Implement complete frontend with admin panel and theme system

- Add admin authentication and dashboard
- Create event management pages (list, create, edit, archive)
- Implement gallery enhancements (search, sorting, bulk download)
- Add email configuration and archive management pages
- Integrate Umami analytics with tracking throughout the app
- Add comprehensive error boundaries and loading states
- Implement accessibility features (WCAG 2.1 AA compliance)
- Create theme system with preset themes and customization
- Add branding settings and company information management
- Fix backend database initialization and health check
- Configure proper API URLs and environment variables

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/src/pages/admin/index.ts

@@ -0,0 +1,9 @@
+export { AdminLoginPage } from './AdminLoginPage';
+export { AdminDashboard } from './AdminDashboard';
+export { EventsListPage } from './EventsListPage';
+export { CreateEventPage } from './CreateEventPage';
+export { EventDetailsPage } from './EventDetailsPage';
+export { EmailConfigPage } from './EmailConfigPage';
+export { ArchivesPage } from './ArchivesPage';
+export { AnalyticsPage } from './AnalyticsPage';
+export { BrandingPage } from './BrandingPage';