I was going to cheat a bit and just take the inside black shell and somehow squeeze it in to a small floating shelf drawer I have but I don't have the tools I'd need to make a good job of making holes for the ports and I'm not sure how well the Bluetooth would work if it was completely covered like that (I'm sure it would be fine) and airflow would be taken care of by a tiny Noctua fan I have knocking around.

That was the idea, I don't have a printer but I'd pay to have it done, I'm not particularly handy so I wouldn't have much confidence in building something myself what with it needing to be very accurate to line up all the ports

The problem with making a legal case is that she doesn't have proof she did actually work those hours, she would need to get coworkers involved as witnesses which they would most likely be wary of doing in case it affects their employment...maybe she has clients she can contact as they would have nothing to lose by giving a statement? Request any CCTV?

It might be a tricky one and it sucks big time, she needs to gtfo out of such a shitty job and maybe just cut her losses while bashing them on social media every chance she can get, the backlash might prompt a response from the company.