615448b875
When ip_range changes in Settings, the new subnet is now applied to: - DNS zone records (network_manager.apply_ip_range) - Caddy virtual IPs (firewall_manager.ensure_caddy_virtual_ips) - iptables per-service rules (firewall_manager.update_service_ips) - docker-compose.yml static IPs if writable (ip_utils.update_docker_compose_ips) New module ip_utils.py derives all container IPs from the subnet using fixed offsets so the entire stack stays consistent from one setting. 321 tests pass (72 new tests added for ip_utils, apply_ip_range, update_service_ips). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>