Fix dispatcher thread issue in dependency injection

Author: Jack251970

Flow.Launcher/App.xaml.cs

@@ -102,8 +102,8 @@ await Stopwatch.NormalAsync("|App.OnStartup|Startup cost", async () =>
                 await imageLoadertask;
 
                 var mainVM = Ioc.Default.GetRequiredService<MainViewModel>();
+                ((PublicAPIInstance)API).Initialize(mainVM);
                 var window = new MainWindow(_settings, mainVM);
-
                 Log.Info($"|App.OnStartup|Dependencies Info:{ErrorReporting.DependenciesInfo()}");
 
                 Current.MainWindow = window;

Flow.Launcher/PublicAPIInstance.cs

@@ -34,17 +34,22 @@ namespace Flow.Launcher
     public class PublicAPIInstance : IPublicAPI
     {
         private readonly Settings _settings;
-        private readonly MainViewModel _mainVM;
+        private MainViewModel _mainVM;
 
-        #region Constructor
+        #region Constructor & Initialization
 
-        public PublicAPIInstance(Settings settings, MainViewModel mainVM)
+        public PublicAPIInstance(Settings settings)
         {
             _settings = settings;
-            _mainVM = mainVM;
             GlobalHotkey.hookedKeyboardCallback = KListener_hookedKeyboardCallback;
             WebRequest.RegisterPrefix("data", new DataWebRequestFactory());
         }
+        
+        // We must initialize mainVM later to avoid dispatcher thread issue
+        public void Initialize(MainViewModel mainVM)
+        {
+            _mainVM = mainVM;
+        }
 
         #endregion