feat: 初始化智能电量监控系统项目

该提交完成了完整的电费监控系统项目初始化，包含：
1.  后端Node.js+Express服务，支持定时采集、登录认证、数据API
2.  React前端界面，包含登录页和数据仪表盘
3.  Docker容器化配置和docker-compose部署文件
4.  环境变量示例和gitignore、dockerignore配置
5.  完整的项目文档README

client/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "electricity-monitor-client",
+  "private": true,
+  "version": "1.0.0",
+  "type": "module",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "preview": "vite preview"
+  },
+  "dependencies": {
+    "@ant-design/icons": "^5.5.0",
+    "@icon-park/react": "^1.4.2",
+    "antd": "^5.22.0",
+    "chart.js": "^4.4.0",
+    "react": "^18.3.1",
+    "react-dom": "^18.3.1"
+  },
+  "devDependencies": {
+    "@types/react": "^18.3.12",
+    "@vitejs/plugin-react": "^4.3.4",
+    "vite": "^6.0.0"
+  }
+}