fix(album-card): per-artist click on multi-artist albums (#767)

* refactor(album): rename SubsonicAlbum.albumArtists to artists per OpenSubsonic spec

The OpenSubsonic AlbumID3 object exposes structured album-artist credits as
`artists` (not `albumArtists`); psysonic's internal type used the wrong name,
so `album.albumArtists` was always undefined on the Subsonic responses
Navidrome returns. `deriveAlbumHeaderArtistRefs` therefore never hit its
album-level branch — only the song-level fallback was carrying the multi-
artist split on the album-detail header.

- Rename the field on `SubsonicAlbum` and add the spec-defined `displayArtist`
  string alongside it.
- Extract `deriveAlbumArtistRefs(album)` for the common case where only the
  album object is available (cards, rails); `deriveAlbumHeaderArtistRefs`
  now uses it after the song-level fallback. The song-level `albumArtists`
  field is unchanged (the spec does name it that way on child songs).
- Tests cover both helpers and the legacy `artist` + `artistId` fallback.

* fix(album-card): per-artist click on multi-artist albums

The artist subtitle under an album card rendered the full `album.artist`
string ("Melvins • Napalm Death") as a single link that always navigated to
`album.artistId`. On the artist-detail page that id is the page's own
artist — so the click resolved to the URL the user was already on and the
router silently no-op'd, with no visible effect.

Render through the existing `OpenArtistRefInline` component instead, fed
from the structured `artists` array via `deriveAlbumArtistRefs`. Each
artist becomes its own ·-separated link; the single-artist fallback is the
same legacy `artist` + `artistId` pair as before, so the behaviour on
servers that don't expose the structured field is unchanged.

* docs(changelog): note PR #767 under Fixed in v1.46.0

src/utils/album/deriveAlbumHeaderArtistRefs.test.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from 'vitest';
-import { deriveAlbumHeaderArtistRefs } from './deriveAlbumHeaderArtistRefs';
+import { deriveAlbumArtistRefs, deriveAlbumHeaderArtistRefs } from './deriveAlbumHeaderArtistRefs';
 import type { SubsonicAlbum } from '../../api/subsonicTypes';
 import { makeSubsonicSong } from '@/test/helpers/factories';
 
@@ -12,16 +12,35 @@ const baseAlbum = (): SubsonicAlbum => ({
   duration: 100,
 });
 
-describe('deriveAlbumHeaderArtistRefs', () => {
-  it('prefers album-level albumArtists when present', () => {
+describe('deriveAlbumArtistRefs', () => {
+  it('prefers the OpenSubsonic `artists` array when present', () => {
     const album: SubsonicAlbum = {
       ...baseAlbum(),
-      albumArtists: [{ id: 'a1', name: 'One' }, { id: 'a2', name: 'Two' }],
+      artists: [{ id: 'a1', name: 'One' }, { id: 'a2', name: 'Two' }],
     };
-    expect(deriveAlbumHeaderArtistRefs(album, [])).toEqual(album.albumArtists);
+    expect(deriveAlbumArtistRefs(album)).toEqual(album.artists);
   });
 
-  it('falls back to the first song with albumArtists', () => {
+  it('uses legacy artist + artistId when no structured refs', () => {
+    expect(deriveAlbumArtistRefs(baseAlbum())).toEqual([{ id: 'ar-first', name: 'Joined A / B' }]);
+  });
+
+  it('omits id when artistId is blank', () => {
+    expect(deriveAlbumArtistRefs({ ...baseAlbum(), artistId: '   ', artist: 'Solo' }))
+      .toEqual([{ name: 'Solo' }]);
+  });
+});
+
+describe('deriveAlbumHeaderArtistRefs', () => {
+  it('prefers the album-level `artists` array when present', () => {
+    const album: SubsonicAlbum = {
+      ...baseAlbum(),
+      artists: [{ id: 'a1', name: 'One' }, { id: 'a2', name: 'Two' }],
+    };
+    expect(deriveAlbumHeaderArtistRefs(album, [])).toEqual(album.artists);
+  });
+
+  it('falls back to the first song with `albumArtists`', () => {
     const album = baseAlbum();
     const songs = [
       makeSubsonicSong({

src/utils/album/deriveAlbumHeaderArtistRefs.ts

@@ -4,21 +4,31 @@ function nonEmpty(refs: SubsonicOpenArtistRef[] | undefined): refs is SubsonicOp
   return !!refs && refs.length > 0;
 }
 
+/**
+ * Structured album-artist credits without the album-detail Song fallback.
+ * Used wherever only the album object is available (cards, rails). Prefers the
+ * OpenSubsonic `artists` array; falls back to legacy `artist` + `artistId`.
+ */
+export function deriveAlbumArtistRefs(album: SubsonicAlbum): SubsonicOpenArtistRef[] {
+  if (nonEmpty(album.artists)) return album.artists;
+  const name = album.artist?.trim() || '—';
+  const id = album.artistId?.trim();
+  return id ? [{ id, name }] : [{ name }];
+}
+
 /**
  * OpenSubsonic album credits for the album-detail header.
- * Prefer `albumArtists` on the album payload, then on any child song (Navidrome
- * often attaches the structured list only on songs); fall back to legacy
- * `artist` + `artistId` strings.
+ * Prefer the album's `artists` array, then any child song's `albumArtists`
+ * (some servers only attach the structured list at song level); fall back to
+ * the legacy `artist` + `artistId` strings.
  */
 export function deriveAlbumHeaderArtistRefs(
   album: SubsonicAlbum,
   songs: SubsonicSong[],
 ): SubsonicOpenArtistRef[] {
-  if (nonEmpty(album.albumArtists)) return album.albumArtists;
+  if (nonEmpty(album.artists)) return album.artists;
   for (const s of songs) {
     if (nonEmpty(s.albumArtists)) return s.albumArtists;
   }
-  const name = album.artist?.trim() || '—';
-  const id = album.artistId?.trim();
-  return id ? [{ id, name }] : [{ name }];
+  return deriveAlbumArtistRefs(album);
 }