Self-review of the branch diff (feature/plex-filter-bar-overhaul) against main:
- Surprise rail query key omitted `lang` while the backend /surprise now filters
against the language-specific genre column → a HU/EN switch under an active genre
filter left the rail stale. Key it by scope+lang+filters, matching plexDiscover.
- Chip-removing a collection left its entry in `collectionTitles` (hashed into the
plex query keys), splitting the cache from the pristine no-collection state and
growing the titles map unboundedly. Prune the title on remove, like CollectionPicker.
- The saved-views default-mirror effect gained `cfg` in its deps (re-memoized on every
live filter edit) → a synchronous localStorage write per keystroke. Depend on the
module-stable mirror fn instead.
- Collections-browse search input had no accessible name (placeholder only). Add
aria-label + type="search".
- Extract the tile hue-hash + gradient duplicated between PlexDiscover and
plexBrowseLists into a shared lib/hueTile so the two surfaces can't drift.
- Document migration 0073 downgrade() as lossy and de-dup non-feed rows before
recreating the narrow (user_id, name) constraint (verified by the drift test).
- Add unit tests for coercePlexFilters (legacy single-collection migration) and
plexFiltersSignature (order-independence, title-ignoring).
Gate: tsc/lint/knip/prettier clean, 410 vitest; backend ruff + migration drift +
saved-views tests green.