Backend:
- MediaItem gains search_tags (custom + e621 tags, lowercase) and
has_custom_data, maintained on save with a data migration backfill
- File list search accepts search_type=filename|tags|both (tag search is
word-AND across the flattened tag text) and status=matched|custom|
unknown filters
- New /api/tags/cloud/ endpoint (cached 2 min per guest/auth, invalidated
on item changes and deletions) returning the most-used tags, honouring
guest visibility
Frontend:
- Library sidebar: Filename/Tags/Both selector, status pill toggles
(persisted), and a clickable tag cloud that runs a tag search
- Roadmap updated