If her leg does not recover, I wouldn't put her back with the flock. If any of them are aggressive she wouldn't be able to escape or defend herself and it's difficult enough to put healthy chickens together after they've been apart.

Have you taken her to a vet? (Yeah, I know, I don't take chickens to the vet either, the bill is more than I can justify) If not, and you don't intend to, then I would first ask whether you are prepared to keep her as a pet, and give her the special care she'll need, then I would want to know whether she is comfortable or whether she's in pain. If she's in pain, the humane thing to do is have her put down, if not, whether she would have a "reasonable good life" would be a matter of perspective. Can she scratch and hunt bugs like any other chicken? Give herself a dirt "bath"? She would most definitely be a "special needs" pet, if she does not recover, so you need to decide how much time and energy you are willing to expend to care for her.

Annie

Sadly after one week in the house and garage, my chick passed away. She was doing better for a while. I was holding on to hope that she may still have a good life despite of her special needs.