fix: resolve date formatting error in event creation

- Fix TypeError "e.match is not a function" when creating events
- Update useLocalizedDate hook to handle both string and object date formats
- Add type safety for date format configuration
- Fix date format strings to use correct date-fns format (lowercase)
- Ensure backward compatibility with existing date settings

The issue was caused by SettingsPage saving date formats as objects
while useLocalizedDate expected strings. This fix handles both formats
gracefully and prevents the error page redirect.

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

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

frontend/src/hooks/useLocalizedDate.ts

@@ -22,7 +22,14 @@ export const useLocalizedDate = () => {
   const format = (date: Date | string, formatStr?: string) => {
     const dateObj = typeof date === 'string' ? new Date(date) : date;
     // Use admin-configured date format if available and no format string provided
-    const dateFormat = formatStr || settings?.general_date_format || 'PPP';
+    let dateFormat = formatStr;
+    if (!dateFormat && settings?.general_date_format) {
+      // Handle both string and object formats
+      dateFormat = typeof settings.general_date_format === 'string' 
+        ? settings.general_date_format 
+        : settings.general_date_format.format || 'PPP';
+    }
+    dateFormat = dateFormat || 'PPP';
     return dateFnsFormat(dateObj, dateFormat, { locale: getLocale() });
   };
   
@@ -35,6 +42,10 @@ export const useLocalizedDate = () => {
     format,
     formatDistanceToNow,
     locale: getLocale(),
-    dateFormat: settings?.general_date_format || 'PPP'
+    dateFormat: settings?.general_date_format 
+      ? (typeof settings.general_date_format === 'string' 
+          ? settings.general_date_format 
+          : settings.general_date_format.format || 'PPP')
+      : 'PPP'
   };
 };

frontend/src/pages/admin/CreateEventPageEnhanced.tsx

@@ -84,7 +84,7 @@ export const CreateEventPageEnhanced: React.FC = () => {
   const [formData, setFormData] = useState<FormData>({
     event_type: 'wedding',
     event_name: '',
-    event_date: format(new Date(), 'yyyy-MM-dd'),
+    event_date: new Date().toISOString().split('T')[0], // Initialize with ISO date format
     host_name: '',
     host_email: '',
     admin_email: '',

frontend/src/pages/admin/SettingsPage.tsx

@@ -57,7 +57,7 @@ export const SettingsPage: React.FC = () => {
     enable_registration: false,
     maintenance_mode: false,
     default_language: 'en',
-    date_format: { format: 'DD/MM/YYYY', locale: 'en-GB' }
+    date_format: { format: 'dd/MM/yyyy', locale: 'en-GB' }
   });
 
   // Security settings state
@@ -99,7 +99,11 @@ export const SettingsPage: React.FC = () => {
         enable_registration: settings.general_enable_registration || false,
         maintenance_mode: settings.general_maintenance_mode || false,
         default_language: settings.general_default_language || 'en',
-        date_format: settings.general_date_format || { format: 'DD/MM/YYYY', locale: 'en-GB' }
+        date_format: settings.general_date_format 
+          ? (typeof settings.general_date_format === 'string'
+              ? { format: settings.general_date_format, locale: settings.general_date_format.includes('MM/dd') ? 'en-US' : 'en-GB' }
+              : settings.general_date_format)
+          : { format: 'dd/MM/yyyy', locale: 'en-GB' }
       });
 
       // Extract security settings
@@ -130,7 +134,12 @@ export const SettingsPage: React.FC = () => {
       // Convert to the format expected by the API
       const settingsData: Record<string, any> = {};
       Object.entries(generalSettings).forEach(([key, value]) => {
-        settingsData[`general_${key}`] = value;
+        // Special handling for date_format - only send the format string
+        if (key === 'date_format' && typeof value === 'object' && value.format) {
+          settingsData[`general_${key}`] = value.format;
+        } else {
+          settingsData[`general_${key}`] = value;
+        }
       });
       return settingsService.updateSettings(settingsData);
     },
@@ -395,10 +404,10 @@ export const SettingsPage: React.FC = () => {
                   {t('settings.general.dateFormat')}
                 </label>
                 <select
-                  value={generalSettings.date_format?.format || 'DD/MM/YYYY'}
+                  value={generalSettings.date_format?.format || 'dd/MM/yyyy'}
                   onChange={(e) => {
                     const format = e.target.value;
-                    const locale = format === 'MM/DD/YYYY' ? 'en-US' : 'en-GB';
+                    const locale = format === 'MM/dd/yyyy' ? 'en-US' : 'en-GB';
                     setGeneralSettings(prev => ({ 
                       ...prev, 
                       date_format: { format, locale }
@@ -406,10 +415,10 @@ export const SettingsPage: React.FC = () => {
                   }}
                   className="w-full px-3 py-2 border border-neutral-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-primary-500 focus:border-primary-500"
                 >
-                  <option value="DD/MM/YYYY">DD/MM/YYYY (European)</option>
-                  <option value="MM/DD/YYYY">MM/DD/YYYY (US)</option>
-                  <option value="YYYY-MM-DD">YYYY-MM-DD (ISO)</option>
-                  <option value="DD.MM.YYYY">DD.MM.YYYY (German)</option>
+                  <option value="dd/MM/yyyy">DD/MM/YYYY (European)</option>
+                  <option value="MM/dd/yyyy">MM/DD/YYYY (US)</option>
+                  <option value="yyyy-MM-dd">YYYY-MM-DD (ISO)</option>
+                  <option value="dd.MM.yyyy">DD.MM.YYYY (German)</option>
                 </select>
                 <p className="text-xs text-neutral-500 mt-1">
                   {t('settings.general.dateFormatHelp')}

frontend/src/services/publicSettings.service.ts

@@ -15,7 +15,7 @@ export interface PublicSettings {
   theme_config: any;
   default_language: string;
   enable_analytics: boolean;
-  general_date_format: string;
+  general_date_format: string | { format: string; locale: string };
   enable_recaptcha: boolean;
   recaptcha_site_key: string | null;
   maintenance_mode: boolean;