Fix params/searchParams types for Next.js app router

app/(payload)/layout.tsx

@@ -0,0 +1,23 @@
+import { RootLayout, handleServerFunctions } from '@payloadcms/next/layouts';
+import type { ServerFunctionClient } from 'payload';
+import React from 'react';
+import config from '../../payload.config';
+import { importMap } from './gestion59/importMap';
+
+export default function AdminLayout({ children }: { children: React.ReactNode }) {
+  const serverFunction: ServerFunctionClient = async (args) => {
+    'use server';
+    return handleServerFunctions({
+      ...args,
+      config,
+      importMap,
+    });
+  };
+
+  return RootLayout({
+    config,
+    importMap,
+    serverFunction,
+    children,
+  });
+}