doc: update README.md

Author: jaywcjlove

README.md

@@ -38,6 +38,7 @@ Quickly move, click, and drag the mouse cursor using just your keyboard. Boost y
 - **Grid navigation mode**: Navigate precisely using a resizable on-screen grid  
 - **Multi-display support**: Seamlessly move the cursor across multiple monitors  
 - **Custom Dock-style launcher**: Create a customizable Dock-style panel for quick app or action access  
+- **Focus Screen**: Highlight the screen under the mouse cursor to focus on the active area.  
 
 ### Shortcuts
 

README.zh.md

@@ -37,6 +37,7 @@
 - **网格导航模式**：通过可调整大小的屏幕网格实现精准导航  
 - **多显示器支持**：无缝在多个显示器之间移动光标  
 - **自定义 Dock 样式启动器**：创建可自定义的 Dock 样式面板，快速访问应用或操作  
+- **焦点屏幕**：高亮鼠标光标所在屏幕，聚焦当前操作区域
 
 ### 快捷键