feat: 实现邮箱验证注册功能

添加完整的邮箱验证注册系统,包括验证码发送、验证和限流控制:
  - 新增邮箱验证服务模块(email_sender, email_template, email_verification)
  - 更新认证API支持邮箱验证注册流程
  - 添加注册对话框和验证码输入组件
  - 完善IP限流器支持邮箱验证场景
  - 修复前端类型定义问题,升级esbuild依赖

  🤖 Generated with [Claude Code](https://claude.com/claude-code)

  Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

frontend/src/api/admin.ts

@@ -386,5 +386,14 @@ export const adminApi = {
       { provider_id: providerId, api_key_id: apiKeyId }
     )
     return response.data
+  },
+
+  // 测试 SMTP 连接，支持传入未保存的配置
+  async testSmtpConnection(config: Record<string, any> = {}): Promise<{ success: boolean; message: string }> {
+    const response = await apiClient.post<{ success: boolean; message: string }>(
+      '/api/admin/system/smtp/test',
+      config
+    )
+    return response.data
   }
 }

frontend/src/api/auth.ts

@@ -31,6 +31,45 @@ export interface UserStats {
   [key: string]: unknown // 允许扩展其他统计数据
 }
 
+export interface SendVerificationCodeRequest {
+  email: string
+}
+
+export interface SendVerificationCodeResponse {
+  message: string
+  success: boolean
+  expire_minutes?: number
+}
+
+export interface VerifyEmailRequest {
+  email: string
+  code: string
+}
+
+export interface VerifyEmailResponse {
+  message: string
+  success: boolean
+}
+
+export interface RegisterRequest {
+  email: string
+  username: string
+  password: string
+}
+
+export interface RegisterResponse {
+  user_id: string
+  email: string
+  username: string
+  message: string
+}
+
+export interface RegistrationSettingsResponse {
+  enable_registration: boolean
+  require_email_verification: boolean
+  verification_code_expire_minutes?: number
+}
+
 export interface User {
   id: string // UUID
   username: string
@@ -87,5 +126,33 @@ export const authApi = {
       localStorage.setItem('refresh_token', response.data.refresh_token)
     }
     return response.data
+  },
+
+  async sendVerificationCode(email: string): Promise<SendVerificationCodeResponse> {
+    const response = await apiClient.post<SendVerificationCodeResponse>(
+      '/api/auth/send-verification-code',
+      { email }
+    )
+    return response.data
+  },
+
+  async verifyEmail(email: string, code: string): Promise<VerifyEmailResponse> {
+    const response = await apiClient.post<VerifyEmailResponse>(
+      '/api/auth/verify-email',
+      { email, code }
+    )
+    return response.data
+  },
+
+  async register(data: RegisterRequest): Promise<RegisterResponse> {
+    const response = await apiClient.post<RegisterResponse>('/api/auth/register', data)
+    return response.data
+  },
+
+  async getRegistrationSettings(): Promise<RegistrationSettingsResponse> {
+    const response = await apiClient.get<RegistrationSettingsResponse>(
+      '/api/auth/registration-settings'
+    )
+    return response.data
   }
 }