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/leaflet/src/map/handler/Map.DoubleClickZoom.js

@@ -0,0 +1,55 @@
+import {Map} from '../Map';
+import {Handler} from '../../core/Handler';
+
+/*
+ * L.Handler.DoubleClickZoom is used to handle double-click zoom on the map, enabled by default.
+ */
+
+// @namespace Map
+// @section Interaction Options
+
+Map.mergeOptions({
+	// @option doubleClickZoom: Boolean|String = true
+	// Whether the map can be zoomed in by double clicking on it and
+	// zoomed out by double clicking while holding shift. If passed
+	// `'center'`, double-click zoom will zoom to the center of the
+	//  view regardless of where the mouse was.
+	doubleClickZoom: true
+});
+
+export var DoubleClickZoom = Handler.extend({
+	addHooks: function () {
+		this._map.on('dblclick', this._onDoubleClick, this);
+	},
+
+	removeHooks: function () {
+		this._map.off('dblclick', this._onDoubleClick, this);
+	},
+
+	_onDoubleClick: function (e) {
+		var map = this._map,
+		    oldZoom = map.getZoom(),
+		    delta = map.options.zoomDelta,
+		    zoom = e.originalEvent.shiftKey ? oldZoom - delta : oldZoom + delta;
+
+		if (map.options.doubleClickZoom === 'center') {
+			map.setZoom(zoom);
+		} else {
+			map.setZoomAround(e.containerPoint, zoom);
+		}
+	}
+});
+
+// @section Handlers
+//
+// Map properties include interaction handlers that allow you to control
+// interaction behavior in runtime, enabling or disabling certain features such
+// as dragging or touch zoom (see `Handler` methods). For example:
+//
+// ```js
+// map.doubleClickZoom.disable();
+// ```
+//
+// @property doubleClickZoom: Handler
+// Double click zoom handler.
+Map.addInitHook('addHandler', 'doubleClickZoom', DoubleClickZoom);