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/Source/Widgets/Cesium3DTilesInspector/Cesium3DTilesInspector.css

@@ -0,0 +1,122 @@
+ul.cesium-cesiumInspector-statistics {
+  margin: 0;
+  padding-top: 3px;
+  padding-bottom: 3px;
+}
+
+ul.cesium-cesiumInspector-statistics + ul.cesium-cesiumInspector-statistics {
+  border-top: 1px solid #aaa;
+}
+
+.cesium-cesiumInspector-slider {
+  margin-top: 5px;
+}
+
+.cesium-cesiumInspector-slider input[type="number"] {
+  text-align: left;
+  background-color: #222;
+  outline: none;
+  border: 1px solid #444;
+  color: #edffff;
+  width: 100px;
+  border-radius: 3px;
+  padding: 1px;
+  margin-left: 10px;
+  cursor: auto;
+}
+
+.cesium-cesiumInspector-slider input[type="number"]::-webkit-outer-spin-button,
+.cesium-cesiumInspector-slider input[type="number"]::-webkit-inner-spin-button {
+  -webkit-appearance: none;
+  margin: 0;
+}
+
+.cesium-cesiumInspector-slider input[type="range"] {
+  margin-left: 5px;
+  vertical-align: middle;
+}
+
+.cesium-cesiumInspector-hide .cesium-cesiumInspector-styleEditor {
+  display: none;
+}
+
+.cesium-cesiumInspector-styleEditor {
+  padding: 10px;
+  border-radius: 5px;
+  background: rgba(48, 51, 54, 0.8);
+  border: 1px solid #444;
+}
+
+.cesium-cesiumInspector-styleEditor textarea {
+  width: 100%;
+  height: 300px;
+  background: transparent;
+  color: #edffff;
+  border: none;
+  padding: 0;
+  white-space: pre;
+  overflow-wrap: normal;
+  overflow-x: auto;
+}
+
+.cesium-3DTilesInspector {
+  width: 300px;
+  pointer-events: all;
+}
+
+.cesium-3DTilesInspector-statistics {
+  font-size: 11px;
+}
+
+.cesium-3DTilesInspector-disabledElementsInfo {
+  margin: 5px 0 0 0;
+  padding: 0 0 0 20px;
+  color: #eed202;
+}
+
+.cesium-3DTilesInspector div,
+.cesium-3DTilesInspector input[type="range"] {
+  width: 100%;
+  box-sizing: border-box;
+}
+
+.cesium-cesiumInspector-error {
+  color: #ff9e9e;
+  overflow: auto;
+}
+
+.cesium-3DTilesInspector .cesium-cesiumInspector-section {
+  margin-top: 3px;
+}
+
+.cesium-3DTilesInspector
+  .cesium-cesiumInspector-sectionHeader
+  + .cesium-cesiumInspector-show {
+  border-top: 1px solid white;
+}
+
+input.cesium-cesiumInspector-url {
+  overflow: hidden;
+  white-space: nowrap;
+  overflow-x: scroll;
+  background-color: transparent;
+  color: white;
+  outline: none;
+  border: none;
+  height: 1em;
+  width: 100%;
+}
+
+.cesium-cesiumInspector .field-group {
+  display: table;
+}
+
+.cesium-cesiumInspector .field-group > label {
+  display: table-cell;
+  font-weight: bold;
+}
+
+.cesium-cesiumInspector .field-group > .field {
+  display: table-cell;
+  width: 100%;
+}