feat: add 3D printing support for abacus models
Add comprehensive 3D printing capabilities for generating custom
abacus models in STL format:
- OpenSCAD integration in Docker container
- API endpoint: POST /api/abacus/generate-stl
- Background job processing with status monitoring
- STL file preview with Three.js
- Interactive abacus customization page at /create/abacus
- Configurable parameters: columns, bead shapes, dimensions, colors
- Export formats: STL (for 3D printing), SCAD (for editing)
Components:
- STLPreview: Real-time 3D model viewer
- JobMonitor: Background job status tracking
- AbacusCustomizer: Interactive configuration UI
Docker: Add OpenSCAD and necessary 3D printing tools
Dependencies: Add three, @react-three/fiber, @react-three/drei
Generated models stored in public/3d-models/
Documentation: 3D_PRINTING_DOCKER.md
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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