Ever installed a beta build on your phone, and it silently replaced your production app? Then you opened it, and it was logged into your production account, talking to your production API? Me too. That's the day I decided my beta and production builds needed to be two completely separate apps. The usual answer is "just use EAS build profiles." And EAS is fine, but you don't need it for this. Everything EAS does with build variants is powered by something that already lives in your project: C...