3db30339b5
Add OWL field widget (fp_3d_preview) that renders uploaded STL files in an interactive 3D viewport: - Three.js r170 ESM loaded lazily via dynamic import with importmap - STLLoader + OrbitControls for full model interaction - Fallback binary STL parser when addon import fails - Toolbar with wireframe toggle and camera reset - Vertex/face count display - Theme-aware SCSS using CSS custom properties and $border-color - Registered on model_attachment_id in the Part Catalog form Vendored libs: three.module.min.js (691KB), STLLoader.js, OrbitControls.js Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>