feat(sql, auth, email, dto)：重构邮箱验证流程，引入基于内存的用户服务，并改进 API 响应处理

* 新增完整的 API 状态码文档，并对测试模式进行特殊处理（`206 Partial Content`）
* 重组 DTO 结构，引入 `app.dto.ts` 与 `error_response.dto.ts`，以实现统一、规范的响应格式
* 重构登录相关 DTO，优化命名与结构，提升可维护性
* 实现基于内存的用户服务（`users_memory.service.ts`），用于开发与测试环境
* 更新邮件服务，增强验证码生成逻辑，并支持测试模式自动识别
* 增强登录控制器与服务层的错误处理能力，统一响应行为
* 优化核心登录服务，强化参数校验并集成邮箱验证流程
* 新增 `@types/express` 依赖，提升 TypeScript 类型支持与开发体验
* 改进 `main.ts`，优化应用初始化流程与配置管理
* 在所有服务中统一错误处理机制，采用标准化的错误响应格式
* 实现测试模式（`206`）与生产环境邮件发送（`200`）之间的无缝切换

.env.example

@@ -0,0 +1,36 @@
+# 环境配置模板
+
+# 数据库配置
+# DB_HOST=localhost
+# DB_PORT=3306
+# DB_USERNAME=your_db_username
+# DB_PASSWORD=your_db_password
+# DB_NAME=your_db_name
+
+# 应用配置
+NODE_ENV=production
+PORT=3000
+LOG_LEVEL=info
+
+# JWT 配置（如果有的话）
+JWT_SECRET=your_jwt_secret_key_here_at_least_32_characters
+JWT_EXPIRES_IN=7d
+
+# Redis 配置（用于验证码存储）
+# 生产环境使用真实Redis服务
+USE_FILE_REDIS=false
+REDIS_HOST=your_redis_host
+REDIS_PORT=6379
+REDIS_PASSWORD=your_redis_password
+REDIS_DB=0
+
+# 邮件服务配置
+# EMAIL_HOST=smtp.gmail.com
+# EMAIL_PORT=587
+# EMAIL_SECURE=false
+# EMAIL_USER=your_email@gmail.com
+# EMAIL_PASS=your_app_password
+# EMAIL_FROM="Whale Town Game" <noreply@whaletown.com>
+
+# 其他配置
+# 根据项目需要添加其他环境变量

docs/API_STATUS_CODES.md

@@ -0,0 +1,257 @@
+# API 状态码说明
+
+## 📊 概述
+
+本文档说明了项目中使用的 HTTP 状态码，特别是针对邮件发送功能的特殊状态码处理。
+
+## 🔢 标准状态码
+
+| 状态码 | 含义 | 使用场景 |
+|--------|------|----------|
+| 200 | OK | 请求成功 |
+| 201 | Created | 资源创建成功（如用户注册） |
+| 400 | Bad Request | 请求参数错误 |
+| 401 | Unauthorized | 未授权（如密码错误） |
+| 403 | Forbidden | 权限不足 |
+| 404 | Not Found | 资源不存在 |
+| 409 | Conflict | 资源冲突（如用户名已存在） |
+| 429 | Too Many Requests | 请求频率过高 |
+| 500 | Internal Server Error | 服务器内部错误 |
+
+## 🎯 特殊状态码
+
+### 206 Partial Content - 测试模式
+
+**使用场景：** 邮件发送功能在测试模式下使用
+
+**含义：** 请求部分成功，但未完全达到预期效果
+
+**具体应用：**
+- 验证码已生成，但邮件未真实发送
+- 功能正常工作，但处于测试/开发模式
+- 用户可以获得验证码进行测试，但需要知道这不是真实发送
+
+**响应示例：**
+
+```json
+{
+  "success": false,
+  "data": {
+    "verification_code": "123456",
+    "is_test_mode": true
+  },
+  "message": "⚠️ 测试模式：验证码已生成但未真实发送。请在控制台查看验证码，或配置邮件服务以启用真实发送。",
+  "error_code": "TEST_MODE_ONLY"
+}
+```
+
+## 📧 邮件发送接口状态码
+
+### 发送邮箱验证码 - POST /auth/send-email-verification
+
+| 状态码 | 场景 | 响应 |
+|--------|------|------|
+| 200 | 邮件真实发送成功 | `{ "success": true, "message": "验证码已发送，请查收邮件" }` |
+| 206 | 测试模式 | `{ "success": false, "error_code": "TEST_MODE_ONLY", "data": { "verification_code": "123456", "is_test_mode": true } }` |
+| 400 | 参数错误 | `{ "success": false, "message": "邮箱格式错误" }` |
+| 429 | 发送频率过高 | `{ "success": false, "message": "发送频率过高，请稍后重试" }` |
+
+### 发送密码重置验证码 - POST /auth/forgot-password
+
+| 状态码 | 场景 | 响应 |
+|--------|------|------|
+| 200 | 邮件真实发送成功 | `{ "success": true, "message": "验证码已发送，请查收" }` |
+| 206 | 测试模式 | `{ "success": false, "error_code": "TEST_MODE_ONLY", "data": { "verification_code": "123456", "is_test_mode": true } }` |
+| 400 | 参数错误 | `{ "success": false, "message": "邮箱格式错误" }` |
+| 404 | 用户不存在 | `{ "success": false, "message": "用户不存在" }` |
+
+### 重新发送邮箱验证码 - POST /auth/resend-email-verification
+
+| 状态码 | 场景 | 响应 |
+|--------|------|------|
+| 200 | 邮件真实发送成功 | `{ "success": true, "message": "验证码已重新发送，请查收邮件" }` |
+| 206 | 测试模式 | `{ "success": false, "error_code": "TEST_MODE_ONLY", "data": { "verification_code": "123456", "is_test_mode": true } }` |
+| 400 | 邮箱已验证或用户不存在 | `{ "success": false, "message": "邮箱已验证，无需重复验证" }` |
+| 429 | 发送频率过高 | `{ "success": false, "message": "发送频率过高，请稍后重试" }` |
+
+## 🔄 模式切换
+
+### 测试模式 → 真实发送模式
+
+**配置前（测试模式）：**
+```bash
+curl -X POST http://localhost:3000/auth/send-email-verification \
+  -H "Content-Type: application/json" \
+  -d '{"email": "test@example.com"}'
+
+# 响应：206 Partial Content
+{
+  "success": false,
+  "data": {
+    "verification_code": "123456",
+    "is_test_mode": true
+  },
+  "message": "⚠️ 测试模式：验证码已生成但未真实发送...",
+  "error_code": "TEST_MODE_ONLY"
+}
+```
+
+**配置后（真实发送模式）：**
+```bash
+# 同样的请求
+curl -X POST http://localhost:3000/auth/send-email-verification \
+  -H "Content-Type: application/json" \
+  -d '{"email": "test@example.com"}'
+
+# 响应：200 OK
+{
+  "success": true,
+  "data": {
+    "is_test_mode": false
+  },
+  "message": "验证码已发送，请查收邮件"
+}
+```
+
+## 💡 前端处理建议
+
+### JavaScript 示例
+
+```javascript
+async function sendEmailVerification(email) {
+  try {
+    const response = await fetch('/auth/send-email-verification', {
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+      body: JSON.stringify({ email }),
+    });
+
+    const data = await response.json();
+
+    if (response.status === 200) {
+      // 真实发送成功
+      showSuccess('验证码已发送，请查收邮件');
+    } else if (response.status === 206) {
+      // 测试模式
+      showWarning(`测试模式：验证码是 ${data.data.verification_code}`);
+      showInfo('请配置邮件服务以启用真实发送');
+    } else {
+      // 其他错误
+      showError(data.message);
+    }
+  } catch (error) {
+    showError('网络错误，请稍后重试');
+  }
+}
+```
+
+### React 示例
+
+```jsx
+const handleSendVerification = async (email) => {
+  try {
+    const response = await fetch('/auth/send-email-verification', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ email }),
+    });
+
+    const data = await response.json();
+
+    switch (response.status) {
+      case 200:
+        setMessage({ type: 'success', text: '验证码已发送，请查收邮件' });
+        break;
+      case 206:
+        setMessage({ 
+          type: 'warning', 
+          text: `测试模式：验证码是 ${data.data.verification_code}` 
+        });
+        setShowConfigTip(true);
+        break;
+      case 400:
+        setMessage({ type: 'error', text: data.message });
+        break;
+      case 429:
+        setMessage({ type: 'error', text: '发送频率过高，请稍后重试' });
+        break;
+      default:
+        setMessage({ type: 'error', text: '发送失败，请稍后重试' });
+    }
+  } catch (error) {
+    setMessage({ type: 'error', text: '网络错误，请稍后重试' });
+  }
+};
+```
+
+## 🎨 UI 展示建议
+
+### 测试模式提示
+
+```html
+<!-- 成功状态 (200) -->
+<div class="alert alert-success">
+  ✅ 验证码已发送，请查收邮件
+</div>
+
+<!-- 测试模式 (206) -->
+<div class="alert alert-warning">
+  ⚠️ 测试模式：验证码是 123456
+  <br>
+  <small>请配置邮件服务以启用真实发送</small>
+</div>
+
+<!-- 错误状态 (400+) -->
+<div class="alert alert-danger">
+  ❌ 发送失败：邮箱格式错误
+</div>
+```
+
+## 📝 开发建议
+
+### 1. 状态码检查
+
+```javascript
+// 推荐：明确检查状态码
+if (response.status === 206) {
+  // 处理测试模式
+} else if (response.status === 200) {
+  // 处理真实发送
+}
+
+// 不推荐：只检查 success 字段
+if (data.success) {
+  // 可能遗漏测试模式的情况
+}
+```
+
+### 2. 错误处理
+
+```javascript
+// 推荐：根据 error_code 进行精确处理
+switch (data.error_code) {
+  case 'TEST_MODE_ONLY':
+    handleTestMode(data);
+    break;
+  case 'SEND_CODE_FAILED':
+    handleSendFailure(data);
+    break;
+  default:
+    handleGenericError(data);
+}
+```
+
+### 3. 用户体验
+
+- **测试模式**：清晰提示用户当前处于测试模式
+- **配置引导**：提供配置邮件服务的链接或说明
+- **验证码显示**：在测试模式下直接显示验证码
+- **状态区分**：用不同的颜色和图标区分不同状态
+
+## 🔗 相关文档
+
+- [邮件服务配置指南](./EMAIL_CONFIGURATION.md)
+- [快速启动指南](./QUICK_START.md)
+- [API 文档](./api/README.md)

