New /library: GET /api/library lists LibraryItems enriched with rgMbid + year
from the matching MonitoredRelease. Client renders a cover-art grid with a live
filter; clicking an album opens the AlbumModal (tracklist). Added Library to the
nav. The album-only overview to see everything downloaded.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Root layout now wraps every page in the editorial column with a masthead
(wordmark + tagline + live worker dot) and a contents-bar nav with active
state via usePathname. Theme toggle stamps data-theme on <html> and persists
to localStorage. Pages no longer repeat the ad-hoc nav line.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Jonathan