fix: el-dialog lock-scroll=false(弹窗打开后不锁定页面滚动)

frontend/src/views/KPIDetail.vue

@@ -173,7 +173,7 @@
     </el-card>
 
     <!-- 模拟推演对话框 -->
-    <el-dialog v-model="showSimulate" title="因果链模拟推演" :width="700" top="5vh">
+    <el-dialog v-model="showSimulate" title="因果链模拟推演" :width="700" top="5vh" :lock-scroll="false">
       <div v-if="simulateResult">
         <el-alert :title="'修改 ' + simulateResult.source.kpi_name + ' 从 ' + simulateResult.source.current_value + ' 到 ' + simulateResult.source.new_value + '（变化率 ' + simulateResult.source.change_pct + '%）'"
           type="info" show-icon :closable="false" style="margin-bottom:12px;" />
@@ -216,7 +216,7 @@
     </el-dialog>
 
     <!-- 全局因果网络图对话框 -->
-    <el-dialog v-model="showFullNetwork" title="全局因果网络图" :width="900" top="5vh">
+    <el-dialog v-model="showFullNetwork" title="全局因果网络图" :width="900" top="5vh" :lock-scroll="false">
       <div v-loading="fullNetworkLoading" style="height:550px;">
         <v-chart v-if="fullNetworkNodes.length > 0" :option="fullNetworkChartOption" autoresize style="height:550px;width:100%;" />
         <div v-else class="full-network-loading">加载中...</div>