fix: owned albums wrongly shown as "Unvollständig 1/0" on artist page

Deezer's /artist/{id}/albums list omits nb_tracks, so the album total read as 0 and every
owned album (e.g. N!GHT's "Moonlight"/"Yume") was classified as incomplete "1 / 0 Tracks".

- Web (detail.js): resolve the real Deezer track count via the album endpoint for MATCHED
  (owned) albums only — a couple of calls, not the whole discography — and treat an unknown
  total as complete. Genuine partials still work when the true count is known.
- Android (categorizeAlbums): mark partial only when a known total exceeds what you own;
  unknown total counts as complete (never a false "1 / 0").
- CHANGELOG: documented the fix; corrected the Android lyrics known bug (auto-scroll follows
  playback but isn't smooth — it jumps rather than glides). SW ns-v55.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

CHANGELOG.md

@@ -78,6 +78,9 @@ Big change: **the entire metadata/search stack moved from Apple's iTunes to Deez
 - **Android** — **Global 30s-preview control bar**: a preview started on an album/artist/Explore screen used to keep playing with no way to stop it once you navigated away (the local artist page had its *own* uncontrollable preview too). All previews now run through one app-level player with a bar (above the mini player, on every screen) to pause/resume/stop it; starting real playback cancels the preview
 - **Backend** — Unit tests for the Deezer mapping/matching logic (`backend/test/deezer.test.js`, run with `npm test`), incl. per-track numbering, mixed-artist album-artist stability, explicit flags and the Japanese-title match guard. A live smoke test runs with `RUN_LIVE=1`
 
+### Fixed
+- **Web + Android** — Owned albums were wrongly shown as **"Unvollständig  1 / 0 Tracks"** on the artist page. Deezer's `/artist/{id}/albums` list omits `nb_tracks`, so the total read as 0 and every matched album looked incomplete. Web now resolves the real track count from the Deezer album endpoint for **matched (owned) albums only** and treats an unknown total as complete; Android treats an unknown total as complete (never a false partial)
+
 ### Notes
 - Deploy: `git pull`, then rebuild the frontend (`docker compose up -d --build novasonic-frontend`) and restart the backend (`docker compose restart novasonic-backend`). Service worker bumped to `ns-v54`
 - Titles a user picked stay as chosen; only derived fields (album, album-artist, genre, year, artwork) follow Deezer
@@ -412,7 +415,7 @@ Primary causes identified:
 - **Web + Android** — yt-dlp backend update / maintenance
 
 ### Known Bugs
-- **Android (lyrics)** — Synced-lyrics **auto-scroll still does not follow playback**: the current line is highlighted but the list doesn't scroll to keep it centered, so you have to scroll by hand. Web autoscroll works. Not yet fixed.
+- **Android (lyrics)** — Synced-lyrics auto-scroll is **not smooth**: it follows playback and highlights the right line, but the list jumps to it rather than gliding. Web autoscroll is smooth. Not yet fixed.
 - **Web (PWA, desktop)** — The Windows media tile (SMTC) briefly closes and reopens when skipping tracks. Swapping the `<audio>` element's source leaves a momentary gap with no active media output, so Windows tears down and rebuilds the tile. A real fix needs one continuous source (MSE), which requires streaming an MSE-compatible format. The native Android app is unaffected. (The two-element gapless handoff added in 1.1 makes skips effectively instant but does **not** fix this — switching elements still ends and restarts the OS session.)
 - **Backend (download)** — The duplicate check requires at least a `firstArtist` folder match. If the same song was previously stored under a very different artist name (e.g. before an iTunes-name fix), it will not be detected as a duplicate and will be re-downloaded.
 - **Backend (metadata/sorting)** — MusicBrainz `release['artist-credit']` is often absent in the standard recording search response (requires `inc=artist-credits` which can slow the endpoint). The albumArtist field from MusicBrainz autofill may fall back to the recording artist rather than the release artist.