后端：

新增好友请求事件和好友已添加事件

backend/IM_API/Domain/Events/FriendAddEvent.cs

@@ -8,12 +8,12 @@ namespace IM_API.Domain.Events
         /// <summary>
         /// 发起请求用户
         /// </summary>
-        public UserInfoDto RequestUser { get; init; }
+        public int RequestUserId { get; init; }
         public string? requestUserRemarkname { get; init; }
         /// <summary>
         /// 接受请求用户
         /// </summary>
-        public UserInfoDto ResponseUser { get; init; }
+        public int ResponseUserId { get; init; }
 
         public FriendRequestDto RequestInfo { get; init; }
         /// <summary>

backend/IM_API/Domain/Events/RequestFriendEvent.cs

@@ -0,0 +1,10 @@
+namespace IM_API.Domain.Events
+{
+    public record RequestFriendEvent : DomainEvent
+    {
+        public override string EventType => "IM.FRIENDS_FRIEND_REQUEST";
+        public int FromUserId { get; init; }
+        public int ToUserId { get; init; }
+        public string Description { get; init; }
+    }
+}