feat(tracklist): play count, last played, BPM columns + Song Info rows (#730)

* feat(tracklist): play count, last played, and BPM columns (#516)

Adds three opt-in columns to Album / Playlist / Favorites tracklists,
plus the same fields in the Song Info modal. Picks up Navidrome's
existing `playCount` / `played` / `bpm` from the Subsonic response — no
new API calls.

- `SubsonicSong` gains `playCount`, `played`, `bpm` (already populated
  by Navidrome's Subsonic API, just unmapped in the TS model).
- `albumTrackListHelpers.COLUMNS`, `PL_COLUMNS` (PlaylistDetail), and
  `FAV_COLUMNS` (Favorites) get the three new entries. Genre also added
  to the playlist column set for parity with the other two lists.
- Render uses `.track-duration` (12px tabular, centered, muted) for the
  numeric stats and `.track-genre` (11px text, muted) for the relative
  last-played timestamp via the existing `formatLastSeen` helper.
- Sort logic extended in `playlistDisplayedSongs`,
  `useAlbumDetailSort`, and `useFavoritesSongFiltering` for the three
  new keys.
- `SongInfoModal` gets matching rows (BPM / Play count / Last played).
- `useTracklistColumns.gridTemplate` / `gridMinWidth` fall back to the
  ColDef's `defaultWidth` when a visible column has no saved width
  (newly added column on an old prefs blob would otherwise emit
  `undefinedpx` and collapse the row layout until reset-to-defaults).
- BPM cells skip the rendering when Navidrome returns 0 (default for
  untagged files) — show `—` instead of `0`.
- i18n: `albumDetail.trackPlayCount / trackLastPlayed / trackBpm` and
  `songInfo.playCount / lastPlayed / bpm` in all 9 locales.

Suggested by jbigginswyl (#516).

* docs(changelog): tracklist Plays / Last played / BPM columns (#730)

src/locales/ro/albumDetail.ts

@@ -27,6 +27,9 @@ export const albumDetail = {
   trackAlbum: 'Album',
   trackArtist: 'Artist',
   trackGenre: 'Gen',
+  trackPlayCount: 'Redări',
+  trackLastPlayed: 'Ultima redare',
+  trackBpm: 'BPM',
   trackFormat: 'Format',
   trackFavorite: 'Favorit',
   trackRating: 'Rating',

src/locales/ro/songInfo.ts

@@ -8,6 +8,9 @@ export const songInfo = {
   genre: 'Gen',
   duration: 'Durată',
   track: 'Piesă',
+  bpm: 'BPM',
+  playCount: 'Număr de redări',
+  lastPlayed: 'Ultima redare',
   format: 'Format',
   bitrate: 'Bitrate',
   sampleRate: 'Rată de Sample',