2.5.1

1. 美化菜单栏，增加高斯模糊效果
2. 不阻塞加载 JS 脚本
3. 图片懒加载
4. 优化头像来源方式
5. 增加 404 模板

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1. Beautified the menu bar by adding a Gaussian blur effect
2. Implemented non-blocking loading of JS scripts
3. Added lazy loading of images
4. Optimized the way avatar sources are handled
5. Added a 404 template for better error handling