useReducer instead of mulitple useState

[amjed-98]

great work separating the chart logic into a hook, but I would prefer that you use useReducer because it's better for handling rerenders when multiple states are triggered at once and for I believe it would be much cleaner readable

same thing here in admin file:

[nada-abuzaid]

Thank you Amjad for your review, I don't know what is useReducer before, but now I've learned a new thing, thanks again!