Design Pattern: The 'Container/Presenter' (Smart/Dumb) Pattern in Vue 3

This pattern separates data fetching/business logic (Container) from the visual representation (Presenter).

In large apps, components often become bloated with API calls and state management. The Container component (Smart) handles Pinia stores, API requests, and logic, then passes pure data down to the Presenter (Dumb) via props. The Presenter emits events back up. This makes Presenters highly reusable and easy to test with tools like Storybook, as they have no external dependencies.