muhammadrafiasyddiq/RaffXLink-android ? reverse-engineered prompt

Build me an Android app for phone repair and flashing that makes it easy to work with devices in BROM and Preloader mode using OTG. I want a simple tool where I can back up and flash partitions, check the active slot, switch the active slot, and see a list of eMMC or UFS partitions. It should support ADB and Fastboot too, and have a CLI style mode for advanced actions. Please include multi flash and multi backup, plus an option for non root use. The DA session should stay connected so I do not have to reconnect every time I do another action. Add a clear reboot and shutdown menu, and make the app work in both English and Indonesian. If anything about current Android support or device access needs updated docs, look it up online and make it work well on modern Android too.