- Redesign MissionManager component with improved interaction patterns and shell layout
- Refactor Board, Column, and QuickEntryBox components for consistency
- Add comprehensive CSS styles (742 lines) for mission manager and related components
- Add MissionManager test suite (324 lines) covering new interaction behavior
- Update Board, Column tests; remove obsolete ListView and QuickEntryBox tests
- Clean up unused code in App.tsx and ListView.tsx
- Update Missions section in README and dashboard README to reflect actual UI behavior