Container vs. Presentational: A Component Separation Pattern
Split components into 'smart' containers that handle data and logic, and 'dumb' presentational components that just render UI. This lets you reuse state across different views, like showing a product list in a grid or a table.
Separate components by responsibility: 'smart' containers handle business logic and data fetching, while 'dumb' presentational components just receive data and render UI. This pattern is key for reusability—a container can fetch products and pass that data to either a `ProductGrid` or `ProductTable` component, reusing the fetching logic. The biggest footgun is putting business logic or API calls inside a presentational component, which breaks the separation and makes it hard to reuse or test independently.
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