fix(composers): hide performer-only artists with zero composer credits (#963)

* fix(composers): drop Navidrome role rows with zero composer albums

Navidrome can list performer-only artists under role=composer with
stats.composer.albumCount 0; filter them out of the Composers catalog
so search no longer surfaces ghost entries like Apollo 440.

* docs(changelog): credit zunoz on Psysonic Discord for PR #963

src/utils/library/composerBrowse.test.ts

@@ -0,0 +1,17 @@
+import { describe, expect, it } from 'vitest';
+import { filterArtistsWithRoleAlbumCredits } from './composerBrowse';
+
+describe('filterArtistsWithRoleAlbumCredits', () => {
+  it('removes artists with zero role-scoped album count', () => {
+    const artists = [
+      { id: '1', name: 'Bach', albumCount: 12 },
+      { id: '2', name: 'Apollo 440', albumCount: 0 },
+    ];
+    expect(filterArtistsWithRoleAlbumCredits(artists)).toEqual([artists[0]]);
+  });
+
+  it('removes artists when role album count is missing', () => {
+    const artists = [{ id: '1', name: 'Ghost', albumCount: undefined }];
+    expect(filterArtistsWithRoleAlbumCredits(artists)).toEqual([]);
+  });
+});

src/utils/library/composerBrowse.ts

@@ -0,0 +1,10 @@
+import type { SubsonicArtist } from '../../api/subsonicTypes';
+
+/**
+ * Navidrome's `/api/artist?role=composer` can include artists whose
+ * `stats.composer.albumCount` is zero (performer-only credits with no composer
+ * tags). Drop them from the Composers browse catalog.
+ */
+export function filterArtistsWithRoleAlbumCredits(artists: SubsonicArtist[]): SubsonicArtist[] {
+  return artists.filter(a => (a.albumCount ?? 0) > 0);
+}