sepehr 2de2958b7a feat: Replace alert() with professional toast notification system
- Remove buggy Undo/Redo that saved character-by-character
- Simplify state to plain useState like Google Keep
- Create toast component with success/error/warning/info types
- Toast notifications auto-dismiss after 3s with smooth animations
- Add ToastProvider in layout
- Remove all JavaScript alert() calls
- Production-ready notification system
2026-01-04 14:36:15 +01:00
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