- Fix null reference error in buildColor.ts by initializing metadata.tools array
- Add physics engine availability check in buildRig to prevent PhysicsAggregate creation before engine is ready
- Remove duplicate scene initialization by eliminating redundant initializeEngine() call
- These fixes resolve WebGL shader compilation errors and prevent app crashes
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>
