Fix brand theme application and add comprehensive translations

- Fixed theme not being reflected on gallery and admin login pages
- Created GlobalThemeProvider to apply themes globally
- Updated gallery and admin login pages to use dynamic CSS variables
- Added complete translations for all admin sections in English and German:
  - Notifications management
  - Event view and creation
  - Photo upload functionality
  - Category management
  - Archive page view
  - Analytics dashboard
  - Branding and theme settings
  - System settings
  - CMS page management
  - Email configuration
- Fixed admin photo management display issues
- Fixed photo upload category assignment
- Added password reset functionality for galleries
- Improved error handling and user feedback

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

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

docker-compose.yml

@@ -34,15 +34,14 @@ services:
     build:
       context: ./frontend
       dockerfile: Dockerfile
-      target: builder
     ports:
-      - "3005:5173"
+      - "3005:80"
     environment:
       - REACT_APP_API_URL=http://localhost:3001
     volumes:
-      - ./frontend:/app
-      - /app/node_modules
-    command: npm run dev
+      - ./frontend/nginx.conf:/etc/nginx/conf.d/default.conf:ro
+    depends_on:
+      - backend
 
   mailhog:
     image: mailhog/mailhog:latest