[v2] Fix OnShutdown for production build

v2/internal/appng/app_production.go

@@ -35,6 +35,9 @@ type App struct {
 
 func (a *App) Run() error {
 	err := a.frontend.Run(a.ctx)
+	if a.shutdownCallback != nil {
+		a.shutdownCallback(a.ctx)
+	}
 	return err
 }
 

v2/internal/frontend/desktop/darwin/frontend.go

@@ -214,9 +214,6 @@ func (f *Frontend) WindowSetRGBA(col *options.RGBA) {
 
 func (f *Frontend) Quit() {
 	f.mainWindow.Quit()
-	if f.frontendOptions.OnShutdown != nil {
-		f.frontendOptions.OnShutdown(f.ctx)
-	}
 }
 
 type EventNotify struct {