fix(catalog): group Recently Added tracks into albums in the client

Recently Added still listed a newly-imported album one song at a time.
GroupItems=true asks Jellyfin to collapse leaves into their container, but the
server only groups a track whose parent chain actually resolves a MusicAlbum,
and older servers ignore the parameter outright — so the raw leaves kept
arriving. The home row passes no library, so the offline branch (which collapses
in SQL) contributes nothing there and the server's answer *is* the row.

Group again in the online repository, so the shape of the row is a property of
this app rather than of the server it happens to be talking to:

- A track naming an album_id collapses into one MusicAlbum card, placed where
  the first of its tracks stood so recency order survives. The card keeps the
  artwork, album name and artists; track number, duration, album link, streams
  and per-track user data stay with the leaf.
- If the server did return the album row, that row wins and its tracks are
  dropped — it carries detail a track-built stand-in cannot.
- Tracks with no album, movies, episodes and folders pass through untouched.
- Collapsing only shrinks a listing, so the request over-fetches 3x and
  truncates afterwards; otherwise one 14-track import left the row nearly empty.

Episodes are still grouped only by the server, so a freshly added season can
flood the row the same way — same fix applies if it shows up.

docs/requirements.md

@@ -790,6 +790,10 @@ Internal architecture, components, and application logic.
 | UT-238 | The last episode of a season rolls over into the first of the next, skips an empty season on the way, and still stops there when the sleep timer says so | DR-263 | Done |
 | UT-239 | An episode watched to the end is not the current episode: not when the server's Next Up still names it (the stale answer is skipped in favour of the one after it), and not offline, where it counts as watched in the furthest-watched scan | DR-264 | Done |
 | UT-240 | Caching a server result mirrors its played flag locally — as synced, never invented for an item that carries no user data, and never over an unsynced local toggle | DR-264 | Done |
+| UT-241 | A newly-imported album reads as one album card, not one card per song: three tracks sharing an album id collapse into a single `MusicAlbum` entry that opens the album, keeps its artwork and album artist, drops track-only detail (track number, duration, album link), and takes the position of the first of its tracks so recency order and the neighbouring movie survive | JA-016 | Done |
+| UT-242 | When the server did group, its own album row wins — its overview and detail survive and the tracks it also returned add no second card for the same album | JA-016 | Done |
+| UT-243 | A track that names no album has no container to collapse into and stays a track, the same way a movie does | JA-016 | Done |
+| UT-244 | Recently Added over-fetches before collapsing, so folding one 14-track import together does not leave the row nearly empty | JA-016 | Done |
 
 ### Integration Tests