  (VK→vk; TG→tg; direct→direct+vk+tg; VK-iOS→frozen/view; untrusted→none).
-- `Spend(ctx, account, platform, productID)` → gate-checked purchase of a value with chips:
-  resolve spendable segments by context, draw by priority (direct→vk→tg on web), write a
-  `spend` ledger row + decrement balance + apply benefit (extend `ads_paid_until[origin]`
-  from `max(now,end)` / set `ads_forever` / add hints) **in one tx**, stamping `origin` =
-  platform context. Refuse if untrusted (fail-closed) or funds insufficient.
-- `Grant(ctx, account, origin, atoms)` → `admin_grant` ledger row (price 0, concrete values
-  only, never chips), same benefit application; origin chosen by the admin (E7 UI; here the
-  service method + an internal/admin entrypoint).
-- `AdFree(ctx, account, platform)` / `HintsAvailable(ctx, account, platform)` /
-  `SpendHint(ctx, account, platform)` → apply the one-directional origin rule: in context P,
-  usable origins = {P} plus, when P is web/native, {vk,tg} (relaxation outward); in VK only
-  vk; in TG only tg.
-- `Merge` / `Unlink` hooks: extend `accountmerge` to merge segments+benefits by origin
-  (same-origin add, different coexist), and make segment availability follow identity
-  presence (unlink → sleep, re-link → wake). Warn-before-unlink is a UI concern (surface the
-  balance via the interface).
-
-**Backend wiring & migration.**
-
-- Deprecate-and-flip `accounts.hint_balance` / `accounts.paid_account`: E0 added the tables;
-  here, move reads/writes to `payments.benefits`. `SpendHint` (`game/service.go` ~:1147) and
-  `ads.Eligible` (`ads/ads.go` :107) call the payments interface instead of the account
-  columns. Legacy values were never set in prod → zero them; the DROP is the contract phase
-  (guarded, after Release 2 — keep columns until then for rollback safety).
-- `vs_ai` hints stay free/unlimited (unchanged 30-min gate); only online-game hint spend
-  routes through the segmented, context-aware path.
-
-**API (user-facing, Connect chain).** Read-only wallet view + spend:
-`GET /api/v1/user/wallet` (balances+benefits for the context), `POST /api/v1/user/wallet/
-buy` (spend chips on a product). Add the backend handlers (`u := s.user`), `backendclient`
-methods, Connect methods + transcode + FBS. Admin grant is internal/admin (E7 UI).
-
-**Tests.**
-
-- unit (Go): gate-by-context matrix (every row of PAYMENTS §4); priority draw; no-ads
-  stacking (`+=` from max(now,end)) + forever override; per-origin hint applicability;
-  merge/unlink segment math.
-- integration: atomic spend (ledger+balance+benefit in one tx; failure rolls all back);
-  admin_grant credits values not chips; legacy migration zeroes and flips reads; merge/
-  unlink over Postgres.
-- UI: none new (E3 builds the screen); wallet DTO covered by codec unit tests.
-
-**Done-criteria.** With chips seeded via `admin_grant`, a user can buy no-ads/hints; the gate
-blocks cross-context spend and cross-origin application; ads gate reads the new benefit;
-`SpendHint` uses segments; all layers green; **compliance regression** (a `direct` benefit
-never activates inside VK/TG) is a named test.
-
-**Notes/risks.** This is the high-blast-radius core (money semantics + a live path
-`SpendHint`/`ads.Eligible`). Minimize surface, keep the interface narrow, no mixed-in
-refactors. The legacy flip is expand-contract: reads move first, DROP much later.
-
----
-
-## E3 — Wallet UI
-
-**Status:** TODO · **Release 1** · depends on: E2 · mechanics: PAYMENTS §1, §7, §6, §13, §4.
-
-**Goal.** The user-facing "Кошелёк" (Wallet) section: balances + active benefits + the
-catalog storefront, honouring guest-hidden, GP-stub, and the web-spend warning.
-
-**UI (`ui/`).**
-
-- New `'wallet'` tab in `ui/src/screens/SettingsHub.svelte` — `SettingsTab` union, tab
-  button **between Friends (:65) and About (:66)**, body branch in the `:42-51` switch,
-  `'wallet'` route in `ui/src/lib/routeparse.ts` + `ui/src/App.svelte`. Reuse the hub's
-  guest/offline gating.
-- `Wallet.svelte` screen: **minimal** — context-available chip balances + active benefits
-  (no-ads until date, hints count). **No history feed** (PAYMENTS §11 — noise). Storefront:
-  products from the configurable catalog, prices in chips (values) / per-method (chip packs).
-- **Guest:** section hidden entirely (durable-only).
-- **GP build:** purchase CTA replaced by a stub ("install the RuStore build to make
-  purchases"); rewarded + spending earned chips still work. Detect the GP native build.
-- **Web-spend warning:** before spending vk/tg chips in a web/native (direct) context, show
-  an own `Modal` (not `showPopup` — that eats the user-activation gesture) warning the value
-  will be web/native-only.
-- Extract all logic into `ui/src/lib/*` (unit-testable); keep `.svelte` thin.
-
-**Tests.**
-
-- unit (vitest): storefront/price formatting, context-available-segment selection, warning
-  trigger condition.
-- UI (Playwright mock, Chromium+WebKit): Wallet renders between Friends/About; guest hides
-  it; GP stub; warning modal on web vk/tg spend. Mock overlay must stay instant under
-  `MODE==='mock'` (or it intercepts taps).
-
-**Done-criteria.** Owner can review the Wallet on the deployed test contour (visual sign-off
-is on the contour, not local); balances/benefits/storefront correct per context; guest/GP/
-warning paths verified. Release 1 is now demonstrable end-to-end via `admin_grant`.
-
-**Notes/risks.** No global `.btn`/`.ghost` in `ui/` — style per-component with scoped CSS +
-tokens (mirror NewGame `.invite` for a CTA). Svelte whitespace/`$state` naming gotchas
-apply. iOS WebView download/gesture caveats are irrelevant here (no file delivery).
-
----
-
-## E4 — Durability (PITR)
-
-**Status:** TODO · **Release 2** · depends on: E0 (schema exists) · mechanics: PAYMENTS §14.
-
-**Goal.** Continuous WAL archiving with point-in-time recovery, armed **before the first
-real money** is accepted (E5 prod). Protects both money and game data.
-
-**Work.**
-
-- Add WAL archiving to the prod Postgres (pgBackRest or WAL-G): base backups + continuous
-  WAL to a second host or object storage. Wire into `deploy/` (compose/prod overlay +
-  ansible `deploy/ansible/`), config + secrets under the `PROD_` prefix.
-- Restore runbook in `deploy/README.md`: base + WAL replay to a timestamp; test the restore
-  on a scratch target.
-- Keep the existing migration-time `pg_dump` (`deploy/prod-deploy.sh`) as belt-and-braces.
-
-**Mandatory pre-prod assessment (owner-required, gates the Release 2 prod rollout).**
-Before the first money goes live, produce and record here:
-
-1. **Disk-storage cost estimate** for the WAL archive + base backups (retention window ×
-   WAL volume; account for both hosts / object-storage pricing). This can change hosting
-   sizing.
-2. **PG performance-degradation assessment** from continuous archiving (write amplification,
-   archive_command latency, backup I/O contention) on the prod-sized instance.
-
-Neither blocks building the plan, but both **must** be completed and reviewed before the
-prod release — surface the numbers to the owner (they may change host settings).
-
-**Tests.** Restore drill on a scratch instance (base + WAL → target timestamp) documented
-and passing. No app-level tests.
-
-**Done-criteria.** WAL archiving live on prod PG; a timed restore verified; cost + perf
-assessment recorded and owner-reviewed; runbook in `deploy/README.md`.
-
-**Notes/risks.** The tg host is weak (1 vCPU) — if the archive lands there, watch
-contention. Migrations stay expand-contract so image rollback remains DB-safe alongside PITR.
-
----
-
-## E5 — Payment intake
-
-**Status:** TODO · **Release 2** · depends on: E0, E1, E2, E4 · mechanics: PAYMENTS §9, §12.
-
-**Goal.** Accept real money on all three rails into the payments domain: order-flow,
-verified provider callbacks, idempotency, the TG bot SQLite outbox, the event dispatcher,
-receipts, and refunds.
-
-**Order-flow & intake (single writer).**
-
-- `POST /api/v1/user/wallet/order` → create `order(pending)` (account/platform/product/
-  expected amount/origin), return the provider-specific launch payload with `order_id`
-  threaded in (Robokassa `InvId` / TG `invoice_payload` / VK `item`).
-- Robokassa + VK **public webhooks**: new edge routes (add to `deploy/caddy/Caddyfile`
-  `@gateway` matcher — or they fall to the landing catch-all), signature/HMAC verified,
-  proxied into a payments intake handler. Match by `order_id`, verify amount, credit
-  (ledger `fund` + balance UPDATE in one tx), mark order `paid`, emit `payment_event`.
-  Idempotent by `(provider, provider_payment_id)`.
-- **Pending sweep:** background reaper expires pending orders after the configured timeout
-  (~30 min). Expiry is cosmetic — a later valid callback still credits (revive/honour).
-
-**TG bot outbox (`platform/telegram/`).**
-
-- The bot receives `successful_payment` (and `pre_checkout_query`) via Bot API. Add a
-  **SQLite** store on the bot's disk: on receipt, persist → ack the Telegram update → forward
-  to a backend payments-intake endpoint (internal, authenticated over the existing reverse
-  mTLS bot-link) → on backend ack, mark `forwarded`. Retries with backoff; re-drive
-  undelivered on restart. Backend intake dedups by `telegram_payment_charge_id`.
-- Provide the invoice creation path (Stars) from the Mini App via the bot as needed.
-
-**Events & notifications.**
-
-- `payment_events` dispatcher: `succeeded`/`failed`/`refunded` → live gRPC stream if the
-  user is connected, else `botlink` push / email relay (existing). "failed" = an active
-  provider decline (not an abandoned pending) surfaced to the user; "succeeded" hook
-  (email/bot message).
-
-**Receipts (§12).** Robokassa self-employed НПД receipt on payment (provider config); VK
-handles Votes tax itself; TG Stars — no receipt.
-
-**Refunds (§9).** ToS non-refundable; admin manual refund (ties to `accountdelete`); external
-`refunded` events honoured — best-effort benefit revoke (never negative; record loss + abuse
-flag if spent), ledger `refund` row. Ledger export-ready (reconciliation not built).
-
-**Tests.**
-
-- unit: signature/HMAC verifiers per rail; order-id matching; idempotency-key dedup.
-- integration: full order→callback→credit per rail; duplicate callback credits once; expired
-  order still honoured on late callback; TG outbox store→forward→ack→cleanup + restart
-  re-drive; refund revoke best-effort/never-negative.
-- UI: purchase flow reaches the provider launch (mock); success/failure surfaced.
-
-**Done-criteria.** A real (sandbox) payment on each rail credits chips exactly once; a
-replayed callback does not double-credit; the TG outbox survives a bot restart mid-flight;
-failed/succeeded events reach the user; refund path exercised. **PITR (E4) armed and the
-cost/perf assessment reviewed before this goes to prod.**
-
-**Notes/risks.** Manual `docker run -p` boot tests fail from the shell — verify the runnable
-artifact via the testcontainers integration suite. Distroless services run UID 65532;
-bind-mounted secrets must be 0644. Edge routes silently fall through if not added to the
-Caddyfile — add a CI probe. The prod rolling deploy skips caddy on config-only changes —
-force-recreate when the Caddyfile changes.
-
----
-
-## E6 — Ads
-
-**Status:** TODO · **Release 2** · depends on: E2 (chips), E5 (rewarded credits via intake) ·
-mechanics: PAYMENTS §10.
-
-**Goal.** VK video ads: the post-move interstitial (frequency-gated) and the rewarded video
-(credits chips via server verify), plus extending the existing banner suppression to
-per-origin.
-
-**Work.**
-
-- **Provider abstraction:** a small ads-network interface (VK impl now) so a future network
-  for other platforms slots in without rework. VK integration via `ui/src/lib/vk.ts`.
-- **Rewarded:** voluntary view → the network's **server verify callback** → payments intake
-  credits chips to the `vk` segment (client not believed, like a payment). On-launch
-  anti-fraud = provider verify only (no own daily cap; abstraction allows later).
-- **Interstitial** (post-move fullscreen), configurable server values (from `payments`
-  config): global per-user cooldown across all games (default 5 min); `vs_ai` 30 min; a hint
-  application triggers a post-move interstitial independently with its own 1-min cooldown;
-  offline banner-only; respect VK's own frequency caps. Cooldown state tracked server-side
-  (per user) or client-mirrored from a server value — pick and document at implementation.
-- **Banner suppression:** extend `ads.Eligible` (`backend/internal/ads/ads.go` :107) to gate
-  on the **origin benefit applicable in the current context** (E2 interface) instead of the
-  single legacy flag. No-ads suppresses banner + interstitial; rewarded never suppressed.
-
-**Tests.**
-
-- unit: cooldown logic (global 5m / vs_ai 30m / hint-trigger 1m independence); rewarded
-  credit path; banner eligibility per context.
-- integration: rewarded verify → credit exactly once (idempotent like a payment).
-- UI: interstitial shows/respects cooldown (mock); rewarded button; no-ads hides banner +
-  interstitial; rewarded still available under no-ads.
-
-**Done-criteria.** VK rewarded credits chips once per verified view; interstitial respects
-all cooldowns incl. the hint trigger; no-ads suppresses banner+interstitial but not
-rewarded; offline shows banner only.
-
-**Notes/risks.** Crypto-payout networks stay rejected. Rewarded-without-payout is pointless —
-only enable where the network pays (VK). Keep the interstitial frequency as server config so
-it tunes without a store release.
-
----
-
-## E7 — Admin & reports
-
-**Status:** TODO · **Release 2** · depends on: E2 (ledger/grant), E5 (payments/refunds) ·
-mechanics: PAYMENTS §11.
-
-**Goal.** The admin console financial surface: per-user report, admin grant UI, manual
-refund UI, ledger export.
-
-**Work (`/_gm`, `backend/internal/server/handlers_admin_console.go` + `adminconsole/`).**
-
-- **Per-user financial panel** on the existing user card (`consoleUserDetail` :343,
-  `UserDetailView`): segment balances, payments, spends, grants, refunds, full history —
-  read from the append-only ledger + materialized cache.
-- **Admin grant** action (mirror the existing `POST /_gm/users/:id/grant-hints`): grant
-  concrete values (no-ads days / hints), **origin picker**, **never chips**; writes an
-  `admin_grant` ledger row (E2 `Grant`).
-- **Manual refund** action: admin-initiated refund of a specific order (ties to the refund
-  path); records a `refund` ledger row; best-effort benefit revoke.
-- **Ledger export**: CSV/JSON export of the ledger for tax reporting + future Robokassa
-  reconciliation (export-ready schema; reconciliation itself not built).
-- Auth unchanged: gateway Basic-Auth in front of `/_gm` + backend same-origin CSRF on POSTs.
-
-**Tests.**
-
-- unit: report view assembly; grant refuses chips; export shape.
-- integration: grant/refund write correct ledger rows; report reflects balances+history.
-
-**Done-criteria.** An operator can see a user's full financial picture, grant concrete
-values (origin-picked, never chips), issue a manual refund, and export the ledger.
-
-**Notes/risks.** `/_gm` per-user detail already surfaces `PaidAccount`/`HintBalance` — replace
-those with the segmented view as the legacy columns retire.
-
----
-
-## E8 — Guest limits
-
-**Status:** TODO · **standalone** (game-behaviour change; can run in parallel) · depends on:
-none · mechanics: PAYMENTS §6.
-
-**Goal.** A registration funnel: cap what a guest can do, enforced **server-side** (today the
-gating is UI-only).
-
-**Finding (verified).** The friend/invitation paths do **not** check `is_guest` on the
-server — only the UI hides them: `social/friends.go:50` `SendFriendRequest`,
-`robotfriends.go:41` `RequestInGame`, `friendcodes.go:67` `RedeemFriendCode`,
-`lobby/invitations.go:208` `CreateInvitation`. A guest with a valid `X-User-ID` can call them
-in the UI's stead.
-
-**Work.**
-
-- **Server guest gate** on friend-request / redeem-code / invitation-create: refuse when the
-  caller `is_guest` (add an `ErrGuestForbidden`-style guard, as `feedback` already has).
-- **Active-game limits** for guests: at most **1 random-opponent game + 1 vs_ai** concurrently
-  (enforce on game/invitation creation in `lobby`/`game`; today no such limit exists).
-- Keep the existing UI gating; this adds the server as the source of truth.
-
-**Tests.**
-
-- integration: guest is refused friend/redeem/invitation server-side; guest blocked from a
-  2nd random / 2nd vs_ai; durable account unaffected.
-- UI: guest sees the funnel (existing hides + any new messaging).
-
-**Done-criteria.** Guests are server-limited to 1 random + 1 vs_ai and cannot friend/invite;
-durable accounts unchanged; regression that this does not break existing durable flows.
-
-**Notes/risks.** This changes existing game behaviour — its own tests, its own PR, no
-mixed-in payments changes. Decide whether a guest may finish an already-started game (limit
-on creation, not mid-game) at implementation and record it here.
-
----
-
-## E9 — Tournament fee (future)
-
-**Status:** TODO · **future** · depends on: E0 (atom provisioned), tournament feature ·
-mechanics: PAYMENTS §5, §7.
-
-**Goal.** Charge a chip entry fee for tournaments. The `tournament` atom + a catalog product
-are provisioned in E0/E7; the spend mechanic reuses E2 (`Spend`). The actual tournament
-feature and its coupling to entry are out of scope until the tournament feature exists.
-
-**Done-criteria.** Deferred — revisit when tournaments are built.
-
----
-
-## Verification & CI (all stages)
-
-- Per-stage tests at the layers above; **compliance-gate regression is mandatory** (a
-  `direct` benefit must never activate inside VK/TG) and runs from E2 onward.
-- Local full verification before every push: `go build/vet ./backend/... && gofmt -l .`,
-  integration (`-tags=integration` + DAWG sibling + Ryuk-off), `pnpm -C ui check/test:unit/
-  build`, Playwright mock e2e, codegen (`make -C pkg proto fbs`, `pnpm -C ui codegen`).
-- Contour: each PR into `development` auto-deploys the test contour; owner does visual sign-
-  off there (not local). Keep a multi-PR batch a linear stack (one shared contour,
-  last-deploy-wins).
-- Prod (Release 2): expand-contract migrations only (image rollback DB-safe); PITR armed +
-  the E4 cost/perf assessment reviewed **before** the first money; new edge routes added to
-  the Caddyfile with a CI probe; caddy force-recreated on config-only changes.
-- Release framing: **shipped docs/code/commits/PRs carry no stage ids** — finalize copy for
-  the release, not the plan.

backend/cmd/backend/main.go

@@ -12,6 +12,7 @@ import (
 	"fmt"
 	"log"
 	"os/signal"
+	"strings"
 	"syscall"
 	"time"
 
@@ -215,9 +216,11 @@ func run(ctx context.Context, cfg config.Config, logger *zap.Logger) error {
 	// Operator alert emails on new feedback / word complaints, coalesced into one digest
 	// per interval. Inert unless a distinct admin sender and recipient are configured.
 	if cfg.SMTP.AdminFrom != "" && cfg.SMTP.AdminTo != "" {
-		// The alert digest carries no admin-console link on purpose — an admin URL must not
-		// travel in an email (a mail provider could cache or index it); see adminalert.New.
-		alerts := adminalert.New(mailer, feedbackSvc, games, cfg.SMTP.AdminFrom, cfg.SMTP.AdminTo, logger)
+		consoleURL := ""
+		if cfg.PublicBaseURL != "" {
+			consoleURL = strings.TrimRight(cfg.PublicBaseURL, "/") + "/_gm"
+		}
+		alerts := adminalert.New(mailer, feedbackSvc, games, cfg.SMTP.AdminFrom, cfg.SMTP.AdminTo, consoleURL, logger)
 		go alerts.Run(ctx, adminAlertInterval)
 		logger.Info("admin alert worker started", zap.Duration("interval", adminAlertInterval))
 	}

backend/cmd/movegen/main.go

@@ -1,417 +0,0 @@
-// Command movegen emits golden conformance fixtures for the client-side move
-// generator port (ui/src/lib/dict). It is a dev tool, run by hand; its output is
-// committed so the TypeScript parity tests run without a Go toolchain.
-//
-// For each small sample dictionary (English and Russian — the latter reaches
-// alphabet index 32, exercising the 33-letter cross-set boundary) it writes:
-//
-//   - sample_<tag>.dawg           the serialized dictionary (the reader/cursor fixture)
-//   - sample_<tag>.words.json     the stored words + their alphabet indexes
-//   - sample_<tag>.gen.json       ranked move-generation results from the real solver,
-//     for a handful of positions, plus the ruleset the TS
-//     side rebuilds to score identically
-//
-// Positions are built with only the solver's public API: an empty board, and
-// two-ply positions reached by applying the solver's own top move (so no internal
-// encoding is needed). Regenerate with:
-//
-//	go run ./backend/cmd/movegen -out ui/src/lib/dict/testdata
-package main
-
-import (
-	"bytes"
-	"encoding/json"
-	"flag"
-	"log"
-	"os"
-	"path/filepath"
-	"strings"
-
-	"gitea.iliadenisov.ru/developer/scrabble-solver/board"
-	"gitea.iliadenisov.ru/developer/scrabble-solver/rack"
-	"gitea.iliadenisov.ru/developer/scrabble-solver/rules"
-	"gitea.iliadenisov.ru/developer/scrabble-solver/scrabble"
-	dawg "github.com/iliadenisov/dafsa"
-)
-
-// sampleWordsEN is the English sample dictionary, in strictly increasing
-// alphabet-index order (the builder requires it). Shared prefixes (car/care/cars),
-// shared suffixes (cats/dogs), internal-final nodes (do, an) and a one-letter word.
-var sampleWordsEN = []string{
-	"a", "an", "and", "ant",
-	"car", "care", "cared", "cares", "cars", "cat", "cats",
-	"do", "doe", "does", "dog", "dogs", "done", "dot",
-}
-
-// sampleWordsRU is the Russian sample dictionary, in strictly increasing index
-// order. It deliberately includes words starting with я (index 32) so the ported
-// cross-set handles alphabet indexes past JS's 31-bit shift boundary.
-var sampleWordsRU = []string{"ад", "ар", "оса", "я", "яд", "яр"}
-
-// sampleFixture is the JSON committed with the .dawg so the TypeScript cursor test
-// knows the exact word set (as alphabet indexes) to expect from enumeration.
-type sampleFixture struct {
-	Alphabet string   `json:"alphabet"`
-	NumAdded int      `json:"numAdded"`
-	Words    []string `json:"words"`
-	Indexes  [][]int  `json:"indexes"`
-}
-
-// genFixture is the move-generation golden set for one sample dictionary.
-type genFixture struct {
-	Ruleset genRuleset `json:"ruleset"`
-	Cases   []genCase  `json:"cases"`
-}
-
-// genRuleset is the scoring data the TS side rebuilds so evaluate() matches the Go
-// solver: letter values, premium multipliers per square, the centre, rack size and bonus.
-type genRuleset struct {
-	Size       int     `json:"size"`
-	Cols       int     `json:"cols"`
-	Center     int     `json:"center"`
-	RackSize   int     `json:"rackSize"`
-	Bingo      int     `json:"bingo"`
-	Values     []int   `json:"values"`
-	LetterMult [][]int `json:"letterMult"`
-	WordMult   [][]int `json:"wordMult"`
-}
-
-// genTile is one placed tile (a board tile or a move placement).
-type genTile struct {
-	Row    int  `json:"row"`
-	Col    int  `json:"col"`
-	Letter int  `json:"letter"`
-	Blank  bool `json:"blank"`
-}
-
-// genRack is a rack as a multiset of letter indexes plus a blank count.
-type genRack struct {
-	Letters []int `json:"letters"`
-	Blanks  int   `json:"blanks"`
-}
-
-// genMove is one ranked generated play: its orientation, placed tiles and total score.
-type genMove struct {
-	Dir   int       `json:"dir"`
-	Tiles []genTile `json:"tiles"`
-	Score int       `json:"score"`
-}
-
-// genCase is one generation position: the tiles already on the board (empty when
-// none), the rack, the mode/rule and the ranked moves the solver returns.
-type genCase struct {
-	Name             string    `json:"name"`
-	Placed           []genTile `json:"placed"`
-	Rack             genRack   `json:"rack"`
-	Mode             int       `json:"mode"`
-	IgnoreCrossWords bool      `json:"ignoreCrossWords"`
-	Moves            []genMove `json:"moves"`
-}
-
-func main() {
-	out := flag.String("out", "ui/src/lib/dict/testdata", "output directory for fixtures")
-	dawgDir := flag.String("dawg-dir", "", "when set, emit real-dictionary move-gen golden from the .dawg files in this dir (conformance mode) instead of the committed samples")
-	flag.Parse()
-
-	if err := os.MkdirAll(*out, 0o755); err != nil {
-		log.Fatalf("movegen: mkdir %s: %v", *out, err)
-	}
-
-	if *dawgDir != "" {
-		buildReal(*dawgDir, *out)
-		return
-	}
-
-	emitRulesets()
-
-	buildSample(*out, "en", rules.English(), sampleWordsEN, []genCase{
-		emptyCase("empty-cared", englishRack("caredts", 0), scrabble.Both, false),
-		emptyCase("empty-dogs", englishRack("dogsent", 0), scrabble.Both, false),
-		emptyCase("empty-blank", englishRack("caret", 1), scrabble.Both, false),
-		emptyCase("empty-single-word", englishRack("caredts", 0), scrabble.Both, true),
-	})
-
-	buildSample(*out, "ru", rules.RussianScrabble(), sampleWordsRU, []genCase{
-		emptyCase("empty-yad", russianRack("ядрасо", 0), scrabble.Both, false),
-	})
-}
-
-// buildSample writes the dawg, the word fixture and the generation golden set for
-// one sample dictionary. Two-ply cases are appended: the solver's own top move from
-// the first non-empty result is applied, then generation runs again on the new rack.
-func buildSample(out, tag string, rs *rules.Ruleset, words []string, cases []genCase) {
-	idx := rs.Alphabet
-	b := dawg.New(idx)
-	indexes := make([][]int, 0, len(words))
-	for _, w := range words {
-		if err := b.Add(w); err != nil {
-			log.Fatalf("movegen[%s]: add %q: %v", tag, w, err)
-		}
-		enc, err := idx.Encode(w)
-		if err != nil {
-			log.Fatalf("movegen[%s]: encode %q: %v", tag, w, err)
-		}
-		ints := make([]int, len(enc))
-		for i, x := range enc {
-			ints[i] = int(x)
-		}
-		indexes = append(indexes, ints)
-	}
-	finder := b.Finish()
-
-	writeJSON(filepath.Join(out, "sample_"+tag+".words.json"), sampleFixture{
-		Alphabet: tag, NumAdded: finder.NumAdded(), Words: words, Indexes: indexes,
-	})
-	dawgPath := filepath.Join(out, "sample_"+tag+".dawg")
-	if _, err := finder.Save(dawgPath); err != nil {
-		log.Fatalf("movegen[%s]: save %s: %v", tag, dawgPath, err)
-	}
-
-	s := scrabble.NewSolver(rs, finder)
-	for i := range cases {
-		runCase(s, rs, &cases[i], nil)
-	}
-	// A two-ply position from the first standard case that produced a move.
-	if two := twoPly(s, rs, cases); two != nil {
-		cases = append(cases, *two)
-	}
-
-	writeJSON(filepath.Join(out, "sample_"+tag+".gen.json"), genFixture{
-		Ruleset: rulesetOf(rs), Cases: cases,
-	})
-	log.Printf("movegen[%s]: %d words, %d cases", tag, finder.NumAdded(), len(cases))
-}
-
-// realVariant maps a shipped dictionary file to the ruleset that scores it and the racks
-// the conformance positions use. smallRack/blankRack keep the first-move (empty board)
-// lists bounded on a dense dictionary; fullRack drives a deep 7-tile mid-game position,
-// kept small by the anchors around the already-placed word.
-type realVariant struct {
-	file, variant, smallRack, blankRack, fullRack string
-	rs                                            *rules.Ruleset
-}
-
-// buildReal emits move-generation golden from the real shipped dictionaries in dawgDir —
-// the full alphabets and deep graphs the tiny samples cannot reach — one
-// <variant>.movegen.json per variant. Like the dictgen/validategen vectors it is
-// regenerated in CI and never committed, so it pins no dictionary version into the repo.
-func buildReal(dawgDir, out string) {
-	reals := []realVariant{
-		{"en_sowpods", "scrabble_en", "aine", "ain", "aeinrst", rules.English()},
-		{"ru_scrabble", "scrabble_ru", "аеин", "аен", "аеиноср", rules.RussianScrabble()},
-		{"ru_erudit", "erudit_ru", "аеин", "аен", "аеиноср", rules.Erudit()},
-	}
-	for _, v := range reals {
-		data, err := os.ReadFile(filepath.Join(dawgDir, v.file+".dawg"))
-		if err != nil {
-			log.Fatalf("movegen[%s]: read dawg: %v", v.variant, err)
-		}
-		finder, err := dawg.Read(bytes.NewReader(data), 0)
-		if err != nil {
-			log.Fatalf("movegen[%s]: parse dawg: %v", v.variant, err)
-		}
-		s := scrabble.NewSolver(v.rs, finder)
-
-		cases := []genCase{
-			emptyCase("first-move", encRack(v.rs, v.smallRack, 0), scrabble.Both, false),
-			emptyCase("first-move-blank", encRack(v.rs, v.blankRack, 1), scrabble.Both, false),
-		}
-		for i := range cases {
-			runCase(s, v.rs, &cases[i], nil)
-		}
-		// A deep 7-tile mid-game: place the top first move, then generate again. The
-		// anchors around the placed word bound the list while still exercising a full rack,
-		// deep left/right extension and wide cross-sets over the real graph.
-		full := encRack(v.rs, v.fullRack, 0)
-		b := board.New(v.rs.Rows, v.rs.Cols)
-		if m1 := s.GenerateMovesOpts(b, toRack(v.rs.Size(), full), scrabble.Both, scrabble.PlayOptions{}); len(m1) > 0 {
-			mid := genCase{Name: "mid-game", Rack: full, Mode: int(scrabble.Both)}
-			runCase(s, v.rs, &mid, tilesOf(m1[0].Tiles))
-			cases = append(cases, mid)
-		}
-
-		writeJSON(filepath.Join(out, v.variant+".movegen.json"), genFixture{Ruleset: rulesetOf(v.rs), Cases: cases})
-		total := 0
-		for _, c := range cases {
-			total += len(c.Moves)
-		}
-		_ = finder.Close()
-		log.Printf("movegen[%s]: %d cases, %d golden moves", v.variant, len(cases), total)
-	}
-}
-
-// encRack encodes a rack given as the variant's letters (plus a blank count) into the
-// index-based genRack the fixtures carry.
-func encRack(rs *rules.Ruleset, letters string, blanks int) genRack {
-	enc, err := rs.Alphabet.Encode(letters)
-	if err != nil {
-		log.Fatalf("movegen: encode rack %q: %v", letters, err)
-	}
-	idx := make([]int, len(enc))
-	for i, b := range enc {
-		idx[i] = int(b)
-	}
-	return genRack{Letters: idx, Blanks: blanks}
-}
-
-// runCase fills a case's Moves by generating on a board holding the given placed
-// tiles (nil = empty board).
-func runCase(s *scrabble.Solver, rs *rules.Ruleset, c *genCase, placed []genTile) {
-	bd := board.New(rs.Rows, rs.Cols)
-	for _, t := range placed {
-		bd.Set(t.Row, t.Col, cellByte(t.Letter, t.Blank))
-	}
-	c.Placed = placed
-	rk := toRack(rs.Size(), c.Rack)
-	moves := s.GenerateMovesOpts(bd, rk, scrabble.Mode(c.Mode), scrabble.PlayOptions{IgnoreCrossWords: c.IgnoreCrossWords})
-	c.Moves = movesOf(moves)
-}
-
-// twoPly reaches a mid-game position by applying the top move of the first standard
-// case that generated one, then generates again with a fresh rack of the same tiles.
-func twoPly(s *scrabble.Solver, rs *rules.Ruleset, cases []genCase) *genCase {
-	for _, c := range cases {
-		if c.IgnoreCrossWords || len(c.Moves) == 0 {
-			continue
-		}
-		placed := c.Moves[0].Tiles
-		next := genCase{Name: "two-ply", Rack: c.Rack, Mode: int(scrabble.Both)}
-		runCase(s, rs, &next, placed)
-		return &next
-	}
-	return nil
-}
-
-// cellByte encodes a board cell the way internal/encoding.Cell does (bits 0-5 hold
-// letter+1, bit 7 marks a blank). Duplicated here because that package is internal
-// to the solver module and cannot be imported.
-func cellByte(letter int, blank bool) byte {
-	v := byte(letter+1) & 0x3f
-	if blank {
-		v |= 0x80
-	}
-	return v
-}
-
-func toRack(size int, r genRack) rack.Rack {
-	rk := rack.New(size)
-	for _, l := range r.Letters {
-		rk.Add(byte(l))
-	}
-	for i := 0; i < r.Blanks; i++ {
-		rk.AddBlank()
-	}
-	return rk
-}
-
-func rulesetOf(rs *rules.Ruleset) genRuleset {
-	lm := make([][]int, rs.Rows)
-	wm := make([][]int, rs.Rows)
-	for r := 0; r < rs.Rows; r++ {
-		lm[r] = make([]int, rs.Cols)
-		wm[r] = make([]int, rs.Cols)
-		for c := 0; c < rs.Cols; c++ {
-			p := rs.Premium(r, c)
-			lm[r][c] = p.LetterMult()
-			wm[r][c] = p.WordMult()
-		}
-	}
-	return genRuleset{
-		Size: rs.Size(), Cols: rs.Cols, Center: rs.Center, RackSize: rs.RackSize,
-		Bingo: rs.Bingo, Values: rs.Values, LetterMult: lm, WordMult: wm,
-	}
-}
-
-func movesOf(ms []scrabble.Move) []genMove {
-	out := make([]genMove, len(ms))
-	for i, m := range ms {
-		out[i] = genMove{Dir: int(m.Dir), Tiles: tilesOf(m.Tiles), Score: m.Score}
-	}
-	return out
-}
-
-func tilesOf(ps []scrabble.Placement) []genTile {
-	out := make([]genTile, len(ps))
-	for i, p := range ps {
-		out[i] = genTile{Row: p.Row, Col: p.Col, Letter: int(p.Letter), Blank: p.Blank}
-	}
-	return out
-}
-
-// emptyCase builds an empty-board case (Moves filled later by runCase).
-func emptyCase(name string, r genRack, mode scrabble.Mode, ignoreCross bool) genCase {
-	return genCase{Name: name, Rack: r, Mode: int(mode), IgnoreCrossWords: ignoreCross}
-}
-
-// englishRack builds a rack from lowercase a-z letters (index = letter-'a').
-func englishRack(letters string, blanks int) genRack {
-	idx := make([]int, 0, len(letters))
-	for _, ch := range letters {
-		idx = append(idx, int(ch-'a'))
-	}
-	return genRack{Letters: idx, Blanks: blanks}
-}
-
-// russianRack builds a rack from the Russian sample letters used above.
-func russianRack(letters string, blanks int) genRack {
-	m := map[rune]int{'а': 0, 'д': 4, 'о': 15, 'р': 17, 'с': 18, 'я': 32}
-	idx := make([]int, 0, len([]rune(letters)))
-	for _, ch := range letters {
-		i, ok := m[ch]
-		if !ok {
-			log.Fatalf("movegen: russianRack: no index for %q", string(ch))
-		}
-		idx = append(idx, i)
-	}
-	return genRack{Letters: idx, Blanks: blanks}
-}
-
-// emitRulesets writes the per-variant static ruleset data (tile values, bag counts, blanks,
-// bingo, rack size) the offline engine mirrors in ui/src/lib/localgame/ruleset.ts, so a TS
-// parity test can pin that hand-copied table to the Go rulesets (scrabble-solver/rules).
-func emitRulesets() {
-	type rsFix struct {
-		Size     int      `json:"size"`
-		RackSize int      `json:"rackSize"`
-		Bingo    int      `json:"bingo"`
-		Blanks   int      `json:"blanks"`
-		Values   []int    `json:"values"`
-		Counts   []int    `json:"counts"`
-		Letters  []string `json:"letters"`
-	}
-	out := map[string]rsFix{}
-	for _, v := range []struct {
-		name string
-		rs   *rules.Ruleset
-	}{
-		{"scrabble_en", rules.English()},
-		{"scrabble_ru", rules.RussianScrabble()},
-		{"erudit_ru", rules.Erudit()},
-	} {
-		letters := make([]string, v.rs.Size())
-		for i := range letters {
-			ch, err := v.rs.Alphabet.Character(byte(i))
-			if err != nil {
-				log.Fatalf("movegen: %s letter %d: %v", v.name, i, err)
-			}
-			letters[i] = strings.ToUpper(ch)
-		}
-		out[v.name] = rsFix{Size: v.rs.Size(), RackSize: v.rs.RackSize, Bingo: v.rs.Bingo, Blanks: v.rs.Blanks, Values: v.rs.Values, Counts: v.rs.Counts, Letters: letters}
-	}
-	dir := filepath.Join("ui", "src", "lib", "localgame", "testdata")
-	if err := os.MkdirAll(dir, 0o755); err != nil {
-		log.Fatalf("movegen: mkdir %s: %v", dir, err)
-	}
-	writeJSON(filepath.Join(dir, "rulesets.json"), out)
-	log.Printf("movegen: wrote %s (3 variants)", filepath.Join(dir, "rulesets.json"))
-}
-
-func writeJSON(path string, v any) {
-	data, err := json.MarshalIndent(v, "", "  ")
-	if err != nil {
-		log.Fatalf("movegen: marshal %s: %v", path, err)
-	}
-	if err := os.WriteFile(path, append(data, '\n'), 0o644); err != nil {
-		log.Fatalf("movegen: write %s: %v", path, err)
-	}
-}

backend/internal/account/email.go

@@ -105,10 +105,9 @@ func (s *EmailService) allowSend(email string) bool {
 
 // issueCode generates a fresh confirm-code and one-tap deeplink token for (accountID,
 // email), replaces any prior pending confirmation, and mails the branded code in
-// locale; purpose selects the email wording and what verifying does. omitLink drops the
-// one-tap deeplink from the email (account deletion, or a login requested from an installed
-// PWA). Only the SHA-256 hashes of the code and token are stored.
-func (s *EmailService) issueCode(ctx context.Context, accountID uuid.UUID, email, purpose, locale string, omitLink bool) error {
+// locale; purpose selects the email wording and what verifying does. Only the SHA-256
+// hashes of the code and token are stored.
+func (s *EmailService) issueCode(ctx context.Context, accountID uuid.UUID, email, purpose, locale string) error {
 	code, codeHash, err := generateCode()
 	if err != nil {
 		return err
@@ -120,12 +119,11 @@ func (s *EmailService) issueCode(ctx context.Context, accountID uuid.UUID, email
 	if err := s.store.replacePendingConfirmation(ctx, accountID, email, codeHash, tokenHash, purpose, s.now().Add(emailCodeTTL)); err != nil {
 		return err
 	}
-	// Omit the one-tap deeplink when asked: for a login from an installed PWA (the link would
-	// open in a separate browser whose minted session cannot reach the PWA), or for account
-	// deletion (a prefetch or stray click must not delete an account — the delete code is entered
-	// in the app only, and ConfirmByToken refuses a delete token).
+	// Account deletion is never a one-tap link (a prefetch or a stray click must not delete
+	// an account): the delete code is entered in the app only, so the email omits the
+	// deeplink and ConfirmByToken refuses a delete token.
 	deeplink := s.confirmURL(token, locale)
-	if purpose == purposeDelete || omitLink {
+	if purpose == purposeDelete {
 		deeplink = ""
 	}
 	msg, err := renderConfirmationEmail(purpose, code, deeplink, s.baseURL, locale)
@@ -177,7 +175,7 @@ func (s *EmailService) RequestCode(ctx context.Context, accountID uuid.UUID, ema
 		}
 		return ErrEmailTaken
 	}
-	return s.issueCode(ctx, accountID, addr, purposeLink, s.accountLocale(ctx, accountID), false)
+	return s.issueCode(ctx, accountID, addr, purposeLink, s.accountLocale(ctx, accountID))
 }
 
 // ConfirmCode verifies code for accountID and email. On success it attaches a
@@ -223,11 +221,8 @@ func (s *EmailService) ConfirmCode(ctx context.Context, accountID uuid.UUID, ema
 // the ordinary returning-user login. The code is mailed to the address, so only its
 // real owner can complete the login. On first contact browserTZ (the client's
 // detected "±HH:MM" UTC offset) seeds the new account's time zone and language its UI
-// language. When pwa is set (the request came from an installed PWA) the login email omits the
-// one-tap confirm link — it would open in a separate browser, out of the PWA's reach — so the
-// code is entered in the same window. It returns the target account id for the subsequent
-// LoginWithCode.
-func (s *EmailService) RequestLoginCode(ctx context.Context, email, browserTZ, language string, pwa bool) (uuid.UUID, error) {
+// language. It returns the target account id for the subsequent LoginWithCode.
+func (s *EmailService) RequestLoginCode(ctx context.Context, email, browserTZ, language string) (uuid.UUID, error) {
 	addr, err := normalizeEmail(email)
 	if err != nil {
 		return uuid.UUID{}, err
@@ -239,7 +234,7 @@ func (s *EmailService) RequestLoginCode(ctx context.Context, email, browserTZ, l
 	if err != nil {
 		return uuid.UUID{}, err
 	}
-	if err := s.issueCode(ctx, acc.ID, addr, purposeLogin, language, pwa); err != nil {
+	if err := s.issueCode(ctx, acc.ID, addr, purposeLogin, language); err != nil {
 		return uuid.UUID{}, err
 	}
 	return acc.ID, nil

backend/internal/account/link.go

@@ -92,7 +92,7 @@ func (s *EmailService) RequestLinkCode(ctx context.Context, accountID uuid.UUID,
 	if !s.allowSend(addr) {
 		return ErrTooManyRequests
 	}
-	return s.issueCode(ctx, accountID, addr, purposeLink, s.accountLocale(ctx, accountID), false)
+	return s.issueCode(ctx, accountID, addr, purposeLink, s.accountLocale(ctx, accountID))
 }
 
 // ConfirmLink verifies code for (accountID, email) and reports the address's
@@ -140,7 +140,7 @@ func (s *EmailService) RequestChangeCode(ctx context.Context, accountID uuid.UUI
 	if !s.allowSend(addr) {
 		return ErrTooManyRequests
 	}
-	return s.issueCode(ctx, accountID, addr, purposeChange, s.accountLocale(ctx, accountID), false)
+	return s.issueCode(ctx, accountID, addr, purposeChange, s.accountLocale(ctx, accountID))
 }
 
 // ConfirmChange verifies code for (accountID, newEmail) and atomically replaces the
@@ -199,7 +199,7 @@ func (s *EmailService) RequestDeleteCode(ctx context.Context, accountID uuid.UUI
 	if !s.allowSend(addr) {
 		return ErrTooManyRequests
 	}
-	return s.issueCode(ctx, accountID, addr, purposeDelete, s.accountLocale(ctx, accountID), false)
+	return s.issueCode(ctx, accountID, addr, purposeDelete, s.accountLocale(ctx, accountID))
 }
 
 // VerifyDeleteCode verifies the account-deletion code against the account's own email and

backend/internal/adminalert/notify.go

@@ -33,21 +33,21 @@ type Notifier struct {
 	complaints ComplaintCounter
 	from       string
 	to         string
+	consoleURL string
 	clock      func() time.Time
 	log        *zap.Logger
 	last       time.Time
 }
 
