message: Implement `Widget::mouse_interaction` for `Slider`
diff: @@ -336,6 +336,24 @@ where
  });
  }
  + fn mouse_interaction(
  + &self,
  + layout: Layout<'_>,
  + _viewport: &Rectangle,
  + cursor_position: Point,
  + ) -> mouse::Interaction {
  + let bounds = layout.bounds();
  + let is_mouse_over = bounds.contains(cursor_position);
  +
  + if self.state.is_dragging {
  + mouse::Interaction::Grabbing
  + } else if is_mouse_over {
  + mouse::Interaction::Grab
  + } else {
  + mouse::Interaction::default()
  + }
  + }
  +
  fn hash_layout(&self, state: &mut Hasher) {
  struct Marker;
  std::any::TypeId::of::<Marker>().hash(state);
  