• Works with any site template. Members manage 2FA on a new User CP → Two-factor page; the Settings page links to it. No template files are patched, and updating puts the four DefaultRevamp files earlier versions changed back to stock.
• Sign in with a passkey shows whenever passkeys are on, and its button matches your template.
• Adding a passkey happens in a dialog, and the passkey prompt opens straight away on iPhone and iPad.
• Fixed: Cancel on the authenticator setup page reported an invalid code. It now cancels, and a new app key is only saved once a code from it is confirmed.
• No browser pop-ups: questions and errors appear on the page, and StaffCP asks in its own dialog.
• Templates that place their own passkey button keep it.

Updating: extract over the old files, then click Apply patches in StaffCP → 2FA → Patches.