fix(接口测试): 修复接口定义上传文件，实际查看没有文件的缺陷

--bug=1033861 --user=王孝刚 【接口定义】上传文件，不填名称，提示保存成功，实际查看没文件
https://www.tapd.cn/55049933/s/1447921

api-test/frontend/src/business/definition/components/ApiVariable.vue

@@ -557,7 +557,7 @@ export default {
       if (!this.parameters[this.parameters.length - 1].min) {
         this.$set(this.parameters[this.parameters.length - 1], 'min', 0);
       }
-      if (!this.parameters[this.parameters.length - 1].value) {
+      if (!this.parameters[this.parameters.length - 1].value && this.parameters[this.parameters.length - 1].type !== 'file') {
         this.$set(this.parameters[this.parameters.length - 1], 'value', null);
       }
       if (!this.parameters[this.parameters.length - 1].uuid) {
@@ -566,7 +566,6 @@ export default {
       if (!this.parameters[this.parameters.length - 1].description) {
         this.$set(this.parameters[this.parameters.length - 1], 'description', null);
       }
-      this.$set(this.parameters[this.parameters.length - 1], 'files', null);
     }
     let savedApiParamsShowFields = getShowFields(this.storageKey);
     if (savedApiParamsShowFields) {

framework/sdk-parent/frontend/src/components/environment/ApiEnvironmentConfig.vue

@@ -299,7 +299,6 @@ export default {
         this.visible = false;
       }
       this.$refs.environmentEdit.clearValidate();
-      this.currentEnvironment = null;
       removeGoBackListener(this.close);
       this.isCopy = false;
     },

framework/sdk-parent/frontend/src/components/environment/commons/ApiScenarioVariables.vue

@@ -123,7 +123,7 @@
           <template slot-scope="scope">
             <el-select
               v-model="scope.row.type"
-              v-if="!scope.row.scope || scope.row.scope == 'api'"
+              v-if="scope.row.scope == 'api'"
               :placeholder="$t('commons.please_select')"
               size="mini"
               @change="changeType($event, scope.row)"
@@ -141,6 +141,7 @@
               v-model="scope.row.type"
               :placeholder="$t('commons.please_select')"
               size="mini"
+              @change="changeUiType($event, scope.row)"
             >
               <el-option
                 v-for="item in uiTypeSelectOptions"
@@ -462,6 +463,15 @@ export default {
         }
       });
     },
+    changeUiType(value, data) {
+      data.value = ''
+      this.items.forEach((item) => {
+        if (item.id === data.id) {
+          item.type = value;
+          item.value = data.value;
+        }
+      });
+    },
     changeVariableVal(row) {
       this.items.forEach((item) => {
         if (item.id === row.id) {