add(接口)：添加授权、用户、好友关系服务接口

backend/IM_API/Dtos/BaseResponse.cs

@@ -0,0 +1,57 @@
+namespace IM_API.Dtos
+{
+    public class BaseResponse<T>
+    {
+        //响应状态码
+        public int Code { get; set; }
+        //响应消息
+        public string Message { get; set; }
+        //响应数据
+        public T? Data { get; set; }
+        /// <summary>
+        /// 默认成功响应返回
+        /// </summary>
+        /// <param name="msg"></param>
+        /// <param name="data"></param>
+        public BaseResponse(string msg,T data)
+        {
+            this.Code = 0;
+            this.Message = msg;
+            this.Data = data;
+        }
+        /// <summary>
+        /// 默认成功响应返回，不带数据
+        /// </summary>
+        /// <param name="msg"></param>
+        /// <param name="data"></param>
+        public BaseResponse(string msg)
+        {
+            this.Code = 0;
+            this.Message = msg;
+        }
+        /// <summary>
+        /// 非成功响应且带数据
+        /// </summary>
+        /// <param name="code"></param>
+        /// <param name="message"></param>
+        /// <param name="data"></param>
+        public BaseResponse(int code, string message, T? data)
+        {
+            Code = code;
+            Message = message;
+            Data = data;
+        }
+        /// <summary>
+        /// 非成功响应且不带数据
+        /// </summary>
+        /// <param name="code"></param>
+        /// <param name="message"></param>
+        /// <param name="data"></param>
+        public BaseResponse(int code, string message)
+        {
+            Code = code;
+            Message = message;
+        }
+        public BaseResponse() { }
+    }
+}

backend/IM_API/Dtos/FriendRequestDto.cs

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+namespace IM_API.Dtos
+{
+    public class FriendRequestDto
+    {
+        public int FromUserId { get; set; }
+        public int ToUserId { get; set; }
+        public string? Description { get; set; }
+    }
+}

backend/IM_API/Dtos/LoginDto.cs

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+namespace IM_API.Dtos
+{
+    public class LoginDto
+    {
+        public int Id { get; set; }
+        public string Token { get; set; }
+        public string RefreshToken { get; set; }
+    }
+}

backend/IM_API/Dtos/LoginRequestDto.cs

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+namespace IM_API.Dtos
+{
+    public class LoginRequestDto
+    {
+        public string Username { get; set; }
+        public string Password { get; set; }
+    }
+}

backend/IM_API/Dtos/RegisterRequestDto.cs

@@ -0,0 +1,8 @@
+namespace IM_API.Dtos
+{
+    public class RegisterRequestDto
+    {
+        public string Username { get; set; }
+        public string Password { get; set; }
+    }
+}

backend/IM_API/Dtos/UpdateUserDto.cs

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+namespace IM_API.Dtos
+{
+    public class UpdateUserDto
+    {
+        public string? NickName { get; set; }
+    }
+}

backend/IM_API/Dtos/UserInfoDto.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace IM_API.Dtos
+{
+    public class UserInfoDto
+    {
+        public int Id { get; set; }
+
+        /// <summary>
+        /// 唯一用户名
+        /// </summary>
+        public string Username { get; set; }
+
+        /// <summary>
+        /// 用户昵称
+        /// </summary>
+        public string NickName { get; set; }
+
+        /// <summary>
+        /// 用户在线状态
+        /// 0（默认）：不在线
+        /// 1：在线
+        /// </summary>
+        public sbyte OlineStatus { get; set; }
+
+        /// <summary>
+        /// 创建时间
+        /// </summary>
+        public DateTime Created { get; set; }
+
+        /// <summary>
+        /// 账户状态
+        /// (0：未激活,1：正常,2：封禁)
+        /// </summary>
+        public sbyte Status { get; set; }
+    }
+}