perf: 使用 font-display: optional 減少 LCP

Author: Dr. Awesome Doge

_includes/head.html

@@ -17,9 +17,9 @@
   <!-- Critical CSS -->
   <link rel="stylesheet" href="{{ '/assets/css/app.css' | relative_url }}">
 
-  <!-- Fonts - Minimal (single weight, deferred) -->
-  <link rel="preload" href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400&family=Noto+Sans+TC:wght@400&display=swap" as="style" onload="this.onload=null;this.rel='stylesheet'">
-  <noscript><link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400&family=Noto+Sans+TC:wght@400&display=swap"></noscript>
+  <!-- Fonts - Minimal (single weight, optional display) -->
+  <link rel="preload" href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400&family=Noto+Sans+TC:wght@400&display=optional" as="style" onload="this.onload=null;this.rel='stylesheet'">
+  <noscript><link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400&family=Noto+Sans+TC:wght@400&display=optional"></noscript>
 
   <!-- Favicon -->
   <link rel="shortcut icon" type="image/png" href="{{ '/favicon.png' | relative_url }}">