Selection inside sketches: double-click a curve selects the chain joined to it end to end (sketch.chain; shared or coincident ends), dimensions and constraint glyphs are selectable like other entities (Sel::SketchConstraint: Ctrl/Shift toggle, window and crossing boxes take them, Delete removes them with the rest), boxes leave out the origin, and the selection filter has sketch curves, points, dimensions and constraints

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

crates/engine/src/cmd/sketch_ux_tests.rs

@@ -526,3 +526,41 @@ fn fully_constrained_feedback_is_per_entity() {
     assert!(lines.iter().filter(|l| l.1 == crate::view::colors::SKETCH_FIXED).count() >= 4);
     assert!(lines.iter().any(|l| l.1 == crate::view::colors::SKETCH));
 }
+
+// ---------------------------------------------------------------------------------------------
+// Selection inside sketches
+
+#[test]
+fn chain_follows_shared_and_coincident_ends() {
+    let mut s = new_sketch();
+    run(&mut s, "ShapeRectangleTwoPoint", json!({"p0": [0, 0], "p1": [20, 10]}));
+    run(&mut s, "DrawPolyline", json!({"points": [[40, 0], [50, 0]]}));
+    run(&mut s, "DrawPolyline", json!({"points": [[50.5, 0], [60, 5]]}));
+    run(&mut s, "CircleCenterRadius", json!({"center": [80, 0], "radius": 3}));
+    let chain = |s: &mut Session, c: &str| -> Vec<String> {
+        let v = run(s, "sketch.chain", json!({"curve": c}));
+        v["curves"].as_array().map(|a| a.iter().filter_map(|x| x.as_str().map(str::to_string)).collect()).unwrap_or_default()
+    };
+    assert_eq!(chain(&mut s, "l3"), ["l3", "l1", "l2", "l4"]);
+    assert_eq!(chain(&mut s, "l5"), ["l5"]);
+    assert_eq!(chain(&mut s, "c1"), ["c1"]);
+    // Joined by a coincident constraint, the two lines are one chain.
+    run(&mut s, "ConstraintCoincident", json!({"a": "l5.end", "b": "l6.start"}));
+    assert_eq!(chain(&mut s, "l6"), ["l6", "l5"]);
+    assert!(s.execute("sketch.chain", &json!({"curve": "nope"})).is_err());
+}
+
+#[test]
+fn constraints_and_dimensions_can_be_selected_and_deleted_together() {
+    let mut s = new_sketch();
+    run(&mut s, "DrawPolyline", json!({"points": [[0, 0], [30, 0]]}));
+    run(&mut s, "ConstraintHorizontalVertical", json!({"line": "l1"}));
+    run(&mut s, "SketchDimension", json!({"entities": ["l1"], "value": 30}));
+    let ids: Vec<String> = sketch(&s).constraints.iter().map(|c| c.id.clone()).collect();
+    assert_eq!(ids.len(), 2);
+    let items: Vec<Value> = ids.iter().map(|id| json!({"type": "sketch_constraint", "id": id})).collect();
+    run(&mut s, "select.set", json!({ "items": items }));
+    assert_eq!(s.selection.len(), 2);
+    run(&mut s, "selection.delete", json!({"items": items}));
+    assert!(sketch(&s).constraints.is_empty());
+}