When entering immersive mode, toolbox and input text view now position
themselves relative to the user's initial camera position:
- Toolbox: 0.5m ahead, 0.5m below, 0.2m to the left
- Input text view: 0.5m ahead, 0.5m below (centered)
Uses camera world Y position to ensure vertical offset is consistent
regardless of head pitch/tilt when entering XR.
Also added CLAUDE.md documentation for the codebase.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
