prefer modern React patterns

Favor modern React patterns over legacy approaches to improve code maintainability and prepare for future React upgrades. Use functional components with hooks instead of class components, and prefer React.useContext over the <Context.Consumer> render prop pattern to reduce JSX nesting and improve readability.

Legacy patterns like contextTypes can become blockers when upgrading React versions, so migrating to modern alternatives should be prioritized. When refactoring, replace class component instance variables with useRef for mutable references.

Example transformation:

// Instead of this legacy pattern:
<Consumer>
  {ctx => (
    <div>{/* component content */}</div>
  )}
</Consumer>

// Use this modern approach:
const ctx = useContext(Context);
return <div>{/* component content */}</div>;

Consider adding linter rules to enforce these patterns consistently across the codebase, such as preferring useContext over Consumer components.