Icon work - and apptheming

WebViewDemo/App.xaml.cs

@@ -0,0 +1,35 @@
+// App.xaml.cs - Main Application with NavigationPage and Theme Support
+
+using Microsoft.Maui.Controls;
+
+namespace WebViewDemo;
+
+public partial class App : Application
+{
+    public static NavigationPage? NavigationPage { get; private set; }
+
+    public App()
+    {
+        InitializeComponent();
+
+        // Determine current theme for navigation bar colors
+        var isDarkMode = Application.Current?.RequestedTheme == AppTheme.Dark;
+        var barBackground = isDarkMode ? Color.FromArgb("#3949AB") : Color.FromArgb("#5C6BC0");
+
+        NavigationPage = new NavigationPage(new WebViewPage())
+        {
+            Title = "OpenMaui WebView Demo",
+            BarBackgroundColor = barBackground,
+            BarTextColor = Colors.White
+        };
+
+        // Update navigation bar when theme changes
+        Application.Current!.RequestedThemeChanged += (s, e) =>
+        {
+            var dark = e.RequestedTheme == AppTheme.Dark;
+            NavigationPage.BarBackgroundColor = dark ? Color.FromArgb("#3949AB") : Color.FromArgb("#5C6BC0");
+        };
+
+        MainPage = NavigationPage;
+    }
+}