The panel-port prompt accepted only y/Y, so yes picked a random port; a custom port was never validated (empty, non-numeric, out-of-range, busy, or leading-zero octal), is_port_in_use never detected a listener, and the installer printed success even when applying the settings failed. Answers are now case-insensitive, custom ports are normalized and checked, the port check is fixed, and the install aborts unless the CLI reports every setting applied. A bash suite runs in shell-lint.
Hamed