docs: add demo URL and preview & update head (#128)

Author: Moskize91

README.md

@@ -12,26 +12,17 @@
 </div>
 
 
-Translate EPUB books using Large Language Models while preserving the original text. The translated content is displayed side-by-side with the original, creating bilingual books perfect for language learning and cross-reference reading.
+Want to read a book in a foreign language without losing the original context? EPUB Translator transforms any EPUB into a bilingual edition with AI-powered translations displayed side-by-side with the original text.
 
-![Translation Effect](./docs/images/translation.png)
+Whether you're learning a new language, conducting academic research, or simply enjoying foreign literature, you get both versions in one book - preserving all formatting, images, and structure.
 
-## Features
+![Translation Effect](./docs/images/translation.png)
 
-- **Bilingual Output**: Preserves original text alongside translations for easy comparison
-- **LLM-Powered**: Leverages large language models for high-quality, context-aware translations
-- **Format Preservation**: Maintains EPUB structure, styles, images, and formatting
-- **Complete Translation**: Translates chapter content, table of contents, and metadata
-- **Progress Tracking**: Monitor translation progress with built-in callbacks
-- **Flexible LLM Support**: Works with any OpenAI-compatible API endpoint
-- **Caching**: Built-in caching for progress recovery when translation fails
+### Online Demo
 
-## Use Cases
+We provide an [online demo platform](https://hub.oomol.com/package/books-translator) where you can try EPUB Translator's bilingual translation capabilities without any installation. Simply upload your EPUB file and get a translated bilingual edition.
 
-- **Language Learning**: Read books in their original language with side-by-side translations
-- **Academic Research**: Access foreign literature with bilingual references
-- **Content Localization**: Prepare books for international audiences
-- **Cross-Cultural Reading**: Enjoy literature while understanding cultural nuances
+[![EPUB Translator Online Demo](docs/images/online-en.png)](https://hub.oomol.com/package/books-translator)
 
 ## Installation
 

README_zh-CN.md

@@ -7,31 +7,22 @@
     <a href="https://pypi.org/project/epub-translator/" target="_blank"><img src="https://img.shields.io/pypi/pyversions/epub-translator.svg" alt="python versions" /></a>
     <a href="https://github.com/oomol-lab/epub-translator/blob/main/LICENSE" target="_blank"><img src="https://img.shields.io/github/license/oomol-lab/epub-translator" alt="license" /></a>
   </p>
-  <p><a href="https://hub.oomol.com/package/books-translator?open=true" target="_blank"><img src="https://static.oomol.com/assets/button.svg" alt="Open in OOMOL Studio" /></a></p>
+  <p><a href="https://hub.oomol.com/zh-CN/package/books-translator?open=true" target="_blank"><img src="https://static.oomol.com/assets/button.svg" alt="Open in OOMOL Studio" /></a></p>
   <p><a href="./README.md">English</a> | 中文</p>
 </div>
 
 
-使用大语言模型翻译 EPUB 电子书，同时保留原文。译文与原文并列显示，打造完美的双语阅读体验，特别适合语言学习和对照阅读。
+想读一本外文书,却担心失去原文的语境?EPUB Translator 可以将任何 EPUB 转换成双语版本,AI 翻译与原文并列展示。
 
-![翻译效果](./docs/images/translation.png)
+无论你是在学习新语言、进行学术研究,还是纯粹享受外国文学,你都能在一本书中同时获得两种版本——保留所有格式、图片和结构。
 
-## 特性
+![翻译效果](./docs/images/translation.png)
 
-- **双语对照**: 保留原文并与译文并列显示，方便对照阅读
-- **AI 驱动**: 利用大语言模型提供高质量、上下文感知的翻译
-- **格式保留**: 完整保持 EPUB 结构、样式、图片和格式
-- **全面翻译**: 翻译章节内容、目录和元数据
-- **进度追踪**: 内置回调函数监控翻译进度
-- **灵活的 LLM 支持**: 兼容任何 OpenAI 风格的 API 端点
-- **缓存机制**: 内置缓存功能用于翻译失败后恢复进度
+### 在线体验
 
-## 使用场景
+我们提供[在线演示平台](https://hub.oomol.com/zh-CN/package/books-translator),无需安装即可体验 EPUB Translator 的双语翻译功能。只需上传您的 EPUB 文件,即可获得翻译后的双语版本。
 
-- **语言学习**: 阅读原版书籍的同时参考译文
-- **学术研究**: 访问外文文献并获得双语参考
-- **内容本地化**: 为国际读者准备书籍
-- **跨文化阅读**: 在理解文化细微差别的同时欣赏文学作品
+[![EPUB Translator 在线演示](docs/images/online-cn.png)](https://hub.oomol.com/zh-CN/package/books-translator)
 
 ## 安装
 

docs/changelog/v0.1.9.md

@@ -0,0 +1,11 @@
+# Release v0.1.9
+
+This release fixes an issue with namespace handling in EPUB metadata files.
+
+## 🐛 Bug Fixes
+
+### Fixed Namespace Structure Preservation in TOC and OPF Files (#127)
+
+Fixed an issue where the XML namespace structure in Table of Contents (TOC) and OPF metadata files was not properly preserved during translation, which could cause compatibility issues with some e-readers.
+
+Related PR: https://github.com/oomol-lab/epub-translator/pull/127

docs/images/online-cn.png

@@ -1,6 +1,6 @@
 [project]
 name = "epub-translator"
-version = "0.1.8"
+version = "0.1.9"
 description = "Translate the epub book using LLM. The translated book will retain the original text and list the translated text side by side with the original text."
 keywords = ["epub", "llm", "translation", "translator"]
 authors = [