As she has already suffered these fits even while sitting on the coop floor, maybe put her in a carrier at night with the rolled up towel underneath her head/beak to be safer.
Her beak injury looks as if she was scratching it alongside the metal of a fence or feeder or metal cage.
I hope she...
Supplementing her with vitamin E and B complex will help in case of deficiency and also with regenerating possible nerve damage.
Sadly, I don't know of any vet or even avian vet willing or able to perform ostheopathy on a chicken, so time will tell if she recovers.
But until then I think it...
Very interesting case, indeed!
Did she have an accident recently? Do or did you have a rooster in your flock? If so, he might have tugged her head the wrong way while mating, thus displacing her neck/cervical vertebras (first and second = atlas and axis) which would cause pressure on one ear...