前端：

修复了已知问题
后端：
修复了已知问题

backend/IM_API/Dtos/BaseResponse.cs

@@ -73,6 +73,10 @@ namespace IM_API.Dtos
             this.Code = codeDefine.Code;
             this.Message = codeDefine.Message;
         }
-        public BaseResponse() { }
+        public BaseResponse()
+        {
+            this.Code = CodeDefine.SUCCESS.Code;
+            this.Message = CodeDefine.SUCCESS.Message;
+        }
     }
 }

backend/IM_API/Dtos/FriendRequestDto.cs

@@ -4,7 +4,7 @@ namespace IM_API.Dtos
 {
     public class FriendRequestDto
     {
-        public int FromUserId { get; set; }
+        public int? FromUserId { get; set; }
         public int ToUserId { get; set; }
         [Required(ErrorMessage = "备注名必填")]
         [StringLength(20, ErrorMessage = "备注名不能超过20位字符")]

backend/IM_API/Dtos/FriendRequestResDto.cs

@@ -0,0 +1,36 @@
+using IM_API.Models;
+
+namespace IM_API.Dtos
+{
+    public class FriendRequestResDto
+    {
+        public int Id { get; set; }
+
+        /// <summary>
+        /// 申请人	
+        /// </summary>
+        public int RequestUser { get; set; }
+
+        /// <summary>
+        /// 被申请人	
+        /// </summary>
+        public int ResponseUser { get; set; }
+        public string Avatar { get; set; }
+        public string NickName { get; set; }
+
+        /// <summary>
+        /// 申请时间	
+        /// </summary>
+        public DateTime Created { get; set; }
+
+        /// <summary>
+        /// 申请附言	
+        /// </summary>
+        public string? Description { get; set; }
+
+        /// <summary>
+        /// 申请状态（0：待通过,1:拒绝,2:同意,3：拉黑）	
+        /// </summary>
+        public FriendRequestState State { get; set; }
+    }
+}