astashov/liftosaur ? reverse-engineered prompt

Build me a mobile friendly weightlifting tracker app that works like a real app in the browser and can also be wrapped for Android and iPhone.

I want it to help people follow and customize lifting programs like Starting Strength, Stronglifts, GZCLP, and 5 3 1, with a simple way to edit exercises and a more advanced editor for custom progression and deload logic. The app should let users log workouts, see workout history, track bodyweight and measurements, show graphs for lift progress, and calculate plates and rounded weights based on the bars and plates they own. It should also handle warmups, rest timers, exercise substitutions, and show previous results for similar sets or AMRAPs.

Make it work offline first, with progress saving to the cloud if the user signs in. If needed, look up current docs online for any libraries or mobile app details you need.