docs: remove BACKLOG.md

Future work is tracked as Forgejo issues now; the standalone backlog file was
redundant. AGENTS.md and README.md no longer reference it.

BACKLOG.md

@@ -1,85 +0,0 @@
-# Backlog
-
-Status vocabulary: `todo` · `doing` · `done`.
-
-## v0.1 — MVP (implemented, pending device sign-off)
-
-| # | Item | Status | Notes |
-|---|------|--------|-------|
-| 0 | Ask for credentials + instance URL, store safely | done | Login screen → `users/token`; tokens + OAuth client creds in EncryptedSharedPreferences; refresh single-flight; show/paste password helpers; debug-only seed intent for automation |
-| 1 | Local videos + user's videos incl. private/internal | done | Home rows (SmartTube-style) + "My videos" grid with privacy badge; internal (instance-member) videos appear in listings too |
-| 2 | Local channels | done | MVP = user's own channels (`accounts/{me}/video-channels`); search-based local listing needs non-empty query — revisit in v0.2 |
-| 3 | Search local videos | done | Own screen in sidebar |
-| 4 | Subscription videos | done | Verified incl. remote (federated) channels |
-| 5 | Watch history (server) | done | read-only grid |
-| 6 | Playback + report to server history | done | ExoPlayer HLS w/ `videoFileToken` for non-public media; watching reports every ~20 s verified server-side; resume position retrievable |
-| 7 | Channel videos view (channel page) | done | Banner + avatar + name + video count header, paged video grid; opened from the Channels screen and the player's channel icon |
-
-## Discussed but deferred (2026-10-12, while reworking the player controls)
-
-- Like/dislike display: counts are in the video detail DTO; rating (own like via
-  `PUT /api/v1/videos/{uuid}/rating`) is a write op — display first, rating later.
-- Subtitles: `GET /api/v1/videos/{uuid}/captions` → Media3 `SubtitleConfiguration`
-  on the player; language selection in the controls overlay.
-
-## Next up (v0.2+)
-
-UX-review findings (Claude Opus 5.5, 2026-10-10) — implemented already: focus + scroll
-memory (player-as-overlay, per-destination grid state), 2-column grid, visible focus
-(tv-material Cards with scale/border), relative dates on cards, privacy badge only on
-My videos, password reveal + paste, overscan margins, sign-out entry, neutral form
-focus colors, always-focusable Sign in with inline validation. Deferred from review:
-
-- "Continue watching" refinement: auto-remove finished entries, exact resume (start
-  playback at `userHistory.currentTime`, show "Resuming at 1:23" toast).
-- Trending/featured row on Home; rows per subscribed channel (SmartTube-like).
-- Video progress bars in ALL lists (needs per-video history merge; currently only
-  Continue-watching has them).
-- Search-as-overlay vs sidebar entry; autoplay focus previews; playback speed;
-  auto-next after video end; subtitles (captions) support; phone-QR-assisted login.
-- Drawer restructure proposal: Home / Channels (subs first) / Search / History /
-  Account — decide together with merged-feed item below.
-- Unified "accessible videos" feed: merge public-local + own private into one paged,
-  deduplicated list (v0.1 keeps Home rows + My videos).
-- Global local-channels browse (search endpoint rejects empty queries) — consider
-  `GET /api/v1/video-channels` paged without search + host filter, or `search/video-*`.
-- Logout / switch account: sign-out entry exists; add switch-account (re-login screen
-  without losing scroll state).
-- Release build: enable `minifyEnabled` + R8 rules, decide signing/versioning.
-- Thumbnails of private/internal videos may 404 — on some instances thumbnail
-  paths are publicly readable while on others they need auth; add a fallback
-  poster only if needed.
-- Security note (verified live against tube.jeena.net): some instances serve
-  non-public media / thumbnails from object storage with only URL-based access
-  control. The app must not rely on that laxness; always send auth headers
-  / file tokens for non-public media. (Detail intentionally omitted from the
-  public repo — report instance-specific findings privately.)
-- Verify `searchTarget=local` channel search behaves well for instances without
-  federation; consider `search/video-channels` endpoint as an alternative.
-- Release build: enable `minifyEnabled` + R8 rules, decide on signing, versioning scheme.
-- Verify `searchTarget=local` channel search behaves well for instances without
-  federation; consider `search/video-channels` endpoint as an alternative.
-- (Verified 2026-10-10 via the test account) history subscriptions + watching endpoints
-  behave as documented; upload seeding uses **flat multipart form fields** on
-  `/api/v1/videos/upload` (legacy), not a metadata JSON part — only relevant for
-  seeding test data, the app itself doesn't upload.
-- Error UX: friendlier messages (offline, instance down, wrong credentials vs. expired
-  token → re-login screen), retry buttons.
-- i18n: move user-facing strings to `strings.xml`, consider German + English.
-- Video detail screen (description, tags, views, duration, channel page link).
-
-## Longer term
-
-- Multiple saved instances / switching between them.
-- Live streams playback (HLS live), premieres.
-- Subtitles/captions selection.
-- Downloads for offline watching (probably limited to public videos).
-- Comments viewing (read-only) — needs moderation-safe UI thinking.
-- `BACKLOG` triage rhythm: keep "Next up" ≤ 8 items.
-- Out of scope by user request (do not implement without asking): uploading, editing,
-  creating channels/users. (Stale members of this list — subscribing, playlists
-  viewing/creation and rating — shipped with the player action row in v0.1; playlist
-  deletion was requested and added later, see below.)
-- Delete own playlist: long-press OK on a playlist row (key-repeat) → confirmation
-  dialog → `DELETE /api/v1/video-playlists/{id}`; toggle stays on short press. Requested
-  2026-10-13.