Sketch free-form curves: Ellipse (centre, major axis end, minor radius), Fit Point and Control Point (degree 3 and 5) Splines, Conic Curve (rho); solved like other curves (points on them, tangency at shared ends, drag fit points), profiled as polylines; mirror/pattern/move/scale copy them; Tangent Arc continues splines and conics

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AS5Tn3xieewUSg3uxrMVdL

crates/sketch/src/profiles.rs

@@ -128,6 +128,14 @@ pub fn find_profiles(sk: &Sketch) -> Vec<Profile> {
                     shapes.push((ci, Shape::Round { c: center, r: radius, start, sweep }));
                 }
             }
+            // Free-form curves take part as their polylines.
+            _ => {
+                for s in sk.segs(ci) {
+                    if let Seg2::Line { a, b } = s {
+                        shapes.push((ci, Shape::Line { a, b }));
+                    }
+                }
+            }
         }
         if shapes.len() > MAX_EDGES {
             break;