feat: add referral qrcode generation provider

Tiku.Application/Growth/ReferralModels.cs

@@ -29,6 +29,19 @@ public sealed record ReferralQrcodeCommand(
     string? QrcodeUrl,
     JsonElement? Metadata);
 
+public sealed record ReferralQrcodeGenerateRequest(
+    Guid TenantId,
+    Guid UserId,
+    string RefCode,
+    string Provider,
+    string Page,
+    string Scene);
+
+public sealed record ReferralQrcodeGenerateResult(
+    string QrcodeUrl,
+    string Provider,
+    JsonElement Metadata);
+
 public sealed record ReferralStatsQuery(Guid? ReferrerUserId = null, int? Limit = null);
 
 public sealed record ReferralConversionQuery(Guid? ReferrerUserId = null, DateOnly? StartDate = null, DateOnly? EndDate = null, int? Days = null, int? Limit = null);
@@ -188,6 +201,13 @@ public interface IReferralService
         CancellationToken cancellationToken = default);
 }
 
+public interface IReferralQrcodeGenerator
+{
+    Task<ReferralQrcodeGenerateResult> GenerateAsync(
+        ReferralQrcodeGenerateRequest request,
+        CancellationToken cancellationToken = default);
+}
+
 public sealed class ReferralException(string message, string code) : Exception(message)
 {
     public string Code { get; } = code;