- Add ScreenRouter component for multi-screen navigation in TUI
- Implement tab bar with icon labels and active state indicators
- Support keyboard navigation with arrow keys and Tab/Shift+Tab
- Add mouse click support for tab selection
- Export new screen router components from package index
- Add comprehensive unit tests for navigation behavior
- Update documentation with architecture and gap analysis
- Update TUI README with ScreenRouter usage examples
- Add docs index with structured navigation and links across the new documentation set
- Document onboarding and technical foundations with getting-started and architecture guides
- Add detailed CLI and settings references plus feature guides for dashboard, tasks, workflow steps, missions, multi-project, and agents
- Add a contributing guide and polish cross-references between docs pages for discoverability
- Include dashboard screenshots for key views to provide visual context in the guides