betaflight/betaflight-configurator ? reverse-engineered prompt

Build me a cross platform Betaflight configurator app that lets pilots connect to their flight controller and manage settings from one place.

I want a clean modern interface that works as a web app and also as a desktop and Android app. It should let people read and change common flight controller settings, save and restore configs, see live status and basic sensor info, and make it easy to switch languages on the first screen. Keep it polished and friendly for both beginners and experienced users, with sensible defaults and clear warnings when changes could affect a model.

Please make it feel like a real production app, not a demo, and set it up so it can be run locally for development and built for release. Use the current best docs if you need to check anything while implementing it.