[Light Switch] Add 10s timeout and pre-check for location detection (#45887)

<!-- Enter a brief description/summary of your PR here. What does it
fix/what does it change/how was it tested (even manually, if necessary)?
-->
- Add 10-second timeout to GetGeopositionAsync to prevent infinite
spinner
- Pre-check location services availability when dialog opens; disable
Detect Location button with message if unavailable
- Show user-friendly error messages for timeout and unavailable
scenarios
- Add LocationErrorText UI element and localized string resources

<!-- Please review the items on the PR checklist before submitting-->
## PR Checklist

- [x] Closes: #45860
- [x] Closes: #42852

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

src/settings-ui/Settings.UI/SettingsXAML/Views/LightSwitchPage.xaml

@@ -376,6 +376,12 @@
                                 VerticalAlignment="Center"
                                 IsActive="False"
                                 Visibility="Collapsed" />
+                            <TextBlock
+                                x:Name="LocationErrorText"
+                                Grid.Row="2"
+                                Foreground="{ThemeResource SystemFillColorCriticalBrush}"
+                                TextWrapping="Wrap"
+                                Visibility="Collapsed" />
                             <Grid
                                 x:Name="LocationResultPanel"
                                 Grid.Row="2"

src/settings-ui/Settings.UI/SettingsXAML/Views/LightSwitchPage.xaml.cs

@@ -7,6 +7,7 @@ using System.Globalization;
 using System.IO;
 using System.IO.Abstractions;
 using System.Linq;
+using System.Threading;
 using System.Threading.Tasks;
 using Common.UI;
 using ManagedCommon;
@@ -25,6 +26,8 @@ namespace Microsoft.PowerToys.Settings.UI.Views
 {
     public sealed partial class LightSwitchPage : NavigablePage, IRefreshablePage
     {
+        private static readonly TimeSpan GeoLocationTimeout = TimeSpan.FromSeconds(10);
+
         private readonly string appName = "LightSwitch";
         private readonly SettingsUtils settingsUtils;
         private readonly Func<string, int> sendConfigMsg = ShellPage.SendDefaultIPCMessage;
@@ -101,6 +104,7 @@ namespace Microsoft.PowerToys.Settings.UI.Views
             this.SyncLoader.IsActive = true;
             this.SyncLoader.Visibility = Visibility.Visible;
             this.LocationResultPanel.Visibility = Visibility.Collapsed;
+            this.LocationErrorText.Visibility = Visibility.Collapsed;
 
             try
             {
@@ -108,13 +112,15 @@ namespace Microsoft.PowerToys.Settings.UI.Views
                 var accessStatus = await Geolocator.RequestAccessAsync();
                 if (accessStatus != GeolocationAccessStatus.Allowed)
                 {
-                    // User denied location or it's not available
+                    ShowLocationError(ResourceLoaderInstance.ResourceLoader.GetString("LightSwitch_LocationError_Unavailable"));
                     return;
                 }
 
                 var geolocator = new Geolocator { DesiredAccuracy = PositionAccuracy.Default };
 
-                Geoposition pos = await geolocator.GetGeopositionAsync();
+                using var cts = new CancellationTokenSource(GeoLocationTimeout);
+                var positionTask = geolocator.GetGeopositionAsync().AsTask(cts.Token);
+                Geoposition pos = await positionTask;
 
                 double latitude = Math.Round(pos.Coordinate.Point.Position.Latitude);
                 double longitude = Math.Round(pos.Coordinate.Point.Position.Longitude);
@@ -130,7 +136,6 @@ namespace Microsoft.PowerToys.Settings.UI.Views
                 // Since we use this mode, we can remove the selected city data.
                 this.ViewModel.SelectedCity = null;
 
-                // ViewModel.CityTimesText = $"Sunrise: {result.SunriseHour}:{result.SunriseMinute:D2}\n" + $"Sunset: {result.SunsetHour}:{result.SunsetMinute:D2}";
                 this.SyncButton.IsEnabled = true;
                 this.SyncLoader.IsActive = false;
                 this.SyncLoader.Visibility = Visibility.Collapsed;
@@ -139,18 +144,29 @@ namespace Microsoft.PowerToys.Settings.UI.Views
                 this.LongitudeBox.IsEnabled = true;
                 this.LocationResultPanel.Visibility = Visibility.Visible;
             }
+            catch (OperationCanceledException)
+            {
+                ShowLocationError(ResourceLoaderInstance.ResourceLoader.GetString("LightSwitch_LocationError_Timeout"));
+            }
             catch (Exception ex)
             {
-                this.SyncButton.IsEnabled = true;
-                this.SyncLoader.IsActive = false;
-                this.SyncLoader.Visibility = Visibility.Collapsed;
-                this.LocationResultPanel.Visibility = Visibility.Collapsed;
-                this.LatitudeBox.IsEnabled = true;
-                this.LongitudeBox.IsEnabled = true;
+                ShowLocationError(ResourceLoaderInstance.ResourceLoader.GetString("LightSwitch_LocationError_Timeout"));
                 Logger.LogInfo($"Location error: " + ex.Message);
             }
         }
 
+        private void ShowLocationError(string message)
+        {
+            this.SyncButton.IsEnabled = true;
+            this.SyncLoader.IsActive = false;
+            this.SyncLoader.Visibility = Visibility.Collapsed;
+            this.LocationResultPanel.Visibility = Visibility.Collapsed;
+            this.LatitudeBox.IsEnabled = true;
+            this.LongitudeBox.IsEnabled = true;
+            this.LocationErrorText.Text = message;
+            this.LocationErrorText.Visibility = Visibility.Visible;
+        }
+
         private void LatLonBox_ValueChanged(NumberBox sender, NumberBoxValueChangedEventArgs args)
         {
             double latitude = this.LatitudeBox.Value;
@@ -301,6 +317,21 @@ namespace Microsoft.PowerToys.Settings.UI.Views
         {
             this.LocationDialog.IsPrimaryButtonEnabled = false;
             this.LocationResultPanel.Visibility = Visibility.Collapsed;
+            this.LocationErrorText.Visibility = Visibility.Collapsed;
+
+            // Pre-check location services availability
+            var accessStatus = await Geolocator.RequestAccessAsync();
+            if (accessStatus != GeolocationAccessStatus.Allowed)
+            {
+                this.SyncButton.IsEnabled = false;
+                this.LocationErrorText.Text = ResourceLoaderInstance.ResourceLoader.GetString("LightSwitch_LocationError_Unavailable");
+                this.LocationErrorText.Visibility = Visibility.Visible;
+            }
+            else
+            {
+                this.SyncButton.IsEnabled = true;
+            }
+
             await this.LocationDialog.ShowAsync();
         }
 

src/settings-ui/Settings.UI/Strings/en-us/Resources.resw

@@ -5150,6 +5150,12 @@ The break timer font matches the text font.</value>
   <data name="LightSwitch_SunsetTooltip.Text" xml:space="preserve">
     <value>Sunset</value>
   </data>
+  <data name="LightSwitch_LocationError_Timeout" xml:space="preserve">
+    <value>Unable to connect to location services. Please try again or enter your coordinates manually.</value>
+  </data>
+  <data name="LightSwitch_LocationError_Unavailable" xml:space="preserve">
+    <value>Location services unavailable. Please enter your coordinates manually.</value>
+  </data>
   <data name="Close_NavViewItem.Content" xml:space="preserve">
     <value>Close PowerToys</value>
     <comment>Don't loc "PowerToys"</comment>