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/v2.7/index.mjs

@@ -0,0 +1,80 @@
+import Vue from 'vue'
+import { getCurrentInstance } from 'vue'
+
+var isVue2 = true
+var isVue3 = false
+var Vue2 = Vue
+var warn = Vue.util.warn
+
+function install() {}
+
+// createApp polyfill
+export function createApp(rootComponent, rootProps) {
+  var vm
+  var provide = {}
+  var app = {
+    config: Vue.config,
+    use: Vue.use.bind(Vue),
+    mixin: Vue.mixin.bind(Vue),
+    component: Vue.component.bind(Vue),
+    provide: function (key, value) {
+      provide[key] = value
+      return this
+    },
+    directive: function (name, dir) {
+      if (dir) {
+        Vue.directive(name, dir)
+        return app
+      } else {
+        return Vue.directive(name)
+      }
+    },
+    mount: function (el, hydrating) {
+      if (!vm) {
+        vm = new Vue(Object.assign({ propsData: rootProps }, rootComponent, { provide: Object.assign(provide, rootComponent.provide) }))
+        vm.$mount(el, hydrating)
+        return vm
+      } else {
+        return vm
+      }
+    },
+    unmount: function () {
+      if (vm) {
+        vm.$destroy()
+        vm = undefined
+      }
+    },
+  }
+  return app
+}
+
+export {
+  Vue,
+  Vue2,
+  isVue2,
+  isVue3,
+  install,
+  warn
+}
+
+// Vue 3 components mock
+function createMockComponent(name) {
+  return {
+    setup() {
+      throw new Error('[vue-demi] ' + name + ' is not supported in Vue 2. It\'s provided to avoid compiler errors.')
+    }
+  }
+}
+export var Fragment = /*#__PURE__*/ createMockComponent('Fragment')
+export var Transition = /*#__PURE__*/ createMockComponent('Transition')
+export var TransitionGroup = /*#__PURE__*/ createMockComponent('TransitionGroup')
+export var Teleport = /*#__PURE__*/ createMockComponent('Teleport')
+export var Suspense = /*#__PURE__*/ createMockComponent('Suspense')
+export var KeepAlive = /*#__PURE__*/ createMockComponent('KeepAlive')
+
+export * from 'vue'
+
+// Not implemented https://github.com/vuejs/core/pull/8111, falls back to getCurrentInstance()
+export function hasInjectionContext() {
+  return !!getCurrentInstance()
+}