fix(payment): adjust date formatting to use UTC offset for consistency

app/payment/[uuid]/page.js

@@ -99,6 +99,7 @@ export default function PaymentDetailsPage() {
     const formatDate = (timestamp) => {
         const date = new Date(parseInt(timestamp) * 1000);
         return new Intl.DateTimeFormat("fa-IR", {
+            timeZone: "Asia/Tehran",
             year: "numeric",
             month: "long",
             day: "numeric",

components/appointment/information/Detail.js

@@ -16,7 +16,7 @@ function Detail({ doctor, step, setStep, selectedSlot, selectedDate }) {
 
   // فرمت کردن تاریخ به شمسی
   const formattedDate = selectedDate
-    ? moment.unix(selectedDate).locale('fa').format('jDD jMMMM jYYYY')
+    ? moment.unix(selectedDate).utcOffset(210).locale('fa').format('jDD jMMMM jYYYY')
     : "تاریخ انتخاب نشده";
 
   // فرمت کردن زمان

components/appointment/paying/index.js

@@ -92,9 +92,10 @@ function Paying({ setStep, appointmentId, expiresAt, doctor, data, isForAnother,
             <div className="flex justify-between items-center text-[14px] md:text-[15px]">
               <span className="text-[#9B9B9B]">زمان نوبت</span>
               <span className="text-[#3B3B3B] font-medium" dir="rtl">
-                {moment.unix(selectedSlot.start).locale("fa").format("dddd jD jMMMM jYYYY")}
+                {/* utcOffset(210) = ساعت رسمی ایران (+03:30)، مستقل از tz مرورگر بیمار */}
+                {moment.unix(selectedSlot.start).utcOffset(210).locale("fa").format("dddd jD jMMMM jYYYY")}
                 {" — ساعت "}
-                {moment.unix(selectedSlot.start).format("HH:mm")}
+                {moment.unix(selectedSlot.start).utcOffset(210).format("HH:mm")}
               </span>
             </div>
           )}