feat: Add comprehensive system enhancements

- Add version display above storage consumption in admin sidebar
- Fix storage consumption to stick to bottom of window using flexbox
- Add user upload settings to events (allow uploads, category selection)
- Enhance disk space tab to comprehensive system status view
- Add localized date formatting for German/English language support
- Remove quick actions from dashboard for cleaner interface
- Create user photo upload functionality for galleries
- Add database migration for user upload settings
- Update all TypeScript types and interfaces

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

Co-Authored-By: Claude <[email protected]>

backend/src/routes/gallery.js

@@ -304,4 +304,77 @@ router.get('/:slug/stats', verifyGalleryAccess, async (req, res) => {
   }
 });
 
+// User photo upload endpoint
+router.post('/:eventId/upload', verifyGalleryAccess, async (req, res) => {
+  try {
+    const eventId = parseInt(req.params.eventId);
+    
+    // Verify the event matches the token
+    if (req.event.id !== eventId) {
+      return res.status(403).json({ error: 'Access denied' });
+    }
+    
+    // Check if user uploads are allowed
+    if (!req.event.allow_user_uploads) {
+      return res.status(403).json({ error: 'User uploads are not allowed for this event' });
+    }
+    
+    // Import multer and photo processing
+    const multer = require('multer');
+    const upload = multer({ 
+      dest: '/tmp/uploads/',
+      limits: { 
+        fileSize: 50 * 1024 * 1024, // 50MB
+        files: 10 // Max 10 files at once
+      },
+      fileFilter: (req, file, cb) => {
+        const allowedTypes = ['image/jpeg', 'image/png', 'image/webp'];
+        if (allowedTypes.includes(file.mimetype)) {
+          cb(null, true);
+        } else {
+          cb(new Error('Invalid file type'));
+        }
+      }
+    }).array('photos', 10);
+    
+    // Handle upload
+    upload(req, res, async (err) => {
+      if (err) {
+        console.error('Upload error:', err);
+        return res.status(400).json({ error: err.message });
+      }
+      
+      if (!req.files || req.files.length === 0) {
+        return res.status(400).json({ error: 'No files uploaded' });
+      }
+      
+      const { processUploadedPhotos } = require('../services/photoProcessor');
+      const categoryId = req.body.category_id || req.event.upload_category_id || null;
+      
+      try {
+        // Process uploaded photos
+        const results = await processUploadedPhotos(req.files, eventId, 'user', categoryId);
+        
+        // Clean up temp files
+        const fs = require('fs').promises;
+        for (const file of req.files) {
+          await fs.unlink(file.path).catch(console.error);
+        }
+        
+        res.json({ 
+          message: 'Photos uploaded successfully',
+          count: results.length,
+          photos: results
+        });
+      } catch (processError) {
+        console.error('Photo processing error:', processError);
+        res.status(500).json({ error: 'Failed to process photos' });
+      }
+    });
+  } catch (error) {
+    console.error('Upload route error:', error);
+    res.status(500).json({ error: 'Failed to upload photos' });
+  }
+});
+
 module.exports = router;