I'll make sure to keep her in my prayers; strokes are nothing to mess with, but the fact that it was a mini-stroke is a lot better than a full blown one. It's like your body's warning that the potential for a bigger one is near unless you make some changes.
If you can get her on a exercise flow, switch up her eating habits, and make sure she takes all of the meds prescribed on a consistent basis, she'll get better. It sounds like you got a strong mom so I know she'll get through this. Stay strong