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/vue-demi/lib/v2/index.d.ts

@@ -0,0 +1,33 @@
+import Vue from 'vue'
+import type { PluginFunction, PluginObject } from 'vue'
+declare const isVue2: boolean
+declare const isVue3: boolean
+declare const Vue2: typeof Vue | undefined
+declare const version: string
+declare const install: (vue?: typeof Vue) => void
+/**
+ * @deprecated To avoid bringing in all the tree-shakable modules, this API has been deprecated. Use `Vue2` or named exports instead.
+ * Refer to https://github.com/vueuse/vue-demi/issues/41
+ */
+declare const V: typeof Vue
+
+/**
+ * DebuggerEvent is a Vue 3 development only feature. This type cannot exist in Vue 2.
+ */
+export declare type DebuggerEvent = never
+
+// accept no generic because Vue 3 doesn't accept any
+// https://github.com/vuejs/vue-next/pull/2758/
+export declare type Plugin = PluginObject<any> | PluginFunction<any>
+export type { VNode } from 'vue'
+export * from '@vue/composition-api'
+export {
+  V as Vue,
+  Vue2,
+  isVue2,
+  isVue3,
+  version,
+  install,
+}
+
+export declare function hasInjectionContext(): boolean