Please consider making the continue function from the main main resume ones run from the shop before the battle one quit from, some interaction don't work in the expected manner and this would let players fix their loadouts when they encounter such an interaction. As an example I had a run end because I thought Red Disc effecting how a dice was scored would not be effected by Red Meat Tasty since it doesn't actually change the dice to red dice. Were I able to go back to the shop I would simply have sold Red Disc or confine it to one score sheet and resume the game.
Considering quitting and resuming can already be used to reset a battle and cheat rolls I don't think this would be harmful in anyway.