package.json

@@ -50,6 +50,7 @@
     "@nestjs/cli": "^10.4.9",
     "@nestjs/schematics": "^10.2.3",
     "@nestjs/testing": "^10.4.20",
+    "@types/express": "^5.0.6",
     "@types/jest": "^29.5.14",
     "@types/node": "^20.19.27",
     "@types/nodemailer": "^6.4.14",

src/app.controller.ts

@@ -1,12 +1,49 @@
 import { Controller, Get } from '@nestjs/common';
+import { ApiTags, ApiOperation, ApiResponse } from '@nestjs/swagger';
 import { AppService } from './app.service';
+import { AppStatusResponseDto } from './dto/app.dto';
+import { ErrorResponseDto } from './dto/error_response.dto';
 
+/**
+ * 应用根控制器
+ * 
+ * 功能描述：
+ * - 提供应用基础信息和健康检查接口
+ * - 用于监控服务运行状态
+ * 
+ * @author moyin
+ * @version 1.0.0
+ * @since 2025-12-17
+ */
+@ApiTags('App')
 @Controller()
 export class AppController {
   constructor(private readonly appService: AppService) {}
 
+  /**
+   * 获取应用状态
+   * 
+   * 功能描述：
+   * 返回应用的基本运行状态信息，用于健康检查和监控
+   * 
+   * @returns 应用状态信息
+   */
   @Get()
-  getStatus(): string {
+  @ApiOperation({ 
+    summary: '获取应用状态',
+    description: '返回应用的基本运行状态信息，包括服务名称、版本、运行时间等。用于健康检查和服务监控。'
+  })
+  @ApiResponse({ 
+    status: 200, 
+    description: '成功获取应用状态',
+    type: AppStatusResponseDto
+  })
+  @ApiResponse({ 
+    status: 500, 
+    description: '服务器内部错误',
+    type: ErrorResponseDto
+  })
+  getStatus(): AppStatusResponseDto {
     return this.appService.getStatus();
   }
 }

src/app.module.ts

@@ -9,6 +9,29 @@ import { LoginCoreModule } from './core/login_core/login_core.module';
 import { LoginModule } from './business/login/login.module';
 import { RedisModule } from './core/redis/redis.module';
 
+/**
+ * 检查数据库配置是否完整 by angjustinl 2025-12-17
+ * 
+ * @returns 是否配置了数据库
+ */
+function isDatabaseConfigured(): boolean {
+  const requiredEnvVars = ['DB_HOST', 'DB_PORT', 'DB_USERNAME', 'DB_PASSWORD', 'DB_NAME'];
+  return requiredEnvVars.every(varName => process.env[varName]);
+}
+
+/**
+ * 应用主模块
+ * 
+ * 功能描述：
+ * - 整合所有功能模块
+ * - 配置全局服务和中间件
+ * - 支持数据库和内存存储的自动切换
+ * 
+ * 存储模式选择：
+ * - 如果配置了数据库环境变量，使用数据库模式
+ * - 如果未配置数据库，自动回退到内存模式
+ * - 内存模式适用于快速开发和测试
+ */
 @Module({
   imports: [
     ConfigModule.forRoot({
@@ -17,17 +40,25 @@ import { RedisModule } from './core/redis/redis.module';
     }),
     LoggerModule,
     RedisModule,
-    TypeOrmModule.forRoot({
+    // 条件导入TypeORM模块
-      type: 'mysql',
+    ...(isDatabaseConfigured() ? [
-      host: process.env.DB_HOST,
+      TypeOrmModule.forRoot({
-      port: parseInt(process.env.DB_PORT),
+        type: 'mysql',
-      username: process.env.DB_USERNAME,
+        host: process.env.DB_HOST,
-      password: process.env.DB_PASSWORD,
+        port: parseInt(process.env.DB_PORT),
-      database: process.env.DB_NAME,
+        username: process.env.DB_USERNAME,
-      entities: [__dirname + '/**/*.entity{.ts,.js}'],
+        password: process.env.DB_PASSWORD,
-      synchronize: false,
+        database: process.env.DB_NAME,
-    }),
+        entities: [__dirname + '/**/*.entity{.ts,.js}'],
-    UsersModule,
+        synchronize: false,
+        // 添加连接超时和重试配置
+        connectTimeout: 10000,
+        retryAttempts: 3,
+        retryDelay: 3000,
+      }),
+    ] : []),
+    // 根据数据库配置选择用户模块模式
+    isDatabaseConfigured() ? UsersModule.forDatabase() : UsersModule.forMemory(),
     LoginCoreModule,
     LoginModule,
   ],

src/app.service.ts

@@ -1,8 +1,52 @@
 import { Injectable } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { AppStatusResponseDto } from './dto/app.dto';
 
