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/element-plus/lib/hooks/use-focus/index.d.ts

@@ -0,0 +1,10 @@
+import { Ref } from "vue";
+
+//#region ../../packages/hooks/use-focus/index.d.ts
+declare const useFocus: (el: Ref<{
+  focus: () => void;
+} | null>) => {
+  focus: () => void;
+};
+//#endregion
+export { useFocus };

frontend/node_modules/element-plus/lib/hooks/use-focus/index.js

@@ -0,0 +1,11 @@
+Object.defineProperty(exports, Symbol.toStringTag, { value: "Module" });
+//#region ../../packages/hooks/use-focus/index.ts
+const useFocus = (el) => {
+	return { focus: () => {
+		el.value?.focus?.();
+	} };
+};
+//#endregion
+exports.useFocus = useFocus;
+
+//# sourceMappingURL=index.js.map

frontend/node_modules/element-plus/lib/hooks/use-focus/index.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"index.js","names":[],"sources":["../../../../../packages/hooks/use-focus/index.ts"],"sourcesContent":["import type { Ref } from 'vue'\n\nexport const useFocus = (\n  el: Ref<{\n    focus: () => void\n  } | null>\n) => {\n  return {\n    focus: () => {\n      el.value?.focus?.()\n    },\n  }\n}\n"],"mappings":";;AAEA,MAAa,YACX,OAGG;CACH,OAAO,EACL,aAAa;EACX,GAAG,OAAO,SAAS;IAEtB"}