refactor: 邀请码逻辑调整，支持双方填写/使用邀请码统计，并移除已被邀请状态字段

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain/Entities/InviteCodeAggregateRoot.cs

@@ -19,7 +19,6 @@ public class InviteCodeAggregateRoot : FullAuditedAggregateRoot<Guid>
     {
         UserId = userId;
         Code = code;
-        IsUserInvited = false;
         UsedCount = 0;
     }
 
@@ -33,12 +32,7 @@ public class InviteCodeAggregateRoot : FullAuditedAggregateRoot<Guid>
     /// </summary>
     [SugarColumn(Length = 50)]
     public string Code { get; set; } = string.Empty;
-
-    /// <summary>
-    /// 邀请码拥有者是否已被他人邀请（被邀请后不可再提供邀请码）
-    /// </summary>
-    public bool IsUserInvited { get; set; }
-
+    
     /// <summary>
     /// 被使用次数（统计用，一个邀请码可以被多人使用）
     /// </summary>
@@ -49,12 +43,5 @@ public class InviteCodeAggregateRoot : FullAuditedAggregateRoot<Guid>
     /// </summary>
     [SugarColumn(Length = 500, IsNullable = true)]
     public string? Remark { get; set; }
-
-    /// <summary>
-    /// 标记用户已被邀请
-    /// </summary>
-    public void MarkUserAsInvited()
-    {
-        IsUserInvited = true;
-    }
+    
 }