Frontend cleanup pass driven by the post-shadcn review.
Performance
- Memoize PhotoThumbnail and route cell click/double-click through
stable handlers so heap-membership invalidation no longer re-renders
every visible thumbnail.
- Cap usePhotosQuery's eager background page-walk at 20 pages with a
50ms inter-page yield — was unbounded (up to 100k photos cold).
- Drop the per-thumbnail loading spinner in favour of the existing
pulse skeleton; only retry state still surfaces a spinner.
UX
- Coalesce rapid X/U presses into a single undo entry + one toast
(1.2s window) so accidental bursts are easy to back out.
- Optimistic rating/color updates with per-id snapshot rollback on
error, matching the existing discard pattern.
- Section-aware empty timeline state with a Clear-all-filters CTA.
- Carry the search-match chip from the grid into the preview header.
- Add a basket-icon badge for active heap membership so the green
tint isn't the only signal (colorblind-safe).
- Standardise error toasts via formatApiError(): FastAPI detail,
validation arrays, axios message, with a 'Network Error' filter.
Architecture
- Extract useBulkPhotoMutations and stop duplicating
bulkRating/bulkColor across RightSidebar and useKeyboardShortcuts.
- Split RightSidebar (714 -> 448 LOC) and PhotoInfoPanel (952 -> 716)
into co-located sub-components: BulkTakenAtEditor, BulkTagsEditor,
TagsEditor, TakenAtEditor.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
dtoro
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