Fix #1252: Feedback for “AutoBE > browser doesn't find playground”

[JiwaniZakir]

Closes #1252

Before

README.md referenced the playground at http://localhost:5713 in two places, causing users to open a URL where no server was listening. The Vite dev server binds to 5173 by default, so the browser found nothing at the documented address.

After

Both occurrences of the port in README.md now read 5173:

• The main onboarding paragraph directing users to the chat interface.
• The blockquote pointing to the replay feature at /replay/index.html.

Changes

• README.md line ~43: http://localhost:5713 → http://localhost:5173 (main playground URL)
• README.md line ~55: http://localhost:5713/replay/index.html → http://localhost:5173/replay/index.html (replay feature URL)

Testing

1. Clone the repo and run pnpm run playground.
2. Navigate to http://localhost:5173 — the chat interface loads.
3. Navigate to http://localhost:5173/replay/index.html — the replay viewer loads.
4. Confirmed the old 5713 URLs return connection refused.

---

This PR was created with AI assistance (Claude). The changes were reviewed by quality gates and a critic model before submission.

[samchon]

Thanks for fixing.