Add custom tldraw shape and tool for generating 3D renders via Blender:
- BlenderGenShapeUtil.tsx: custom shape with preset selector and controls
- BlenderGenTool.ts: toolbar tool for creating Blender render shapes
- Worker routes for /api/blender/render and /api/blender/status/:jobId
- Proxies requests to Netcup-hosted Blender render server
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
