docs: make English the default docs language and fix link paths

docs/releases/v2.0.4.mdx

@@ -1,51 +1,55 @@
 ---
 title: v2.0.4
-description: CowAgent 2.0.4 - 新增个人微信通道、新模型支持、日文文档、脚本重构及多项修复
+description: CowAgent 2.0.4 - Personal WeChat channel, new model support, Japanese docs, script refactoring and bug fixes
 ---
 
-## 🔌 新增个人微信通道
+## 🔌 Personal WeChat Channel
 
-新增个人微信（`weixin`）通道，微信扫描二维码即可将 CowAgent 接入个人微信，支持以下功能：
+Added personal WeChat (`weixin`) channel — the most important update in this release. Simply scan a QR code to connect CowAgent to your personal WeChat account, with support for:
 
-- **消息收发**：支持文本、图片、文件、视频消息的接收与回复，支持语音消息接收和识别
-- **扫码登录**：终端显示二维码，微信扫码确认即可登录，二维码过期自动刷新
-- **凭证持久化**：登录凭证自动保存至 `~/.weixin_cow_credentials.json`，重启无需重新扫码
-- **Session 自动重连**：Session 过期后自动清除旧凭证并重新发起扫码登录
-- **Web 控制台接入**：支持在 Web 控制台中添加微信通道，扫码登录流程同步展示
-- **Docker 和脚本支持**：`run.sh` 和 `docker-compose.yml` 均已适配微信通道
+- **Messaging**: Send and receive text, image, file, and video messages; receive voice messages
+- **QR Code Login**: QR code displayed in terminal, scan with WeChat to log in; auto-refresh on expiry
+- **Credential Persistence**: Login credentials saved to `~/.weixin_cow_credentials.json` automatically, no re-scan needed on restart
+- **Session Auto-Reconnect**: Automatically clears expired credentials and re-initiates QR code login
+- **Web Console Integration**: Add WeChat channel from the Web Console with synchronized QR code login flow
+- **Docker & Script Support**: Both `run.sh` and `docker-compose.yml` now support the WeChat channel
 
-接入文档：[微信接入](https://docs.cowagent.ai/channels/weixin)。
+Documentation: [WeChat Channel](https://docs.cowagent.ai/channels/weixin).
 
-相关提交：[ce89869](https://github.com/zhayujie/CowAgent/commit/ce89869)
+Related commits: [ce89869](https://github.com/zhayujie/CowAgent/commit/ce89869), [a483ec0](https://github.com/zhayujie/CowAgent/commit/a483ec0), [c1421e0](https://github.com/zhayujie/CowAgent/commit/c1421e0)
 
-## 🤖 新增模型
+## 🤖 New Models
 
-- **MiniMax-M2.7**：新增 MiniMax-M2.7 模型支持
-- **GLM-5-Turbo**：新增智谱 glm-5-turbo 模型支持
+- **MiniMax-M2.7**: Added MiniMax-M2.7 model support
+- **GLM-5-Turbo**: Added Zhipu glm-5-turbo model support
 
-相关提交：[9192f6f](https://github.com/zhayujie/CowAgent/commit/9192f6f)
+Related commits: [9192f6f](https://github.com/zhayujie/CowAgent/commit/9192f6f)
 
-## 🔧 脚本重构
+## 🔧 Script Refactoring
 
-- **run.sh 重构**：提取公共逻辑，精简脚本代码([49d8707](https://github.com/zhayujie/CowAgent/commit/49d8707))
-- **可执行权限**：修复 `run.sh` 文件权限问题 ([652156e](https://github.com/zhayujie/CowAgent/commit/652156e))
-- **PID 获取**：修复 `run.sh` 中进程 PID 获取错误的问题 ([9febb07](https://github.com/zhayujie/CowAgent/commit/9febb07))
+- **run.sh Refactoring**: Extracted shared logic and eliminated duplication, reducing from 600+ lines to 177 lines ([49d8707](https://github.com/zhayujie/CowAgent/commit/49d8707))
+- **Executable Permission**: Fixed `run.sh` file permission issue ([652156e](https://github.com/zhayujie/CowAgent/commit/652156e))
 
-## 🌍 文档更新
+## ⚡ Improvements
 
-新增完整的日文文档，覆盖入门指南、通道接入、模型配置等主要章节。Thanks [@Ikko Ashimine](https://github.com/ikoamu)
+- **Unified Request Headers**: Added identification headers to external requests across Agent services (Chat, Embedding, Vision, WebSearch, etc.) ([b4e711f](https://github.com/zhayujie/CowAgent/commit/b4e711f))
+- **Auto-Repair Messages**: Enhanced message protocol fault tolerance with automatic repair of malformed message sequences ([b8b57e3](https://github.com/zhayujie/CowAgent/commit/b8b57e3))
 
-相关提交：[5487c0b](https://github.com/zhayujie/CowAgent/commit/5487c0b)
+## 🌍 Japanese Documentation
 
-## 🐛 问题修复
+Added complete Japanese documentation covering getting started guide, channel integration, model configuration and other major sections. Thanks [@Ikko Ashimine](https://github.com/ikoamu)
 
-- **企微机器人兼容**：修复旧版 `websocket-client` 的兼容性问题，新增统一的 WebSocket 兼容层 ([bc7f627](https://github.com/zhayujie/CowAgent/commit/bc7f627))
-- **消息自动修复**：增强消息协议的容错能力，自动修复格式异常的消息序列 ([b8b57e3](https://github.com/zhayujie/CowAgent/commit/b8b57e3))
-- **飞书编码**：修复飞书通道消息和日志的编码问题 ([7d0e156](https://github.com/zhayujie/CowAgent/commit/7d0e156))
-- **飞书配置**：移除 `run.sh` 中对 `feishu_bot_name` 的冗余依赖 ([1b5be1b](https://github.com/zhayujie/CowAgent/commit/1b5be1b))
+Related commits: [5487c0b](https://github.com/zhayujie/CowAgent/commit/5487c0b)
 
-## 📦 升级方式
+## 🐛 Bug Fixes
 
-源码部署可执行 `./run.sh update` 一键升级，或手动拉取代码后重启。详见 [更新升级文档](https://docs.cowagent.ai/guide/upgrade)。
+- **WeCom Bot Compatibility**: Fixed compatibility with older `websocket-client` versions, added unified WebSocket compatibility layer ([bc7f627](https://github.com/zhayujie/CowAgent/commit/bc7f627))
+- **run.sh PID**: Fixed process PID retrieval error in `run.sh` ([9febb07](https://github.com/zhayujie/CowAgent/commit/9febb07))
+- **Feishu Encoding**: Fixed message and log encoding issue in Feishu channel ([7d0e156](https://github.com/zhayujie/CowAgent/commit/7d0e156))
+- **Feishu Config**: Removed redundant `feishu_bot_name` dependency in `run.sh` ([1b5be1b](https://github.com/zhayujie/CowAgent/commit/1b5be1b))
 
-**发布日期**：2026.03.22 | [Full Changelog](https://github.com/zhayujie/CowAgent/compare/2.0.3...master)
+## 📦 Upgrade
+
+Run `./run.sh update` for a one-click upgrade, or manually pull the latest code and restart. See [Upgrade Guide](https://docs.cowagent.ai/guide/upgrade) for details.
+
+**Release Date**: 2026.03.22 | [Full Changelog](https://github.com/zhayujie/CowAgent/compare/2.0.3...master)