OP, I hope you’re OK and enjoying the weekend without obsessing over this nasty piece of work. She's made herself look like an idiot, believe me.
Not quite the same, but many years ago, a graduate trainee was given a task of mine to do when I was on annual leave - it was something that HAD to be done, and because DD was still a baby and I could get a call from her nursery without warning asking me to pick her up (she had a gastric disorder that was still in the process of being investigated so had a lot of random vomits), I had already made very detailed process notes for what was a boring routine task, written in very simple language with screenshots and illustrations so that anyone could pick it up in my absence and run the process.
I came back from leave to find she'd put in a formal complaint about me because my notes were "rubbish" so she hadn't done the process, and I was "obviously incompetent". I was called into the boss's office and told this while she sat there smirking at me.
I smiled, asked if I could bring colleagues A, B and C into this discussion, all of whom had successfully run the process before from my notes, none of whom had prior experience. I said I'd love to know what the difficulties she'd encountered were that she couldn't overcome, so I could improve my notes. I also expressed surprise that she hadn't asked anyone else to clarify anything she couldn't follow.
Turns out the little moo hadn't even bothered to do it because she felt it was beneath her as a graduate...
So keep it pleasant, keep it professional (no matter how much you want to cry and yell) and remember she's the one making herself look bad, not you.
And she's not a friend. She's toxic.