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/@cesium/engine/Source/Scene/Light.js

@@ -0,0 +1,34 @@
+import DeveloperError from "../Core/DeveloperError.js";
+
+/**
+ * A light source. This type describes an interface and is not intended to be instantiated directly. Together, <code>color</code> and <code>intensity</code> produce a high-dynamic-range light color. <code>intensity</code> can also be used individually to dim or brighten the light without changing the hue.
+ *
+ * @alias Light
+ * @constructor
+ *
+ * @see DirectionalLight
+ * @see SunLight
+ */
+function Light() {}
+
+Object.defineProperties(Light.prototype, {
+  /**
+   * The color of the light.
+   * @memberof Light.prototype
+   * @type {Color}
+   */
+  color: {
+    get: DeveloperError.throwInstantiationError,
+  },
+
+  /**
+   * The intensity controls the strength of the light. <code>intensity</code> has a minimum value of 0.0 and no maximum value.
+   * @memberof Light.prototype
+   * @type {number}
+   */
+  intensity: {
+    get: DeveloperError.throwInstantiationError,
+  },
+});
+
+export default Light;