Mobile: prevent sleep setting

apps/android/app/src/main/java/com/steipete/clawdis/node/MainActivity.kt

@@ -3,6 +3,7 @@ package com.steipete.clawdis.node
 import android.Manifest
 import android.os.Bundle
 import android.os.Build
+import android.view.WindowManager
 import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.viewModels
@@ -10,7 +11,11 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.ui.Modifier
 import androidx.core.content.ContextCompat
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
 import com.steipete.clawdis.node.ui.RootScreen
+import kotlinx.coroutines.launch
 
 class MainActivity : ComponentActivity() {
   private val viewModel: MainViewModel by viewModels()
@@ -21,6 +26,19 @@ class MainActivity : ComponentActivity() {
     requestNotificationPermissionIfNeeded()
     NodeForegroundService.start(this)
     viewModel.camera.attachLifecycleOwner(this)
+
+    lifecycleScope.launch {
+      repeatOnLifecycle(Lifecycle.State.STARTED) {
+        viewModel.preventSleep.collect { enabled ->
+          if (enabled) {
+            window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+          } else {
+            window.clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
+          }
+        }
+      }
+    }
+
     setContent {
       MaterialTheme {
         Surface(modifier = Modifier) {

apps/android/app/src/main/java/com/steipete/clawdis/node/MainViewModel.kt

@@ -23,6 +23,7 @@ class MainViewModel(app: Application) : AndroidViewModel(app) {
   val instanceId: StateFlow<String> = runtime.instanceId
   val displayName: StateFlow<String> = runtime.displayName
   val cameraEnabled: StateFlow<Boolean> = runtime.cameraEnabled
+  val preventSleep: StateFlow<Boolean> = runtime.preventSleep
   val wakeWords: StateFlow<List<String>> = runtime.wakeWords
   val manualEnabled: StateFlow<Boolean> = runtime.manualEnabled
   val manualHost: StateFlow<String> = runtime.manualHost
@@ -44,6 +45,10 @@ class MainViewModel(app: Application) : AndroidViewModel(app) {
     runtime.setCameraEnabled(value)
   }
 
+  fun setPreventSleep(value: Boolean) {
+    runtime.setPreventSleep(value)
+  }
+
   fun setManualEnabled(value: Boolean) {
     runtime.setManualEnabled(value)
   }

apps/android/app/src/main/java/com/steipete/clawdis/node/NodeRuntime.kt

@@ -78,6 +78,7 @@ class NodeRuntime(context: Context) {
   val instanceId: StateFlow<String> = prefs.instanceId
   val displayName: StateFlow<String> = prefs.displayName
   val cameraEnabled: StateFlow<Boolean> = prefs.cameraEnabled
+  val preventSleep: StateFlow<Boolean> = prefs.preventSleep
   val wakeWords: StateFlow<List<String>> = prefs.wakeWords
   val manualEnabled: StateFlow<Boolean> = prefs.manualEnabled
   val manualHost: StateFlow<String> = prefs.manualHost
@@ -145,6 +146,10 @@ class NodeRuntime(context: Context) {
     prefs.setCameraEnabled(value)
   }
 
+  fun setPreventSleep(value: Boolean) {
+    prefs.setPreventSleep(value)
+  }
+
   fun setManualEnabled(value: Boolean) {
     prefs.setManualEnabled(value)
   }

apps/android/app/src/main/java/com/steipete/clawdis/node/SecurePrefs.kt

@@ -41,6 +41,9 @@ class SecurePrefs(context: Context) {
   private val _cameraEnabled = MutableStateFlow(prefs.getBoolean("camera.enabled", true))
   val cameraEnabled: StateFlow<Boolean> = _cameraEnabled
 
+  private val _preventSleep = MutableStateFlow(prefs.getBoolean("screen.preventSleep", true))
+  val preventSleep: StateFlow<Boolean> = _preventSleep
+
   private val _manualEnabled = MutableStateFlow(prefs.getBoolean("bridge.manual.enabled", false))
   val manualEnabled: StateFlow<Boolean> = _manualEnabled
 
@@ -74,6 +77,11 @@ class SecurePrefs(context: Context) {
     _cameraEnabled.value = value
   }
 
+  fun setPreventSleep(value: Boolean) {
+    prefs.edit().putBoolean("screen.preventSleep", value).apply()
+    _preventSleep.value = value
+  }
+
   fun setManualEnabled(value: Boolean) {
     prefs.edit().putBoolean("bridge.manual.enabled", value).apply()
     _manualEnabled.value = value

apps/android/app/src/main/java/com/steipete/clawdis/node/ui/SettingsSheet.kt

@@ -46,6 +46,7 @@ fun SettingsSheet(viewModel: MainViewModel) {
   val instanceId by viewModel.instanceId.collectAsState()
   val displayName by viewModel.displayName.collectAsState()
   val cameraEnabled by viewModel.cameraEnabled.collectAsState()
+  val preventSleep by viewModel.preventSleep.collectAsState()
   val wakeWords by viewModel.wakeWords.collectAsState()
   val isConnected by viewModel.isConnected.collectAsState()
   val manualEnabled by viewModel.manualEnabled.collectAsState()
@@ -155,6 +156,17 @@ fun SettingsSheet(viewModel: MainViewModel) {
 
     item { HorizontalDivider() }
 
+    item { Text("Screen") }
+    item {
+      Row(horizontalArrangement = Arrangement.spacedBy(12.dp), modifier = Modifier.fillMaxWidth()) {
+        Switch(checked = preventSleep, onCheckedChange = viewModel::setPreventSleep)
+        Text(if (preventSleep) "Prevent Sleep" else "Allow Sleep")
+      }
+    }
+    item { Text("Keeps the screen awake while Clawdis is open.") }
+
+    item { HorizontalDivider() }
+
     item { Text("Bridge") }
     item { Text("Status: $statusText") }
     item { if (serverName != null) Text("Server: $serverName") }