fix(notifications): mark all notifications as read in ui directly when marking as read on the server

This caused the notifications to stay on "unread" when marking them as read, making an unpleasant user experience

src/components/notifications/notifications.vue

@@ -156,6 +156,8 @@ async function markAllRead() {
 	const notificationService = new NotificationService()
 	await notificationService.markAllRead()
 	success({message: t('notification.markAllReadSuccess')})
+	
+	notifications.value.forEach(n => n.readAt = new Date())
 }
 </script>