I added a mark as read button to the posts but now patiently waiting till the WebSockets -> REST API transition is complete so it can get merged.
The front end needs a lot of work… Every bit is appreciated and the maintainers are pretty fast at reviewing and providing feedback which is nice to see.
It opens the item (post, comment) in the instance that it was created on. For example I’m on https://sh.itjust.works so if I click on that button of your post it opens this post on https://lemmy.world, which is your instance.