Add scoped overlay hosts

tabs-ui/src/lib.rs

@@ -5,7 +5,7 @@ pub struct ClientWidgets {
     pub info: WeakWidget<Text>,
 }
 
-pub fn build<Rsc: HasEvents>(rsc: &mut Rsc, ui_state: &mut impl HasRoot) -> ClientWidgets
+pub fn build<Rsc: HasEvents>(rsc: &mut Rsc, ui_state: &mut impl HasRoot<Rsc>) -> ClientWidgets
 where
     Rsc::State: FocusHost,
 {