Expert integration of Supabase Auth with Next.js App Router Use when: supabase auth next, authentication next.js, login supabase, auth middleware, protected route.

Supabase 身份验证与 Next.js 应用路由的高级集成 适用场景：supabase 身份验证 next、Next.js 身份验证、Supabase 登录、认证中间件、受保护路由