Add static frontend demo page

[luaroncrew]

Summary

• add a static demo page under frontend-v3 for showcasing existing VibeTrader outputs
• reuse committed comparison images and PnL artifact for a stable frontend walkthrough
• record and deliver a short frontend demo video from the hosted preview

Test plan

• serve the repo via python http.server on port 8930
• open /frontend-v3/demo.html in Chrome
• verify chart filter buttons, card selection, next/previous navigation, and PnL section render correctly

---

[luaroncrew]

Task Deliverables

Generated by Ascii

---

Recorded a frontend demo for VibeTrader by adding a lightweight static showcase page that reuses committed comparison images and backtest artifacts.

graph LR
  A[Repo output artifacts] --> B[frontend-v3/demo.html]
  B --> C[Static HTTP preview]
  C --> D[Recorded demo video]

Loading

Artifacts delivered:

• Hosted preview for the static demo page
• MP4 walkthrough showing filters, chart selection, and P&L section
• PR with the demo page committed

---

Live Previews

• Demo: Open preview

---

Demo Videos

• Watch demo video (19s)

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 2 additional findings.