Phase 7b: Migrate deprecated RPCs to Customer* RPCs

- Profile/Index: InitiateBasePackagePayment → CustomerPurchasePackage
  - Fetches base package via GetCustomerPackages, passes PackageId + PurchaseMethod
- Profile/PaymentCallback: VerifyBasePackagePayment → CustomerVerifyPackagePurchase
  - Uses Authority/Status (from ZarinPal callback) + orderId (from embedded URL param)
  - TransactionId no longer required (CMS finds it internally)

src/FrontOffice.Main/Pages/Profile/PaymentCallback.razor

@@ -101,7 +101,7 @@
     {
         try
         {
-            if (OrderId <= 0 || TransactionId <= 0 || string.IsNullOrEmpty(Authority))
+            if (OrderId <= 0 || string.IsNullOrEmpty(Authority))
             {
                 _isSuccess = false;
                 _message = "پارامترهای پرداخت نامعتبر است";
@@ -110,20 +110,23 @@
                 return;
             }
 
-            var response = await PackageContractClient.VerifyBasePackagePaymentAsync(new VerifyBasePackagePaymentRequest
+            var response = await PackageContractClient.CustomerVerifyPackagePurchaseAsync(new CustomerVerifyPackagePurchaseRequest
             {
                 OrderId = OrderId,
-                TransactionId = TransactionId,
-                PaymentSuccess = Status == "OK",
-                RefId = !string.IsNullOrEmpty(Authority) ? Authority : null,
-                Message = !string.IsNullOrEmpty(Status) ? Status : null
+                Authority = Authority ?? string.Empty,
+                Status = Status ?? string.Empty
             });
 
             _isSuccess = response.Success;
             _message = response.Message;
             _refId = response.ReferenceCode ?? "";
-            _walletBalance = response.WalletBalance;
-            _discountBalance = response.DiscountBalance;
+            
+            // Wallet balances are no longer in verify response — show from purchase info
+            if (response.PurchaseInfo != null)
+            {
+                _walletBalance = response.PurchaseInfo.AmountPaid;
+                _discountBalance = 0; // Available in wallet page
+            }
             
             // اگر پرداخت موفق بود، توکن را refresh می‌کنیم
             // چون PackagePurchaseMethod تغییر کرده و باید در claims جدید باشد