fix: resolve multiple feedback management issues

- Hide "Manage Feedback" button when feedback is disabled for an event
- Fix 500 error on feedback API endpoint by adding null-safe operators
- Fix TypeError on analytics page by calculating average_rating in backend
- Fix password validation for event creation by properly awaiting async validation
- Add proper null checks and fallbacks for feedback statistics

These fixes ensure:
- Date passwords like "19.07.2025" work with simple password complexity settings
- Feedback management page loads without errors
- Analytics display correctly even with no feedback data

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

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

backend/src/routes/adminEvents-enhanced.js

@@ -42,7 +42,7 @@ router.post('/', adminAuth, [
     } = req.body;
     
     // Validate password strength for gallery
-    const passwordValidation = validatePasswordInContext(password, 'gallery', {
+    const passwordValidation = await validatePasswordInContext(password, 'gallery', {
       eventName: event_name
     });
     

backend/src/routes/adminEvents.js

@@ -53,7 +53,7 @@ router.post('/', adminAuth, [
     } = req.body;
     
     // Validate password strength
-    const passwordValidation = validatePasswordInContext(password, 'gallery', {
+    const passwordValidation = await validatePasswordInContext(password, 'gallery', {
       eventName: event_name
     });
     

backend/src/routes/adminFeedback.js

@@ -123,8 +123,8 @@ router.get('/events/:eventId/feedback',
         pagination: {
           page: parseInt(page),
           limit: parseInt(limit),
-          total: totalCount.count || 0,
-          pages: Math.ceil((totalCount.count || 0) / limit)
+          total: totalCount?.count || 0,
+          pages: Math.ceil((totalCount?.count || 0) / limit)
         }
       });
     } catch (error) {
@@ -182,7 +182,35 @@ router.get('/events/:eventId/feedback-analytics',
       const { eventId } = req.params;
       
       // Get summary statistics
-      const summary = await feedbackService.getEventFeedbackSummary(eventId);
+      const summaryData = await feedbackService.getEventFeedbackSummary(eventId);
+      
+      // Calculate average rating and other summary stats
+      const avgRatingResult = await db('photo_feedback')
+        .where('event_id', eventId)
+        .where('feedback_type', 'rating')
+        .avg('rating as average_rating')
+        .first();
+      
+      const pendingModeration = await db('photo_feedback')
+        .where('event_id', eventId)
+        .where('feedback_type', 'comment')
+        .where('is_approved', false)
+        .where('is_hidden', false)
+        .count('* as count')
+        .first();
+      
+      const summary = {
+        average_rating: parseFloat(avgRatingResult?.average_rating || 0),
+        total_ratings: summaryData.stats?.total_ratings || 0,
+        total_likes: summaryData.stats?.total_likes || 0,
+        total_comments: summaryData.stats?.total_comments || 0,
+        total_favorites: summaryData.stats?.total_favorites || 0,
+        pending_moderation: pendingModeration?.count || 0,
+        total_feedback: (summaryData.stats?.total_ratings || 0) + 
+                       (summaryData.stats?.total_likes || 0) + 
+                       (summaryData.stats?.total_comments || 0) + 
+                       (summaryData.stats?.total_favorites || 0)
+      };
       
       // Get top-rated photos
       const topRated = await db('photos')