doc: ack

README.md

@@ -222,6 +222,8 @@ For downstream applications, please refer to our document about [API Details](./
 
 - Document extraction: [MinerU](https://github.com/opendatalab/MinerU)
 
+- Document Preview: [Gradio PDF](https://github.com/freddyaboulton/gradio-pdf)
+
 - Multi-threaded translation: [MathTranslate](https://github.com/SUSYUSTC/MathTranslate)
 
 - Layout parsing: [DocLayout-YOLO](https://github.com/opendatalab/DocLayout-YOLO)

docs/README_ja-JP.md

@@ -332,6 +332,8 @@ curl http://localhost:11008/v1/translate/d9894125-2f4e-45ea-9d93-1a9068d2045a -X
 
 - ドキュメントの抽出：[MinerU](https://github.com/opendatalab/MinerU)
 
+- ドキュメントプレビュー：[Gradio PDF](https://github.com/freddyaboulton/gradio-pdf)
+
 - マルチスレッド翻訳：[MathTranslate](https://github.com/SUSYUSTC/MathTranslate)
 
 - レイアウト解析：[DocLayout-YOLO](https://github.com/opendatalab/DocLayout-YOLO)

docs/README_zh-CN.md

@@ -333,6 +333,8 @@ curl http://localhost:11008/v1/translate/d9894125-2f4e-45ea-9d93-1a9068d2045a -X
 
 - 文档提取：[MinerU](https://github.com/opendatalab/MinerU)
 
+- 文档预览：[Gradio PDF](https://github.com/freddyaboulton/gradio-pdf)
+
 - 多线程翻译：[MathTranslate](https://github.com/SUSYUSTC/MathTranslate)
 
 - 布局解析：[DocLayout-YOLO](https://github.com/opendatalab/DocLayout-YOLO)