Set up Google OAuth with next-auth and prepared for user table creation

package.json

@@ -16,6 +16,7 @@
     "gsap": "^3.14.2",
     "lucide-react": "^0.575.0",
     "next": "16.1.6",
+    "next-auth": "^4.24.13",
     "pg": "^8.18.0",
     "react": "19.2.3",
     "react-dom": "19.2.3"

pages/api/auth/[...nextauth].js

@@ -0,0 +1,17 @@
+import NextAuth from 'next-auth';
+import GoogleProvider from 'next-auth/providers/google';
+
+export default NextAuth({
+  providers: [
+    GoogleProvider({
+      clientId: process.env.GOOGLE_CLIENT_ID,
+      clientSecret: process.env.GOOGLE_CLIENT_SECRET,
+    }),
+  ],
+  callbacks: {
+    async session({ session, token }) {
+      session.user.id = token.sub;
+      return session;
+    },
+  },
+});