Sharing Types Between Frontend & Backend

Summary

Defining your data models once (e.g. in a shared package or monorepo) so frontend and backend can't silently drift apart on what a `User` object actually looks like.

• 1Set up a shared `types` folder or package used by both your frontend and backend.
• 2Change a shared type and confirm both codebases immediately show the resulting type errors.
• 3Learn how monorepo tools (Turborepo, Nx) make this pattern practical at scale.