[Feature] Mobile Event notifications for shared album activity

I have searched the existing feature requests, both open and closed, to make sure this is not a duplicate request. • Yes The feature A small notification icon, similar to the one in the web frontend, would be a useful addition to the mobile app to inform users about new activity. Notifications could include, for example: • being mentioned in a shared album • new uploads to a shared album • likes and comments on a picture Somewhat related but they: • (one of the first mentions) • ( Big picture) • (Full FR but allegedely duplicate of 13878) My use case: I share photos with multiple users through shared albums, especially for group activities. Some people upload their photos immediately, while others may add them days later. It would be useful to have a simple way in the mobile app to see whether someone has added new assets to a shared album since I last checked it just like in the Web version. As a first iteration, I think…