* Extended functionalities

* Added different UIs

meal-plan-frontend/src/utils/date.util.ts

@@ -0,0 +1,29 @@
+export function todayIso(): string {
+  return new Date().toISOString().slice(0, 10);
+}
+
+export function addDaysIso(iso: string, days: number): string {
+  const d = new Date(`${iso}T12:00:00`);
+  d.setDate(d.getDate() + days);
+  return d.toISOString().slice(0, 10);
+}
+
+export function startOfWeekIso(iso: string): string {
+  const d = new Date(`${iso}T12:00:00`);
+  const day = d.getDay();
+  const diff = day === 0 ? -6 : 1 - day;
+  d.setDate(d.getDate() + diff);
+  return d.toISOString().slice(0, 10);
+}
+
+export function endOfWeekIso(iso: string): string {
+  return addDaysIso(startOfWeekIso(iso), 6);
+}
+
+export function formatDisplayDate(iso: string, locale: string): string {
+  return new Date(`${iso}T12:00:00`).toLocaleDateString(locale, {
+    weekday: "short",
+    month: "short",
+    day: "numeric",
+  });
+}