Function load_scene_dispatch 

pub fn load_scene_dispatch(
    project_vfs: Option<&Arc<Mutex<ProjectVfs>>>,
    world: &mut GameWorld,
    editor_state: &Arc<Mutex<EditorState>>,
    abs: &Path,
)

Load dispatch: same shape as save_scene_dispatch. Loads a scene, clearing every entity reference the editor still holds.

The clearing happens here rather than at each call site: loading always repopulates the world with fresh ids, so a caller that forgot would leave a selection naming entities from the previous scene — and once a slot is recycled, naming different ones.