feat: add underline animation

- Implement underline-animation UnoCSS shortcut for navbar links
- Add dynamic hover and page transition effects for navigation
- Update Navbar component to use new underline-animation class
- Remove CDN configuration from preload settings
- Modify font class for date display in index page
- Add inline script to handle link animations during page transitions

src/styles/global.css

@@ -47,6 +47,7 @@ h6 {
 
 article img {
   --at-apply: 'cursor-zoom-in';
+  /* Optimize animation performance of Scrollbar */
   transform: translateZ(0);
   -webkit-transform: translateZ(0);
 }