Hospital food can get people down sometimes. Does your friend like any snacks? Drinks? Nibbly bits? Something that she really enjoys might help make her feel more like her self iyswim and will help a little to keep her spirits up, she needs to eat to keep her energy up but it was the one things I couldn't be bothered with. Someone bought me a load of yummy nibbly bits and I did pick at them and it got me eating. Sweets can be good too, favourite books, magazines, etc help to keep her mind a little occupied something that is easy to pick up and put down. Think comforting things that your friend likes.
Lip, hand and face cream are always great!
NICE tissues - the once that don't make your nose feel as raw.
I know a few people that the misting cooling sprays have gone down really well.
Washing clothing might be very much appreciated too, does she need any supplies of things like breast pads, maternity pads, big comfy knickers or yoga pants that might not make her feel too sore. (Friends were much better at picking me up bits that EXDH, and I felt more able to ask them, they also got bits that they knew I would like)
Would helping her wash her hair or get changed etc make her feel a bit more human? Oddly practical stuff was the thing I struggled with the most, couldn't wash my hair and DH was blinky crap at it. A friend popped in took one look and something along the lines of "I'm here, why don't you pop home and pick up x,y,z bits DH" Once he'd gone we have a good cry, then she asked what is the one things that you really want, anything?" She helped me wash, dry, brush and put my hair up and really did make me feel better. It let me clean off that yucky feeling iyswim.
My bet would be that the thing she wants the most, is a hug and a chat.