Scale motion axes with mesh extent

Use gray background for auto-kinematics renders

Restore joint-type colors for exported axes

Align exported part colors with kinematic node palette

Fix negative up direction for auto-kinematics render

Preserve materials in URDF export

Clean unused demo logic

Fix auto-kinematics Blender PIL dependency

Cleanup demo code paths

Promote inference helpers to public API

Cleanup unused app code and styles

Prefetch inference assets at startup

Render auto kinematics views through local temp dir

Use positive auto kinematics render elevation

Render auto kinematics with selected upright orientation

Fix Blender preview and PartField checkpoint loading on Space

Deploy Instruct Particulate Gradio demo