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/DataSources/Visualizer.js

@@ -0,0 +1,61 @@
+import DeveloperError from "../Core/DeveloperError.js";
+
+/**
+ * Defines the interface for visualizers. Visualizers are plug-ins to
+ * {@link DataSourceDisplay} that render data associated with
+ * {@link DataSource} instances.
+ * This object is an interface for documentation purposes and is not intended
+ * to be instantiated directly.
+ * @alias Visualizer
+ * @constructor
+ *
+ * @see BillboardVisualizer
+ * @see LabelVisualizer
+ * @see ModelVisualizer
+ * @see PathVisualizer
+ * @see PointVisualizer
+ * @see GeometryVisualizer
+ */
+function Visualizer() {
+  DeveloperError.throwInstantiationError();
+}
+
+/**
+ * Updates the visualization to the provided time.
+ * @function
+ *
+ * @param {JulianDate} time The time.
+ *
+ * @returns {boolean} True if the display was updated to the provided time,
+ * false if the visualizer is waiting for an asynchronous operation to
+ * complete before data can be updated.
+ */
+Visualizer.prototype.update = DeveloperError.throwInstantiationError;
+
+/**
+ * Computes a bounding sphere which encloses the visualization produced for the specified entity.
+ * The bounding sphere is in the fixed frame of the scene's globe.
+ *
+ * @param {Entity} entity The entity whose bounding sphere to compute.
+ * @param {BoundingSphere} result The bounding sphere onto which to store the result.
+ * @returns {BoundingSphereState} BoundingSphereState.DONE if the result contains the bounding sphere,
+ *                       BoundingSphereState.PENDING if the result is still being computed, or
+ *                       BoundingSphereState.FAILED if the entity has no visualization in the current scene.
+ * @private
+ */
+Visualizer.prototype.getBoundingSphere = DeveloperError.throwInstantiationError;
+
+/**
+ * Returns true if this object was destroyed; otherwise, false.
+ * @function
+ *
+ * @returns {boolean} True if this object was destroyed; otherwise, false.
+ */
+Visualizer.prototype.isDestroyed = DeveloperError.throwInstantiationError;
+
+/**
+ * Removes all visualization and cleans up any resources associated with this instance.
+ * @function
+ */
+Visualizer.prototype.destroy = DeveloperError.throwInstantiationError;
+export default Visualizer;