修复客服bug

src/views/aftersales/aftersalesWorkOrderAdd.vue

@@ -1622,7 +1622,7 @@ const ChangePackageInfo = (val, index) => {
           }
           // 车次号处理
           if(groundlineType.value == 3){
-            TrainnumberList.value=[]
+            
             res.data.data.forEach(item=>{
               item.trunklines.forEach(itemChid=>{
               TrainnumberList.value.push({label:itemChid.trainNumber,value:itemChid.trainNumber})//车次号