A manually-imported album had no release-group MBID, so it showed the ◉
placeholder until a Scan matched it. Now the import resolves the release group
(searchReleaseGroup, via the shared MB cache) and stores it on the new
LibraryItem.rgMbid column (migration add_library_rg_mbid). The library route
prefers LibraryItem.rgMbid, falling back to the MonitoredRelease join for
scanned items — so a manual album gets cover art immediately. Best-effort: a
no-match / MB outage just leaves rgMbid null.
web 164 tests, tsc + build clean.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Jonathan