fix: 修复校验错误提示逻辑

src/views/setting/KnowledgeBaseForm.vue

@@ -305,7 +305,7 @@ export default {
       this.blockOperation.save = true
       // 校验form + upload + preview
       this.$refs.form.validate(valid => {
-        if (valid) {
+        this.$refs.form.validateField('tagName')
         if (!this.uploaded) {
           this.uploadErrorTip = this.$t('validate.required')
         } else {
@@ -319,7 +319,7 @@ export default {
         } else {
           this.previewErrorTip = ''
         }
-
+        if (valid) {
           // 校验通过后组织数据、请求接口
           if (valid && !this.uploadErrorTip && !this.previewErrorTip) {
             const postData = {