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/dayjs/esm/plugin/badMutable/index.d.ts

@@ -0,0 +1,4 @@
+import { PluginFunc } from 'dayjs/esm'
+
+declare const plugin: PluginFunc
+export = plugin

frontend/node_modules/dayjs/esm/plugin/badMutable/index.js

@@ -0,0 +1,61 @@
+export default (function (o, c) {
+  // locale needed later
+  var proto = c.prototype;
+
+  proto.$g = function (input, get, set) {
+    if (this.$utils().u(input)) return this[get];
+    return this.$set(set, input);
+  };
+
+  proto.set = function (string, _int) {
+    return this.$set(string, _int);
+  };
+
+  var oldStartOf = proto.startOf;
+
+  proto.startOf = function (units, startOf) {
+    this.$d = oldStartOf.bind(this)(units, startOf).toDate();
+    this.init();
+    return this;
+  };
+
+  var oldAdd = proto.add;
+
+  proto.add = function (number, units) {
+    this.$d = oldAdd.bind(this)(number, units).toDate();
+    this.init();
+    return this;
+  };
+
+  var oldLocale = proto.locale;
+
+  proto.locale = function (preset, object) {
+    if (!preset) return this.$L;
+    this.$L = oldLocale.bind(this)(preset, object).$L;
+    return this;
+  };
+
+  var oldDaysInMonth = proto.daysInMonth;
+
+  proto.daysInMonth = function () {
+    return oldDaysInMonth.bind(this.clone())();
+  };
+
+  var oldIsSame = proto.isSame;
+
+  proto.isSame = function (that, units) {
+    return oldIsSame.bind(this.clone())(that, units);
+  };
+
+  var oldIsBefore = proto.isBefore;
+
+  proto.isBefore = function (that, units) {
+    return oldIsBefore.bind(this.clone())(that, units);
+  };
+
+  var oldIsAfter = proto.isAfter;
+
+  proto.isAfter = function (that, units) {
+    return oldIsAfter.bind(this.clone())(that, units);
+  };
+});