logind handles the lid correctly except for the one case it cannot
see: an external display means a closed lid is a docked machine, not
one being put away. Its own docked test looks for an ACPI docking
station that modern hardware does not have.
Panama does not take the lid over to fix that. It holds a logind
handle-lid-switch inhibitor while an external display is connected and
releases it when the last one goes, which needs no lid watcher, no
polling, and no drop-in. The direction it fails in is the point: if the
guard dies, logind's default comes back and a docked laptop suspends,
which is annoying. A drop-in setting HandleLidSwitch=ignore plus a
watcher of our own fails the other way, leaving a lid that does nothing
at all on a machine being carried out of a building.
Locking on the way down needed no work: hypridle's before_sleep_cmd
already runs loginctl lock-session, so a lid-close suspend is a locked
suspend. The contract fails anything that duplicates it.
Not yet verified against a real lid, which is stated in the helper's
header rather than implied by silence. The decision logic, the
inhibitor's shape, and every machine that should hold none of it are
covered.
