I quite like this, particularly that the filter is just a preset! Will be back.

Minor UI feedback - when navigating comments (and maybe other stuff) with the keyboard, the actual focus change is blocked behind some automated scroll behavior, and the effect is that someone quickly hitting keybinds will collapse the wrong thread. Would suggest making the focus change happen concurrently.

Thanks for the feedback. Comment drawer nav could be a lot better. I started working on the keyboard nav but got distracted with other things. I'll fix it.