Method constructor

src/tutorial/tutorialOverlay.js:8–16

(tutorialManager, applyCode)

export class TutorialOverlay {
  constructor(tutorialManager, applyCode) {
    this.manager = tutorialManager;
    this.applyCode = applyCode;
    this.element = null;
    this.visible = false;

    this.createOverlay();
    this.setupEventListeners();
  }

  /**
   * Create overlay DOM structure