Implemented responsive layout system with:
- Header: Top navigation with profile menu and mobile hamburger
- Sidebar: Desktop-only navigation sidebar (lg and above)
- Breadcrumbs: Auto-generated navigation breadcrumbs
- Layout: Main wrapper component with configurable options
Features:
- Responsive design (mobile, tablet, desktop)
- Active route highlighting
- User profile integration via auth store
- Click-outside dropdown closing
- Comprehensive test coverage (49 tests passing)
Updated (main) layout to use new Layout component system.
Updated dashboard page to work with new layout structure.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
