Title:

Fix iframe 3D traces rendering issue

Description:

This PR addresses issue [#358](https://github.com/tscircuit/runframe/issues/358) where PCB traces were not showing up in the 3D view when rendered via iframe.

✅ Changes Made:

• 🔧 Fixed example9-iframe.fixture.tsx to correctly render traces by updating the trace syntax and verifying circuit JSON generation.
• 🗑️ Removed .gitpod.yml as per bounty requirements.
• 📸 Screenshot showing correct trace rendering in the iframe preview:


🧪 Testing Process:

• Ran bun run build:site and bun run build:iframe
• Served locally with bun run serve:cosmos
• Verified traces rendered in the iframe preview (example9)

Screenshot #1

💰 Bounty Claim:

/claim #358