Ok, I have to jump in here as a normal NT woman with normal dating/flirting experience.
Everything I read is telling me she likes you. As an aspie you are probably a bit aloof and she finds you interesting and is trying to get to know you. The paper seems to bore her and she is not interested in it much, so I think she has not interest in stealing your paper! By texting you she is trying to take it to a more personal level. Same with talking about her grandmother and taking you to the coffee shop she works at, etc. Maybe this is overwhelmingly personal for you but it is appropriate behavior for her.
As far as her asking if you live alone being a “game on” for sex….I doubt it. I would imagine she is just making conversation, same about her telling you she was sick, don’t read “sex” into it at this point. She is trying to get to know you. As far as how she dresses, she is probably dressing up to impress you a bit, get you interested and “revved” up for her. Again, this is what woman do but is not an invitation for “sex”.
I would do this in flirting with a man, just like she did: (but that doesn’t mean I want him for sex at this point)
a message later just asking me "what I was up to" and "what I was doing later". It is really hard to describe, but she was overly thankful about me helping her with the college affairs, mentioning that at least two times in each message. (I would do this to give a guy a nice ego boost)
This is key, her texting you this: "I hope you slept well", that is her trying to have a more intimate, personal text with you and hoping for a response.
Then she was very disappointed to get this, instead of something more personal :
“I sent her a more detailed overview to work with. That was the last thing that happened, she has not written me again since.”
So all is not lost and I’m sure she is still interested but you need to respond appropriately. To her “hope you slept well” text, she was probably hoping you would respond in kind “I did, hope you slept well too”. Something like that.
You should ask her for coffee again, or a movie or something else you think you would both enjoy.
But if you really don't want a girlfriend then don't toy with her either.