-// New constructs a Notifier. from and to are the alert sender and recipient(s); log may be
-// nil. The watermark starts at "now", so only items arriving after start-up are reported. The
-// digest deliberately carries no admin-console link — an admin URL must never travel in an
-// email, where a mail provider could cache or index it.
-func New(mailer account.Mailer, fb FeedbackCounter, cp ComplaintCounter, from, to string, log *zap.Logger) *Notifier {
+// New constructs a Notifier. from and to are the alert sender and recipient(s); consoleURL,
+// when non-empty, is the admin-console link included in the email. log may be nil. The
+// watermark starts at "now", so only items arriving after start-up are reported.
+func New(mailer account.Mailer, fb FeedbackCounter, cp ComplaintCounter, from, to, consoleURL string, log *zap.Logger) *Notifier {
 	if log == nil {
 		log = zap.NewNop()
 	}
 	return &Notifier{
-		mailer: mailer, feedback: fb, complaints: cp, from: from, to: to,
+		mailer: mailer, feedback: fb, complaints: cp, from: from, to: to, consoleURL: consoleURL,
 		clock: func() time.Time { return time.Now().UTC() }, log: log, last: time.Now().UTC(),
 	}
 }
@@ -103,9 +103,10 @@ func (n *Notifier) digest(fb, cp int) account.Message {
 		parts = append(parts, fmt.Sprintf("%d new word complaint(s)", cp))
 	}
 	summary := strings.Join(parts, ", ")
-	// No admin-console link in the body: an admin URL must never travel in an email (a mail
-	// provider could cache or index it). The operator opens the console directly.
 	text := summary + "."
+	if n.consoleURL != "" {
+		text += "\n\nOpen the admin console: " + n.consoleURL
+	}
 	return account.Message{
 		From:    n.from,
 		To:      n.to,

backend/internal/adminalert/notify_test.go

@@ -28,7 +28,7 @@ func (m *recordingMailer) Send(_ context.Context, msg account.Message) error {
 
 func TestNotifierSkipsWhenNothingNew(t *testing.T) {
 	mailer := &recordingMailer{}
-	n := New(mailer, fbCounter{0}, cpCounter{0}, "alerts@erudit-game.ru", "op@x.ru", nil)
+	n := New(mailer, fbCounter{0}, cpCounter{0}, "alerts@erudit-game.ru", "op@x.ru", "", nil)
 	n.tick(context.Background())
 	if len(mailer.sent) != 0 {
 		t.Fatalf("sent %d emails, want 0 when nothing is new", len(mailer.sent))
@@ -37,7 +37,7 @@ func TestNotifierSkipsWhenNothingNew(t *testing.T) {
 
 func TestNotifierDigestsNewItems(t *testing.T) {
 	mailer := &recordingMailer{}
-	n := New(mailer, fbCounter{2}, cpCounter{1}, "alerts@erudit-game.ru", "op@x.ru, two@x.ru", nil)
+	n := New(mailer, fbCounter{2}, cpCounter{1}, "alerts@erudit-game.ru", "op@x.ru, two@x.ru", "https://erudit-game.ru/_gm", nil)
 	n.tick(context.Background())
 	if len(mailer.sent) != 1 {
 		t.Fatalf("sent %d emails, want 1 digest", len(mailer.sent))
@@ -49,9 +49,7 @@ func TestNotifierDigestsNewItems(t *testing.T) {
 	if !strings.Contains(msg.Subject, "2 new feedback") || !strings.Contains(msg.Subject, "1 new word complaint") {
 		t.Errorf("digest subject = %q, want the feedback + complaint counts", msg.Subject)
 	}
-	// The digest must never carry an admin-console link — an admin URL in an email is a leak
-	// (mail providers cache/index it).
-	if strings.Contains(msg.Text, "/_gm") || strings.Contains(strings.ToLower(msg.Text), "admin console") {
-		t.Errorf("digest body = %q, must not carry an admin-console link", msg.Text)
+	if !strings.Contains(msg.Text, "/_gm") {
+		t.Errorf("digest body = %q, want the console link", msg.Text)
 	}
 }

backend/internal/engine/endfixture_test.go

@@ -1,123 +0,0 @@
-package engine
-
-import (
-	"encoding/json"
-	"os"
-	"path/filepath"
-	"testing"
-
-	"gitea.iliadenisov.ru/developer/scrabble-solver/rules"
-)
-
-// The offline engine (ui/src/lib/localgame) reproduces the end-of-game rack settlement and the
-// winner rule so a local game finishes with the same scores as the server. These golden fixtures
-// pin the ported pure functions (applyEndAdjustment / winner / rackValue) to the real Go engine.
-// Being in-package, this emitter constructs Game values directly and drives the unexported
-// end-game math on chosen positions.
-
-type endCaseIn struct {
-	Name     string  `json:"name"`
-	Variant  string  `json:"variant"`
-	Reason   string  `json:"reason"`
-	Hands    [][]int `json:"hands"`
-	Scores   []int   `json:"scores"`
-	Resigned []bool  `json:"resigned"`
-	ToMove   int     `json:"toMove"`
-}
-
-type endCaseOut struct {
-	endCaseIn
-	ScoresAfter []int `json:"scoresAfter"`
-	Winner      int   `json:"winner"`
-}
-
-func rulesetFor(variant string) *rules.Ruleset {
-	switch variant {
-	case "scrabble_ru":
-		return rules.RussianScrabble()
-	case "erudit_ru":
-		return rules.Erudit()
-	default:
-		return rules.English()
-	}
-}
-
-func reasonFor(s string) EndReason {
-	switch s {
-	case "out_of_tiles":
-		return EndOutOfTiles
-	case "scoreless":
-		return EndScoreless
-	case "resign":
-		return EndResign
-	case "aborted":
-		return EndAborted
-	}
-	return EndNotOver
-}
-
-func handsBytes(hands [][]int) [][]byte {
-	out := make([][]byte, len(hands))
-	for i, h := range hands {
-		b := make([]byte, len(h))
-		for j, x := range h {
-			b[j] = byte(x)
-		}
-		out[i] = b
-	}
-	return out
-}
-
-// TestEmitEndgameFixtures regenerates ui/src/lib/localgame/testdata/endgame.json. Gated by
-// EMIT_ENGINE_FIXTURES. Regenerate with:
-//
-//	EMIT_ENGINE_FIXTURES=1 go test ./backend/internal/engine -run TestEmitEndgameFixtures
-func TestEmitEndgameFixtures(t *testing.T) {
-	if os.Getenv("EMIT_ENGINE_FIXTURES") == "" {
-		t.Skip("set EMIT_ENGINE_FIXTURES=1 to regenerate ui/src/lib/localgame/testdata/endgame.json")
-	}
-
-	cases := []endCaseIn{
-		{"out-basic", "scrabble_en", "out_of_tiles", [][]int{{}, {0, 1, 2}}, []int{50, 40}, []bool{false, false}, 0},
-		{"out-blank", "scrabble_en", "out_of_tiles", [][]int{{}, {255, 0}}, []int{30, 30}, []bool{false, false}, 0},
-		{"out-erudit-yo", "erudit_ru", "out_of_tiles", [][]int{{}, {6, 32}}, []int{10, 10}, []bool{false, false}, 0},
-		{"out-tie", "scrabble_en", "out_of_tiles", [][]int{{}, {}}, []int{30, 30}, []bool{false, false}, 0},
-		{"out-3p", "scrabble_ru", "out_of_tiles", [][]int{{}, {0, 1}, {2}}, []int{10, 10, 10}, []bool{false, false, false}, 0},
-		{"scoreless", "scrabble_en", "scoreless", [][]int{{0, 1}, {2, 3}}, []int{20, 20}, []bool{false, false}, 0},
-		{"resign-2p", "scrabble_en", "resign", [][]int{{}, {0}}, []int{100, 10}, []bool{true, false}, 1},
-		{"resign-3p", "scrabble_en", "resign", [][]int{{}, {}, {}}, []int{50, 60, 40}, []bool{false, true, false}, 0},
-		{"aborted", "scrabble_en", "aborted", [][]int{{0}, {1}}, []int{40, 30}, []bool{false, false}, 0},
-	}
-
-	out := make([]endCaseOut, 0, len(cases))
-	for _, c := range cases {
-		rs := rulesetFor(c.Variant)
-		scores := append([]int(nil), c.Scores...)
-		g := &Game{
-			rules:    rs,
-			hands:    handsBytes(c.Hands),
-			scores:   scores,
-			resigned: c.Resigned,
-			toMove:   c.ToMove,
-		}
-		reason := reasonFor(c.Reason)
-		g.over = true
-		g.reason = reason
-		g.applyEndAdjustment(reason)
-		out = append(out, endCaseOut{endCaseIn: c, ScoresAfter: g.scores, Winner: g.winner()})
-	}
-
-	dir := filepath.Join("..", "..", "..", "ui", "src", "lib", "localgame", "testdata")
-	if err := os.MkdirAll(dir, 0o755); err != nil {
-		t.Fatalf("mkdir %s: %v", dir, err)
-	}
-	data, err := json.MarshalIndent(map[string]any{"cases": out}, "", "  ")
-	if err != nil {
-		t.Fatalf("marshal: %v", err)
-	}
-	path := filepath.Join(dir, "endgame.json")
-	if err := os.WriteFile(path, append(data, '\n'), 0o644); err != nil {
-		t.Fatalf("write %s: %v", path, err)
-	}
-	t.Logf("wrote %s (%d cases)", path, len(out))
-}

backend/internal/game/helpers_test.go

@@ -69,29 +69,6 @@ func TestHintsRemaining(t *testing.T) {
 	}
 }
 
-func TestHintUnlockLeftSeconds(t *testing.T) {
-	now := time.Now()
-	// A gated vs_ai game on the caller's turn, the robot having moved 10 min ago (turn started then).
-	gated := Game{VsAI: true, ToMove: 0, MoveCount: 2, TurnStartedAt: now.Add(-10 * time.Minute)}
-	cases := []struct {
-		name string
-		g    Game
-		seat int
-		want int
-	}{
-		{"non-vs_ai is open", Game{VsAI: false, ToMove: 0, MoveCount: 2, TurnStartedAt: now.Add(-10 * time.Minute)}, 0, 0},
-		{"not the caller's turn is open", gated, 1, 0},
-		{"human first move (no robot move) is open", Game{VsAI: true, ToMove: 0, MoveCount: 0, TurnStartedAt: now}, 0, 0},
-		{"robot moved 10 min ago leaves 20 min", gated, 0, 20 * 60},
-		{"robot moved past the window is open", Game{VsAI: true, ToMove: 0, MoveCount: 2, TurnStartedAt: now.Add(-40 * time.Minute)}, 0, 0},
-	}
-	for _, c := range cases {
-		if got := hintUnlockLeftSeconds(c.g, c.seat, now); got != c.want {
-			t.Errorf("%s: hintUnlockLeftSeconds = %d, want %d", c.name, got, c.want)
-		}
-	}
-}
-
 func TestAllowedTimeout(t *testing.T) {
 	if !allowedTimeout(24 * time.Hour) {
 		t.Error("24h must be allowed")

backend/internal/game/service.go

@@ -1058,31 +1058,10 @@ func (svc *Service) MarkChangesApplied(ctx context.Context, variant engine.Varia
 	return svc.store.MarkChangesApplied(ctx, variant.String(), version)
 }
 
-// hintIdleWindow is how long a vs_ai player must be stuck on a turn (since the robot's last move)
-// before the idle hint unlocks. Mirrors the offline client (lib/hints HINT_GATE_MS = 30 min).
-const hintIdleWindow = 30 * time.Minute
-
-// hintUnlockLeftSeconds is the seconds until g's vs_ai idle hint unlocks for seat, measured from now:
-// the robot's last move (the current turn's start, on the human's turn) plus the window, floored at
-// 0 and ceiled to whole seconds. It is 0 for a non-vs_ai game, when it is not seat's turn, or on the
-// human's first move (MoveCount 0, no robot move yet) — the gate is an anti-frustration aid, not a
-// first-move tax. The client anchors a monotonic countdown to it, so a client clock cannot skew it.
-func hintUnlockLeftSeconds(g Game, seat int, now time.Time) int {
-	if !g.VsAI || g.ToMove != seat || g.MoveCount < 1 {
-		return 0
-	}
-	left := g.TurnStartedAt.Add(hintIdleWindow).Sub(now)
-	if left <= 0 {
-		return 0
-	}
-	return int((left + time.Second - 1) / time.Second) // ceil to whole seconds (no math import)
-}
-
-// Hint reveals the top-scoring legal play for the requesting player on their turn. For a human game
-// it spends one hint from the per-game allowance then the profile wallet (ErrHintsDisabled /
-// ErrNoHintsLeft / ErrNoHintAvailable). For a vs_ai game the hint is unlimited and wallet-free but
-// idle-gated from the server clock (ErrHintLocked until the window elapses) and counts toward no
-// hint statistic.
+// Hint reveals the top-scoring legal play for the requesting player on their
+// turn, spending one hint from their per-game allowance and then their profile
+// wallet. It returns ErrHintsDisabled, ErrNoHintsLeft or ErrNoHintAvailable as
+// appropriate.
 func (svc *Service) Hint(ctx context.Context, gameID, accountID uuid.UUID) (HintResult, error) {
 	pre, err := svc.store.GetGame(ctx, gameID)
 	if err != nil {
@@ -1101,26 +1080,6 @@ func (svc *Service) Hint(ctx context.Context, gameID, accountID uuid.UUID) (Hint
 	if !pre.HintsAllowed {
 		return HintResult{}, ErrHintsDisabled
 	}
-	if pre.VsAI {
-		// vs_ai: unlimited and wallet-free, but idle-gated from the server clock — and counted toward
-		// no hint statistic. Enforce the gate (the client normally pre-gates from the view's
-		// HintUnlockLeftSeconds; this is the authoritative backstop), then serve the top move without
-		// touching the allowance, the wallet or hints_used.
-		if hintUnlockLeftSeconds(pre, seat, svc.clock()) > 0 {
-			return HintResult{}, ErrHintLocked
-		}
-		unlock := svc.locks.lock(gameID)
-		defer unlock()
-		g, err := svc.liveGame(ctx, pre)
-		if err != nil {
-			return HintResult{}, err
-		}
-		move, ok := g.HintView()
-		if !ok {
-			return HintResult{}, ErrNoHintAvailable
-		}
-		return HintResult{Move: move}, nil
-	}
 	acc, err := svc.accounts.GetByID(ctx, accountID)
 	if err != nil {
 		return HintResult{}, err
@@ -1249,8 +1208,6 @@ func (svc *Service) GameState(ctx context.Context, gameID, accountID uuid.UUID)
 		BagLen:         g.BagLen(),
 		HintsRemaining: hintsRemaining(pre.HintsPerPlayer, pre.Seats[seat].HintsUsed, acc.HintBalance),
 		WalletBalance:  acc.HintBalance,
-		// vs_ai idle-hint gate (seconds left; 0 for a human game / first move / not your turn).
-		HintUnlockLeftSeconds: hintUnlockLeftSeconds(pre, seat, svc.clock()),
 	}, nil
 }
 

backend/internal/game/types.go

@@ -65,10 +65,6 @@ 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")
-	// ErrHintLocked is returned when a vs_ai game's idle hint is still gated (the player has not yet
-	// been stuck the idle window since the robot's last move). The client normally pre-gates from
-	// StateView.HintUnlockLeftSeconds, so this is the authoritative server-clock backstop.
-	ErrHintLocked = errors.New("game: hint is not available yet")
 	// 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")
@@ -244,11 +240,6 @@ type StateView struct {
 	// 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
-	// HintUnlockLeftSeconds is, for a vs_ai game on the requesting player's turn, the seconds left
-	// until the idle hint unlocks (the robot's last move plus the idle window, from the server clock);
-	// 0 for the human's first move, when it is not their turn, or a non-vs_ai game. The vs_ai hint is
-	// unlimited and wallet-free; this idle gate replaces the allowance/wallet for it.
-	HintUnlockLeftSeconds int
 }
 
 // HistoryMove is one decoded journal row, independent of any dictionary.

backend/internal/inttest/email_test.go

@@ -206,7 +206,7 @@ func TestEmailLoginFlow(t *testing.T) {
 	svc := account.NewEmailService(account.NewStore(testDB), mailer, "https://erudit-game.ru")
 	email := "login-" + uuid.NewString() + "@example.com"
 
-	accountID, err := svc.RequestLoginCode(ctx, email, "+02:00", "en", false)
+	accountID, err := svc.RequestLoginCode(ctx, email, "+02:00", "en")
 	if err != nil {
 		t.Fatalf("request login code: %v", err)
 	}
@@ -233,7 +233,7 @@ func TestEmailLoginFlow(t *testing.T) {
 	}
 
 	// A second login for the same email is the returning user: same account.
-	if _, err := svc.RequestLoginCode(ctx, email, "", "ru", false); err != nil {
+	if _, err := svc.RequestLoginCode(ctx, email, "", "ru"); err != nil {
 		t.Fatalf("second request: %v", err)
 	}
 	acc2, err := svc.LoginWithCode(ctx, email, sixDigit.FindString(mailer.lastBody))
@@ -255,7 +255,7 @@ func TestEmailLoginProvisionsGuestUntilConfirmed(t *testing.T) {
 	svc := account.NewEmailService(store, mailer, "https://erudit-game.ru")
 	email := "squat-" + uuid.NewString() + "@example.com"
 
-	id, err := svc.RequestLoginCode(ctx, email, "", "en", false)
+	id, err := svc.RequestLoginCode(ctx, email, "", "en")
 	if err != nil {
 		t.Fatalf("request login code: %v", err)
 	}
@@ -279,34 +279,6 @@ func TestEmailLoginProvisionsGuestUntilConfirmed(t *testing.T) {
 	}
 }
 
-// TestEmailLoginPWAOmitsLink: a login requested from an installed PWA (pwa=true) mails only the
-// code — no one-tap confirm link, which would otherwise open in a separate browser out of the
-// PWA's reach. A non-PWA request keeps the link.
-func TestEmailLoginPWAOmitsLink(t *testing.T) {
-	ctx := context.Background()
-	mailer := &capturingMailer{}
-	svc := account.NewEmailService(account.NewStore(testDB), mailer, "https://erudit-game.ru")
-
-	pwaEmail := "pwa-login-" + uuid.NewString() + "@example.com"
-	if _, err := svc.RequestLoginCode(ctx, pwaEmail, "", "en", true); err != nil {
-		t.Fatalf("pwa request login: %v", err)
-	}
-	if sixDigit.FindString(mailer.lastBody) == "" {
-		t.Errorf("pwa login mail must still carry the code, body %q", mailer.lastBody)
-	}
-	if confirmToken.MatchString(mailer.lastBody) {
-		t.Errorf("pwa login mail must omit the one-tap confirm link, body %q", mailer.lastBody)
-	}
-
-	webEmail := "web-login-" + uuid.NewString() + "@example.com"
-	if _, err := svc.RequestLoginCode(ctx, webEmail, "", "en", false); err != nil {
-		t.Fatalf("web request login: %v", err)
-	}
-	if !confirmToken.MatchString(mailer.lastBody) {
-		t.Errorf("non-pwa login mail must keep the one-tap confirm link, body %q", mailer.lastBody)
-	}
-}
-
 // confirmToken extracts the one-tap deeplink token from the /app/#/confirm/<token> link
 // the branded email carries.
 var confirmToken = regexp.MustCompile(`/confirm/([A-Za-z0-9_-]+)`)
@@ -329,7 +301,7 @@ func TestConfirmByTokenLogin(t *testing.T) {
 	svc := account.NewEmailService(store, mailer, "https://erudit-game.ru")
 	email := "tok-login-" + uuid.NewString() + "@example.com"
 
-	id, err := svc.RequestLoginCode(ctx, email, "", "en", false)
+	id, err := svc.RequestLoginCode(ctx, email, "", "en")
 	if err != nil {
 		t.Fatalf("request login: %v", err)
 	}
@@ -410,7 +382,7 @@ func TestEmailAccountSeedsDisplayName(t *testing.T) {
 	svc := account.NewEmailService(store, &capturingMailer{}, "https://erudit-game.ru")
 	local := "kaya-" + uuid.NewString()[:8]
 
-	id, err := svc.RequestLoginCode(ctx, local+"@example.com", "", "en", false)
+	id, err := svc.RequestLoginCode(ctx, local+"@example.com", "", "en")
 	if err != nil {
 		t.Fatalf("request login: %v", err)
 	}

backend/internal/robot/strategyfixture_test.go

@@ -1,146 +0,0 @@
-package robot
-
-import (
-	"encoding/json"
-	"os"
-	"path/filepath"
-	"strconv"
-	"testing"
-
-	"scrabble/backend/internal/engine"
-)
-
-// The client-side offline robot (ui/src/lib/robot) reproduces the robot's move choice
-// so a local vs_ai game plays the same way as the server. These golden fixtures pin that
-// TS port to the real Go strategy. Being in-package, this emitter can exercise the
-// unexported mix / playToWin / deviates / selectMove that the port mirrors.
-
-type mixCase struct {
-	Seed  string `json:"seed"`
-	Salt  string `json:"salt"`
-	Nums  []int  `json:"nums"`
-	Value string `json:"value"` // the mix() uint64, as a decimal string (exceeds JS safe ints)
-}
-
-type decisionCase struct {
-	Seed       string `json:"seed"`
-	MoveCount  int    `json:"moveCount"`
-	MyScore    int    `json:"myScore"`
-	OppScore   int    `json:"oppScore"`
-	CandScores []int  `json:"candScores"`
-	RackLen    int    `json:"rackLen"`
-	BagLen     int    `json:"bagLen"`
-	PlayToWin  bool   `json:"playToWin"`
-	Win        bool   `json:"win"` // the per-turn intent after the deviate flip
-	Kind       string `json:"kind"`
-	Index      int    `json:"index"` // chosen candidate index for a play, else -1
-}
-
-type strategyFixture struct {
-	PlayToWinPercent int            `json:"playToWinPercent"`
-	Mix              []mixCase      `json:"mix"`
-	Decisions        []decisionCase `json:"decisions"`
-}
-
-// scenario is one selectMove situation exercised across several seeds.
-type scenario struct {
-	moveCount, myScore, oppScore, rackLen, bagLen int
-	cands                                         []int
-}
-
-// TestEmitStrategyFixtures regenerates ui/src/lib/robot/testdata/strategy.json. It is
-// gated by EMIT_STRATEGY_FIXTURES so a normal `go test` skips it; the committed output is
-// what the TS parity test consumes. Regenerate with:
-//
-//	EMIT_STRATEGY_FIXTURES=1 go test ./backend/internal/robot -run TestEmitStrategyFixtures
-func TestEmitStrategyFixtures(t *testing.T) {
-	if os.Getenv("EMIT_STRATEGY_FIXTURES") == "" {
-		t.Skip("set EMIT_STRATEGY_FIXTURES=1 to regenerate ui/src/lib/robot/testdata/strategy.json")
-	}
-
-	seeds := []int64{1, 42, -7, 1000003, 9999999999, 123456789, -123456789}
-
-	mixCases := []mixCase{}
-	addMix := func(seed int64, salt string, nums ...int) {
-		mixCases = append(mixCases, mixCase{
-			Seed:  strconv.FormatInt(seed, 10),
-			Salt:  salt,
-			Nums:  append([]int{}, nums...),
-			Value: strconv.FormatUint(mix(seed, salt, nums...), 10),
-		})
-	}
-	for _, sd := range seeds {
-		addMix(sd, "win")
-		addMix(sd, "deviate", 0)
-		addMix(sd, "deviate", 7)
-	}
-
-	scenarios := []scenario{
-		{3, 40, 55, 7, 20, []int{30, 12, 8}},   // behind, mid-game
-		{10, 120, 90, 7, 8, []int{25, 18, 5}},  // ahead, late
-		{1, 0, 0, 7, 30, []int{60, 30, 15, 7}}, // first move, big spread
-		{20, 200, 40, 5, 2, []int{50, 20}},     // big lead, bag near empty (no deviate)
-		{5, 30, 30, 7, 14, []int{20, 20, 20}},  // equal margins (tie-break)
-		{8, 50, 60, 7, 20, []int{}},            // no play, bag can refill -> exchange
-		{8, 50, 60, 3, 2, []int{}},             // no play, bag can't refill -> pass
-		{15, 300, 10, 7, 6, []int{80, 40, 10}}, // overshoots the band -> nearest to +30
-	}
-
-	decisions := []decisionCase{}
-	for _, sd := range seeds {
-		for _, sc := range scenarios {
-			cands := make([]engine.MoveRecord, len(sc.cands))
-			for i, s := range sc.cands {
-				cands[i] = engine.MoveRecord{Score: s, Player: i}
-			}
-			rack := make([]string, sc.rackLen)
-			for i := range rack {
-				rack[i] = "a"
-			}
-
-			ptw := playToWin(sd)
-			win := ptw
-			if deviates(sd, sc.moveCount, sc.bagLen) {
-				win = !win
-			}
-			d := selectMove(cands, sc.myScore, sc.oppScore, win, defaultBand, rack, sc.bagLen)
-
-			kind, index := "pass", -1
-			switch d.kind {
-			case decidePlay:
-				kind, index = "play", d.move.Player
-			case decideExchange:
-				kind = "exchange"
-			}
-
-			decisions = append(decisions, decisionCase{
-				Seed:       strconv.FormatInt(sd, 10),
-				MoveCount:  sc.moveCount,
-				MyScore:    sc.myScore,
-				OppScore:   sc.oppScore,
-				CandScores: append([]int{}, sc.cands...),
-				RackLen:    sc.rackLen,
-				BagLen:     sc.bagLen,
-				PlayToWin:  ptw,
-				Win:        win,
-				Kind:       kind,
-				Index:      index,
-			})
-		}
-	}
-
-	fx := strategyFixture{PlayToWinPercent: playToWinPercent, Mix: mixCases, Decisions: decisions}
-	dir := filepath.Join("..", "..", "..", "ui", "src", "lib", "robot", "testdata")
-	if err := os.MkdirAll(dir, 0o755); err != nil {
-		t.Fatalf("mkdir %s: %v", dir, err)
-	}
-	data, err := json.MarshalIndent(fx, "", "  ")
-	if err != nil {
-		t.Fatalf("marshal: %v", err)
-	}
-	path := filepath.Join(dir, "strategy.json")
-	if err := os.WriteFile(path, append(data, '\n'), 0o644); err != nil {
-		t.Fatalf("write %s: %v", path, err)
-	}
-	t.Logf("wrote %s (%d mix, %d decisions)", path, len(mixCases), len(decisions))
-}

backend/internal/server/banner.go

@@ -8,7 +8,6 @@ import (
 
 	"scrabble/backend/internal/account"
 	"scrabble/backend/internal/ads"
-	"scrabble/backend/internal/engine"
 	"scrabble/backend/internal/notify"
 )
 
@@ -57,34 +56,9 @@ func (s *Server) profileResponse(ctx context.Context, acc account.Account) profi
 	r := profileResponseFor(acc)
 	r.Banner = s.bannerFor(ctx, acc)
 	s.fillLinkedIdentities(ctx, &r, acc.ID)
-	r.DictVersions = s.currentDictVersions()
 	return r
 }
 
-// currentDictVersions reports the current dictionary version of every game variant with a
-// resident dictionary, as engine.Variant stable labels. It backs profileResponse.DictVersions
-// so an offline-capable client preloads the matching dawg per variant off the cold-start
-// profile. A variant without a loaded dictionary is omitted (Registry.Latest reports
-// ErrUnknownVariant); the returned slice is nil only when no variant is resident.
-func (s *Server) currentDictVersions() []dictVersion {
-	if s.registry == nil {
-		return nil // no dictionary registry wired (e.g. a minimal test server): advertise none
-	}
-	variants := []engine.Variant{engine.VariantEnglish, engine.VariantRussianScrabble, engine.VariantErudit}
-	out := make([]dictVersion, 0, len(variants))
-	for _, v := range variants {
-		version, _, err := s.registry.Latest(v)
-		if err != nil {
-			continue
-		}
-		out = append(out, dictVersion{Variant: v.String(), Version: version})
-	}
-	if len(out) == 0 {
-		return nil
-	}
-	return out
-}
-
 // fillLinkedIdentities sets the profile's confirmed email address and platform-linked
 // flags from the account's identities, so the client offers the right link / unlink /
 // change-email controls. A read failure leaves them zero (no controls), logged as a

backend/internal/server/dto.go

@@ -63,20 +63,6 @@ type profileResponse struct {
 	Email          string `json:"email"`
 	TelegramLinked bool   `json:"telegram_linked"`
 	VkLinked       bool   `json:"vk_linked"`
-	// DictVersions lists the current dictionary version per game variant (engine.Variant
-	// stable labels). An installed PWA preparing for offline play reads it to preload the
-	// right dawg per enabled variant off this cold-start response, without an extra request.
-	// Filled outside the pure projection (it reads the dictionary registry), so it is empty
-	// for callers that build the DTO without a Server. See Server.profileResponse.
-	DictVersions []dictVersion `json:"dict_versions,omitempty"`
-}
-
-// dictVersion pairs a game variant's stable label (engine.Variant.String) with its current
-// dictionary version. profileResponse.DictVersions carries the set so an offline-capable
-// client preloads the matching dawg per variant.
-type dictVersion struct {
-	Variant string `json:"variant"`
-	Version string `json:"version"`
 }
 
 // tileDTO is one placed (or to-place) tile.
@@ -163,16 +149,13 @@ type alphabetEntryDTO struct {
 // stateDTO is a player's view of a game. Rack carries wire alphabet indices (a
 // blank is engine.BlankIndex). Alphabet is present only when the request asked for it.
 type stateDTO struct {
-	Game           gameDTO `json:"game"`
-	Seat           int     `json:"seat"`
-	Rack           []int   `json:"rack"`
-	BagLen         int     `json:"bag_len"`
-	HintsRemaining int     `json:"hints_remaining"`
-	WalletBalance  int     `json:"wallet_balance"`
-	// HintUnlockLeftSeconds is the vs_ai idle-hint gate: seconds until the hint unlocks (0 for a human
-	// game / first move / not your turn). The client anchors a monotonic countdown to it.
-	HintUnlockLeftSeconds int                `json:"hint_unlock_left_seconds"`
-	Alphabet              []alphabetEntryDTO `json:"alphabet,omitempty"`
+	Game           gameDTO            `json:"game"`
+	Seat           int                `json:"seat"`
+	Rack           []int              `json:"rack"`
+	BagLen         int                `json:"bag_len"`
+	HintsRemaining int                `json:"hints_remaining"`
+	WalletBalance  int                `json:"wallet_balance"`
+	Alphabet       []alphabetEntryDTO `json:"alphabet,omitempty"`
 }
 
 // matchDTO reports whether the caller has been paired into a game.
@@ -318,13 +301,12 @@ func stateDTOFrom(v game.StateView, includeAlphabet bool) (stateDTO, error) {
 		return stateDTO{}, err
 	}
 	dto := stateDTO{
-		Game:                  gameDTOFromGame(v.Game),
-		Seat:                  v.Seat,
-		Rack:                  rack,
-		BagLen:                v.BagLen,
-		HintsRemaining:        v.HintsRemaining,
-		WalletBalance:         v.WalletBalance,
-		HintUnlockLeftSeconds: v.HintUnlockLeftSeconds,
+		Game:           gameDTOFromGame(v.Game),
+		Seat:           v.Seat,
+		Rack:           rack,
+		BagLen:         v.BagLen,
+		HintsRemaining: v.HintsRemaining,
+		WalletBalance:  v.WalletBalance,
 	}
 	if includeAlphabet {
 		tab, err := engine.AlphabetTable(v.Game.Variant)

backend/internal/server/handlers.go

@@ -239,9 +239,6 @@ func statusForError(err error) (int, string) {
 		return http.StatusConflict, "no_hint_available"
 	case errors.Is(err, game.ErrHintsDisabled), errors.Is(err, game.ErrNoHintsLeft):
 		return http.StatusConflict, "hint_unavailable"
-	case errors.Is(err, game.ErrHintLocked):
-		// A vs_ai idle hint is still gated (the server-clock backstop); the client shows the lock.
-		return http.StatusConflict, "hint_locked"
 	case errors.Is(err, engine.ErrIllegalPlay), errors.Is(err, engine.ErrTilesNotOnRack), errors.Is(err, engine.ErrGameOver):
 		return http.StatusUnprocessableEntity, "illegal_play"
 	case errors.Is(err, account.ErrEmailTaken), errors.Is(err, account.ErrIdentityTaken):

backend/internal/server/handlers_auth.go

@@ -174,10 +174,6 @@ type emailRequest struct {
 	Email     string `json:"email"`
 	BrowserTZ string `json:"browser_tz"`
 	Language  string `json:"language"`
-	// Pwa marks a request from an installed PWA (standalone display mode): the login email then
-	// omits the one-tap confirm link so the code is typed in the same window (the link would open
-	// in a separate browser whose session cannot reach the PWA). See EmailService.RequestLoginCode.
-	Pwa bool `json:"pwa"`
 }
 
 // handleEmailRequest issues a login confirm-code to the email. It always reports
@@ -189,7 +185,7 @@ func (s *Server) handleEmailRequest(c *gin.Context) {
 		abortBadRequest(c, "email is required")
 		return
 	}
-	if _, err := s.emails.RequestLoginCode(c.Request.Context(), req.Email, req.BrowserTZ, req.Language, req.Pwa); err != nil {
+	if _, err := s.emails.RequestLoginCode(c.Request.Context(), req.Email, req.BrowserTZ, req.Language); err != nil {
 		s.abortErr(c, err)
 		return
 	}

docs/ARCHITECTURE.md

@@ -244,9 +244,7 @@ arrive from a platform rather than completing a mandatory registration).
   256-bit token stored only as its SHA-256, 12-hour TTL): a login mints a session in the
   browser that opens it (magic-link), a link confirms the identity and emits a `notify`
   profile-refresh to the in-app session, a change switches the account's email in place,
-  and a would-be merge is deferred to the interactive flow. A login requested from an installed **PWA** omits the deeplink
-  entirely — its email carries the code only, typed in the same window, since the link would open
-  in a separate browser whose minted session cannot reach the PWA. The confirm runs on load; the token rides the URL fragment (never
+  and a would-be merge is deferred to the interactive flow. The confirm runs on load; the token rides the URL fragment (never
   sent to the server), so a plain link prefetch cannot reach it, and the manual
   six-digit code is the fallback if an aggressive scanner runs the page. An
   **email-login** account is created flagged `is_guest` and stays reapable until the
@@ -1043,9 +1041,7 @@ link — misses the event; while an add-email confirmation is pending the client
   (`internal/adminalert`, started from `main`) emails the operator (`ADMIN_EMAIL`, from a
   distinct `SMTP_RELAY_ADMIN_FROM`) when new player feedback or word complaints arrive,
   **coalescing** a burst into one digest per interval; both recipients may be several
-  comma-separated addresses. The digest carries **no admin-console link** — an admin URL must
-  never travel in an email, where a mail provider could cache or index it; the operator opens the
-  console directly. Both paths are inert unless configured.
+  comma-separated addresses. Both paths are inert unless configured.
 - Per-request server-side timing via gin middleware from day one (the access log
   carries method, route, status, latency and the active trace id). A
   client-measured RTT piggybacked on the next request is a later enhancement.
@@ -1237,76 +1233,7 @@ origin, so the test contour canonicalises to production instead of being indexed
 separate site; the SPA shell is `noindex`, and the landing always boots in Russian (no
 browser-language detection — crawlers render with arbitrary languages). The favicon set,
 `og-image.png` and `robots.txt` ship unhashed from `ui/public/` (generated by
-`assets/icons/`, same tile design as the VK loader). On the web (`/app/`) the SPA is an installable **PWA**:
-`manifest.webmanifest` ships unhashed from `ui/public/`, while the **service worker** (`sw.js`) is
-built from `ui/src/sw.ts` by **vite-plugin-pwa** (injectManifest strategy) — the client registers it
-**web-only**, never inside a Mini App or the mock build (the plugin is disabled there entirely). It
-**precaches the app shell and the hashed assets** (Workbox) so an installed PWA cold-launches with
-no network. Shell **navigations are network-first** — the fresh `no-cache` shell is fetched from the
-server (so a new deploy is picked up on the very next launch, not the one after), falling back to the
-precached shell only when the network is unreachable or too slow; the immutable hashed assets stay
-cache-first, and the hash router resolves the route client-side. This navigation route is registered
-**before** the precache route on purpose: Workbox matches in registration order, and the precache
-route (its `directoryIndex` is `index.html`) would otherwise shadow it and serve the shell
-cache-first — the old build's version until a second load. The landing page and the conditional
-polyfill bundle are excluded, and the Connect stream and runtime API POSTs are never precached nor
-intercepted, so the live app is never served stale. This satisfies Chromium's installability requirement (a registered SW, needed
-for install on Android) and powers the opt-in **offline mode** (in progress): a deliberate, device-scoped Settings
-toggle — distinct from the transient gateway-reachability signal — that tints the header blue with
-an *Offline* chip and confines play to on-device `vs_ai` games. The **offline lobby lists only those
-device-local games** (reconstructed by replaying the IndexedDB move journal) and its New-vs-AI entry
-creates one through the in-browser engine — the same game screen then drives it, the robot replying
-locally; online-only affordances (the Stats tab, the random-opponent option) are disabled
-or hidden, and New Game's *with friends* becomes the entry to **local pass-and-play (hotseat)**.
-A hotseat game is a device-local **2-4 human** game built through the same engine (`hotseat` +
-per-seat/host PIN locks on the record; the seats carry names but no accounts). A **mandatory host
-(referee) PIN** gates the roster at creation and, in-game, the referee overrides — **skip** the
-current turn, **exclude** a player (a forced seat resign, `resignSeat`) or **terminate** the game
-(deleted, no winner/loser); each seat may also carry its own **optional PIN** that withholds its rack
-(the board stays visible — only the tray is gated) until it is entered, so players pass the device
-around freely and lock a seat only against a distrusted tablemate. The unlock is **per turn**
-(re-locks on advance). PINs are a **social lock, not cryptography** — a salted SHA-256 kept only in
-the device record (`lib/pin`); a 4-digit PIN is trivially brute-forceable and the racks live in
-client memory regardless, so they defeat a casual glance, not a determined peek. A hotseat game is
-**not `vs_ai`**: hints (the freed control becomes the host button) and chat/self-resign are gone, and
-its lobby card — active *and* finished — is master-PIN-gated to delete (so the last mover cannot
-instantly wipe it); a naturally finished game is saved with its result like any local game. A `vs_ai`
-hint (online and offline alike) is unlimited and wallet-free but idle-gated
-(unlocked ~30 min into a stuck turn), and counts toward no hint statistic. The **source** reports the
-**seconds left** (`hint_unlock_left_seconds` on the game view) — computed by the **backend from the
-server clock** online (which also enforces the gate, returning `hint_locked` for an early request),
-and by the offline source from the device clock (persisted, capped at the window). The **client
-anchors a MONOTONIC countdown** (`performance.now()`, `lib/hints`) to that seconds-left when it lands
-(on load, and to the full window when the robot moves), so a client clock change cannot skew it, and
-a relaunch re-reads a fresh value so the wait is not forgotten. To have data ready before the switch, the **Profile advertises the current dictionary
-version per variant** (`dict_versions`,
-filled from the registry on the existing cold-start profile request — no extra round-trip), and an
-eligible installed PWA (standalone web + confirmed email) **background-preloads** those dictionaries
-— on lobby entry and on a variant-preference change — through the same three-tier loader, retried
-with backoff and honouring the session miss-breaker; the move generator, the loader and the preload
-orchestration stay in lazy chunks. A first-lobby preload failure shows a *poor-connection* notice in
-the ad-banner slot. Flipping the Settings toggle **to** offline runs that same cache-first fetch
-bounded by a ~5 s UI wait (`raceOfflineReady` + the lazy `dict/offlineready`): it enters offline only
-once every enabled variant is ready, otherwise it stays online with a *needs internet* note while the
-fetch finishes in the background (the next flip is then instant). A **cold launch already in offline
-mode** boots from the persisted session and
-profile (the profile is saved on every online adopt/refresh) — `bootstrap` skips the session
-adoption and profile fetch that would otherwise hang with no network, and lands straight in the
-offline lobby; without a cached profile (an install that was never online) it drops the sticky flag
-and boots online instead. Beyond the sticky toggle the app **auto-detects connectivity**: the
-reactive flag carries an *auto* bit, so a self-entered offline (no network) is transient
-(session-only, never persisted) and self-heals to online when the network returns, while a deliberate
-one (the toggle, or the cold-start dialog's *Switch*) persists. At cold start `navigator.onLine ===
-false` enters offline for the session; otherwise a single bounded reachability probe (a `profile.get`,
-~3 s) decides — success boots online, a timeout on an eligible install raises a *No connection* dialog
-(*Switch* = sticky offline, *Wait for network* = boot online with the reachability watcher retrying).
-Mid-session the `window` `online`/`offline` events drive it — `offline` auto-enters, `online`
-re-verifies reachability before returning — backed by a `navigator.onLine` poll because those events
-are unreliable on some platforms (notably iOS PWAs). Offline is a real **transport kill switch**
-(every gateway call is refused, so no traffic leaks); the reachability probe is the one call exempt
-from it (it is the return-to-online mechanism), and the transient reachability watcher is suppressed
-while offline. The gateway registers the `.webmanifest` MIME type
-in-process (the distroless image has no `/etc/mime.types`). Hash-named `/assets/*` are served
+`assets/icons/`, same tile design as the VK loader). Hash-named `/assets/*` are served
 `immutable` (a relaunch is a cache hit, not a re-download); the HTML shells are
 `no-cache` so a new deploy is picked up — both containers apply the same caching. An
 in-compose **caddy** is the contour's edge: it owns a single `/_gm` Basic-Auth and

docs/FUNCTIONAL.md

@@ -21,8 +21,7 @@ Settings also pick the board's bonus-label style (beginner / classic / none). A
 costs nothing when the rack has no legal move. The word-check accepts only the
 variant's alphabet, remembers answers within the session and rate-limits repeats.
 A public **landing page** at the site root introduces the game, switches language and
-theme, and links to the Telegram game channel, the VK Mini App and the **web version**
-(`/app/`) — each under a caption (Telegram / VK / Веб-версия); the game itself runs at
+theme, and links to the Telegram game channel and the VK Mini App; the game itself runs at
 `/app/` (web), `/telegram/` (the Telegram Mini App) and `/vk/` (the VK Mini App). The landing's theme is ephemeral
 (it follows the system scheme, not the saved preference); its language choice is saved. The
 landing always opens in **Russian** — the browser language is never auto-detected (crawlers
@@ -32,11 +31,6 @@ nondeterministic); a saved 🌐 choice still wins. The page carries a static Rus
 pinned to the production origin, JSON-LD, the favicon set and `robots.txt`), while the SPA
 shell is `noindex` — the landing is the only indexable page.
 
-On the plain web the client is an **installable PWA**: a logged-out player sees an install
-call-to-action under the login form (and at the bottom of Settings) that installs the app to the
-home screen / desktop in one tap where the browser supports it (Chromium), or shows manual
-Add-to-Home-Screen steps on iOS Safari; it is hidden once installed and inside the Mini Apps.
-
 ### First-run onboarding
 The first time a player opens the app it walks them through the interface with a light
 **coachmark overlay**: a dimmed layer draws one hint bubble at a time, each pointing — with a
@@ -76,9 +70,7 @@ per address), so a mistyped address or an impatient tap cannot flood an inbox. T
 also carries a **one-tap link** that confirms the address — or signs the player straight
 in — in a single tap; opening it in another browser reflects in the app at once, and a
 mail scanner that merely fetches the link cannot reach it — the token rides the URL
-fragment, which is never sent to the server. A sign-in requested from an **installed PWA** omits
-this link: the email carries only the code, entered in the same window, since the link would open
-in a separate browser the app cannot reach.
+fragment, which is never sent to the server.
 Telegram runs a **single bot**: every player uses
 the same bot, and all of its chat and out-of-app notifications are written in the
 player's own **interface language** (en/ru). A separate optional **promo bot** can run alongside the
@@ -215,16 +207,7 @@ unlimited and offers a complaint on any result; for a word it finds, it also lin
 external reference dictionary (gramota.ru for Russian games, scrabblewordfinder.org for
 English) to look it up. Hints are governed per game —
 whether they are allowed and how many each player starts with — and draw on a
-personal hint wallet once the per-game allowance is spent. Against the robot
-(**vs_ai**) hints are instead **unlimited and wallet-free**, but idle-gated as an
-anti-frustration aid: one unlocks only after the player has been **stuck ~30 minutes
-on a turn** (timed from the robot's last move; the very first move, before the robot
-has played, is exempt). While gated the hint button carries a small **🔒 lock** and a
-tap shows how long remains; the lock lifts live at the mark. The same gate applies **online and
-offline**: the countdown runs on a **steady in-app timer**, not the device clock, so changing the
-clock cannot skew it, and a relaunch re-reads the remaining time so a stuck turn is not forgotten.
-Online the **server enforces** it from its own clock (which the player cannot touch); a vs_ai hint
-counts toward no hint statistic. The game ends when the
+personal hint wallet once the per-game allowance is spent. The game ends when the
 bag empties and a player clears their rack, after 6 consecutive scoreless turns,
 by resignation, or by the per-game move timeout (5 minutes to 24 hours, default
 24 hours): a missed turn auto-resigns, except while the player is inside their
@@ -265,44 +248,6 @@ the same occasional move against its plan that fades out by the endgame), and ch
 add-friend are off. AI games are **practice** — they never count toward a player's
 statistics.
 
