S.T.
I was a podiatrist in the UK for eleven years, so this is where my perspective comes from. I know you are asking for a friend, so some of this advice may be redundant. Surgery for pl fasciitis is very very rarely done. This is beacuse it very very rarely works! What is done is the removal of the bone spur that is deemed to be causing the problem. But the bone spur is attached to the fascia underneath the foot, so they reattach the fascia back on the calcaneus (heel) bone and all is well for just a little while. Then after the patient walks around again for a year or so the fascia pulls again on that attachment and hello new heel spur. So it is best treated by losing weight, correcting the over pronation or arch defect that originally caused the issue, steroid and antiinflammatories, and footwear. I always recommend crocs for my heel spur sufferers. Getting over the bone spur surgery will required at least two weeks of not walking on it, probably six of not standing for prolonged periods of time.
Edit - Just noticed she already had her surgery - so don't tell her what I said about it not working lol. That may not please her too much. The crocs will be awesome for her though