chore: minor refactor into some components and updated favicon

src/layouts/BaseLayout.astro

@@ -20,6 +20,8 @@ type Props = {
     pageTags?: string | string[]
 }
 
+import phcIcon from '../assets/icon.png'
+
 const { title, description, thumbnail, pageTags } = Astro.props
 ---
 
@@ -36,7 +38,7 @@ const { title, description, thumbnail, pageTags } = Astro.props
         <meta property="og:url" content="https://phc.dm.unipi.it/" />
         {thumbnail && <meta property="og:image" content={thumbnail} />}
 
-        <link rel="icon" type="image/png" sizes="512x512" href="/favicon.svg" />
+        <link rel="icon" type="image/png" sizes="512x512" href={phcIcon.src} />
 
         <script>
             import renderMathInElement from 'katex/contrib/auto-render'