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/services/auth.service.ts

@@ -3,11 +3,8 @@ import type { LoginResponse, GalleryAuthResponse } from '../types';
 
 export const authService = {
   // Admin authentication
-  async adminLogin(username: string, password: string): Promise<LoginResponse> {
-    const response = await api.post<LoginResponse>('/api/auth/admin/login', {
-      username,
-      password,
-    });
+  async adminLogin(credentials: { email: string; password: string }): Promise<LoginResponse> {
+    const response = await api.post<LoginResponse>('/api/auth/admin/login', credentials);
     
     setAuthToken(response.data.token, true);
     return response.data;