Hi,
Is there a possibility to access and edit the library remotely via the web? It’s a pain to edit the library using only the remote. I know, I could use a keyboard connected to the Pi, but it would be way easier to edit using my laptop via some kind of a web interface.
Not 100% sure what you mean editing the Library, because even with a keyboard attached to the Pi library editing is limited. Or if that is the case you look for than instead of Keyboard attached to Pi you could use VNC Server/Client.
But I guess you are looking for ways to manage your library, check out these threads:
http://kodi.wiki/view/Library_managers