Okay I just checked my mail. She claims now that I caused the rollout bed to smell bad so she plans on replacing the whole thing (which is categorically impossible, her sheet stayed on it the 3 months I used it, and I put a futon mattress+another sheet of my own on top of it). But even if I had caused the bed to smell, which I didn’t, she would only have cause to replace the mattress, not the whole frame+mattress assembly.
She also says she has a contractor coming out to assess damage to the area of the carpet where my chair was sitting and she is planning on replacing the entire carpet. heh. I told her that replacing the entire carpet and entire bed were not acceptable to me, and I believed she was intentionally dealing with me in bad faith now. Didn’t break out the small claims gem yet but I provided her with 2 of the links given to me by alice_in_wonderland. Thanks again for the support 
I think I scared her into claiming that she was planning to provide me with receipts all along, at least. I know gut feelings aren’t admissible as evidence, but I feel quite sure she was planning to hang onto the deposit without accounting for it until I demonstrated my knowledge of tenant law. yay for progress <3
Also I would be leery of getting a law student to type up an official-looking letter. It’s illegal to impersonate a lawyer and I don’t want to risk that kind of exposure.