- Add ResponsiveLayout component with dynamic row/column splitting based on terminal size
- Create terminal utility for detecting terminal dimensions and layout preferences
- Add truncate utility for smart text truncation with min/max bounds
- Implement comprehensive responsive layout tests with all breakpoints
- Update TUI exports to expose new layout and utility components
- Enhance README documentation with responsive layout guide and examples
- Create useGlobalShortcuts hook for centralized keyboard shortcut handling at app root
- Add FocusGuardRef module-level ref for tracking text input focus state
- Implement HelpOverlay component displaying available keyboard shortcuts
- Add Ctrl+C (emergency exit), q (quit), ?/h (help toggle), 1-5 (screen switch) shortcuts
- Focus guard prevents shortcuts when text input is focused (except Ctrl+C)
- Update ScreenRouter with controlled/uncontrolled mode support
- Wire global shortcuts into demo app with help overlay integration
- Add comprehensive tests for useGlobalShortcuts and HelpOverlay
- Update README with global shortcuts documentation and usage examples
- 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
