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/es/utils/dom/style.d.ts

@@ -0,0 +1,13 @@
+import { CSSProperties } from "vue";
+
+//#region ../../packages/utils/dom/style.d.ts
+declare const classNameToArray: (cls?: string) => string[];
+declare const hasClass: (el: Element, cls: string) => boolean;
+declare const addClass: (el: Element, cls: string) => void;
+declare const removeClass: (el: Element, cls: string) => void;
+declare const getStyle: (element: HTMLElement, styleName: keyof CSSProperties) => string;
+declare const setStyle: (element: HTMLElement, styleName: CSSProperties | keyof CSSProperties, value?: string | number) => void;
+declare const removeStyle: (element: HTMLElement, style: CSSProperties | keyof CSSProperties) => void;
+declare function addUnit(value?: string | number, defaultUnit?: string): string | undefined;
+//#endregion
+export { addClass, addUnit, classNameToArray, getStyle, hasClass, removeClass, removeStyle, setStyle };