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/echarts/lib/chart/lines/linesVisual.js

@@ -0,0 +1,74 @@
+
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+
+
+/**
+ * AUTO-GENERATED FILE. DO NOT MODIFY.
+ */
+
+/*
+* Licensed to the Apache Software Foundation (ASF) under one
+* or more contributor license agreements.  See the NOTICE file
+* distributed with this work for additional information
+* regarding copyright ownership.  The ASF licenses this file
+* to you under the Apache License, Version 2.0 (the
+* "License"); you may not use this file except in compliance
+* with the License.  You may obtain a copy of the License at
+*
+*   http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing,
+* software distributed under the License is distributed on an
+* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+* KIND, either express or implied.  See the License for the
+* specific language governing permissions and limitations
+* under the License.
+*/
+function normalize(a) {
+  if (!(a instanceof Array)) {
+    a = [a, a];
+  }
+  return a;
+}
+var linesVisual = {
+  seriesType: 'lines',
+  reset: function (seriesModel) {
+    var symbolType = normalize(seriesModel.get('symbol'));
+    var symbolSize = normalize(seriesModel.get('symbolSize'));
+    var data = seriesModel.getData();
+    data.setVisual('fromSymbol', symbolType && symbolType[0]);
+    data.setVisual('toSymbol', symbolType && symbolType[1]);
+    data.setVisual('fromSymbolSize', symbolSize && symbolSize[0]);
+    data.setVisual('toSymbolSize', symbolSize && symbolSize[1]);
+    function dataEach(data, idx) {
+      var itemModel = data.getItemModel(idx);
+      var symbolType = normalize(itemModel.getShallow('symbol', true));
+      var symbolSize = normalize(itemModel.getShallow('symbolSize', true));
+      symbolType[0] && data.setItemVisual(idx, 'fromSymbol', symbolType[0]);
+      symbolType[1] && data.setItemVisual(idx, 'toSymbol', symbolType[1]);
+      symbolSize[0] && data.setItemVisual(idx, 'fromSymbolSize', symbolSize[0]);
+      symbolSize[1] && data.setItemVisual(idx, 'toSymbolSize', symbolSize[1]);
+    }
+    return {
+      dataEach: data.hasItemOption ? dataEach : null
+    };
+  }
+};
+export default linesVisual;