解决ref未引入相关报错

src/components/XnWorkflow/nodes/common/previewCustomForm.vue

@@ -17,6 +17,7 @@
 <script setup name="previewCustomForm">
 	import { ElMessage } from 'element-plus'
 	import { loadComponent } from '../../customForm'
+	import { ref } from 'vue'
 	const visible = ref(false)
 	const confirmLoading = ref(false)
 	const customFormRef = ref()