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Fix Expo EAS builds, submit flows, preview builds, production releases, and mobile deployment failures.

Implement and debug JWT login, access tokens, refresh tokens, guards, middleware, and authorization headers.

Implement and debug Google OAuth login, callback routes, Auth.js or NextAuth providers, scopes, and account linking.

Debug Prisma schemas, migrations, generated client issues, relations, transactions, and slow ORM queries.

Add and debug Redis caching, TTLs, sessions, queues, rate limits, and cache invalidation.

Replace this with the specific task capability this skill helps with.

Fix Next.js and Vercel deployment failures, environment issues, build output problems, and production routing regressions.