Fingerprint library, dbus interface, CLI, and PAM module for unlocking Linux with fingerprint sensors. Currently for Chromebooks. - ChocolateLoverRaj/rust-fp
An already working reimplementation of libfprint in Rust, supposedly easier to use.
So you use the phones login method and then what? An app uses this and sends a message or key or whatever to the Laptop? Over bluetooth? Or USB? Or Wifi?
That honestly sounds like a lot of struggles, but could work.