manager: brought back isOverlayAvailable()

manager/app/src/main/java/com/rifsxd/ksunext/ui/screen/Module.kt

@@ -428,6 +428,20 @@ private fun ModuleList(
             },
         ) {
             when {
+                !viewModel.isOverlayAvailable -> {
+                    item {
+                        Box(
+                            modifier = Modifier.fillParentMaxSize(),
+                            contentAlignment = Alignment.Center
+                        ) {
+                            Text(
+                                stringResource(R.string.module_overlay_fs_not_available),
+                                textAlign = TextAlign.Center
+                            )
+                        }
+                    }
+                }
+
                 viewModel.moduleList.isEmpty() -> {
                     item {
                         Box(
@@ -537,6 +551,19 @@ fun ModuleItem(
 
         Column(
             modifier = Modifier
+                .run {
+                    if (module.hasWebUi) {
+                        toggleable(
+                            value = isChecked,
+                            interactionSource = interactionSource,
+                            role = Role.Button,
+                            indication = indication,
+                            onValueChange = { onClick(module) }
+                        )
+                    } else {
+			this
+		    }
+                }
                 .padding(22.dp, 18.dp, 22.dp, 12.dp)
         ) {
             Row(

manager/app/src/main/java/com/rifsxd/ksunext/ui/util/KsuCli.kt

@@ -403,6 +403,12 @@ suspend fun getSupportedKmis(): List<String> = withContext(Dispatchers.IO) {
     out.filter { it.isNotBlank() }.map { it.trim() }
 }
 
+fun overlayFsAvailable(): Boolean {
+    val shell = getRootShell()
+    // check /proc/filesystems
+    return ShellUtils.fastCmdResult(shell, "cat /proc/filesystems | grep overlay")
+}
+
 fun hasMagisk(): Boolean {
     val shell = getRootShell(true)
     val result = shell.newJob().add("which magisk").exec()

manager/app/src/main/java/com/rifsxd/ksunext/ui/viewmodel/ModuleViewModel.kt

@@ -11,6 +11,7 @@ import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import com.rifsxd.ksunext.ui.util.listModules
+import com.rifsxd.ksunext.ui.util.overlayFsAvailable
 import org.json.JSONArray
 import org.json.JSONObject
 import java.text.Collator
@@ -45,6 +46,9 @@ class ModuleViewModel : ViewModel() {
         val changelog: String,
     )
 
+    var isOverlayAvailable by mutableStateOf(overlayFsAvailable())
+        private set
+
     var isRefreshing by mutableStateOf(false)
         private set
 
@@ -71,6 +75,8 @@ class ModuleViewModel : ViewModel() {
             val start = SystemClock.elapsedRealtime()
 
             kotlin.runCatching {
+                isOverlayAvailable = overlayFsAvailable()
+                
                 val result = listModules()
 
                 Log.i(TAG, "result: $result")

manager/app/src/main/res/values-zh-rCN/strings.xml

@@ -55,6 +55,7 @@
     <string name="module_restore_failed">恢复失败: %s</string>
     <string name="module_version">版本</string>
     <string name="module_author">作者</string>
+    <string name="module_overlay_fs_not_available">OverlayFS被内核禁用，模块不可用。</string>
     <string name="refresh">刷新</string>
     <string name="show_system_apps">显示系统应用</string>
     <string name="hide_system_apps">隐藏系统应用</string>

manager/app/src/main/res/values/strings.xml

@@ -56,6 +56,7 @@
     <string name="module_restore_failed">Failed to restore: %s</string>
     <string name="module_version">Version</string>
     <string name="module_author">Author</string>
+    <string name="module_overlay_fs_not_available">Modules are unavailable as OverlayFS is disabled by the kernel.</string>
     <string name="refresh">Refresh</string>
     <string name="show_system_apps">Show system apps</string>
     <string name="hide_system_apps">Hide system apps</string>