A working WebAuthn sample
No passwords. Just scan.
Create a passkey on your phone and use it to sign in from another screen. The private key never leaves your authenticator.
01 · Start
Enter an account name on the desktop to create a short-lived session.
02 · Scan
Open the one-time QR link on a phone over the same secure origin.
03 · Verify
WebAuthn signs a server challenge and the desktop receives the result.