fix(接口测试): 修复场景回收站切换到列表，模块树未刷新的缺陷

--bug=1027569 --user=王孝刚 【接口测试】场景回收站切到到场景列表-模块树未更新
https://www.tapd.cn/55049933/s/1390754

api-test/frontend/src/business/automation/ApiAutomation.vue

@@ -313,10 +313,13 @@ export default {
     addTab(tab) {
       this.trashEnable = tab.name === 'trash';
       if (tab.name === 'default') {
-        this.$refs.apiScenarioList.condition.combine = {};
         this.trashEnable = false;
-        this.$refs.nodeTree.list(this.projectId);
-        this.$refs.apiScenarioList.search(this.projectId);
+        if(this.$refs.apiScenarioList){
+          if (this.$refs.apiScenarioList.condition && this.$refs.apiScenarioList.condition.combine) {
+            this.$refs.apiScenarioList.condition.combine = {};
+          }
+          this.$refs.apiScenarioList.search(this.projectId);
+        }
       } else if (tab.name === 'trash') {
         this.trashEnable = true;
         this.$refs.apiTrashScenarioList.search();