When does the user see this screen? On log in?
What does “mints” do?
A seems more useful , as user does not have to hunt for history in another view. I believe this is expected for any modern fintech app.
What does the QR logo do?
Discussion
Yes, it is the first screen (after Optional PIN)
"Mints" shows a list of Lightning nodes you are trusting in exchange for Ecash.
"QR" lets you scan LN invoices or Ecash using your camera.
How often is “mints” used? Is it a one time set it and forget it?
It is not a one time and forget. It can be used anytime. Every mint has a dedicated options screen that looks like this:
This area is largely unexplored: how users actually use eCash and how frequently they interact with mint settings. As we gain more insight and these systems become more popular, we'll update our design accordingly.