* Fix shell injection in `lmncli version` (dpkg -l via shell=True).
* Fix crash on error in `student manage` (invalid typer.Colors.RED, missing paren).
* Fix reset-internet matching schoolclass by substring instead of exact name.
* Fix IndexError on malformed DN in printers and devices listing.
* Fix room prefix filter using startswith instead of unsafe index access.
* Add "Unknown" status fallback in devices listing.
* Use context manager for user-kill log file handle.
* Guard against empty teacher login in check_smbclient.
* Rename asdict -> as_dict to match linuxmuster-tools.
