main extracted the launchd backend and the setup wizard out of hermes_cli/gateway.py. The
eight launchd functions pm-clean had changed are ported into gateway_launchd.py in its
_gw() style: runtime_command/installation_command for the gateway argv (no VIRTUAL_ENV in
the plist, XML-escaped args), _prepare_service_launcher before every plist write,
utf-8-sig plist reads, and launchd_restart's refresh-first + bounded bootstrap revival.
The systemd service-unit cluster stays in the facade (no gateway_service_unit sibling).
backup.py takes main's browser_profiles backup-only exclusion on our profile_root_entry
shape. main.ts takes main's attach-first backend block with our explicit types.
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