docs: update Phase 28.1/28.2 status in PLAN.md + android/plan.md

- PLAN.md: Phase 28 header now shows 28.1 ✅, 28.2 ✅, 28.3–28.7 pending
- PLAN.md: added 28.1 gate-pass + 28.2 dashcam browser/download summaries
- android/plan.md: 28.2 rewritten from NOT STARTED to DONE with real
  implementation details (PiApi, DashcamScreen, DashcamViewModel,
  WorkManager DownloadWorker, Coil thumbnails, bottom nav)

PLAN.md

@@ -1965,11 +1965,30 @@ tracked in FEATURES.md.
 2. **FEAT-02** — QR / claim-code device pairing flow (medium)
 3. **FEAT-04** — Replace SIM868 2G GSM with 4G LTE modem (large)
 
-### Phase 28: Native Android companion app — 🚧 IN PROGRESS (low priority, always last)
+### Phase 28: Native Android companion app — 🚧 IN PROGRESS (28.1 ✅, 28.2 ✅, 28.3–28.7 pending)
 **Renumbered from former Phase 26 on 2026-08-10 to make room for the road-test bug-fix phase.
 Renumbered to Phase 28 on 2026-08-11 to make room for Phase 27 feature additions. Planning
-completed 2026-08-11; sub-phase 28.1 scaffold begins. Detailed implementation plan in
-[android/plan.md](android/plan.md).**
+completed 2026-08-11. Detailed implementation plan in [android/plan.md](android/plan.md).**
+
+**28.1 — Scaffold + networking gate ✅ DONE (2026-08-12)**
+- Project created in `android/` (Kotlin + Compose, Gradle KTS, version catalog).
+- OkHttp + Retrofit networking layer with `PiApi` and `ServerApi` interfaces.
+- `NetworkBinder.kt` discovers WiFi + cellular networks.
+- `DualNetworkTestScreen` with simultaneous "Test Both" button.
+- **Gate passed on real Pixel (2026-08-12):** Android OS routes `10.42.0.1` through WiFi
+  and `yaris.ceaf.dev` through cellular automatically — per-socket `Network.bindSocket()`
+  not needed. Both networks work simultaneously.
+
+**28.2 — Dashcam browser + WiFi download ✅ DONE (2026-08-12)**
+- `PiApi` extended: `listVideos`, `getVideoFile` (streaming), `getThumbnail`, `deleteVideo`.
+- DTOs: `VideoListResponse`, `VideoFile`, `ConvertProgress`.
+- `DashcamScreen`: `LazyColumn` with thumbnails (Coil), file size, date, upload status.
+- `DashcamViewModel`: Retrofit-backed video list + download to phone storage + delete local copy.
+- Downloads via `WorkManager` foreground service: `DownloadWorker` with notification +
+  `setProgressAsync()`, `ActiveDownload` state via `LiveData`. Survives screen lock/background.
+  FGS type `FOREGROUND_SERVICE_TYPE_DATA_SYNC` for Android 14+.
+- Bottom nav: Dashcam tab + Test tab.
+- **Verified:** video list loads from real Pi over "yaris 911" hotspot on the owner's Pixel.
 
 #### Why native (not web, not PWA)
 Revives the phone-relay goal (Phase 11/12) properly this time. The Phase 11 update proved

android/plan.md

@@ -100,36 +100,29 @@ android/
 - [ ] Persist credentials after successful test
 - [ ] Commit: `feat: encrypted credential storage + first-launch flow`
 
-### 28.2 — Dashcam browser + download ⬜ NOT STARTED
+### 28.2 — Dashcam browser + download ✅ DONE (2026-08-12)
 **Depends on: 28.1 (networking layer + credentials).**
 
-#### 28.2.1 — Pi API data layer
-- [ ] Retrofit interface for Pi endpoints:
-  - `GET /api/local-video/list` → `List<LocalVideoFile>` (relative_path, size, mtime, sha256, uploaded, thumbnail_url)
-  - `GET /api/local-video/file?path={relpath}` → `ResponseBody` (streaming, supports Range)
-  - `GET /api/local-video/thumbnail?path={relpath}` → `ResponseBody` (JPEG bytes)
-- [ ] Data classes for API responses (`LocalVideoFile`, etc.)
-- [ ] Repository: `VideoRepository` wrapping Pi API calls + Room cache
-- [ ] Commit: `feat: Pi video API data layer`
+#### What was built
+- **Pi API extension** (`PiApi.kt`): `listVideos()` → `VideoListResponse`, `getVideoFile()`
+  (streaming `ResponseBody`), `getThumbnail()` (JPEG bytes), `deleteVideo()`
+- **DTOs:** `VideoListResponse`, `VideoFile` (relative_path, size, mtime, sha256, uploaded,
+  thumbnail_url), `ConvertProgress`
+- **DashcamScreen:** `LazyColumn` of imported Pi videos with thumbnails via Coil async image
+  loader, file size, date, upload status badge (Uploaded/Pending)
+- **DashcamViewModel:** manages video list state, download to phone storage, delete local copy,
+  conversion progress polling
+- **Downloads via WorkManager:** `DownloadWorker` foreground service with notification +
+  `setProgressAsync()` for inline progress bar. `ActiveDownload` state tracked via WorkManager
+  `LiveData` observation. Survives screen lock / background. FGS type declared as
+  `FOREGROUND_SERVICE_TYPE_DATA_SYNC` for Android 14+.
+- **Downloads tab:** progress bar + % for in-flight downloads, downloaded files list
+- **Bottom navigation:** Dashcam tab + Test tab
+- **Verified:** video list loads from real Pi over "yaris 911" hotspot on the owner's Pixel
 
-#### 28.2.2 — Video file list UI
-- [ ] Compose screen: LazyColumn of video files
-- [ ] Each row: thumbnail (coil3 async image loader), filename, size, upload status badge
-- [ ] Sort controls: by name, size, date
-- [ ] Selection: checkboxes + "Select all" / "Clear"
-- [ ] Pull-to-refresh (re-fetches `/api/local-video/list`)
-- [ ] Empty state: "No imported videos on the Pi"
-- [ ] Error state: "Cannot reach Pi" with retry button
-- [ ] Commit: `feat: video file list screen`
-
-#### 28.2.3 — WiFi download
-- [ ] Room entity: `DownloadedFile` (relative_path, sha256, local_uri, size, downloaded_at)
-- [ ] Room DAO: insert, query, delete downloaded files
-- [ ] Download manager: OkHttp `Call` with Range header support, writes to app external storage
-- [ ] Progress tracking: `Flow<DownloadProgress>` emitting bytes downloaded / total
-- [ ] UI: download button per file → progress bar → "Downloaded" checkmark
-- [ ] Resume: if download interrupted, resume from last byte (Range: bytes=X-)
-- [ ] Commit: `feat: WiFi download with progress + resume`
+#### Commits
+- Phase 28.2 — dashcam video browser + WiFi download
+- fix: downloads use WorkManager foreground service + inline progress
 
 ### 28.3 — Cellular upload ⬜ NOT STARTED
 **Depends on: 28.2 (files on phone local storage).**