- PinOverlay: zero-allocation rendering with in-place Graphics/Text updates,
fix WebGL texture crash (addressModeU null) from orphaned Text objects
- Pins always visible on media, track during drag via updatePositions() fast path
- Replace eraser with Review mode in toolbar tool group (orange gradient)
- Add tool instruction hints bar below toolbar (context-sensitive per tool)
- Feedback panel: glassmorphism, improved ThreadDetail/CommentItem/ThreadListItem
- Timestamps: relative with "ago" suffix, full date on hover tooltip
- De-emphasize pin numbers, show status text in thread list
- Animated arrangement transitions (easeOutCubic, 320ms) for pack/grid/row/column
- Disable snap guides (user requested)
- Paste now selects newly created items
- Remove eraser keyboard shortcuts, remap tool shortcuts
- Orphaned thread cleanup: safe destroy check for deleted media pins
1. toggleVote wrapped in transaction (race condition fix)
2. FeedbackPanel fetch calls now surface errors via onError/toast
3. Extracted resolveBoard/hasCollectionRole to shared board-access.js
4. AnnotationStore uses monotonic version counter for snapshots
5. PinOverlay uses object pool instead of destroy/recreate on refresh
6. canvasObjects prop memoized with useMemo
7. PinOverlay store subscription cleaned up on unmount
8. Comment content capped at 5000 chars (backend validation)
10. anchor_type validated to 'object' or 'point'