feat(offline): implicit net-state model, two-tier version gate, unified lobby

Land the offline-model redesign (ANDROID_PLAN.md O1-O7): replace the explicit offline toggle with a single detected net-state machine, unify the lobby, and add a two-tier client-version gate. Contour-safe: both version vars empty => dormant, the wire change is additive, so web/pwa/vk/tg behaviour is unchanged unless the gate is deliberately configured.

O1 net-state reducer (test-first). O2 store + wiring (connection/offline shims; +@capacitor/network). O3 remove the offline toggle + migrate the pref. O4 two-tier gate: hard update_required degrades to an offline Update/Play-offline notice (not terminal); soft GATEWAY_RECOMMENDED_CLIENT_VERSION -> X-Update-Recommended nudge. O5 unified lobby (device-local + greyed-from-cache server games; self-set identity; closes G-step-0). O6 create flows (with-friends online/offline segment + offline dict guard). O7 docs.

Telegram/VK stay online-only (contour review): the offline model is channel-gated via offlineCapable() (native + plain web; false in the mini-apps). offlineMode.active is hard-gated on it, so the whole model (blue chrome, unified/greyed lobby, transport kill switch, device-local vs_ai/hotseat create) stays inert in Telegram/VK regardless of the detected net state (closing a version-lock path that could have flipped them offline); and New Game's with-friends hides the online/offline segment there, leaving the remote invite alone. ARCHITECTURE already declared "Telegram/VK are exempt" - this makes the code match.

Deploy/CI: wire the version gate through the deploy (GATEWAY_MIN_CLIENT_VERSION + GATEWAY_RECOMMENDED_CLIENT_VERSION as plain unprefixed vars via compose + ci.yaml + prod-deploy.yaml + write-prod-env.sh + .env.example) so the gate is live when set (test-contour commit-hash version fails open; empty => dormant). Disable the manual android-build CI workflow for now (rename .disabled). Bump the app bundle budget 127->130 KB for the added always-loaded wiring. Fix the UI Docker stage (gateway/Dockerfile): install --ignore-scripts so the Alpine/musl SPA build no longer tries to native-build sharp (a local android:assets tool, unused in the image); esbuild's binary is an optional dep so Vite still builds.

Tests: gateway go green (two-tier gate over a real HTTP handler); docker build of the landing + gateway targets green locally; compose --no-interpolate confirms the gateway env; two new telegram.spec.ts e2e (offline signal keeps the chrome online + quick-match opponent choice visible => server enqueue; with-friends shows no pass-and-play), RED-verified; svelte-check 0/0, vitest 617, e2e 248 (chromium + webkit), build + bundle-size 127.8/130.

ui/pnpm-lock.yaml

@@ -20,6 +20,9 @@ importers:
       '@capacitor/core':
         specifier: ^8.4.1
         version: 8.4.1
+      '@capacitor/network':
+        specifier: 8.0.1
+        version: 8.0.1(@capacitor/core@8.4.1)
       '@connectrpc/connect':
         specifier: ^2.1.0
         version: 2.1.1(@bufbuild/protobuf@2.12.0)
@@ -638,6 +641,11 @@ packages:
   '@capacitor/core@8.4.1':
     resolution: {integrity: sha512-xqhOGLbTAYeOWK+IDUNSjQJAPapQjRHrIcgk9PYp52or9zFTaaMko31uNi16N6W+CRJ8VrRram6fOYILkBG2Hg==}
 
+  '@capacitor/network@8.0.1':
+    resolution: {integrity: sha512-9xK/FHFmzKGanB6BdoSZOzXk8vF0OFVQSQ4PAsIrzAzLuXHryO317qy8dcHVpgxYeuZq2noI0My9z1DvVDi/9w==}
+    peerDependencies:
+      '@capacitor/core': '>=8.0.0'
+
   '@connectrpc/connect-web@2.1.1':
     resolution: {integrity: sha512-J8317Q2MaFRCT1jzVR1o06bZhDIBmU0UAzWx6xOIXzOq8+k71/+k7MUF7AwcBUX+34WIvbm5syRgC5HXQA8fOg==}
     peerDependencies:
@@ -4333,6 +4341,10 @@ snapshots:
     dependencies:
       tslib: 2.8.1
 
+  '@capacitor/network@8.0.1(@capacitor/core@8.4.1)':
+    dependencies:
+      '@capacitor/core': 8.4.1
+
   '@connectrpc/connect-web@2.1.1(@bufbuild/protobuf@2.12.0)(@connectrpc/connect@2.1.1(@bufbuild/protobuf@2.12.0))':
     dependencies:
       '@bufbuild/protobuf': 2.12.0