Maybe she should try a nipple shield. Generally, as a Mom struggling to wean her ds from one I wouldn't recomend one but her situation is very intense. For us it was a god send because my nipples were so torn up and i was full of mastitis and clogged ducts, the milk just didn't seem to flow. But now at 4mos ds is still ebf. If she could use it w/ success her confidence would improve so much and the inconvience would be a smal price to pay!
Maybe w/ your help and a LLL leader she could ask the doctor to give her more time between weight checks. I know from first hand experience that such close checks create a lot of pressure and anxiety niether of which are going to help her bf. Also, I think that you were totally right to tel her to git over it. It is unacceptable for her to refuse to feed the baby, that is not an option. She is lucky to have such a dedicated friend.
My family will pray for her as well.