Hi and welcome!!
Dinner will be at least an hour. So if Wishes is a must on that night, you will miss it.
You can't see the show from inside the restaurant. Oh yeah, if you have a window seat you may see the occasional low firework, but you won't see 90% of the show.
So if you can see Wishes on another night, plan that. If not, you will have to decide which is more important....dinner at CRT, or Wishes. ( I would pick Wishes...)