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/Renderer/PickId.js

@@ -0,0 +1,44 @@
+// @ts-check
+
+/** @import Color from "../Core/Color.js"; */
+/** @import {Destroyable} from "../Core/globalTypes.js"; */
+
+/**
+ * Represents a pickable object with a unique integer ID and picking color.
+ *
+ * @implements {Destroyable}
+ * @ignore
+ */
+class PickId {
+  /**
+   * @param {Map<number, object>} pickObjects
+   * @param {number} key
+   * @param {Color} color
+   */
+  constructor(pickObjects, key, color) {
+    this._pickObjects = pickObjects;
+
+    /** @type {number} */
+    this.key = key;
+
+    /** @type {Color} */
+    this.color = color;
+  }
+
+  /** @type {object} */
+  get object() {
+    return this._pickObjects.get(this.key);
+  }
+
+  set object(value) {
+    this._pickObjects.set(this.key, value);
+  }
+
+  /** @returns {void} */
+  destroy() {
+    this._pickObjects.delete(this.key);
+    return undefined;
+  }
+}
+
+export default PickId;