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/config/api.ts

@@ -7,7 +7,7 @@ export const GALLERY_TOKEN_KEY = 'gallery_token';
 
 // Create axios instance
 export const api = axios.create({
-  baseURL: '',
+  baseURL: import.meta.env.VITE_API_URL || 'http://localhost:3001',
   headers: {
     'Content-Type': 'application/json',
   },