-### Offline mode
-An installed web PWA signed in with a confirmed email can switch to a deliberate **offline mode**
-(Settings → Play mode). Offline, the app never touches the network: the header turns blue with an
-*Offline* chip, the lobby lists only the games stored on the device, and online-only surfaces are
-disabled or hidden (the Stats tab; the *random opponent* option in New Game).
-A New Game against the robot creates a device-local **vs_ai** game — it
-plays entirely in the browser with no backend. Local games are kept on the device, visible only in
-offline mode, and never sync to the account. So a game can be created and played with no connection,
-the app quietly preloads the dictionaries for the player's enabled variants while still online, and
-(once installed) launches from a precached shell even with no network. Switching **to** offline first
-checks that the enabled variants' dictionaries are on the device — if any are missing it fetches them
-and waits briefly, and if they cannot be readied it stays online with a short *needs internet* note
-(the download keeps running in the background, so a later switch is instant). The mode is
-device-scoped and sticky across launches.
-
-Offline, New Game's **with friends** starts a **local pass-and-play** game for 2-4 people sharing one
-device. You first set a **host (leader) password** — a 4-digit PIN entered on a lock-screen-style
-keypad; until it is set the player rows stay locked. The app then asks whether you are playing too —
-if so you take the first seat with your profile name. You name each player (2 to 4; add or remove
-rows, where a removal asks for the leader password) and may give any seat its **own optional PIN**.
-During the game the board is always visible, but a PIN-locked seat shows an **Unlock** button in place
-of its rack until its owner enters the PIN — so the device passes hand to hand and only a protected
-seat hides its letters; the lock returns each turn. The **leader** (the host button in the game) can,
-with the leader password, **skip** the current player's turn, **remove** a player, or **end the game
-early** — an early end discards the game with no winner or loser. Hints and chat are off in a
-pass-and-play game. A game that finishes normally is saved to the offline lobby like any other;
-deleting any pass-and-play game — running or finished — from the lobby asks for the leader password,
-so no one can wipe a game the moment they have moved.
-
-The app also **enters offline mode on its own** when it cannot reach the network. On a cold launch
-with no connection it switches to offline for that session; when the device is online but the gateway
-stays silent for a few seconds it asks first — *No connection. Switch to offline mode?*, with
-**Switch** (go offline) or **Wait for network** (keep retrying online). While the app is open, losing
-the network — airplane mode — switches to offline automatically, and restoring it returns online by
-itself. A self-entered offline is temporary: it reverts to online the moment the network is back, and
-the next launch re-checks. A **deliberate** offline — the Settings toggle, or **Switch** in that
-dialog — is the player's choice: it is kept, and never undone automatically.
-
 ### Social: friends, block, chat, nudge
 Become friends in two ways: redeem a **one-time code** the other player issues (six
 digits, valid for twelve hours), or send a **request to someone you have played

docs/FUNCTIONAL_ru.md

@@ -22,8 +22,7 @@ top-1 подсказку, безлимитную проверку слова с
 Проверка слова принимает только алфавит варианта, запоминает ответы в рамках сессии
 и ограничивает частоту повторов.
 Публичная **посадочная страница** в корне сайта представляет игру, переключает язык и
-тему и ведёт в Telegram-канал игры, в VK Mini App и в **веб-версию** (`/app/`) — каждая под
-подписью (Telegram / VK / Веб-версия); сама игра живёт по адресам
+тему и ведёт в Telegram-канал игры и в VK Mini App; сама игра живёт по адресам
 `/app/` (веб), `/telegram/` (Telegram Mini App) и `/vk/` (VK Mini App). Тема на странице эфемерна (берётся из
 системной настройки, а не из сохранённой), выбор языка сохраняется. Страница всегда
 открывается на **русском** — язык браузера не определяется автоматически (роботы
@@ -34,11 +33,6 @@ Open Graph, которую используют превью ссылок в Tel
 продакшен-домена, JSON-LD, набор favicon и `robots.txt`), а оболочка SPA помечена
 `noindex` — индексируется только посадочная страница.
 
-В обычном вебе клиент — **устанавливаемое PWA**: незалогиненный игрок видит призыв к установке
-под формой входа (и внизу «Настроек»), который в один тап ставит приложение на рабочий стол
-(домашний экран) там, где браузер это умеет (Chromium), либо показывает ручные шаги
-«На экран „Домой“» в Safari на iOS; он скрыт после установки и внутри Mini App.
-
 ### Первый запуск: онбординг
 При первом открытии приложения игрока один раз проводят по интерфейсу лёгким
 **coachmark-оверлеем**: затемнённый слой показывает по одной подсказке-«облачку» за раз, каждое
@@ -80,9 +74,7 @@ launch-параметрам VK (их проверяет gateway), и при пе
 не завалили почтовый ящик. В письме также есть **ссылка одного нажатия**, которая подтверждает
 адрес — или сразу выполняет вход — в один тап; открытие её в другом браузере тут же отражается в
 приложении, а почтовый сканер, который просто загружает ссылку, до токена не дотянется —
-он едет в URL-фрагменте, который не уходит на сервер. Вход, запрошенный из **установленного
-PWA**, эту ссылку не содержит: в письме только код, который вводится в том же окне (ссылка
-открылась бы в отдельном браузере, недоступном приложению).
+он едет в URL-фрагменте, который не уходит на сервер.
 Telegram держит **единого бота**: все игроки пользуются одним
 и тем же ботом, а весь его чат и внеприложенческие уведомления пишутся на **языке
 интерфейса** самого игрока (en/ru). Рядом с основным может работать отдельный опциональный
@@ -222,16 +214,7 @@ e-mail) либо ввод фразы. Активные игры форфейтя
 внешний справочный словарь (gramota.ru для русских игр, scrabblewordfinder.org для английских),
 чтобы его посмотреть. Подсказки управляются настройками
 партии — разрешены ли они и сколько их у каждого игрока на старте — и расходуют
-личный кошелёк подсказок после исчерпания внутриигрового лимита. Против робота
-(**vs_ai**) подсказки, наоборот, **безлимитны и без кошелька**, но с idle-гейтом как
-анти-фрустрация: подсказка открывается, только когда игрок **застрял на ходу ~30 минут**
-(отсчёт от последнего хода робота; самый первый ход, до хода робота, исключён). Пока гейт
-закрыт, кнопка подсказки несёт маленький **🔒 замок**, а тап показывает, сколько осталось;
-замок снимается вживую в нужный момент. Один и тот же гейт работает **онлайн и офлайн**: отсчёт
-идёт по **ровному внутриигровому таймеру**, а не по системным часам, поэтому их перевод его не
-собьёт, а повторный вход перечитывает остаток — застрявший ход не забывается. Онлайн гейт
-**принуждает сервер** по своим часам (их игрок не тронет); vs_ai-подсказка не учитывается ни в
-одной статистике подсказок. Партия
+личный кошелёк подсказок после исчерпания внутриигрового лимита. Партия
 завершается, когда мешок пуст и игрок выложил стойку, после 6 подряд бесплодных
 ходов, по сдаче, либо по таймауту хода (от 5 минут до 24 часов, дефолт 24 часа):
 пропущенный ход означает авто-сдачу, кроме как когда игрок внутри своего
@@ -270,45 +253,6 @@ e-mail) либо ввод фразы. Активные игры форфейтя
 паузы), сохраняет ту же силу (по-прежнему играет на победу лишь примерно в 40% партий, с теми же
 редкими ходами вопреки плану, затухающими к эндшпилю), а чат, nudge и «добавить в друзья» выключены. Партии с ИИ — это **тренировка**: они не идут в статистику игрока.
 
-### Офлайн-режим
-Установленный веб-PWA со входом по подтверждённой почте может переключиться в осознанный
-**офлайн-режим** (Настройки → Режим игры). В офлайне приложение не обращается к сети: шапка синеет с
-меткой *Офлайн*, лобби показывает только сохранённые на устройстве игры, а сетевые поверхности
-отключены или скрыты (вкладка Статистика; вариант «случайный соперник» в Новой игре).
-Новая игра против робота создаёт локальную **vs_ai**-игру — он ходит
-целиком в браузере без бэкенда. Локальные игры хранятся на устройстве, видны только в офлайн-режиме и
-никогда не синхронизируются с аккаунтом. Чтобы игру можно было создать и сыграть без связи, приложение
-заранее, пока ещё онлайн, подгружает словари включённых игроком вариантов и (после установки)
-запускается из прекешированного шелла даже без сети. Переключение **в** офлайн сначала проверяет, что
-словари включённых вариантов есть на устройстве — если каких-то не хватает, оно их подгружает и недолго
-ждёт, а если подготовить их не удаётся, остаётся онлайн с короткой заметкой *нужен интернет* (загрузка
-продолжается в фоне, так что следующее переключение мгновенно). Режим привязан к устройству и
-сохраняется между запусками.
-
-В офлайне «с друзьями» в Новой игре запускает **локальную игру по очереди (hotseat)** на 2–4 человек
-за одним устройством. Сначала задаётся **пароль ведущего** — 4-значный PIN на клавиатуре в стиле
-экрана блокировки; пока он не задан, строки игроков заблокированы. Затем приложение спрашивает,
-играете ли вы сами — если да, вы занимаете первое место под именем из профиля. Вы называете каждого
-игрока (от 2 до 4; строки можно добавлять и удалять, удаление спрашивает пароль ведущего) и можете
-дать любому месту **свой необязательный PIN**. Во время игры доска видна всегда, но место с PIN
-вместо стойки показывает кнопку **«Разблокировать»**, пока владелец не введёт PIN, — так устройство
-передаётся из рук в руки, и только защищённое место прячет свои буквы; на каждом ходу замок
-возвращается. **Ведущий** (кнопка ведущего в игре) может по паролю ведущего **пропустить** ход
-текущего игрока, **исключить** игрока или **завершить игру досрочно** — досрочное завершение стирает
-партию без победителей и проигравших. Подсказки и чат в игре по очереди отключены. Нормально
-завершённая партия сохраняется в офлайн-лобби как любая другая; удаление любой игры по очереди —
-идущей или завершённой — из лобби спрашивает пароль ведущего, чтобы никто не стёр партию сразу после
-своего хода.
-
-Приложение также **само включает офлайн-режим**, когда не может достучаться до сети. При холодном
-запуске без связи оно переходит в офлайн на текущую сессию; когда устройство онлайн, но шлюз молчит
-несколько секунд, оно сперва спрашивает — *Нет связи. Включить офлайн-режим?*, с выбором **Включить**
-(уйти в офлайн) или **Ждать сеть** (продолжить попытки онлайн). Пока приложение открыто, потеря сети —
-режим полёта — переключает в офлайн автоматически, а её восстановление само возвращает онлайн.
-Самостоятельно включённый офлайн временный: он возвращается в онлайн, как только сеть появилась, и
-следующий запуск проверяет заново. **Осознанный** офлайн — тумблер в Настройках или **Включить** в том
-диалоге — это выбор игрока: он сохраняется и никогда не отменяется автоматически.
-
 ### Социальное: друзья, блок, чат, nudge
 Подружиться можно двумя способами: погасить **одноразовый код**, который выпускает
 другой игрок (шесть цифр, действует двенадцать часов), либо отправить **заявку

docs/PAYMENTS.md

@@ -1,333 +0,0 @@
-# PAYMENTS — monetization mechanics
-
-Authoritative specification of the monetization domain: the in-game currency, wallets,
-benefits, store-compliance rules, payment intake, ads, catalog, ledger, and reporting.
-English is authoritative; [`PAYMENTS_ru.md`](PAYMENTS_ru.md) mirrors it in plain Russian
-(mirror every point edit in the same PR, like `FUNCTIONAL.md`/`FUNCTIONAL_ru.md`).
-
-Read this before changing any payments behaviour. The technical implementation plan lives
-in [`../PLAN.md`](../PLAN.md).
-
-> Status: specification approved; implementation staged (see `PLAN.md`). Nothing here is
-> live yet.
-
-## 1. Overview
-
-The game earns through two orthogonal channels:
-
-- **Purchases** of the in-game currency **Фишка** (chips) with real money, then spending
-  chips on **values** (benefits).
-- **Ads** — a rewarded video tops chips up; an interstitial and a house banner monetize by
-  impression.
-
-The currency is **two-tier**:
-
-```
-money (VK Votes / TG Stars / RUB via Robokassa)  ─┐
-                                                  ├─►  Фишки (chips)  ──►  values
-rewarded ad view                                 ─┘                         (no-ads, hints,
-                                                                             tournament fee)
-```
-
-Chips are the single storefront unit. Money and rewarded views **fund** chips; chips
-**buy** values. There is no path that spends money directly on a value — always through
-chips.
-
-## 2. Currency model
-
-**One chip is one chip everywhere** — the unit is uniform. The difference between payment
-methods lives entirely in the **purchase rate**: a chip pack costs *X* Votes / *Y* Stars /
-*Z* RUB, and the rate absorbs each store's commission. Value prices are fixed **in chips**
-and identical across methods.
-
-The chip balance is **segmented by `source`** — the platform where the chips were funded:
-
-| `source`   | Funded by                        |
-|------------|----------------------------------|
-| `vk`       | VK Votes purchase, VK rewarded ad |
-| `telegram` | TG Stars purchase                |
-| `direct`   | Robokassa purchase (web / native)|
-
-A single account holds all three segments simultaneously: `balance = (account_id, source)`,
-exactly three rows. Segmentation is **not** per-identity — see §6.
-
-Why segmented, not one pooled balance: store rules forbid activating value that was paid
-for outside the store's own cash desk. Chips funded inside VK (Votes) may only be spent in
-the VK context; Stars only inside Telegram; Robokassa-funded (`direct`) chips only outside
-the stores. See §4.
-
-## 3. Three operations, kept distinct
-
-Do not conflate these — they use different keys:
-
-1. **Fund chips** — money/ad → chip `source` segment, keyed by the **execution context**.
-2. **Spend chips = buy a value** — segment → benefit, keyed by context with the gate (§4).
-   This is where a benefit is **born** and stamped with its `origin`.
-3. **Apply a benefit** over time (e.g. "no-ads until *T*") — governed by the origin rule
-   (§5).
-
-`source` (where chips were funded) and `origin` (where a value was bought) share the same
-value set `{vk, telegram, direct}` but mean different things. On the web they can diverge:
-web spending may draw `vk` chips (`source=vk`) into a `direct` purchase (`origin=direct`).
-
-## 4. Store-compliance gate
-
-The compliance wall is **one-directional**. The dangerous direction — activating externally
-paid value *inside* a store wrapper — is blocked; the safe direction (a store benefit
-leaking out to the open web) is allowed.
-
-**Spend context → which segments/benefits are usable:**
-
-| Execution context   | Spendable chip segments | Spend priority     |
-|---------------------|-------------------------|--------------------|
-| Inside VK (Android) | `vk`                    | —                  |
-| Inside VK (iOS)     | none — frozen (view only)| —                 |
-| Inside Telegram     | `telegram`              | —                  |
-| Web / native (Direct)| `direct` + `vk` + `telegram` | direct → vk → tg |
-
-- Inside VK/TG only the same-named segment is usable; everything else (chiefly `direct`) is
-  invisible-as-spendable there.
-- On the web the store has no jurisdiction, so all attached segments are spendable, drained
-  by priority direct → vk → tg.
-- **VK iOS** is frozen for spending (Apple forbids spending virtual currency on digital
-  goods outside IAP inside VK on iOS): the balance is shown as a number, but no purchase or
-  spend is possible. A previously bought benefit still *applies* there.
-
-The account is **single** (identities merge, one profile/friends/stats). The gate is
-**logical**: in a VK/TG context the server activates only the same-named segment. It rests
-on a **trusted platform signal** (§8) — the client is never believed. When the platform
-cannot be trusted, the gate is **fail-closed**: spends/purchases are denied, view only.
-
-### One-directional benefit application
-
-A benefit carries `origin` = the **purchase context** (not "what it was paid with"). Buying
-on the web with `vk` chips still yields `origin=direct`.
-
-| `origin`         | Where the benefit applies                          |
-|------------------|----------------------------------------------------|
-| `vk` / `telegram`| **Everywhere** — inside its store *and* out on web/native |
-| `direct`         | **Only** web/native — never inside VK/TG (= store ban) |
-
-Before a web spend draws `vk`/`telegram` chips, the UI **warns** the user that the value
-will be available here (web/native) only, because of VK/TG restrictions.
-
-## 5. Benefits
-
-Three distinct entities, do not merge:
-
-- **Chips** — currency. Segment by `source`.
-- **Hints** — consumable, bought with chips. Segment by `origin`. Spent one-per-hint in
-  online games; `vs_ai` hints stay free/unlimited (30-min idle gate, not counted). A hint
-  spent in a game is drawn from an `origin` applicable to the current context (same
-  one-directional relaxation as above).
-- **No-ads** — a duration benefit, bought with chips. Segment by `origin`.
-
-**No-ads stacking.** Buying a term extends `paid_until[origin] += term` from
-`max(now, current end)` — the remainder is never lost ("terms add up"). **Forever** is a
-separate perpetual flag that overrides terms. "Ads off in context *P*" ⇔ some `origin`
-applicable in *P* has `paid_until > now` (on the web take the max over direct/vk/tg; in VK
-only vk; in TG only tg).
-
-**What no-ads suppresses:** the top banner **and** the post-move fullscreen interstitial.
-The voluntary **rewarded** view (for chips) is never suppressed — it is the user's choice.
-
-**Tournament fee** — a future value type; the atom is provisioned but the mechanic ships
-later.
-
-## 6. Wallet lifecycle
-
-**Segment availability rule.** A segment is spendable ⇔ the account has an identity of that
-`source` (for `direct`: a durable identity/email). This makes unlink/merge fall out
-naturally.
-
-**Unlink (vk/tg).** Allowed even with a non-zero balance/active benefit. The segment is not
-burned — it **sleeps** (no identity ⇒ unavailable in VK *and*, lacking the attachment,
-unavailable as an attached web segment); re-linking wakes it. The user is warned before
-unlinking ("N chips will be unavailable until you re-link"). The last identity cannot be
-unlinked (existing `ErrLastIdentity`).
-
-**Merge.** Segments and benefits merge **by origin**: same-origin segments add (chips sum,
-benefit terms extend per origin), different origins coexist. This extends the current
-account-merge (`hint_balance +=`, `paid_account OR=`) so origin is preserved and nothing
-leaks across platforms.
-
-**Guest.** A guest account has **no wallet at all** — the Wallet section is hidden, no
-purchases, no balance, by design. Balances belong only to durable accounts. The guest
-reaper therefore deletes guests freely (no money can exist there). In `direct`, email is
-required **before the first purchase** as a recovery anchor (in VK/TG the vk/tg identity is
-already the anchor); the existing email flow (request code → confirm → clear guest →
-durable) is reused.
-
-## 7. Catalog and pricing
-
-The catalog is **configurable** — products, prices, purchase rates, and rewarded payout
-live in the database and are edited in the admin console, no release required.
-
-- **Base values (atoms):** chips, hints, no-ads days, tournament entry.
-- **Product = a set of atoms + a price.** Sold singly or as a combo (e.g. "250 hints + 30
-  no-ads days").
-- **Chip pack** (funds chips) — priced **per method** (multi-currency Votes/Stars/RUB) as a
-  single product.
-- **Value** (bought with chips) — priced **in chips** (uniform across methods).
-
-**Deactivation, not deletion.** Products are soft-deleted (deactivated). A completed
-purchase stores a **snapshot** of what was sold (atom composition + price at the time) into
-an archive, so history/receipts/tax are independent of later catalog edits.
-
-## 8. Trusted platform signal
-
-The gate (§4) needs a **trusted, unforgeable** platform context on the server. The client is
-never the source of truth.
-
-- The platform is a **property of the session**, re-confirmed by a fresh signature on **every
-  cold start** — VK launch-params `sign` / TG `initData` (validator already exists at
-  `platform/telegram/internal/initdata`). VK/TG wrappers resend the signature on every open,
-  so this is not a one-time login.
-- `direct` is established by the fact of a web/native session's creation (no external
-  signer, and none needed — reaching vk/tg segments in a direct context still requires a
-  real attachment, §6).
-- The platform carries **kind** (`vk`/`telegram`/`direct`) **plus subtype**
-  (`ios`/`android`/`web`) — the subtype is mandatory (VK iOS is frozen).
-- The gateway resolves the session and passes `platform` to the backend (alongside the
-  existing `X-User-ID`).
-- **Fail-closed:** an untrusted/unconfirmed platform (a VK/TG session without a valid
-  cold-start signature; an old session with no recorded platform) denies spends/purchases
-  and applying any foreign origin — view only.
-
-## 9. Payment intake
-
-**Server callback only.** Chips are credited solely on a **verified** (signature/HMAC)
-provider callback — Robokassa webhook / TG `successful_payment` / VK callback. A client "I
-paid" is ignored.
-
-**Single writer.** One payments domain is the only writer of the ledger. Public webhooks
-(Robokassa/VK) terminate at the edge (Caddy/gateway) and proxy into payments; TG
-`successful_payment` reaches the bot, which forwards into payments. One place credits and
-dedupes.
-
-**Order-flow.** The server pre-creates an `order(pending)` with account / platform / pack /
-expected amount / origin. The `order_id` is threaded to the provider (Robokassa `InvId` / TG
-`invoice_payload` / VK `item` — confirm the exact VK field at integration). The callback
-matches by `order_id` (never by amount, so equal-amount collisions cannot happen), verifies
-the amount, credits, marks `paid`. **Idempotency:** dedup by `(provider, provider_payment_id)`.
-
-**Pending is invisible** to the user; it auto-expires on a timeout (~30 min, DB hygiene). A
-valid callback is **always** honoured, even on an expired order (`expired` ≠ cancellation —
-the money is real, the chips are owed). The user sees only successful purchases.
-
-**TG bot outbox.** `successful_payment` reaches the bot only (Bot API, not the Mini App), and
-the bot host is weak and can lose connectivity, so the bot is a durable link. Store-and-
-forward on **SQLite** on the bot's disk: receive → store → ack the Telegram update → forward
-to payments (idempotent, dedup by `telegram_payment_charge_id`) → ack → mark `forwarded`.
-Retries with backoff; re-drives undelivered on restart. At-least-once delivery + idempotent
-intake = credited exactly once.
-
-**Events.** The payments domain writes `payment_events` (succeeded / failed / refunded); a
-dispatcher fans out over channels — the live gRPC stream if the user is in-app, else the
-existing `botlink` push / email relay. "Payment failed" (an **active** provider decline, not
-an abandoned pending) is surfaced to the user; "payment succeeded" is a hook (email / bot
-message).
-
-**Refunds.** ToS is **non-refundable** — we do not offer refunds to the user. An admin may
-issue a **manual** refund (edge case: a user demands one shortly after paying / closes their
-account — tie into `accountdelete`, which already preserves messages). **External** refunds
-(chargeback / store decision / TG / VK) are honoured: the system takes the `refunded` event,
-**best-effort** revokes the benefit (never going negative; if chips were already spent, it
-records the loss + an abuse flag), and writes to the ledger. The ledger is **export-ready**
-for future tax reporting and Robokassa reconciliation (reconciliation itself is not built
-yet; the schema stays compatible).
-
-## 10. Ads
-
-**Launch scope: VK only** for video (rewarded payout in RUB, ОРД automatic, API ready).
-web/native/TG keep the existing house **text banner** only; video is deferred until a
-ruble-paying in-app network exists. The ad provider is behind an **abstraction** so a future
-network for other platforms slots in without rework. Crypto-payout networks (AdsGram/AdMob)
-are rejected — no legal ruble income for a self-employed (НПД) developer.
-
-**Rewarded** (voluntary video for chips) credits chips through payments on the network's
-**server verify callback** (client not believed, like a payment). On-launch anti-fraud is
-the provider's verify only (no own daily cap yet; the abstraction allows adding caps later).
-
-**Interstitial** (post-move fullscreen), configurable server-side values:
-
-- Global cooldown **per user, across all games**, default **5 min**.
-- **`vs_ai` — 30 min** (aligned with the hint cooldown, so it does not scare casual players).
-- Applying a **hint** triggers a post-move interstitial **independently** of the main
-  cooldown, with its own **1-min** cooldown.
-- Offline — banner only.
-- Respect VK's own frequency caps.
-
-**No ads offline** beyond the house banner. The `no-ads` benefit suppresses the banner via
-the existing `ads.Eligible` (`backend/internal/ads/ads.go`), which is extended to gate on
-the **origin benefit applicable in the current context** rather than one global flag.
-
-## 11. Admin, audit, reporting
-
-**Append-only ledger + materialized balance.** The operations ledger is **INSERT-only**
-(never UPDATE/DELETE — full audit). Segment balances `(account, source)` and benefits
-`(account, origin)` are a fast **materialized** cache, updated **in the same transaction** as
-the ledger write, and recomputable from the ledger for reconciliation.
-
-**Admin rewards.** An admin grants **concrete values only** (no-ads / hints) — **never
-chips** (a gifted currency balance = a store cash-desk bypass). The admin **picks the
-origin** at grant time (compliance is on them: `origin=vk` point-wise/low-volume = low risk,
-`origin=direct` = safe). A grant is a ledger transaction of type `admin_grant`, price 0
-chips — full audit of rewards.
-
-**Per-user financial report** in the admin console `/_gm` — segment balances, payments,
-spends, grants, refunds, full history — as an extension of the existing user card
-(`UserDetailView`, `handlers_admin_console.go`). Plus a ledger export.
-
-## 12. Taxes and compliance
-
-Receipts are automatic **through the provider**, and differ by rail:
-
-- **Robokassa** (direct) — self-employed НПД receipt on payment.
-- **VK** — VK processes Votes through the tax authority itself; nothing to do.
-- **TG Stars** — no tax side (for a RU self-employed, Stars are not legally withdrawable = not
-  НПД income; accepted, no receipt issued).
-
-**ОРД** (ad marking) for VK ads is handled on VK's side. (Not legal advice — the owner
-confirms the exact НПД scheme with a tax advisor.)
-
-## 13. Distribution (native Android)
-
-- **RuStore** — Robokassa/external gate allowed (0%); native = clean `direct` context.
-- **Google Play** — direct purchases are **hidden**; the Wallet shows a stub ("install the
-  RuStore build to make purchases"). Rewarded ads and spending already-earned chips still
-  work. Confirm Google's current in-app-currency rules before the GP release.
-
-## 14. Data model (schema `payments`)
-
-The payments domain lives in its **own schema `payments`** in the shared Postgres instance,
-with its own DB role (rights limited to `payments`) and a domain package behind a hard
-interface. Cross-schema FKs to `backend.accounts` keep the chip↔benefit spend atomic in one
-transaction. Durability is **PITR** (continuous WAL archive), independent of DB topology.
-
-Core tables (final names/columns fixed in `PLAN.md`):
-
-- **ledger** — append-only operations: fund / spend / `admin_grant` / refund; `(provider,
-  provider_payment_id)` unique for idempotency; export-ready.
-- **balances** — materialized `(account_id, source) → chips`.
-- **benefits** — materialized `(account_id, origin)` → no-ads `paid_until`/`forever` +
-  hints count.
-- **catalog** — atoms + products (soft-deletable), per-method prices, chip-purchase rates,
-  rewarded payout.
-- **orders** — pending purchases, `order_id`, expected amount, origin, status
-  (pending/paid/expired).
-- **payment_events** — succeeded/failed/refunded for the dispatcher.
-
-Legacy `accounts.hint_balance` and `accounts.paid_account` are **deprecated** and dropped
-(expand-contract) in favour of the segmented model; neither was ever set in prod (no purchase
-flow existed), so legacy values are zeroed.
-
-## 15. Glossary
-
-- **Фишка / chip** — the in-game currency; uniform unit, segmented by `source`.
-- **source** — where chips were funded (`vk`/`telegram`/`direct`).
-- **origin** — where a value was bought; governs where the benefit applies.
-- **value / benefit** — what chips buy (no-ads, hints, tournament fee).
-- **gate** — the one-directional store-compliance rule (§4).
-- **ledger** — the append-only record of all money/value operations.
-- **rail** — a payment provider (Robokassa / VK Votes / TG Stars).

docs/PAYMENTS_ru.md

@@ -1,338 +0,0 @@
-# PAYMENTS — механики монетизации
-
-Русское зеркало [`PAYMENTS.md`](PAYMENTS.md) (английская версия — основная). Описывает
-домен монетизации: игровую валюту, кошельки, ценности, правила комплаенса сторов, приём
-платежей, рекламу, каталог, журнал операций и отчёты. Каждую правку `PAYMENTS.md` зеркалим
-сюда в том же PR (как `FUNCTIONAL.md`/`FUNCTIONAL_ru.md`).
-
-Читать перед любым изменением платёжного поведения. Технический план внедрения —
-[`../PLAN.md`](../PLAN.md).
-
-> Статус: спецификация утверждена; внедрение поэтапно (см. `PLAN.md`). В проде пока ничего
-> из этого нет.
-
-## 1. Обзор
-
-Игра зарабатывает двумя независимыми каналами:
-
-- **Покупки** игровой валюты **«Фишка»** за реальные деньги, затем трата Фишек на
-  **ценности** (бенефиты).
-- **Реклама** — ролик за награду пополняет Фишки; полноэкранный ролик и наш баннер
-  зарабатывают показами.
-
-Валюта **двухуровневая**:
-
-```
-деньги (Голоса VK / Stars TG / рубли через Robokassa)  ─┐
-                                                        ├─►  Фишки  ──►  ценности
-просмотр ролика за награду                             ─┘                (без рекламы,
-                                                                          подсказки,
-                                                                          турнирный взнос)
-```
-
-Фишки — единая единица витрины. Деньги и просмотры **пополняют** Фишки; Фишки **покупают**
-ценности. Прямой оплаты ценности деньгами нет — всегда через Фишки.
-
-## 2. Модель валюты
-
-**Одна Фишка равна одной Фишке везде** — единица единая. Разница между методами оплаты
-целиком в **курсе покупки**: пакет Фишек стоит *X* Голосов / *Y* Stars / *Z* рублей, и курс
-учитывает комиссию каждого стора. Цены ценностей фиксированы **в Фишках** и одинаковы для
-всех методов.
-
-Баланс Фишек **сегментирован по «источнику» (`source`)** — платформе, где Фишки пополнены:
-
-| `source`   | Чем пополняется                    |
-|------------|------------------------------------|
-| `vk`       | Покупка за Голоса VK, ролик за награду в VK |
-| `telegram` | Покупка за Stars TG                |
-| `direct`   | Покупка через Robokassa (web / native) |
-
-Один аккаунт держит все три сегмента одновременно: `баланс = (account_id, source)`, ровно
-три записи. Сегментация **не** по привязке (identity) — см. §6.
-
-Почему сегментировано, а не один общий баланс: правила сторов запрещают активировать
-ценность, оплаченную мимо их кассы. Фишки, пополненные внутри VK (Голоса), тратятся только
-в контексте VK; Stars — только внутри Telegram; Фишки от Robokassa (`direct`) — только вне
-сторов. См. §4.
-
-## 3. Три операции, которые нельзя путать
-
-Не смешивать — у них разные ключи:
-
-1. **Пополнить Фишки** — деньги/реклама → сегмент `source` Фишек, по **контексту
-   исполнения**.
-2. **Потратить Фишки = купить ценность** — сегмент → бенефит, по контексту с гейтом (§4).
-   Здесь бенефит **рождается** и помечается своим `origin`.
-3. **Применить бенефит** во времени (напр. «без рекламы до *T*») — по правилу `origin`
-   (§5).
-
-`source` (где пополнены Фишки) и `origin` (где куплена ценность) используют одно множество
-значений `{vk, telegram, direct}`, но значат разное. В вебе они расходятся: покупка в вебе
-может списать `vk`-Фишки (`source=vk`) в `direct`-покупку (`origin=direct`).
-
-## 4. Гейт комплаенса сторов
-
-Стена комплаенса **односторонняя**. Опасное направление — активация оплаченной снаружи
-ценности *внутри* обёртки стора — заблокировано; безопасное (бенефит стора действует
-наружу, в открытом вебе) — разрешено.
-
-**Контекст траты → какие сегменты/бенефиты доступны:**
-
-| Контекст исполнения  | Тратимые сегменты Фишек   | Приоритет траты    |
-|----------------------|---------------------------|--------------------|
-| Внутри VK (Android)  | `vk`                      | —                  |
-| Внутри VK (iOS)      | нет — заморожено (только просмотр) | —          |
-| Внутри Telegram      | `telegram`                | —                  |
-| Web / native (Direct)| `direct` + `vk` + `telegram` | direct → vk → tg |
-
-- Внутри VK/TG доступен только одноимённый сегмент; всё остальное (в первую очередь
-  `direct`) там невидимо как тратимое.
-- В вебе у стора нет юрисдикции, поэтому доступны все привязанные сегменты, списываются по
-  приоритету direct → vk → tg.
-- **VK iOS** заморожен для траты (Apple запрещает тратить виртуальную валюту на цифровые
-  товары мимо IAP внутри VK на iOS): баланс показывается числом, но покупка/трата
-  невозможны. Ранее купленный бенефит там всё равно *действует*.
-
-Аккаунт **единый** (привязки сливаются, один профиль/друзья/статистика). Гейт
-**логический**: в контексте VK/TG сервер активирует только одноимённый сегмент. Держится на
-**доверенном сигнале платформы** (§8) — клиенту не верим. Когда платформу нельзя доверенно
-установить, гейт **fail-closed**: траты/покупки запрещены, только просмотр.
-
-### Одностороннее применение бенефита
-
-Бенефит несёт `origin` = **контекст покупки** (не «чем оплачено»). Покупка в вебе за
-`vk`-Фишки всё равно даёт `origin=direct`.
-
-| `origin`         | Где действует бенефит                              |
-|------------------|----------------------------------------------------|
-| `vk` / `telegram`| **Везде** — внутри своего стора *и* наружу в web/native |
-| `direct`         | **Только** web/native — никогда внутри VK/TG (= бан) |
-
-Перед тратой в вебе `vk`/`telegram`-Фишек интерфейс **предупреждает**, что ценность будет
-доступна только здесь (web/native) из-за ограничений VK/TG.
-
-## 5. Ценности
-
-Три разные сущности, не смешивать:
-
-- **Фишки** — валюта. Сегмент по `source`.
-- **Подсказки** — расходник, покупается за Фишки. Сегмент по `origin`. Тратятся по одной в
-  онлайн-играх; в `vs_ai` подсказки бесплатны/безлимитны (30-мин кулдаун, не в счёт).
-  Подсказка в игре списывается из `origin`, применимого в текущем контексте (то же
-  одностороннее послабление).
-- **Без рекламы** — срок-бенефит, покупается за Фишки. Сегмент по `origin`.
-
-**Складывание «без рекламы».** Покупка срока продлевает `paid_until[origin] += срок` от
-`max(сейчас, текущий конец)` — остаток не теряется («сроки плюсуются»). **Навсегда** —
-отдельный вечный флаг, перекрывает сроки. «Реклама выключена в контексте *P*» ⇔ есть
-применимый в *P* `origin` с `paid_until > сейчас` (в вебе берём максимум по direct/vk/tg; в
-VK только vk; в TG только tg).
-
-**Что гасит «без рекламы»:** верхний баннер **и** полноэкранный ролик после хода.
-Добровольный **ролик за награду** (за Фишки) не гасится — это выбор пользователя.
-
-**Турнирный взнос** — будущий тип ценности; атом заложен, механика позже.
-
-## 6. Жизненный цикл кошелька
-
-**Правило доступности сегмента.** Сегмент тратим ⇔ на аккаунте есть привязка этого
-`source` (для `direct` — устойчивая привязка/email). Отсюда unlink/мерж выводятся
-естественно.
-
-**Отвязка (vk/tg).** Разрешена даже при ненулевом балансе/активном бенефите. Сегмент не
-сжигается — он **засыпает** (нет привязки ⇒ недоступен в VK *и*, без привязки, недоступен
-как подтянутый веб-сегмент); повторная привязка будит. Перед отвязкой предупреждение
-(«N Фишек станут недоступны до повторной привязки»). Последнюю привязку отвязать нельзя
-(существующий `ErrLastIdentity`).
-
-**Мерж.** Сегменты и бенефиты сливаются **по origin**: одноимённые складываются (Фишки
-суммируются, сроки бенефита продлеваются по origin), разные сосуществуют. Это расширяет
-текущий мерж аккаунтов (`hint_balance +=`, `paid_account OR=`), так что origin сохраняется и
-ничего не протекает между платформами.
-
-**Гость.** У гостевого аккаунта **вообще нет кошелька** — раздел «Кошелёк» скрыт, покупок
-нет, баланса нет, by design. Балансы — только у durable-аккаунтов. Поэтому чистильщик
-гостей удаляет их свободно (денег там быть не может). В `direct` email обязателен **перед
-первой покупкой** как якорь восстановления (в VK/TG якорь — сама vk/tg-привязка);
-переиспользуем существующий флоу email (запрос кода → подтверждение → снятие флага гостя →
-durable).
-
-## 7. Каталог и цены
-
-Каталог **конфигурируемый** — продукты, цены, курсы покупки и награда за ролик живут в базе
-и правятся в админке, без релиза.
-
-- **Базовые ценности (атомы):** Фишки, подсказки, дни без рекламы, участие в турнире.
-- **Продукт = набор атомов + цена.** Продаётся по одной или комбо (напр. «250 подсказок +
-  30 дней без рекламы»).
-- **Пакет Фишек** (пополняет Фишки) — цена **per-метод** (мультивалютная Голоса/Stars/руб)
-  одним продуктом.
-- **Ценность** (за Фишки) — цена **в Фишках** (единая для всех методов).
-
-**Деактивация, не удаление.** Продукты деактивируются (soft-delete). Состоявшаяся покупка
-хранит **снимок** проданного (состав атомов + цена на момент) в архиве, чтобы
-история/чеки/налоги не зависели от последующих правок каталога.
-
-## 8. Доверенный сигнал платформы
-
-Гейту (§4) нужен **доверенный, неподделываемый** контекст платформы на сервере. Клиент —
-никогда не источник правды.
-
-- Платформа — **свойство сессии**, переподтверждается свежей подписью на **каждом холодном
-  старте** — VK launch-params `sign` / TG `initData` (валидатор уже есть в
-  `platform/telegram/internal/initdata`). Обёртки VK/TG шлют подпись при каждом открытии,
-  так что это не одноразовый вход.
-- `direct` устанавливается самим фактом создания веб/native-сессии (внешней подписи нет и
-  не нужно — доступ к vk/tg-сегментам в direct-контексте всё равно требует реальной
-  привязки, §6).
-- Платформа несёт **kind** (`vk`/`telegram`/`direct`) **плюс подтип**
-  (`ios`/`android`/`web`) — подтип обязателен (VK iOS заморожен).
-- Гейтвей резолвит сессию и передаёт `platform` в бэкенд (рядом с существующим
-  `X-User-ID`).
-- **Fail-closed:** недоверенная/неподтверждённая платформа (VK/TG-сессия без валидной
-  подписи на холодном старте; старая сессия без записанной платформы) запрещает
-  траты/покупки и применение любого чужого origin — только просмотр.
-
-## 9. Приём платежей
-
-**Только серверный колбэк провайдера.** Фишки начисляются лишь по **проверенному**
-(подпись/HMAC) серверному колбэку — Robokassa webhook / TG `successful_payment` / VK
-callback. Клиентское «я оплатил» игнорируется.
-
-**Единственный писатель.** Один платёжный домен — единственный, кто пишет в журнал операций.
-Публичные вебхуки (Robokassa/VK) терминируются на краю (Caddy/gateway) и проксируются в
-платёжный домен; TG `successful_payment` приходит боту, тот форвардит в платёжный домен.
-Одно место начисляет и защищает от повторов.
-
-**Флоу заказа.** Сервер заранее создаёт `order(pending)` с account / платформой / пакетом /
-ожидаемой суммой / origin. `order_id` прокидывается провайдеру (Robokassa `InvId` / TG
-`invoice_payload` / VK `item` — точную форму VK уточнить при интеграции). Колбэк матчится по
-`order_id` (никогда по сумме, поэтому коллизии одинаковых сумм невозможны), сверяет сумму,
-начисляет, помечает `paid`. **Защита от повторов:** дедуп по `(провайдер,
-provider_payment_id)`.
-
-**Pending невидим** пользователю; авто-истекает по таймауту (~30 мин, гигиена базы).
-Валидный колбэк исполняется **всегда**, даже на истёкшем заказе (`expired` ≠ отмена —
-деньги реальны, Фишки должны быть выданы). Пользователь видит только успешные покупки.
-
-**Outbox TG-бота.** `successful_payment` приходит только боту (Bot API, не Mini App), а
-хост бота слабый и может терять связь, поэтому бот — durable-звено. Store-and-forward на
-**SQLite** на диске бота: получил → сохранил → подтвердил апдейт Telegram → форвардит в
-платёжный домен (идемпотентно, дедуп по `telegram_payment_charge_id`) → ack → пометил
-`forwarded`. Ретраи с backoff; дореталивает недоставленное при рестарте. Доставка
-at-least-once + идемпотентный приём = начисление ровно один раз.
-
-**События.** Платёжный домен пишет `payment_events` (succeeded / failed / refunded);
-диспетчер рассылает по каналам — live gRPC-стрим, если пользователь в аппе, иначе
-существующий пуш `botlink` / email. «Оплата не прошла» (**активный** отказ провайдера, не
-брошенный pending) доводится до пользователя; «оплата прошла» — хук (письмо / сообщение в
-бота).
-
-**Возвраты.** ToS — **невозвратно**, пользователю возврат не предлагаем. Админ может сделать
-**ручной** возврат (крайний случай: пользователь требует вскоре после оплаты / закрывает
-аккаунт — связано с `accountdelete`, где уже сохраняются сообщения). **Внешние** возвраты
-(чарджбек / решение стора / TG / VK) обрабатываются: система принимает событие `refunded`,
-**по возможности** отзывает бенефит (в минус не уходим; если Фишки уже потрачены —
-фиксирует убыток + флаг защиты от злоупотреблений), пишет в журнал. Журнал операций
-**спроектирован экспортопригодным** для будущей налоговой отчётности и сверки с Robokassa
-(саму сверку пока не строим; схема остаётся совместимой).
-
-## 10. Реклама
-
-**Охват на старте: только VK** для видео (награда в рублях, ОРД автоматом, API готов).
-web/native/TG держат только существующий наш **текст-баннер**; видео отложено до появления
-рублёвой in-app сети. Рекламный провайдер за **абстракцией**, чтобы будущая сеть для других
-платформ встроилась без переделки. Крипто-сети (AdsGram/AdMob) отвергнуты — нет легального
-рублёвого дохода самозанятому (НПД).
-
-**Ролик за награду** (добровольное видео за Фишки) начисляет Фишки через платёжный домен по
-**серверному verify-колбэку** сети (клиенту не верим, как платежу). Антифрод на старте — только
-verify провайдера (своего дневного потолка пока нет; абстракция позволит добавить лимиты
-позже).
-
-**Полноэкранный ролик** (после хода), конфигурируемые серверные значения:
-
-- Глобальный кулдаун **на пользователя, сквозь все партии**, дефолт **5 мин**.
-- **`vs_ai` — 30 мин** (соосно кулдауну подсказок, чтобы не отпугивать казуалов).
-- Применение **подсказки** триггерит ролик после хода **независимо** от основного кулдауна,
-  со своим кулдауном **1 мин**.
-- Оффлайн — только баннер.
-- Уважать собственные лимиты частоты VK.
-
-**Оффлайн без рекламы**, кроме нашего баннера. Бенефит `без рекламы` гасит баннер через
-существующий `ads.Eligible` (`backend/internal/ads/ads.go`), который расширяется до гейта по
-**origin-бенефиту, применимому в текущем контексте**, а не по одному глобальному флагу.
-
-## 11. Админ, аудит, отчётность
-
-**Неизменяемый журнал операций + материализованный баланс.** Журнал операций **только на
-INSERT** (никогда UPDATE/DELETE — полный аудит). Балансы сегментов `(account, source)` и
-бенефиты `(account, origin)` — быстрый **материализованный** кэш, обновляется **в той же
-транзакции**, что и запись журнала, и пересчитывается из журнала для сверки.
-
-**Награждение админом.** Админ начисляет **только конкретные ценности** (без рекламы /
-подсказки) — **никогда не Фишки** (подаренный баланс валюты = обход кассы стора). Админ
-**выбирает origin** при выдаче (ответственность за комплаенс на нём: `origin=vk`
-точечно/малый объём = низкий риск, `origin=direct` = безопасно). Грант — транзакция журнала
-типа `admin_grant`, цена 0 Фишек — полный аудит наград.
-
-**Финансовый отчёт по пользователю** в админке `/_gm` — балансы сегментов, платежи, траты,
-гранты, возвраты, полная история — расширение существующей карточки (`UserDetailView`,
-`handlers_admin_console.go`). Плюс экспорт журнала.
-
-## 12. Налоги и комплаенс
-
-Чеки формируются автоматически **на стороне провайдера** и отличаются по каналу:
-
-- **Robokassa** (direct) — чек НПД самозанятого при оплате.
-- **VK** — VK сам процессит Голоса через налоговую; делать нечего.
-- **TG Stars** — налоговой стороны нет (для РФ-самозанятого Stars легально невыводимы = не
-  доход НПД; принимаем, чек не формируем).
-
-**ОРД** (маркировка рекламы) по VK-рекламе — на стороне VK. (Не юридическая консультация —
-владелец сверяет точную схему НПД с налоговым консультантом.)
-
-## 13. Дистрибуция (native Android)
-
-- **RuStore** — Robokassa/внешний гейт разрешён (0%); native = чистый контекст `direct`.
-- **Google Play** — direct-покупки **скрыты**; «Кошелёк» показывает заглушку («установите
-  версию из RuStore для покупок»). Ролик за награду и трата уже накопленных Фишек работают.
-  Перед GP-релизом свериться с актуальными правилами Google по внутренней валюте.
-
-## 14. Модель данных (схема `payments`)
-
-Платёжный домен живёт в **своей схеме `payments`** в общем инстансе Postgres, со своим
-DB-ролём (права только на `payments`) и доменным пакетом за жёстким интерфейсом.
-Cross-schema внешние ключи к `backend.accounts` держат трату «Фишки↔бенефит» атомарной в
-одной транзакции. Сохранность — **PITR** (непрерывный WAL-архив), независимо от топологии
-базы.
-
-Основные таблицы (финальные имена/колонки — в `PLAN.md`):
-
-- **журнал операций (ledger)** — append-only операции: пополнение / трата / `admin_grant` /
-  возврат; `(провайдер, provider_payment_id)` уникален для защиты от повторов;
-  экспортопригоден.
-- **балансы** — материализованные `(account_id, source) → Фишки`.
-- **бенефиты** — материализованные `(account_id, origin)` → «без рекламы»
-  `paid_until`/`forever` + счётчик подсказок.
-- **каталог** — атомы + продукты (деактивируемые), цены per-метод, курсы покупки Фишек,
-  награда за ролик.
-- **заказы (orders)** — pending-покупки, `order_id`, ожидаемая сумма, origin, статус
-  (pending/paid/expired).
-- **payment_events** — succeeded/failed/refunded для диспетчера.
-
-Legacy `accounts.hint_balance` и `accounts.paid_account` **устаревают** и удаляются
-(expand-contract) в пользу сегментированной модели; ни то, ни другое в проде никогда не
-выставлялось (потока покупки не было), поэтому legacy-значения обнуляются.
-
-## 15. Словарь
-
-- **Фишка** — игровая валюта; единая единица, сегментирована по `source`.
-- **source (источник)** — где пополнены Фишки (`vk`/`telegram`/`direct`).
-- **origin (происхождение)** — где куплена ценность; определяет, где действует бенефит.
-- **ценность / бенефит** — то, что покупается за Фишки (без рекламы, подсказки, турнирный
-  взнос).
-- **гейт** — одностороннее правило комплаенса сторов (§4).
-- **журнал операций (ledger)** — неизменяемая запись всех операций с деньгами/ценностями.
-- **платёжный канал / рельса** — платёжный провайдер (Robokassa / Голоса VK / Stars TG).

