makeplane/plane-mobile ? reverse-engineered prompt

Build me a Flutter mobile app for Plane, an open source project planning tool.

I want it to let users track issues, view issue details, organize work into cycles and modules, and switch between list, kanban, and calendar views. Make the issue screen feel polished and easy to use, with support for rich text notes, file uploads, sub items, and references. The app should connect to a backend API from an env file, so keep the API base URL configurable and make it easy to run locally on Android and iOS.

Please make the UI clean and modern, similar to a productivity app, and include the core screens someone would expect for browsing projects, opening an issue, and checking progress. If you need to confirm anything about current Flutter best practices or package versions, look up the latest docs online.