hypridle's suspend listener now runs `nomarchy-on-ac || systemctl
suspend`, so a plugged-in machine no longer suspends itself mid-idle
(long builds, media, presentations survive). It also fires sooner —
15 min, vs the old fixed 30 — since it now only applies unplugged.
Lock and screen-off are unchanged on both power sources, and logind's
lid handling stays at its sensible defaults (suspend on lid close,
ignore when docked).
Closes the idle-cohesion follow-up under the laptop-power roadmap item.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>