dto：创建API响应数据传输对象

- 创建LoginResponseDto、RegisterResponseDto等响应DTO
- 定义标准化的API响应格式
- 添加完整的Swagger类型定义

src/business/login/login-response.dto.ts

@@ -0,0 +1,267 @@
+/**
+ * 登录业务响应数据传输对象
+ * 
+ * 功能描述：
+ * - 定义登录相关API的响应数据结构
+ * - 提供Swagger文档生成支持
+ * - 确保API响应的数据格式一致性
+ * 
+ * @author moyin
+ * @version 1.0.0
+ * @since 2025-12-17
+ */
+
+import { ApiProperty } from '@nestjs/swagger';
+
+/**
+ * 用户信息响应DTO
+ */
+export class UserInfoDto {
+  @ApiProperty({
+    description: '用户ID',
+    example: '1'
+  })
+  id: string;
+
+  @ApiProperty({
+    description: '用户名',
+    example: 'testuser'
+  })
+  username: string;
+
+  @ApiProperty({
+    description: '用户昵称',
+    example: '测试用户'
+  })
+  nickname: string;
+
+  @ApiProperty({
+    description: '邮箱地址',
+    example: 'test@example.com',
+    required: false
+  })
+  email?: string;
+
+  @ApiProperty({
+    description: '手机号码',
+    example: '+8613800138000',
+    required: false
+  })
+  phone?: string;
+
+  @ApiProperty({
+    description: '头像URL',
+    example: 'https://example.com/avatar.jpg',
+    required: false
+  })
+  avatar_url?: string;
+
+  @ApiProperty({
+    description: '用户角色',
+    example: 1
+  })
+  role: number;
+
+  @ApiProperty({
+    description: '创建时间',
+    example: '2025-12-17T10:00:00.000Z'
+  })
+  created_at: Date;
+}
+
+/**
+ * 登录响应数据DTO
+ */
+export class LoginResponseDataDto {
+  @ApiProperty({
+    description: '用户信息',
+    type: UserInfoDto
+  })
+  user: UserInfoDto;
+
+  @ApiProperty({
+    description: '访问令牌',
+    example: 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...'
+  })
+  access_token: string;
+
+  @ApiProperty({
+    description: '刷新令牌',
+    example: 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...',
+    required: false
+  })
+  refresh_token?: string;
+
+  @ApiProperty({
+    description: '是否为新用户',
+    example: false,
+    required: false
+  })
+  is_new_user?: boolean;
+
+  @ApiProperty({
+    description: '响应消息',
+    example: '登录成功'
+  })
+  message: string;
+}
+
+/**
+ * 登录响应DTO
+ */
+export class LoginResponseDto {
+  @ApiProperty({
+    description: '请求是否成功',
+    example: true
+  })
+  success: boolean;
+
+  @ApiProperty({
+    description: '响应数据',
+    type: LoginResponseDataDto,
+    required: false
+  })
+  data?: LoginResponseDataDto;
+
+  @ApiProperty({
+    description: '响应消息',
+    example: '登录成功'
+  })
+  message: string;
+
+  @ApiProperty({
+    description: '错误代码',
+    example: 'LOGIN_FAILED',
+    required: false
+  })
+  error_code?: string;
+}
+
+/**
+ * 注册响应DTO
+ */
+export class RegisterResponseDto {
+  @ApiProperty({
+    description: '请求是否成功',
+    example: true
+  })
+  success: boolean;
+
+  @ApiProperty({
+    description: '响应数据',
+    type: LoginResponseDataDto,
+    required: false
+  })
+  data?: LoginResponseDataDto;
+
+  @ApiProperty({
+    description: '响应消息',
+    example: '注册成功'
+  })
+  message: string;
+
+  @ApiProperty({
+    description: '错误代码',
+    example: 'REGISTER_FAILED',
+    required: false
+  })
+  error_code?: string;
+}
+
+/**
+ * GitHub OAuth响应DTO
+ */
+export class GitHubOAuthResponseDto {
+  @ApiProperty({
+    description: '请求是否成功',
+    example: true
+  })
+  success: boolean;
+
+  @ApiProperty({
+    description: '响应数据',
+    type: LoginResponseDataDto,
+    required: false
+  })
+  data?: LoginResponseDataDto;
+
+  @ApiProperty({
+    description: '响应消息',
+    example: 'GitHub登录成功'
+  })
+  message: string;
+
+  @ApiProperty({
+    description: '错误代码',
+    example: 'GITHUB_OAUTH_FAILED',
+    required: false
+  })
+  error_code?: string;
+}
+
+/**
+ * 忘记密码响应数据DTO
+ */
+export class ForgotPasswordResponseDataDto {
+  @ApiProperty({
+    description: '验证码（仅用于演示，实际应用中不应返回）',
+    example: '123456',
+    required: false
+  })
+  verification_code?: string;
+}
+
+/**
+ * 忘记密码响应DTO
+ */
+export class ForgotPasswordResponseDto {
+  @ApiProperty({
+    description: '请求是否成功',
+    example: true
+  })
+  success: boolean;
+
+  @ApiProperty({
+    description: '响应数据',
+    type: ForgotPasswordResponseDataDto,
+    required: false
+  })
+  data?: ForgotPasswordResponseDataDto;
+
+  @ApiProperty({
+    description: '响应消息',
+    example: '验证码已发送，请查收'
+  })
+  message: string;
+
+  @ApiProperty({
+    description: '错误代码',
+    example: 'SEND_CODE_FAILED',
+    required: false
+  })
+  error_code?: string;
+}
+
+/**
+ * 通用响应DTO（用于重置密码、修改密码等）
+ */
+export class CommonResponseDto {
+  @ApiProperty({
+    description: '请求是否成功',
+    example: true
+  })
+  success: boolean;
+
+  @ApiProperty({
+    description: '响应消息',
+    example: '操作成功'
+  })
+  message: string;
+
+  @ApiProperty({
+    description: '错误代码',
+    example: 'OPERATION_FAILED',
+    required: false
+  })
+  error_code?: string;
+}