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 <[email protected]>

frontend/Dockerfile

@@ -31,10 +31,8 @@ COPY nginx.conf /etc/nginx/conf.d/default.conf
 # Copy built application from builder stage
 COPY --from=builder /app/dist /usr/share/nginx/html
 
-# Create non-root user
-RUN addgroup -g 101 -S nginx && \
-    adduser -S -D -H -u 101 -h /var/cache/nginx -s /sbin/nologin -G nginx -g nginx nginx && \
-    chown -R nginx:nginx /usr/share/nginx/html && \
+# Set permissions (nginx user already exists in nginx:alpine)
+RUN chown -R nginx:nginx /usr/share/nginx/html && \
     chown -R nginx:nginx /var/cache/nginx && \
     chown -R nginx:nginx /var/log/nginx && \
     touch /var/run/nginx.pid && \