docs/TESTING.md

@@ -20,18 +20,7 @@ tests or touching CI.
   derivation and the GCG share/copy/download choice, plus Playwright specs against the
   mock for the friends screen (code issue/redeem, accept a request), the lobby
   invitations section, the stats screen, profile editing, and the export chooser's
-  finished-only visibility + its signed-URL download flow (route-intercepted). The
-  **offline mode** spec (`e2e/offline.spec.ts`) plays a full device-local `vs_ai` game
-  end-to-end: it forces the installed-PWA display mode, enters offline through the
-  Settings toggle (whose readiness check fetches the enabled variants' dawgs), then creates
-  and plays a local game with a **pinned bag seed** (`window.__mock.setLocalSeed`, so the
-  rack is deterministic and the human can tap out a precomputed opening), asserting the
-  robot's real reply and the IndexedDB replay after a reload. A local game needs a real
-  dictionary, so the mock's `fetchDict` serves the per-variant dawgs from the preview
-  build's `/e2edict/`, copied in by `scripts/e2e-dict.mjs` from `E2E_DICT_DIR` — the `ui`
-  CI job fetches the `scrabble-dictionary` release like the Go jobs; locally it defaults to
-  the sibling `scrabble-solver/dawg`. These dawgs are never committed and never enter the
-  production build.
+  finished-only visibility + its signed-URL download flow (route-intercepted).
 - **Render sidecar** — `renderer/` (Node + skia-canvas executing the shared
   `ui/src/lib/gameimage.ts`) carries a `node --test` smoke: the committed fixture (a
   real self-played 35-move game) must rasterize to a plausible PNG

gateway/README.md

@@ -8,10 +8,6 @@ backend over REST/JSON, and bridges the backend's gRPC push stream to each
 client's in-app live channel. It **embeds the static UI build** (`go:embed`, baked
 in by the gateway image's node stage) and serves a **landing page** at `/` and the game
 **SPA** at `/app/` (web), `/telegram/` (the Telegram Mini App) and `/vk/` (the VK Mini App) — the single-origin model.
-The web SPA is an installable **PWA**: it serves `manifest.webmanifest` (unhashed from `ui/public/`,
-with the `.webmanifest` MIME type registered in-process — the distroless image has no
-`/etc/mime.types`) and the app-shell `sw.js` (built from `ui/src/sw.ts` by vite-plugin-pwa, which
-precaches the shell + assets so an installed PWA cold-launches offline).
 Hash-named `/assets/*` are served `immutable`; the HTML shells are `no-cache`. It can also serve the
 backend's admin console at `/_gm` behind HTTP Basic-Auth for a local non-caddy run;
 in the deployed contour the front caddy owns `/_gm` (see

gateway/internal/backendclient/api.go

@@ -42,15 +42,6 @@ type ProfileResp struct {
 	Email          string `json:"email"`
 	TelegramLinked bool   `json:"telegram_linked"`
 	VkLinked       bool   `json:"vk_linked"`
-	// DictVersions is the current dictionary version per game variant, forwarded verbatim
-	// into the Profile payload so an offline-capable client preloads the matching dawg.
-	DictVersions []DictVersion `json:"dict_versions,omitempty"`
-}
-
-// DictVersion pairs a game variant's stable label with its current dictionary version.
-type DictVersion struct {
-	Variant string `json:"variant"`
-	Version string `json:"version"`
 }
 
 // BannerResp is the advertising-banner block of an eligible viewer's profile: the
@@ -181,14 +172,13 @@ type AlphabetEntryJSON struct {
 // StateResp is a player's view of a game. Rack carries wire alphabet indices;
 // Alphabet is present only when the request asked for it.
 type StateResp struct {
-	Game                  GameResp            `json:"game"`
-	Seat                  int                 `json:"seat"`
-	Rack                  []int               `json:"rack"`
-	BagLen                int                 `json:"bag_len"`
-	HintsRemaining        int                 `json:"hints_remaining"`
-	WalletBalance         int                 `json:"wallet_balance"`
-	HintUnlockLeftSeconds int                 `json:"hint_unlock_left_seconds"`
-	Alphabet              []AlphabetEntryJSON `json:"alphabet,omitempty"`
+	Game           GameResp            `json:"game"`
+	Seat           int                 `json:"seat"`
+	Rack           []int               `json:"rack"`
+	BagLen         int                 `json:"bag_len"`
+	HintsRemaining int                 `json:"hints_remaining"`
+	WalletBalance  int                 `json:"wallet_balance"`
+	Alphabet       []AlphabetEntryJSON `json:"alphabet,omitempty"`
 }
 
 // MatchResp reports an auto-match outcome.
@@ -299,11 +289,10 @@ func (c *Client) GuestAuth(ctx context.Context, browserTz string) (SessionResp,
 
 // EmailRequest asks the backend to mail a login code, provisioning the account on
 // first contact; browserTz (the client's detected "±HH:MM" UTC offset) seeds the new
-// account's time zone, since the email account is created here, not at login. pwa marks a
-// request from an installed PWA, so the backend omits the one-tap confirm link from the email.
-func (c *Client) EmailRequest(ctx context.Context, email, browserTz, language string, pwa bool) error {
+// account's time zone, since the email account is created here, not at login.
+func (c *Client) EmailRequest(ctx context.Context, email, browserTz, language string) error {
 	return c.do(ctx, http.MethodPost, "/api/v1/internal/sessions/email/request", "", "",
-		map[string]any{"email": email, "browser_tz": browserTz, "language": language, "pwa": pwa}, nil)
+		map[string]string{"email": email, "browser_tz": browserTz, "language": language}, nil)
 }
 
 // EmailLogin verifies a login code and mints a session.

gateway/internal/connectsrv/metrics.go

@@ -46,13 +46,7 @@ func newServerMetrics(meter metric.Meter) *serverMetrics {
 	}
 	h, err := meter.Float64Histogram("edge_request_duration",
 		metric.WithUnit("s"),
-		metric.WithDescription("Seconds to serve one Connect Execute call, by message type and result."),
-		// Explicit second-scale buckets. The durations are recorded in seconds, so the SDK's
-		// default millisecond-calibrated boundaries (first boundary 5) would bin every sub-5s
-		// request into one bucket — making histogram_quantile(0.99) interpolate to ~4.95s
-		// regardless of the real latency, which flapped the >1s edge-latency alert. These
-		// boundaries straddle the 1s SLO so the p99 reflects real (mostly sub-second) latency.
-		metric.WithExplicitBucketBoundaries(0.005, 0.01, 0.025, 0.05, 0.1, 0.25, 0.5, 1, 2.5, 5, 10))
+		metric.WithDescription("Seconds to serve one Connect Execute call, by message type and result."))
 	if err != nil {
 		h, _ = noop.NewMeterProvider().Meter(meterName).Float64Histogram("edge_request_duration")
 	}

gateway/internal/connectsrv/metrics_test.go

@@ -29,7 +29,6 @@ func TestEdgeMetric(t *testing.T) {
 
 	type key struct{ messageType, result string }
 	counts := map[key]uint64{}
-	var bounds []float64
 	for _, sm := range rm.ScopeMetrics {
 		for _, md := range sm.Metrics {
 			if md.Name != "edge_request_duration" {
@@ -43,7 +42,6 @@ func TestEdgeMetric(t *testing.T) {
 				mt, _ := dp.Attributes.Value(attribute.Key("message_type"))
 				res, _ := dp.Attributes.Value(attribute.Key("result"))
 				counts[key{mt.AsString(), res.AsString()}] += dp.Count
-				bounds = dp.Bounds
 			}
 		}
 	}
@@ -53,19 +51,6 @@ func TestEdgeMetric(t *testing.T) {
 	if got := counts[key{"auth.guest", "domain"}]; got != 1 {
 		t.Errorf("edge auth.guest/domain = %d, want 1", got)
 	}
-	// The buckets must be second-scaled. The default (millisecond-calibrated) boundaries have no
-	// boundary between 0 and 5, so every sub-5s request bins into one bucket and p99 interpolates
-	// to ~4.95s, flapping the >1s alert. Require at least one sub-second boundary.
-	subSecond := false
-	for _, b := range bounds {
-		if b > 0 && b < 1 {
-			subSecond = true
-			break
-		}
-	}
-	if !subSecond {
-		t.Errorf("edge_request_duration bounds = %v, want sub-second boundaries (seconds-scaled)", bounds)
-	}
 }
 
 // TestRateLimitedMetric records limiter rejections through a manual reader and

gateway/internal/transcode/encode.go

@@ -95,7 +95,6 @@ func encodeProfile(p backendclient.ProfileResp) []byte {
 		banner = encodeBanner(b, *p.Banner)
 	}
 	prefs := buildStringVector(b, p.VariantPreferences, fb.ProfileStartVariantPreferencesVector)
-	dictVersions := encodeDictVersions(b, p.DictVersions)
 	fb.ProfileStart(b)
 	fb.ProfileAddUserId(b, uid)
 	fb.ProfileAddDisplayName(b, name)
@@ -112,9 +111,6 @@ func encodeProfile(p backendclient.ProfileResp) []byte {
 	fb.ProfileAddEmail(b, email)
 	fb.ProfileAddTelegramLinked(b, p.TelegramLinked)
 	fb.ProfileAddVkLinked(b, p.VkLinked)
-	if dictVersions != 0 {
-		fb.ProfileAddDictVersions(b, dictVersions)
-	}
 	if p.Banner != nil {
 		fb.ProfileAddBanner(b, banner)
 	}
@@ -122,31 +118,6 @@ func encodeProfile(p backendclient.ProfileResp) []byte {
 	return b.FinishedBytes()
 }
 
-// encodeDictVersions builds the Profile's dict_versions vector — one DictVersion table per
-// variant/version pair — and returns its offset, or 0 when there are none (the field is then
-// omitted). Every child table and its strings are created before the vector is opened, per the
-// FlatBuffers rule against nesting a table under one still being built; the caller invokes it
-// before ProfileStart for the same reason.
-func encodeDictVersions(b *flatbuffers.Builder, dvs []backendclient.DictVersion) flatbuffers.UOffsetT {
-	if len(dvs) == 0 {
-		return 0
-	}
-	offsets := make([]flatbuffers.UOffsetT, len(dvs))
-	for i, dv := range dvs {
-		variant := b.CreateString(dv.Variant)
-		version := b.CreateString(dv.Version)
-		fb.DictVersionStart(b)
-		fb.DictVersionAddVariant(b, variant)
-		fb.DictVersionAddVersion(b, version)
-		offsets[i] = fb.DictVersionEnd(b)
-	}
-	fb.ProfileStartDictVersionsVector(b, len(offsets))
-	for i := len(offsets) - 1; i >= 0; i-- {
-		b.PrependUOffsetT(offsets[i])
-	}
-	return b.EndVector(len(offsets))
-}
-
 // optString creates a FlatBuffers string for a non-empty value, or 0 to omit the
 // optional field (the client then reads it as absent).
 func optString(b *flatbuffers.Builder, s string) flatbuffers.UOffsetT {
@@ -299,14 +270,13 @@ func toWireState(s backendclient.StateResp) wire.StateView {
 		alphabet[i] = wire.AlphabetEntry{Index: e.Index, Letter: e.Letter, Value: e.Value}
 	}
 	return wire.StateView{
-		Game:                  toWireGame(s.Game),
-		Seat:                  s.Seat,
-		Rack:                  s.Rack,
-		BagLen:                s.BagLen,
-		HintsRemaining:        s.HintsRemaining,
-		WalletBalance:         s.WalletBalance,
-		HintUnlockLeftSeconds: s.HintUnlockLeftSeconds,
-		Alphabet:              alphabet,
+		Game:           toWireGame(s.Game),
+		Seat:           s.Seat,
+		Rack:           s.Rack,
+		BagLen:         s.BagLen,
+		HintsRemaining: s.HintsRemaining,
+		WalletBalance:  s.WalletBalance,
+		Alphabet:       alphabet,
 	}
 }
 

gateway/internal/transcode/transcode.go

@@ -253,7 +253,7 @@ func authGuestHandler(backend *backendclient.Client) Handler {
 func authEmailRequestHandler(backend *backendclient.Client) Handler {
 	return func(ctx context.Context, req Request) ([]byte, error) {
 		in := fb.GetRootAsEmailRequestRequest(req.Payload, 0)
-		if err := backend.EmailRequest(ctx, string(in.Email()), string(in.BrowserTz()), string(in.Language()), in.Pwa()); err != nil {
+		if err := backend.EmailRequest(ctx, string(in.Email()), string(in.BrowserTz()), string(in.Language())); err != nil {
 			return nil, err
 		}
 		return encodeAck(true), nil

gateway/internal/transcode/transcode_test.go

@@ -59,7 +59,7 @@ func TestGameStateRoundTripForwardsUserID(t *testing.T) {
 		if r.URL.Path != "/api/v1/user/games/g-1/state" {
 			t.Errorf("unexpected path %q", r.URL.Path)
 		}
-		_, _ = w.Write([]byte(`{"game":{"id":"g-1","variant":"scrabble_en","status":"active","players":2,"to_move":1,"seats":[{"seat":0,"account_id":"u-7","score":5}]},"seat":0,"rack":[0,1],"bag_len":80,"hints_remaining":4,"wallet_balance":3,"hint_unlock_left_seconds":1200}`))
+		_, _ = w.Write([]byte(`{"game":{"id":"g-1","variant":"scrabble_en","status":"active","players":2,"to_move":1,"seats":[{"seat":0,"account_id":"u-7","score":5}]},"seat":0,"rack":[0,1],"bag_len":80,"hints_remaining":4,"wallet_balance":3}`))
 	})
 	defer cleanup()
 
@@ -77,8 +77,8 @@ func TestGameStateRoundTripForwardsUserID(t *testing.T) {
 		t.Fatalf("handler: %v", err)
 	}
 	st := fb.GetRootAsStateView(payload, 0)
-	if st.BagLen() != 80 || st.RackLength() != 2 || st.HintsRemaining() != 4 || st.WalletBalance() != 3 || st.HintUnlockLeftSeconds() != 1200 {
-		t.Fatalf("state decoded wrong: bag=%d rack=%d hints=%d wallet=%d unlockLeft=%d", st.BagLen(), st.RackLength(), st.HintsRemaining(), st.WalletBalance(), st.HintUnlockLeftSeconds())
+	if st.BagLen() != 80 || st.RackLength() != 2 || st.HintsRemaining() != 4 || st.WalletBalance() != 3 {
+		t.Fatalf("state decoded wrong: bag=%d rack=%d hints=%d wallet=%d", st.BagLen(), st.RackLength(), st.HintsRemaining(), st.WalletBalance())
 	}
 	game := st.Game(nil)
 	if game == nil || string(game.Id()) != "g-1" || string(game.Variant()) != "scrabble_en" || game.ToMove() != 1 {

gateway/internal/webui/webui.go

@@ -17,7 +17,6 @@ package webui
 import (
 	"embed"
 	"io/fs"
-	"mime"
 	"net/http"
 	"path"
 	"strings"
@@ -36,25 +35,13 @@ func distFS() fs.FS {
 	return sub
 }
 
-// init registers the MIME type for .webmanifest, which Go's built-in table lacks and the
-// distroless runtime image has no /etc/mime.types to supply. Without it the PWA Web App Manifest
-// served under /app/ would be content-sniffed to text/plain, which some browsers reject.
-func init() {
-	_ = mime.AddExtensionType(".webmanifest", "application/manifest+json")
-}
-
-// Handler serves the compile-time embedded UI build over the public edge — the game SPA under
-// /app/, /telegram/ and /vk/. It delegates to handlerFor over the embedded dist/.
+// Handler serves the embedded UI. An existing file is served directly (hash-named assets get
+// an immutable cache); every other path falls back to indexName (the SPA shell) so a
+// client-side deep link still loads. When stripPrefix is non-empty it is removed from the
+// request path before lookup, so the same build serves under a sub-path (e.g. "/app/" or
+// "/telegram/").
 func Handler(stripPrefix, indexName string) http.Handler {
-	return handlerFor(distFS(), stripPrefix, indexName)
-}
-
-// handlerFor serves content as the UI: an existing file is served directly (hash-named assets get
-// an immutable cache); every other path falls back to indexName (the SPA shell) so a client-side
-// deep link still loads. When stripPrefix is non-empty it is removed from the request path before
-// lookup, so the same build serves under a sub-path (e.g. "/app/" or "/telegram/"). Split from
-// Handler so it can be exercised over an in-memory fs.FS in tests.
-func handlerFor(content fs.FS, stripPrefix, indexName string) http.Handler {
+	content := distFS()
 	files := http.FileServer(http.FS(content))
 	h := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		name := strings.TrimPrefix(path.Clean("/"+r.URL.Path), "/")
@@ -71,11 +58,6 @@ func handlerFor(content fs.FS, stripPrefix, indexName string) http.Handler {
 		// app (notably a relaunched Telegram Mini App) is a cache hit, not a re-download.
 		if strings.HasPrefix(name, "assets/") {
 			w.Header().Set("Cache-Control", "public, max-age=31536000, immutable")
-		} else if name == "sw.js" {
-			// The service worker must be revalidated on every load so a new deploy's worker (and its
-			// fresh precache manifest) is picked up promptly; a cached sw.js would strand clients on
-			// the old build. The worker's network-first navigation then serves the fresh shell online.
-			w.Header().Set("Cache-Control", "no-cache")
 		}
 		files.ServeHTTP(w, r)
 	})

gateway/internal/webui/webui_test.go

@@ -6,7 +6,6 @@ import (
 	"net/http/httptest"
 	"strings"
 	"testing"
-	"testing/fstest"
 )
 
 // get drives the handler with a GET for the given path and returns the response.
@@ -56,60 +55,3 @@ func TestAppMountServesShellStripsPrefixAndCachesAssets(t *testing.T) {
 		}
 	}
 }
-
-// testFS mirrors what Vite emits into dist/: the SPA shell, the PWA manifest + service worker at
-// the root (copied from ui/public), and a hash-named asset. The compile-time embedded dist/ holds
-// only a placeholder shell, so the manifest/sw.js serving is exercised over this in-memory FS.
-func testFS() fstest.MapFS {
-	return fstest.MapFS{
-		"index.html":           {Data: []byte("<!doctype html><title>shell</title>")},
-		"manifest.webmanifest": {Data: []byte(`{"name":"Эрудит"}`)},
-		"sw.js":                {Data: []byte("self.addEventListener('fetch', () => {});")},
-		"assets/app-abc123.js": {Data: []byte("export const x = 1;")},
-	}
-}
-
-// TestHandlerServesManifestWithManifestType: the PWA manifest is served with the manifest MIME
-// type (registered in init, since the distroless image has no /etc/mime.types), not sniffed to
-// text/plain, which some browsers reject.
-func TestHandlerServesManifestWithManifestType(t *testing.T) {
-	h := handlerFor(testFS(), "/app/", "index.html")
-	resp := get(t, h, "/app/manifest.webmanifest")
-	if resp.StatusCode != http.StatusOK {
-		t.Fatalf("status = %d, want 200", resp.StatusCode)
-	}
-	if ct := resp.Header.Get("Content-Type"); !strings.HasPrefix(ct, "application/manifest+json") {
-		t.Errorf("Content-Type = %q, want application/manifest+json", ct)
-	}
-}
-
-// TestHandlerServesServiceWorkerAsJavaScript: sw.js is served as JavaScript from the root, so its
-// registration (scope /app/) succeeds.
-func TestHandlerServesServiceWorkerAsJavaScript(t *testing.T) {
-	h := handlerFor(testFS(), "/app/", "index.html")
-	resp := get(t, h, "/app/sw.js")
-	if resp.StatusCode != http.StatusOK {
-		t.Fatalf("status = %d, want 200", resp.StatusCode)
-	}
-	if ct := resp.Header.Get("Content-Type"); !strings.HasPrefix(ct, "text/javascript") {
-		t.Errorf("Content-Type = %q, want text/javascript", ct)
-	}
-	// Revalidated on every load so a new deploy's worker (and its fresh precache) is picked up.
-	if cc := resp.Header.Get("Cache-Control"); cc != "no-cache" {
-		t.Errorf("sw.js Cache-Control = %q, want no-cache", cc)
-	}
-}
-
-// TestHandlerFallsBackToShellForUnknownManifestPath guards the trap: a manifest/sw path NOT emitted
-// into dist/ falls back to the SPA shell as text/html, on which SW registration would fail. The two
-// tests above pin that the real files are served instead of the shell.
-func TestHandlerFallsBackToShellForUnknownManifestPath(t *testing.T) {
-	h := handlerFor(testFS(), "/app/", "index.html")
-	resp := get(t, h, "/app/not-emitted.webmanifest")
-	if resp.StatusCode != http.StatusOK {
-		t.Fatalf("status = %d, want 200", resp.StatusCode)
-	}
-	if ct := resp.Header.Get("Content-Type"); !strings.HasPrefix(ct, "text/html") {
-		t.Errorf("Content-Type = %q, want text/html (SPA shell fallback)", ct)
-	}
-}

pkg/fbs/scrabble.fbs

@@ -138,11 +138,6 @@ table EmailRequestRequest {
   email:string;
   browser_tz:string;
   language:string;
-  // Set when the request originates from an installed PWA (standalone display mode): the
-  // backend then omits the one-tap confirm link from the login email so the code is typed in
-  // the same window, avoiding a link that opens in a separate browser (a different storage
-  // context) where the minted session could not reach the PWA.
-  pwa:bool;
 }
 
 // EmailLoginRequest logs in to the account owning email (provisioned at the
@@ -223,13 +218,6 @@ table BannerInfo {
 // suppresses out-of-app platform push, leaving only the in-app live stream. banner
 // carries the advertising-banner block for an eligible viewer, absent otherwise
 // (all added trailing — backward-compatible).
-// DictVersion is one variant's current dictionary version, carried on the profile so an offline
-// client learns it from an existing cold-start request (no extra call for a rarely-used feature).
-table DictVersion {
-  variant:string;
-  version:string;
-}
-
 table Profile {
   user_id:string;
   display_name:string;
@@ -252,10 +240,6 @@ table Profile {
   email:string;
   telegram_linked:bool;
   vk_linked:bool;
-  // dict_versions carries each variant's current dictionary version so an offline client can
-  // preload the right dictionary and pin a new local game without a separate request (added
-  // trailing — backward-compatible).
-  dict_versions:[DictVersion];
 }
 
 // BlockStatus reports the caller's current manual block. The UI fetches it after any operation
@@ -316,13 +300,6 @@ table StateView {
   // the wallet is a single global figure the client keeps live across games (added trailing —
   // backward-compatible).
   wallet_balance:int;
-  // hint_unlock_left_seconds is, for a vs_ai game, how many seconds until the idle hint unlocks
-  // (the robot's last move plus the idle window, computed from the SERVER clock online / the device
-  // clock offline, capped at the window and floored at 0); 0 for a human's first move (no robot move
-  // yet) or a non-vs_ai game. The client anchors a MONOTONIC countdown (performance.now()) to it, so a
-  // client clock change cannot skew it — see lib/hints. Seconds granularity is enough; sent trailing
-  // (additive, backward-compatible).
-  hint_unlock_left_seconds:int;
 }
 
 // GameActionRequest carries just a game id (pass / resign / hint / history).

pkg/fbs/scrabblefb/DictVersion.go

@@ -1,71 +0,0 @@
-// Code generated by the FlatBuffers compiler. DO NOT EDIT.
-
-package scrabblefb
-
-import (
-	flatbuffers "github.com/google/flatbuffers/go"
-)
-
-type DictVersion struct {
-	_tab flatbuffers.Table
-}
-
-func GetRootAsDictVersion(buf []byte, offset flatbuffers.UOffsetT) *DictVersion {
-	n := flatbuffers.GetUOffsetT(buf[offset:])
-	x := &DictVersion{}
-	x.Init(buf, n+offset)
-	return x
-}
-
-func FinishDictVersionBuffer(builder *flatbuffers.Builder, offset flatbuffers.UOffsetT) {
-	builder.Finish(offset)
-}
-
-func GetSizePrefixedRootAsDictVersion(buf []byte, offset flatbuffers.UOffsetT) *DictVersion {
-	n := flatbuffers.GetUOffsetT(buf[offset+flatbuffers.SizeUint32:])
-	x := &DictVersion{}
-	x.Init(buf, n+offset+flatbuffers.SizeUint32)
-	return x
-}
-
-func FinishSizePrefixedDictVersionBuffer(builder *flatbuffers.Builder, offset flatbuffers.UOffsetT) {
-	builder.FinishSizePrefixed(offset)
-}
-
-func (rcv *DictVersion) Init(buf []byte, i flatbuffers.UOffsetT) {
-	rcv._tab.Bytes = buf
-	rcv._tab.Pos = i
-}
-
-func (rcv *DictVersion) Table() flatbuffers.Table {
-	return rcv._tab
-}
-
-func (rcv *DictVersion) Variant() []byte {
-	o := flatbuffers.UOffsetT(rcv._tab.Offset(4))
-	if o != 0 {
-		return rcv._tab.ByteVector(o + rcv._tab.Pos)
-	}
-	return nil
-}
-
-func (rcv *DictVersion) Version() []byte {
-	o := flatbuffers.UOffsetT(rcv._tab.Offset(6))
-	if o != 0 {
-		return rcv._tab.ByteVector(o + rcv._tab.Pos)
-	}
-	return nil
-}
-
-func DictVersionStart(builder *flatbuffers.Builder) {
-	builder.StartObject(2)
-}
-func DictVersionAddVariant(builder *flatbuffers.Builder, variant flatbuffers.UOffsetT) {
-	builder.PrependUOffsetTSlot(0, flatbuffers.UOffsetT(variant), 0)
-}
-func DictVersionAddVersion(builder *flatbuffers.Builder, version flatbuffers.UOffsetT) {
-	builder.PrependUOffsetTSlot(1, flatbuffers.UOffsetT(version), 0)
-}
-func DictVersionEnd(builder *flatbuffers.Builder) flatbuffers.UOffsetT {
-	return builder.EndObject()
-}

pkg/fbs/scrabblefb/EmailRequestRequest.go

@@ -65,20 +65,8 @@ func (rcv *EmailRequestRequest) Language() []byte {
 	return nil
 }
 
-func (rcv *EmailRequestRequest) Pwa() bool {
-	o := flatbuffers.UOffsetT(rcv._tab.Offset(10))
-	if o != 0 {
-		return rcv._tab.GetBool(o + rcv._tab.Pos)
-	}
-	return false
-}
-
-func (rcv *EmailRequestRequest) MutatePwa(n bool) bool {
-	return rcv._tab.MutateBoolSlot(10, n)
-}
-
 func EmailRequestRequestStart(builder *flatbuffers.Builder) {
-	builder.StartObject(4)
+	builder.StartObject(3)
 }
 func EmailRequestRequestAddEmail(builder *flatbuffers.Builder, email flatbuffers.UOffsetT) {
 	builder.PrependUOffsetTSlot(0, flatbuffers.UOffsetT(email), 0)
@@ -89,9 +77,6 @@ func EmailRequestRequestAddBrowserTz(builder *flatbuffers.Builder, browserTz fla
 func EmailRequestRequestAddLanguage(builder *flatbuffers.Builder, language flatbuffers.UOffsetT) {
 	builder.PrependUOffsetTSlot(2, flatbuffers.UOffsetT(language), 0)
 }
-func EmailRequestRequestAddPwa(builder *flatbuffers.Builder, pwa bool) {
-	builder.PrependBoolSlot(3, pwa, false)
-}
 func EmailRequestRequestEnd(builder *flatbuffers.Builder) flatbuffers.UOffsetT {
 	return builder.EndObject()
 }

pkg/fbs/scrabblefb/Profile.go

@@ -211,28 +211,8 @@ func (rcv *Profile) MutateVkLinked(n bool) bool {
 	return rcv._tab.MutateBoolSlot(34, n)
 }
 
-func (rcv *Profile) DictVersions(obj *DictVersion, j int) bool {
-	o := flatbuffers.UOffsetT(rcv._tab.Offset(36))
-	if o != 0 {
-		x := rcv._tab.Vector(o)
-		x += flatbuffers.UOffsetT(j) * 4
-		x = rcv._tab.Indirect(x)
-		obj.Init(rcv._tab.Bytes, x)
-		return true
-	}
-	return false
-}
-
-func (rcv *Profile) DictVersionsLength() int {
-	o := flatbuffers.UOffsetT(rcv._tab.Offset(36))
-	if o != 0 {
-		return rcv._tab.VectorLen(o)
-	}
-	return 0
-}
-
 func ProfileStart(builder *flatbuffers.Builder) {
-	builder.StartObject(17)
+	builder.StartObject(16)
 }
 func ProfileAddUserId(builder *flatbuffers.Builder, userId flatbuffers.UOffsetT) {
 	builder.PrependUOffsetTSlot(0, flatbuffers.UOffsetT(userId), 0)
@@ -285,12 +265,6 @@ func ProfileAddTelegramLinked(builder *flatbuffers.Builder, telegramLinked bool)
 func ProfileAddVkLinked(builder *flatbuffers.Builder, vkLinked bool) {
 	builder.PrependBoolSlot(15, vkLinked, false)
 }
-func ProfileAddDictVersions(builder *flatbuffers.Builder, dictVersions flatbuffers.UOffsetT) {
-	builder.PrependUOffsetTSlot(16, flatbuffers.UOffsetT(dictVersions), 0)
-}
-func ProfileStartDictVersionsVector(builder *flatbuffers.Builder, numElems int) flatbuffers.UOffsetT {
-	return builder.StartVector(4, numElems, 4)
-}
 func ProfileEnd(builder *flatbuffers.Builder) flatbuffers.UOffsetT {
 	return builder.EndObject()
 }

pkg/fbs/scrabblefb/StateView.go

@@ -156,20 +156,8 @@ func (rcv *StateView) MutateWalletBalance(n int32) bool {
 	return rcv._tab.MutateInt32Slot(16, n)
 }
 
-func (rcv *StateView) HintUnlockLeftSeconds() int32 {
-	o := flatbuffers.UOffsetT(rcv._tab.Offset(18))
-	if o != 0 {
-		return rcv._tab.GetInt32(o + rcv._tab.Pos)
-	}
-	return 0
-}
-
-func (rcv *StateView) MutateHintUnlockLeftSeconds(n int32) bool {
-	return rcv._tab.MutateInt32Slot(18, n)
-}
-
 func StateViewStart(builder *flatbuffers.Builder) {
-	builder.StartObject(8)
+	builder.StartObject(7)
 }
 func StateViewAddGame(builder *flatbuffers.Builder, game flatbuffers.UOffsetT) {
 	builder.PrependUOffsetTSlot(0, flatbuffers.UOffsetT(game), 0)
@@ -198,9 +186,6 @@ func StateViewStartAlphabetVector(builder *flatbuffers.Builder, numElems int) fl
 func StateViewAddWalletBalance(builder *flatbuffers.Builder, walletBalance int32) {
 	builder.PrependInt32Slot(6, walletBalance, 0)
 }
-func StateViewAddHintUnlockLeftSeconds(builder *flatbuffers.Builder, hintUnlockLeftSeconds int32) {
-	builder.PrependInt32Slot(7, hintUnlockLeftSeconds, 0)
-}
 func StateViewEnd(builder *flatbuffers.Builder) flatbuffers.UOffsetT {
 	return builder.EndObject()
 }

pkg/wire/build.go

@@ -87,14 +87,13 @@ type AlphabetEntry struct {
 // (wire alphabet indices), bag size and hint budget. Alphabet is set only when the
 // recipient may not have cached the variant's display table yet.
 type StateView struct {
-	Game                  GameView
-	Seat                  int
-	Rack                  []int
-	BagLen                int
-	HintsRemaining        int
-	WalletBalance         int
-	HintUnlockLeftSeconds int
-	Alphabet              []AlphabetEntry
+	Game           GameView
+	Seat           int
+	Rack           []int
+	BagLen         int
+	HintsRemaining int
+	WalletBalance  int
+	Alphabet       []AlphabetEntry
 }
 
 // AccountRef is a referenced account with its display name resolved.
@@ -257,7 +256,6 @@ func BuildStateView(b *flatbuffers.Builder, s StateView) flatbuffers.UOffsetT {
 	fb.StateViewAddBagLen(b, int32(s.BagLen))
 	fb.StateViewAddHintsRemaining(b, int32(s.HintsRemaining))
 	fb.StateViewAddWalletBalance(b, int32(s.WalletBalance))
-	fb.StateViewAddHintUnlockLeftSeconds(b, int32(s.HintUnlockLeftSeconds))
 	if hasAlphabet {
 		fb.StateViewAddAlphabet(b, alphabet)
 	}

ui/e2e/hotseat.spec.ts

@@ -1,126 +0,0 @@
-import { test, expect, type Page } from './fixtures';
-
-// Offline pass-and-play (hotseat) is offered only in offline mode, which is gated to an installed
-// standalone PWA with a confirmed email. The mock account has an email; force standalone so the
-// Settings offline toggle shows.
-async function forceStandalone(page: Page): Promise<void> {
-  await page.addInitScript(() => {
-    const orig = window.matchMedia.bind(window);
-    window.matchMedia = (q: string) =>
-      (q.includes('display-mode: standalone')
-        ? { matches: true, media: q, onchange: null, addEventListener() {}, removeEventListener() {}, addListener() {}, removeListener() {}, dispatchEvent: () => false }
-        : orig(q)) as MediaQueryList;
-  });
-}
-
-async function enterLobby(page: Page): Promise<void> {
-  await page.getByRole('button', { name: /guest|гост/i }).first().click();
-  await expect(page.locator('button.tab').nth(2)).toBeVisible();
-}
-
-async function goOffline(page: Page): Promise<void> {
-  await page.locator('button.tab').nth(2).click(); // Settings
-  await page.getByRole('button', { name: /^(Offline|Оффлайн)$/ }).click();
-  await expect(page.locator('header.nav.offline')).toBeVisible({ timeout: 15000 });
-  await page.getByRole('button', { name: /Back|Назад/i }).click();
-  await expect(page.locator('button.tab').nth(2)).toBeVisible();
-}
-
-// typePin clicks the on-screen keypad digits (the pad has no OK button — the 4th digit is the action).
-// It first waits for the dots to be empty, so a call made right after a previous entry does not lose
-// digits during the 250 ms verdict pause (the 4th digit → pause → clear/advance).
-async function typePin(page: Page, digits: string): Promise<void> {
-  await expect(page.locator('.pad .dot.on')).toHaveCount(0);
-  for (const d of digits) await page.locator('.pad .key', { hasText: d }).click();
-}
-
-test.describe('offline hotseat (pass-and-play)', () => {
-  test('create with a locked seat, unlock, host-skip, terminate from the lobby', async ({ page }) => {
-    await forceStandalone(page);
-    await page.goto('/');
-    await enterLobby(page);
-    await goOffline(page);
-
-    // A known seed: the bag deals a full rack deterministically, AND the seeded seating shuffle keeps
-    // the roster order (Ann first) so the locked-seat assertions below are stable. (Seat order is
-    // randomised at start; the shuffle is seed-driven — seed '1' would seat Bob first, '2' Ann first.)
-    await page.evaluate(() => (window as unknown as { __mock: { setLocalSeed(s: string): void } }).__mock.setLocalSeed('2'));
-
-    // New game -> the offline mode selector now offers "with friends" (hotseat).
-    await page.locator('button.tab').nth(0).click();
-    await page.getByRole('button', { name: /With friends|друзьями/i }).click();
-
-    // The player rows are disabled until the mandatory host (master) PIN is set.
-    await expect(page.locator('.pname').first()).toBeDisabled();
-
-    // Set the host PIN (enter + confirm), then decline taking a seat.
-    await page.locator('.hostpin .plink').click();
-    await typePin(page, '9999');
-    await typePin(page, '9999');
-    await page.getByRole('button', { name: /^(No|Нет)$/ }).click();
-
-    // Pick the English variant (the plaques mirror Quick Match; "Scrabble" is the Latin English name).
-    await page.locator('.variant', { hasText: 'Scrabble' }).click();
-
-    // Two players: Ann (PIN-locked) and Bob (open).
-    await page.locator('.pname').nth(0).fill('Ann');
-    await page.locator('.pname').nth(1).fill('Bob');
-
-    // Row-delete: a 3rd player's kebab asks the host PIN, which ARMS a ❌ (not a silent delete);
-    // tapping the ❌ removes the row.
-    await page.getByRole('button', { name: /Add player|Добавить/i }).click();
-    await expect(page.locator('.prow')).toHaveCount(3);
-    await page.locator('.prow').nth(2).locator('.pkebab').click();
-    await typePin(page, '9999');
-    const rowDel = page.locator('.prow').nth(2).locator('.prow-del');
-    await expect(rowDel).toBeVisible();
-    await rowDel.click();
-    await expect(page.locator('.prow')).toHaveCount(2);
-
-    // Lock Ann's seat with a PIN.
-    await page.locator('.prow').nth(0).locator('.plink').click();
-    await typePin(page, '1234');
-    await typePin(page, '1234');
-
-    await page.locator('button.invite').click();
-    await expect(page.locator('[data-cell]').first()).toBeVisible();
-
-    // Ann is to move and PIN-locked: the board is visible but her rack is withheld behind Unlock.
-    await expect(page.locator('.unlock')).toBeVisible();
-    await expect(page.locator('.rack .tile')).toHaveCount(0);
-
-    // A wrong PIN keeps it locked; the right PIN reveals the full rack.
-    await page.locator('.unlock').click();
-    await typePin(page, '0000');
-    await expect(page.locator('.pad')).toBeVisible(); // still open after a wrong PIN
-    await typePin(page, '1234');
-    await expect(page.locator('.rack .tile')).toHaveCount(7);
-
-    // Opening the history reveals NO social controls on the seat plaques (a local game is
-    // account-less), and the Dictionary entry (the comms button) is kept for the active game.
-    await page.locator('.scoreboard').click();
-    await expect(page.locator('.fico')).toHaveCount(0);
-    await expect(page.locator('.chat-ico')).toBeVisible();
-    await page.locator('.scoreboard').click();
-
-    // Host override: 🔐 -> master PIN -> skip the current turn -> confirm. The turn passes to Bob,
-    // whose seat is open, so his rack shows without a lock.
-    await page.locator('button.tab', { hasText: /Host|Ведущий/ }).click();
-    await typePin(page, '9999');
-    await page.getByRole('button', { name: /Skip|Пропустить/ }).click();
-    await page.getByRole('button', { name: /^(OK|ОК)$/ }).click();
-    await expect(page.locator('.unlock')).toHaveCount(0);
-    await expect(page.locator('.rack .tile')).toHaveCount(7);
-
-    // Back in the lobby the active hotseat game has a kebab; terminating it needs the master PIN.
-    await page.getByRole('button', { name: /Back|Назад/i }).click();
-    await expect(page.getByText('Ann', { exact: false }).first()).toBeVisible();
-    await expect(page.locator('.rowwrap')).toHaveCount(1);
-    await page.locator('.kebab').first().click();
-    const del = page.locator('.rowwrap.revealed .del');
-    await expect(del).toBeVisible();
-    await del.click();
-    await typePin(page, '9999');
-    await expect(page.locator('.rowwrap')).toHaveCount(0);
-  });
-});

ui/e2e/install.spec.ts

@@ -1,59 +0,0 @@
-import { expect, test } from './fixtures';
-
-// The install CTA (components/InstallApp.svelte) is platform-adaptive: a one-tap button where the
-// browser offers a beforeinstallprompt (Chromium), a manual instructions modal on iOS Safari, and
-// nothing elsewhere / once installed / inside a Mini App. The native OS install dialog is
-// browser-level and not drivable from Playwright, so these assert the CTA's presence and branch.
-
-const IPHONE_SAFARI =
-  'Mozilla/5.0 (iPhone; CPU iPhone OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Mobile/15E148 Safari/604.1';
-
-test('web: a captured install prompt shows the one-tap CTA and clicking it prompts', async ({ page }) => {
-  await page.goto('/');
-  // The web login screen is shown (an ordinary browser tab, not a Mini App).
-  await expect(page.getByRole('button', { name: /guest/i })).toBeVisible();
-
-  // Hidden until the browser offers installation (Playwright never fires beforeinstallprompt).
-  await expect(page.getByRole('button', { name: /Install the app/i })).toHaveCount(0);
-
-  // Simulate Chromium offering the install: dispatch a beforeinstallprompt the app can capture.
-  await page.evaluate(() => {
-    const e = new Event('beforeinstallprompt') as Event & {
-      prompt?: () => Promise<void>;
-      userChoice?: Promise<unknown>;
-    };
-    (window as unknown as { __promptCalled: boolean }).__promptCalled = false;
-    e.prompt = () => {
-      (window as unknown as { __promptCalled: boolean }).__promptCalled = true;
-      return Promise.resolve();
-    };
-    e.userChoice = Promise.resolve({ outcome: 'accepted', platform: '' });
-    window.dispatchEvent(e);
-  });
-
-  const cta = page.getByRole('button', { name: /Install the app/i });
-  await expect(cta).toBeVisible();
-  await cta.click();
-  // Clicking calls the captured prompt (the native dialog itself is not observable here).
-  await expect
-    .poll(() => page.evaluate(() => (window as unknown as { __promptCalled: boolean }).__promptCalled))
-    .toBe(true);
-});
-
-test.describe('iOS Safari', () => {
-  test.use({ userAgent: IPHONE_SAFARI });
-
-  test('shows manual Add-to-Home-Screen instructions (no programmatic install)', async ({ page }) => {
-    await page.goto('/');
-    await expect(page.getByRole('button', { name: /guest/i })).toBeVisible();
-
-    // On iOS Safari the CTA shows at once (no beforeinstallprompt is ever fired there).
-    const cta = page.getByRole('button', { name: /Install the app/i });
-    await expect(cta).toBeVisible();
-    await cta.click();
-
-    // It opens the app's own instructions modal (not a native / Telegram popup).
-    await expect(page.getByRole('heading', { name: 'Add to Home Screen' })).toBeVisible();
-    await expect(page.getByText(/Tap the Share button/)).toBeVisible();
-  });
-});

ui/e2e/landing.spec.ts

@@ -46,15 +46,3 @@ test('the landing is a normal scrolling document (the SPA document-pin does not
   expect(state.shell).toBe(false);
   expect(state.bodyPosition).not.toBe('fixed');
 });
-
-// The web-version entry (/app/) is always present, alongside the build-var-gated Telegram/VK ones
-// (absent here, since e2e sets no VITE_* vars), each with a caption.
-test('the landing shows a web-version entry linking /app/, with a caption', async ({ page }) => {
-  await page.goto('/landing.html');
-  await expect(page.getByText(/Играй в «Эрудита»/)).toBeVisible(); // Russian by default
-
-  const web = page.getByRole('link', { name: 'Играть в браузере' });
-  await expect(web).toBeVisible();
-  expect(await web.getAttribute('href')).toContain('/app/');
-  await expect(page.getByText('Веб-версия')).toBeVisible();
-});

