Method onComplete

src/tutorial/tutorialOverlay.js:183–196

* Handle tutorial completion

()

   * Handle tutorial completion
   */
  onComplete() {
    this.hide();

    // Show completion message
    const message = document.createElement('div');
    message.className = 'tutorial-complete-toast';
    message.textContent = '✓ Tutorial completed! Keep experimenting.';
    document.body.appendChild(message);

    setTimeout(() => {
      message.style.opacity = '0';
      setTimeout(() => message.remove(), 300);
    }, 3000);
  }

  /**
   * Show overlay