fix: 切换暗色主题时 meta theme-color不会被修改的问题

src/components/ThemeIcon.astro

@@ -54,12 +54,12 @@
 
   if (theme === 'light') {
     document.documentElement.classList.remove('dark');
+    meta.setAttribute('content', '#ffffff');
   } else {
     document.documentElement.classList.add('dark');
+    meta.setAttribute('content', '#0a0a0a');
   }
 
-  meta.setAttribute('content', theme === 'dark' ? '#0a0a0a' : '#ffffff');
-
   window.localStorage.setItem('theme', theme);
 
   const handleToggleClick = () => {
@@ -67,6 +67,7 @@
     element.classList.toggle("dark");
 
     const isDark = element.classList.contains("dark");
+    meta.setAttribute('content', isDark ? '#0a0a0a' : '#ffffff');
     localStorage.setItem("theme", isDark ? "dark" : "light");
   }