GeometrySimplifier/ArcFit now fit arcs that pass exactly through run
endpoints while balancing tangency error between trusted and estimated
directions, fixing arcs that previously bulged or broke tangent
continuity at fillet/compound-curve junctions.
GravographIS post processor gains per-layer (engrave/cut) tool passes
via a new GravographISPostConfig, so ENGRAVE/ETCH-tagged geometry runs
as a separate scribe pass with its own feed/depth and an operator
pause before the cut pass (spring-floated spindle needs a tool swap).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add ArcFit.FitWithDualTangent to constrain replacement arcs to match
tangent directions at both endpoints, preventing kinks without
introducing gaps. Add DXF year selection to CAD converter export.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Move identical FitWithStartTangent and MaxRadialDeviation methods
to a shared ArcFit class, eliminating 40-line duplicate.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>