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/zrender/lib/graphic/TSpan.d.ts

@@ -0,0 +1,31 @@
+import Displayable, { DisplayableProps, DisplayableStatePropNames } from './Displayable';
+import BoundingRect from '../core/BoundingRect';
+import { PathStyleProps } from './Path';
+import { FontStyle, FontWeight } from '../core/types';
+export interface TSpanStyleProps extends PathStyleProps {
+    x?: number;
+    y?: number;
+    text?: string;
+    font?: string;
+    fontSize?: number;
+    fontWeight?: FontWeight;
+    fontStyle?: FontStyle;
+    fontFamily?: string;
+    textAlign?: CanvasTextAlign;
+    textBaseline?: CanvasTextBaseline;
+}
+export declare const DEFAULT_TSPAN_STYLE: TSpanStyleProps;
+export interface TSpanProps extends DisplayableProps {
+    style?: TSpanStyleProps;
+}
+export declare type TSpanState = Pick<TSpanProps, DisplayableStatePropNames>;
+declare class TSpan extends Displayable<TSpanProps> {
+    style: TSpanStyleProps;
+    hasStroke(): boolean;
+    hasFill(): boolean;
+    createStyle(obj?: TSpanStyleProps): TSpanStyleProps;
+    setBoundingRect(rect: BoundingRect): void;
+    getBoundingRect(): BoundingRect;
+    protected static initDefaultProps: void;
+}
+export default TSpan;