Success Criteria
- Add, complete, delete tasks
- Due date visual indicators
- localStorage persistence
- Drag tasks to reorder
- Keyboard shortcuts work
- Dark/light theme toggle
- Export tasks to JSON
- Import tasks from JSON
- Load sample data button
- App loads in less than 1 second
Constraints
No Backend
Purely client-side application
Demo-Friendly
Sample data and quick reset capability
Single Device
localStorage is browser-specific
Keep It Simple
Features serve demo purposes only