feat(ui): polish, animations & performance optimizations
Sprint 4.1 — Exit animations with framer-motion AnimatePresence:
- modal.tsx: overlay fade + panel scale/fade entry/exit
- dropdown.tsx: slide/fade entry/exit
Sprint 4.2 — Missing hover transitions on PostCard:
- Added transition-colors to author name + tags hover states
Sprint 4.3 — Button loading prop:
- Added loading?: boolean with Loader2 spinner + auto-disable
Sprint 4.4 — OptimizedImage replacement:
- PostCard, ProductCard, CourseCard, PlaylistDetailView content images
Sprint 4.5 — React.memo on list components:
- ProductCard, PlaylistCard, TrackCard, CourseCard, PostCard
Sprint 4.6 — Consolidate duplicates:
- Deleted KodoEmptyState (redundant with EmptyState)
- Documented Spinner vs LoadingSpinner distinction (complementary)
- Confirmed Dialog delegates to Modal (correct architecture)
Co-authored-by: Cursor <cursoragent@cursor.com>
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