SolidWorks DXF exports don't include the ACAD_GROUP entry in the Named
Object Dictionary. Without it, AutoCAD reports "GroupTable dictionary was
not defined in NamedObject dictionary" when opening the file.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Replace vendored netDxf git submodule with ACadSharp NuGet package
(v3.1.32). This aligns the DXF dependency with the parent project.
API migration: DxfDocument→CadDocument, Vector3→XYZ, Vector2→XY,
MText.Position→MText.InsertPoint, Line.Linetype→Line.LineType,
DxfDocument.Load()→DxfReader, doc.Save()→DxfWriter.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Fix GetEtchLines() using yield break instead of return lines, which
caused all etch lines to be silently discarded
- Support BEND LINES and BENDLINES layer names in addition to BEND
- Move all bend lines to BEND layer before processing
- Migrate csproj from .NET Framework 4.8 to SDK-style net8.0-windows
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
