Oh wow there’s a lot going on since I last checked in on you, well done on that interview, you’ve obviously impressed them - if this isn’t right for you then this obviously good interview performance bodes well for getting another job.

On your boss, she certainly sounds like she’s got narcissistic traits and seems quite easily irked. What you did (the arm touch) doesn’t seem like a biggie to me although it was in retrospect not a wise move. She sounds like she’s got you on eggshells.