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frontend/src/utils/date.ts

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+import { format, parseISO } from "date-fns";
+import { de } from "date-fns/locale";
+
+export function formatDate(date: string | null | undefined, pattern = "dd.MM.yyyy"): string {
+  if (!date) return "–";
+  try {
+    return format(parseISO(date), pattern, { locale: de });
+  } catch {
+    return date;
+  }
+}
+
+export function formatDeadlineDate(date: string | null | undefined): string {
+  return formatDate(date);
+}
+
+export function formatCurrency(amount: number | null | undefined, currency = "EUR"): string {
+  if (amount === null || amount === undefined) {
+    return "–";
+  }
+  return new Intl.NumberFormat("de-DE", { style: "currency", currency }).format(amount);
+}