this is the most cute, beautiful shit i've seen all year. i love the fact that there are other players everywhere, since it's so convenient to dive into it via browser.
I don't have much clue about integration of such features as well unfortunately. Another thing I just realized though is, when you press CTRL+Z it will always open the "Recently Viewed" tab, I think that hotkey combination gotta be changed :D
this is really really well designed in comparison to apps like obsidian, since the standard design is actually very readable and actually makes you want to write stuff. i think this could replace my current zettler setup in writing papers when you could map hotkeys to most stuff, and it would have a zotero integration in some way. lovely project!