CRITICAL FIX: Toast notifications were blocking all UI interaction,
requiring a page refresh (F5) to click buttons again.
Root cause: The [data-sonner-toaster] container was capturing all
pointer events, preventing clicks on the page underneath.
Solution:
- Added CSS: pointer-events: none on [data-sonner-toaster]
- Added CSS: pointer-events: auto on [data-sonner-toast]
- This allows the toast itself to be interactive (buttons, close)
- But lets clicks pass through to the page underneath
After this fix, users can continue working immediately after
a toast appears without refreshing the page.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
## Bug Fixes
### Note Card Actions
- Fix broken size change functionality (missing state declaration)
- Implement React 19 useOptimistic for instant UI feedback
- Add startTransition for non-blocking updates
- Ensure smooth animations without page refresh
- All note actions now work: pin, archive, color, size, checklist
### Markdown LaTeX Rendering
- Add remark-math and rehype-katex plugins
- Support inline equations with dollar sign syntax
- Support block equations with double dollar sign syntax
- Import KaTeX CSS for proper styling
- Equations now render correctly instead of showing raw LaTeX
## Technical Details
- Replace undefined currentNote references with optimistic state
- Add optimistic updates before server actions for instant feedback
- Use router.refresh() in transitions for smart cache invalidation
- Install remark-math, rehype-katex, and katex packages
## Testing
- Build passes successfully with no TypeScript errors
- Dev server hot-reloads changes correctly
- Add debounced state updates for title and content (500ms delay)
- Immediate UI updates with delayed history saving
- Prevent one-letter-per-undo issue
- Add cleanup for debounce timers on unmount
