targetSdk 36 forces edge-to-edge, so the WebView draws behind the system
bars. On Android WebView < 140, env(safe-area-inset-*) wrongly reports 0, so
the app chrome (which only read env()) drew under the status bar (top nav
untappable) and the gesture-nav home indicator (the game's centre Hint button
intercepted; side buttons fine). Capacitor 8's SystemBars core plugin (built
into @capacitor/core, insetsHandling:'css' by default) injects the correct
--safe-area-inset-* values on every WebView; consume them ahead of env():
--tg-safe-*: var(--safe-area-inset-*, env(safe-area-inset-*, 0px))
Web / PWA / Telegram / VK are unchanged (--safe-area-inset-* is unset there,
so it falls back to env()). Verified on-device (Pixel_10 / API 37) via the
injected var — the emulator's auto-updated WebView 149 hides the env() bug,
so the visual alone won't reproduce it.
Score and validate a tentative move on-device instead of a per-arrangement network
round trip. The dawg reader and the validate/score/direction slice of the
scrabble-solver engine are ported to TypeScript (ui/src/lib/dict), pinned
byte-for-byte to the Go engine by a `conformance` CI job (full-dictionary reader
parity plus a battery of plays across every variant and both cross-word rules,
including the inferred orientation). The server stays authoritative — submit_play
re-validates — so the local result is an advisory accelerator only.
- backend: Registry.DictBytes + an authed GET /api/v1/user/dict/{variant}/{version}
(immutable) streaming the pinned per-game dawg; caddy routes /dict to the gateway.
- gateway: a session-gated /dict edge route proxying it; fetchDict on the transport.
- client: the dictionary loads on game open (low priority so it never starves the
game on a slow link; aborted at a 5s cap or when leaving the game), is cached in
IndexedDB (best-effort, self-healing on a rejected blob) and reused across
sessions; a warm-up overlay covers a cold load, then the network preview is the
fallback; a bad-connection breaker stops warming after repeated misses; the move
preview cancels its in-flight request when the tiles change.
- parity generators backend/cmd/{dictgen,validategen} + gated Vitest suites, run in
CI against the release dictionaries. A hidden debug readout lists the cached
dictionaries + breaker state, and its reset clears the cache.
- docs: ARCHITECTURE §5, TESTING, UI_DESIGN, FUNCTIONAL (+ru).
Ilia Denisov