forked from 1b-agent/opencadstudio-upstream
PEDIT reworked around a mode machine: - Picking a line/arc asks "Object is not a polyline. Turn it into one? [Yes/No] <Y>" — Yes converts in place (arc keeps its bulge) and editing continues on the result. Pickfirst: an already-selected polyline skips the select step, a selected line/arc goes straight to the convert prompt. - Join gathers with the normal selection system (single picks AND window/crossing boxes) and merges through the JOIN machinery. - Fit replaces every segment with a classic equal-parameter BIARC: two arcs per segment meeting tangentially at an inserted knee, both segments at a vertex sharing that vertex's tangent — the whole run is tangent-continuous (verified: zero tangent jump on L/closed/zigzag/S shapes). Spline resamples the vertex frame as a uniform cubic B-spline (8 samples per span); Decurve straightens every bulge. - Earlier hardening kept: undo snapshot before the mutation, immediate repaint, polyline-only pick validation. - Vertex editing lives on grips, so no Edit-vertex submode; instead the vertex grip hover menu gains Break — a closed polyline opens at the vertex, an open one splits into two (interior vertices only), handled driver-side as an entity replacement. JOIN itself: segs_of now emits one segment per span of an OPEN polyline (bulges kept), so polylines merge with their neighbours — PEDIT Join's set always contains the target polyline and used to abort every time; plain JOIN had the same gap. JOIN also honours pickfirst: launched with two or more objects selected it joins them immediately. Closes #263 Co-Authored-By: Claude Fable 5 <[email protected]>