+/**
+ * 应用服务类
+ * 
+ * 功能描述：
+ * - 提供应用基础服务
+ * - 返回应用运行状态信息
+ * 
+ * @author angjustinl
+ * @version 1.0.0
+ * @since 2025-12-17
+ */
 @Injectable()
 export class AppService {
-  getStatus(): string {
+  private readonly startTime: number;
-    return 'Pixel Game Server is running!';
+
+  constructor(private readonly configService: ConfigService) {
+    this.startTime = Date.now();
+  }
+
+  /**
+   * 获取应用状态
+   * 
+   * @returns 应用状态信息
+   */
+  getStatus(): AppStatusResponseDto {
+    const isDatabaseConfigured = this.isDatabaseConfigured();
+    
+    return {
+      service: 'Pixel Game Server',
+      version: '1.0.0',
+      status: 'running',
+      timestamp: new Date().toISOString(),
+      uptime: Math.floor((Date.now() - this.startTime) / 1000),
+      environment: this.configService.get<string>('NODE_ENV', 'development'),
+      storage_mode: isDatabaseConfigured ? 'database' : 'memory'
+    };
+  }
+
+  /**
+   * 检查数据库配置是否完整
+   * 
+   * @returns 是否配置了数据库
+   */
+  private isDatabaseConfigured(): boolean {
+    const requiredEnvVars = ['DB_HOST', 'DB_PORT', 'DB_USERNAME', 'DB_PASSWORD', 'DB_NAME'];
+    return requiredEnvVars.every(varName => this.configService.get<string>(varName));
   }
 }

src/business/login/login.controller.ts

@@ -14,22 +14,25 @@
  * - POST /auth/reset-password - 重置密码
  * - PUT /auth/change-password - 修改密码
  * 
- * @author moyin
+ * @author moyin angjustinl
  * @version 1.0.0
  * @since 2025-12-17
  */
 
-import { Controller, Post, Put, Body, HttpCode, HttpStatus, ValidationPipe, UsePipes, Logger } from '@nestjs/common';
+import { Controller, Post, Put, Body, HttpCode, HttpStatus, ValidationPipe, UsePipes, Logger, Res } from '@nestjs/common';
 import { ApiTags, ApiOperation, ApiResponse as SwaggerApiResponse, ApiBody } from '@nestjs/swagger';
+import { Response } from 'express';
 import { LoginService, ApiResponse, LoginResponse } from './login.service';
-import { LoginDto, RegisterDto, GitHubOAuthDto, ForgotPasswordDto, ResetPasswordDto, ChangePasswordDto, EmailVerificationDto, SendEmailVerificationDto } from './login.dto';
+import { LoginDto, RegisterDto, GitHubOAuthDto, ForgotPasswordDto, ResetPasswordDto, ChangePasswordDto, EmailVerificationDto, SendEmailVerificationDto } from '../../dto/login.dto';
 import { 
   LoginResponseDto, 
   RegisterResponseDto, 
   GitHubOAuthResponseDto, 
   ForgotPasswordResponseDto, 
-  CommonResponseDto 
+  CommonResponseDto,
-} from './login-response.dto';
+  TestModeEmailVerificationResponseDto,
+  SuccessEmailVerificationResponseDto
+} from '../../dto/login_response.dto';
 
 @ApiTags('auth')
 @Controller('auth')
@@ -151,6 +154,7 @@ export class LoginController {
    * 发送密码重置验证码
    * 
    * @param forgotPasswordDto 忘记密码数据
+   * @param res Express响应对象
    * @returns 发送结果
    */
   @ApiOperation({ 
@@ -163,6 +167,11 @@ export class LoginController {
     description: '验证码发送成功', 
     type: ForgotPasswordResponseDto 
   })
+  @SwaggerApiResponse({ 
+    status: 206, 
+    description: '测试模式：验证码已生成但未真实发送', 
+    type: ForgotPasswordResponseDto 
+  })
   @SwaggerApiResponse({ 
     status: 400, 
     description: '请求参数错误' 
@@ -172,10 +181,21 @@ export class LoginController {
     description: '用户不存在' 
   })
   @Post('forgot-password')
-  @HttpCode(HttpStatus.OK)
   @UsePipes(new ValidationPipe({ transform: true }))
-  async forgotPassword(@Body() forgotPasswordDto: ForgotPasswordDto): Promise<ApiResponse<{ verification_code?: string }>> {
+  async forgotPassword(
-    return await this.loginService.sendPasswordResetCode(forgotPasswordDto.identifier);
+    @Body() forgotPasswordDto: ForgotPasswordDto,
+    @Res() res: Response
+  ): Promise<void> {
+    const result = await this.loginService.sendPasswordResetCode(forgotPasswordDto.identifier);
+    
+    // 根据结果设置不同的状态码
+    if (result.success) {
+      res.status(HttpStatus.OK).json(result);
+    } else if (result.error_code === 'TEST_MODE_ONLY') {
+      res.status(HttpStatus.PARTIAL_CONTENT).json(result); // 206 Partial Content
+    } else {
+      res.status(HttpStatus.BAD_REQUEST).json(result);
+    }
   }
 
   /**
@@ -256,6 +276,7 @@ export class LoginController {
    * 发送邮箱验证码
    * 
    * @param sendEmailVerificationDto 发送验证码数据
+   * @param res Express响应对象
    * @returns 发送结果
    */
   @ApiOperation({ 
@@ -265,8 +286,13 @@ export class LoginController {
   @ApiBody({ type: SendEmailVerificationDto })
   @SwaggerApiResponse({ 
     status: 200, 
-    description: '验证码发送成功', 
+    description: '验证码发送成功（真实发送模式）', 
-    type: ForgotPasswordResponseDto 
+    type: SuccessEmailVerificationResponseDto 
+  })
+  @SwaggerApiResponse({ 
+    status: 206, 
+    description: '测试模式：验证码已生成但未真实发送', 
+    type: TestModeEmailVerificationResponseDto 
   })
   @SwaggerApiResponse({ 
     status: 400, 
@@ -277,10 +303,21 @@ export class LoginController {
     description: '发送频率过高' 
   })
   @Post('send-email-verification')
-  @HttpCode(HttpStatus.OK)
   @UsePipes(new ValidationPipe({ transform: true }))
-  async sendEmailVerification(@Body() sendEmailVerificationDto: SendEmailVerificationDto): Promise<ApiResponse<{ verification_code?: string }>> {
+  async sendEmailVerification(
-    return await this.loginService.sendEmailVerification(sendEmailVerificationDto.email);
+    @Body() sendEmailVerificationDto: SendEmailVerificationDto,
+    @Res() res: Response
+  ): Promise<void> {
+    const result = await this.loginService.sendEmailVerification(sendEmailVerificationDto.email);
+    
+    // 根据结果设置不同的状态码
+    if (result.success) {
+      res.status(HttpStatus.OK).json(result);
+    } else if (result.error_code === 'TEST_MODE_ONLY') {
+      res.status(HttpStatus.PARTIAL_CONTENT).json(result); // 206 Partial Content
+    } else {
+      res.status(HttpStatus.BAD_REQUEST).json(result);
+    }
   }
 
   /**
@@ -317,6 +354,7 @@ export class LoginController {
    * 重新发送邮箱验证码
    * 
    * @param sendEmailVerificationDto 发送验证码数据
+   * @param res Express响应对象
    * @returns 发送结果
    */
   @ApiOperation({ 
@@ -329,6 +367,11 @@ export class LoginController {
     description: '验证码重新发送成功', 
     type: ForgotPasswordResponseDto 
   })
+  @SwaggerApiResponse({ 
+    status: 206, 
+    description: '测试模式：验证码已生成但未真实发送', 
+    type: ForgotPasswordResponseDto 
+  })
   @SwaggerApiResponse({ 
     status: 400, 
     description: '邮箱已验证或用户不存在' 
@@ -338,10 +381,21 @@ export class LoginController {
     description: '发送频率过高' 
   })
   @Post('resend-email-verification')
-  @HttpCode(HttpStatus.OK)
   @UsePipes(new ValidationPipe({ transform: true }))
-  async resendEmailVerification(@Body() sendEmailVerificationDto: SendEmailVerificationDto): Promise<ApiResponse<{ verification_code?: string }>> {
+  async resendEmailVerification(
-    return await this.loginService.resendEmailVerification(sendEmailVerificationDto.email);
+    @Body() sendEmailVerificationDto: SendEmailVerificationDto,
+    @Res() res: Response
+  ): Promise<void> {
+    const result = await this.loginService.resendEmailVerification(sendEmailVerificationDto.email);
+    
+    // 根据结果设置不同的状态码
+    if (result.success) {
+      res.status(HttpStatus.OK).json(result);
+    } else if (result.error_code === 'TEST_MODE_ONLY') {
+      res.status(HttpStatus.PARTIAL_CONTENT).json(result); // 206 Partial Content
+    } else {
+      res.status(HttpStatus.BAD_REQUEST).json(result);
+    }
   }
 
