complete new audit system

frontend/src/pages/contracts/ContractList.tsx

@@ -12,6 +12,7 @@ import Badge from '../../components/ui/Badge';
 import CopyButton from '../../components/ui/CopyButton';
 import { Plus, Search, Eye, Edit, Trash2, User, Users, ChevronDown, ChevronRight, Info, X, ShieldAlert } from 'lucide-react';
 import { gdprApi } from '../../services/api';
+import { formatDate } from '../../utils/dateFormat';
 import type { Contract, ContractType, ContractStatus } from '../../types';
 
 const typeLabels: Record<ContractType, string> = {
@@ -307,9 +308,9 @@ export default function ContractList() {
           )}
           {contract.startDate && (
             <p className={`text-sm text-gray-500 ${isPredecessor ? 'ml-6' : ''}`}>
-              Beginn: {new Date(contract.startDate).toLocaleDateString('de-DE')}
+              Beginn: {formatDate(contract.startDate)}
               {contract.endDate &&
-                ` | Ende: ${new Date(contract.endDate).toLocaleDateString('de-DE')}`}
+                ` | Ende: ${formatDate(contract.endDate)}`}
             </p>
           )}
         </div>
@@ -491,7 +492,7 @@ export default function ContractList() {
                         </td>
                         <td className="py-3 px-4">
                           {contract.startDate
-                            ? new Date(contract.startDate).toLocaleDateString('de-DE')
+                            ? formatDate(contract.startDate)
                             : '-'}
                         </td>
                         <td className="py-3 px-4 text-right">