ui/e2e/offline.spec.ts

@@ -1,95 +0,0 @@
-import { test, expect, type Page } from './fixtures';
-
-// The offline mode is gated to an installed standalone PWA with a confirmed email. The mock account
-// has an email; force the standalone display mode so the Settings offline toggle is offered. Only the
-// `(display-mode: standalone)` query is overridden — theme/reduce-motion queries pass through.
-async function forceStandalone(page: Page): Promise<void> {
-  await page.addInitScript(() => {
-    const orig = window.matchMedia.bind(window);
-    window.matchMedia = (q: string) =>
-      (q.includes('display-mode: standalone')
-        ? { matches: true, media: q, onchange: null, addEventListener() {}, removeEventListener() {}, addListener() {}, removeListener() {}, dispatchEvent: () => false }
-        : orig(q)) as MediaQueryList;
-  });
-}
-
-// After a load, land in the lobby. The mock cold-starts on the login screen (no seeded session), so
-// click through as guest. Waiting for the button (rather than a point-in-time count()) is what makes
-// this deterministic: a count() sampled during the pre-login splash frame returned 0, skipped the
-// click, and then hung — or latched a transient lobby tab-bar — instead of opening the real lobby.
-async function enterLobby(page: Page): Promise<void> {
-  await page.getByRole('button', { name: /guest|гост/i }).first().click();
-  // The lobby tab bar has three tabs in a fixed order: New (0), Stats (1), Settings (2). nth() is
-  // robust to locale, emoji variation selectors and the coachmark anchors (which the first-run
-  // onboarding strips after it completes).
-  await expect(page.locator('button.tab').nth(2)).toBeVisible();
-}
-
-// Pick a rack tile by its glyph and drop it on a board square (the rack of the pinned-seed game has
-// all-distinct letters, so the glyph is unambiguous).
-async function placeTile(page: Page, glyph: string, row: number, col: number): Promise<void> {
-  await page.locator('.rack .tile', { hasText: glyph }).first().click();
-  await page.locator(`[data-cell][data-row="${row}"][data-col="${col}"]`).click();
-}
-
-test.describe('offline mode', () => {
-  test('enter via the toggle, play a local vs_ai game, persist across a reload', async ({ page }) => {
-    await forceStandalone(page);
-    await page.goto('/');
-    await enterLobby(page);
-
-    // Online: a seeded online game (vs Ann) is listed.
-    await expect(page.getByText('Ann', { exact: false }).first()).toBeVisible();
-
-    // Enter offline through the real Settings toggle (its readiness check fetches every enabled
-    // variant's dawg, served from /e2edict/ by the mock) — the header turns blue with the chip.
-    await page.locator('button.tab').nth(2).click();
-    await page.getByRole('button', { name: /^(Offline|Оффлайн)$/ }).click();
-    await expect(page.locator('header.nav.offline')).toBeVisible({ timeout: 15000 });
-
-    // Back in the (now offline) lobby: the online games are hidden and the Stats tab is disabled.
-    await page.getByRole('button', { name: /Back|Назад/i }).click();
-    await expect(page.locator('button.tab').nth(2)).toBeVisible();
-    await expect(page.getByText('Ann', { exact: false })).toHaveCount(0);
-    await expect(page.locator('button.tab').nth(1)).toBeDisabled();
-
-    // Create a device-local English vs_ai game with a pinned bag seed (deals the rack NEWYMAO).
-    await page.evaluate(() => (window as unknown as { __mock: { setLocalSeed(s: string): void } }).__mock.setLocalSeed('1'));
-    await page.locator('button.tab').nth(0).click();
-    // The English variant's display name is "Scrabble" (Latin) in both locales — the Russian
-    // variants are "Скрэббл"/"Эрудит"/"Erudite", so this uniquely selects the English game.
-    await page.locator('.variant', { hasText: 'Scrabble' }).click();
-    await page.locator('button.invite').click();
-    await expect(page.locator('[data-cell]').first()).toBeVisible();
-
-    // The human's first move is not idle-gated: the hint is available at once (no 🔒 lock badge).
-    await expect(page.locator('.lock')).toHaveCount(0);
-
-    // The human plays WAY horizontally across the centre (7,5)-(7,7).
-    await placeTile(page, 'W', 7, 5);
-    await placeTile(page, 'A', 7, 6);
-    await placeTile(page, 'Y', 7, 7);
-    await expect(page.locator('[data-cell].pending')).toHaveCount(3);
-    await page.locator('.make').click();
-
-    // The play commits and the local robot replies with a real move, so the board carries more than
-    // WAY's three tiles.
-    await expect(async () => {
-      expect(await page.locator('[data-cell].filled').count()).toBeGreaterThan(3);
-    }).toPass({ timeout: 15000 });
-    const filled = await page.locator('[data-cell].filled').count();
-
-    // Now it is the human's turn again after the robot moved: the idle hint gate arms, so the hint
-    // button shows the 🔒 lock (it lifts after 30 idle minutes on a monotonic clock — not waited here).
-    await expect(page.locator('.lock')).toBeVisible();
-
-    // Reload: the hash router restores the /game/<id> route and the local game replays from
-    // IndexedDB with every committed tile intact.
-    await page.reload();
-    await expect(page.locator('[data-cell]').first()).toBeVisible();
-    await expect(page.locator('[data-cell].filled')).toHaveCount(filled);
-    // The idle-hint gate is persisted (a wall-clock unlock time), so the 🔒 survives the reload —
-    // the wait was not reset by relaunching.
-    await expect(page.locator('.lock')).toBeVisible();
-  });
-});

ui/e2e/router.spec.ts

@@ -1,26 +0,0 @@
-import { expect, test } from './fixtures';
-
-// The hash router must update its reactive `route` rune synchronously inside navigate(), not defer it
-// to the asynchronous `hashchange` event. Bootstrap flips `app.ready` in the same tick right after
-// `navigate('/login')` on an unauthenticated cold start; a route that trailed the hash for one frame
-// let App.svelte render the stale route (the empty-hash lobby) under the new login screen — a visible
-// lobby-shell flash plus a doomed games.list. It also made the offline e2e flaky: enterLobby could
-// latch that transient lobby tab-bar instead of clicking through the login screen.
-
-test('navigate updates the reactive route synchronously (no hashchange lag)', async ({ page }) => {
-  await page.goto('/');
-  // The bundle has loaded and installed the mock __router seam once the login screen is up.
-  await expect(page.getByRole('button', { name: /guest/i })).toBeVisible();
-
-  // Read the route in the SAME microtask as the navigate: the fix makes it the new route at once;
-  // the pre-fix code returned the previous route (it waited for the async hashchange).
-  const routeAfterNavigate = await page.evaluate(() => {
-    const r = (window as unknown as { __router: { navigate(p: string): void; route(): string } }).__router;
-    r.navigate('/settings');
-    return r.route();
-  });
-  expect(routeAfterNavigate).toBe('settings');
-
-  // The hash was written too, so a reload/back still resolves the same route.
-  expect(new URL(page.url()).hash).toBe('#/settings');
-});

ui/e2e/viewport.spec.ts

@@ -1,69 +0,0 @@
-import { test, expect, type Page } from './fixtures';
-
-// Playwright's WebKit has no real soft keyboard, so emulate iOS's visual-viewport behaviour: replace
-// window.visualViewport with a controllable fake BEFORE the app boots. The app's syncViewport
-// (app.svelte.ts) reads visualViewport.height/offsetTop and mirrors them into --vvh / --vv-top, which
-// position the pinned app-shell (app.css html.app-shell body). Driving the fake exercises the exact
-// code path the real keyboard triggers on iOS — where the layout viewport does NOT shrink and the
-// visual viewport instead offsets down toward the focused field.
-async function installFakeViewport(page: Page): Promise<void> {
-  await page.addInitScript(() => {
-    const fake = new EventTarget() as EventTarget & { height: number; offsetTop: number; width: number };
-    fake.height = window.innerHeight;
-    fake.offsetTop = 0;
-    fake.width = window.innerWidth;
-    Object.defineProperty(window, 'visualViewport', { configurable: true, value: fake });
-    (window as unknown as { __vv: typeof fake }).__vv = fake;
-  });
-}
-
-async function setViewport(page: Page, height: number, offsetTop: number): Promise<void> {
-  await page.evaluate(
-    ([h, t]) => {
-      const vv = (window as unknown as { __vv: { height: number; offsetTop: number; dispatchEvent(e: Event): boolean } }).__vv;
-      vv.height = h;
-      vv.offsetTop = t;
-      vv.dispatchEvent(new Event('resize'));
-      vv.dispatchEvent(new Event('scroll'));
-    },
-    [height, offsetTop],
-  );
-}
-
-async function shell(page: Page): Promise<{ vvh: string; top: string; bodyTop: string }> {
-  return page.evaluate(() => ({
-    vvh: getComputedStyle(document.documentElement).getPropertyValue('--vvh').trim(),
-    top: getComputedStyle(document.documentElement).getPropertyValue('--vv-top').trim(),
-    bodyTop: getComputedStyle(document.body).top,
-  }));
-}
-
-test.describe('visual-viewport shell (soft-keyboard alignment)', () => {
-  test('the pinned shell follows the visual viewport height AND offset', async ({ page }) => {
-    await installFakeViewport(page);
-    await page.goto('/');
-    await expect(page.locator('html.app-shell')).toBeAttached();
-    const innerH = await page.evaluate(() => window.innerHeight);
-
-    // Keyboard closed: full height, no offset.
-    await setViewport(page, innerH, 0);
-    let s = await shell(page);
-    expect(s.top).toBe('0px');
-    expect(s.bodyTop).toBe('0px');
-
-    // Keyboard open + iOS offset: the visual viewport shrinks AND offsets down. The pinned shell must
-    // follow BOTH — the body's top must equal the offset (not stay at 0), else the top-anchored
-    // content shows empty space below (the iOS bug this fixes).
-    await setViewport(page, innerH - 300, 180);
-    s = await shell(page);
-    expect(s.vvh).toBe(`${innerH - 300}px`);
-    expect(s.top).toBe('180px');
-    expect(s.bodyTop).toBe('180px');
-
-    // Keyboard closed again: the offset reverts to 0 — no stale shift left behind.
-    await setViewport(page, innerH, 0);
-    s = await shell(page);
-    expect(s.top).toBe('0px');
-    expect(s.bodyTop).toBe('0px');
-  });
-});

ui/index.html

@@ -256,18 +256,6 @@
     <link rel="icon" href="favicon.ico" sizes="32x32" />
     <link rel="icon" type="image/svg+xml" href="favicon.svg" />
     <link rel="apple-touch-icon" href="apple-touch-icon.png" />
-    <!-- PWA installability (web /app/ only): the manifest + a service worker (registered from
-         lib/pwa, web-only) let the app be added to the home screen / desktop. The relative href
-         resolves per serving path; these tags are inert inside the Telegram/VK Mini App webviews,
-         which manage their own chrome. theme-color mirrors the light/dark --bg tokens (app.css). -->
-    <link rel="manifest" href="manifest.webmanifest" />
-    <meta name="theme-color" content="#f3f4f6" media="(prefers-color-scheme: light)" />
-    <meta name="theme-color" content="#0f1115" media="(prefers-color-scheme: dark)" />
-    <meta name="mobile-web-app-capable" content="yes" />
-    <meta name="apple-mobile-web-app-capable" content="yes" />
-    <meta name="apple-mobile-web-app-status-bar-style" content="default" />
-    <meta name="apple-mobile-web-app-title" content="Эрудит" />
-    <meta name="application-name" content="Эрудит" />
   </head>
   <body>
     <div id="app"></div>

ui/package.json

@@ -32,10 +32,6 @@
     "svelte-check": "^4.1.0",
     "typescript": "^5.7.0",
     "vite": "^6.0.0",
-    "vite-plugin-pwa": "^0.21.2",
-    "vitest": "^3.0.0",
-    "workbox-core": "^7.4.1",
-    "workbox-precaching": "^7.4.1",
-    "workbox-routing": "^7.4.1"
+    "vitest": "^3.0.0"
   }
 }

ui/playwright.config.ts

@@ -21,11 +21,8 @@ export default defineConfig({
     // under /app/ and /telegram/): served from the preview root, an absolute base keeps assets at
     // /assets/ so the SPA-fallback also boots a subpath like /telegram/. Base only prefixes asset
     // URLs, so the minified JS under test is identical to the contour's.
-    // After the mock build, copy the real per-variant dawgs into the preview output (dist-e2e) so the
-    // offline spec can play a real local vs_ai game; the files are e2e-only (never committed, never in
-    // the production build). Source: E2E_DICT_DIR (CI: the fetched release; local: the sibling).
     command:
-      'pnpm exec vite build --mode mock --base / --outDir dist-e2e --emptyOutDir && node scripts/e2e-dict.mjs && pnpm exec vite preview --outDir dist-e2e --port 4173 --strictPort',
+      'pnpm exec vite build --mode mock --base / --outDir dist-e2e --emptyOutDir && pnpm exec vite preview --outDir dist-e2e --port 4173 --strictPort',
     url: 'http://localhost:4173',
     reuseExistingServer: !process.env.CI,
     timeout: 120_000,

ui/public/manifest.webmanifest

@@ -1,17 +0,0 @@
-{
-  "name": "Эрудит (Скрэббл)",
-  "short_name": "Эрудит",
-  "description": "Игра в слова «Эрудит» (Скрэббл): играйте с друзьями, случайным соперником или ИИ-роботом.",
-  "lang": "ru",
-  "dir": "ltr",
-  "start_url": ".",
-  "scope": ".",
-  "display": "standalone",
-  "background_color": "#f3f4f6",
-  "theme_color": "#f3f4f6",
-  "icons": [
-    { "src": "icon-192.png", "sizes": "192x192", "type": "image/png", "purpose": "any" },
-    { "src": "icon-512.png", "sizes": "512x512", "type": "image/png", "purpose": "any" },
-    { "src": "icon-maskable-512.png", "sizes": "512x512", "type": "image/png", "purpose": "maskable" }
-  ]
-}

ui/scripts/bundle-size.mjs

@@ -19,17 +19,10 @@ import { join } from 'node:path';
 
 const DIST = 'dist';
 
-// Per-chunk gzip budgets in KB. The app entry was raised to 110 for the local move-preview
-// wiring, to 112 for the PWA install feature, to 113 for the offline-mode wiring, to 114 for
-// the offline auto-detect (the cold-start reachability check and the "no connection" dialog live in
-// the boot path), then to 115 for the vs_ai idle-hint gate — its monotonic clock, lock badge and
-// countdown toast live in the always-loaded game screen (Game.svelte) — and to 120 for the offline
-// pass-and-play (hotseat) mode: the on-screen PIN pad, the creation roster and the in-game host menu
-// live in the always-loaded New Game / Game / Lobby screens (the offline engine and the tiny PIN
-// hashing stay in lazy chunks / are negligible). The heavy parts — the dict loader, the move
-// generator and the preload orchestration — still stay in lazy chunks. Scoped CSS lands in the CSS
-// chunk, not this JS budget.
-const BUDGET = { app: 120, shared: 30, landing: 5 };
+// Per-chunk gzip budgets in KB. The app entry was raised to 110 when the local
+// move-preview wiring landed (the heavy dict subsystem stays in lazy chunks; this
+// covers the small in-entry game/debug wiring it needs).
+const BUDGET = { app: 110, shared: 30, landing: 5 };
 
 // gzipped returns the gzipped byte size of a built asset, or 0 when the reference is not a
 // local file (e.g. the Telegram SDK loaded from a CDN) or is missing.

ui/scripts/e2e-dict.mjs

@@ -1,35 +0,0 @@
-// Copies the real per-variant dictionary DAWGs into the mock e2e preview output (dist-e2e/e2edict/)
-// so the offline spec can create and play a real local vs_ai game (the mock's fetchDict serves these
-// files — see lib/mock/client.ts). The dawgs are NEVER committed and never enter the production
-// build; they live only in the throwaway dist-e2e/ that `vite preview` serves for Playwright.
-//
-// Source directory: E2E_DICT_DIR — in CI the fetched scrabble-dictionary release
-// ($GITHUB_WORKSPACE/dawg); locally it defaults to the sibling scrabble-solver/dawg checkout. A
-// missing source only warns (so the other, dawg-free specs still run); the offline spec then fails
-// with an obvious HTTP 404 from fetchDict.
-
-import { existsSync, mkdirSync, copyFileSync } from 'node:fs';
-import { join } from 'node:path';
-
-const srcDir = process.env.E2E_DICT_DIR ?? '../../scrabble-solver/dawg';
-const outDir = 'dist-e2e/e2edict';
-
-// The app's Variant enum value -> the release dawg file name (matches the movegen/parity mapping).
-const dawgFor = {
-  scrabble_en: 'en_sowpods',
-  scrabble_ru: 'ru_scrabble',
-  erudit_ru: 'ru_erudit',
-};
-
-mkdirSync(outDir, { recursive: true });
-let copied = 0;
-for (const [variant, file] of Object.entries(dawgFor)) {
-  const src = join(srcDir, `${file}.dawg`);
-  if (!existsSync(src)) {
-    console.warn(`e2e-dict: missing ${src} — the offline spec will 404 (set E2E_DICT_DIR)`);
-    continue;
-  }
-  copyFileSync(src, join(outDir, `${variant}.dawg`));
-  copied++;
-}
-console.log(`e2e-dict: copied ${copied}/${Object.keys(dawgFor).length} dawgs from ${srcDir} -> ${outDir}`);

ui/src/App.svelte

@@ -1,7 +1,7 @@
 <script lang="ts">
   import { onMount } from 'svelte';
   import { cubicOut } from 'svelte/easing';
-  import { app, bootstrap, resolveOfflinePrompt } from './lib/app.svelte';
+  import { app, bootstrap } from './lib/app.svelte';
   import { router, type RouteName } from './lib/router.svelte';
   import { t } from './lib/i18n/index.svelte';
   import Toast from './components/Toast.svelte';
@@ -136,21 +136,6 @@
 <Coachmark />
 <MaintenanceOverlay />
 
-<!-- Cold-start "no connection" dialog: the reachability check timed out with the network interface
-     reportedly online, so it is ambiguous. The player chooses to go offline (play local vs_ai) or to
-     keep trying to connect. bootstrap awaits this choice (app.offlinePrompt). -->
-{#if app.offlinePrompt}
-  <div class="offprompt" role="dialog" aria-modal="true">
-    <div class="card">
-      <p class="msg">{t('offline.promptTitle')}</p>
-      <div class="acts">
-        <button class="opt primary" onclick={() => resolveOfflinePrompt(true)}>{t('offline.promptYes')}</button>
-        <button class="opt" onclick={() => resolveOfflinePrompt(false)}>{t('offline.promptNo')}</button>
-      </div>
-    </div>
-  </div>
-{/if}
-
 {#if routeIsLobby && !app.splashDone && !app.blocked && !app.bootError && !app.launchError}
   <Splash />
 {/if}
@@ -160,49 +145,6 @@
 {/if}
 
 <style>
-  /* The cold-start "no connection" dialog — a centred card over a scrim, above the splash. */
-  .offprompt {
-    position: fixed;
-    inset: 0;
-    z-index: 100;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    background: rgba(0, 0, 0, 0.5);
-    padding: var(--pad);
-  }
-  .offprompt .card {
-    background: var(--bg-elev);
-    border: 1px solid var(--border);
-    border-radius: var(--radius-sm);
-    padding: 20px;
-    max-width: 320px;
-    width: 100%;
-    text-align: center;
-  }
-  .offprompt .msg {
-    margin: 0 0 16px;
-    font-size: 1rem;
-    color: var(--text);
-  }
-  .offprompt .acts {
-    display: flex;
-    flex-direction: column;
-    gap: 8px;
-  }
-  .offprompt .opt {
-    padding: 11px 16px;
-    border: 1px solid var(--border);
-    border-radius: var(--radius-sm);
-    background: var(--surface);
-    color: var(--text);
-    font-size: 0.95rem;
-  }
-  .offprompt .opt.primary {
-    background: var(--accent);
-    color: var(--accent-text);
-    border-color: var(--accent);
-  }
   .splash {
     height: 100%;
     display: grid;

ui/src/Landing.svelte

@@ -80,26 +80,20 @@
   <section class="hero">
     <h1>{about.title}</h1>
     <p class="tagline">{t('landing.tagline')}</p>
-    <!-- Platform entries: Telegram/VK are gated by their build vars; the web version (/app/) is
-         always available. A caption under each clarifies what it opens. -->
-    <div class="entries">
-      {#if tgLink}
-        <a class="entry" href={tgLink} target="_blank" rel="noopener noreferrer" aria-label={t('landing.playTelegram')}>
-          <img src="telegram-logo.svg" alt="" width="64" height="64" />
-          <span class="caption">{t('landing.captionTelegram')}</span>
-        </a>
-      {/if}
-      {#if vkLink}
-        <a class="entry" href={vkLink} target="_blank" rel="noopener noreferrer" aria-label={t('landing.playVK')}>
-          <img src="vk-logo.svg" alt="" width="64" height="64" />
-          <span class="caption">{t('landing.captionVK')}</span>
-        </a>
-      {/if}
-      <a class="entry" href="/app/" aria-label={t('landing.playWeb')}>
-        <img src="favicon.svg" alt="" width="64" height="64" />
-        <span class="caption">{t('landing.captionWeb')}</span>
-      </a>
-    </div>
+    {#if tgLink || vkLink}
+      <div class="entries">
+        {#if tgLink}
+          <a class="entry" href={tgLink} target="_blank" rel="noopener noreferrer" aria-label={t('landing.playTelegram')}>
+            <img src="telegram-logo.svg" alt="" width="64" height="64" />
+          </a>
+        {/if}
+        {#if vkLink}
+          <a class="entry" href={vkLink} target="_blank" rel="noopener noreferrer" aria-label={t('landing.playVK')}>
+            <img src="vk-logo.svg" alt="" width="64" height="64" />
+          </a>
+        {/if}
+      </div>
+    {/if}
   </section>
 
   <section class="info">
@@ -213,8 +207,8 @@
     color: var(--text-muted);
     font-size: 1.05rem;
   }
-  /* The platform entries are the bigger logos in a row, each with a short caption below; the
-     link keeps an aria-label for assistive tech. */
+  /* The platform entries are just the bigger logos in a row (no button chrome, no captions);
+     each link keeps an aria-label for assistive tech. */
   .entries {
     align-self: center;
     display: flex;
@@ -223,11 +217,6 @@
   }
   .entry {
     display: inline-flex;
-    flex-direction: column;
-    align-items: center;
-    gap: 8px;
-    text-decoration: none;
-    color: var(--text);
   }
   .entry img {
     display: block;
@@ -236,10 +225,6 @@
   .entry:hover img {
     transform: scale(1.06);
   }
-  .caption {
-    font-size: 0.9rem;
-    color: var(--text-muted);
-  }
   .info {
     background: var(--surface-2);
     border-radius: var(--radius-sm);

ui/src/app.css

@@ -162,15 +162,7 @@ html.app-shell {
 }
 html.app-shell body {
   position: fixed;
-  /* Follow the visual viewport (top + height), not merely fill the layout viewport: iOS Safari /
-     WKWebView does not shrink the layout viewport for the soft keyboard — it offsets the visual
-     viewport down toward the focused field — so a top-anchored (inset:0) shell would misalign, showing
-     empty space below the content (worst on a repeat focus). --vv-top / --vvh are kept in sync from
-     app.svelte.ts (syncViewport). The fallbacks equal inset:0 before the first sync / on the landing. */
-  top: var(--vv-top, 0px);
-  left: 0;
-  right: 0;
-  height: var(--vvh, 100%);
+  inset: 0;
   overflow: hidden;
 }
 

ui/src/components/Header.svelte

@@ -1,7 +1,6 @@
 <script lang="ts">
   import { navigate } from '../lib/router.svelte';
   import { connection } from '../lib/connection.svelte';
-  import { offlineMode, dictPreloadWarning } from '../lib/offline.svelte';
   import { t } from '../lib/i18n/index.svelte';
   import { app, openDebug } from '../lib/app.svelte';
   import Spinner from './Spinner.svelte';
@@ -28,7 +27,7 @@
   }
 </script>
 
-<header class="nav" class:grow class:offline={offlineMode.active}>
+<header class="nav" class:grow>
   <div class="bar">
     {#if showBack}
       <button class="icon back" onclick={() => back && navigate(back)} aria-label="Back">
@@ -37,20 +36,15 @@
     {:else}
       <span class="spacer"></span>
     {/if}
-    {#if connection.online || offlineMode.active}
+    {#if connection.online}
       <!-- svelte-ignore a11y_click_events_have_key_events -->
       <!-- svelte-ignore a11y_no_noninteractive_element_interactions -->
       <h1 onclick={onTitleTap}>{title}</h1>
     {:else}
       <h1 class="connecting"><Spinner /> <span>{t('connection.connecting')}</span></h1>
     {/if}
-    <!-- A right-hand spacer balances the back button so the title stays centred; in offline mode it
-         carries the "Offline" chip so the deliberate mode is always visible (not just the blue tint). -->
-    {#if offlineMode.active}
-      <span class="chip">{t('settings.offline')}</span>
-    {:else}
-      <span class="spacer"></span>
-    {/if}
+    <!-- A right-hand spacer balances the back button so the title stays centred. -->
+    <span class="spacer"></span>
   </div>
   <!-- The ad banner lives inside the nav, directly under the title bar, so it sits in the
        same place on every screen — and in the game (grown nav) the spare height falls below
@@ -58,11 +52,7 @@
        coachmark overlay is up (app.coachActive) so the scrolling strip does not run behind the
        dimmed onboarding layer; the engine keeps rotating (module scope) and the strip reappears,
        per this same condition, once onboarding closes. -->
-  {#if dictPreloadWarning.active}
-    <!-- A background dictionary preload for offline readiness failed (poor connection): a soft
-         notice takes the ad banner's slot until a later preload succeeds and clears it. -->
-    <p class="preload-warn" role="alert">{t('offline.preloadWarning')}</p>
-  {:else if app.profile?.banner && app.profile.banner.campaigns.length && !app.coachActive}
+  {#if app.profile?.banner && app.profile.banner.campaigns.length && !app.coachActive}
     <AdBanner
       campaigns={app.profile.banner.campaigns}
       timings={app.profile.banner.timings}
@@ -84,12 +74,6 @@
     user-select: none;
     -webkit-user-select: none;
   }
-  /* Deliberate offline mode: a blue-tinted nav, mixed from the accent so it tracks the light/dark
-     theme (and any Telegram theme override) — the offline state is unmistakable at a glance. */
-  .nav.offline {
-    background: color-mix(in srgb, var(--accent) 20%, var(--bg-elev));
-    border-bottom-color: color-mix(in srgb, var(--accent) 35%, var(--border));
-  }
   .nav.grow {
     /* Grow into spare height (banner under the title, the board pinned to the bottom), but
        never shrink: on a short viewport the banner keeps its height and the board's own
@@ -130,34 +114,6 @@
     align-items: center;
     justify-content: center;
   }
-  /* The offline chip: a compact accent-tinted pill in the header's right slot. */
-  .chip {
-    min-width: 40px;
-    height: 24px;
-    display: inline-flex;
-    align-items: center;
-    justify-content: center;
-    padding: 0 8px;
-    font-size: 0.72rem;
-    font-weight: 600;
-    color: var(--accent);
-    background: color-mix(in srgb, var(--accent) 16%, transparent);
-    border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
-    border-radius: 999px;
-    white-space: nowrap;
-  }
-  /* The offline-readiness preload warning: a soft, muted strip in the ad banner's slot, sized like
-     the banner region so the bar does not jump when it appears. */
-  .preload-warn {
-    margin: 0;
-    padding: 7px var(--pad);
-    font-size: 0.78rem;
-    line-height: 1.3;
-    text-align: center;
-    color: var(--text-muted);
-    background: var(--surface-2);
-    border-top: 1px solid var(--border);
-  }
   .back {
     background: none;
     border: none;

ui/src/components/InstallApp.svelte

@@ -1,85 +0,0 @@
-<script lang="ts">
-  import { t } from '../lib/i18n/index.svelte';
-  import { installMode, promptInstall } from '../lib/pwa.svelte';
-  import Modal from './Modal.svelte';
-
-  // Platform-adaptive: 'oneTap' fires the native Chromium install dialog; 'iosInstructions' opens
-  // the manual Share -> Add-to-Home-Screen guide (iOS Safari has no programmatic install); 'hidden'
-  // renders nothing (already installed, inside a Telegram/VK Mini App, or an unsupported browser).
-  const mode = $derived(installMode());
-  let showIos = $state(false);
-
-  function onClick(): void {
-    // promptInstall must run synchronously from this gesture — the deferred prompt is gated on it.
-    if (mode === 'oneTap') void promptInstall();
-    else if (mode === 'iosInstructions') showIos = true;
-  }
-</script>
-
-{#if mode !== 'hidden'}
-  <button type="button" class="install" onclick={onClick}>
-    <img src="favicon.svg" alt="" width="40" height="40" />
-    <span class="text">
-      <span class="title">{t('install.title')}</span>
-      <span class="subtitle">{t('install.subtitle')}</span>
-    </span>
-  </button>
-{/if}
-
-{#if showIos}
-  <Modal title={t('install.iosTitle')} onclose={() => (showIos = false)}>
-    <ol class="steps">
-      <li>{t('install.iosStep1')}</li>
-      <li>{t('install.iosStep2')}</li>
-      <li>{t('install.iosStep3')}</li>
-    </ol>
-    <button type="button" class="ok" onclick={() => (showIos = false)}>{t('common.ok')}</button>
-  </Modal>
-{/if}
-
-<style>
-  .install {
-    display: flex;
-    align-items: center;
-    gap: 12px;
-    width: 100%;
-    text-align: left;
-    padding: 12px;
-    border: 1px solid var(--border);
-    border-radius: var(--radius-sm);
-    background: var(--surface);
-    color: var(--text);
-    cursor: pointer;
-  }
-  .install img {
-    flex: none;
-    border-radius: 8px;
-  }
-  .text {
-    display: flex;
-    flex-direction: column;
-    gap: 2px;
-    min-width: 0;
-  }
-  .title {
-    font-weight: 600;
-  }
-  .subtitle {
-    font-size: 0.85rem;
-    color: var(--text-muted);
-    line-height: 1.35;
-  }
-  .steps {
-    margin: 0 0 16px;
-    padding-left: 1.25rem;
-    line-height: 1.6;
-  }
-  .ok {
-    width: 100%;
-    padding: 10px 12px;
-    border: 1px solid var(--accent);
-    background: var(--accent);
-    color: var(--accent-text);
-    border-radius: var(--radius-sm);
-  }
-</style>

ui/src/components/PinPad.svelte

@@ -1,268 +0,0 @@
-<script lang="ts">
-  // Apple-lock-screen-style 4-digit PIN pad for offline pass-and-play (hotseat) games.
-  // Modes:
-  //   set     — enter a PIN, then repeat it to confirm; emits { kind: 'set', lock }.
-  //   verify  — enter a PIN; runs `verify(pin)` on the 4th digit; emits { kind: 'verified' }
-  //             or shakes + clears on a wrong PIN.
-  //   change  — run `verify` on the current PIN, then offer "set a new PIN" (the set flow)
-  //             or, when allowRemove, "remove PIN" ({ kind: 'removed' }).
-  // Verification is delegated to the caller's `verify` callback: at creation time it checks a
-  // UI-held lock (lib/pin verifyPin); in-game it delegates to the local source (which holds the
-  // stored lock). The pad never shows an OK button: entering the 4th digit is the action. PIN
-  // storage is a social lock, not cryptography — see lib/pin.ts.
-  import Modal from './Modal.svelte';
-  import { t } from '../lib/i18n/index.svelte';
-  import { newLock, type PinLock } from '../lib/pin';
-
-  /** PinResult is the outcome handed to onresult when the pad completes. */
-  export type PinResult =
-    | { kind: 'set'; lock: PinLock }
-    | { kind: 'verified' }
-    | { kind: 'removed' };
-
-  let {
-    mode,
-    title = '',
-    verify,
-    allowRemove = false,
-    onclose,
-    onresult,
-  }: {
-    mode: 'set' | 'verify' | 'change';
-    title?: string;
-    /** Verifies an entered PIN (required for 'verify' and 'change'). */
-    verify?: (pin: string) => Promise<boolean>;
-    allowRemove?: boolean;
-    onclose?: () => void;
-    onresult: (r: PinResult) => void;
-  } = $props();
-
-  const LEN = 4;
-
-  // 'old' verifies the existing PIN (change); 'menu' offers set-new / remove (change);
-  // 'enter' collects a PIN; 'confirm' re-enters it (set / change→new). `mode` is fixed
-  // for the pad's lifetime (callers mount a fresh pad per operation), so capturing its
-  // initial value here is intentional.
-  // svelte-ignore state_referenced_locally
-  let phase = $state<'old' | 'menu' | 'enter' | 'confirm'>(mode === 'change' ? 'old' : 'enter');
-  let buffer = $state('');
-  let first = $state(''); // the first entry, awaiting confirmation
-  let error = $state(false); // drives the error prompt + shake
-  let shakeSeq = $state(0); // bumped on each error to replay the shake animation
-  let busy = $state(false); // guards the async check between the 4th digit and the outcome
-
-  function promptText(): string {
-    if (error) return phase === 'confirm' ? t('pin.mismatch') : t('pin.wrong');
-    switch (phase) {
-      case 'old':
-        return t('pin.enterCurrent');
-      case 'confirm':
-        return t('pin.repeat');
-      default:
-        return mode === 'verify' ? t('pin.enter') : t('pin.create');
-    }
-  }
-
-  function fail(): void {
-    buffer = '';
-    error = true;
-    shakeSeq += 1;
-  }
-
-  async function commit(): Promise<void> {
-    busy = true;
-    try {
-      // Let the 4th dot register before the verdict: a beat so the fill (and, on failure, the shake)
-      // reads as a deliberate response rather than an instant flicker.
-      await new Promise((r) => setTimeout(r, 250));
-      if (phase === 'old') {
-        if (verify && (await verify(buffer))) {
-          buffer = '';
-          error = false;
-          phase = 'menu';
-        } else fail();
-      } else if (phase === 'enter' && mode === 'verify') {
-        if (verify && (await verify(buffer))) onresult({ kind: 'verified' });
-        else fail();
-      } else if (phase === 'enter') {
-        first = buffer;
-        buffer = '';
-        error = false;
-        phase = 'confirm';
-      } else if (phase === 'confirm') {
-        if (buffer === first) onresult({ kind: 'set', lock: await newLock(buffer) });
-        else {
-          first = '';
-          phase = 'enter';
-          fail();
-        }
-      }
-    } finally {
-      busy = false;
-    }
-  }
-
-  function press(d: string): void {
-    if (busy || phase === 'menu' || buffer.length >= LEN) return;
-    error = false;
-    buffer += d;
-    if (buffer.length === LEN) void commit();
-  }
-
-  function back(): void {
-    if (busy || phase === 'menu') return;
-    buffer = buffer.slice(0, -1);
-  }
-
-  function startNew(): void {
-    error = false;
-    first = '';
-    buffer = '';
-    phase = 'enter';
-  }
-
-  function onkey(e: KeyboardEvent): void {
-    if (e.key >= '0' && e.key <= '9') {
-      press(e.key);
-      e.preventDefault();
-    } else if (e.key === 'Backspace') {
-      back();
-      e.preventDefault();
-    } else if (e.key === 'Escape') {
-      onclose?.();
-    }
-  }
-
-  const keys = ['1', '2', '3', '4', '5', '6', '7', '8', '9'];
-  const slots = Array.from({ length: LEN }, (_, i) => i);
-</script>
-
-<svelte:window onkeydown={onkey} />
-
-<Modal {title} {onclose} overlayKeyboard>
-  <div class="pad">
-    {#if phase === 'menu'}
-      <div class="menu">
-        <button class="opt" onclick={startNew}>{t('pin.setNew')}</button>
-        {#if allowRemove}
-          <button class="opt danger" onclick={() => onresult({ kind: 'removed' })}>
-            {t('pin.remove')}
-          </button>
-        {/if}
-      </div>
-    {:else}
-      <p class="prompt" class:err={error}>{promptText()}</p>
-      {#key shakeSeq}
-        <div class="dots" class:shake={error} aria-hidden="true">
-          {#each slots as i}
-            <span class="dot" class:on={i < buffer.length}></span>
-          {/each}
-        </div>
-      {/key}
-      <div class="grid">
-        {#each keys as k}
-          <button class="key" onclick={() => press(k)} aria-label={k}>{k}</button>
-        {/each}
-        <span class="key spacer"></span>
-        <button class="key" onclick={() => press('0')} aria-label="0">0</button>
-        <button class="key back" onclick={back} aria-label="⌫" disabled={buffer.length === 0}>⌫</button>
-      </div>
-    {/if}
-  </div>
-</Modal>
-
-<style>
-  .pad {
-    display: flex;
-    flex-direction: column;
-    align-items: center;
-    gap: 16px;
-    padding-top: 4px;
-  }
-  .prompt {
-    margin: 0;
-    font-size: 0.95rem;
-    color: var(--muted, var(--text));
-    min-height: 1.2em;
-  }
-  .prompt.err {
-    color: var(--danger);
-  }
-  .dots {
-    display: flex;
-    gap: 16px;
-  }
-  .dot {
-    width: 14px;
-    height: 14px;
-    border-radius: 50%;
-    border: 1.5px solid var(--text);
-    box-sizing: border-box;
-  }
-  .dot.on {
-    background: var(--text);
-  }
-  .shake {
-    animation: shake 0.32s ease;
-  }
-  @keyframes shake {
-    0%, 100% { transform: translateX(0); }
-    20% { transform: translateX(-7px); }
-    40% { transform: translateX(7px); }
-    60% { transform: translateX(-5px); }
-    80% { transform: translateX(5px); }
-  }
-  .grid {
-    display: grid;
-    grid-template-columns: repeat(3, 1fr);
-    gap: 12px;
-  }
-  .key {
-    width: 62px;
-    height: 62px;
-    border-radius: 50%;
-    border: 1px solid var(--border);
-    background: var(--surface);
-    color: var(--text);
-    font-size: 1.4rem;
-    font-weight: 500;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-  }
-  .key:active {
-    background: var(--accent);
-    color: var(--accent-text);
-  }
-  .key.back {
-    border-color: transparent;
-    background: transparent;
-    font-size: 1.2rem;
-  }
-  .key.back:disabled {
-    opacity: 0.3;
-  }
-  .key.spacer {
-    border: none;
-    background: none;
-    pointer-events: none;
-  }
-  .menu {
-    display: flex;
-    flex-direction: column;
-    gap: 10px;
-    width: 100%;
-  }
-  .opt {
-    padding: 14px;
-    border: 1px solid var(--border);
-    background: var(--surface);
-    color: var(--text);
-    border-radius: var(--radius);
-    font-weight: 600;
-  }
-  .opt.danger {
-    border-color: var(--danger);
-    color: var(--danger);
-  }
-</style>

ui/src/game/CheckScreen.svelte

@@ -1,7 +1,6 @@
 <script lang="ts">
   import { onMount } from 'svelte';
   import { gateway } from '../lib/gateway';
-  import { gameSource, isLocalGameId } from '../lib/gamesource';
   import { handleError, showToast } from '../lib/app.svelte';
   import { t } from '../lib/i18n/index.svelte';
   import { alphabetLetters } from '../lib/alphabet';
@@ -21,10 +20,8 @@
 
   onMount(async () => {
     try {
-      // Include the alphabet so input sanitising + the check accept the variant's letters. Routed
-      // through gameSource so an offline (local) game resolves its state from the device, not the
-      // network.
-      const st = await gameSource(id).gameState(id, true);
+      // Include the alphabet so input sanitising + the check accept the variant's letters.
+      const st = await gateway.gameState(id, true);
       variant = st.game.variant;
     } catch (e) {
       handleError(e);
@@ -44,7 +41,7 @@
     cooling = true;
     setTimeout(() => (cooling = false), 5000);
     try {
-      const r = await gameSource(id).checkWord(id, w, variant);
+      const r = await gateway.checkWord(id, w, variant);
       checked.set(w, r.legal);
       result = { word: w, legal: r.legal };
     } catch (e) {
@@ -80,11 +77,7 @@
         : t('game.wordIllegal', { word: result.word })}
     </p>
     <div class="actions">
-      <!-- Complaints go to the admin over the network; a local (offline) game has no backend to
-           receive them, so the control is dropped there. -->
-      {#if !isLocalGameId(id)}
-        <button class="complain" onclick={complain}>{t('game.complain')}</button>
-      {/if}
+      <button class="complain" onclick={complain}>{t('game.complain')}</button>
       {#if result.legal}
         <a
           class="lookup"

ui/src/game/CommsHub.svelte

@@ -16,21 +16,15 @@
   // The game is rendered (and cached) before its comms open, so the cache tells us whether
   // it is still active without another fetch; an unknown game keeps the Dictionary offered.
   const active = $derived(getCachedGame(id)?.view.game.status !== 'finished');
-  // A local game has NO chat: an honest-AI game (vs_ai) and an offline pass-and-play (hotseat) game.
-  // Its hub is Dictionary-only.
-  const chatless = $derived(
-    (getCachedGame(id)?.view.game.vsAi ?? false) || (getCachedGame(id)?.view.game.hotseat ?? false),
-  );
+  // An honest-AI game has no chat at all, so its hub is Dictionary-only.
+  const vsAi = $derived(getCachedGame(id)?.view.game.vsAi ?? false);
   // Seeded once from the entry route's tab, then owned locally. The effect keeps the tab valid:
-  // a chatless game has only the Dictionary; a finished non-AI game has only Chat (a stale Dictionary
+  // an AI game has only the Dictionary; a finished non-AI game has only Chat (a stale Dictionary
   // deep-link falls back to Chat).
-  // A chatless game starts on the Dictionary regardless of the entry route — this keeps ChatScreen
-  // (which fetches chat over the network) from mounting even for a beat, which would otherwise raise
-  // an error toast in offline mode.
   // svelte-ignore state_referenced_locally
-  let tab = $state<CommsTab>(chatless ? 'dictionary' : initialTab);
+  let tab = $state<CommsTab>(initialTab);
   $effect(() => {
-    if (chatless) tab = 'dictionary';
+    if (vsAi) tab = 'dictionary';
     else if (tab === 'dictionary' && !active) tab = 'chat';
   });
 </script>
@@ -49,7 +43,7 @@
 
   {#snippet tabbar()}
     <TabBar>
-      {#if !chatless}
+      {#if !vsAi}
         <button class="tab" class:active={tab === 'chat'} onclick={() => (tab = 'chat')}>
           <span class="face"><span class="sq" aria-hidden="true">💬</span><span class="lbl">{t('game.chat')}</span></span>
         </button>

ui/src/game/Game.svelte

@@ -4,28 +4,24 @@
   import TabBar from '../components/TabBar.svelte';
   import TapConfirm from '../components/TapConfirm.svelte';
   import Modal from '../components/Modal.svelte';
-  import PinPad from '../components/PinPad.svelte';
   import DictWarmup from '../components/DictWarmup.svelte';
   import Board from './Board.svelte';
   import Rack from './Rack.svelte';
   import { gateway } from '../lib/gateway';
-  import { gameSource, localSource, isLocalGameId } from '../lib/gamesource';
   import { notePreviewLocal, notePreviewNetwork } from '../lib/localeval-metrics';
   import { navigate } from '../lib/router.svelte';
   import { app, handleError, showToast, markChatRead, seedChatUnread } from '../lib/app.svelte';
   import { connection } from '../lib/connection.svelte';
-  import { offlineMode } from '../lib/offline.svelte';
   import { GatewayError } from '../lib/client';
   import { t, type MessageKey } from '../lib/i18n/index.svelte';
   import type { EvalResult, MoveRecord, MoveResult, StateView, Tile } from '../lib/model';
   import { lastMoveCells, replay } from '../lib/board';
   import { badgeKind } from '../lib/unread';
-  import { seatMedal } from '../lib/result';
   import { historyGrid } from '../lib/history';
   import { centre, premiumGrid } from '../lib/premiums';
   import { variantNameKey, usesStarBlank, BLANK_STAR } from '../lib/variants';
   import { alphabetLetters, hasAlphabet } from '../lib/alphabet';
-  import { hintsLeft, hintGateRemainingMs, hintLockMinutes, HINT_GATE_MS } from '../lib/hints';
+  import { hintsLeft } from '../lib/hints';
   import { downloadUrl, shareOrDownloadGcg, shareUrlAsFile } from '../lib/share';
   import { insideVK, vkAndroidWebView, vkCopyText, vkDownloadFile, vkPlatform, vkShowImages } from '../lib/vk';
   import { getCachedGame, setCachedGame, setCachedDraft, type CachedGame } from '../lib/gamecache';
@@ -51,18 +47,6 @@
 
   let { id }: { id: string } = $props();
 
