- setup-main-host-button: live availability status, grab-next-subnet helper, error/success feedback
- setup-wireguard-host: harden generated shell scripts with set -e
- check-private-ip-address-availability: add user access check, drop manual body validation
- setup-main-host: pass host object with wg_ip_address
- install-wg-ui.sh: run service as the invoking user (root or sudo) instead of a dedicated wgui user, and skip systemd/OpenRC daemon setup when NODE_ENV=development
tben