docs: refresh readme status + dashboard screenshots

- Project status -> Phase 27 done, Phase 28 (Android app) in progress
- Added Android companion app to feature list
- Regenerated pics/ui.png (mobile 390px + desktop 1280px dashboards)

readme.md

@@ -62,6 +62,9 @@ Dashboard — mobile (390 px) and desktop (1280 px):
   create/rotate/delete keys and one-time API-key reveal.
 - **Reverse geocoding** — `/api/geocode` uses `reverse_geocoder` offline (no internet needed),
   upgrades to Nominatim street-level when online. LRU-cached. Results pre-loaded for trip scrubbing.
+- **Android companion app** — native Kotlin app in `android/` (Phase 28, in progress). Dual-network
+  on the phone: browse + download dashcam clips over the car's WiFi, relay uploads over cellular.
+  Networking gate + dashcam browser/download verified on a Pixel; cellular upload in progress.
 - **Offline web UI** — Flask, Bootstrap 5, Socket.IO, Chart.js, Leaflet. All assets served
   locally. Responsive with collapsible sidebar and mobile bottom nav.
 - **Headless deployment** — systemd service with auto-restart, 10-second hardware watchdog, and
@@ -173,9 +176,11 @@ rm db/sql/quoije_Yaris2013.db
 
 ## Project status
 
-The Pi app, remote server, and device sync are all implemented and verified on real
-hardware. Phase 25 (road test) is complete; Phase 26 (12 bug fixes) is complete.
-Phase 27 (feature additions) is up next with 7 candidates.
+The Pi app, remote server, device sync, and the Android companion app are implemented and
+verified on real hardware. Phase 25 (road test) ✅, Phase 26 (road-test bug fixes — 13 bugs) ✅,
+Phase 27 (feature additions — DTC history sync, manual odometer, hotspot settings + 5GHz WiFi
+swap, trip-history odometer) ✅. Phase 28 (Android companion app) 🚧 in progress — networking
+gate + dashcam browser/download done, cellular upload queue in progress.
 
 Full phase history and verification notes live in [PLAN.md](./PLAN.md). Open issues in
 [BUGS.md](./BUGS.md). Feature requests in [FEATURES.md](./FEATURES.md).