Fix multiple production issues and add password change functionality

- Fixed frontend API URL configuration to use correct port 3002
- Fixed create event functionality by adding proper endpoint and fixing JSON parsing
- Fixed email settings save functionality by importing logActivity correctly
- Fixed admin settings save functionality by using api client instead of direct fetch
- Implemented password change functionality with modal and backend endpoint
- Added updated_at column to admin_users table
- Fixed all mock data issues - now using real backend data throughout

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

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

frontend/src/pages/admin/EventDetailsPage.tsx

@@ -78,8 +78,7 @@ export const EventDetailsPage: React.FC = () => {
   // Extend expiration mutation
   const extendMutation = useMutation({
     mutationFn: (days: number) => {
-      const newDate = addDays(parseISO(event!.expires_at), days);
-      return eventsService.extendExpiration(parseInt(id!), newDate.toISOString());
+      return eventsService.extendExpiration(parseInt(id!), days);
     },
     onSuccess: () => {
       queryClient.invalidateQueries({ queryKey: ['admin-event', id] });