-  // The game's source: the local engine for an offline game id, otherwise the network gateway. The
-  // screen calls the game-loop methods (state/history/submit/pass/exchange/resign/hint/evaluate/
-  // draft) through it, so the same UI drives a local vs_ai game and an online one alike.
-  const source = $derived(gameSource(id));
-  // A local (offline) game plays entirely on-device, so it is always ready; an online game needs a
-  // live connection — and offline mode's kill switch refuses its calls — so its network actions are
-  // disabled while disconnected or in offline mode (which also stops the "something went wrong"
-  // toasts a blocked call would otherwise raise).
-  const netReady = $derived(isLocalGameId(id) || (connection.online && !offlineMode.active));
-  // Unsubscribes from a local game's robot-reply events (offline only; null for a network game).
-  let localUnsub: (() => void) | null = null;
-
   let view = $state<StateView | null>(null);
   let moves = $state<MoveRecord[]>([]);
   let placement = $state<Placement>(newPlacement([]));
@@ -165,42 +149,10 @@
   const playable = $derived(!!view && (view.game.status === 'active' || view.game.status === 'open'));
   const isMyTurn = $derived(!!view && playable && view.game.toMove === view.seat);
   const gameOver = $derived(!!view && view.game.status === 'finished');
-  // Offline hotseat: the seat to move is PIN-locked until its owner enters the seat PIN this turn.
-  // While locked the board stays visible but the rack is withheld and the move controls disabled;
-  // canMove folds the lock into isMyTurn (locked is always false for a network / vs_ai game).
-  const locked = $derived(!!view?.locked);
-  const canMove = $derived(isMyTurn && !locked);
   // The hint badge: this game's allowance remaining plus the LIVE global wallet. Reading the
   // wallet from the profile (not the per-game view snapshot) keeps it correct after a wallet
   // hint was spent in another game (see lib/hints).
   const hintCount = $derived(hintsLeft(view, app.profile?.hintBalance ?? 0));
-  // A vs_ai game's hint is unlimited and wallet-free, but idle-gated (an anti-frustration aid: it
-  // unlocks only after the player has been stuck ~30 min on a turn). The source (the SERVER clock
-  // online, the device clock offline) tells us the SECONDS LEFT (view.hintUnlockLeftSeconds); we
-  // anchor a MONOTONIC countdown (performance.now()) to it, so a client clock change cannot skew it.
-  // A fresh value arrives on load (armHintGate below); when the robot moves the wait is the full
-  // window. `monoNow` ticks so the 🔒 lifts live at the mark.
-  let hintGateStart = $state<number | null>(null); // performance.now() at the last anchor; null = open
-  let gateLeftMs = $state(0);
-  let monoNow = $state(performance.now());
-  const hintRemaining = $derived(hintGateRemainingMs(hintGateStart, gateLeftMs, monoNow));
-  const hintGated = $derived(hintRemaining > 0);
-  // Anchor the countdown to a freshly received seconds-left (or open the gate). Called on every state
-  // load from the view, and on the robot's move to the full window (the robot just moved).
-  function armHintGate(leftSeconds: number): void {
-    if (leftSeconds > 0) {
-      hintGateStart = performance.now();
-      gateLeftMs = leftSeconds * 1000;
-    } else {
-      hintGateStart = null;
-      gateLeftMs = 0;
-    }
-  }
-  $effect(() => {
-    if (!view?.game.vsAi) return;
-    const iv = setInterval(() => (monoNow = performance.now()), 10_000);
-    return () => clearInterval(iv);
-  });
   // RACK_SIZE mirrors the engine's rules.RackSize (7 for every current variant). The exchange
   // gate is only a UX guard: the backend stays the source of truth and rejects an under-supplied
   // exchange regardless (engine rejects when bag.Len() < rules.RackSize).
@@ -238,13 +190,11 @@
       // Fetch the saved draft alongside state and history (best-effort) so the composition is
       // applied in the same tick the board appears — never as a second, visible rack→board step.
       const [st, hist, draft] = await Promise.all([
-        source.gameState(id, includeAlphabet),
-        source.gameHistory(id),
-        source.draftGet(id).catch(() => ''),
+        gateway.gameState(id, includeAlphabet),
+        gateway.gameHistory(id),
+        gateway.draftGet(id).catch(() => ''),
       ]);
       view = st;
-      // Anchor the vs_ai idle-hint countdown to the freshly fetched seconds-left (0 = open / non-vs_ai).
-      armHintGate(st.game.vsAi ? (st.hintUnlockLeftSeconds ?? 0) : 0);
       syncWallet(st.walletBalance);
       // Seed the unread flag from the authoritative state (the live stream only raises it).
       seedChatUnread(id, st.game.unreadChat, st.game.unreadMessages);
@@ -270,7 +220,7 @@
     setCachedDraft(id, json);
     if (draftSaveTimer) clearTimeout(draftSaveTimer);
     draftSaveTimer = setTimeout(() => {
-      void source.draftSave(id, json).catch(() => {});
+      void gateway.draftSave(id, json).catch(() => {});
     }, 500);
   }
   // applyDraft restores the player's saved composition over a freshly loaded state: the rack
@@ -297,9 +247,6 @@
     if (cached) {
       view = cached.view;
       moves = cached.moves;
-      // Arm the vs_ai idle-hint countdown from the cached seconds-left so the 🔒 shows at once on a
-      // warm open (no wait for load()); the cached value is a snapshot, refreshed by load() below.
-      armHintGate(cached.view.game.vsAi ? (cached.view.hintUnlockLeftSeconds ?? 0) : 0);
       // Apply the cached draft synchronously so a warm/preloaded open paints the pending tiles
       // already on the board (no full-rack-then-jump). load() then refreshes in the background.
       applyDraft(cached.view, cached.draft ?? '');
@@ -317,12 +264,6 @@
         dict = m;
       });
     }
-    // A local (offline) game has no live stream: route the source's robot-reply events through the
-    // same app event hub the network stream feeds, so the event effect above reacts to
-    // opponent_moved / game_over identically.
-    if (isLocalGameId(id)) {
-      localUnsub = localSource.events(id, (e) => (app.lastEvent = e));
-    }
   });
 
   // Warm the game's dictionary for the local move preview once, when both the game and the
@@ -368,11 +309,7 @@
         // While composing, reload so a draft overlapping the new move is reconciled; otherwise apply
         // the move as a delta with no fetch.
         if (placement.pending.length > 0) void load();
-        else {
-          applyDelta(applyMoveDelta(cacheSnapshot(), { move: e.move, game: e.game, bagLen: e.bagLen }));
-          // The robot just moved (vs_ai) → the human's turn begins with the full idle window.
-          if (view?.game.vsAi) armHintGate(HINT_GATE_MS / 1000);
-        }
+        else applyDelta(applyMoveDelta(cacheSnapshot(), { move: e.move, game: e.game, bagLen: e.bagLen }));
       } else if (e.kind === 'your_turn' && e.gameId === id) {
         // The opponent_moved delta carries the new state; your_turn only confirms the turn. Refetch
         // only if we missed the move (our cached count trails the event's).
@@ -674,13 +611,8 @@
     // Flush a pending draft save so leaving mid-composition still persists it.
     if (draftSaveTimer) {
       clearTimeout(draftSaveTimer);
-      void source.draftSave(id, serializeDraft(rackIds, placement.pending)).catch(() => {});
+      void gateway.draftSave(id, serializeDraft(rackIds, placement.pending)).catch(() => {});
     }
-    localUnsub?.();
-    // Leaving a hotseat game re-locks the current seat, so returning from the lobby re-prompts its
-    // PIN. Read the id from the loaded view, NOT the `id` prop: a $props() value reads back undefined
-    // during Svelte teardown, and isLocalGameId(undefined) would throw and abort this cleanup.
-    if (view?.game.hotseat) localSource.relock(view.game.id);
   });
 
   function onCell(row: number, col: number) {
@@ -785,8 +717,8 @@
     // rapid placements do not pile up requests on a slow link.
     evalCtrl?.abort();
     evalCtrl = null;
-    // Off-turn (or a locked hotseat seat) the composition is position-only: no score preview.
-    if (!canMove) return;
+    // Off-turn the composition is position-only: no score preview or evaluate.
+    if (!isMyTurn) return;
     const sub = toSubmit(placement);
     if (!sub) return;
     // Instant on-device preview when the game's dictionary is warm; the network otherwise.
@@ -808,7 +740,7 @@
     evalCtrl = ctrl;
     previewTimer = setTimeout(async () => {
       try {
-        preview = await source.evaluate(id, sub.tiles, variant, ctrl.signal);
+        preview = await gateway.evaluate(id, sub.tiles, variant, ctrl.signal);
         notePreviewNetwork();
       } catch {
         /* best-effort (or aborted) */
@@ -844,106 +776,12 @@
     refreshRecent();
   }
 
-  // --- offline hotseat: seat unlock + host (referee) overrides -------------------
-  let unlockOpen = $state(false); // the current locked seat's owner enters their PIN to reveal the rack
-  // The host menu: 'pin' collects the master PIN, then 'menu' lists the overrides. hostPinEntered is
-  // the verified master PIN, reused to authorise the chosen action (the source re-checks it).
-  let hostMenuStep = $state<'closed' | 'pin' | 'menu'>('closed');
-  let hostPinEntered = $state('');
-  // The pending host action awaiting its confirm ("Skip X's turn?" etc.); null shows the menu list.
-  let hostConfirm = $state<{ action: 'skip' | 'resign' | 'terminate'; seat?: number; name?: string } | null>(null);
-  let hostDone = $state(false); // the transient success ✅ shown after an override
-
-  // hotseatName is the plain display name of a seat by index (hotseat seats are account-less local
-  // players, so no "you"/🤖 resolution is needed — unlike the seat-object seatName used elsewhere).
-  function hotseatName(i: number): string {
-    return view?.game.seats[i]?.displayName ?? '';
-  }
-
-  function startSkip(): void {
-    if (!view) return;
-    hostConfirm = { action: 'skip', seat: view.game.toMove, name: hotseatName(view.game.toMove) };
-  }
-
-  function flashDone(): void {
-    hostDone = true;
-    setTimeout(() => (hostDone = false), 1100);
-  }
-
-  // advanceHotseat re-points the screen at the next seat after a hotseat move: the source has advanced
-  // the turn and re-locked, so a fresh state gives the next seat's rack (empty while it is locked).
-  async function advanceHotseat(): Promise<void> {
-    const st = await source.gameState(id, false);
-    view = st;
-    rackIds = st.rack.map((_, i) => i);
-    placement = newPlacement(st.rack);
-    selected = null;
-    preview = null;
-    setCachedGame(id, st, moves, '');
-  }
-
-  // onUnlock verifies the current seat's PIN through the source (which reveals the rack on success)
-  // and applies the unlocked state; handed to the PIN pad as its verifier.
-  async function onUnlock(pin: string): Promise<boolean> {
-    try {
-      const st = await localSource.unlockSeat(id, pin);
-      view = st;
-      rackIds = st.rack.map((_, i) => i);
-      placement = newPlacement(st.rack);
-      selected = null;
-      return true;
-    } catch {
-      return false;
-    }
-  }
-
-  // verifyHost captures the entered master PIN (reused to authorise the chosen action) and checks it.
-  async function verifyHost(pin: string): Promise<boolean> {
-    hostPinEntered = pin;
-    return localSource.verifyHostPin(id, pin);
-  }
-
-  function hostConfirmText(c: { action: 'skip' | 'resign' | 'terminate'; name?: string }): string {
-    if (c.action === 'skip') return t('hotseat.askSkip', { name: c.name ?? '' });
-    if (c.action === 'resign') return t('hotseat.askExclude', { name: c.name ?? '' });
-    return t('hotseat.askTerminate');
-  }
-
-  async function runHostAction(): Promise<void> {
-    if (!hostConfirm) return;
-    const { action, seat } = hostConfirm;
-    hostConfirm = null;
-    hostMenuStep = 'closed';
-    busy = true;
-    try {
-      const st = await localSource.hostAction(id, hostPinEntered, action, seat);
-      if (st === null) {
-        navigate('/'); // terminated: the game is deleted, so return to the lobby
-        return;
-      }
-      view = st;
-      rackIds = st.rack.map((_, i) => i);
-      placement = newPlacement(st.rack);
-      selected = null;
-      preview = null;
-      moves = (await source.gameHistory(id)).moves; // a skip / resign added a journal move
-      setCachedGame(id, st, moves, '');
-      flashDone();
-    } catch (e) {
-      handleError(e);
-    } finally {
-      busy = false;
-      hostPinEntered = '';
-    }
-  }
-
   async function commit() {
     const sub = toSubmit(placement);
     if (!sub) return;
     busy = true;
     try {
-      applyMoveResult(await source.submitPlay(id, sub.tiles, variant));
-      if (view?.game.hotseat) await advanceHotseat();
+      applyMoveResult(await gateway.submitPlay(id, sub.tiles, variant));
       haptic('success');
       zoomed = false;
     } catch (e) {
@@ -962,8 +800,7 @@
   async function doPass() {
     busy = true;
     try {
-      applyMoveResult(await source.pass(id));
-      if (view?.game.hotseat) await advanceHotseat();
+      applyMoveResult(await gateway.pass(id));
     } catch (e) {
       handleError(e);
     } finally {
@@ -984,7 +821,7 @@
     resignOpen = false;
     busy = true;
     try {
-      applyMoveResult(await source.resign(id));
+      applyMoveResult(await gateway.resign(id));
       // Reveal the final board once the game is resigned: close the move-history drawer
       // (portrait — the landscape dock is unaffected) and zoom out if it was magnified.
       historyOpen = false;
@@ -996,17 +833,8 @@
     }
   }
   async function doHint() {
-    // vs_ai: the idle gate replaces the wallet. While it is still closed, a tap only explains when the
-    // hint unlocks (no wallet is ever spent) — matching the 🔒 badge. Measured fresh at tap time.
-    if (view?.game.vsAi) {
-      const remaining = hintGateRemainingMs(hintGateStart, gateLeftMs, performance.now());
-      if (remaining > 0) {
-        showToast(t('game.hintLockedIn', { n: hintLockMinutes(remaining) }), 'info');
-        return;
-      }
-    }
     try {
-      const h = await source.hint(id);
+      const h = await gateway.hint(id);
       if (h.move.tiles.length && view) {
         placement = placementFromHint(h.move.tiles, view.rack);
         // Scroll the (zoomed) board to the hint's placement rather than the top-left:
@@ -1041,12 +869,6 @@
       // The backend does not spend a hint when there is no move.
       if (e instanceof GatewayError && e.code === 'no_hint_available') {
         showToast(t('game.noHintOptions'), 'info');
-      } else if (e instanceof GatewayError && e.code === 'hint_locked') {
-        // The server-clock backstop refused a vs_ai hint the client thought was open (a rare client
-        // clock desync): re-sync the countdown from a fresh fetch and explain the gate.
-        await load();
-        const left = hintGateRemainingMs(hintGateStart, gateLeftMs, performance.now());
-        showToast(t('game.hintLockedIn', { n: hintLockMinutes(left || 60_000) }), 'info');
       } else {
         handleError(e);
       }
@@ -1084,8 +906,7 @@
     exchangeOpen = false;
     busy = true;
     try {
-      applyMoveResult(await source.exchange(id, tiles, variant));
-      if (view?.game.hotseat) await advanceHotseat();
+      applyMoveResult(await gateway.exchange(id, tiles, variant));
     } catch (e) {
       handleError(e);
     } finally {
@@ -1107,15 +928,7 @@
     if (!view) return '';
     const me = view.game.seats[view.seat];
     if (me?.isWinner) return t('game.won');
-    if (view.game.endReason === 'aborted') return t('game.tied'); // an abort is a draw for everyone
-    const myScore = me?.score ?? 0;
-    // A declared winner (incl. by resignation) that is not me, or anyone who scored higher → a loss.
-    if (view.game.seats.some((s) => s.isWinner) || view.game.seats.some((s) => !s.resigned && s.score > myScore)) {
-      return t('game.lost');
-    }
-    // No one above me and no declared winner: a tie for the lead is a (shared) win; only an
-    // all-level finish is a draw.
-    return view.game.seats.filter((s) => !s.resigned).every((s) => s.score === myScore) ? t('game.tied') : t('game.won');
+    return view.game.seats.some((s) => s.isWinner) ? t('game.lost') : t('game.tied');
   }
 
   // The finished-game export offers two formats — the GCG file and the server-rendered PNG
@@ -1431,9 +1244,8 @@
   // (not the still-empty seat of an open game) who is not yet a friend (an already-requested
   // opponent still shows it, but disabled).
   function canAddFriend(s: { accountId: string; seat: number }): boolean {
-    // Never offer add-friend against an AI opponent, an existing friend, or a blocked player — nor in
-    // a local (offline) game, whose seats are account-less: vs_ai, and hotseat's synthetic seat ids.
-    if (view?.game.vsAi || isLocalGameId(id)) return false;
+    // Never offer add-friend against an AI opponent, an existing friend, or a blocked player.
+    if (view?.game.vsAi) return false;
     return (
       !!s.accountId &&
       !app.profile?.isGuest &&
@@ -1447,7 +1259,7 @@
   // may still be blocked (the block overrides the friendship), so it omits the friend exclusion.
   // An already-blocked opponent hides it (both controls go, and the name is struck).
   function canBlock(s: { accountId: string; seat: number }): boolean {
-    if (view?.game.vsAi || isLocalGameId(id)) return false;
+    if (view?.game.vsAi) return false;
     return !!s.accountId && !app.profile?.isGuest && s.accountId !== app.session?.userId && !seatBlocked(s);
   }
 </script>
@@ -1505,7 +1317,7 @@
       {#if badge}<span class="unread-dot sbadge-dot" class:nudge={badge === 'nudge'}></span>{/if}
       {#each view.game.seats as s (s.seat)}
         <div class="seat" class:turn={view.game.toMove === s.seat && !gameOver} class:win={s.isWinner}>
-          <div class="nm" class:struck={seatBlocked(s)}>{#if gameOver && view.game.hotseat}<span class="medal" aria-hidden="true">{seatMedal(view.game, s.seat)}</span>{/if}{seatName(s)}</div>
+          <div class="nm" class:struck={seatBlocked(s)}>{seatName(s)}</div>
           <div class="sc" class:blockprompt={blockConfirm[s.seat]}>
             {#if blockConfirm[s.seat]}{t('game.blockShort')}{:else if addConfirm[s.seat]}{t('game.addFriendShort')}{:else}{s.score}{/if}
           </div>
@@ -1549,18 +1361,13 @@
         {:else}
           <button class="hicon" onclick={onExportClick} aria-label={t('game.exportGcg')}>📤</button>
         {/if}
-      {:else if view.game.hotseat}
-        <!-- Hotseat resign is a host (referee) action, not self-serve; keep the slot empty. -->
-        <span aria-hidden="true"></span>
       {:else}
         <button class="hicon" onclick={onResignClick} disabled={waitingForOpponent} aria-label={t('game.dropGame')}>🏁</button>
       {/if}
       {#if !view.game.multipleWordsPerTurn}<span class="oneword-label">{t('game.oneWordRule')}</span>{/if}
-      <!-- The comms entry opens Chat + the word Dictionary. A local game (vs_ai or hotseat) has no
-           chat, so its hub is Dictionary-only (CommsHub), and once finished the dictionary closes too
-           — so drop the entry only when a local game is finished; an active local game keeps it for
-           the Dictionary. An online game always keeps it (chat outlives the game). -->
-      {#if !(gameOver && (view.game.vsAi || view.game.hotseat))}
+      <!-- A finished AI game has no comms at all (no chat, and the dictionary closes with the
+           game), so the entry is dropped; an active AI game keeps it (it opens the dictionary). -->
+      {#if !(gameOver && view.game.vsAi)}
         <button class="hicon" onclick={() => navigate(`/game/${id}/chat`)} aria-label={t('game.chat')}>
           {#key chatBlink}<span class="chat-ico" class:blink={chatBlink > 0 && !app.reduceMotion}>💬</span>{/key}
         </button>
@@ -1631,12 +1438,9 @@
     <div class="status">
       <span>{view.bagLen === 0 ? t('game.bagEmpty') : t('game.bag', { n: view.bagLen })}</span>
       {#if gameOver}
-        <!-- A hotseat game shows its result as per-seat medals on the plaques (below), not a
-             viewer-centric "you won/lost" — with 2-4 local players there is no single "you". A vs_ai
-             game keeps the "you won/lost" text (one human). -->
-        {#if !view.game.hotseat}<strong class="over">{resultText()}</strong>{/if}
+        <strong class="over">{resultText()}</strong>
       {:else if placement.pending.length === 0}
-        <span class="turn-ind">{view.game.hotseat ? t('hotseat.turnOf', { name: hotseatName(view.game.toMove) }) : isMyTurn ? t('game.yourTurn') : turnLabel()}</span>
+        <span class="turn-ind">{isMyTurn ? t('game.yourTurn') : turnLabel()}</span>
       {/if}
       <span class="scores">
         {#if recallOverRack}{:else if preview}{preview.legal ? t('game.previewWords', { words: preview.words.join(', '), n: preview.score }) : t('game.previewIllegal')}{/if}
@@ -1650,58 +1454,36 @@
        a finished game shows the final rack greyed out and the controls disabled. -->
   <div class="rack-row" class:inert={gameOver} data-coach="game-rack">
     <div class="rack-wrap">
-      {#if locked}
-        <!-- A PIN-locked hotseat seat: the rack is withheld until its owner unlocks it. The board
-             above stays visible; only this tray is gated. -->
-        <button class="unlock" onclick={() => (unlockOpen = true)}>🔒 {t('hotseat.unlock')}</button>
-      {:else}
-        <Rack
-          slots={rackSlots}
-          {variant}
-          {selected}
-          {landscape}
-          shuffling={shuffling && !app.reduceMotion}
-          draggingId={reorderDragId}
-          dropIndex={reorderTo}
-          ondown={onRackDown}
-        />
-      {/if}
+      <Rack
+        slots={rackSlots}
+        {variant}
+        {selected}
+        {landscape}
+        shuffling={shuffling && !app.reduceMotion}
+        draggingId={reorderDragId}
+        dropIndex={reorderTo}
+        ondown={onRackDown}
+      />
     </div>
     {#if !gameOver && placement.pending.length > 0 && !recallOverRack}
-      <button class="make" onclick={commit} disabled={busy || !canMove || !netReady || !preview?.legal} aria-label={t('game.makeMove')}>✅</button>
+      <button class="make" onclick={commit} disabled={busy || !isMyTurn || !connection.online || !preview?.legal} aria-label={t('game.makeMove')}>✅</button>
     {/if}
   </div>
 {/snippet}
 
 {#snippet controlButtons()}
-  <button class="tab" disabled={busy || !canMove || !netReady} onclick={openExchange}>
+  <button class="tab" disabled={busy || !isMyTurn || !connection.online} onclick={openExchange}>
     <span class="sq" data-coach="game-turn">🔄</span><span class="lbl">{t('game.draw')}</span>
   </button>
-  {#if view?.game.hotseat}
-    <!-- Hotseat: no hints. The freed slot becomes the host (referee) button — always available
-         (even on a locked seat: the host may skip a player who forgot their PIN). -->
-    <button class="tab" disabled={busy || gameOver} onclick={() => (hostMenuStep = 'pin')}>
-      <span class="sq">🔐</span><span class="lbl">{t('hotseat.host')}</span>
-    </button>
-  {:else if view?.game.vsAi}
-    <!-- vs_ai hints are unlimited and wallet-free, so no confirm and no count. A 🔒 badge marks the
-         idle gate while it is closed; tapping then only explains when it opens (doHint), and the lock
-         lifts live at the unlock moment. -->
-    <button class="tab" disabled={busy || !isMyTurn || !netReady} onclick={doHint}>
-      <span class="sq" data-coach="game-hints">🛟{#if hintGated}<span class="lock" aria-hidden="true">🔒</span>{/if}</span>
-      <span class="lbl">{t('game.hint')}</span>
-    </button>
-  {:else}
-    <TapConfirm
-      triggerClass="tab"
-      label={t('game.hint')}
-      disabled={busy || !isMyTurn || !netReady || hintCount <= 0}
-      onconfirm={doHint}
-    >
-      <span class="sq" data-coach="game-hints">🛟{#if hintCount > 0}<span class="badge">{hintCount}</span>{/if}</span>
-      <span class="lbl">{t('game.hint')}</span>
-    </TapConfirm>
-  {/if}
+  <TapConfirm
+    triggerClass="tab"
+    label={t('game.hint')}
+    disabled={busy || !isMyTurn || !connection.online || hintCount <= 0}
+    onconfirm={doHint}
+  >
+    <span class="sq" data-coach="game-hints">🛟{#if hintCount > 0}<span class="badge">{hintCount}</span>{/if}</span>
+    <span class="lbl">{t('game.hint')}</span>
+  </TapConfirm>
   {#if placement.pending.length > 0}
     <button class="tab" disabled={busy} onclick={resetPlacement}>
       <span class="sq">↩️</span><span class="lbl">{t('game.reset')}</span>
@@ -1754,60 +1536,11 @@
   <Modal title={t('game.confirmResign')} onclose={() => (resignOpen = false)}>
     <div class="confirm-row">
       <button class="cancel" onclick={() => (resignOpen = false)}>{t('common.cancel')}</button>
-      <button class="danger" onclick={doResign} disabled={!netReady}>{t('game.dropGame')}</button>
+      <button class="danger" onclick={doResign} disabled={!connection.online}>{t('game.dropGame')}</button>
     </div>
   </Modal>
 {/if}
 
-<!-- Offline hotseat: unlock the current seat's rack. -->
-{#if unlockOpen && view}
-  <PinPad
-    mode="verify"
-    title={t('hotseat.unlockTitle', { name: hotseatName(view.game.toMove) })}
-    verify={onUnlock}
-    onclose={() => (unlockOpen = false)}
-    onresult={() => (unlockOpen = false)}
-  />
-{/if}
-
-<!-- Offline hotseat: the host (referee) enters the master PIN, then picks an override. -->
-{#if hostMenuStep === 'pin'}
-  <PinPad
-    mode="verify"
-    title={t('hotseat.host')}
-    verify={verifyHost}
-    onclose={() => (hostMenuStep = 'closed')}
-    onresult={() => (hostMenuStep = 'menu')}
-  />
-{/if}
-{#if hostMenuStep === 'menu' && view}
-  <Modal title={t('hotseat.host')} onclose={() => { hostMenuStep = 'closed'; hostConfirm = null; }}>
-    {#if hostConfirm}
-      <p class="host-q">{hostConfirmText(hostConfirm)}</p>
-      <div class="confirm-row">
-        <button class="cancel" onclick={() => (hostConfirm = null)}>{t('common.cancel')}</button>
-        <button class="danger" onclick={runHostAction}>{t('common.ok')}</button>
-      </div>
-    {:else}
-      <div class="host-menu">
-        <button class="host-act" onclick={startSkip}>
-          {t('hotseat.skip')}
-        </button>
-        <div class="host-sub">{t('hotseat.exclude')}</div>
-        {#each view.game.seats as s (s.seat)}
-          <button class="host-seat" onclick={() => (hostConfirm = { action: 'resign', seat: s.seat, name: s.displayName })}>
-            {s.displayName}
-          </button>
-        {/each}
-        <button class="host-act danger" onclick={() => (hostConfirm = { action: 'terminate' })}>{t('hotseat.terminate')}</button>
-      </div>
-    {/if}
-  </Modal>
-{/if}
-{#if hostDone}
-  <div class="host-done" aria-hidden="true">✅</div>
-{/if}
-
 {#if exportOpen}
   <Modal title={t('game.exportGcg')} onclose={() => (exportOpen = false)}>
     <div class="export-opts">
@@ -1815,7 +1548,7 @@
         <button
           class="confirm"
           onclick={() => { exportOpen = false; void exportArtifact('png'); }}
-          disabled={!netReady}
+          disabled={!connection.online}
         >
           {t('game.exportImageOpt')}
         </button>
@@ -1823,7 +1556,7 @@
       <button
         class={exportImageAvailable ? 'export-alt' : 'confirm'}
         onclick={() => { exportOpen = false; void exportArtifact('gcg'); }}
-        disabled={!netReady}
+        disabled={!connection.online}
       >
         {t('game.exportGcgOpt')}
       </button>
@@ -1877,10 +1610,6 @@
     overflow: hidden;
     text-overflow: ellipsis;
   }
-  /* The finished-game place medal on a local (offline) seat plaque, left of the name. */
-  .medal {
-    margin-right: 3px;
-  }
   .sc {
     font-weight: 700;
     font-variant-numeric: tabular-nums;
@@ -2302,76 +2031,4 @@
   .scoreboard.flat {
     cursor: default;
   }
-  /* The vs_ai hint's idle lock: a small 🔒 at the icon-square corner (the .sq is positioned by the
-     shared TabBar rule). No count pill — the hint is unlimited; the lock alone marks the gate. */
-  .sq .lock {
-    position: absolute;
-    top: -4px;
-    right: -4px;
-    font-size: 0.62rem;
-    line-height: 1;
-  }
-  /* --- offline hotseat --- */
-  /* The locked-seat rack overlay: fills the rack tray with an "unlock" button, the board above
-     stays visible. */
-  .unlock {
-    width: 100%;
-    height: 100%;
-    min-height: 44px;
-    border: 1px dashed var(--border);
-    border-radius: var(--radius-sm);
-    background: var(--surface);
-    color: var(--text);
-    font-weight: 600;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    gap: 8px;
-  }
-  .host-menu {
-    display: flex;
-    flex-direction: column;
-    gap: 8px;
-  }
-  .host-act,
-  .host-seat {
-    padding: 12px;
-    border: 1px solid var(--border);
-    border-radius: var(--radius-sm);
-    background: var(--surface);
-    color: var(--text);
-    font-weight: 600;
-    text-align: left;
-  }
-  .host-act.danger {
-    border-color: var(--danger);
-    color: var(--danger);
-  }
-  .host-sub {
-    font-size: 0.8rem;
-    color: var(--text-muted);
-    margin-top: 4px;
-  }
-  .host-q {
-    margin: 0 0 12px;
-    font-weight: 600;
-  }
-  /* The transient success tick after a host override — a centred ✅ that fades out on a timer. */
-  .host-done {
-    position: fixed;
-    inset: 0;
-    display: flex;
-    align-items: center;
-    justify-content: center;
-    font-size: 4rem;
-    z-index: 50;
-    pointer-events: none;
-    animation: host-done-fade 1.1s ease forwards;
-  }
-  @keyframes host-done-fade {
-    0% { opacity: 0; transform: scale(0.7); }
-    25% { opacity: 1; transform: scale(1); }
-    75% { opacity: 1; transform: scale(1); }
-    100% { opacity: 0; transform: scale(1); }
-  }
 </style>

ui/src/gen/fbs/scrabblefb.ts

@@ -17,7 +17,6 @@ export { ChatPostRequest } from './scrabblefb/chat-post-request.js';
 export { CheckWordRequest } from './scrabblefb/check-word-request.js';
 export { ComplaintRequest } from './scrabblefb/complaint-request.js';
 export { CreateInvitationRequest } from './scrabblefb/create-invitation-request.js';
-export { DictVersion } from './scrabblefb/dict-version.js';
 export { DraftRequest } from './scrabblefb/draft-request.js';
 export { DraftView } from './scrabblefb/draft-view.js';
 export { EmailConfirmLinkRequest } from './scrabblefb/email-confirm-link-request.js';

ui/src/gen/fbs/scrabblefb/dict-version.ts

@@ -1,60 +0,0 @@
-// automatically generated by the FlatBuffers compiler, do not modify
-
-import * as flatbuffers from 'flatbuffers';
-
-export class DictVersion {
-  bb: flatbuffers.ByteBuffer|null = null;
-  bb_pos = 0;
-  __init(i:number, bb:flatbuffers.ByteBuffer):DictVersion {
-  this.bb_pos = i;
-  this.bb = bb;
-  return this;
-}
-
-static getRootAsDictVersion(bb:flatbuffers.ByteBuffer, obj?:DictVersion):DictVersion {
-  return (obj || new DictVersion()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
-}
-
-static getSizePrefixedRootAsDictVersion(bb:flatbuffers.ByteBuffer, obj?:DictVersion):DictVersion {
-  bb.setPosition(bb.position() + flatbuffers.SIZE_PREFIX_LENGTH);
-  return (obj || new DictVersion()).__init(bb.readInt32(bb.position()) + bb.position(), bb);
-}
-
-variant():string|null
-variant(optionalEncoding:flatbuffers.Encoding):string|Uint8Array|null
-variant(optionalEncoding?:any):string|Uint8Array|null {
-  const offset = this.bb!.__offset(this.bb_pos, 4);
-  return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
-}
-
-version():string|null
-version(optionalEncoding:flatbuffers.Encoding):string|Uint8Array|null
-version(optionalEncoding?:any):string|Uint8Array|null {
-  const offset = this.bb!.__offset(this.bb_pos, 6);
-  return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
-}
-
-static startDictVersion(builder:flatbuffers.Builder) {
-  builder.startObject(2);
-}
-
-static addVariant(builder:flatbuffers.Builder, variantOffset:flatbuffers.Offset) {
-  builder.addFieldOffset(0, variantOffset, 0);
-}
-
-static addVersion(builder:flatbuffers.Builder, versionOffset:flatbuffers.Offset) {
-  builder.addFieldOffset(1, versionOffset, 0);
-}
-
-static endDictVersion(builder:flatbuffers.Builder):flatbuffers.Offset {
-  const offset = builder.endObject();
-  return offset;
-}
-
-static createDictVersion(builder:flatbuffers.Builder, variantOffset:flatbuffers.Offset, versionOffset:flatbuffers.Offset):flatbuffers.Offset {
-  DictVersion.startDictVersion(builder);
-  DictVersion.addVariant(builder, variantOffset);
-  DictVersion.addVersion(builder, versionOffset);
-  return DictVersion.endDictVersion(builder);
-}
-}

ui/src/gen/fbs/scrabblefb/email-request-request.ts

@@ -41,13 +41,8 @@ language(optionalEncoding?:any):string|Uint8Array|null {
   return offset ? this.bb!.__string(this.bb_pos + offset, optionalEncoding) : null;
 }
 
-pwa():boolean {
-  const offset = this.bb!.__offset(this.bb_pos, 10);
-  return offset ? !!this.bb!.readInt8(this.bb_pos + offset) : false;
-}
-
 static startEmailRequestRequest(builder:flatbuffers.Builder) {
-  builder.startObject(4);
+  builder.startObject(3);
 }
 
 static addEmail(builder:flatbuffers.Builder, emailOffset:flatbuffers.Offset) {
@@ -62,21 +57,16 @@ static addLanguage(builder:flatbuffers.Builder, languageOffset:flatbuffers.Offse
   builder.addFieldOffset(2, languageOffset, 0);
 }
 
-static addPwa(builder:flatbuffers.Builder, pwa:boolean) {
-  builder.addFieldInt8(3, +pwa, +false);
-}
-
 static endEmailRequestRequest(builder:flatbuffers.Builder):flatbuffers.Offset {
   const offset = builder.endObject();
   return offset;
 }
 
-static createEmailRequestRequest(builder:flatbuffers.Builder, emailOffset:flatbuffers.Offset, browserTzOffset:flatbuffers.Offset, languageOffset:flatbuffers.Offset, pwa:boolean):flatbuffers.Offset {
+static createEmailRequestRequest(builder:flatbuffers.Builder, emailOffset:flatbuffers.Offset, browserTzOffset:flatbuffers.Offset, languageOffset:flatbuffers.Offset):flatbuffers.Offset {
   EmailRequestRequest.startEmailRequestRequest(builder);
   EmailRequestRequest.addEmail(builder, emailOffset);
   EmailRequestRequest.addBrowserTz(builder, browserTzOffset);
   EmailRequestRequest.addLanguage(builder, languageOffset);
-  EmailRequestRequest.addPwa(builder, pwa);
   return EmailRequestRequest.endEmailRequestRequest(builder);
 }
 }

ui/src/gen/fbs/scrabblefb/profile.ts

@@ -3,7 +3,6 @@
 import * as flatbuffers from 'flatbuffers';
 
 import { BannerInfo } from '../scrabblefb/banner-info.js';
-import { DictVersion } from '../scrabblefb/dict-version.js';
 
 
 export class Profile {
@@ -125,18 +124,8 @@ vkLinked():boolean {
   return offset ? !!this.bb!.readInt8(this.bb_pos + offset) : false;
 }
 
-dictVersions(index: number, obj?:DictVersion):DictVersion|null {
-  const offset = this.bb!.__offset(this.bb_pos, 36);
-  return offset ? (obj || new DictVersion()).__init(this.bb!.__indirect(this.bb!.__vector(this.bb_pos + offset) + index * 4), this.bb!) : null;
-}
-
-dictVersionsLength():number {
-  const offset = this.bb!.__offset(this.bb_pos, 36);
-  return offset ? this.bb!.__vector_len(this.bb_pos + offset) : 0;
-}
-
 static startProfile(builder:flatbuffers.Builder) {
-  builder.startObject(17);
+  builder.startObject(16);
 }
 
 static addUserId(builder:flatbuffers.Builder, userIdOffset:flatbuffers.Offset) {
@@ -215,22 +204,6 @@ static addVkLinked(builder:flatbuffers.Builder, vkLinked:boolean) {
   builder.addFieldInt8(15, +vkLinked, +false);
 }
 
-static addDictVersions(builder:flatbuffers.Builder, dictVersionsOffset:flatbuffers.Offset) {
-  builder.addFieldOffset(16, dictVersionsOffset, 0);
-}
-
-static createDictVersionsVector(builder:flatbuffers.Builder, data:flatbuffers.Offset[]):flatbuffers.Offset {
-  builder.startVector(4, data.length, 4);
-  for (let i = data.length - 1; i >= 0; i--) {
-    builder.addOffset(data[i]!);
-  }
-  return builder.endVector();
-}
-
-static startDictVersionsVector(builder:flatbuffers.Builder, numElems:number) {
-  builder.startVector(4, numElems, 4);
-}
-
 static endProfile(builder:flatbuffers.Builder):flatbuffers.Offset {
   const offset = builder.endObject();
   return offset;

ui/src/gen/fbs/scrabblefb/state-view.ts

@@ -74,13 +74,8 @@ walletBalance():number {
   return offset ? this.bb!.readInt32(this.bb_pos + offset) : 0;
 }
 
-hintUnlockLeftSeconds():number {
-  const offset = this.bb!.__offset(this.bb_pos, 18);
-  return offset ? this.bb!.readInt32(this.bb_pos + offset) : 0;
-}
-
 static startStateView(builder:flatbuffers.Builder) {
-  builder.startObject(8);
+  builder.startObject(7);
 }
 
 static addGame(builder:flatbuffers.Builder, gameOffset:flatbuffers.Offset) {
@@ -135,16 +130,12 @@ static addWalletBalance(builder:flatbuffers.Builder, walletBalance:number) {
   builder.addFieldInt32(6, walletBalance, 0);
 }
 
-static addHintUnlockLeftSeconds(builder:flatbuffers.Builder, hintUnlockLeftSeconds:number) {
-  builder.addFieldInt32(7, hintUnlockLeftSeconds, 0);
-}
-
 static endStateView(builder:flatbuffers.Builder):flatbuffers.Offset {
   const offset = builder.endObject();
   return offset;
 }
 
-static createStateView(builder:flatbuffers.Builder, gameOffset:flatbuffers.Offset, seat:number, rackOffset:flatbuffers.Offset, bagLen:number, hintsRemaining:number, alphabetOffset:flatbuffers.Offset, walletBalance:number, hintUnlockLeftSeconds:number):flatbuffers.Offset {
+static createStateView(builder:flatbuffers.Builder, gameOffset:flatbuffers.Offset, seat:number, rackOffset:flatbuffers.Offset, bagLen:number, hintsRemaining:number, alphabetOffset:flatbuffers.Offset, walletBalance:number):flatbuffers.Offset {
   StateView.startStateView(builder);
   StateView.addGame(builder, gameOffset);
   StateView.addSeat(builder, seat);
@@ -153,7 +144,6 @@ static createStateView(builder:flatbuffers.Builder, gameOffset:flatbuffers.Offse
   StateView.addHintsRemaining(builder, hintsRemaining);
   StateView.addAlphabet(builder, alphabetOffset);
   StateView.addWalletBalance(builder, walletBalance);
-  StateView.addHintUnlockLeftSeconds(builder, hintUnlockLeftSeconds);
   return StateView.endStateView(builder);
 }
 }

ui/src/lib/app.svelte.ts

@@ -35,17 +35,12 @@ import {
 } from './telegram';
 import { onVKPath, insideVK, vkInit, vkClose, vkDisableSwipeBack, vkLaunchParams, vkUserName, vkStartParam, vkOnScheme, vkOnInsets, vkSetViewSettings, appearanceForBg } from './vk';
 import { pendingVKLink, type VKLinkCallback } from './vkid';
-import { isStandalone } from './pwa';
-import { registerServiceWorker } from './pwa.svelte';
 import { haptic } from './haptics';
 import { CLOUD_PREFS_KEY, decodeClientPrefs, encodeClientPrefs } from './cloudprefs';
 import { parseStartParam } from './deeplink';
 import {
   clearOnboarding,
   clearSession,
-  clearProfile,
-  loadProfile,
-  saveProfile,
   loadOnboarding,
   loadPrefs,
   loadSession,
@@ -55,9 +50,7 @@ import {
   savePrefs,
 } from './session';
 import type { CoachSeries } from './coachmark';
-import { connection, reportOffline, reportOnline, resetConnection, checkReachable } from './connection.svelte';
-import { offlineMode, setOfflineMode } from './offline.svelte';
-import { shouldBootOffline } from './offline';
+import { connection, reportOffline, reportOnline, resetConnection } from './connection.svelte';
 import { isConnectionCode } from './retry';
 import { clearGameCache, getCachedGame, setCachedGame } from './gamecache';
 import { advanceCached } from './gamedelta';
@@ -78,10 +71,6 @@ export const app = $state<{
    *  backend was down during a deploy). App.svelte then renders the boot-error retry screen
    *  instead of the web login — a Mini App has no manual sign-in to fall back to. */
   bootError: boolean;
-  /** True while the cold-start "no connection — go offline?" dialog is up (the reachability check
-   *  timed out with the network interface reportedly online). App.svelte renders it over the splash;
-   *  bootstrap awaits the choice via resolveOfflinePrompt. */
-  offlinePrompt: boolean;
   /** On the dedicated /telegram/ entry, set to a privacy-safe diagnostic snapshot when a Mini App
    *  launch carried no sign-in data (empty initData). App.svelte then renders the compact
    *  launch-error screen (screens/TelegramLaunchError) — a shareable probe for why Telegram
@@ -152,7 +141,6 @@ export const app = $state<{
 }>({
   ready: false,
   bootError: false,
-  offlinePrompt: false,
   launchError: null,
   debugOpen: false,
   lobbyReady: false,
@@ -304,9 +292,7 @@ export function handleError(err: unknown): void {
     void enterBlocked();
     return;
   }
-  // A blocked call in offline mode ('offline', the transport kill switch) is expected, not an error
-  // to surface — the offline chrome already signals the state; never a red toast.
-  if (isConnectionCode(code) || code === 'offline' || !connection.online) return;
+  if (isConnectionCode(code) || !connection.online) return;
   haptic('error');
   showToast(t(code ? errorKey(code) : 'error.generic'), 'error');
 }
@@ -472,7 +458,6 @@ export async function refreshProfile(): Promise<void> {
   if (!app.session) return;
   try {
     app.profile = await gateway.profileGet();
-    void saveProfile($state.snapshot(app.profile)); // keep the offline-boot cache fresh (plain snapshot)
   } catch {
     // Best-effort; the banner just stays as it was until the next fetch.
   }
@@ -530,11 +515,6 @@ async function adoptSession(s: Session): Promise<void> {
   await saveSession(s);
   try {
     app.profile = await gateway.profileGet();
-    // Persist the profile so a later offline cold start can launch from it (its variant
-    // preferences, dictionary versions and display name) without a network fetch. Snapshot to a
-    // plain object first — the reactive $state proxy is not structured-cloneable, so it would fail
-    // the IndexedDB write and fall back to a localStorage entry that loadProfile never reads.
-    void saveProfile($state.snapshot(app.profile));
     // The live interface language follows the device — the explicit local choice (saved in
     // prefs) or the system guess made at bootstrap — and is no longer overridden from the
     // account here: the Telegram bot a user signs in through must not dictate the UI, so a
@@ -558,74 +538,6 @@ async function adoptSession(s: Session): Promise<void> {
   void refreshNotifications();
 }
 
-// The cold-start "no connection — go offline?" dialog. bootstrap raises it and awaits the choice
-// here; App.svelte's dialog buttons call resolveOfflinePrompt.
-const BOOT_REACHABILITY_TIMEOUT_MS = 3000;
-let offlinePromptResolve: ((goOffline: boolean) => void) | null = null;
-
-/** resolveOfflinePrompt answers the cold-start "no connection — go offline?" dialog (App.svelte). */
-export function resolveOfflinePrompt(goOffline: boolean): void {
-  app.offlinePrompt = false;
-  const resolve = offlinePromptResolve;
-  offlinePromptResolve = null;
-  resolve?.(goOffline);
-}
-
-/** promptOfflineChoice raises the dialog and resolves to the player's choice (true = go offline). */
-function promptOfflineChoice(): Promise<boolean> {
-  app.offlinePrompt = true;
-  return new Promise<boolean>((resolve) => {
-    offlinePromptResolve = resolve;
-  });
-}
-
-/**
- * initNetworkReactivity reacts to mid-session network changes (e.g. the player toggling flight mode):
- * losing the network interface enters offline mode automatically (session-only); regaining it
- * verifies the gateway is really reachable (an interface being up does not guarantee it) and returns
- * to online — but only if the offline was auto. A deliberate offline (the Settings toggle or the
- * cold-start dialog) is left as the player's choice. These are passive OS events — no polling, no
- * battery cost. Web-only and skipped in the mock (the e2e drives connectivity directly).
- */
-// While in auto-offline, poll for the network to return so the app comes back online — robust to the
-// unreliable `online` event (which often does not fire in an installed PWA). Each tick is cheap: it
-// reads navigator.onLine (no radio) and only hits the network (a reachability check) when the
-// interface is actually up, so while flight mode is on it costs nothing. The poll runs ONLY in
-// auto-offline (a deliberate offline is the player's choice) and stops on returning online.
-let recoveryTimer: ReturnType<typeof setTimeout> | null = null;
-export function scheduleRecovery(delayMs: number): void {
-  if (recoveryTimer) {
-    clearTimeout(recoveryTimer);
-    recoveryTimer = null;
-  }
-  if (typeof window === 'undefined' || !offlineMode.active || !offlineMode.auto) return;
-  recoveryTimer = setTimeout(async () => {
-    recoveryTimer = null;
-    if (!offlineMode.active || !offlineMode.auto) return;
-    const interfaceUp = typeof navigator === 'undefined' || navigator.onLine;
-    if (interfaceUp && (await checkReachable(BOOT_REACHABILITY_TIMEOUT_MS))) {
-      if (offlineMode.active && offlineMode.auto) setOfflineMode(false);
-      return;
-    }
-    scheduleRecovery(4000);
-  }, delayMs);
-}
-
-export function initNetworkReactivity(): void {
-  if (typeof window === 'undefined' || import.meta.env.MODE === 'mock') return;
-  window.addEventListener('offline', () => {
-    if (!offlineMode.active) {
-      setOfflineMode(true, false); // auto (session)
-      scheduleRecovery(4000); // poll for the network to return
-    }
-  });
-  // The online event, when it fires, just kicks an immediate reachability check; the poll above is
-  // the reliable fallback for platforms where it does not fire.
-  window.addEventListener('online', () => {
-    if (offlineMode.active && offlineMode.auto) scheduleRecovery(0);
-  });
-}
-
 /**
  * applyLinkResult applies a completed account link or merge: it adopts a
  * switched session (a guest initiator whose durable counterpart won, so the active
@@ -725,37 +637,17 @@ function syncTelegramSafeArea(): void {
   root.classList.toggle('tg-fullscreen', top > 0);
 }
 
