local-dev: rebuild dead sandbox + harden lobby card UX

Three fixes around the dev sandbox end-to-end path. Each one was
flushed out by an actual login walkthrough after the previous
commit.

Backend bootstrap now treats `cancelled`, `finished`, and
`start_failed` as terminal: the per-boot find-or-create skips such
games and provisions a fresh one. Without this, a single bad
shutdown cascade leaves the developer staring at a dead lobby tile
forever (cancelled games don't transition back). Covered by
TestTerminalSandboxStatus.

Tools/local-dev: stop killing engine containers in `make down`. The
runtime treats the disappearance of an engine as a real failure
(cascading the lobby game to `cancelled`); leaving the container
running across `down/up` lets the runtime reconciler re-attach on
the next boot. The teardown happens only in `make clean`, where the
DB is wiped anyway. Compose now also exposes :9090 (authenticated
EdgeGateway listener) on the host so the Vite dev proxy can reach
the Connect-Web surface, and bumps the gateway anti-abuse limits
for `public_misc` so the same surface is not blanket-rejected with
413.

Ui/frontend: the lobby's `My Games` cards are now clickable only
for the playable statuses (`running`, `paused`, `finished`). All
other statuses render as disabled buttons so a click on a draft or
cancelled game no longer drops the user on a 404 — the in-game
view at /games/:id/* doesn't exist before Phase 10 and never makes
sense for a cancelled game. Vite proxy splits the dev targets so
`/api/*` continues to talk to the REST listener and
`/galaxy.gateway.v1.EdgeGateway/*` is routed to the Connect-Web
listener via VITE_DEV_GRPC_PROXY_TARGET (defaults to :9090).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

tools/local-dev/docker-compose.yml

@@ -167,6 +167,16 @@ services:
       GATEWAY_PUBLIC_HTTP_ANTI_ABUSE_SEND_EMAIL_CODE_IDENTITY_RATE_LIMIT_BURST: "1000"
       GATEWAY_PUBLIC_HTTP_ANTI_ABUSE_CONFIRM_EMAIL_CODE_IDENTITY_RATE_LIMIT_REQUESTS: "10000"
       GATEWAY_PUBLIC_HTTP_ANTI_ABUSE_CONFIRM_EMAIL_CODE_IDENTITY_RATE_LIMIT_BURST: "1000"
+      # public_misc class wraps the authenticated EdgeGateway gRPC
+      # endpoints (ExecuteCommand, SubscribeEvents). The gateway's
+      # default for this class is 0 bytes, which rejects every
+      # non-empty body with HTTP 413; override with a generous limit
+      # so browser-side commands carrying signed envelopes go through.
+      GATEWAY_PUBLIC_HTTP_ANTI_ABUSE_PUBLIC_MISC_MAX_BODY_BYTES: "131072"
+      GATEWAY_PUBLIC_HTTP_ANTI_ABUSE_PUBLIC_MISC_RATE_LIMIT_REQUESTS: "10000"
+      GATEWAY_PUBLIC_HTTP_ANTI_ABUSE_PUBLIC_MISC_RATE_LIMIT_BURST: "1000"
+      GATEWAY_PUBLIC_HTTP_ANTI_ABUSE_BROWSER_BOOTSTRAP_MAX_BODY_BYTES: "65536"
+      GATEWAY_PUBLIC_HTTP_ANTI_ABUSE_BROWSER_ASSET_MAX_BODY_BYTES: "65536"
       GATEWAY_AUTHENTICATED_GRPC_ANTI_ABUSE_IP_RATE_LIMIT_REQUESTS: "10000"
       GATEWAY_AUTHENTICATED_GRPC_ANTI_ABUSE_IP_RATE_LIMIT_BURST: "1000"
       GATEWAY_AUTHENTICATED_GRPC_ANTI_ABUSE_SESSION_RATE_LIMIT_REQUESTS: "10000"
@@ -177,6 +187,10 @@ services:
       GATEWAY_AUTHENTICATED_GRPC_ANTI_ABUSE_MESSAGE_CLASS_RATE_LIMIT_BURST: "1000"
     ports:
       - "8080:8080"
+      # Authenticated EdgeGateway connect-web/gRPC listener. The
+      # browser reaches it via the Vite dev proxy in
+      # ui/frontend/vite.config.ts.
+      - "9090:9090"
     volumes:
       - ./keys/gateway-response.pem:/run/secrets/gateway-response.pem:ro
     networks: