feat: 实现供水运营专题大屏BI可视化

- 新增OperationDashboard.vue全屏大屏组件
- 添加6个核心KPI指标卡片: 进水总量/出水总量/产销差率/营收额/平均水质/报警次数
- 实现6个ECharts图表: 供水趋势/水质分布/报警统计/管网空间/设备状态/营收分析
- 创建静态HTML版本operation-dashboard.html，使用CDN加载Vue3/ECharts/Element Plus
- 更新路由配置，添加/operation路径支持
- 修复nextTick导入问题，优化build脚本

🚧 开发者: bot_dev1
📝 任务: #38 [BI] 运营仪表盘 + 供水专题大屏

frontend/node_modules/pinia/README.md

@@ -0,0 +1,24 @@
+<p align="center">
+  <a href="https://pinia.vuejs.org" target="_blank" rel="noopener noreferrer">
+    <img width="180" src="https://pinia.vuejs.org/logo.svg" alt="Pinia logo">
+  </a>
+</p>
+
+# Pinia
+
+> Intuitive, type safe and flexible Store for Vue
+
+## 👉 [Demo with Vue 3 on StackBlitz](https://stackblitz.com/github/piniajs/example-vue-3-vite)
+
+## Help me keep working on this project 💚
+
+- [Become a Sponsor on GitHub](https://github.com/sponsors/posva)
+- [One-time donation via PayPal](https://paypal.me/posva)
+
+## Documentation
+
+To learn more about Pinia, check [its documentation](https://pinia.vuejs.org).
+
+## License
+
+[MIT](http://opensource.org/licenses/MIT)