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/types/index.ts

@@ -24,6 +24,8 @@ export interface Event {
     size_bytes: number;
     uploaded_at: string;
   }>;
+  allow_user_uploads?: boolean;
+  upload_category_id?: number | null;
 }
 
 export interface GalleryInfo {
@@ -65,6 +67,8 @@ export interface GalleryData {
     welcome_message?: string;
     color_theme?: string;
     expires_at: string;
+    allow_user_uploads?: boolean;
+    upload_category_id?: number | null;
   };
   categories?: PhotoCategory[];
   photos: Photo[];
@@ -99,6 +103,8 @@ export interface GalleryAuthResponse {
     welcome_message?: string;
     color_theme?: string;
     expires_at: string;
+    allow_user_uploads?: boolean;
+    upload_category_id?: number | null;
   };
 }