feat: 数据备份管理系统 v0.1.0

带 Web 操作界面的备份系统，支持：
- 数据源：MySQL 数据库（mysqldump）、服务器目录（tar.gz）
- 存储目标：本地目录、S3 兼容对象存储（MinIO/Ceph/AWS S3）
- 触发方式：手动 + Cron 定时调度（APScheduler）
- 备份还原：MySQL 库、目录
- JWT 登录认证 + Fernet 字段加密
- 保留策略：按数量 + 按天数双重清理

技术栈：FastAPI + SQLAlchemy 2 + APScheduler + aioboto3；
前端 Vite + React 18 + TypeScript + Ant Design 5 + Zustand。
Docker Compose 一键起。

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

frontend/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "backup-system-frontend",
+  "private": true,
+  "version": "0.1.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "tsc -b && vite build",
+    "preview": "vite preview",
+    "lint": "eslint . --ext ts,tsx --report-unused-disable-directives --max-warnings 0"
+  },
+  "dependencies": {
+    "antd": "^5.21.0",
+    "@ant-design/icons": "^5.5.1",
+    "axios": "^1.7.7",
+    "dayjs": "^1.11.13",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1",
+    "react-router-dom": "^6.26.2",
+    "zustand": "^4.5.5"
+  },
+  "devDependencies": {
+    "@types/react": "^18.3.5",
+    "@types/react-dom": "^18.3.0",
+    "@vitejs/plugin-react": "^4.3.1",
+    "typescript": "^5.5.4",
+    "vite": "^5.4.6"
+  }
+}