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/Shaders/GroundAtmosphere.js

@@ -0,0 +1,20 @@
+//This file is automatically rebuilt by the Cesium build process.
+export default "void computeAtmosphereScattering(vec3 positionWC, vec3 lightDirection, out vec3 rayleighColor, out vec3 mieColor, out float opacity) {\n\
+\n\
+    vec3 cameraToPositionWC = positionWC - czm_viewerPositionWC;\n\
+    vec3 cameraToPositionWCDirection = normalize(cameraToPositionWC);\n\
+    czm_ray primaryRay = czm_ray(czm_viewerPositionWC, cameraToPositionWCDirection);\n\
+    \n\
+    float atmosphereInnerRadius = length(positionWC);\n\
+\n\
+    computeScattering(\n\
+        primaryRay,\n\
+        length(cameraToPositionWC),\n\
+        lightDirection,\n\
+        atmosphereInnerRadius,\n\
+        rayleighColor,\n\
+        mieColor,\n\
+        opacity\n\
+    );\n\
+}\n\
+";