Box the optional exact State menu target to bound message size

crates/oa-desktop/src/app/state_multiselect_tests.rs

@@ -1016,7 +1016,7 @@ async fn state_actions_trigger_captures_exact_row_without_owner_placement_and_st
         };
         assert_eq!(request.object, relation);
         assert_eq!(request.placement, None);
-        assert_eq!(request.selection_target, Some(row.clone()));
+        assert_eq!(request.selection_target.as_deref(), Some(&row));
         assert_eq!(request.canvas, f.app.state_context());
         let mut wrong = request.clone();
         wrong.placement = Some(f.a);
@@ -1028,7 +1028,7 @@ async fn state_actions_trigger_captures_exact_row_without_owner_placement_and_st
             .app
             .update(Message::Menu(MenuEvent::Open(request.clone())));
         let opened = f.app.model_menu.as_ref().unwrap();
-        assert_eq!(opened.request.selection_target, Some(row.clone()));
+        assert_eq!(opened.request.selection_target.as_deref(), Some(&row));
         assert_eq!(opened.request.placement, None);
         assert_eq!(
             f.app.multiselect_snapshot().unwrap().targets(),
@@ -1080,10 +1080,10 @@ async fn state_actions_trigger_captures_exact_row_without_owner_placement_and_st
             model_menu::Opened::new(&f.app, stale_row.clone(), 2).is_none(),
             "a fresh envelope cannot rebind the old row occurrence"
         );
-        stale_row.selection_target = Some(Target::StateRow {
+        stale_row.selection_target = Some(Box::new(Target::StateRow {
             placement: f.b,
             relation,
-        });
+        }));
         assert!(
             model_menu::Opened::new(&f.app, stale_row, 2).is_some(),
             "the replacement occurrence is independently visible"