On macOS, launchctl bootout permanently unloads the LaunchAgent plist.
Even with KeepAlive: true, launchd cannot respawn a service whose plist
has been removed from its registry. This left users with a dead gateway
requiring manual 'openclaw gateway install' to recover.
Affected trigger paths:
- openclaw gateway restart from an agent session (#43311)
- SIGTERM on config reload (#43406)
- Gateway self-restart via SIGTERM (#43035)
- Hot reload on channel config change (#43049)
Switch restartLaunchAgent() to launchctl kickstart -k, which force-kills
and restarts the service without unloading the plist. When the restart
originates from inside the launchd-managed process tree, delegate to a
new detached handoff helper (launchd-restart-handoff.ts) to avoid the
caller being killed mid-command. Self-restart paths in process-respawn.ts
now schedule the detached start-after-exit handoff before exiting instead
of relying on exit/KeepAlive timing.
Fixes#43311, #43406, #43035, #43049
3c0fd3dffe