feat: Implement Next.js middleware for authentication and add a new API endpoint to fetch user details.

src/app/api/user/route.ts

@@ -2,6 +2,9 @@ import { NextRequest, NextResponse } from 'next/server';
 import { cookies } from 'next/headers';
 import { db } from '@/lib/db';
 
+// Force dynamic rendering (required for cookies)
+export const dynamic = 'force-dynamic';
+
 /**
  * GET /api/user
  * Get current user information