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/src/pages/admin/EventsListPage.tsx

@@ -15,6 +15,7 @@ import { format, parseISO, differenceInDays } from 'date-fns';
 import { toast } from 'react-toastify';
 
 import { Button, Input, Card, SkeletonTable, ErrorBoundary } from '../../components/common';
+import { BulkArchiveModal } from '../../components/admin';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
 import { eventsService } from '../../services/events.service';
 import type { Event } from '../../types';
@@ -28,6 +29,7 @@ export const EventsListPage: React.FC = () => {
   const [selectedEvents, setSelectedEvents] = useState<number[]>([]);
   // const [showFilters, setShowFilters] = useState(false);
   const [activeDropdown, setActiveDropdown] = useState<number | null>(null);
+  const [showBulkArchiveModal, setShowBulkArchiveModal] = useState(false);
 
   // Get filter from URL
   const statusFilter = searchParams.get('filter') as 'active' | 'archived' | null;
@@ -63,6 +65,25 @@ export const EventsListPage: React.FC = () => {
     },
   });
 
+  // Bulk archive mutation
+  const bulkArchiveMutation = useMutation({
+    mutationFn: eventsService.bulkArchiveEvents,
+    onSuccess: (data) => {
+      queryClient.invalidateQueries({ queryKey: ['admin-events'] });
+      setSelectedEvents([]);
+      setShowBulkArchiveModal(false);
+      
+      if (data.results.failed.length === 0) {
+        toast.success(`Successfully archived ${data.results.successful.length} events`);
+      } else {
+        toast.warning(`Archived ${data.results.successful.length} events, ${data.results.failed.length} failed`);
+      }
+    },
+    onError: () => {
+      toast.error('Failed to archive events');
+    },
+  });
+
   // Filter and search events
   const filteredEvents = useMemo(() => {
     if (!data?.events) return [];
@@ -237,10 +258,7 @@ export const EventsListPage: React.FC = () => {
               <Button 
                 variant="outline" 
                 size="sm"
-                onClick={() => {
-                  // Handle bulk archive
-                  toast.info('Bulk archive coming soon');
-                }}
+                onClick={() => setShowBulkArchiveModal(true)}
               >
                 Archive Selected
               </Button>
@@ -407,6 +425,15 @@ export const EventsListPage: React.FC = () => {
           </table>
         </div>
       </Card>
+      
+      {/* Bulk Archive Modal */}
+      <BulkArchiveModal
+        isOpen={showBulkArchiveModal}
+        onClose={() => setShowBulkArchiveModal(false)}
+        onConfirm={() => bulkArchiveMutation.mutate(selectedEvents)}
+        selectedEvents={filteredEvents.filter(e => selectedEvents.includes(e.id))}
+        isLoading={bulkArchiveMutation.isPending}
+      />
       </div>
     </ErrorBoundary>
   );