Fix: sketch edit exit (double-click a sketch no longer traps you)

Edit Sketch rolls the timeline back to just after the sketch and faces it;
Finish Sketch, Esc (once nothing else is left to cancel) and editing another
feature all leave it, restoring the marker and the previous view. Editing the
open sketch again is a no-op and editing another sketch switches cleanly.
The control channel's ui.click takes double: true.

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

crates/ui-egui/src/timeline.rs

@@ -199,7 +199,7 @@ pub fn timeline(app: &mut SolveApp, ui: &mut egui::Ui) {
                 if let Some(sk) = sketch_of
                     && ui.button("Edit Profile Sketch").clicked()
                 {
-                    let _ = app.run("SketchActivate", json!({ "sketch": sk }));
+                    app.edit_sketch(sk);
                     ui.close();
                 }
                 if ui.button("Rename").clicked() {