No, it's not internal laying if she passed the membrane and you found albumen and yolk.
The term/condition "Internal Laying" is when an egg (can be a whole hard shelled egg too) or parts of an egg have been "laid internally" by reverse peristalsis. This whole egg or parts of the egg would be...
Sounds like she may be able to rejoin her flock soon, especially if no tissue is exposed and would draw attention for picking.
I'm glad to hear she's continuing to improve.
This is a wonderful update!
I'd keep up with the Calcium and your herbal treatments for several more days. The Calcium helps with retention and your herbs may help stave off infection. The picked tissue still has some healing to do, but all sounds like it's going very well!
Keep it up...
Could be a nervous tick. Have you checked her head and ears for mites and lice?
Do the best you can to keep the tissue moist. It's probably going to be crusty with scabs and the urates/discharge may harden on there too. Mineral oil may help loosen some of it up if it sticks really bad...
Well, wound care of a vent is going to be a challenge...poop, possibly trying to lay an egg, etc. You will have to likely clean it many times a day.
A lot depends on how much damage there is whether she'll recover ok or not.
All the photos look like damage to the vent from picking, but the last one, they really have been at her.
Treat as you would a wound, keeping it cleaned and sprayed.
It would be good to get some photos after it's cleaned up so you can access the damage. She may be able to recover from it and...