chore: add PR body file

Author: roomote

pr-body.md

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+## Summary
+
+This PR refactors the HuggingFace provider implementation to match the established pattern used by other providers that fetch models via network calls (e.g., OpenRouter, Glama, Ollama).
+
+## Changes
+
+- **Moved fetcher to correct location**: Moved `huggingface-models.ts` from `src/services/` to `src/api/providers/fetchers/huggingface.ts`
+- **Updated fetcher to return ModelInfo**: The fetcher now returns `Record<string, ModelInfo>` instead of raw HuggingFace model data, consistent with other providers
+- **Integrated with model cache**: Added HuggingFace to `RouterName` type and integrated it with the `modelCache.ts` system for memory and file caching
+- **Updated provider to extend RouterProvider**: The HuggingFace provider now extends the `RouterProvider` base class and uses the `fetchModel()` pattern
+- **Removed unnecessary wrapper**: Deleted `src/api/huggingface-models.ts` as it's no longer needed
+- **Updated webview integration**: Modified `webviewMessageHandler.ts` to use the new pattern with `getModels()` while maintaining backward compatibility
+
+## Benefits
+
+1. **Consistency**: HuggingFace now follows the same pattern as other providers
+2. **Caching**: Model lists are now cached in memory and on disk
+3. **Maintainability**: Easier to understand and modify when all providers follow the same pattern
+4. **Type safety**: Better integration with TypeScript types
+
+## Testing
+
+- ✅ All existing tests pass
+- ✅ TypeScript compilation successful
+- ✅ Linting checks pass
+- ✅ Added HuggingFace to RouterModels mock in webview tests