- Extract cleanup logic to src/core/cleanup.ts
- Extract XR setup to src/core/xrSetup.ts
- Extract scene/physics/audio setup to src/core/sceneSetup.ts
- Remove unused GameState enum and _gameState field
- main.ts reduced from 192 to 91 lines
- All methods now under 20 lines
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
