That’s a horrible feeling OP. I think if you got a vibe from her then trust your instincts.
Don’t give her the satisfaction of knowing she’s got to you though. You are an adult now. She, perhaps, still has some maturing to do. Be the bigger, wiser, kinder, stronger one.
Put a welcome to the neighbourhood card through the door with info re the right of way. Hope she’ll be happy in her new home and then remain distant but polite and minimally friendly.
Her actions as a child make me think that she may not have had a happy childhood. Those aren’t the actions of a settled, happy, well adjusted child. It is likely, without having worked on herself, she still has some unhealthy ways of relating to others and if she was subtly goading you then that is even more likely.
Keep your distance but be strong and keep your boundaries when you need to.
Log it with police to start that process. Chances are it was just a photo to say ‘look who I’ve moved next to’ but she sounds a bit like there is a possible risk she could be difficult.
Hopefully she has grown up a bit but just in case keep a distance and live your best life according to what matters most to you regardless of what she’s doing.