fix:CN-1546 知识库导入空csv，接口报错界面未提示

src/views/setting/KnowledgeBaseForm.vue

@@ -570,8 +570,8 @@ export default {
       return originalImportedData
     },
     uploadSuccess (response) {
+      if (response.code === 200) {
         this.uploaded = true
-      // if (response.code === 200) {
         // 上传成功后去掉upload和preview的错误提示
         this.uploadErrorTip = ''
         this.previewErrorTip = ''
@@ -606,10 +606,10 @@ export default {
         this.isPreviewChange = true
         this.stepHeights[2] = itemListHeight.hasData
         this.stepHeightConstant.third = itemListHeight.hasData
-      /* } else {
+      } else {
         this.uploadLoading = false
         this.$message.error(this.$t('tip.uploadFailed', { msg: response.message }))
-      } */
+      }
     },
     onRemove (files) {
       if (files && files.status === 'success') {