Chapter 4 - add layout

app/dashboard/layout.tsx

@@ -0,0 +1,12 @@
+import SideNav from '@/app/ui/dashboard/sidenav';
+
+export default function Layout({ children }: { children: React.ReactNode }) {
+    return (
+        <div className="flex h-screen flex-col md:flex-row md:overflow-hidden">
+            <div className="w-full flex-none md:w-64">
+                <SideNav />
+            </div>
+            <div className="flex-grow p-6 md:overflow-y-auto md:p-12">{children}</div>
+        </div>
+    );
+}