-// The soft-keyboard height threshold (px) that distinguishes an open keyboard from browser chrome
-// (an address bar shrinks the visual viewport by far less), used to gate the focus-into-view scroll.
-const KEYBOARD_MIN_PX = 120;
-
 /**
- * syncViewport mirrors the visual viewport into CSS vars so the pinned app-shell (app.css
- * `html.app-shell body`) both FITS (`--vvh`) and FOLLOWS (`--vv-top`) the visible area above the soft
- * keyboard. iOS Safari / WKWebView does not shrink the layout viewport for the keyboard (Android
- * Chrome does); instead the visual viewport shrinks AND offsets down to reveal the focused field, and
- * those values do not always cleanly revert. Tracking only the height left the top-anchored shell
- * misaligned on iOS — empty space below the content, worst on a repeat focus; tracking offsetTop too
- * keeps the shell on the visible area on every platform. On the keyboard-OPEN transition it also
- * scrolls the focused field into view, since iOS does not reliably scroll a pinned document to it.
+ * syncViewportHeight mirrors the visual-viewport height into the --vvh CSS var so a screen can
+ * fit the visible area above an open soft keyboard (iOS does not shrink dvh for the keyboard).
+ * On a screen whose input sits at the bottom (chat, word-check) this keeps the input visible
+ * without the page scrolling, so the layout no longer jumps when the keyboard appears.
  */
-let keyboardOpen = false;
-function syncViewport(): void {
+function syncViewportHeight(): void {
   if (typeof document === 'undefined') return;
-  const win = typeof window !== 'undefined' ? window : null;
-  const vv = win ? win.visualViewport : null;
-  const h = vv ? vv.height : win ? win.innerHeight : 0;
-  const top = vv ? vv.offsetTop : 0;
+  const vv = typeof window !== 'undefined' ? window.visualViewport : null;
+  const h = vv ? vv.height : typeof window !== 'undefined' ? window.innerHeight : 0;
   if (h > 0) document.documentElement.style.setProperty('--vvh', `${h}px`);
-  document.documentElement.style.setProperty('--vv-top', `${top}px`);
-  const open = !!vv && !!win && win.innerHeight - h > KEYBOARD_MIN_PX;
-  if (open && !keyboardOpen) {
-    const el = document.activeElement;
-    if (el instanceof HTMLElement && (el.tagName === 'INPUT' || el.tagName === 'TEXTAREA')) {
-      requestAnimationFrame(() => el.scrollIntoView({ block: 'center' }));
-    }
-  }
-  keyboardOpen = open;
 }
 
 /**
@@ -815,23 +707,11 @@ export async function bootstrap(): Promise<void> {
     setLocale(guess);
   }
 
-  // Track the visual viewport (height + offset) so screens fit and follow the visible area above an
-  // open soft keyboard (--vvh / --vv-top). Both resize AND scroll fire on iOS when the keyboard moves
-  // the visual viewport.
-  syncViewport();
+  // Track the visual-viewport height so screens fit above an open soft keyboard (--vvh).
+  syncViewportHeight();
   if (typeof window !== 'undefined' && window.visualViewport) {
-    window.visualViewport.addEventListener('resize', syncViewport);
-    window.visualViewport.addEventListener('scroll', syncViewport);
-  }
-
-  // Enter on a single-line <input> dismisses the soft keyboard (blur): the keyboard's default
-  // return/"Go" key otherwise does nothing on a bare input, which reads as stuck. A <textarea> (the
-  // feedback form) is excluded so Enter still inserts a newline; a form's own Enter→submit still
-  // fires first (this listener is on the document, so it runs after the field's own handler).
-  if (typeof document !== 'undefined') {
-    document.addEventListener('keydown', (e) => {
-      if (e.key === 'Enter' && e.target instanceof HTMLInputElement) e.target.blur();
-    });
+    window.visualViewport.addEventListener('resize', syncViewportHeight);
+    window.visualViewport.addEventListener('scroll', syncViewportHeight);
   }
 
   // Load the Telegram Mini App SDK dynamically, with a timeout, on a Telegram entry — it is no
@@ -903,65 +783,11 @@ export async function bootstrap(): Promise<void> {
     return;
   }
 
-  // On the plain web (both Mini-App branches returned above) register the install-only service
-  // worker so the app is installable — Chromium needs a registered SW, notably on Android. Web-only
-  // and skipped in the mock build; see lib/pwa.svelte.
-  registerServiceWorker();
-  // React to mid-session network changes (e.g. flight mode) for the rest of the session.
-  initNetworkReactivity();
-
-  // Deliberate offline mode carried over from a prior session: with no network the session adoption
-  // + profile fetch below would hang the splash, so skip them and launch straight from the cached
-  // session + profile into the offline lobby. Without a cached profile (e.g. storage cleared) fall
-  // through to the normal online flow but KEEP the sticky flag — the mode is the player's choice, and
-  // an online boot re-persists the profile so the next launch goes offline. (A truly offline launch
-  // with no cached profile is unreachable: enabling offline requires a prior online session.)
-  if (offlineMode.active) {
-    const [offlineSession, offlineProfile] = await Promise.all([loadSession(), loadProfile()]);
-    if (shouldBootOffline({ offlineActive: true, hasSession: !!offlineSession, hasProfile: !!offlineProfile })) {
-      gateway.setToken(offlineSession!.token);
-      app.session = offlineSession!;
-      app.profile = offlineProfile!;
-      if (router.route.name === 'login' || router.route.name === 'confirm') navigate('/');
-      app.ready = true;
-      return;
-    }
-  }
-
   const saved = await loadSession();
   // A VK ID web-link callback (?code&device_id&state) rides the URL after the redirect back
   // from VK; capture and clear it here (it needs the restored session to link against).
   const vkcb = pendingVKLink();
   if (saved) {
-    // Cold-start network auto-detect (deliberate offline is handled above). With a cached profile to
-    // fall back on and no pending VK-link, do not hang on adoptSession's retrying profile fetch when
-    // the network is down: a device with no network interface goes offline for the session (no
-    // dialog); an interface that is up but cannot reach the gateway within a short window asks the
-    // player. Web-only reaches here (the Mini-App branches returned above), so isStandalone gates it.
-    const cachedProfile = await loadProfile();
-    const canOffline = !!cachedProfile && !vkcb && isStandalone() && !!cachedProfile.email;
-    if (canOffline) {
-      const interfaceOffline = typeof navigator !== 'undefined' && navigator.onLine === false;
-      gateway.setToken(saved.token);
-      const reachable = interfaceOffline ? false : await checkReachable(BOOT_REACHABILITY_TIMEOUT_MS);
-      if (!reachable) {
-        // No network interface → go offline for the session (no dialog); interface up but the
-        // gateway is unreachable → ambiguous, so ask.
-        const goOffline = interfaceOffline ? true : await promptOfflineChoice();
-        if (goOffline) {
-          // A deliberate dialog choice is sticky; an auto (no-interface) offline is session-only.
-          setOfflineMode(true, !interfaceOffline);
-          if (interfaceOffline) scheduleRecovery(4000); // auto-offline: poll for the network to return
-          app.session = saved;
-          app.profile = cachedProfile;
-          if (router.route.name === 'login' || router.route.name === 'confirm') navigate('/');
-          app.ready = true;
-          return;
-        }
-        // "Нет" — keep trying online: fall through to adoptSession (it retries; the connection
-        // watcher shows "Connecting…").
-      }
-    }
     await adoptSession(saved);
     if (vkcb) {
       // The full-page redirect lost the in-app route, so hand the callback to Profile, which
@@ -1148,7 +974,7 @@ export async function loginGuest(): Promise<void> {
 
 export async function requestEmailCode(email: string): Promise<boolean> {
   try {
-    await gateway.authEmailRequest(email, app.locale, isStandalone());
+    await gateway.authEmailRequest(email, app.locale);
     return true;
   } catch (err) {
     handleError(err);
@@ -1190,7 +1016,6 @@ export async function logout(): Promise<void> {
   app.splashDone = false;
   gateway.setToken(null);
   await clearSession();
-  await clearProfile();
   app.session = null;
   app.profile = null;
   navigate('/login');
@@ -1342,11 +1167,4 @@ if (import.meta.env.MODE === 'mock' && typeof window !== 'undefined') {
     closeStream();
     app.blocked = { blocked: true, permanent: true, until: '', reason: '', ...b };
   };
-  // Expose the router so the e2e can assert navigate() updates the route synchronously (no
-  // hashchange lag): a route that trailed the hash for a frame let bootstrap's `app.ready` flip
-  // render the previous route under the new screen (the empty-hash lobby flashing under login).
-  (window as unknown as { __router?: { navigate(p: string): void; route(): string } }).__router = {
-    navigate,
-    route: () => router.route.name,
-  };
 }

ui/src/lib/client.ts

@@ -65,7 +65,7 @@ export interface GatewayClient {
    *  cosmetic seed for a brand-new account). */
   authVK(params: string, displayName: string): Promise<Session>;
   authGuest(locale?: string): Promise<Session>;
-  authEmailRequest(email: string, language: string, pwa: boolean): Promise<void>;
+  authEmailRequest(email: string, language: string): Promise<void>;
   authEmailLogin(email: string, code: string): Promise<Session>;
   /** Confirm a one-tap email deeplink token: a login returns a session to adopt; a
    *  link returns a status ('confirmed' | 'merge_required'). */

ui/src/lib/codec.test.ts

@@ -122,11 +122,10 @@ describe('codec', () => {
     expect(guest.browserTz()).toBe('-05:30');
 
     const email = fb.EmailRequestRequest.getRootAsEmailRequestRequest(
-      new ByteBuffer(encodeEmailRequest('a@example.com', '+00:00', 'en', true)),
+      new ByteBuffer(encodeEmailRequest('a@example.com', '+00:00', 'en')),
     );
     expect(email.email()).toBe('a@example.com');
     expect(email.browserTz()).toBe('+00:00');
-    expect(email.pwa()).toBe(true);
     expect(email.language()).toBe('en');
 
     const confirm = fb.EmailConfirmLinkRequest.getRootAsEmailConfirmLinkRequest(
@@ -712,28 +711,6 @@ describe('codec', () => {
     expect(decodeProfile(b.asUint8Array()).variantPreferences).toEqual(['erudit_ru', 'scrabble_en']);
   });
 
-  it('decodes the profile dictionary versions into a per-variant map', () => {
-    const b = new Builder(128);
-    const uid = b.createString('u-1');
-    const en = fb.DictVersion.createDictVersion(b, b.createString('scrabble_en'), b.createString('v1.3.0'));
-    const er = fb.DictVersion.createDictVersion(b, b.createString('erudit_ru'), b.createString('v1.2.0'));
-    const vec = fb.Profile.createDictVersionsVector(b, [en, er]);
-    fb.Profile.startProfile(b);
-    fb.Profile.addUserId(b, uid);
-    fb.Profile.addDictVersions(b, vec);
-    b.finish(fb.Profile.endProfile(b));
-    expect(decodeProfile(b.asUint8Array()).dictVersions).toEqual({ scrabble_en: 'v1.3.0', erudit_ru: 'v1.2.0' });
-  });
-
-  it('decodes an absent dict_versions vector to an empty map', () => {
-    const b = new Builder(64);
-    const uid = b.createString('u-1');
-    fb.Profile.startProfile(b);
-    fb.Profile.addUserId(b, uid);
-    b.finish(fb.Profile.endProfile(b));
-    expect(decodeProfile(b.asUint8Array()).dictVersions).toEqual({});
-  });
-
   it('encodes the update-profile variant preferences', () => {
     const buf = encodeUpdateProfile({
       displayName: 'Kaya',

ui/src/lib/codec.ts

@@ -214,12 +214,7 @@ export function encodeGuestLogin(locale: string, browserTz: string): Uint8Array
   return finish(b, fb.GuestLoginRequest.endGuestLoginRequest(b));
 }
 
-export function encodeEmailRequest(
-  email: string,
-  browserTz: string,
-  language: string,
-  pwa: boolean,
-): Uint8Array {
+export function encodeEmailRequest(email: string, browserTz: string, language: string): Uint8Array {
   const b = new Builder(128);
   const e = b.createString(email);
   const tz = b.createString(browserTz);
@@ -228,7 +223,6 @@ export function encodeEmailRequest(
   fb.EmailRequestRequest.addEmail(b, e);
   fb.EmailRequestRequest.addBrowserTz(b, tz);
   fb.EmailRequestRequest.addLanguage(b, l);
-  fb.EmailRequestRequest.addPwa(b, pwa);
   return finish(b, fb.EmailRequestRequest.endEmailRequestRequest(b));
 }
 
@@ -364,25 +358,9 @@ export function decodeProfile(buf: Uint8Array): Profile {
     email: s(p.email()),
     telegramLinked: p.telegramLinked(),
     vkLinked: p.vkLinked(),
-    dictVersions: decodeDictVersions(p),
   };
 }
 
-// decodeDictVersions reads the profile's per-variant current dictionary versions into a
-// variant-keyed map, so the offline preloader can look up the version for each enabled
-// variant. An entry with an unknown variant or empty version is skipped.
-function decodeDictVersions(p: fb.Profile): Partial<Record<Variant, string>> {
-  const out: Partial<Record<Variant, string>> = {};
-  for (let i = 0; i < p.dictVersionsLength(); i++) {
-    const dv = p.dictVersions(i);
-    if (!dv) continue;
-    const variant = s(dv.variant()) as Variant;
-    const version = s(dv.version());
-    if (variant && version) out[variant] = version;
-  }
-  return out;
-}
-
 // decodeVariantPreferences reads the Profile.variant_preferences vector (the variants
 // the player enabled in Settings).
 function decodeVariantPreferences(p: fb.Profile): Variant[] {
@@ -461,7 +439,6 @@ function decodeStateViewTable(v: fb.StateView): StateView {
     bagLen: v.bagLen(),
     hintsRemaining: v.hintsRemaining(),
     walletBalance: v.walletBalance(),
-    hintUnlockLeftSeconds: v.hintUnlockLeftSeconds(),
   };
 }
 

ui/src/lib/connection.svelte.ts

@@ -9,7 +9,6 @@
 // other traffic is in flight.
 
 import { backoffMs } from './retry';
-import { offlineMode } from './offline.svelte';
 
 let online = $state(true);
 let watchTimer: ReturnType<typeof setTimeout> | null = null;
@@ -28,24 +27,6 @@ export function registerProbe(fn: () => Promise<void>): void {
   probe = fn;
 }
 
-/**
- * checkReachable runs the reachability probe once, bounded by timeoutMs, and reports whether the
- * gateway answered — a single attempt (no retry loop), for the cold-start network decision — while
- * updating the online signal. It reports false when no probe is registered or the timeout wins.
- */
-export async function checkReachable(timeoutMs: number): Promise<boolean> {
-  if (!probe) return false;
-  try {
-    await Promise.race([
-      probe(),
-      new Promise<never>((_, reject) => setTimeout(() => reject(new Error('reachability timeout')), timeoutMs)),
-    ]);
-    return true;
-  } catch {
-    return false;
-  }
-}
-
 /** reportOnline marks the gateway reachable and stops the watcher. */
 export function reportOnline(): void {
   online = true;
@@ -70,9 +51,7 @@ function scheduleProbe(attempt: number): void {
   watchTimer = setTimeout(
     () => {
       watchTimer = null;
-      // Never probe the network in offline mode (the kill switch); the online/offline events drive
-      // recovery there instead.
-      if (online || !probe || offlineMode.active) return;
+      if (online || !probe) return;
       probe().then(reportOnline, () => scheduleProbe(Math.min(attempt + 1, 6)));
     },
     backoffMs(attempt),

ui/src/lib/dict/dawg.cursor.test.ts

@@ -1,68 +0,0 @@
-import { describe, it, expect } from 'vitest';
-import { readFileSync } from 'node:fs';
-import { Dawg } from './dawg';
-
-// The step-by-step DAWG cursor (root/final/next/arcs) is the primitive the move
-// generator walks. These fast unit tests pin it against a small committed sample
-// dictionary (backend/cmd/movegen); the full parity vs the Go solver lands with
-// the generator's conformance fixtures.
-const bytes = new Uint8Array(readFileSync(new URL('./testdata/sample_en.dawg', import.meta.url)));
-const fixture = JSON.parse(
-  readFileSync(new URL('./testdata/sample_en.words.json', import.meta.url), 'utf8'),
-) as { numAdded: number; words: string[]; indexes: number[][] };
-
-const key = (w: number[]): string => w.join(',');
-
-// enumerateWords walks the whole automaton depth-first, collecting the index path
-// at every accepting node — i.e. every stored word.
-function enumerateWords(d: Dawg): number[][] {
-  const out: number[][] = [];
-  const path: number[] = [];
-  const visit = (node: number): void => {
-    d.arcs(node, (label, dest, final) => {
-      path.push(label);
-      if (final) out.push(path.slice());
-      visit(dest);
-      path.pop();
-      return true;
-    });
-  };
-  if (d.final(d.root())) out.push([]);
-  visit(d.root());
-  return out;
-}
-
-describe('dawg cursor', () => {
-  it('parses the sample fixture', () => {
-    const d = new Dawg(bytes);
-    expect(d.numAdded).toBe(fixture.numAdded);
-  });
-
-  it('root is not an accepting state (the sample has no empty word)', () => {
-    const d = new Dawg(bytes);
-    expect(d.final(d.root())).toBe(false);
-  });
-
-  it('enumerates exactly the stored words', () => {
-    const d = new Dawg(bytes);
-    const got = enumerateWords(d).map(key).sort();
-    const want = fixture.indexes.map(key).sort();
-    expect(got).toEqual(want);
-  });
-
-  it('next walks a stored word to an accepting node and rejects a non-edge', () => {
-    const d = new Dawg(bytes);
-    let node = d.root();
-    for (const ch of [2, 0, 17, 4, 3]) {
-      // "cared"
-      node = d.next(node, ch);
-      expect(node).toBeGreaterThanOrEqual(0);
-    }
-    expect(d.final(node)).toBe(true);
-    // "care" (index [2,0,17,4]) is an internal accepting node on the way to "cared".
-    const care = [2, 0, 17, 4].reduce((n, ch) => d.next(n, ch), d.root());
-    expect(d.final(care)).toBe(true);
-    // No stored word starts with 'z' (index 25).
-    expect(d.next(d.root(), 25)).toBe(-1);
-  });
-});

ui/src/lib/dict/dawg.ts

@@ -95,85 +95,6 @@ export class Dawg {
     return this.indexOf(word) >= 0;
   }
 
-  // --- Step-by-step traversal (the move generator's primitive) ---------------
-  //
-  // A `Node` is a bit offset into the graph; 0 denotes the root (which resolves
-  // to firstNodeOffset). These mirror dafsa's traverse.go Cursor (Root/Final/
-  // Next/Arcs) over the same bitstream this reader already decodes, so the ported
-  // generator can drive the automaton one transition at a time. Single-threaded
-  // JS shares this reader's position across calls; every method re-seeks to its
-  // node on entry, and arcs brackets the callback with a save/restore, so nested
-  // use during a walk is safe. Mirrors dafsa (*Cursor).
-
-  /** root returns the start state of the automaton. */
-  root(): number {
-    return 0;
-  }
-
-  /** final reports whether node is an accepting state (a stored word ends there). */
-  final(node: number): boolean {
-    if (this.numEdges <= 0) {
-      return this.hasEmptyWord && node === 0;
-    }
-    this.p = node === 0 ? this.firstNodeOffset : node;
-    return this.readBits(1) === 1;
-  }
-
-  /**
-   * next follows the edge labelled ch (an alphabet index) from node, returning the
-   * destination node, or -1 when no such edge exists.
-   */
-  next(node: number, ch: number): number {
-    return this.getEdge(node, ch) ? this.eNode : -1;
-  }
-
-  /**
-   * arcs calls fn for each out-edge of node in ascending label order, passing the
-   * edge's label, its destination node and whether that destination is accepting.
-   * It stops early if fn returns false. Mirrors dafsa (*Cursor).Arcs.
-   */
-  arcs(node: number, fn: (label: number, dest: number, final: boolean) => boolean): void {
-    if (this.numEdges <= 0) {
-      return;
-    }
-    this.p = node === 0 ? this.firstNodeOffset : node;
-    this.readBits(1); // node final flag — not needed here
-    const fallthrough = this.readBits(1);
-
-    if (fallthrough === 1) {
-      const label = this.readBits(this.cbits);
-      // The reader now sits at the destination node, whose first bit is its final flag.
-      const dest = this.p;
-      const final = this.readBits(1) === 1;
-      fn(label, dest, final);
-      return;
-    }
-
-    const nskiplen = bitsLen(this.wbits);
-    let nskip = 0;
-    let numEdges = 1;
-    if (this.readBits(1) !== 1) {
-      // not a single edge
-      numEdges = this.readUnsigned();
-      nskip = this.readBits(nskiplen);
-    }
-
-    for (let i = 0; i < numEdges; i++) {
-      const label = this.readBits(this.cbits);
-      if (i > 0) {
-        this.readBits(nskip); // per-edge skip count, unused for traversal
-      }
-      const dest = this.readBits(this.abits);
-      const resume = this.p;
-      this.p = dest;
-      const final = this.readBits(1) === 1;
-      if (!fn(label, dest, final)) {
-        return;
-      }
-      this.p = resume;
-    }
-  }
-
   // getEdge resolves the outgoing edge for ch from the node at the given bit
   // offset. On success it fills eNode/eCount/eFinal and returns true. Mirrors
   // dafsa (*dawg).getEdge.

ui/src/lib/dict/generate.parity.test.ts

@@ -1,99 +0,0 @@
-import { describe, it, expect } from 'vitest';
-import { readFileSync } from 'node:fs';
-import { Dawg } from './dawg';
-import { generateMoves, GenRack, type GenBoard, type Mode } from './generate';
-import type { Ruleset } from './validate';
-
-// Conformance gate for the ported move generator: for each committed position it must
-// return exactly the ranked play list the real Go solver returns (backend/cmd/movegen).
-// The Russian sample reaches alphabet index 32, exercising the 33-letter cross-set.
-
-interface Tile {
-  row: number;
-  col: number;
-  letter: number;
-  blank: boolean;
-}
-interface GenMove {
-  dir: number;
-  tiles: Tile[];
-  score: number;
-}
-interface Fixture {
-  ruleset: {
-    size: number;
-    cols: number;
-    center: number;
-    rackSize: number;
-    bingo: number;
-    values: number[];
-    letterMult: number[][];
-    wordMult: number[][];
-  };
-  cases: {
-    name: string;
-    placed: Tile[] | null;
-    rack: { letters: number[]; blanks: number };
-    mode: number;
-    ignoreCrossWords: boolean;
-    moves: GenMove[];
-  }[];
-}
-
-function load(tag: string): { dawg: Dawg; fx: Fixture } {
-  const bytes = new Uint8Array(readFileSync(new URL(`./testdata/sample_${tag}.dawg`, import.meta.url)));
-  const fx = JSON.parse(
-    readFileSync(new URL(`./testdata/sample_${tag}.gen.json`, import.meta.url), 'utf8'),
-  ) as Fixture;
-  return { dawg: new Dawg(bytes), fx };
-}
-
-function buildBoard(placed: Tile[], cols: number): GenBoard {
-  const grid: ({ letter: number; blank: boolean } | null)[] = new Array(cols * cols).fill(null);
-  for (const t of placed) grid[t.row * cols + t.col] = { letter: t.letter, blank: t.blank };
-  const inBounds = (r: number, c: number): boolean => r >= 0 && r < cols && c >= 0 && c < cols;
-  return {
-    rows: cols,
-    cols,
-    inBounds,
-    filled: (r, c) => inBounds(r, c) && grid[r * cols + c] !== null,
-    cellAt: (r, c) => grid[r * cols + c]!,
-    isEmpty: () => placed.length === 0,
-  };
-}
-
-function rulesetFor(fx: Fixture, ignoreCrossWords: boolean): Ruleset {
-  const r = fx.ruleset;
-  return {
-    cols: r.cols,
-    center: r.center,
-    rackSize: r.rackSize,
-    bingo: r.bingo,
-    values: r.values,
-    letterMult: (row, col) => r.letterMult[row][col],
-    wordMult: (row, col) => r.wordMult[row][col],
-    ignoreCrossWords,
-  };
-}
-
-// sig is an order-stable signature of a move: orientation, score and its placed tiles
-// sorted by square — so two lists compare equal iff they rank the same plays the same way.
-function sig(m: GenMove): string {
-  const ts = m.tiles.slice().sort((a, b) => (a.row !== b.row ? a.row - b.row : a.col - b.col));
-  return `${m.dir}#${m.score}#` + ts.map((t) => `${t.row},${t.col},${t.letter}${t.blank ? '*' : ''}`).join(';');
-}
-
-for (const tag of ['en', 'ru']) {
-  describe(`move generator parity vs Go solver (${tag})`, () => {
-    const { dawg, fx } = load(tag);
-    for (const c of fx.cases) {
-      it(c.name, () => {
-        const board = buildBoard(c.placed ?? [], fx.ruleset.cols);
-        const rack = GenRack.from(fx.ruleset.size, c.rack.letters, c.rack.blanks);
-        const rs = rulesetFor(fx, c.ignoreCrossWords);
-        const got = generateMoves(dawg, board, rack, rs, c.mode as Mode);
-        expect(got.map(sig)).toEqual(c.moves.map(sig));
-      });
-    }
-  });
-}

ui/src/lib/dict/generate.realparity.test.ts

@@ -1,113 +0,0 @@
-import { describe, it, expect } from 'vitest';
-import { readFileSync, existsSync } from 'node:fs';
-import { join } from 'node:path';
-import { Dawg } from './dawg';
-import { generateMoves, GenRack, type GenBoard, type Mode } from './generate';
-import type { Ruleset } from './validate';
-
-// Full-dictionary conformance for the ported move generator: for positions over the real
-// shipped dictionaries (deep graphs and full 26/33-letter alphabets the tiny committed
-// samples cannot reach) it must return exactly the ranked list the Go solver does. The
-// golden vectors come from `go run ./backend/cmd/movegen -dawg-dir <dawg> -out <dir>` and
-// the CI conformance job wires the two directories in; the suite skips when they are unset.
-const dawgDir = process.env.DICT_DAWG_DIR;
-const goldDir = process.env.DICT_MOVEGEN_DIR;
-const ready = !!dawgDir && !!goldDir && existsSync(dawgDir) && existsSync(goldDir);
-
-// variant -> the release dawg file name (matches dawg.parity.test.ts / the movegen tool).
-const variants = [
-  { variant: 'scrabble_en', dawg: 'en_sowpods' },
-  { variant: 'scrabble_ru', dawg: 'ru_scrabble' },
-  { variant: 'erudit_ru', dawg: 'ru_erudit' },
-];
-
-interface Tile {
-  row: number;
-  col: number;
-  letter: number;
-  blank: boolean;
-}
-interface GenMove {
-  dir: number;
-  tiles: Tile[];
-  score: number;
-}
-interface Fixture {
-  ruleset: {
-    size: number;
-    cols: number;
-    center: number;
-    rackSize: number;
-    bingo: number;
-    values: number[];
-    letterMult: number[][];
-    wordMult: number[][];
-  };
-  cases: {
-    name: string;
-    placed: Tile[] | null;
-    rack: { letters: number[]; blanks: number };
-    mode: number;
-    ignoreCrossWords: boolean;
-    moves: GenMove[];
-  }[];
-}
-
-function buildBoard(placed: Tile[], cols: number): GenBoard {
-  const grid: ({ letter: number; blank: boolean } | null)[] = new Array(cols * cols).fill(null);
-  for (const t of placed) grid[t.row * cols + t.col] = { letter: t.letter, blank: t.blank };
-  const inBounds = (r: number, c: number): boolean => r >= 0 && r < cols && c >= 0 && c < cols;
-  return {
-    rows: cols,
-    cols,
-    inBounds,
-    filled: (r, c) => inBounds(r, c) && grid[r * cols + c] !== null,
-    cellAt: (r, c) => grid[r * cols + c]!,
-    isEmpty: () => placed.length === 0,
-  };
-}
-
-function rulesetFor(fx: Fixture, ignoreCrossWords: boolean): Ruleset {
-  const r = fx.ruleset;
-  return {
-    cols: r.cols,
-    center: r.center,
-    rackSize: r.rackSize,
-    bingo: r.bingo,
-    values: r.values,
-    letterMult: (row, col) => r.letterMult[row][col],
-    wordMult: (row, col) => r.wordMult[row][col],
-    ignoreCrossWords,
-  };
-}
-
-function sig(m: GenMove): string {
-  const ts = m.tiles.slice().sort((a, b) => (a.row !== b.row ? a.row - b.row : a.col - b.col));
-  return `${m.dir}#${m.score}#` + ts.map((t) => `${t.row},${t.col},${t.letter}${t.blank ? '*' : ''}`).join(';');
-}
-
-describe.skipIf(!ready)('move generator parity vs Go on the real dictionaries', () => {
-  for (const v of variants) {
-    describe(v.variant, () => {
-      // Guard the collection-time reads: the block is skipped when the dirs are unset, but
-      // the describe callback still runs to register tests, so touch the filesystem only
-      // when ready (otherwise join(undefined, …) would throw during a normal unit run).
-      if (!ready) return;
-      const fx = JSON.parse(readFileSync(join(goldDir!, `${v.variant}.movegen.json`), 'utf8')) as Fixture;
-      const dawg = new Dawg(new Uint8Array(readFileSync(join(dawgDir!, `${v.dawg}.dawg`))));
-      for (const c of fx.cases) {
-        it(
-          c.name,
-          () => {
-            const board = buildBoard(c.placed ?? [], fx.ruleset.cols);
-            const rack = GenRack.from(fx.ruleset.size, c.rack.letters, c.rack.blanks);
-            const rs = rulesetFor(fx, c.ignoreCrossWords);
-            const got = generateMoves(dawg, board, rack, rs, c.mode as Mode);
-            expect(got.map(sig)).toEqual(c.moves.map(sig));
-          },
-          60_000,
-        );
-      }
-    });
-  }
-});

ui/src/lib/dict/generate.ts

@@ -1,418 +0,0 @@
-// Local move generator: every legal play for a rack on a board, ranked by
-// descending score. Ported from the scrabble-solver engine — the Appel-Jacobson
-// two-phase algorithm (LeftPart then ExtendRight) over a plain left-to-right DAWG
-// (scrabble/gen_dawg.go, gen.go, crossset.go, solver.go, key.go). It walks the DAWG
-// with the cursor from dawg.ts and scores each play with evaluate() from validate.ts,
-// so the whole robot brain runs on-device. Faithfulness to the Go solver is pinned by
-// generate.parity.test.ts against golden fixtures (backend/cmd/movegen).
-//
-// Everything works in alphabet-index space, mirroring the Go engine. A letterSet is
-// a per-square cross-set (the letters that form a legal perpendicular word there);
-// it is a boolean membership array rather than a uint64, so alphabet indexes past
-// JS's 31-bit shift boundary (Russian has 33 letters) are handled exactly.
-
-import { Dawg } from './dawg';
-import {
-  evaluate,
-  connected,
-  Horizontal,
-  Vertical,
-  type Board,
-  type Ruleset,
-  type Move,
-  type Placement,
-  type Direction,
-} from './validate';
-
-/** Both generates across plays (on the board) and down plays (on its transpose). */
-export const Both = 0;
-/** OnlyHorizontal generates across plays only. */
-export const OnlyHorizontal = 1;
-/** OnlyVertical generates down plays only (Эрудит plays a single orientation per turn). */
-export const OnlyVertical = 2;
-export type Mode = typeof Both | typeof OnlyHorizontal | typeof OnlyVertical;
-
-function modeIncludes(mode: Mode, dir: Direction): boolean {
-  if (mode === Both) return true;
-  if (mode === OnlyHorizontal) return dir === Horizontal;
-  return dir === Vertical;
-}
-
-/**
- * GenBoard is the board view the generator needs: the validator's read view plus the
- * dimensions it iterates over. The whole board is square, so a transposed view (below)
- * satisfies the same shape.
- */
-export interface GenBoard extends Board {
-  rows: number;
-  cols: number;
-}
-
-/**
- * GenRack is a rack as per-letter tile counts plus a blank slot, mirroring
- * scrabble-solver/rack. The generator mutates a single rack in place — removing a
- * tile, recursing, putting it back — so the operations are O(1) and allocation-free.
- */
-export class GenRack {
-  private readonly counts: Int32Array;
-
-  /** Construct an empty rack for an alphabet of the given size (a trailing blank slot). */
-  constructor(size: number) {
-    this.counts = new Int32Array(size + 1);
-  }
-
-  /** from builds a rack from a multiset of letter indexes plus a blank count. */
-  static from(size: number, letters: readonly number[], blanks: number): GenRack {
-    const r = new GenRack(size);
-    for (const l of letters) r.counts[l]++;
-    r.counts[size] += blanks;
-    return r;
-  }
-
-  /** has reports whether at least one tile of the letter index is on the rack. */
-  has(letter: number): boolean {
-    return this.counts[letter] > 0;
-  }
-  /** blanks returns how many blank tiles are on the rack. */
-  blanks(): number {
-    return this.counts[this.counts.length - 1];
-  }
-  remove(letter: number): void {
-    this.counts[letter]--;
-  }
-  add(letter: number): void {
-    this.counts[letter]++;
-  }
-  removeBlank(): void {
-    this.counts[this.counts.length - 1]--;
-  }
-  addBlank(): void {
-    this.counts[this.counts.length - 1]++;
-  }
-  /** clone returns an independent copy. */
-  clone(): GenRack {
-    const c = new GenRack(this.counts.length - 1);
-    c.counts.set(this.counts);
-    return c;
-  }
-}
-
-// --- cross-sets ------------------------------------------------------------------
-//
-// A LetterSet is membership over alphabet letter indexes. Mirrors scrabble.letterSet
-// (a uint64) but as a Uint8Array so index 32 (Russian) is exact under JS bit ops.
-type LetterSet = Uint8Array;
-
-function fullSet(size: number): LetterSet {
-  return new Uint8Array(size).fill(1);
-}
-
-// walk follows word (alphabet indexes) left to right from the root; -1 if it derails.
-function walk(dawg: Dawg, word: readonly number[]): number {
-  let n = dawg.root();
-  for (const l of word) {
-    n = dawg.next(n, l);
-    if (n < 0) return -1;
-  }
-  return n;
-}
-
-// completers returns the letters X (< size) whose arc from state leads directly to an
-// accepting node — the deterministic cross-set primitive. Mirrors scrabble.completers.
-function completers(dawg: Dawg, state: number, size: number): LetterSet {
-  const set = new Uint8Array(size);
-  dawg.arcs(state, (label, _dest, final) => {
-    if (final && label < size) set[label] = 1;
-    return true;
-  });
-  return set;
-}
-
-// dawgCrossSet returns the letters X for which above·X·below is a stored word. Mirrors
-// scrabble.dawgCrossSet: a right extension (no tiles below) just completes the prefix
-// above; a left extension (tiles below) probes each X. above/below are letter indexes.
-function dawgCrossSet(dawg: Dawg, above: number[], below: number[], size: number): LetterSet {
-  if (above.length === 0 && below.length === 0) return fullSet(size);
-  if (below.length === 0) {
-    const node = walk(dawg, above);
-    if (node < 0) return new Uint8Array(size);
-    return completers(dawg, node, size);
-  }
-  let node = dawg.root();
-  if (above.length > 0) {
-    node = walk(dawg, above);
-    if (node < 0) return new Uint8Array(size);
-  }
-  const set = new Uint8Array(size);
-  for (let x = 0; x < size; x++) {
-    let m = dawg.next(node, x);
-    if (m < 0) continue;
-    let ok = true;
-    for (const l of below) {
-      m = dawg.next(m, l);
-      if (m < 0) {
-        ok = false;
-        break;
-      }
-    }
-    if (ok && dawg.final(m)) set[x] = 1;
-  }
-  return set;
-}
-
-// columnContext returns the contiguous run of filled cells immediately above and below
-// the empty square (r, c), each top to bottom, as letter indexes — the tiles a
-// perpendicular word through (r, c) would include. Mirrors scrabble.columnContext.
-function columnContext(b: GenBoard, r: number, c: number): { above: number[]; below: number[] } {
-  const above: number[] = [];
-  let start = r;
-  while (start - 1 >= 0 && b.filled(start - 1, c)) start--;
-  for (let rr = start; rr < r; rr++) above.push(b.cellAt(rr, c).letter);
-
-  const below: number[] = [];
-  let end = r;
-  while (end + 1 < b.rows && b.filled(end + 1, c)) end++;
-  for (let rr = r + 1; rr <= end; rr++) below.push(b.cellAt(rr, c).letter);
-  return { above, below };
-}
-
-// transpose returns a view of b with rows and columns swapped, so down-play generation
-// runs as across generation. Mirrors board.Transpose (as a lazy view).
-function transpose(b: GenBoard): GenBoard {
-  return {
-    rows: b.cols,
-    cols: b.rows,
-    inBounds: (r, c) => b.inBounds(c, r),
-    filled: (r, c) => b.filled(c, r),
-    cellAt: (r, c) => b.cellAt(c, r),
-    isEmpty: () => b.isEmpty(),
-  };
-}
-
-// A tentatively placed left-part tile; its column is fixed only at record time.
-interface TileInfo {
-  letter: number;
-  blank: boolean;
-}
-
-// AcrossGen carries one across-generation pass over a board. Mirrors scrabble.acrossGen.
-class AcrossGen {
-  private row = 0;
-  private readonly left: TileInfo[] = [];
-  private readonly right: Placement[] = [];
-
-  constructor(
-    private readonly dawg: Dawg,
-    private readonly bd: GenBoard,
-    private readonly rk: GenRack,
-    private readonly cross: (r: number, c: number) => LetterSet,
-    private readonly emit: (placements: Placement[]) => void,
-  ) {}
-
-  generateRow(row: number, firstMove: boolean, centerRow: number, centerCol: number): void {
-    this.row = row;
-    let limit = 0;
-    for (let col = 0; col < this.bd.cols; col++) {
-      if (this.bd.filled(row, col)) {
-        limit = 0;
-        continue;
-      }
-      const anchor = firstMove ? row === centerRow && col === centerCol : this.hasFilledNeighbor(row, col);
-      if (!anchor) {
-        limit++;
-        continue;
-      }
-      this.left.length = 0;
-      this.right.length = 0;
-      if (col > 0 && this.bd.filled(row, col - 1)) {
-        const pre = this.walkPrefix(row, col);
-        if (pre.ok) this.extendRight(pre.node, col, col);
-      } else {
-        this.leftPart(this.dawg.root(), col, limit);
-      }
-      limit = 0;
-    }
-  }
-
-  private hasFilledNeighbor(r: number, c: number): boolean {
-    return this.bd.filled(r - 1, c) || this.bd.filled(r + 1, c) || this.bd.filled(r, c - 1) || this.bd.filled(r, c + 1);
-  }
-
-  // walkPrefix walks the DAWG through the filled run ending at col-1, returning the
-  // node reached and whether that prefix exists. Mirrors scrabble.acrossGen.walkPrefix.
-  private walkPrefix(row: number, col: number): { node: number; ok: boolean } {
-    let start = col - 1;
-    while (start - 1 >= 0 && this.bd.filled(row, start - 1)) start--;
-    let node = this.dawg.root();
-    for (let c = start; c < col; c++) {
-      node = this.dawg.next(node, this.bd.cellAt(row, c).letter);
-      if (node < 0) return { node, ok: false };
-    }
-    return { node, ok: true };
-  }
-
-  // leftPart places left-part tiles from the rack (up to limit), calling extendRight
-  // after each prefix. Mirrors scrabble.acrossGen.leftPart.
-  private leftPart(node: number, anchorCol: number, limit: number): void {
-    this.extendRight(node, anchorCol, anchorCol);
-    if (limit === 0) return;
-    this.dawg.arcs(node, (label, dest) => {
-      if (this.rk.has(label)) {
-        this.rk.remove(label);
-        this.left.push({ letter: label, blank: false });
-        this.leftPart(dest, anchorCol, limit - 1);
-        this.left.pop();
-        this.rk.add(label);
-      }
-      if (this.rk.blanks() > 0) {
-        this.rk.removeBlank();
-        this.left.push({ letter: label, blank: true });
-        this.leftPart(dest, anchorCol, limit - 1);
-        this.left.pop();
-        this.rk.addBlank();
-      }
-      return true;
-    });
-  }
-
-  // extendRight extends the word rightward from col, placing rack tiles on empty
-  // squares (constrained by cross-sets) and following board tiles. A word is recorded
-  // only past the anchor. Mirrors scrabble.acrossGen.extendRight.
-  private extendRight(node: number, col: number, anchorCol: number): void {
-    if (col >= this.bd.cols) {
-      if (col > anchorCol && this.dawg.final(node)) this.record(anchorCol);
-      return;
-    }
-    if (this.bd.filled(this.row, col)) {
-      const dest = this.dawg.next(node, this.bd.cellAt(this.row, col).letter);
-      if (dest >= 0) this.extendRight(dest, col + 1, anchorCol);
-      return;
-    }
-
-    if (col > anchorCol && this.dawg.final(node)) this.record(anchorCol);
-    const cross = this.cross(this.row, col);
-    this.dawg.arcs(node, (label, dest) => {
-      if (cross[label] !== 1) return true;
-      if (this.rk.has(label)) {
-        this.rk.remove(label);
-        this.right.push({ row: this.row, col, letter: label, blank: false });
-        this.extendRight(dest, col + 1, anchorCol);
-        this.right.pop();
-        this.rk.add(label);
-      }
-      if (this.rk.blanks() > 0) {
-        this.rk.removeBlank();
-        this.right.push({ row: this.row, col, letter: label, blank: true });
-        this.extendRight(dest, col + 1, anchorCol);
-        this.right.pop();
-        this.rk.addBlank();
-      }
-      return true;
-    });
-  }
-
-  // record assembles the play (left part at fixed columns, then the right part) and
-  // reports it, skipping plays that lay no new tile. Mirrors scrabble.acrossGen.record.
-  private record(anchorCol: number): void {
-    if (this.left.length + this.right.length === 0) return;
-    const placements: Placement[] = [];
-    const leftStart = anchorCol - this.left.length;
-    for (let i = 0; i < this.left.length; i++) {
-      placements.push({ row: this.row, col: leftStart + i, letter: this.left[i].letter, blank: this.left[i].blank });
-    }
-    for (const p of this.right) placements.push(p);
-    this.emit(placements);
-  }
-}
-
-// runAcross generates all across plays on bd and reports each via emit in bd's
-// coordinates. Cross-sets are computed lazily (vertical words on bd) and cached.
-// Mirrors DAWGGenerator.runAcross.
-function runAcross(
-  dawg: Dawg,
-  bd: GenBoard,
-  rk: GenRack,
-  size: number,
-  rs: Ruleset,
-  centerRow: number,
-  centerCol: number,
-  emit: (placements: Placement[]) => void,
-): void {
-  let crossFn: (r: number, c: number) => LetterSet;
-  if (rs.ignoreCrossWords) {
-    const full = fullSet(size);
-    crossFn = () => full;
-  } else {
-    const cache = new Array<LetterSet | undefined>(bd.rows * bd.cols);
-    crossFn = (r, c) => {
-      const i = r * bd.cols + c;
-      let s = cache[i];
-      if (!s) {
-        const { above, below } = columnContext(bd, r, c);
-        s = dawgCrossSet(dawg, above, below, size);
-        cache[i] = s;
-      }
-      return s;
-    };
-  }
-
-  const ag = new AcrossGen(dawg, bd, rk, crossFn, emit);
-  const firstMove = bd.isEmpty();
-  for (let row = 0; row < bd.rows; row++) {
-    ag.generateRow(row, firstMove, centerRow, centerCol);
-  }
-}
-
-// moveKey is a canonical string identifying a play (direction plus its placed tiles),
-// used to de-duplicate and rank generated moves. Mirrors scrabble.moveKey.
-export function moveKey(dir: Direction, placements: readonly Placement[]): string {
-  const ps = placements.slice().sort((a, b) => (a.row !== b.row ? a.row - b.row : a.col - b.col));
-  let s = String(dir);
-  for (const p of ps) s += `;${p.row},${p.col},${p.letter}${p.blank ? '*' : ''}`;
-  return s;
-}
-
-/**
- * generateMoves returns every legal play for rack on board in the mode's orientations,
- * ranked by descending score (ties broken by the canonical move key). It walks the DAWG
- * with the cursor and scores each play with evaluate(); the alphabet size is taken from
- * the ruleset's value table. Mirrors (*Solver).GenerateMovesOpts (the ruleset carries
- * ignoreCrossWords for the single-word rule).
- */
-export function generateMoves(dawg: Dawg, board: GenBoard, rack: GenRack, rs: Ruleset, mode: Mode = Both): Move[] {
-  const size = rs.values.length;
-  const rk = rack.clone(); // generation mutates the rack in place and restores it
-  const centerRow = Math.floor(rs.center / rs.cols);
-  const centerCol = rs.center % rs.cols;
-
-  const moves: Move[] = [];
-  const seen = new Set<string>();
-  const emit = (dir: Direction, placements: Placement[]): void => {
-    const key = moveKey(dir, placements);
-    if (seen.has(key)) return;
-    const res = evaluate(board, rs, dir, placements);
-    if (res.err || !res.move) return;
-    seen.add(key);
-    moves.push(res.move);
-  };
-
-  if (modeIncludes(mode, Horizontal)) {
-    runAcross(dawg, board, rk, size, rs, centerRow, centerCol, (p) => emit(Horizontal, p));
-  }
-  if (modeIncludes(mode, Vertical)) {
-    const tb = transpose(board);
-    runAcross(dawg, tb, rk, size, rs, centerCol, centerRow, (p) => {
-      const rp = p.map((pl) => ({ row: pl.col, col: pl.row, letter: pl.letter, blank: pl.blank }));
-      emit(Vertical, rp);
-    });
-  }
-
-  const kept = moves.filter((m) => connected(board, rs, m));
-  kept.sort((a, b) => {
-    if (a.score !== b.score) return b.score - a.score;
-    const ka = moveKey(a.dir, a.tiles);
-    const kb = moveKey(b.dir, b.tiles);
-    return ka < kb ? -1 : ka > kb ? 1 : 0;
-  });
-  return kept;
-}

