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-namespace/index.d.ts

@@ -0,0 +1,28 @@
+import * as _$vue from "vue";
+import { InjectionKey, Ref } from "vue";
+
+//#region ../../packages/hooks/use-namespace/index.d.ts
+declare const defaultNamespace = "el";
+declare const namespaceContextKey: InjectionKey<Ref<string | undefined>>;
+declare const useGetDerivedNamespace: (namespaceOverrides?: Ref<string | undefined>) => _$vue.ComputedRef<string>;
+declare const useNamespace: (block: string, namespaceOverrides?: Ref<string | undefined>) => {
+  namespace: _$vue.ComputedRef<string>;
+  b: (blockSuffix?: string) => string;
+  e: (element?: string) => string;
+  m: (modifier?: string) => string;
+  be: (blockSuffix?: string, element?: string) => string;
+  em: (element?: string, modifier?: string) => string;
+  bm: (blockSuffix?: string, modifier?: string) => string;
+  bem: (blockSuffix?: string, element?: string, modifier?: string) => string;
+  is: {
+    (name: string, state: boolean | undefined): string;
+    (name: string): string;
+  };
+  cssVar: (object: Record<string, string>) => Record<string, string>;
+  cssVarName: (name: string) => string;
+  cssVarBlock: (object: Record<string, string>) => Record<string, string>;
+  cssVarBlockName: (name: string) => string;
+};
+type UseNamespaceReturn = ReturnType<typeof useNamespace>;
+//#endregion
+export { UseNamespaceReturn, defaultNamespace, namespaceContextKey, useGetDerivedNamespace, useNamespace };