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 <noreply@anthropic.com>

backend/src/routes/adminEvents.js

@@ -19,7 +19,9 @@ router.post('/', adminAuth, [
   body('password').isLength({ min: 6 }),
   body('expiration_days').isInt({ min: 1, max: 365 }).optional(),
   body('welcome_message').optional().trim(),
-  body('color_theme').optional().trim()
+  body('color_theme').optional().trim(),
+  body('allow_user_uploads').optional().isBoolean(),
+  body('upload_category_id').optional().isInt()
 ], async (req, res) => {
   try {
     const errors = validationResult(req);
@@ -36,7 +38,9 @@ router.post('/', adminAuth, [
       password,
       welcome_message = '',
       color_theme = null,
-      expiration_days = 30
+      expiration_days = 30,
+      allow_user_uploads = false,
+      upload_category_id = null
     } = req.body;
     
     // Generate unique slug
@@ -79,7 +83,9 @@ router.post('/', adminAuth, [
       color_theme,
       share_link: shareLink,
       expires_at: expires_at.toISOString(),
-      created_at: new Date().toISOString()
+      created_at: new Date().toISOString(),
+      allow_user_uploads,
+      upload_category_id
     });
     
     // Log activity
@@ -256,7 +262,9 @@ router.put('/:id', adminAuth, [
   body('is_active').optional().isBoolean(),
   body('expires_at').optional().isISO8601(),
   body('welcome_message').optional().trim(),
-  body('color_theme').optional().trim()
+  body('color_theme').optional().trim(),
+  body('allow_user_uploads').optional().isBoolean(),
+  body('upload_category_id').optional().isInt()
 ], async (req, res) => {
   try {
     const errors = validationResult(req);