Wow, you did a great job I admire you for that. I've never seen such dedication to saving a chicken. I have seen it with exotic birds, but never with a chicken.
Though I might give you an idea, incase I overlooked it in all the post. They do make prosthetic beaks for birds, usually exotics. But none the less, having a beak bitten off with parrots in captivity is a common problem with breeding parrots and large exotic birds. Maybe consider speaking to a avian vet, you may have one near you who can possibly guide you in replacing her beak so she could forage with the other chickens in the coop. Usually Avian vets don't list in the phone book as Avian Vets, you may have to call around one of the clinics with multiple vets, usually they know of one nearby who can help you if your interested. Otherwise, she looks great!
She is doing great, again I admire you for all you did with her.......