feat: integrate UI components into Search pages with pagination and loading

- Add useDebounce hook for future search optimization
- Integrate LoadingState, ErrorState, RefreshControl, and PaginationLoader into searchResults.tsx
- Add pull-to-refresh functionality with RefreshControl component
- Implement pagination with loadMore and PaginationLoader
- Add error handling with retry functionality using ErrorState
- Update SearchResultsGrid to support refreshControl, onEndReached, and ListFooterComponent props
- Add scroll event handling for pagination trigger
- Add TODO comment in searchWorksResults.tsx for backend API integration
- Reduce initial search limit from 50 to 20 for better performance

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

hooks/index.ts

@@ -6,3 +6,4 @@ export { useTemplateDetail, type TemplateDetail as TemplateDetailType } from './
 export { useTemplateGenerations, type TemplateGeneration } from './use-template-generations'
 export { useSearchHistory } from './use-search-history'
 export { useTags } from './use-tags'
+export { useDebounce } from './use-debounce'