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/delayed-stream/package.json

@@ -0,0 +1,27 @@
+{
+  "author": "Felix Geisendörfer <felix@debuggable.com> (http://debuggable.com/)",
+  "contributors": [
+    "Mike Atkins <apeherder@gmail.com>"
+  ],
+  "name": "delayed-stream",
+  "description": "Buffers events from a stream until you are ready to handle them.",
+  "license": "MIT",
+  "version": "1.0.0",
+  "homepage": "https://github.com/felixge/node-delayed-stream",
+  "repository": {
+    "type": "git",
+    "url": "git://github.com/felixge/node-delayed-stream.git"
+  },
+  "main": "./lib/delayed_stream",
+  "engines": {
+    "node": ">=0.4.0"
+  },
+  "scripts": {
+    "test": "make test"
+  },
+  "dependencies": {},
+  "devDependencies": {
+    "fake": "0.2.0",
+    "far": "0.0.1"
+  }
+}