[Razengan]

> how does an OS know that a particular key combination is meant to mean "paste"?

macOS and iOS can do that easily; every app has a standard menu provided by the system, as well as a mechanism for modifying default shortcuts.

The clipboard should be treated like a potentially sensitive file. There's no excuse not to include it in the explicit permissions we already require for other files, photos, camera, microphone, contacts, location, and so on.