docs: add WeChat/QQ version update guide and file manager feature docs (#100)

README.md

@@ -35,6 +35,7 @@
 - 🪟 **窗口切换器**：左上角增加切换悬浮窗，方便切换到后台窗口，为后续添加其它功能做基础
 - 🤖 **自动启动**：可配置自动启动微信和QQ客户端（可选）
 - 📋 **桌面快捷方式集成**：自动扫描 `~/Desktop/` 下的 `.desktop` 文件并添加到右键菜单，方便启动第三方应用（如通过 proot-apps 安装的应用）
+- 📂 **文件管理器**：内置 PCManFM 轻量文件管理器，右键菜单即可启动，方便管理容器内文件
 
 ## 截图展示
 ![微信截图](./docs/images/wechat-selkies-1.jpg)
@@ -201,6 +202,20 @@ wechat-selkies/
 
 ## 故障排除
 
+### 更新微信/QQ版本
+
+当微信或QQ提示"版本过期"时，只需重新拉取最新镜像并重建容器即可，聊天记录和配置不受影响：
+
+```bash
+# 使用预构建镜像
+docker-compose pull && docker-compose up -d
+
+# 使用源码构建
+git pull && docker-compose up -d --build
+```
+
+> **注意：** 微信和QQ的安装包 URL 指向官方最新版本，重新构建镜像时会自动下载最新版。
+
 ### 常见问题
 
 1. **无法访问 Web UI**

README_en.md

@@ -35,6 +35,7 @@ This project packages the official WeChat/QQ Linux client in a Docker container,
 - 🪟 **Window Switcher**: Added a floating window switcher in the top left corner for easy switching to background windows, laying the foundation for adding other features in the future
 - 🤖 **Auto Start**: Configurable auto-start for WeChat and QQ clients (optional)
 - 📋 **Desktop Shortcut Integration**: Automatically scans `.desktop` files in `~/Desktop/` and adds them to the right-click menu, making it easy to launch third-party applications (e.g., apps installed via proot-apps)
+- 📂 **File Manager**: Built-in PCManFM lightweight file manager, accessible from the right-click menu for easy file management inside the container
 
 ## Screenshots
 ![WeChat Screenshot](./docs/images/wechat-selkies-1.jpg)
@@ -200,6 +201,20 @@ wechat-selkies/
 
 ## Troubleshooting
 
+### Updating WeChat/QQ Version
+
+When WeChat or QQ displays a "version outdated" message, simply pull the latest image and recreate the container. Your chat history and configurations will be preserved:
+
+```bash
+# Using pre-built images
+docker-compose pull && docker-compose up -d
+
+# Using source code build
+git pull && docker-compose up -d --build
+```
+
+> **Note:** The WeChat and QQ download URLs point to the latest official versions. Rebuilding the image will automatically download the newest version.
+
 ### Common Issues
 
 1. **Unable to access Web UI**