Next 13 🆙

Update to nextJs 13 🆙

The issue is to update the project to Next.js 13. First, check the current Next.js version in package.json and review the Next.js 13 migration guide. Look for breaking changes, especially around the app directory, routing, and data fetching. Test the upgrade locally to identify any compatibility issues with existing dependencies like Supabase and Mintbase.

索引モデルが issue の本文から書いたものです。