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>

frontend/src/hooks/index.ts

@@ -0,0 +1,3 @@
+export * from './useSessionTimeout';
+export * from './useOnClickOutside';
+export * from './useLocalizedDate';

frontend/src/hooks/useLocalizedDate.ts

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+import { useTranslation } from 'react-i18next';
+import { format as dateFnsFormat, formatDistanceToNow as dateFnsFormatDistanceToNow } from 'date-fns';
+import { de, enUS } from 'date-fns/locale';
+
+export const useLocalizedDate = () => {
+  const { i18n } = useTranslation();
+  
+  const getLocale = () => {
+    return i18n.language === 'de' ? de : enUS;
+  };
+  
+  const format = (date: Date | string, formatStr: string) => {
+    const dateObj = typeof date === 'string' ? new Date(date) : date;
+    return dateFnsFormat(dateObj, formatStr, { locale: getLocale() });
+  };
+  
+  const formatDistanceToNow = (date: Date | string, options?: { addSuffix?: boolean }) => {
+    const dateObj = typeof date === 'string' ? new Date(date) : date;
+    return dateFnsFormatDistanceToNow(dateObj, { ...options, locale: getLocale() });
+  };
+  
+  return {
+    format,
+    formatDistanceToNow,
+    locale: getLocale()
+  };
+};