feat: add referral code support to phone verification form

src/FrontOffice.Main/Shared/AuthDialog.razor

@@ -22,7 +22,9 @@
                          PhoneNumber="@_phoneNumber"
                          ResendRemaining="_resendRemaining"
                          OnChangePhone="ChangePhoneAsync"
-                         OnResendOtp="ResendOtpAsync" />
+                         OnResendOtp="ResendOtpAsync"
+                         ReferralCode="@_referralCode"
+                         ReferralCodeChanged="OnReferralCodeChanged" />
     </div>
 }
 else
@@ -51,7 +53,9 @@ else
                                  PhoneNumber="@_phoneNumber"
                                  ResendRemaining="_resendRemaining"
                                  OnChangePhone="ChangePhoneAsync"
-                                 OnResendOtp="ResendOtpAsync" />
+                                 OnResendOtp="ResendOtpAsync"
+                                 ReferralCode="@_referralCode"
+                                 ReferralCodeChanged="OnReferralCodeChanged" />
 
                 <MudStack Class="mt-4" Spacing="2">
                     @if (_currentStep == AuthStep.Phone)

src/FrontOffice.Main/Shared/AuthDialog.razor.cs

@@ -42,6 +42,9 @@ public partial class AuthDialog : IDisposable
     private string? _captchaCode;
     private string? _captchaInput;
 
+    // Referral code field
+    private string? _referralCode;
+
     [Inject] private ILocalStorageService LocalStorage { get; set; } = default!;
     [Inject] private UserContract.UserContractClient UserClient { get; set; } = default!;
 
@@ -66,9 +69,20 @@ public partial class AuthDialog : IDisposable
         {
             _phoneRequest.Mobile = storedPhone;
         }
+
+        _referralCode = await LocalStorage.GetItemAsync<string>("referral:code");
         // await LocalStorage.RemoveItemAsync(TokenStorageKey);
     }
 
+    private async Task OnReferralCodeChanged(string? value)
+    {
+        _referralCode = value;
+        if (!string.IsNullOrWhiteSpace(value))
+            await LocalStorage.SetItemAsync("referral:code", value);
+        else
+            await LocalStorage.RemoveItemAsync("referral:code");
+    }
+
     private void GenerateCaptcha()
     {
         _captchaCode = Guid.NewGuid().ToString("N")[..6].ToUpperInvariant();
@@ -182,9 +196,12 @@ public partial class AuthDialog : IDisposable
             _verifyRequest.Mobile = _phoneNumber;
 
             var storedReferralCode = await LocalStorage.GetItemAsync<string>("referral:code");
-            if (!string.IsNullOrWhiteSpace(storedReferralCode))
+            var effectiveReferralCode = !string.IsNullOrWhiteSpace(_referralCode)
+                ? _referralCode
+                : storedReferralCode;
+            if (!string.IsNullOrWhiteSpace(effectiveReferralCode))
             {
-                _verifyRequest.ParentReferralCode = storedReferralCode;
+                _verifyRequest.ParentReferralCode = effectiveReferralCode;
             }
 
             var validationResult = true; // _verifyRequestValidator.Validate(_verifyRequest);

src/FrontOffice.Main/Shared/PhoneVerifyForm.razor

@@ -36,6 +36,14 @@
                      Color="Color.Primary"
                      Class="mb-2" />
 
+        <MudTextField Value="ReferralCode"
+                      ValueChanged="@((string? v) => ReferralCodeChanged.InvokeAsync(v))"
+                      Label="کد معرف (اختیاری)"
+                      Variant="Variant.Outlined"
+                      Immediate="true"
+                      Placeholder="کد معرف را وارد کنید"
+                      Class="mb-3" />
+
         @if (!string.IsNullOrWhiteSpace(ErrorMessage))
         {
             <MudAlert Severity="Severity.Error" Dense="true" Elevation="0"

src/FrontOffice.Main/Shared/PhoneVerifyForm.razor.cs

@@ -29,6 +29,10 @@ public partial class PhoneVerifyForm
     [Parameter] public string? PhoneNumber { get; set; }
     [Parameter] public int ResendRemaining { get; set; }
 
+    // ── Referral ──
+    [Parameter] public string? ReferralCode { get; set; }
+    [Parameter] public EventCallback<string?> ReferralCodeChanged { get; set; }
+
     // ── Verify actions ──
     [Parameter] public EventCallback OnChangePhone { get; set; }
     [Parameter] public EventCallback OnResendOtp { get; set; }