feat: migrate from Element Plus to Ant Design Vue and update Vite configuration for better dependency management

- Updated Vite configuration to manually chunk Ant Design Vue for improved dependency management.
- Added a comprehensive migration testing checklist for transitioning from Element Plus 2.13.0 to Ant Design Vue 4.x, covering various components and functionalities.

.env.example

@@ -9,6 +9,9 @@
 # CORS 允许的前端域名（逗号分隔，生产环境必须修改）
 CORS_ORIGINS=http://localhost:3000
 
+# 前端 URL 配置（用于邮件中的链接）
+FRONTEND_URL=http://localhost:3000
+
 # 日志级别（可选：DEBUG, INFO, WARNING, ERROR）
 LOG_LEVEL=INFO