Passkey support broken on Linux Desktop

On the Linux Desktop Canary app (from any source), the "Sign in with a passkey" button does not open any OS-level dialog, or detect that it can't. Because of this, it's impossible to sign in on the Linux Desktop app without an existing session. (Tested on Fedora/GNOME/Wayland on AppImage/RPM and Mint/XFCE/X11 on AppImage.) As far as I can tell, this is a duplicate of #113, but that issue was bulk-closed and is still present.

Canary Desktop 2026.913.210037, Web 2026.914.202100, Linux 7.1.10-200.fc44.x86_64 (x64), Electron 44.1.1, Chrome 152.0.7977.65, Node 24.19.0, Locale en-US