Signing, Installer, New Workflows

flutter_app/lib/main.dart

@@ -38,6 +38,9 @@ Future<void> main() async {
     windowManager.waitUntilReadyToShow(windowOptions, () async {
       await windowManager.show();
       await windowManager.focus();
+      
+      // Initialize window service after window is ready
+      // Context will be set later from the home screen
     });
   }