- Restructure Header.tsx to render Scripts as a submenu of Terminal in compact/tablet overflow menus
- Add submenu toggle state, keyboard navigation, and click-outside-to-close behavior
- Add CSS for nested submenu styling with slide-in animation and depth indicators
- Update Header tests to verify Scripts nested under Terminal with toggle interaction
- Update mobile-header-controls and tablet-header-controls tests for new menu hierarchy
- Update README documentation to reflect the Terminal > Scripts submenu structure
- Add tablet compact-header breakpoint (769px–1024px) with condensed layout
- Implement responsive Header component with mobile/tablet/desktop modes
- Add tablet-header-controls test suite (373 lines) for compact mode behavior
- Update existing Header and mobile-header-controls tests for new responsive tiers
- Refactor server routes and styles.css for three-tier responsive support
- Document responsive header architecture in README
- Add mobile-only header with collapsible search and overflow menu interactions
- Implement responsive layout locks in CSS for all screen sizes
- Update Header component with touch-friendly interaction states
- Add comprehensive unit and integration tests for mobile controls
- Document mobile header behavior and responsive design in README
