Add FocusQueryTextBox method to set focus on the query text box in MainWindow

Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs

@@ -89,6 +89,11 @@ namespace Flow.Launcher.Plugin
         /// </summary>
         void ShowMainWindow();
         
+        /// <summary>
+        /// Focus the query text box in the main window
+        /// </summary>
+        void FocusQueryTextBox();
+
         /// <summary>
         /// Hide MainWindow
         /// </summary>

Flow.Launcher/PublicAPIInstance.cs

@@ -33,6 +33,7 @@ using JetBrains.Annotations;
 using Squirrel;
 using Stopwatch = Flow.Launcher.Infrastructure.Stopwatch;
 using System.ComponentModel;
+using System.Windows.Input;
 
 namespace Flow.Launcher
 {
@@ -93,6 +94,18 @@ namespace Flow.Launcher
 
         public void ShowMainWindow() => _mainVM.Show();
         
+        public void FocusQueryTextBox()
+        {
+            Application.Current.Dispatcher.Invoke(new Action(() =>
+            {
+                if (Application.Current.MainWindow is MainWindow mw)
+                {
+                    mw.QueryTextBox.Focus();
+                    Keyboard.Focus(mw.QueryTextBox);
+                }
+            }));
+        }
+
         public void HideMainWindow() => _mainVM.Hide();
 
         public bool IsMainWindowVisible() => _mainVM.MainWindowVisibilityStatus;

Plugins/Flow.Launcher.Plugin.Shell/Main.cs

@@ -378,10 +378,13 @@ namespace Flow.Launcher.Plugin.Shell
 
         private void OnWinRPressed()
         {
+            Context.API.ShowMainWindow();
             // show the main window and set focus to the query box
-            _ = Task.Run(() =>
+            _ = Task.Run(async () =>
             {
-                Context.API.ShowMainWindow();
+                await Task.Delay(50);  // 💡 키보드 이벤트 처리가 끝난 뒤
+                Context.API.FocusQueryTextBox();
+
                 Context.API.ChangeQuery($"{Context.CurrentPluginMetadata.ActionKeywords[0]}{Plugin.Query.TermSeparator}");
             });
         }