fix: show album artist on featured compilation cards (#979)

* fix: show album artist on featured compilation cards

The 'Also featured on' cards are synthesised from search3 child songs,
which only read the flat `albumArtist` field. Compilation children leave
that empty — the album-artist credit lives in OpenSubsonic's structured
`albumArtists` / `displayAlbumArtist` — so the card fell back to the '—'
placeholder. Carry the structured credit (and the display string) onto
the synthesised album so it resolves a name (and stays navigable when the
server supplies an id).

* docs: changelog for featured-compilation artist credit (#979)

CHANGELOG.md

@@ -872,6 +872,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * Album cards on a **Genre** page split multi-artist credits into individually clickable artist links, matching the rest of the app.
 * On the **Artists** page the `#` index button now holds only names that start with a number; accented and non-Latin names (Æ Ø Å, Chinese, Japanese, Cyrillic, …) move to a new **Other** section instead of the `#` catch-all.
 
+### Artist detail — credit on "Also featured on" compilations
+
+**By [@Psychotoxical](https://github.com/Psychotoxical), PR [#979](https://github.com/Psychotoxical/psysonic/pull/979)**
+
+* Compilation albums under **Also featured on** show their album artist (e.g. *Various Artists*) again instead of a bare `—`, and the credit links to the artist when the server provides one.
+
 ## [1.46.0] - 2026-05-18
 
 > **🙏 Special thanks to [@zz5zz](https://github.com/zz5zz)** for his tireless quirk-spotting and bug reports on the [Psysonic Discord](https://discord.gg/AMnDRErm4u) — several of the polish fixes in this release landed directly off the back of his messages.

src/api/subsonicTypes.ts

@@ -72,6 +72,8 @@ export interface SubsonicSong {
   genre?: string;
   path?: string;
   albumArtist?: string;
+  /** OpenSubsonic: single-string album-artist for display (mirrors `albumArtists` joined). */
+  displayAlbumArtist?: string;
   /** ISRC code when available (e.g., Navidrome) */
   isrc?: string;
   /** Times the track has been played, surfaced by Navidrome's Subsonic API. */

src/hooks/useArtistDetailData.test.ts

@@ -72,6 +72,38 @@ describe('useArtistDetailData — id-gated info', () => {
     await waitFor(() => expect(result.current.info).toEqual({ largeImageUrl: 'B.jpg' }));
   });
 
+  it('keeps the album-artist credit on featured compilation albums', async () => {
+    // "Also featured on" synthesises albums from search3 child songs. A
+    // compilation has no flat `albumArtist` on the child — the credit lives in
+    // OpenSubsonic's structured `albumArtists` (and/or `displayAlbumArtist`).
+    // Dropping it made the card render "—" instead of "Various Artists".
+    vi.mocked(getArtist).mockResolvedValue({ artist: { id: 'A', name: 'A' }, albums: [] } as any);
+    vi.mocked(search).mockResolvedValue({
+      artists: [],
+      albums: [],
+      songs: [
+        {
+          id: 's1', title: 'Track', artistId: 'A', artist: 'A',
+          album: 'A Compilation', albumId: 'comp1', coverArt: 'c1', duration: 100,
+          albumArtists: [{ id: 'va', name: 'Various Artists' }],
+        },
+        {
+          id: 's2', title: 'Other', artistId: 'A', artist: 'A',
+          album: 'Display Only', albumId: 'comp2', coverArt: 'c2', duration: 90,
+          displayAlbumArtist: 'Various Artists',
+        },
+      ],
+    } as any);
+
+    const { result } = renderHook(() => useArtistDetailData('A'));
+
+    await waitFor(() => expect(result.current.featuredAlbums).toHaveLength(2));
+    const structured = result.current.featuredAlbums.find(a => a.id === 'comp1');
+    const displayOnly = result.current.featuredAlbums.find(a => a.id === 'comp2');
+    expect(structured?.artists).toEqual([{ id: 'va', name: 'Various Artists' }]);
+    expect(displayOnly?.artist).toBe('Various Artists');
+  });
+
   it('ignores a late-arriving resolve for a stale id', async () => {
     vi.mocked(getArtist).mockImplementation(async (id) => (
       { artist: { id, name: id }, albums: [] } as any

src/hooks/useArtistDetailData.ts

@@ -150,8 +150,13 @@ export function useArtistDetailData(
             albumMap.set(song.albumId, {
               id: song.albumId,
               name: song.album,
-              artist: song.albumArtist ?? '',
+              // search3 children carry the album-artist credit in OpenSubsonic's
+              // structured `albumArtists` / `displayAlbumArtist` (e.g. "Various
+              // Artists" on compilations), not the flat `albumArtist` field — keep
+              // all of them so the card resolves a name instead of "—".
+              artist: song.albumArtist ?? song.displayAlbumArtist ?? '',
               artistId: '',
+              artists: song.albumArtists,
               coverArt: song.coverArt,
               songCount: 1,
               duration: song.duration,