fix(display): ensure backends are registered before create

engine/display/__init__.py

@@ -80,6 +80,7 @@ class DisplayRegistry:
     @classmethod
     def create(cls, name: str, **kwargs) -> Display | None:
         """Create a display instance by name."""
+        cls.initialize()
         backend_class = cls.get(name)
         if backend_class:
             return backend_class(**kwargs)