Create a LayoutToggle story

src/room/LayoutToggle.stories.tsx

@@ -0,0 +1,25 @@
+/*
+Copyright 2026 Element Creations Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import { fn } from "storybook/test";
+
+import type { Meta, StoryObj } from "@storybook/react-vite";
+import { LayoutToggle } from "./LayoutToggle";
+
+const meta = {
+  component: LayoutToggle,
+} satisfies Meta<typeof LayoutToggle>;
+
+export default meta;
+type Story = StoryObj<typeof meta>;
+
+export const Default: Story = {
+  args: {
+    layout: "grid",
+    setLayout: fn(),
+  },
+};