   /**

src/business/login/login.service.spec.ts

@@ -137,13 +137,31 @@ describe('LoginService', () => {
   });
 
   describe('sendPasswordResetCode', () => {
-    it('should return success response with verification code', async () => {
+    it('should return test mode response with verification code', async () => {
-      loginCoreService.sendPasswordResetCode.mockResolvedValue('123456');
+      loginCoreService.sendPasswordResetCode.mockResolvedValue({
+        code: '123456',
+        isTestMode: true
+      });
+
+      const result = await service.sendPasswordResetCode('test@example.com');
+
+      expect(result.success).toBe(false); // 测试模式下不算成功
+      expect(result.error_code).toBe('TEST_MODE_ONLY');
+      expect(result.data?.verification_code).toBe('123456');
+      expect(result.data?.is_test_mode).toBe(true);
+    });
+
+    it('should return success response for real email sending', async () => {
+      loginCoreService.sendPasswordResetCode.mockResolvedValue({
+        code: '123456',
+        isTestMode: false
+      });
 
       const result = await service.sendPasswordResetCode('test@example.com');
 
       expect(result.success).toBe(true);
-      expect(result.data?.verification_code).toBe('123456');
+      expect(result.data?.is_test_mode).toBe(false);
+      expect(result.data?.verification_code).toBeUndefined(); // 真实模式下不返回验证码
     });
   });
 

src/business/login/login.service.ts

@@ -11,7 +11,7 @@
  * - 调用核心服务完成具体功能
  * - 为控制器层提供业务接口
  * 
- * @author moyin
+ * @author moyin angjustinl
  * @version 1.0.0
  * @since 2025-12-17
  */
@@ -199,21 +199,37 @@ export class LoginService {
    * @param identifier 邮箱或手机号
    * @returns 响应结果
    */
-  async sendPasswordResetCode(identifier: string): Promise<ApiResponse<{ verification_code?: string }>> {
+  async sendPasswordResetCode(identifier: string): Promise<ApiResponse<{ verification_code?: string; is_test_mode?: boolean }>> {
     try {
       this.logger.log(`发送密码重置验证码: ${identifier}`);
 
       // 调用核心服务发送验证码
-      const verificationCode = await this.loginCoreService.sendPasswordResetCode(identifier);
+      const result = await this.loginCoreService.sendPasswordResetCode(identifier);
 
       this.logger.log(`密码重置验证码已发送: ${identifier}`);
 
-      // 实际应用中不应返回验证码，这里仅用于演示
+      // 根据是否为测试模式返回不同的状态和消息 by angjustinl 2025-12-17
-      return {
+      if (result.isTestMode) {
-        success: true,
+        // 测试模式：验证码生成但未真实发送
-        data: { verification_code: verificationCode },
+        return {
-        message: '验证码已发送，请查收'
+          success: false, // 测试模式下不算真正成功
-      };
+          data: { 
+            verification_code: result.code,
+            is_test_mode: true
+          },
+          message: '⚠️ 测试模式：验证码已生成但未真实发送。请在控制台查看验证码，或配置邮件服务以启用真实发送。',
+          error_code: 'TEST_MODE_ONLY'
+        };
+      } else {
+        // 真实发送模式
+        return {
+          success: true,
+          data: { 
+            is_test_mode: false
+          },
+          message: '验证码已发送，请查收'
+        };
+      }
     } catch (error) {
       this.logger.error(`发送密码重置验证码失败: ${identifier}`, error instanceof Error ? error.stack : String(error));
       
@@ -293,21 +309,37 @@ export class LoginService {
    * @param email 邮箱地址
    * @returns 响应结果
    */
-  async sendEmailVerification(email: string): Promise<ApiResponse<{ verification_code?: string }>> {
+  async sendEmailVerification(email: string): Promise<ApiResponse<{ verification_code?: string; is_test_mode?: boolean }>> {
     try {
       this.logger.log(`发送邮箱验证码: ${email}`);
 
       // 调用核心服务发送验证码
-      const verificationCode = await this.loginCoreService.sendEmailVerification(email);
+      const result = await this.loginCoreService.sendEmailVerification(email);
 
       this.logger.log(`邮箱验证码已发送: ${email}`);
 
-      // 实际应用中不应返回验证码，这里仅用于演示
+      // 根据是否为测试模式返回不同的状态和消息
-      return {
+      if (result.isTestMode) {
-        success: true,
+        // 测试模式：验证码生成但未真实发送
-        data: { verification_code: verificationCode },
+        return {
-        message: '验证码已发送，请查收邮件'
+          success: false, // 测试模式下不算真正成功
-      };
+          data: { 
+            verification_code: result.code,
+            is_test_mode: true
+          },
+          message: '⚠️ 测试模式：验证码已生成但未真实发送。请在控制台查看验证码，或配置邮件服务以启用真实发送。',
+          error_code: 'TEST_MODE_ONLY'
+        };
+      } else {
+        // 真实发送模式
+        return {
+          success: true,
+          data: { 
+            is_test_mode: false
+          },
+          message: '验证码已发送，请查收邮件'
+        };
+      }
     } catch (error) {
       this.logger.error(`发送邮箱验证码失败: ${email}`, error instanceof Error ? error.stack : String(error));
       
@@ -363,21 +395,37 @@ export class LoginService {
    * @param email 邮箱地址
    * @returns 响应结果
    */
-  async resendEmailVerification(email: string): Promise<ApiResponse<{ verification_code?: string }>> {
+  async resendEmailVerification(email: string): Promise<ApiResponse<{ verification_code?: string; is_test_mode?: boolean }>> {
     try {
       this.logger.log(`重新发送邮箱验证码: ${email}`);
 
       // 调用核心服务重新发送验证码
-      const verificationCode = await this.loginCoreService.resendEmailVerification(email);
+      const result = await this.loginCoreService.resendEmailVerification(email);
 
       this.logger.log(`邮箱验证码已重新发送: ${email}`);
 
-      // 实际应用中不应返回验证码，这里仅用于演示
+      // 根据是否为测试模式返回不同的状态和消息
-      return {
+      if (result.isTestMode) {
-        success: true,
+        // 测试模式：验证码生成但未真实发送
-        data: { verification_code: verificationCode },
+        return {
-        message: '验证码已重新发送，请查收邮件'
+          success: false, // 测试模式下不算真正成功
-      };
+          data: { 
+            verification_code: result.code,
+            is_test_mode: true
+          },
+          message: '⚠️ 测试模式：验证码已生成但未真实发送。请在控制台查看验证码，或配置邮件服务以启用真实发送。',
+          error_code: 'TEST_MODE_ONLY'
+        };
+      } else {
+        // 真实发送模式
+        return {
+          success: true,
+          data: { 
+            is_test_mode: false
+          },
+          message: '验证码已重新发送，请查收邮件'
+        };
+      }
     } catch (error) {
       this.logger.error(`重新发送邮箱验证码失败: ${email}`, error instanceof Error ? error.stack : String(error));
       

src/core/db/users/users.module.ts

@@ -4,23 +4,61 @@
  * 功能描述：
  * - 整合用户相关的实体、服务和控制器
  * - 配置TypeORM实体和Repository
+ * - 支持数据库和内存存储的动态切换 by angjustinl 2025-12-17
  * - 导出用户服务供其他模块使用
  * 
- * @author moyin
+ * 存储模式：by angjustinl 2025-12-17
- * @version 1.0.0
+ * - 数据库模式：使用TypeORM连接MySQL数据库
+ * - 内存模式：使用Map存储，适用于开发和测试
+ * 
+ * @author moyin angjustinl
+ * @version 1.0.1
  * @since 2025-12-17
  */
 
