feat: add referral code support to phone verification form

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);