fix: multi-artist handling fixes from code review

[JoePittsy]

Release details

Fixed

• Album links on the leaderboard now work for multi-artist albums. Clicking an album credited to multiple artists (e.g. "Sonny Stitt, Kenny Garrett") on a row without stored IDs previously did nothing — the search-based resolver compared the joined artist string against individual artist names and never matched. The hint is now split per artist before matching.
• Phantom artist rows can no longer appear in Top Artists. An event whose artist field contained only separators (e.g. ",") would previously be aggregated as a literal "," artist. These are now dropped server-side.
• Artist images load on YT Music browse rows. The lightweight artist-image fetch now passes the service defaults blob when the item carries one, so services that require it (YT Music) return the real artist photo instead of always falling back to album art.

Internal

• Extracted a shared splitArtists() helper into renderer/src/lib/itemHelpers.ts, replacing duplicated comma-splitting logic in LeaderboardPanel, AlbumPanel, and useResolveAndOpen.

Verification

• npm run typecheck clean (main + renderer), tsc --noEmit clean in server/
• npm run test:run: 442/442 tests passing across 35 files

🤖 Generated with Claude Code

[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	71.05%	1947 / 2740
🔵	Statements	67.92%	2238 / 3295
🔵	Functions	62.39%	614 / 984
🔵	Branches	61.89%	2082 / 3364

File Coverage

File	Stmts	Branches	Functions	Lines	Uncovered Lines
Changed Files
renderer/src/components/CardRow.tsx	71.42%	63.63%	71.42%	69.23%	17-32
renderer/src/components/LeaderboardPanel.tsx	85.52%	86.71%	81.81%	88.57%	16, 43, 66, 110-118, 206, 252, 276-277, 427-439, 462
renderer/src/components/album/AlbumPanel.tsx	84.04%	86.29%	80%	89.7%	50, 90-95, 106, 156, 213
renderer/src/hooks/useArtistBrowse.ts	59.09%	42.1%	63.63%	56.75%	54-71, 82, 111-133
renderer/src/hooks/useResolveAndOpen.ts	88.57%	69.44%	100%	96.42%	28, 30, 39, 60
renderer/src/lib/itemHelpers.ts	95.34%	81.25%	90.9%	98.23%	26, 185, 191, 193, 333, 337

Generated in workflow #141 for commit ee06835 by the Vitest Coverage Report Action