-import { Module } from '@nestjs/common';
+import { Module, DynamicModule, Global } from '@nestjs/common';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { Users } from './users.entity';
 import { UsersService } from './users.service';
+import { UsersMemoryService } from './users_memory.service';
 
-@Module({
+@Global()
-  imports: [
+@Module({})
-    TypeOrmModule.forFeature([Users])
+export class UsersModule {
-  ],
+  /**
-  providers: [UsersService],
+   * 创建数据库模式的用户模块
-  exports: [UsersService, TypeOrmModule],
+   * 
-})
+   * @returns 配置了TypeORM的动态模块
-export class UsersModule {}
+   */
+  static forDatabase(): DynamicModule {
+    return {
+      module: UsersModule,
+      imports: [TypeOrmModule.forFeature([Users])],
+      providers: [
+        {
+          provide: 'UsersService',
+          useClass: UsersService,
+        },
+      ],
+      exports: ['UsersService', TypeOrmModule],
+    };
+  }
+
+  /**
+   * 创建内存模式的用户模块
+   * 
+   * @returns 配置了内存存储的动态模块
+   */
+  static forMemory(): DynamicModule {
+    return {
+      module: UsersModule,
+      providers: [
+        {
+          provide: 'UsersService',
+          useClass: UsersMemoryService,
+        },
+      ],
+      exports: ['UsersService'],
+    };
+  }
+}

src/core/db/users/users_memory.service.ts

@@ -0,0 +1,349 @@
+/**
+ * 用户内存存储服务类
+ * 
+ * 功能描述：
+ * - 提供基于内存的用户数据存储
+ * - 作为数据库连接失败时的回退方案
+ * - 实现与UsersService相同的接口
+ * 
+ * 使用场景：
+ * - 开发环境无数据库时的快速启动
+ * - 测试环境的轻量级存储
+ * - 数据库故障时的临时降级
+ * 
+ * 注意事项：
+ * - 数据仅存储在内存中，重启后丢失
+ * - 不适用于生产环境
+ * - 性能优异但无持久化保证
+ * 
+ * @author angjustinl 
+ * @version 1.0.0
+ * @since 2025-12-17
+ */
+
+import { Injectable, ConflictException, NotFoundException, BadRequestException } from '@nestjs/common';
+import { Users } from './users.entity';
+import { CreateUserDto } from './users.dto';
+import { validate } from 'class-validator';
+import { plainToClass } from 'class-transformer';
+
+@Injectable()
+export class UsersMemoryService {
+  private users: Map<bigint, Users> = new Map();
+  private currentId: bigint = BigInt(1);
+
+  /**
+   * 创建新用户
+   * 
+   * @param createUserDto 创建用户的数据传输对象
+   * @returns 创建的用户实体
+   * @throws ConflictException 当用户名、邮箱或手机号已存在时
+   * @throws BadRequestException 当数据验证失败时
+   */
+  async create(createUserDto: CreateUserDto): Promise<Users> {
+    // 验证DTO
+    const dto = plainToClass(CreateUserDto, createUserDto);
+    const validationErrors = await validate(dto);
+    
+    if (validationErrors.length > 0) {
+      const errorMessages = validationErrors.map(error => 
+        Object.values(error.constraints || {}).join(', ')
+      ).join('; ');
+      throw new BadRequestException(`数据验证失败: ${errorMessages}`);
+    }
+
+    // 检查用户名是否已存在
+    if (createUserDto.username) {
+      const existingUser = await this.findByUsername(createUserDto.username);
+      if (existingUser) {
+        throw new ConflictException('用户名已存在');
+      }
+    }
+
+    // 检查邮箱是否已存在
+    if (createUserDto.email) {
+      const existingEmail = await this.findByEmail(createUserDto.email);
+      if (existingEmail) {
+        throw new ConflictException('邮箱已存在');
+      }
+    }
+
+    // 检查手机号是否已存在
+    if (createUserDto.phone) {
+      const existingPhone = Array.from(this.users.values()).find(
+        u => u.phone === createUserDto.phone
+      );
+      if (existingPhone) {
+        throw new ConflictException('手机号已存在');
+      }
+    }
+
+    // 检查GitHub ID是否已存在
+    if (createUserDto.github_id) {
+      const existingGithub = await this.findByGithubId(createUserDto.github_id);
+      if (existingGithub) {
+        throw new ConflictException('GitHub ID已存在');
+      }
+    }
+
+    // 创建用户实体
+    const user = new Users();
+    user.id = this.currentId++;
+    user.username = createUserDto.username;
+    user.email = createUserDto.email || null;
+    user.phone = createUserDto.phone || null;
+    user.password_hash = createUserDto.password_hash || null;
+    user.nickname = createUserDto.nickname;
+    user.github_id = createUserDto.github_id || null;
+    user.avatar_url = createUserDto.avatar_url || null;
+    user.role = createUserDto.role || 1;
+    user.email_verified = createUserDto.email_verified || false;
+    user.created_at = new Date();
+    user.updated_at = new Date();
+
+    // 保存到内存
+    this.users.set(user.id, user);
+    
+    return user;
+  }
+
+  /**
+   * 查询所有用户
+   * 
+   * @param limit 限制返回数量，默认100
+   * @param offset 偏移量，默认0
+   * @returns 用户列表
+   */
+  async findAll(limit: number = 100, offset: number = 0): Promise<Users[]> {
+    const allUsers = Array.from(this.users.values())
+      .sort((a, b) => b.created_at.getTime() - a.created_at.getTime());
+    
+    return allUsers.slice(offset, offset + limit);
+  }
+
+  /**
+   * 根据ID查询用户
+   * 
+   * @param id 用户ID
+   * @returns 用户实体
+   * @throws NotFoundException 当用户不存在时
+   */
+  async findOne(id: bigint): Promise<Users> {
+    const user = this.users.get(id);
+
+    if (!user) {
+      throw new NotFoundException(`ID为 ${id} 的用户不存在`);
+    }
+
+    return user;
+  }
+
+  /**
+   * 根据用户名查询用户
+   * 
+   * @param username 用户名
+   * @returns 用户实体或null
+   */
+  async findByUsername(username: string): Promise<Users | null> {
+    const user = Array.from(this.users.values()).find(
+      u => u.username === username
+    );
+    return user || null;
+  }
+
+  /**
+   * 根据邮箱查询用户
+   * 
+   * @param email 邮箱
+   * @returns 用户实体或null
+   */
+  async findByEmail(email: string): Promise<Users | null> {
+    const user = Array.from(this.users.values()).find(
+      u => u.email === email
+    );
+    return user || null;
+  }
+
+  /**
+   * 根据GitHub ID查询用户
+   * 
+   * @param githubId GitHub ID
+   * @returns 用户实体或null
+   */
+  async findByGithubId(githubId: string): Promise<Users | null> {
+    const user = Array.from(this.users.values()).find(
+      u => u.github_id === githubId
+    );
+    return user || null;
+  }
+
+  /**
+   * 更新用户信息
+   * 
+   * @param id 用户ID
+   * @param updateData 更新的数据
+   * @returns 更新后的用户实体
+   * @throws NotFoundException 当用户不存在时
+   * @throws ConflictException 当更新的数据与其他用户冲突时
+   */
+  async update(id: bigint, updateData: Partial<CreateUserDto>): Promise<Users> {
+    // 检查用户是否存在
+    const existingUser = await this.findOne(id);
+
+    // 检查更新数据的唯一性约束
+    if (updateData.username && updateData.username !== existingUser.username) {
+      const usernameExists = await this.findByUsername(updateData.username);
+      if (usernameExists) {
+        throw new ConflictException('用户名已存在');
+      }
+    }
+
+    if (updateData.email && updateData.email !== existingUser.email) {
+      const emailExists = await this.findByEmail(updateData.email);
+      if (emailExists) {
+        throw new ConflictException('邮箱已存在');
+      }
+    }
+
+    if (updateData.phone && updateData.phone !== existingUser.phone) {
+      const phoneExists = Array.from(this.users.values()).find(
+        u => u.phone === updateData.phone && u.id !== id
+      );
+      if (phoneExists) {
+        throw new ConflictException('手机号已存在');
+      }
+    }
+
+    if (updateData.github_id && updateData.github_id !== existingUser.github_id) {
+      const githubExists = await this.findByGithubId(updateData.github_id);
+      if (githubExists && githubExists.id !== id) {
+        throw new ConflictException('GitHub ID已存在');
+      }
+    }
+
+    // 更新用户数据
+    Object.assign(existingUser, updateData);
+    existingUser.updated_at = new Date();
+    
+    this.users.set(id, existingUser);
+    
+    return existingUser;
+  }
+
+  /**
+   * 删除用户
+   * 
+   * @param id 用户ID
+   * @returns 删除操作结果
+   * @throws NotFoundException 当用户不存在时
+   */
+  async remove(id: bigint): Promise<{ affected: number; message: string }> {
+    // 检查用户是否存在
+    await this.findOne(id);
+
+    // 执行删除
+    const deleted = this.users.delete(id);
+
+    return {
+      affected: deleted ? 1 : 0,
+      message: `成功删除ID为 ${id} 的用户`
+    };
+  }
+
+  /**
+   * 软删除用户（内存模式下与硬删除相同）
+   * 
+   * @param id 用户ID
+   * @returns 被删除的用户实体
+   */
+  async softRemove(id: bigint): Promise<Users> {
+    const user = await this.findOne(id);
+    this.users.delete(id);
+    return user;
+  }
+
+  /**
+   * 统计用户数量
+   * 
+   * @param conditions 查询条件（内存模式下简化处理）
+   * @returns 用户数量
+   */
+  async count(conditions?: any): Promise<number> {
+    if (!conditions) {
+      return this.users.size;
+    }
+    
+    // 简化的条件过滤
+    let count = 0;
+    for (const user of this.users.values()) {
+      let match = true;
+      for (const [key, value] of Object.entries(conditions)) {
+        if ((user as any)[key] !== value) {
+          match = false;
+          break;
+        }
+      }
+      if (match) count++;
+    }
+    
+    return count;
+  }
+
+  /**
+   * 检查用户是否存在
+   * 
+   * @param id 用户ID
+   * @returns 是否存在
+   */
+  async exists(id: bigint): Promise<boolean> {
+    return this.users.has(id);
+  }
+
+  /**
+   * 批量创建用户
+   * 
+   * @param createUserDtos 用户数据数组
+   * @returns 创建的用户列表
+   */
+  async createBatch(createUserDtos: CreateUserDto[]): Promise<Users[]> {
+    const users: Users[] = [];
+
+    for (const dto of createUserDtos) {
+      const user = await this.create(dto);
+      users.push(user);
+    }
+
+    return users;
+  }
+
+  /**
+   * 根据角色查询用户
+   * 
+   * @param role 角色值
+   * @returns 用户列表
+   */
+  async findByRole(role: number): Promise<Users[]> {
+    return Array.from(this.users.values())
+      .filter(u => u.role === role)
+      .sort((a, b) => b.created_at.getTime() - a.created_at.getTime());
+  }
+
+  /**
+   * 搜索用户（根据用户名或昵称）
+   * 
+   * @param keyword 搜索关键词
+   * @param limit 限制数量
+   * @returns 用户列表
+   */
+  async search(keyword: string, limit: number = 20): Promise<Users[]> {
+    const lowerKeyword = keyword.toLowerCase();
+    
+    return Array.from(this.users.values())
+      .filter(u => 
+        u.username.toLowerCase().includes(lowerKeyword) ||
+        u.nickname.toLowerCase().includes(lowerKeyword)
+      )
+      .sort((a, b) => b.created_at.getTime() - a.created_at.getTime())
+      .slice(0, limit);
+  }
+}

