frontend with ony errors

frontend/src/utils/foramatters.ts

@@ -0,0 +1,36 @@
+// frontend/src/shared/utils.ts
+// import { ScheduledShift } from '../../../backend/src/models/shiftPlan.js';
+
+// Shared date and time formatting utilities
+export const formatDate = (dateString: string | undefined): string => {
+  if (!dateString) return 'Kein Datum';
+  
+  const date = new Date(dateString);
+  if (isNaN(date.getTime())) return 'Ungültiges Datum';
+  
+  return date.toLocaleDateString('de-DE', {
+    day: '2-digit',
+    month: '2-digit',
+    year: 'numeric'
+  });
+};
+
+export const formatTime = (timeString: string): string => {
+  return timeString?.substring(0, 5) || '';
+};
+
+export const formatDateTime = (dateString: string): string => {
+  if (!dateString) return 'Kein Datum';
+  
+  const date = new Date(dateString);
+  if (isNaN(date.getTime())) return 'Ungültiges Datum';
+  
+  return date.toLocaleDateString('de-DE', {
+    weekday: 'long',
+    day: '2-digit',
+    month: '2-digit',
+    year: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit'
+  });
+};