feat: local album events notification (#22817)

* feat: local album events notification

* pr feedback

* show number of unread notification

server/src/enum.ts

@@ -722,6 +722,8 @@ export enum NotificationType {
   JobFailed = 'JobFailed',
   BackupFailed = 'BackupFailed',
   SystemMessage = 'SystemMessage',
+  AlbumInvite = 'AlbumInvite',
+  AlbumUpdate = 'AlbumUpdate',
   Custom = 'Custom',
 }