src/core/login_core/login_core.service.spec.ts

@@ -180,11 +180,15 @@ describe('LoginCoreService', () => {
       const verifiedUser = { ...mockUser, email_verified: true };
       usersService.findByEmail.mockResolvedValue(verifiedUser);
       verificationService.generateCode.mockResolvedValue('123456');
-      emailService.sendVerificationCode.mockResolvedValue(true);
+      emailService.sendVerificationCode.mockResolvedValue({
+        success: true,
+        isTestMode: true
+      });
 
-      const code = await service.sendPasswordResetCode('test@example.com');
+      const result = await service.sendPasswordResetCode('test@example.com');
 
-      expect(code).toMatch(/^\d{6}$/);
+      expect(result.code).toMatch(/^\d{6}$/);
+      expect(result.isTestMode).toBe(true);
     });
 
     it('should throw NotFoundException for non-existent user', async () => {

src/core/login_core/login_core.service.ts

@@ -16,10 +16,9 @@
  * @since 2025-12-17
  */
 
-import { Injectable, UnauthorizedException, ConflictException, NotFoundException, BadRequestException } from '@nestjs/common';
+import { Injectable, UnauthorizedException, ConflictException, NotFoundException, BadRequestException, Inject } from '@nestjs/common';
-import { UsersService } from '../db/users/users.service';
 import { Users } from '../db/users/users.entity';
-import { EmailService } from '../utils/email/email.service';
+import { EmailService, EmailSendResult } from '../utils/email/email.service';
 import { VerificationService, VerificationCodeType } from '../utils/verification/verification.service';
 import * as bcrypt from 'bcrypt';
 import * as crypto from 'crypto';
@@ -90,10 +89,20 @@ export interface AuthResult {
   isNewUser?: boolean;
 }
 
+/**
+ * 验证码发送结果接口 by angjustinl 2025-12-17
+ */
+export interface VerificationCodeResult {
+  /** 验证码 */
+  code: string;
+  /** 是否为测试模式 */
+  isTestMode: boolean;
+}
+
 @Injectable()
 export class LoginCoreService {
   constructor(
-    private readonly usersService: UsersService,
+    @Inject('UsersService') private readonly usersService: any,
     private readonly emailService: EmailService,
     private readonly verificationService: VerificationService,
   ) {}
@@ -122,7 +131,7 @@ export class LoginCoreService {
     // 如果邮箱未找到，尝试手机号查找（简单验证）
     if (!user && this.isPhoneNumber(identifier)) {
       const users = await this.usersService.findAll();
-      user = users.find(u => u.phone === identifier) || null;
+      user = users.find((u: Users) => u.phone === identifier) || null;
     }
 
     // 用户不存在
@@ -269,10 +278,10 @@ export class LoginCoreService {
    * 发送密码重置验证码
    * 
    * @param identifier 邮箱或手机号
-   * @returns 验证码（实际应用中应发送到用户邮箱/手机）
+   * @returns 验证码结果
    * @throws NotFoundException 用户不存在时
    */
-  async sendPasswordResetCode(identifier: string): Promise<string> {
+  async sendPasswordResetCode(identifier: string): Promise<VerificationCodeResult> {
     // 查找用户
     let user: Users | null = null;
 
@@ -285,7 +294,7 @@ export class LoginCoreService {
       }
     } else if (this.isPhoneNumber(identifier)) {
       const users = await this.usersService.findAll();
-      user = users.find(u => u.phone === identifier) || null;
+      user = users.find((u: Users) => u.phone === identifier) || null;
     }
 
     if (!user) {
@@ -299,23 +308,28 @@ export class LoginCoreService {
     );
 