ui/src/lib/dict/offlineready.ts

@@ -1,27 +0,0 @@
-// Browser orchestration for the offline-toggle readiness wait. Lazily imported by
-// offline.svelte.ts's requestOffline so the dict loader/generator it pulls in stays out of the main
-// bundle. It runs the same cache-first preload as the background warmup (preload.ts), but bounded by
-// a UI wait: it tells the toggle whether flipping to offline can succeed right now, and leaves the
-// fetch running on a timeout so a later flip is instant.
-
-import type { Profile } from '../model';
-import { preloadDicts } from './preload';
-import { getDawg, dictLoadingDisabled } from '../dict';
-import { raceOfflineReady } from '../offline';
-
-/**
- * ensureOfflineDicts fetches the profile's enabled variants' dictionaries cache-first (instant when
- * already warm, a network fetch otherwise) and reports, within budgetMs, whether every one is
- * available — the offline toggle's readiness gate. With no enabled variant there is nothing to play
- * offline, so it is never ready. The fetch is not aborted on a timeout; it keeps warming the
- * on-device cache in the background so a later flip to offline succeeds immediately.
- */
-export async function ensureOfflineDicts(prof: Profile, budgetMs: number): Promise<boolean> {
-  if (prof.variantPreferences.length === 0) return false;
-  const run = preloadDicts(prof.dictVersions, prof.variantPreferences, {
-    getDawg,
-    disabled: dictLoadingDisabled,
-    retries: 1,
-  });
-  return raceOfflineReady(run, budgetMs);
-}

ui/src/lib/dict/preload.test.ts

@@ -1,86 +0,0 @@
-import { describe, it, expect } from 'vitest';
-import { preloadDicts } from './preload';
-import type { Variant } from '../model';
-import type { Dawg } from './dawg';
-
-// A non-null stand-in for a loaded reader — preloadDicts only checks getDawg's result for null.
-const DAWG = {} as Dawg;
-const noSleep = (): Promise<void> => Promise.resolve();
-
-describe('preloadDicts', () => {
-  it('fetches every enabled variant that has a known version', async () => {
-    const calls: string[] = [];
-    const res = await preloadDicts({ scrabble_en: 'v1', scrabble_ru: 'v2', erudit_ru: 'v3' }, ['scrabble_en', 'erudit_ru'], {
-      getDawg: async (v: Variant, ver: string) => {
-        calls.push(`${v}@${ver}`);
-        return DAWG;
-      },
-      disabled: () => false,
-      sleep: noSleep,
-    });
-    expect(res.ok).toEqual(['scrabble_en', 'erudit_ru']);
-    expect(res.failed).toEqual([]);
-    expect(calls).toEqual(['scrabble_en@v1', 'erudit_ru@v3']);
-  });
-
-  it('marks a variant with no known version as failed without fetching it', async () => {
-    const calls: string[] = [];
-    const res = await preloadDicts({ scrabble_en: 'v1' }, ['scrabble_en', 'scrabble_ru'], {
-      getDawg: async (v: Variant) => {
-        calls.push(v);
-        return DAWG;
-      },
-      disabled: () => false,
-      sleep: noSleep,
-    });
-    expect(res.ok).toEqual(['scrabble_en']);
-    expect(res.failed).toEqual(['scrabble_ru']);
-    expect(calls).toEqual(['scrabble_en']);
-  });
-
-  it('retries a transient failure with linear backoff, then succeeds', async () => {
-    let attempts = 0;
-    const waits: number[] = [];
-    const res = await preloadDicts({ scrabble_en: 'v1' }, ['scrabble_en'], {
-      getDawg: async () => (++attempts >= 3 ? DAWG : null),
-      disabled: () => false,
-      sleep: async (ms: number) => void waits.push(ms),
-      retries: 3,
-      backoffMs: 100,
-    });
-    expect(res.ok).toEqual(['scrabble_en']);
-    expect(attempts).toBe(3);
-    expect(waits).toEqual([100, 200]);
-  });
-
-  it('gives up a persistent failure after the retry budget', async () => {
-    let attempts = 0;
-    const res = await preloadDicts({ scrabble_en: 'v1' }, ['scrabble_en'], {
-      getDawg: async () => {
-        attempts++;
-        return null;
-      },
-      disabled: () => false,
-      sleep: noSleep,
-      retries: 2,
-    });
-    expect(res.failed).toEqual(['scrabble_en']);
-    expect(res.ok).toEqual([]);
-    expect(attempts).toBe(3);
-  });
-
-  it('stops retrying once the session miss-breaker trips', async () => {
-    let attempts = 0;
-    const res = await preloadDicts({ scrabble_en: 'v1' }, ['scrabble_en'], {
-      getDawg: async () => {
-        attempts++;
-        return null;
-      },
-      disabled: () => true,
-      sleep: noSleep,
-      retries: 5,
-    });
-    expect(res.failed).toEqual(['scrabble_en']);
-    expect(attempts).toBe(1);
-  });
-});

ui/src/lib/dict/preload.ts

@@ -1,68 +0,0 @@
-// Background dictionary preload for offline readiness. An installed PWA with a confirmed email
-// warms the dictionaries for the player's enabled variants while online, so a later switch to
-// deliberate offline mode has the data it needs. The pure preloadDicts here takes its side effects
-// (getDawg, the session miss-breaker, sleep) as dependencies, so it unit-tests in the node env. The
-// eligibility and once/online guard live in offline.svelte.ts (kickDictPreload); the browser
-// orchestration that supplies the real side effects and raises the in-lobby warning lives in
-// preloadrun.ts, which offline.svelte.ts imports dynamically so neither the loader nor the
-// generator is pulled into the main bundle.
-
-import type { Variant } from '../model';
-import type { Dawg } from './dawg';
-
-/** PreloadDeps injects preloadDicts's side effects so the logic stays pure and testable. */
-export interface PreloadDeps {
-  /** getDawg resolves the (variant, version) reader, serving memory/IndexedDB before the network,
-   *  or null on any miss — mirrors the in-game loader. */
-  getDawg: (variant: Variant, version: string) => Promise<Dawg | null>;
-  /** disabled reports whether the session dictionary miss-breaker has tripped (too many network
-   *  misses this session); when it has, a network fetch will not recover, so retries stop. */
-  disabled: () => boolean;
-  /** sleep waits between retries; defaults to a real timer. */
-  sleep?: (ms: number) => Promise<void>;
-  /** retries is the number of extra attempts after the first (default 2). */
-  retries?: number;
-  /** backoffMs is the base linear backoff between attempts (default 800). */
-  backoffMs?: number;
-}
-
-/** PreloadResult reports which enabled variants ended up available (ok) and which are still
- *  missing (failed) after the preload — the caller surfaces a warning when failed is non-empty. */
-export interface PreloadResult {
-  ok: Variant[];
-  failed: Variant[];
-}
-
-/**
- * preloadDicts fetches, via getDawg, the dictionary for each enabled variant that has a known
- * version, retrying transient misses with linear backoff. A variant with no known version, or one
- * still missing after the retry budget, lands in failed; the rest in ok. It never throws and stops
- * retrying a variant once the session miss-breaker (disabled) trips, since the network will not
- * recover this session — a cached dictionary is still served by getDawg regardless.
- */
-export async function preloadDicts(
-  versions: Partial<Record<Variant, string>>,
-  enabled: readonly Variant[],
-  deps: PreloadDeps,
-): Promise<PreloadResult> {
-  const sleep = deps.sleep ?? ((ms) => new Promise<void>((r) => setTimeout(r, ms)));
-  const retries = deps.retries ?? 2;
-  const backoffMs = deps.backoffMs ?? 800;
-  const ok: Variant[] = [];
-  const failed: Variant[] = [];
-  for (const variant of enabled) {
-    const version = versions[variant];
-    if (!version) {
-      failed.push(variant);
-      continue;
-    }
-    let dawg: Dawg | null = null;
-    for (let attempt = 0; attempt <= retries; attempt++) {
-      dawg = await deps.getDawg(variant, version);
-      if (dawg || deps.disabled()) break;
-      if (attempt < retries) await sleep(backoffMs * (attempt + 1));
-    }
-    (dawg ? ok : failed).push(variant);
-  }
-  return { ok, failed };
-}

ui/src/lib/dict/preloadrun.ts

@@ -1,24 +0,0 @@
-// Browser-only orchestration for the offline dictionary preload. Kept apart from the pure
-// preloadDicts (preload.ts) — which unit-tests in the node env — and lazily imported by
-// offline.svelte.ts's kickDictPreload, so the dict loader/generator it pulls in stays out of the
-// main bundle. It supplies the real side effects (getDawg, the session miss-breaker) and raises the
-// in-lobby notice when a first-lobby preload cannot fetch every enabled variant's dictionary.
-
-import type { Profile } from '../model';
-import { preloadDicts } from './preload';
-import { getDawg, dictLoadingDisabled } from '../dict';
-import { setDictPreloadWarning } from '../offline.svelte';
-
-/**
- * runPreload warms the dictionaries for the profile's enabled variants (using the versions the
- * profile advertises) via the real dict loader, so a later switch to offline mode has the data.
- * When warnOnFail is set (the first lobby entry), it raises the in-lobby notice if a variant is
- * still missing afterwards, and clears it on a run where every variant is available.
- */
-export async function runPreload(prof: Profile, warnOnFail: boolean): Promise<void> {
-  const res = await preloadDicts(prof.dictVersions, prof.variantPreferences, {
-    getDawg,
-    disabled: dictLoadingDisabled,
-  });
-  if (warnOnFail) setDictPreloadWarning(res.failed.length > 0);
-}

ui/src/lib/dict/testdata/sample_en.words.json

@@ -1,122 +0,0 @@
-{
-  "alphabet": "en",
-  "numAdded": 18,
-  "words": [
-    "a",
-    "an",
-    "and",
-    "ant",
-    "car",
-    "care",
-    "cared",
-    "cares",
-    "cars",
-    "cat",
-    "cats",
-    "do",
-    "doe",
-    "does",
-    "dog",
-    "dogs",
-    "done",
-    "dot"
-  ],
-  "indexes": [
-    [
-      0
-    ],
-    [
-      0,
-      13
-    ],
-    [
-      0,
-      13,
-      3
-    ],
-    [
-      0,
-      13,
-      19
-    ],
-    [
-      2,
-      0,
-      17
-    ],
-    [
-      2,
-      0,
-      17,
-      4
-    ],
-    [
-      2,
-      0,
-      17,
-      4,
-      3
-    ],
-    [
-      2,
-      0,
-      17,
-      4,
-      18
-    ],
-    [
-      2,
-      0,
-      17,
-      18
-    ],
-    [
-      2,
-      0,
-      19
-    ],
-    [
-      2,
-      0,
-      19,
-      18
-    ],
-    [
-      3,
-      14
-    ],
-    [
-      3,
-      14,
-      4
-    ],
-    [
-      3,
-      14,
-      4,
-      18
-    ],
-    [
-      3,
-      14,
-      6
-    ],
-    [
-      3,
-      14,
-      6,
-      18
-    ],
-    [
-      3,
-      14,
-      13,
-      4
-    ],
-    [
-      3,
-      14,
-      19
-    ]
-  ]
-}

ui/src/lib/dict/testdata/sample_ru.words.json

@@ -1,38 +0,0 @@
-{
-  "alphabet": "ru",
-  "numAdded": 6,
-  "words": [
-    "ад",
-    "ар",
-    "оса",
-    "я",
-    "яд",
-    "яр"
-  ],
-  "indexes": [
-    [
-      0,
-      4
-    ],
-    [
-      0,
-      17
-    ],
-    [
-      15,
-      18,
-      0
-    ],
-    [
-      32
-    ],
-    [
-      32,
-      4
-    ],
-    [
-      32,
-      17
-    ]
-  ]
-}

ui/src/lib/dict/validate.ts

@@ -297,9 +297,8 @@ export function validatePlay(
 }
 
 // connected reports whether the play connects to the position (or covers the
-// centre on the first move). Mirrors (*Solver).connected. Exported so the move
-// generator can apply the same post-generation connectivity filter.
-export function connected(b: Board, rs: Ruleset, m: Move): boolean {
+// centre on the first move). Mirrors (*Solver).connected.
+function connected(b: Board, rs: Ruleset, m: Move): boolean {
   if (b.isEmpty()) {
     const cr = Math.floor(rs.center / rs.cols);
     const cc = rs.center % rs.cols;

ui/src/lib/gamesource.ts

@@ -1,76 +0,0 @@
-// Dispatch a game id to its source: the local engine (an offline vs_ai game) or the network
-// gateway. The same game screen (game/Game.svelte) drives both through the shared game-loop subset
-// (GameLoopSource); a game id decides which. A network game's calls are unchanged — gameSource
-// returns the gateway itself for it — so the seam adds the local path without touching online play.
-//
-// The offline engine is kept OUT of the app entry bundle: this module statically imports only the
-// gateway, the tiny id helper and types; the LocalSource is dynamically imported on first use of a
-// local game, so it loads as a separate chunk only when someone plays offline.
-
-import { gateway } from './gateway';
-import { isLocalGameId } from './localgame/id';
-import type { GameLoopSource, LocalSource } from './localgame/source';
-
-let loaded: Promise<LocalSource> | null = null;
-function load(): Promise<LocalSource> {
-  if (!loaded) loaded = import('./localgame/source').then((m) => new m.LocalSource());
-  return loaded;
-}
-
-/**
- * localSource is a lazy handle on the single offline LocalSource. It is obtainable synchronously,
- * but each method dynamically imports the engine on first use, so the offline code stays out of the
- * app entry bundle until a local game is actually played. It exposes the game-loop methods plus the
- * local-only create() and the robot-reply event subscription events().
- */
-export const localSource = {
-  // Offline scoring is self-contained, so the local source ignores includeAlphabet, the evaluate
-  // abort signal, and the draft (drafts are not persisted offline); the proxy accepts the full
-  // gateway signatures but forwards only what the local source uses.
-  gameState: (id, _includeAlphabet) => load().then((s) => s.gameState(id)),
-  gameHistory: (id) => load().then((s) => s.gameHistory(id)),
-  submitPlay: (id, tiles, variant) => load().then((s) => s.submitPlay(id, tiles, variant)),
-  pass: (id) => load().then((s) => s.pass(id)),
-  exchange: (id, tiles, variant) => load().then((s) => s.exchange(id, tiles, variant)),
-  resign: (id) => load().then((s) => s.resign(id)),
-  hint: (id) => load().then((s) => s.hint(id)),
-  evaluate: (id, tiles, variant, _signal) => load().then((s) => s.evaluate(id, tiles, variant)),
-  checkWord: (id, word, variant) => load().then((s) => s.checkWord(id, word, variant)),
-  draftGet: (_id) => load().then((s) => s.draftGet()),
-  draftSave: (_id, _json) => load().then((s) => s.draftSave()),
-  create: (opts) => load().then((s) => s.create(opts)),
-  list: () => load().then((s) => s.list()),
-  delete: (id) => load().then((s) => s.delete(id)),
-  // Offline hotseat controls (no network equivalent): reveal a PIN-locked seat, and the host
-  // (referee) overrides gated by the master PIN.
-  unlockSeat: (id, pin) => load().then((s) => s.unlockSeat(id, pin)),
-  verifyHostPin: (id, pin) => load().then((s) => s.verifyHostPin(id, pin)),
-  hostAction: (id, pin, action, targetSeat) => load().then((s) => s.hostAction(id, pin, action, targetSeat)),
-  // relock is fire-and-forget: the engine is already loaded (the game was open), and re-locking a
-  // cached game before the screen is left needs no result.
-  relock: (id) => void load().then((s) => s.relock(id)),
-  // events must return the unsubscribe synchronously (the screen subscribes in onMount), so it wires
-  // the real subscription once the engine loads and, until then, cancels a pending subscribe.
-  events: (id, onEvent) => {
-    let unsub = (): void => {};
-    let cancelled = false;
-    void load().then((s) => {
-      if (!cancelled) unsub = s.events(id, onEvent);
-    });
-    return () => {
-      cancelled = true;
-      unsub();
-    };
-  },
-} satisfies GameLoopSource &
-  Pick<LocalSource, 'events' | 'create' | 'list' | 'delete' | 'unlockSeat' | 'verifyHostPin' | 'hostAction' | 'relock'>;
-
-/**
- * gameSource returns the source that runs the game with the given id: the local engine for a local
- * id, otherwise the network gateway (which satisfies the same game-loop interface).
- */
-export function gameSource(id: string): GameLoopSource {
-  return isLocalGameId(id) ? localSource : gateway;
-}
-
-export { isLocalGameId } from './localgame/id';

ui/src/lib/gateway.ts

@@ -5,7 +5,6 @@
 import type { GatewayClient } from './client';
 import { MockGateway } from './mock/client';
 import { createTransport } from './transport';
-import { setForcedSeed } from './localgame/id';
 import { reportOffline, reportOnline } from './connection.svelte';
 import { clearMaintenance, maintenanceRecovered, reportMaintenance } from './maintenance.svelte';
 
@@ -42,7 +41,6 @@ if (isMock && typeof window !== 'undefined') {
         setGameLimit(v: boolean): void;
         clearEmail(): void;
         confirmEmailOutOfBand(email: string): void;
-        setLocalSeed(seed: string): void;
       };
     }
   ).__mock = {
@@ -52,8 +50,5 @@ if (isMock && typeof window !== 'undefined') {
     setGameLimit: (v: boolean) => (gateway as MockGateway).setGameLimit(v),
     clearEmail: () => (gateway as MockGateway).mockClearEmail(),
     confirmEmailOutOfBand: (email: string) => (gateway as MockGateway).mockConfirmEmailOutOfBand(email),
-    // Pin the next local game's bag seed, so the offline e2e deals a known rack (a bigint as a
-    // string — window hooks marshal strings cleanly).
-    setLocalSeed: (seed: string) => setForcedSeed(BigInt(seed)),
   };
 }

ui/src/lib/hints.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest';
-import { hintsLeft, hintGateRemainingMs, hintLockMinutes } from './hints';
+import { hintsLeft } from './hints';
 
 // view carries only the two fields hintsLeft reads.
 const view = (hintsRemaining: number, walletBalance: number) => ({ hintsRemaining, walletBalance });
@@ -30,32 +30,3 @@ describe('hintsLeft', () => {
     expect(hintsLeft(view(1, 0), -5)).toBe(1);
   });
 });
-
-describe('hintGateRemainingMs (the vs_ai idle-hint gate, monotonic)', () => {
-  it('is 0 when the gate is open — a null anchor (the human first move, or a non-gated game)', () => {
-    expect(hintGateRemainingMs(null, 60_000, 5000)).toBe(0);
-  });
-
-  it('is the window remaining minus the monotonic time elapsed since the anchor', () => {
-    // anchored at mono 1000 with 60s left; 20s of monotonic time later -> 40s left.
-    expect(hintGateRemainingMs(1000, 60_000, 1000 + 20_000)).toBe(40_000);
-  });
-
-  it('is 0 once the elapsed monotonic time reaches (or passes) the window', () => {
-    expect(hintGateRemainingMs(1000, 60_000, 1000 + 60_000)).toBe(0);
-    expect(hintGateRemainingMs(1000, 60_000, 1000 + 90_000)).toBe(0);
-  });
-});
-
-describe('hintLockMinutes (the toast N, rounded up)', () => {
-  it('rounds up to whole minutes, so a still-closed gate never reads 0', () => {
-    expect(hintLockMinutes(1)).toBe(1);
-    expect(hintLockMinutes(60_000)).toBe(1);
-    expect(hintLockMinutes(61_000)).toBe(2);
-    expect(hintLockMinutes(29 * 60_000)).toBe(29);
-  });
-
-  it('is 0 when nothing remains', () => {
-    expect(hintLockMinutes(0)).toBe(0);
-  });
-});

ui/src/lib/hints.ts

@@ -24,27 +24,3 @@ export function hintsLeft(
   const allowance = Math.max(0, view.hintsRemaining - view.walletBalance);
   return allowance + Math.max(0, walletBalance);
 }
-
-/** HINT_GATE_MS is the idle time a vs_ai player must be stuck on a turn before a hint unlocks. */
-export const HINT_GATE_MS = 30 * 60 * 1000;
-
-/**
- * hintGateRemainingMs returns how long (in milliseconds) until a vs_ai game's idle hint unlocks — 0
- * once it is available. It counts down from a MONOTONIC clock (performance.now()), so a client clock
- * change cannot skew it: gateStartMono is performance.now() captured when the source's "seconds left"
- * was received, gateLeftMs is that seconds-left in ms, and monoNow is performance.now() now; the
- * remaining is gateLeftMs minus the monotonic time elapsed since the anchor. gateStartMono null means
- * the gate is open (the human's first move, or a non-gated game). The duration comes from the source
- * (the SERVER clock online, the device clock offline) and is re-fetched on every load, so the wait
- * both persists across a relaunch and stays immune to a live clock change.
- */
-export function hintGateRemainingMs(gateStartMono: number | null, gateLeftMs: number, monoNow: number): number {
-  if (gateStartMono === null) return 0;
-  return Math.max(0, gateLeftMs - (monoNow - gateStartMono));
-}
-
-/** hintLockMinutes rounds a remaining-milliseconds gap up to whole minutes for the "available in N
- *  min." toast, so a gate that is still closed never reads 0. */
-export function hintLockMinutes(remainingMs: number): number {
-  return Math.ceil(remainingMs / 60000);
-}

ui/src/lib/i18n/en.ts

@@ -99,7 +99,6 @@ export const en = {
   'game.draw': 'Exchange/Pass',
   'game.shuffle': 'Shuffle',
   'game.hint': 'Hint',
-  'game.hintLockedIn': 'Available in {n} min.',
   'game.chat': 'Chat',
   'game.checkWord': 'Check word',
   'game.dictionary': 'Dictionary',
@@ -215,15 +214,6 @@ export const en = {
   'settings.labelsClassic': 'Classic',
   'settings.labelsNone': 'None',
   'settings.reduceMotion': 'Reduce motion',
-  'settings.offlineMode': 'Play mode',
-  'settings.online': 'Online',
-  'settings.offline': 'Offline',
-  'settings.offlineChecking': 'Loading dictionaries…',
-  'settings.offlineNeedsData': 'Not enough data on the device. Internet access is needed to download it.',
-  'offline.preloadWarning': 'Poor internet connection. Some features may be unavailable.',
-  'offline.promptTitle': 'No connection. Enable offline mode?',
-  'offline.promptYes': 'Enable',
-  'offline.promptNo': 'Keep trying',
 
   'about.title': 'About',
   'about.tab': 'Info',
@@ -244,17 +234,6 @@ export const en = {
   'landing.tagline': 'Play Scrabble with friends, random opponent or an AI.',
   'landing.playTelegram': 'Play in Telegram',
   'landing.playVK': 'Play on VK',
-  'landing.playWeb': 'Play in your browser',
-  'landing.captionTelegram': 'Telegram',
-  'landing.captionVK': 'VK',
-  'landing.captionWeb': 'Web',
-
-  'install.title': 'Install the app',
-  'install.subtitle': 'Put the app icon on your desktop (home screen) to open the game in one tap.',
-  'install.iosTitle': 'Add to Home Screen',
-  'install.iosStep1': 'Tap the Share button in the browser toolbar.',
-  'install.iosStep2': 'Choose “Add to Home Screen”.',
-  'install.iosStep3': 'Tap “Add”.',
 
   'lang.en': 'English',
   'lang.ru': 'Русский',
@@ -389,35 +368,6 @@ export const en = {
   'error.game_active': 'Available only after the game is finished.',
   'error.invalid_profile': 'Some profile fields are invalid.',
   'error.already_confirmed': 'This email is already confirmed.',
-
-  'pin.enter': 'Enter PIN',
-  'pin.create': 'Create a PIN',
-  'pin.repeat': 'Repeat the PIN',
-  'pin.enterCurrent': 'Enter current PIN',
-  'pin.mismatch': "PINs don't match",
-  'pin.wrong': 'Wrong PIN',
-  'pin.setNew': 'Set a new PIN',
-  'pin.remove': 'Remove PIN',
-
-  'hotseat.hostPin': 'Host password',
-  'hotseat.setPin': 'Password',
-  'hotseat.changePin': 'Change',
-  'hotseat.playerName': 'Player name',
-  'hotseat.addPlayer': 'Add player',
-  'hotseat.removePlayer': 'Remove player',
-  'hotseat.hostPlaysTitle': 'Are you playing too?',
-  'hotseat.hostPlaysYes': 'Yes, I play',
-  'hotseat.hostPlaysNo': 'No',
-  'hotseat.unlock': 'Unlock',
-  'hotseat.unlockTitle': 'Unlock: {name}',
-  'hotseat.turnOf': 'Turn: {name}',
-  'hotseat.host': 'Host',
-  'hotseat.skip': 'Skip the current turn',
-  'hotseat.exclude': 'Exclude a player:',
-  'hotseat.terminate': 'End the game',
-  'hotseat.askSkip': "Skip {name}'s turn?",
-  'hotseat.askExclude': 'Remove {name} from the game?',
-  'hotseat.askTerminate': 'End the game with no result?',
 } as const;
 
 export type MessageKey = keyof typeof en;

ui/src/lib/i18n/ru.ts

@@ -99,7 +99,6 @@ export const ru: Record<MessageKey, string> = {
   'game.draw': 'Обмен/Пас',
   'game.shuffle': 'Перемешать',
   'game.hint': 'Подсказка',
-  'game.hintLockedIn': 'Будет доступно через {n} мин.',
   'game.chat': 'Чат',
   'game.checkWord': 'Проверить слово',
   'game.dictionary': 'Словарь',
@@ -215,15 +214,6 @@ export const ru: Record<MessageKey, string> = {
   'settings.labelsClassic': 'Классика',
   'settings.labelsNone': 'Без текста',
   'settings.reduceMotion': 'Меньше анимаций',
-  'settings.offlineMode': 'Режим игры',
-  'settings.online': 'Онлайн',
-  'settings.offline': 'Оффлайн',
-  'settings.offlineChecking': 'Загрузка словарей…',
-  'settings.offlineNeedsData': 'Недостаточно данных. Необходим доступ в интернет для загрузки.',
-  'offline.preloadWarning': 'Плохое соединение с интернет. Некоторые функции могут быть недоступны.',
-  'offline.promptTitle': 'Нет связи. Включить офлайн-режим?',
-  'offline.promptYes': 'Включить',
-  'offline.promptNo': 'Ждать сеть',
 
   'about.title': 'О программе',
   'about.tab': 'Инфо',
@@ -244,17 +234,6 @@ export const ru: Record<MessageKey, string> = {
   'landing.tagline': 'Играй в «Эрудита» с друзьями, случайным соперником или ИИ-роботом.',
   'landing.playTelegram': 'Играть в Telegram',
   'landing.playVK': 'Играть во ВКонтакте',
-  'landing.playWeb': 'Играть в браузере',
-  'landing.captionTelegram': 'Telegram',
-  'landing.captionVK': 'VK',
-  'landing.captionWeb': 'Веб-версия',
-
-  'install.title': 'Установить приложение',
-  'install.subtitle': 'Поместите иконку приложения на рабочий стол (домашний экран), чтобы открывать игру одним нажатием.',
-  'install.iosTitle': 'На экран «Домой»',
-  'install.iosStep1': 'Нажмите кнопку «Поделиться» на панели браузера.',
-  'install.iosStep2': 'Выберите «На экран „Домой“».',
-  'install.iosStep3': 'Нажмите «Добавить».',
 
   'lang.en': 'English',
   'lang.ru': 'Русский',
@@ -389,33 +368,4 @@ export const ru: Record<MessageKey, string> = {
   'error.game_active': 'Доступно только после завершения игры.',
   'error.invalid_profile': 'Некоторые поля профиля некорректны.',
   'error.already_confirmed': 'Эта почта уже подтверждена.',
-
-  'pin.enter': 'Введите PIN',
-  'pin.create': 'Придумайте PIN',
-  'pin.repeat': 'Повторите PIN',
-  'pin.enterCurrent': 'Введите текущий PIN',
-  'pin.mismatch': 'PIN не совпадает',
-  'pin.wrong': 'Неверный PIN',
-  'pin.setNew': 'Задать новый PIN',
-  'pin.remove': 'Удалить пароль',
-
-  'hotseat.hostPin': 'Пароль ведущего',
-  'hotseat.setPin': 'Пароль',
-  'hotseat.changePin': 'Изменить',
-  'hotseat.playerName': 'Имя игрока',
-  'hotseat.addPlayer': 'Добавить игрока',
-  'hotseat.removePlayer': 'Удалить игрока',
-  'hotseat.hostPlaysTitle': 'Принимаете участие в игре?',
-  'hotseat.hostPlaysYes': 'Да, играю',
-  'hotseat.hostPlaysNo': 'Нет',
-  'hotseat.unlock': 'Разблокировать',
-  'hotseat.unlockTitle': 'Разблокировать: {name}',
-  'hotseat.turnOf': 'Ход: {name}',
-  'hotseat.host': 'Ведущий',
-  'hotseat.skip': 'Пропустить ход',
-  'hotseat.exclude': 'Исключить игрока:',
-  'hotseat.terminate': 'Отменить партию',
-  'hotseat.askSkip': 'Пропустить ход игрока {name}?',
-  'hotseat.askExclude': 'Удалить {name} из игры?',
-  'hotseat.askTerminate': 'Отменить партию без результата?',
 };

ui/src/lib/lobbycache.test.ts

@@ -43,10 +43,10 @@ beforeEach(() => clearLobby());
 
 describe('patchLobbyGame', () => {
   it('replaces the matching game by id and leaves the others untouched', () => {
-    setLobby({ games: [gameView('a', 'active', 0), gameView('b', 'active', 0)], invitations: [], incoming: [], atGameLimit: false, offline: false });
+    setLobby({ games: [gameView('a', 'active', 0), gameView('b', 'active', 0)], invitations: [], incoming: [], atGameLimit: false });
     // The player's own move flipped game "a" to the opponent's turn.
     patchLobbyGame(gameView('a', 'active', 1));
-    const snap = getLobby(false);
+    const snap = getLobby();
     expect(snap?.games.map((g) => g.id)).toEqual(['a', 'b']);
     expect(snap?.games.find((g) => g.id === 'a')?.toMove).toBe(1);
     expect(snap?.games.find((g) => g.id === 'b')?.toMove).toBe(0);
@@ -54,27 +54,27 @@ describe('patchLobbyGame', () => {
 
   it('preserves invitations and incoming when patching a game', () => {
     const incoming: AccountRef[] = [{ accountId: 'u9', displayName: 'Nine' }];
-    setLobby({ games: [gameView('a')], invitations: [], incoming, atGameLimit: false, offline: false });
+    setLobby({ games: [gameView('a')], invitations: [], incoming, atGameLimit: false });
     patchLobbyGame(gameView('a', 'finished'));
-    expect(getLobby(false)?.incoming).toEqual(incoming);
-    expect(getLobby(false)?.games[0].status).toBe('finished');
+    expect(getLobby()?.incoming).toEqual(incoming);
+    expect(getLobby()?.games[0].status).toBe('finished');
   });
 
   it('adds the game when it is not yet in the cached lobby (a game started elsewhere)', () => {
-    setLobby({ games: [gameView('a')], invitations: [], incoming: [], atGameLimit: false, offline: false });
+    setLobby({ games: [gameView('a')], invitations: [], incoming: [], atGameLimit: false });
     patchLobbyGame(gameView('z', 'active'));
     // Order is irrelevant — the lobby re-groups and re-sorts on render — so assert membership.
-    expect(getLobby(false)?.games.map((g) => g.id).sort()).toEqual(['a', 'z']);
+    expect(getLobby()?.games.map((g) => g.id).sort()).toEqual(['a', 'z']);
   });
 
   it('is a no-op when there is no cached lobby yet', () => {
     patchLobbyGame(gameView('a'));
-    expect(getLobby(false)).toBeNull();
+    expect(getLobby()).toBeNull();
   });
 
   it('does not mutate the previous snapshot array', () => {
     const games = [gameView('a', 'active', 0)];
-    setLobby({ games, invitations: [], incoming: [], atGameLimit: false, offline: false });
+    setLobby({ games, invitations: [], incoming: [], atGameLimit: false });
     patchLobbyGame(gameView('a', 'active', 1));
     expect(games[0].toMove).toBe(0); // the original array/object is left intact
   });
@@ -82,67 +82,51 @@ describe('patchLobbyGame', () => {
   it('preserves the at-game-limit flag across a game patch', () => {
     // A finished-game patch arriving while the lobby is unmounted must not drop the flag —
     // the lobby renders the "New Game" button from the cached snapshot before the refresh.
-    setLobby({ games: [gameView('a')], invitations: [], incoming: [], atGameLimit: true, offline: false });
+    setLobby({ games: [gameView('a')], invitations: [], incoming: [], atGameLimit: true });
     patchLobbyGame(gameView('a', 'finished'));
-    expect(getLobby(false)?.atGameLimit).toBe(true);
+    expect(getLobby()?.atGameLimit).toBe(true);
   });
 });
 
 describe('patchLobbyInvitation', () => {
   it('adds a new pending invitation to the cached lobby', () => {
-    setLobby({ games: [], invitations: [], incoming: [], atGameLimit: false, offline: false });
+    setLobby({ games: [], invitations: [], incoming: [], atGameLimit: false });
     patchLobbyInvitation(invitation('i1', 'pending'));
-    expect(getLobby(false)?.invitations.map((x) => x.id)).toEqual(['i1']);
+    expect(getLobby()?.invitations.map((x) => x.id)).toEqual(['i1']);
   });
 
   it('replaces a pending invitation already in the list (e.g. an updated response)', () => {
-    setLobby({ games: [], invitations: [invitation('i1', 'pending'), invitation('i2', 'pending')], incoming: [], atGameLimit: false, offline: false });
+    setLobby({ games: [], invitations: [invitation('i1', 'pending'), invitation('i2', 'pending')], incoming: [], atGameLimit: false });
     const updated = { ...invitation('i1', 'pending'), turnTimeoutSecs: 999 };
     patchLobbyInvitation(updated);
-    expect(getLobby(false)?.invitations.map((x) => x.id)).toEqual(['i1', 'i2']);
-    expect(getLobby(false)?.invitations.find((x) => x.id === 'i1')?.turnTimeoutSecs).toBe(999);
+    expect(getLobby()?.invitations.map((x) => x.id)).toEqual(['i1', 'i2']);
+    expect(getLobby()?.invitations.find((x) => x.id === 'i1')?.turnTimeoutSecs).toBe(999);
   });
 
   it('removes an invitation that reached a terminal status', () => {
     for (const terminal of ['declined', 'cancelled', 'started', 'expired']) {
-      setLobby({ games: [], invitations: [invitation('i1', 'pending'), invitation('i2', 'pending')], incoming: [], atGameLimit: false, offline: false });
+      setLobby({ games: [], invitations: [invitation('i1', 'pending'), invitation('i2', 'pending')], incoming: [], atGameLimit: false });
       patchLobbyInvitation(invitation('i1', terminal));
-      expect(getLobby(false)?.invitations.map((x) => x.id)).toEqual(['i2']);
+      expect(getLobby()?.invitations.map((x) => x.id)).toEqual(['i2']);
     }
   });
 
   it('is a no-op for a terminal invitation that is not in the list', () => {
-    setLobby({ games: [], invitations: [invitation('i2', 'pending')], incoming: [], atGameLimit: false, offline: false });
+    setLobby({ games: [], invitations: [invitation('i2', 'pending')], incoming: [], atGameLimit: false });
     patchLobbyInvitation(invitation('i1', 'declined'));
-    expect(getLobby(false)?.invitations.map((x) => x.id)).toEqual(['i2']);
+    expect(getLobby()?.invitations.map((x) => x.id)).toEqual(['i2']);
   });
 
   it('is a no-op when there is no cached lobby yet', () => {
     patchLobbyInvitation(invitation('i1', 'pending'));
-    expect(getLobby(false)).toBeNull();
+    expect(getLobby()).toBeNull();
   });
 
   it('preserves games and incoming when patching an invitation', () => {
     const incoming: AccountRef[] = [{ accountId: 'u9', displayName: 'Nine' }];
-    setLobby({ games: [gameView('g1')], invitations: [], incoming, atGameLimit: false, offline: false });
+    setLobby({ games: [gameView('g1')], invitations: [], incoming, atGameLimit: false });
     patchLobbyInvitation(invitation('i1', 'pending'));
-    expect(getLobby(false)?.games.map((g) => g.id)).toEqual(['g1']);
-    expect(getLobby(false)?.incoming).toEqual(incoming);
-  });
-});
-
-describe('getLobby is mode-aware (a mode flip must not render the other mode’s games)', () => {
-  it('returns the snapshot only for the mode it was stored under', () => {
-    setLobby({ games: [gameView('online1')], invitations: [], incoming: [], atGameLimit: false, offline: false });
-    expect(getLobby(false)?.games.map((g) => g.id)).toEqual(['online1']);
-    // Reading it as the OTHER (offline) mode must not surface the online snapshot.
-    expect(getLobby(true)).toBeNull();
-  });
-
-  it('replaces the snapshot when the mode changes, so the stale mode is dropped', () => {
-    setLobby({ games: [gameView('online1')], invitations: [], incoming: [], atGameLimit: false, offline: false });
-    setLobby({ games: [gameView('local1')], invitations: [], incoming: [], atGameLimit: false, offline: true });
-    expect(getLobby(false)).toBeNull();
-    expect(getLobby(true)?.games.map((g) => g.id)).toEqual(['local1']);
+    expect(getLobby()?.games.map((g) => g.id)).toEqual(['g1']);
+    expect(getLobby()?.incoming).toEqual(incoming);
   });
 });

ui/src/lib/lobbycache.ts

@@ -13,18 +13,13 @@ interface LobbySnapshot {
   // atGameLimit rides the snapshot so the lobby renders the "New Game" button in its last
   // known enabled/disabled state instantly (no flicker), then refreshes it in the background.
   atGameLimit: boolean;
-  // Which mode the snapshot belongs to (offline = device-local games, online = server games). The
-  // lobby renders it instantly only when it matches the current mode, so a mode flip never flashes —
-  // or lets the player open — the other mode's games before the background refresh replaces them.
-  offline: boolean;
 }
 
 let snapshot: LobbySnapshot | null = null;
 
-/** getLobby returns the last lobby lists for the given mode, or null before the first load or when
- *  the cached snapshot belongs to the other mode (so the lobby cold-renders after a mode flip). */
-export function getLobby(offline: boolean): LobbySnapshot | null {
-  return snapshot && snapshot.offline === offline ? snapshot : null;
+/** getLobby returns the last lobby lists, or null before the first load. */
+export function getLobby(): LobbySnapshot | null {
+  return snapshot;
 }
 
 /** setLobby stores the latest lobby lists. */

ui/src/lib/localgame/bag.test.ts

@@ -1,50 +0,0 @@
-import { describe, it, expect } from 'vitest';
-import { Bag } from './bag';
-import { RULESETS } from './ruleset';
-import { BLANK_INDEX } from '../alphabet';
-
-describe('offline bag', () => {
-  it('holds exactly the variant tile distribution', () => {
-    const rs = RULESETS.scrabble_en;
-    const total = rs.counts.reduce((a, b) => a + b, 0) + rs.blanks;
-    const bag = new Bag('scrabble_en', 42);
-    expect(bag.length).toBe(total);
-
-    const drawn = bag.draw(total);
-    expect(drawn.length).toBe(total);
-    expect(bag.length).toBe(0);
-
-    const tally = new Map<number, number>();
-    for (const t of drawn) tally.set(t, (tally.get(t) ?? 0) + 1);
-    for (let i = 0; i < rs.counts.length; i++) expect(tally.get(i) ?? 0).toBe(rs.counts[i]);
-    expect(tally.get(BLANK_INDEX) ?? 0).toBe(rs.blanks);
-  });
-
-  it('draws beyond the remaining, returning all and emptying', () => {
-    const bag = new Bag('scrabble_ru', 7);
-    const total = bag.length;
-    const all = bag.draw(total + 5);
-    expect(all.length).toBe(total);
-    expect(bag.length).toBe(0);
-    expect(bag.draw(3)).toEqual([]);
-  });
-
-  it('returns tiles back to the bag', () => {
-    const bag = new Bag('erudit_ru', 1);
-    const before = bag.length;
-    const seven = bag.draw(7);
-    expect(bag.length).toBe(before - 7);
-    bag.return(seven);
-    expect(bag.length).toBe(before);
-  });
-
-  it('is deterministic for a given seed and operation sequence', () => {
-    const a = new Bag('scrabble_en', 123);
-    const b = new Bag('scrabble_en', 123);
-    expect(a.draw(30)).toEqual(b.draw(30));
-    // A return reshuffles both identically, so subsequent draws still agree.
-    a.return([0, 1, 2]);
-    b.return([0, 1, 2]);
-    expect(a.draw(10)).toEqual(b.draw(10));
-  });
-});

ui/src/lib/localgame/bag.ts

@@ -1,76 +0,0 @@
-// The offline tile bag — the shuffled draw pile for one local game. Structurally a port of
-// backend/internal/engine/bag.go (fill from the variant's counts + blanks, draw from the end,
-// return-and-reshuffle for an exchange), but shuffled with a small DETERMINISTIC in-house PRNG
-// rather than Go's math/rand: a local game only needs to be reproducible from its own seed and
-// sequence of operations (for replay from the stored journal), not bit-identical to a server
-// game (docs plan). Blanks ride as BLANK_INDEX, matching lib/alphabet.ts (and the engine's
-// blankTile = 0xff = 255).
-
-import { RULESETS } from './ruleset';
-import { BLANK_INDEX } from '../alphabet';
-import type { Variant } from '../model';
-
-// mulberry32 is a compact deterministic PRNG returning a float in [0, 1). Seeded from the game
-// seed so the shuffle sequence — and thus the draws — replay identically for the same seed and
-// the same sequence of returns.
-function mulberry32(seed: number): () => number {
-  let a = seed >>> 0;
-  return () => {
-    a = (a + 0x6d2b79f5) | 0;
-    let t = Math.imul(a ^ (a >>> 15), 1 | a);
-    t = (t + Math.imul(t ^ (t >>> 7), 61 | t)) ^ t;
-    return ((t ^ (t >>> 14)) >>> 0) / 4294967296;
-  };
-}
-
-/**
- * Bag is one local game's draw pile. Construct it with the variant and a numeric seed; draw()
- * and return() mutate it in place. It is reproducible: the same seed and the same sequence of
- * operations yield the same draws.
- */
-export class Bag {
-  private tiles: number[];
-  private readonly rand: () => number;
-
-  constructor(variant: Variant, seed: number) {
-    const rs = RULESETS[variant];
-    const tiles: number[] = [];
-    for (let i = 0; i < rs.counts.length; i++) {
-      for (let n = 0; n < rs.counts[i]; n++) tiles.push(i);
-    }
-    for (let n = 0; n < rs.blanks; n++) tiles.push(BLANK_INDEX);
-    this.tiles = tiles;
-    this.rand = mulberry32(seed);
-    this.shuffle();
-  }
-
-  /** length is the number of tiles left in the bag. */
-  get length(): number {
-    return this.tiles.length;
-  }
-
-  /**
-   * draw removes up to n tiles from the end of the bag and returns them. Drawing more than
-   * remain returns all of them; drawing from an empty bag returns an empty array.
-   */
-  draw(n: number): number[] {
-    const take = Math.min(n, this.tiles.length);
-    return this.tiles.splice(this.tiles.length - take, take);
-  }
-
-  /** return puts tiles back into the bag and reshuffles, as when a player exchanges tiles. */
-  return(tiles: readonly number[]): void {
-    for (const t of tiles) this.tiles.push(t);
-    this.shuffle();
-  }
-
-  // shuffle randomises the remaining tiles in place with the bag's own PRNG (Fisher–Yates).
-  private shuffle(): void {
-    for (let i = this.tiles.length - 1; i > 0; i--) {
-      const j = Math.floor(this.rand() * (i + 1));
-      const tmp = this.tiles[i];
-      this.tiles[i] = this.tiles[j];
-      this.tiles[j] = tmp;
-    }
-  }
-}