Extracting business logic with Zustand

When an application becomes more complex, you quickly end up with too much state in components, callbacks passed down in a cascade, and business logic mixed with rendering.

For example, if you're managing a shopping cart in a store, you might have:

• An array of products
• Functions to add, remove, or clear the cart
• Several components that need access to it

To make all of this cleaner and more maintainable, we can extract the business logic into a Zustand store.