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/geo/crs/CRS.Earth.js

@@ -0,0 +1,33 @@
+import {CRS} from './CRS';
+import * as Util from '../../core/Util';
+
+/*
+ * @namespace CRS
+ * @crs L.CRS.Earth
+ *
+ * Serves as the base for CRS that are global such that they cover the earth.
+ * Can only be used as the base for other CRS and cannot be used directly,
+ * since it does not have a `code`, `projection` or `transformation`. `distance()` returns
+ * meters.
+ */
+
+export var Earth = Util.extend({}, CRS, {
+	wrapLng: [-180, 180],
+
+	// Mean Earth Radius, as recommended for use by
+	// the International Union of Geodesy and Geophysics,
+	// see https://rosettacode.org/wiki/Haversine_formula
+	R: 6371000,
+
+	// distance between two geographical points using spherical law of cosines approximation
+	distance: function (latlng1, latlng2) {
+		var rad = Math.PI / 180,
+		    lat1 = latlng1.lat * rad,
+		    lat2 = latlng2.lat * rad,
+		    sinDLat = Math.sin((latlng2.lat - latlng1.lat) * rad / 2),
+		    sinDLon = Math.sin((latlng2.lng - latlng1.lng) * rad / 2),
+		    a = sinDLat * sinDLat + Math.cos(lat1) * Math.cos(lat2) * sinDLon * sinDLon,
+		    c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
+		return this.R * c;
+	}
+});