Adds the dual-brain holographic panel back into app.js as a
self-contained createDualBrainPanel() function:
- Canvas-rendered scorecard sprite at position (10, 3, -8)
- Cloud and Local brain orbs with gentle float animation
- Scan-line overlay animated each frame via CanvasTexture
- Point lights for each brain orb and the main panel
Fixes#481
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>