manager: Require root access for full features

preventing full-feature UI from enabling unless root is available.

Author: YuKongA

manager/app/src/main/java/me/weishu/kernelsu/ui/MainActivity.kt

@@ -96,6 +96,7 @@ import me.weishu.kernelsu.ui.theme.LocalEnableFloatingBottomBarBlur
 import me.weishu.kernelsu.ui.util.LocalSnackbarHost
 import me.weishu.kernelsu.ui.util.getFileName
 import me.weishu.kernelsu.ui.util.install
+import me.weishu.kernelsu.ui.util.rootAvailable
 import me.weishu.kernelsu.ui.viewmodel.MainActivityViewModel
 import me.weishu.kernelsu.ui.webui.WebUIActivity
 import top.yukonga.miuix.kmp.basic.Scaffold
@@ -225,7 +226,7 @@ fun MainScreen() {
     val pagerState = rememberPagerState(pageCount = { 4 })
     val mainPagerState = rememberMainPagerState(pagerState)
     val isManager = Natives.isManager
-    val isFullFeatured = isManager && !Natives.requireNewKernel()
+    val isFullFeatured = isManager && !Natives.requireNewKernel() && rootAvailable()
     var userScrollEnabled by remember(isFullFeatured) { mutableStateOf(isFullFeatured) }
     val uiMode = LocalUiMode.current
     val surfaceColor = when (uiMode) {