fix: improve app restart after update

internal/services/updater/updater.go

@@ -187,12 +187,27 @@ func (u *Updater) DownloadAndInstall(progressCallback func(float64)) error {
 func (u *Updater) RestartApp() error {
 	destPath := filepath.Join(InstallPath, AppName)
 
-	// Launch new app
-	cmd := exec.Command("open", destPath)
+	// Use shell to launch new app after this process exits
+	// The sleep ensures the current app has time to exit
+	script := fmt.Sprintf(`sleep 1 && open "%s"`, destPath)
+	cmd := exec.Command("sh", "-c", script)
+	cmd.Stdout = nil
+	cmd.Stderr = nil
+	cmd.Stdin = nil
+
+	// Detach the process so it continues after we exit
 	if err := cmd.Start(); err != nil {
 		return fmt.Errorf("failed to launch updated app: %w", err)
 	}
 
+	// Release the process so it doesn't become a zombie
+	go func() {
+		_ = cmd.Wait()
+	}()
+
+	// Give the shell time to start
+	time.Sleep(100 * time.Millisecond)
+
 	// Exit current app
 	os.Exit(0)
 	return nil