Coauthored books should appear under each author #64

What

The list endpoint only gives authorName as one string like A, B. Today a coauthored book forms its own combination group in Author view instead of showing under each author.

Bite

Author view fractures. A prolific author's books are split across several groups, and the effect grows with library size.

Proposed shape

• Split using the expanded authors array (needs the detail endpoint) or an author table filled during sync.
• Decide which source is cheaper before building, since the list endpoint is always minified.

Why not in the big-library build

The fix needs data the list endpoint does not send, so it belongs with a sync or schema change.

🤖 Generated with Claude Code