v2.8.0

v2.8.0 — Review markers on search hover auto-adds

Hover auto-adds are stamped for later review: notes "[hover-add]" on
every hover-queued entry, and a "temp" genre placeholder only when the
catalog lookup left genre blank (a real API genre is never
overwritten). Explicit clicks and app-page adds are unchanged. The
queue filter box now also matches notes, so "hover-add" lists every
marked entry.

Remaining backlog: search-page toast renderer gap, re-enrich for old
lightweight entries, keyboard shortcuts, PR-time CI, Firefox (v3.0.0).