Bring the fingerprint affordance to the Quickshell lock screen and polkit
dialog, matching what hyprlock did on master.
Lock screen: render the md-fingerprint glyph inside the password field's
right edge when a sensor is enrolled, reserving space so long passwords
never run under it.
Polkit dialog: show one method at a time. When a sensor is enrolled and
the reader is reachable, the dialog is just the centered fingerprint icon
(square card); the moment PAM asks for a password it switches to the
password field. Detects pam_fprintd anywhere in the auth stack now that a
gate can precede it.
Lid awareness: a closed lid means the reader is unreachable, so both
surfaces fall back to the password. polkit gets a pam_exec clamshell gate
(auth [success=1 default=ignore] before pam_fprintd) so a shut lid drops
straight to the password prompt instead of blocking on the reader for the
pam_fprintd timeout; the lock screen hides the icon and skips scanning.
The gate points at the fixed /usr/bin path the package always provides so
it survives switching between package installs and dev-link. A migration
adds the gate for existing fingerprint setups.
New helper omarchy-hw-laptop-closed (pure lid state); omarchy-hw-clamshell
now composes it with the external-monitor check.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
