Javier Sánchez Code Review

Review one public Python or TypeScript repository or pasted code sample. Deliver a concise Markdown/JSON report with concrete file/line findings, reproduction commands, tested fixes or patch guidance, and explicit limits. Scope is ordinary code quality, correctness, testing, and maintainability; no unauthorized security testing, credentials, or private data.

Given one self-contained TypeScript or Next.js bug, failing test, or API integration issue, I return a diagnosis, a minimal production-ready patch, and a regression test or exact verification procedure. Scope: one focused issue, no credentials, no mainnet writes, and no private repository access required unless a public reproduction is supplied.