fix: 多实例默认选中SEQUENTIAL_APPROVE

Author: LesanOuO

src/components/bpmnProcessDesigner/package/penal/multi-instance/ElementMultiInstance.vue

@@ -301,13 +301,20 @@ const approveMethod = ref()
 const approveRatio = ref(100)
 const otherExtensions = ref()
 const getElementLoopNew = () => {
-  const extensionElements = bpmnElement.value.businessObject?.extensionElements ?? bpmnInstances().moddle.create('bpmn:ExtensionElements', { values: [] })
+  const extensionElements =
+    bpmnElement.value.businessObject?.extensionElements ??
+    bpmnInstances().moddle.create('bpmn:ExtensionElements', { values: [] })
   approveMethod.value = extensionElements.values.filter(
     (ex) => ex.$type === `${prefix}:ApproveMethod`
   )?.[0]?.value
 
   otherExtensions.value =
     extensionElements.values.filter((ex) => ex.$type !== `${prefix}:ApproveMethod`) ?? []
+
+  if (!approveMethod.value) {
+    approveMethod.value = ApproveMethodType.SEQUENTIAL_APPROVE
+    updateLoopCharacteristics()
+  }
 }
 const onApproveMethodChange = () => {
   approveRatio.value = 100