* 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)
Each src/locales/<lang>.ts (~1800 LOC) becomes a folder src/locales/<lang>/
with one module per i18n namespace (44 each) plus an index.ts barrel that
reassembles <lang>Translation in the original key order.
Mechanical, script-driven split with a JSON round-trip check: every
locale object is byte-identical to its pre-split form. i18n.ts is
unchanged — './locales/<lang>' now resolves to the folder index.
The per-namespace settings.ts files land ~440-460 LOC; a single i18n
namespace is the natural, non-arbitrary split unit for a flat string
table, so they are intentionally left whole.
Frank Stellmacher