chore: fix Msw type

apps/nextjs/.storybook/preview.tsx

@@ -8,7 +8,11 @@ import "@fontsource/lexend/800.css";
 import "@fontsource/lexend/900.css";
 import { OakThemeProvider, oakDefaultTheme } from "@oaknational/oak-components";
 import type { Preview, Decorator } from "@storybook/react";
-import { initialize as initializeMsw, mswLoader } from "msw-storybook-addon";
+import {
+  initialize as initializeMsw,
+  mswLoader,
+  MswParameters,
+} from "msw-storybook-addon";
 
 import { TooltipProvider } from "../src/components/AppComponents/Chat/ui/tooltip";
 import { DialogProvider } from "../src/components/AppComponents/DialogContext";
@@ -19,6 +23,12 @@ import { chromaticParams } from "./chromatic";
 import { RadixThemeDecorator } from "./decorators/RadixThemeDecorator";
 import "./preview.css";
 
+declare module "@storybook/csf" {
+  interface Parameters {
+    msw?: MswParameters["msw"];
+  }
+}
+
 initializeMsw();
 
 const preview: Preview = {