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This file provides stub React hooks for API data fetching, offering consistent interfaces for loading states and error handling across different data types without actual API implementation.

## Key Components

- **`useCategories()`** - Hook for fetching and managing category data with loading/error states
- **`useVendors()`** - Hook for fetching and managing vendor data with loading/error states  
- **`useAnnouncements()`** - Hook for fetching announcement data with loading state
- **`useSubcategoryCountByCategory()`** - Hook that returns empty subcategory count data

## Usage Example

```typescript
import { useCategories, useVendors, useAnnouncements } from './api-hooks';

function MyComponent() {
  const { categories, loading: categoriesLoading, error: categoriesError } = useCategories();
  const { vendors, loading: vendorsLoading, error: vendorsError } = useVendors();
  const { announcements, loading: announcementsLoading } = useAnnouncements();

  if (categoriesLoading || vendorsLoading) {
    return <div>Loading...</div>;
  }

  if (categoriesError || vendorsError) {
    return <div>Error loading data</div>;
  }

  return (
    <div>
      <h2>Categories: {categories.length}</h2>
      <h2>Vendors: {vendors.length}</h2>
      <h2>Announcements: {announcements.length}</h2>
    </div>
  );
}
```

These hooks currently return empty arrays and default states, serving as placeholders for future API integration while maintaining the expected interface for components that consume them.