- Implement task grouping logic by columns in ListView component
- Add CSS styling for section headers and grouped layout
- Fix React Fragment keys for proper list rendering
- Update tests for grouped list view functionality
- Add changeset for release notes
- Create ListView component with sorting, filtering, and drag-and-drop support
- Add view toggle buttons to Header for switching between board and list views
- Integrate view switching in App with localStorage persistence
- Add comprehensive tests for ListView, Header view toggle, and App integration
- Add CSS styles for list view layout and toggle button states