Update with recovered code from VM binaries (Jan 1)

Recovered from decompiled OpenMaui.Controls.Linux.dll:
- SkiaShell.cs: FlyoutHeader, FlyoutFooter, scroll support (918 -> 1325 lines)
- X11Window.cs: Cursor support (XCreateFontCursor, XDefineCursor)
- All handlers with dark mode support
- All services with latest implementations
- LinuxApplication with theme change handling

Services/AppInfoService.cs

@@ -0,0 +1,147 @@
+using System;
+using System.Diagnostics;
+using System.Reflection;
+using Microsoft.Maui.ApplicationModel;
+
+namespace Microsoft.Maui.Platform.Linux.Services;
+
+public class AppInfoService : IAppInfo
+{
+	private static readonly Lazy<AppInfoService> _instance = new Lazy<AppInfoService>(() => new AppInfoService());
+
+	private readonly Assembly _entryAssembly;
+
+	private readonly string _packageName;
+
+	private readonly string _name;
+
+	private readonly string _versionString;
+
+	private readonly Version _version;
+
+	private readonly string _buildString;
+
+	public static AppInfoService Instance => _instance.Value;
+
+	public string PackageName => _packageName;
+
+	public string Name => _name;
+
+	public string VersionString => _versionString;
+
+	public Version Version => _version;
+
+	public string BuildString => _buildString;
+
+	public LayoutDirection RequestedLayoutDirection => (LayoutDirection)1;
+
+	public AppTheme RequestedTheme
+	{
+		get
+		{
+			//IL_0042: Unknown result type (might be due to invalid IL or missing references)
+			//IL_0045: Unknown result type (might be due to invalid IL or missing references)
+			//IL_003d: Unknown result type (might be due to invalid IL or missing references)
+			//IL_0039: Unknown result type (might be due to invalid IL or missing references)
+			//IL_0022: Unknown result type (might be due to invalid IL or missing references)
+			try
+			{
+				string environmentVariable = Environment.GetEnvironmentVariable("GTK_THEME");
+				if (!string.IsNullOrEmpty(environmentVariable) && environmentVariable.Contains("dark", StringComparison.OrdinalIgnoreCase))
+				{
+					return (AppTheme)2;
+				}
+				if (GetGnomeColorScheme().Contains("dark", StringComparison.OrdinalIgnoreCase))
+				{
+					return (AppTheme)2;
+				}
+				return (AppTheme)1;
+			}
+			catch
+			{
+				return (AppTheme)1;
+			}
+		}
+	}
+
+	public AppPackagingModel PackagingModel
+	{
+		get
+		{
+			if (Environment.GetEnvironmentVariable("FLATPAK_ID") == null)
+			{
+				if (Environment.GetEnvironmentVariable("SNAP") == null)
+				{
+					if (Environment.GetEnvironmentVariable("APPIMAGE") == null)
+					{
+						return (AppPackagingModel)1;
+					}
+					return (AppPackagingModel)0;
+				}
+				return (AppPackagingModel)0;
+			}
+			return (AppPackagingModel)0;
+		}
+	}
+
+	public AppInfoService()
+	{
+		_entryAssembly = Assembly.GetEntryAssembly() ?? Assembly.GetExecutingAssembly();
+		_packageName = _entryAssembly.GetName().Name ?? "Unknown";
+		_name = _entryAssembly.GetCustomAttribute<AssemblyTitleAttribute>()?.Title ?? _packageName;
+		_versionString = (_version = _entryAssembly.GetName().Version ?? new Version(1, 0)).ToString();
+		_buildString = _entryAssembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>()?.InformationalVersion ?? _versionString;
+	}
+
+	private string GetGnomeColorScheme()
+	{
+		try
+		{
+			using Process process = Process.Start(new ProcessStartInfo
+			{
+				FileName = "gsettings",
+				Arguments = "get org.gnome.desktop.interface color-scheme",
+				UseShellExecute = false,
+				RedirectStandardOutput = true,
+				CreateNoWindow = true
+			});
+			if (process != null)
+			{
+				string text = process.StandardOutput.ReadToEnd();
+				process.WaitForExit(1000);
+				return text.Trim().Trim('\'');
+			}
+		}
+		catch
+		{
+		}
+		return "";
+	}
+
+	public void ShowSettingsUI()
+	{
+		try
+		{
+			Process.Start(new ProcessStartInfo
+			{
+				FileName = "gnome-control-center",
+				UseShellExecute = true
+			});
+		}
+		catch
+		{
+			try
+			{
+				Process.Start(new ProcessStartInfo
+				{
+					FileName = "xdg-open",
+					Arguments = "x-settings:",
+					UseShellExecute = true
+				});
+			}
+			catch
+			{
+			}
+		}
+	}
+}