feat: implement gallery feedback system with version tracking for backups

Gallery Feedback Features:
- Add feedback system allowing ratings, likes, comments, and favorites on photos
- Implement admin controls for enabling/disabling feedback per event
- Add content moderation with word filters and spam detection
- Implement rate limiting to prevent abuse (10 requests/15min per type)
- Create comprehensive admin interface for feedback management
- Add analytics dashboard for feedback insights
- Export feedback data when archiving events

Frontend Components:
- PhotoRating: 5-star rating system with optimistic updates
- PhotoLikes: Like/unlike with animation
- PhotoComments: Threaded comments with moderation
- PhotoFavorites: Bookmark functionality
- FeedbackSettings: Admin configuration panel
- EventFeedbackPage: Complete management interface

Backend Implementation:
- Database migration 033: 4 new tables for feedback system
- RESTful API with proper authorization
- Guest identification via SHA256(IP+UserAgent)
- Automatic backup integration
- Email notification support

Backup Version Tracking:
- Migration 034: Add version columns to backup tables
- Track app version, Node.js version, and DB schema version
- Create restore_history table for tracking restore attempts
- Add version compatibility checking for safe restores
- Configurable version matching requirements

Security & Performance:
- Input validation and sanitization
- Rate limiting per feedback type
- Content moderation system
- Optimistic UI updates
- Efficient database queries with proper indexes

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

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

frontend/src/pages/admin/EventDetailsPage.tsx

@@ -16,7 +16,8 @@ import {
   Upload,
   Image,
   Key,
-  Mail
+  Mail,
+  MessageSquare
 } from 'lucide-react';
 import { parseISO, differenceInDays } from 'date-fns';
 import { toast } from 'react-toastify';
@@ -319,6 +320,14 @@ export const EventDetailsPage: React.FC = () => {
                     {t('common.edit')}
                   </Button>
                 )}
+                <Button
+                  variant="outline"
+                  size="sm"
+                  leftIcon={<MessageSquare className="w-4 h-4" />}
+                  onClick={() => navigate(`/admin/events/${id}/feedback`)}
+                >
+                  {t('feedback.manage', 'Manage Feedback')}
+                </Button>
               </>
             )}
             {event.share_link && (