You can buy all sorts of gadgets like one handed peelers, choppers, electric tin openers which are ideal for long term conditions but expensive for short term use. If she has nobody to help her day to day she can buy peeled and ready prepared potatoes and veg, but of course these are more expensive but they are there.
Hopefully she will prepare her clothing before hand. She will need clothes that are easy to pull on, off and toilet. Slip on shoes or easy fastener (should be easy in the summer with sandals).
I strongly recommend a rotating hot brush. My wife swears by hers and no longer uses her hair dryer, straighteners or other gadgets. Very easy to use with one hand and she will carry on using it.