Require biometric or custom PIN when launching app
The Seed Tool is by far the best app of its kind on the market, thank you for building it!
After an unfortunate incident involving my son and some thieves who took his phone and demanded the passcode at gunpoint, I have come to realize just how powerful the iPhone passcode is. By default, the passcode can always substitute for biometrics, like for example if you long-press on an app icon and "Require FaceID", it doesn't actually, you know, require FaceID.
So, Claude and I set out to fix this (one prompt, about 10 minutes). This PR lets the user optionally require FaceID or a custom PIN code to open the app. I am not an iOS dev, and I am unsure how much actual security this adds, but it would certainly stop garden variety bad guys who have your phone and your passcode, at least for a while, perhaps long enough for you to remotely wipe the device.
Feel free to close if you are not interested, I totally understand, but perhaps others will find it useful as well.