TIL you can navigate complex interfaces from within a Messages notification. I expanded this one, long-pressed on an email address sent, and was able to tap and swipe through the UI for adding the address to a contact in the tiny viewport. What if I chose to add a new one? Mini keyboard!?

Smartphone screen displays contact options for a phone number, offering actions like creating a new contact or adding to an existing one. Background shows a blurred purple image of another smartphone.