     // 发送验证码
+    let isTestMode = false;
+    
     if (this.isEmail(identifier)) {
-      const success = await this.emailService.sendVerificationCode({
+      const result = await this.emailService.sendVerificationCode({
         email: identifier,
         code: verificationCode,
         nickname: user.nickname,
         purpose: 'password_reset'
       });
 
-      if (!success) {
+      if (!result.success) {
         throw new BadRequestException('验证码发送失败，请稍后重试');
       }
+      
+      isTestMode = result.isTestMode;
     } else {
       // TODO: 实现短信发送
       console.log(`短信验证码（${identifier}）: ${verificationCode}`);
+      isTestMode = true; // 短信也是测试模式
     }
     
-    return verificationCode; // 实际应用中不应返回验证码
+    return { code: verificationCode, isTestMode };
   }
 
   /**
@@ -347,7 +361,7 @@ export class LoginCoreService {
       user = await this.usersService.findByEmail(identifier);
     } else if (this.isPhoneNumber(identifier)) {
       const users = await this.usersService.findAll();
-      user = users.find(u => u.phone === identifier) || null;
+      user = users.find((u: Users) => u.phone === identifier) || null;
     }
 
     if (!user) {
@@ -457,9 +471,9 @@ export class LoginCoreService {
    * 
    * @param email 邮箱地址
    * @param nickname 用户昵称
-   * @returns 验证码
+   * @returns 验证码结果
    */
-  async sendEmailVerification(email: string, nickname?: string): Promise<string> {
+  async sendEmailVerification(email: string, nickname?: string): Promise<VerificationCodeResult> {
     // 生成验证码
     const verificationCode = await this.verificationService.generateCode(
       email,
@@ -467,18 +481,18 @@ export class LoginCoreService {
     );
 
     // 发送验证邮件
-    const success = await this.emailService.sendVerificationCode({
+    const result = await this.emailService.sendVerificationCode({
       email,
       code: verificationCode,
       nickname,
       purpose: 'email_verification'
     });
 
-    if (!success) {
+    if (!result.success) {
       throw new BadRequestException('验证邮件发送失败，请稍后重试');
     }
 
-    return verificationCode; // 实际应用中不应返回验证码
+    return { code: verificationCode, isTestMode: result.isTestMode };
   }
 
   /**
@@ -520,9 +534,9 @@ export class LoginCoreService {
    * 重新发送邮箱验证码
    * 
    * @param email 邮箱地址
-   * @returns 验证码
+   * @returns 验证码结果
    */
-  async resendEmailVerification(email: string): Promise<string> {
+  async resendEmailVerification(email: string): Promise<VerificationCodeResult> {
     const user = await this.usersService.findByEmail(email);
     
     if (!user) {

src/core/utils/email/email.service.ts

@@ -50,6 +50,18 @@ export interface VerificationEmailOptions {
   purpose: 'email_verification' | 'password_reset';
 }
 
+/**
+ * 邮件发送结果接口 by angjustinl 2025-12-17
+ */
+export interface EmailSendResult {
+  /** 是否成功 */
+  success: boolean;
+  /** 是否为测试模式 */
+  isTestMode: boolean;
+  /** 错误信息（如果失败） */
+  error?: string;
+}
+
 @Injectable()
 export class EmailService {
   private readonly logger = new Logger(EmailService.name);
@@ -87,13 +99,22 @@ export class EmailService {
     }
   }
 
+  /**
+   * 检查是否为测试模式
+   * 
+   * @returns 是否为测试模式
+   */
+  isTestMode(): boolean {
+    return !!(this.transporter.options as any).streamTransport;
+  }
+
   /**
    * 发送邮件
    * 
    * @param options 邮件选项
    * @returns 发送结果
    */
-  async sendEmail(options: EmailOptions): Promise<boolean> {
+  async sendEmail(options: EmailOptions): Promise<EmailSendResult> {
     try {
       const mailOptions = {
         from: this.configService.get<string>('EMAIL_FROM', '"Whale Town Game" <noreply@whaletown.com>'),
@@ -103,22 +124,31 @@ export class EmailService {
         text: options.text,
       };
 
-      const result = await this.transporter.sendMail(mailOptions);
+      const isTestMode = this.isTestMode();
 
       // 如果是测试模式，输出邮件内容到控制台
-      if ((this.transporter.options as any).streamTransport) {
+      if (isTestMode) {
-        this.logger.log('=== 邮件发送（测试模式） ===');
+        this.logger.warn('=== 邮件发送（测试模式 - 邮件未真实发送） ===');
-        this.logger.log(`收件人: ${options.to}`);
+        this.logger.warn(`收件人: ${options.to}`);
-        this.logger.log(`主题: ${options.subject}`);
+        this.logger.warn(`主题: ${options.subject}`);
-        this.logger.log(`内容: ${options.text || '请查看HTML内容'}`);
+        this.logger.warn(`内容: ${options.text || '请查看HTML内容'}`);
-        this.logger.log('========================');
+        this.logger.warn('⚠️  注意: 这是测试模式，邮件不会真实发送到用户邮箱');
+        this.logger.warn('💡 提示: 请在 .env 文件中配置邮件服务以启用真实发送');
+        this.logger.warn('================================================');
+        return { success: true, isTestMode: true };
       }
 
-      this.logger.log(`邮件发送成功: ${options.to}`);
+      // 真实发送邮件
-      return true;
+      const result = await this.transporter.sendMail(mailOptions);
+      this.logger.log(`✅ 邮件发送成功: ${options.to}`);
+      return { success: true, isTestMode: false };
     } catch (error) {
-      this.logger.error(`邮件发送失败: ${options.to}`, error instanceof Error ? error.stack : String(error));
+      this.logger.error(`❌ 邮件发送失败: ${options.to}`, error instanceof Error ? error.stack : String(error));
-      return false;
+      return { 
+        success: false, 
+        isTestMode: this.isTestMode(),
+        error: error instanceof Error ? error.message : String(error)
+      };
     }
   }
 
@@ -128,7 +158,7 @@ export class EmailService {
    * @param options 验证码邮件选项
    * @returns 发送结果
    */
-  async sendVerificationCode(options: VerificationEmailOptions): Promise<boolean> {
+  async sendVerificationCode(options: VerificationEmailOptions): Promise<EmailSendResult> {
     const { email, code, nickname, purpose } = options;
 
     let subject: string;
@@ -157,7 +187,7 @@ export class EmailService {
    * @param nickname 用户昵称
    * @returns 发送结果
    */
-  async sendWelcomeEmail(email: string, nickname: string): Promise<boolean> {
+  async sendWelcomeEmail(email: string, nickname: string): Promise<EmailSendResult> {
     const subject = '🎮 欢迎加入 Whale Town！';
     const template = this.getWelcomeTemplate(nickname);
 

src/dto/app.dto.ts

@@ -0,0 +1,72 @@
+/**
+ * 应用状态响应 DTO
+ * 
+ * 功能描述：
+ * - 定义应用状态接口的响应格式
+ * - 提供 Swagger 文档生成支持
+ * 
+ * @author angjustinl
+ * @version 1.0.0
+ * @since 2025-12-17
+ */
+
+import { ApiProperty } from '@nestjs/swagger';
+
+/**
+ * 应用状态响应 DTO
+ */
+export class AppStatusResponseDto {
+  @ApiProperty({
+    description: '服务名称',
+    example: 'Pixel Game Server',
+    type: String
+  })
+  service: string;
+
+  @ApiProperty({
+    description: '服务版本',
+    example: '1.0.0',
+    type: String
+  })
+  version: string;
+
+  @ApiProperty({
+    description: '运行状态',
+    example: 'running',
+    enum: ['running', 'starting', 'stopping', 'error'],
+    type: String
+  })
+  status: string;
+
+  @ApiProperty({
+    description: '当前时间戳',
+    example: '2025-12-17T15:00:00.000Z',
+    type: String,
+    format: 'date-time'
+  })
+  timestamp: string;
+
+  @ApiProperty({
+    description: '运行时间（秒）',
+    example: 3600,
+    type: Number,
+    minimum: 0
+  })
+  uptime: number;
+
+  @ApiProperty({
+    description: '运行环境',
+    example: 'development',
+    enum: ['development', 'production', 'test'],
+    type: String
+  })
+  environment: string;
+
+  @ApiProperty({
+    description: '存储模式',
+    example: 'memory',
+    enum: ['database', 'memory'],
+    type: String
+  })
+  storage_mode: 'database' | 'memory';
+}

