Mobile: prevent sleep setting

apps/ios/Sources/RootCanvas.swift

@@ -1,9 +1,12 @@
 import SwiftUI
+import UIKit
 
 struct RootCanvas: View {
     @Environment(NodeAppModel.self) private var appModel
     @Environment(VoiceWakeManager.self) private var voiceWake
+    @Environment(\.scenePhase) private var scenePhase
     @AppStorage(VoiceWakePreferences.enabledKey) private var voiceWakeEnabled: Bool = false
+    @AppStorage("screen.preventSleep") private var preventSleep: Bool = true
     @State private var presentedSheet: PresentedSheet?
     @State private var voiceWakeToastText: String?
     @State private var toastDismissTask: Task<Void, Never>?
@@ -63,6 +66,9 @@ struct RootCanvas: View {
             }
         }
         .preferredColorScheme(.dark)
+        .onAppear { self.updateIdleTimer() }
+        .onChange(of: self.preventSleep) { _, _ in self.updateIdleTimer() }
+        .onChange(of: self.scenePhase) { _, _ in self.updateIdleTimer() }
         .onChange(of: self.voiceWake.lastTriggeredCommand) { _, newValue in
             guard let newValue else { return }
             let trimmed = newValue.trimmingCharacters(in: .whitespacesAndNewlines)
@@ -83,6 +89,7 @@ struct RootCanvas: View {
             }
         }
         .onDisappear {
+            UIApplication.shared.isIdleTimerDisabled = false
             self.toastDismissTask?.cancel()
             self.toastDismissTask = nil
         }
@@ -104,6 +111,10 @@ struct RootCanvas: View {
 
         return .disconnected
     }
+
+    private func updateIdleTimer() {
+        UIApplication.shared.isIdleTimerDisabled = (self.scenePhase == .active && self.preventSleep)
+    }
 }
 
 private struct OverlayButton: View {

apps/ios/Sources/Settings/SettingsTab.swift

@@ -21,6 +21,7 @@ struct SettingsTab: View {
     @AppStorage("node.instanceId") private var instanceId: String = UUID().uuidString
     @AppStorage("voiceWake.enabled") private var voiceWakeEnabled: Bool = false
     @AppStorage("camera.enabled") private var cameraEnabled: Bool = true
+    @AppStorage("screen.preventSleep") private var preventSleep: Bool = true
     @AppStorage("bridge.preferredStableID") private var preferredBridgeStableID: String = ""
     @AppStorage("bridge.lastDiscoveredStableID") private var lastDiscoveredBridgeStableID: String = ""
     @AppStorage("bridge.manual.enabled") private var manualBridgeEnabled: Bool = false
@@ -73,6 +74,13 @@ struct SettingsTab: View {
                         .foregroundStyle(.secondary)
                 }
 
+                Section("Screen") {
+                    Toggle("Prevent Sleep", isOn: self.$preventSleep)
+                    Text("Keeps the screen awake while Clawdis is open.")
+                        .font(.footnote)
+                        .foregroundStyle(.secondary)
+                }
+
                 Section("Bridge") {
                     LabeledContent("Discovery", value: self.bridgeController.discoveryStatusText)
                     LabeledContent("Status", value: self.appModel.bridgeStatusText)