Merge pull request #470 from erikdarlingdata/fix/locale-date-format

Use user locale for date/time formatting (closes #459)

Author: erikdarlingdata

Dashboard/App.xaml.cs

@@ -11,6 +11,7 @@
 using System.Threading;
 using System.Threading.Tasks;
 using System.Windows;
+using System.Windows.Markup;
 using System.Windows.Threading;
 using PerformanceMonitorDashboard.Helpers;
 
@@ -39,6 +40,11 @@ protected override void OnStartup(StartupEventArgs e)
 
             base.OnStartup(e);
 
+            // Use the user's locale for date/time formatting in WPF bindings (issue #459)
+            FrameworkElement.LanguageProperty.OverrideMetadata(
+                typeof(FrameworkElement),
+                new FrameworkPropertyMetadata(XmlLanguage.GetLanguage(Thread.CurrentThread.CurrentCulture.IetfLanguageTag)));
+
             // Apply saved color theme before the main window is shown
             var prefs = new Services.UserPreferencesService().GetPreferences();
             ThemeManager.Apply(prefs.ColorTheme ?? "Dark");