Rebuild Shop App as APK

I already run my store from an app I put together with Base44’s no-code builder, but the recurring subscription fees are no longer an option. I need that same application rebuilt for Android only and delivered as a standalone APK that I can install directly on my own devices. All current screens and flows—inventory, sales figures, simple customer alerts and the dashboard—must work exactly as they do now. I will share screenshots, credentials and a walkthrough video so you can mirror them pixel for pixel. Please wire the new build to Supabase (or another open-source backend you recommend) so I can self-host data, authentication and push notifications without ongoing costs. I’m still deciding whether to add new features, so structure the code cleanly and leave room for future modules. Performance on entry-level phones, smooth offline/online sync and clear documentation are important to me. Deliverables • Production-ready Android APK that replicates all existing functionality • Full, well-commented source code in a Git repository • Step-by-step guide for configuring the Supabase backend and building future releases