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/ui-egui/src/sketch_tools.rs

@@ -147,6 +147,16 @@ pub fn refine_snap(
     })
 }
 
+/// The constraint glyph under a screen position (its constraint id).
+pub fn glyph_at(pos: Pos2) -> Option<String> {
+    GLYPHS.with(|g| g.borrow().iter().find(|(_, c)| c.distance(pos) <= 7.0).map(|(id, _)| id.clone()))
+}
+
+/// Constraint glyphs drawn last frame: (constraint id, screen centre).
+pub fn glyph_positions() -> Vec<(String, Pos2)> {
+    GLYPHS.with(|g| g.borrow().clone())
+}
+
 /// A click on a constraint glyph selects it (true: the click was used).
 pub fn click_glyph(app: &mut SolveApp, _proj: &Proj, pos: Pos2) -> bool {
     if app.session.active_sketch.is_none() {
@@ -731,7 +741,8 @@ fn glyphs(app: &SolveApp, painter: &egui::Painter, proj: &Proj) {
         }
         placed.push(sp);
         let failing = ss.report.failing.contains(&c.id);
-        let selected = picked.as_deref() == Some(c.id.as_str());
+        let selected = picked.as_deref() == Some(c.id.as_str())
+            || app.session.selection.iter().any(|s| matches!(s, solvecraft_engine::Sel::SketchConstraint { id } if *id == c.id));
         let col = if failing {
             tk.error
         } else if selected {