fix: 修复代码生成器前端新增数据模板错误

continew-admin-plugins/continew-admin-generator/src/main/resources/templates/frontend/AddModal.ftl

@@ -45,7 +45,7 @@ const options: Options = {
   btns: { hide: true }
 }
 
-const columns: Columns = [
+const columns: Columns = reactive([
 <#list fieldConfigs as fieldConfig>
   <#if fieldConfig.showInForm>
   {
@@ -84,7 +84,7 @@ const columns: Columns = [
   },
   </#if>
 </#list>
-]
+])
 
 const { form, resetForm } = useForm({
     // todo 待补充