feat: bundle action with ncc and add E2E workflow

[DeDuckProject]

Summary

• Bundles packages/action with @vercel/ncc into a self-contained dist/index.js — no pnpm install needed in CI
• Adds examples/simple-app (plain-JS server, zero build step) as the E2E test target
• Replaces the old broken demo.yml with a real E2E workflow that starts the example app, installs Playwright Chromium, and invokes ./packages/action locally

Test plan

• Workflow triggers on this PR (pull_request event)
• Example app starts on port 3000 and passes the readiness check
• Action runs the full pipeline (diff → LLM → Playwright → GIF)
• PR receives a bot comment with <!-- git-glimpse-demo --> marker containing a GIF or screenshot fallback
• Action outputs (recording-url, comment-url, success) are populated in the workflow logs

🤖 Generated with Claude Code

[github-actions]

🎬 UI Demo Preview

Changes detected in: .github/workflows/demo.yml, .gitignore, examples/simple-app/git-glimpse.config.ts, examples/simple-app/package.json, examples/simple-app/server.js (+11 more)

What changed: A new example 'Product Page' web app has been added, featuring a wireless headphones listing with an Add to Cart counter and a Virtual Try-On modal. This serves as the live demo target for the GitGlimpse end-to-end workflow.

Demo script (auto-generated)

import type { Page } from '@playwright/test';

export async function demo(page: Page): Promise<void> {
  await page.setViewportSize({ width: 1280, height: 720 });

  // Navigate to the home page
  await page.goto('http://localhost:3000');
  await page.waitForLoadState('networkidle');
  await page.waitForTimeout(1500);

  // Show the product page with the Wireless Headphones card
  await page.waitForSelector('text=Wireless Headphones');
  await page.waitForTimeout(1000);

  // Click 'Add to Cart' several times to show the counter incrementing
  const addToCartButton = page.locator('button', { hasText: 'Add to Cart' });

  await addToCartButton.click();
  await page.waitForTimeout(700);

  await addToCartButton.click();
  await page.waitForTimeout(700);

  await addToCartButton.click();
  await page.waitForTimeout(1000);

  // Pause to show the counter at 3
  await page.waitForTimeout(1500);

  // Click the green 'Virtual Try-On' button to open the modal overlay
  const tryOnButton = page.locator('button', { hasText: 'Virtual Try-On' });
  await tryOnButton.click();
  await page.waitForTimeout(1500);

  // Modal should now be visible
  await page.waitForSelector('text=See how these headphones look on you');
  await page.waitForTimeout(1500);

  // Close the modal using the X button
  const closeButton = page.locator('button[aria-label="Close"]');
  await closeButton.click();
  await page.waitForTimeout(1500);

  // Final pause on the product page
  await page.waitForTimeout(1000);
}

---

Generated by git-glimpse