Added parameter MacOSShowInDock to control whether MacOS platform app is displayed in the Dock

https://github.com/2dust/v2rayN/issues/7465

v2rayN/ServiceLib/Models/ConfigItems.cs

@@ -105,6 +105,7 @@ public class UIItem
     public bool Hide2TrayWhenClose { get; set; }
     public List<ColumnItem> MainColumnItem { get; set; }
     public bool ShowInTaskbar { get; set; }
+    public bool MacOSShowInDock { get; set; }
 }
 
 [Serializable]

v2rayN/v2rayN.Desktop/App.axaml.cs

@@ -11,11 +11,6 @@ public partial class App : Application
 {
     public override void Initialize()
     {
-        if (!AppHandler.Instance.InitApp())
-        {
-            Environment.Exit(0);
-            return;
-        }
         AvaloniaXamlLoader.Load(this);
 
         AppDomain.CurrentDomain.UnhandledException += CurrentDomain_UnhandledException;

v2rayN/v2rayN.Desktop/Program.cs

@@ -14,13 +14,17 @@ internal class Program
     [STAThread]
     public static void Main(string[] args)
     {
-        OnStartup(args);
+        if (OnStartup(args) == false)
+        {
+            Environment.Exit(0);
+            return;
+        }
 
         BuildAvaloniaApp()
             .StartWithClassicDesktopLifetime(args);
     }
 
-    private static void OnStartup(string[]? Args)
+    private static bool OnStartup(string[]? Args)
     {
         if (Utils.IsWindows())
         {
@@ -30,8 +34,7 @@ internal class Program
             if (!rebootas && !bCreatedNew)
             {
                 ProgramStarted.Set();
-                Environment.Exit(0);
-                return;
+                return false;
             }
         }
         else
@@ -39,19 +42,30 @@ internal class Program
             _ = new Mutex(true, "v2rayN", out var bOnlyOneInstance);
             if (!bOnlyOneInstance)
             {
-                Environment.Exit(0);
-                return;
+                return false;
             }
         }
+
+        if (!AppHandler.Instance.InitApp())
+        {
+            return false;
+        }
+        return true;
     }
 
     // Avalonia configuration, don't remove; also used by visual designer.
     public static AppBuilder BuildAvaloniaApp()
-    => AppBuilder.Configure<App>()
-        .UsePlatformDetect()
-        //.WithInterFont()
-        .WithFontByDefault()
-        .LogToTrace()
-        .UseReactiveUI()
-        .With(new MacOSPlatformOptions { ShowInDock = false });
+    {
+        return AppBuilder.Configure<App>()
+            .UsePlatformDetect()
+            //.WithInterFont()
+            .WithFontByDefault()
+            .LogToTrace()
+#if OS_OSX
+            .UseReactiveUI()
+            .With(new MacOSPlatformOptions { ShowInDock = AppHandler.Instance.Config.UiItem.MacOSShowInDock });
+#else
+            .UseReactiveUI();
+#endif
+    }
 }