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]>

frontend/src/pages/admin/EventDetailsPage.tsx

@@ -48,6 +48,8 @@ export const EventDetailsPage: React.FC = () => {
     welcome_message: '',
     color_theme: '',
     expires_at: '',
+    allow_user_uploads: false,
+    upload_category_id: null as number | null,
   });
   const [copiedLink, setCopiedLink] = useState(false);
   const [showPhotoUpload, setShowPhotoUpload] = useState(false);
@@ -151,6 +153,8 @@ export const EventDetailsPage: React.FC = () => {
       welcome_message: event.welcome_message || '',
       color_theme: event.color_theme || '',
       expires_at: format(parseISO(event.expires_at), 'yyyy-MM-dd'),
+      allow_user_uploads: event.allow_user_uploads || false,
+      upload_category_id: event.upload_category_id || null,
     });
     setIsEditing(true);
   };
@@ -160,6 +164,8 @@ export const EventDetailsPage: React.FC = () => {
       welcome_message: editForm.welcome_message || undefined,
       color_theme: editForm.color_theme || undefined,
       expires_at: editForm.expires_at,
+      allow_user_uploads: editForm.allow_user_uploads,
+      upload_category_id: editForm.upload_category_id,
     });
   };
 
@@ -368,6 +374,47 @@ export const EventDetailsPage: React.FC = () => {
                     min={format(new Date(), 'yyyy-MM-dd')}
                   />
                 </div>
+                
+                <div>
+                  <label className="flex items-center">
+                    <input
+                      type="checkbox"
+                      checked={editForm.allow_user_uploads}
+                      onChange={(e) => setEditForm(prev => ({ ...prev, allow_user_uploads: e.target.checked }))}
+                      className="w-4 h-4 text-primary-600 border-neutral-300 rounded focus:ring-primary-500"
+                    />
+                    <span className="ml-2 text-sm text-neutral-700">{t('events.allowUserUploads')}</span>
+                  </label>
+                  <p className="text-xs text-neutral-500 mt-1 ml-6">
+                    {t('events.allowUserUploadsHelp')}
+                  </p>
+                </div>
+                
+                {editForm.allow_user_uploads && (
+                  <div>
+                    <label className="block text-sm font-medium text-neutral-700 mb-1">
+                      {t('events.uploadCategory')}
+                    </label>
+                    <select
+                      value={editForm.upload_category_id || ''}
+                      onChange={(e) => setEditForm(prev => ({ 
+                        ...prev, 
+                        upload_category_id: e.target.value ? parseInt(e.target.value) : null 
+                      }))}
+                      className="w-full px-3 py-2 border border-neutral-300 rounded-lg focus:ring-2 focus:ring-primary-500 focus:border-primary-500"
+                    >
+                      <option value="">{t('events.selectCategory')}</option>
+                      {categories?.map(category => (
+                        <option key={category.id} value={category.id}>
+                          {category.name}
+                        </option>
+                      ))}
+                    </select>
+                    <p className="text-xs text-neutral-500 mt-1">
+                      {t('events.uploadCategoryHelp')}
+                    </p>
+                  </div>
+                )}
               </div>
             ) : (
               <dl className="space-y-4">
@@ -410,6 +457,28 @@ export const EventDetailsPage: React.FC = () => {
                     </dd>
                   </div>
                 </div>
+                
+                <div>
+                  <dt className="text-sm font-medium text-neutral-500">{t('events.userUploads')}</dt>
+                  <dd className="mt-1 text-sm text-neutral-900">
+                    {event.allow_user_uploads ? (
+                      <div className="space-y-1">
+                        <span className="inline-flex items-center px-2 py-1 text-xs font-medium text-green-700 bg-green-100 rounded">
+                          {t('common.yes')}
+                        </span>
+                        {event.upload_category_id && (
+                          <p className="text-xs text-neutral-600">
+                            {t('events.uploadCategory')}: {categories.find(c => c.id === event.upload_category_id)?.name || 'N/A'}
+                          </p>
+                        )}
+                      </div>
+                    ) : (
+                      <span className="inline-flex items-center px-2 py-1 text-xs font-medium text-neutral-700 bg-neutral-100 rounded">
+                        {t('common.no')}
+                      </span>
+                    )}
+                  </dd>
+                </div>
               </dl>
             )}
           </Card>