Files
OrcaSlicer/src/libslic3r
Tommaso BianchiandClaude Opus 4.8 aa2907f730 Design: STEP export of the CAD model
Add an "Export STEP…" button to the Design panel that writes every body to a
.step file as native B-rep (not mesh).

- CadDocument::export_step: compound all bodies (applying their per-body Move
  display transform so the STEP matches what Commit ships) and write via OCCT
  STEPControl_Writer (AsIs). Full error handling incl. OCCT Standard_Failure.
- DesignPanel::on_export_step: bake any open preview, wxFileDialog save, export
  at the displayed body positions, status feedback.

Kernel write path verified with a standalone OCCT box->STEP->readback check
(1 solid, non-null) against the same OCCT build.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BVzKmX6Y1aEteit1HTXG4Q
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