src/dto/error_response.dto.ts

@@ -0,0 +1,56 @@
+/**
+ * 通用错误响应 DTO
+ * 
+ * 功能描述：
+ * - 定义统一的错误响应格式
+ * - 提供 Swagger 文档生成支持
+ * 
+ * @author angjustinl
+ * @version 1.0.0
+ * @since 2025-12-17
+ */
+
+import { ApiProperty } from '@nestjs/swagger';
+
+/**
+ * 通用错误响应 DTO
+ */
+export class ErrorResponseDto {
+  @ApiProperty({
+    description: 'HTTP 状态码',
+    example: 500,
+    type: Number
+  })
+  statusCode: number;
+
+  @ApiProperty({
+    description: '错误消息',
+    example: 'Internal server error',
+    type: String
+  })
+  message: string;
+
+  @ApiProperty({
+    description: '错误发生时间',
+    example: '2025-12-17T15:00:00.000Z',
+    type: String,
+    format: 'date-time'
+  })
+  timestamp: string;
+
+  @ApiProperty({
+    description: '请求路径',
+    example: '/api/status',
+    type: String,
+    required: false
+  })
+  path?: string;
+
+  @ApiProperty({
+    description: '错误代码',
+    example: 'INTERNAL_ERROR',
+    type: String,
+    required: false
+  })
+  error?: string;
+}

src/dto/login_response.dto.ts

@@ -209,6 +209,13 @@ export class ForgotPasswordResponseDataDto {
     required: false
   })
   verification_code?: string;
+
+  @ApiProperty({
+    description: '是否为测试模式',
+    example: true,
+    required: false
+  })
+  is_test_mode?: boolean;
 }
 
 /**
@@ -217,26 +224,76 @@ export class ForgotPasswordResponseDataDto {
 export class ForgotPasswordResponseDto {
   @ApiProperty({
     description: '请求是否成功',
-    example: true
+    example: false,
+    examples: {
+      success: {
+        summary: '真实发送成功',
+        value: true
+      },
+      testMode: {
+        summary: '测试模式',
+        value: false
+      }
+    }
   })
   success: boolean;
 
   @ApiProperty({
     description: '响应数据',
     type: ForgotPasswordResponseDataDto,
-    required: false
+    required: false,
+    examples: {
+      success: {
+        summary: '真实发送成功',
+        value: {
+          verification_code: '123456',
+          is_test_mode: false
+        }
+      },
+      testMode: {
+        summary: '测试模式',
+        value: {
+          verification_code: '059174',
+          is_test_mode: true
+        }
+      }
+    }
   })
   data?: ForgotPasswordResponseDataDto;
 
   @ApiProperty({
     description: '响应消息',
-    example: '验证码已发送，请查收'
+    example: '⚠️ 测试模式：验证码已生成但未真实发送。请在控制台查看验证码，或配置邮件服务以启用真实发送。',
+    examples: {
+      success: {
+        summary: '真实发送成功',
+        value: '验证码已发送，请查收'
+      },
+      testMode: {
+        summary: '测试模式',
+        value: '⚠️ 测试模式：验证码已生成但未真实发送。请在控制台查看验证码，或配置邮件服务以启用真实发送。'
+      }
+    }
   })
   message: string;
 
   @ApiProperty({
     description: '错误代码',
-    example: 'SEND_CODE_FAILED',
+    example: 'TEST_MODE_ONLY',
+    examples: {
+      success: {
+        summary: '真实发送成功',
+        value: null
+      },
+      testMode: {
+        summary: '测试模式',
+        value: 'TEST_MODE_ONLY'
+      },
+      failed: {
+        summary: '发送失败',
+        value: 'SEND_CODE_FAILED'
+      }
+    },
     required: false
   })
   error_code?: string;
@@ -265,3 +322,74 @@ export class CommonResponseDto {
   })
   error_code?: string;
 }
+
+/**
+ * 测试模式邮件验证码响应DTO by angjustinl 2025-12-17
+ */
+export class TestModeEmailVerificationResponseDto {
+  @ApiProperty({
+    description: '请求是否成功（测试模式下为false）',
+    example: false
+  })
+  success: boolean;
+
+  @ApiProperty({
+    description: '响应数据',
+    example: {
+      verification_code: '059174',
+      is_test_mode: true
+    }
+  })
+  data: {
+    verification_code: string;
+    is_test_mode: boolean;
+  };
+
+  @ApiProperty({
+    description: '响应消息',
+    example: '⚠️ 测试模式：验证码已生成但未真实发送。请在控制台查看验证码，或配置邮件服务以启用真实发送。'
+  })
+  message: string;
+
+  @ApiProperty({
+    description: '错误代码',
+    example: 'TEST_MODE_ONLY'
+  })
+  error_code: string;
+}
+
+/**
+ * 成功发送邮件验证码响应DTO
+ */
+export class SuccessEmailVerificationResponseDto {
+  @ApiProperty({
+    description: '请求是否成功',
+    example: true
+  })
+  success: boolean;
+
+  @ApiProperty({
+    description: '响应数据',
+    example: {
+      verification_code: '123456',
+      is_test_mode: false
+    }
+  })
+  data: {
+    verification_code: string;
+    is_test_mode: boolean;
+  };
+
+  @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: null,
+    required: false
+  })
+  error_code?: string;
+}

src/main.ts

@@ -3,8 +3,42 @@ import { AppModule } from './app.module';
 import { ValidationPipe } from '@nestjs/common';
 import { DocumentBuilder, SwaggerModule } from '@nestjs/swagger';
 
+/**
+ * 检查数据库配置是否完整 by angjustinl 2025-12-17
+ * 
+ * @returns 是否配置了数据库
+ */
+function isDatabaseConfigured(): boolean {
+  const requiredEnvVars = ['DB_HOST', 'DB_PORT', 'DB_USERNAME', 'DB_PASSWORD', 'DB_NAME'];
+  return requiredEnvVars.every(varName => process.env[varName]);
+}
+
+/**
+ * 打印启动横幅
+ */
+function printBanner() {
+  const isDatabaseMode = isDatabaseConfigured();
+  
+  console.log('\n' + '='.repeat(70));
+  console.log('🎮  Pixel Game Server');
+  console.log('='.repeat(70));
+  console.log(`📦  存储模式: ${isDatabaseMode ? '数据库模式 (MySQL)' : '内存模式 (Memory)'}`);
+  
+  if (!isDatabaseMode) {
+    console.log('⚠️   警告: 未检测到数据库配置，使用内存存储');
+    console.log('💡  提示: 数据将在服务重启后丢失');
+    console.log('📝  配置: 请在 .env 文件中配置数据库连接信息');
+  } else {
+    console.log('✅  数据库: 已连接到 MySQL 数据库');
+  }
+  
+  console.log('='.repeat(70) + '\n');
+}
+
 async function bootstrap() {
-  const app = await NestFactory.create(AppModule);
+  const app = await NestFactory.create(AppModule, {
+    logger: ['error', 'warn', 'log'],
+  });
   
   // 全局启用校验管道（核心配置）
   app.useGlobalPipes(