Ah! Academia! Sometimes my employer requires me to use excessive quantities of words!
Also called a camp chair:
As I recall, the platform that I built for my second platform bed was a 4' piece of plywood with boards screwed on each side, so I have 32" of 1x4s to support my head and shoulders, and then Downy-soft plywood for the rest of me.
That was okay, resting on a metal bed frame, but a plywood floor, nailed to 2x4s, with padding, and carpet, is hard and unyielding?
Hopefully 2" of foam glued to the platform will make it more tolerable.
I need to see how that platform fits under my loft bed and with my mattress.
Screw a box to the top of the platform, attach boat seat swivel to the corners, and screw the other side to plywood cut to fit inside the side and attached with pocket screws.
The folding desk is the hard part, right?