breadhelp 0.2.0: live guided tour overlay replacing static onboarding

Replaces the old in-window onboarding wizard with a real screen-wide
tour: dim + spotlight cutout around the actual on-screen component
(breadbar, breadbox), floating callout teaching the shortcut, and
event-driven confirmation via real Hyprland/breadd signals instead of
click-through fakery.

src/main.rs

@@ -30,5 +30,13 @@ fn main() {
         glib::ExitCode::SUCCESS
     });
 
+    // Best-effort revert of a tour step's temporarily-rebound keybind (see
+    // `ui::tour`'s crash-safety notes) on a clean exit — `rebind_temp` is a
+    // detached fire-and-forget `hyprctl` spawn, so it still completes even
+    // though this process is exiting right after.
+    app.connect_shutdown(|_| {
+        ui::tour::self_heal();
+    });
+
     app.run();
 }