m-abdurehman/gypapp ? reverse-engineered prompt

Build me a native Android app for a gym inventory system called GymAndroid.

I want it to use a clean, modern UI with Compose and include screens for login, dashboard, members, attendance, and payments. The app should connect to my existing ASP.NET MVC backend over HTTP, using the current server rendered routes and session cookie behavior since there is not a JSON API yet. Please set it up so the backend base URL can be configured from gradle.properties, with a sensible emulator default and easy switching for local network or production.

Make it feel like a real starter app that can grow later into proper REST APIs, so keep the data layer clean and easy to replace. If anything in the backend docs is unclear, look up the current docs online if you need to, then wire up the app so login and the main screens actually work against the live backend as much as possible.