what is cuso4-rootmanager fr?

CuSO4 Open is an open source Android app that acts as a front end for ROOT management on rooted phones. Rooting an Android device gives an app the ability to read and change parts of the system that are normally locked away from regular apps, and the standard tools for doing this are projects called Magisk, KernelSU, and APatch. CuSO4 Open provides a single user interface that talks to whichever of those tools is already installed. The README is firm on one point: this app does not replace Magisk or KernelSU. The official ROOT manager has to be installed first, otherwise CuSO4 Open cannot run. The author calls this both a safety feature and a budget choice. The listed features are module management, meaning the user can install, enable, disable, and remove ROOT modules from inside the app, plus Magisk specific information such as the current kernel version, the Magisk version, whether Zygisk is on, and whether the boot ramdisk has been patched. There is also a one click option to remove ROOT or Magisk completely without going through several reboots. Under the hood the app is a native Android shell, written in Kotlin, that wraps a WebView. The user interface lives in android/app/src/main/assets/home as HTML, CSS, and JavaScript, and the Kotlin code sits next to it in the java folder. The app asks for three permissions: INTERNET for downloading modules, FOREGROUND_SERVICE for long running work, and POST_NOTIFICATIONS for install progress. To build from source the README asks for Android Studio Hedgehog or later, Android SDK 34, Gradle 8.9, and JDK 17, then a normal ./gradlew assembleDebug produces the debug APK. Pre-built APKs are also offered on the GitHub Releases page. The minimum supported Android version is 5.0.