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A React hook stub that provides subcategory count data for a specific category. This is a placeholder implementation that returns mock data while the actual backend integration is being developed.

## Key Components

- **`useSubcategoryCountByCategory`** - Hook function that accepts a category ID and returns count data with loading and error states

## Usage Example

```typescript
import { useSubcategoryCountByCategory } from './use-subcategory-count';

function CategoryCard({ categoryId }: { categoryId: string }) {
  const { data: subcategoryCount, isLoading, error } = useSubcategoryCountByCategory(categoryId);

  if (isLoading) return <div>Loading...</div>;
  if (error) return <div>Error loading subcategories</div>;

  return (
    <div>
      <h3>Category</h3>
      <p>{subcategoryCount} subcategories</p>
    </div>
  );
}
```

The hook currently returns hardcoded values (count: 0, loading: false, error: null) and should be replaced with actual API integration when the backend endpoints are available.