improvement: rtl direction, solar calendar and persian formatting added for persian users.

frontend/src/components/staff/workingHours.ts

@@ -1,3 +1,5 @@
+import { formatAppMinuteOfDay } from '@/lib/i18n/format';
+
 export const MINUTES_PER_DAY = 24 * 60;
 export const SCHEDULE_SLOT_MINUTES = 15;
 
@@ -50,9 +52,8 @@ export function timeInputToMinutes(value: string): number | null {
   return h * 60 + m;
 }
 
-export function formatMinuteLabel(minute: number): string {
-  const d = new Date(2000, 0, 1, Math.floor(minute / 60), minute % 60, 0, 0);
-  return d.toLocaleTimeString(undefined, { hour: 'numeric', minute: '2-digit', hour12: true });
+export function formatMinuteLabel(minute: number, locale: string): string {
+  return formatAppMinuteOfDay(minute, locale);
 }
 
 export function emptyWorkingHoursEditorDays(): WorkingHoursEditorDay[] {