- Restructured layout to use flex with sidebar and main content
- Moved filters (search, genre, format, sort) to Sidebar component
- Sidebar positioned on left, collapsible, open by default
- Main content area now uses flex-1 for better space utilization
- Filters organized vertically with labels for better UX
- Task 7.4.1.2 complete
- Created reusable Sidebar component in ui/ (separate from navigation Sidebar)
- Supports left/right positioning and collapsible functionality
- Customizable width, title, and icon
- Mobile backdrop support
- Smooth animations and transitions
- Controlled and uncontrolled modes
- SidebarCard variant for Card-styled sidebars
- Task 7.4.1.1 complete
