collaboration_favorite and collaboration_recent tables locked to their
owner (admin all-access), FavoritesService (star, unstar, list with label
refresh and Unavailable entries, reorder) and RecentsService (throttled
view recording, list, hidden daily trim). Home shows real counts.
UI API endpoints follow once QRun-IO/qqq#1128 is released.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>