Automatically focus the mega query on open

Author: GabrielDuf

src/UniGetUI.Avalonia/Views/SoftwarePages/AbstractPackagesPage.axaml.cs

@@ -3,6 +3,7 @@
 using Avalonia.Controls.ApplicationLifetimes;
 using Avalonia.Input;
 using Avalonia.Input.Platform;
+using Avalonia.Threading;
 using UniGetUI.Avalonia.ViewModels.Pages;
 using UniGetUI.Avalonia.Views.Controls;
 using UniGetUI.Core.Tools;
@@ -86,7 +87,13 @@ or nameof(PackagesPageViewModel.SortAscending))
     // ─── UI-only: focus the package list ─────────────────────────────────────
     private void OnFocusListRequested() => PackageList.Focus();
 
-    public void FocusPackageList() => ViewModel.RequestFocusList();
+    public void FocusPackageList()
+    {
+        if (ViewModel.MegaQueryBoxEnabled)
+            Dispatcher.UIThread.Post(() => MegaQueryBlock.Focus(), DispatcherPriority.Background);
+        else
+            ViewModel.RequestFocusList();
+    }
     public void FilterPackages() => ViewModel.FilterPackages();
 
     // ─── Abstract: let concrete pages add toolbar items ───────────────────────

src/UniGetUI/Pages/SoftwarePages/AbstractPackagesPage.xaml.cs

@@ -1294,7 +1294,14 @@ protected void PerformMainPackageAction(IPackage? package)
             }
         }
 
-        public void FocusPackageList() => CurrentPackageList.Focus(FocusState.Programmatic);
+        public void FocusPackageList()
+        {
+            if (MEGA_QUERY_BOX_ENABLED)
+                DispatcherQueue.TryEnqueue(DispatcherQueuePriority.Low,
+                    () => MegaQueryBlock.Focus(FocusState.Programmatic));
+            else
+                CurrentPackageList.Focus(FocusState.Programmatic);
+        }
 
         public async Task ShowContextMenu(PackageWrapper wrapper)
         {