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/BufferUsage.js

@@ -0,0 +1,32 @@
+// @ts-check
+
+import WebGLConstants from "../Core/WebGLConstants.js";
+
+/**
+ * @private
+ * @enum {number}
+ */
+const BufferUsage = {
+  STREAM_DRAW: WebGLConstants.STREAM_DRAW,
+  STATIC_DRAW: WebGLConstants.STATIC_DRAW,
+  DYNAMIC_DRAW: WebGLConstants.DYNAMIC_DRAW,
+  DYNAMIC_READ: WebGLConstants.DYNAMIC_READ,
+};
+
+/**
+ * @private
+ * @param {BufferUsage} bufferUsage
+ */
+// @ts-expect-error https://github.com/CesiumGS/cesium/issues/13420
+BufferUsage.validate = function (bufferUsage) {
+  return (
+    bufferUsage === BufferUsage.STREAM_DRAW ||
+    bufferUsage === BufferUsage.STATIC_DRAW ||
+    bufferUsage === BufferUsage.DYNAMIC_DRAW ||
+    bufferUsage === BufferUsage.DYNAMIC_READ
+  );
+};
+
+Object.freeze(BufferUsage);
+
+export default BufferUsage;