I'm sure she's sleeping; she's just opening her eyes when she hears someone coming in. Chickens are like thatOne question I didn’t see answered: how to help a chicken sleep or at least rest well enough to heal.
And what are the signs that a chicken is no longer in shock?

Alert, eating/drinking is usually a good sign they are no longer in shock.
Curiously pecking at instruments (tweezers, scissors) that were laid beside her is also a sign of alertness. Chickens peck at things out of curiosity and investigation.
I agree on all counts, leave the wounds open, no stitching, no covering, no gluing.
It's going to take time to heal, but if tended to as they are doing now, then very likely she'll heal up fine.