prevent a ReferenceError

before, we got:

> ReferenceError: can't access lexical declaration 'followRequestDone'
> before initialization

(of course in non-dev mode, `followRequestDone` had a different name)

packages/frontend/src/components/MkNotification.vue

@@ -210,6 +210,8 @@ const props = withDefaults(defineProps<{
 
 const userDetailed: Ref<UserDetailed | null> = ref(null);
 
+const followRequestDone = ref(true);
+
 // watch() is required because computed() doesn't support async.
 watch(props, async () => {
 	const type = props.notification.type;
@@ -242,8 +244,6 @@ const exportEntityName = {
 	userList: i18n.ts.lists,
 } as const satisfies Record<ExportCompletedNotification['exportedEntity'], string>;
 
-const followRequestDone = ref(true);
-
 const acceptFollowRequest = () => {
 	if (!('user' in props.notification)) return;
 	followRequestDone.value = true;