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 <[email protected]>

frontend/src/pages/admin/CreateEventPage.tsx

@@ -32,7 +32,6 @@ const EVENT_TYPES = [
   { value: 'wedding', label: 'Wedding', emoji: '💒' },
   { value: 'birthday', label: 'Birthday', emoji: '🎂' },
   { value: 'corporate', label: 'Corporate', emoji: '🏢' },
-  { value: 'party', label: 'Party', emoji: '🎉' },
   { value: 'other', label: 'Other', emoji: '📸' },
 ];
 
@@ -126,8 +125,6 @@ export const CreateEventPage: React.FC = () => {
       return;
     }
 
-    const expiresAt = addDays(new Date(), formData.expires_in_days);
-    
     createMutation.mutate({
       event_type: formData.event_type,
       event_name: formData.event_name,
@@ -135,9 +132,9 @@ export const CreateEventPage: React.FC = () => {
       host_email: formData.host_email,
       admin_email: formData.admin_email,
       password: formData.password,
-      welcome_message: formData.welcome_message || undefined,
+      welcome_message: formData.welcome_message || '',
       color_theme: formData.color_theme || undefined,
-      expires_at: expiresAt.toISOString(),
+      expiration_days: formData.expires_in_days,
     });
   };