Split Face (FusionSplitFaceCommand): a timeline feature dividing the picked faces where a plane, another body's face (its surface extended) or a sketch's curves meet them, through kernel::split_faces; the solid is unchanged and the pieces take the face's name with #k. Rebase fixes: duplicate Chamfer and Combine specs; the Delete selection's face test expects Delete Face's refusal

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

crates/doc/src/clipboard.rs

@@ -40,6 +40,12 @@ impl FeatureKind {
             FeatureKind::Sketch { plane, .. } | FeatureKind::ConstructionPlane { plane } | FeatureKind::Split { plane, .. } => {
                 plane_names(plane, names)
             }
+            FeatureKind::SplitFace { plane, sketch, .. } => {
+                plane_names(plane, names);
+                if let Some(s) = sketch {
+                    sk(s);
+                }
+            }
             FeatureKind::Extrude { sketch, .. }
             | FeatureKind::Revolve { sketch, .. }
             | FeatureKind::Emboss { sketch, .. }