Implement initial EVE-themed analytics frontend:
- Added design system and dark theme CSS variables
- Created core TypeScript types for API shapes
- Implemented API hooks (fetch statistics, search, item names, groups)
- Built icon component for Eve images
- Implemented SearchBar, FilterBar, Dashboard, StatisticsPanel components
- Added item group caching hook
- Wired up index page to render the dashboard
Prepares for interactive drill-down analytics with URL-based filters and collapsible panels.
X-Lovable-Edit-ID: edt-b4a6a490-243d-43ae-9d94-2f8021a68ad3
