Next.js Optimization & Feature Upgrade

I recently migrated my simple HTML site on Netlify to a Next.js app on Vercel with a lot of help from AI tools. As a non-coder, I need a seasoned Next.js developer to give the project a professional finish before I hit the “go live” button... (Budget: ₹600 - ₹1500 INR, Jobs: API Development, GitHub, HTML, JavaScript, Next.js, PHP, Vercel, Website Design)