Added simple sidebar

src/app/(admin)/dashboard/page.tsx

@@ -0,0 +1,16 @@
+import { getSession } from "@/lib/auth/session"
+
+export default async function Dashboard() {
+    const { session, redirect } = await getSession()
+
+    if (!session) {
+        redirect("/sign-in")
+    }
+
+    return (
+        <div className="p-6">
+            <h1 className="text-2xl font-bold text-gray-900 mb-4">Dashboard</h1>
+            <p className="text-gray-600">Welcome to your dashboard! Use the sidebar to navigate to different sections.</p>
+        </div>
+    )
+}