fix: RC3 queue link underline, genre album artist split, Artists "Other" bucket (#977)

* fix: RC3 queue link underline, genre album artist split, Artists "Other" bucket

Three zunoz reports, one change:

- Queue now-playing card: the artist and album links now underline on hover
  (not just recolour), matching clickable names everywhere else. The album
  link sits on .queue-current-sub itself; artist links are nested .is-link
  spans — both selectors covered.

- Genre album cards split multi-artist credits into individual links like the
  rest of the app. Root cause was the local-index genre query hardcoding NULL
  for the album raw_json column, so OpenSubsonic artists[] never reached the
  card and it fell back to the flat "A • B" single link. Select a.raw_json
  instead (parity with the All Albums / advanced-search album queries).

- Artists page alphabet index: # is now digits-only, and a new "Other" bucket
  collects accented Latin (Æ/Ø/Å…) and non-Latin scripts (CJK, Cyrillic, …)
  that previously fell into the # catch-all. Adds artistBucketKey/compareBuckets
  helpers (unit-tested), an OTHER bucket sorted last, and the artists.other
  label across 9 locales.

* docs(changelog): queue link hover, genre card artist split, Artists Other bucket (#977)

src/utils/componentHelpers/artistsHelpers.test.ts

@@ -0,0 +1,48 @@
+import { describe, expect, it } from 'vitest';
+import { artistBucketKey, compareBuckets, OTHER_BUCKET, ALPHABET } from './artistsHelpers';
+
+describe('artistBucketKey', () => {
+  it('buckets A–Z names by their uppercased first letter', () => {
+    expect(artistBucketKey('Adele')).toBe('A');
+    expect(artistBucketKey('zz top')).toBe('Z');
+    expect(artistBucketKey('mGla')).toBe('M');
+  });
+
+  it('puts digit-leading names in #', () => {
+    expect(artistBucketKey('2Pac')).toBe('#');
+    expect(artistBucketKey('50 Cent')).toBe('#');
+    expect(artistBucketKey('999')).toBe('#');
+  });
+
+  it('puts accented Latin and non-Latin scripts in Other (not #)', () => {
+    expect(artistBucketKey('Ärzte')).toBe(OTHER_BUCKET);
+    expect(artistBucketKey('Øde')).toBe(OTHER_BUCKET);
+    expect(artistBucketKey('Å-band')).toBe(OTHER_BUCKET);
+    expect(artistBucketKey('이영지')).toBe(OTHER_BUCKET);   // Korean
+    expect(artistBucketKey('くるり')).toBe(OTHER_BUCKET);   // Japanese
+    expect(artistBucketKey('Кино')).toBe(OTHER_BUCKET);    // Cyrillic
+    expect(artistBucketKey('王菲')).toBe(OTHER_BUCKET);     // Chinese
+  });
+
+  it('puts symbol-leading and empty names in Other', () => {
+    expect(artistBucketKey('!!!')).toBe(OTHER_BUCKET);
+    expect(artistBucketKey('   ')).toBe(OTHER_BUCKET);
+    expect(artistBucketKey('')).toBe(OTHER_BUCKET);
+  });
+
+  it('ignores leading whitespace', () => {
+    expect(artistBucketKey('  Beatles')).toBe('B');
+  });
+});
+
+describe('compareBuckets', () => {
+  it('orders # first, then A–Z, then Other last', () => {
+    const shuffled = ['OTHER', 'M', '#', 'A', 'Z'];
+    expect([...shuffled].sort(compareBuckets)).toEqual(['#', 'A', 'M', 'Z', 'OTHER']);
+  });
+
+  it('ALPHABET ends with the Other bucket', () => {
+    expect(ALPHABET[ALPHABET.length - 1]).toBe(OTHER_BUCKET);
+    expect(ALPHABET).toContain('#');
+  });
+});