fix(接口测试): 修复场景列表不显示高级搜索的缺陷

--bug=1026579 --user=王孝刚 【接口测试】接口自动化-点击一下场景列表-高级搜索文字不显示
https://www.tapd.cn/55049933/s/1376803

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

@@ -312,7 +312,7 @@ export default {
     addTab(tab) {
       this.trashEnable = tab.name === 'trash';
       if (tab.name === 'default') {
-        this.$refs.apiScenarioList.condition = {};
+        this.$refs.apiScenarioList.condition.combine = {};
         this.trashEnable = false;
         this.$refs.nodeTree.list(this.projectId);
       } else if (tab.name === 'trash') {