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/canvas/graphic.d.ts

@@ -0,0 +1,19 @@
+import Displayable from '../graphic/Displayable';
+import { ImagePatternObject } from '../graphic/Pattern';
+import Path from '../graphic/Path';
+export declare function createCanvasPattern(this: void, ctx: CanvasRenderingContext2D, pattern: ImagePatternObject, el: {
+    dirty: () => void;
+}): CanvasPattern;
+export declare type BrushScope = {
+    inHover: boolean;
+    viewWidth: number;
+    viewHeight: number;
+    prevElClipPaths?: Path[];
+    prevEl?: Displayable;
+    allClipped?: boolean;
+    batchFill?: string;
+    batchStroke?: string;
+    lastDrawType?: number;
+};
+export declare function brushSingle(ctx: CanvasRenderingContext2D, el: Displayable): void;
+export declare function brush(ctx: CanvasRenderingContext2D, el: Displayable, scope: BrushScope, isLast: boolean): void;