I don’t want to come across as insensitive, or propose cowardice, or suggest you acquiesce to their every whim, but I really do recommend diplomacy with people such as this. Please don’t escalate the situation or be confrontational, keep your cards in your back pocket until you need to use them.
The state is on their side, and no matter how amenable the latter of the law is to your case your likelihood of losing legally is greater than theirs. Housing is one of the basic needs you need to fulfill and I would try to avoid shitting where I eat until I’m detached enough from their property.
From her panicked texts it seems like she feels cornered, and landlord who feels cornered is liable to pull some wild shit. I don’t know what you sent her but I’m guessing it was something about your legal rights and property terms. I would suggest not letting them know you’re thinking that way.
I hope I’m not swinging wildly at things and making undue assumptions but approach this idiot as carefully as possible, even if you think you have the upper hand