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.
install.sh and update.sh stripped the leading slash and regenerated webBasePath whenever the rest was shorter than four characters, so valid short paths such as /a/ or /ab/ were replaced by a random one on every update or reinstall. Only an empty or root path is initialized now, and both scripts read one settings snapshot and leave the settings alone when that read fails or is malformed. Fixes#6961.
Hamed