fix: mpl.interactive should not hang when running as a script (marimo…

…-team#1870)

* fix: mpl.interactive running as a script

* remove log warning

marimo/_plugins/stateless/mpl/_mpl.py

@@ -20,14 +20,15 @@
 from starlette.websockets import WebSocketState
 
 from marimo._output.builder import h
+from marimo._output.formatting import as_html
 from marimo._output.hypertext import Html
 from marimo._output.rich_help import mddoc
 from marimo._runtime.cell_lifecycle_item import CellLifecycleItem
 from marimo._runtime.context import (
-    ContextNotInitializedError,
     RuntimeContext,
     get_context,
 )
+from marimo._runtime.context.kernel_context import KernelRuntimeContext
 from marimo._server.utils import find_free_port
 from marimo._utils.signals import get_signals
 
@@ -259,12 +260,9 @@ def interactive(figure: "Figure | Axes") -> Html:  # type: ignore[name-defined]
     if isinstance(figure, Axes):
         figure = figure.get_figure()
 
-    try:
-        ctx = get_context()
-    except ContextNotInitializedError as err:
-        raise RuntimeError(
-            "marimo.mpl.interactive can't be used when running as a script."
-        ) from err
+    ctx = get_context()
+    if not isinstance(ctx, KernelRuntimeContext):
+        return as_html(figure)
 
     # Figure Manager, Any type because matplotlib doesn't have typings
     figure_manager = new_figure_manager_given_figure(id(figure), figure)