fix(接口测试): 修复场景变量添加csv未上传文件不提示的缺陷 (#16659)

--bug=1015662 --user=王孝刚
【接口测试】github#16644，场景变量csv只添加变量名，未添加csv文件，场景内接口不执行，生成报告也无步骤数，场景数
https://www.tapd.cn/55049933/s/1218845

Co-authored-by: wxg0103 <727495428@qq.com>

frontend/src/business/components/api/automation/scenario/variable/VariableList.vue

@@ -359,6 +359,8 @@ export default {
       });
       this.selectVariable = "";
       this.searchType = "";
+      this.selectType = "CONSTANT";
+      this.editData = {};
       if (jsondiffpatch.diff(JSON.parse(JSON.stringify(this.variables)), this.variablesOld) || jsondiffpatch.diff(JSON.parse(JSON.stringify(this.headers)), this.headersOld)) {
         this.$emit('setVariables', saveVariables, this.headers);
       }
@@ -374,9 +376,15 @@ export default {
     },
     confirmVariable() {
       if (this.editData && (this.editData.name == undefined || this.editData.name == '')) {
-        this.$warning("变量名不能为空");
+        this.$warning(this.$t('api_test.automation.variable_warning'));
         return;
       }
+      if (this.editData.type === 'CSV' && this.$refs.csv) {
+        if (this.editData.files.length === 0) {
+          this.$warning(this.$t('api_test.automation.csv_warning'));
+          return;
+        }
+      }
       // 更新场景，修改左边数据
       if (this.showDelete) {
         this.updateParameters(this.editData);

frontend/src/i18n/en-US.js

@@ -1468,7 +1468,9 @@ export default {
       generate_report: "Generate report",
       rerun: "fail and rerun",
       rerun_warning: "The connection is abnormal, please check the environment configuration",
-      rerun_success: "Rerun has already started, refresh the results later to view"
+      rerun_success: "Rerun has already started, refresh the results later to view",
+      csv_warning: "Please add csv file",
+      variable_warning: "Variable name cannot be empty"
     },
     environment: {
       id: 'Environment ID',

frontend/src/i18n/zh-CN.js

@@ -1476,7 +1476,9 @@ export default {
       generate_report: "生成报告",
       rerun: "失败重跑",
       rerun_warning: "连接异常，请检查环境配置",
-      rerun_success: "已经开始重跑，稍后刷新结果查看"
+      rerun_success: "已经开始重跑，稍后刷新结果查看",
+      csv_warning: "请添加 csv 文件",
+      variable_warning: "变量名不能为空"
     },
     environment: {
       id: '环境ID',

frontend/src/i18n/zh-TW.js

@@ -1473,7 +1473,9 @@ export default {
       generate_report: "生成報告",
       rerun: "失敗重跑",
       rerun_warning: "連接異常，請檢查環境配置",
-      rerun_success: "已經開始重跑，稍後重繪結果查看"
+      rerun_success: "已經開始重跑，稍後重繪結果查看",
+      csv_warning: "請添加 csv 文件",
+      variable_warning: "變量名不能為空"
     },
     environment: {
       id: '環境ID',