Add 'back to home' link on blog posts

src/frontend/pages/post.tsx

@@ -24,6 +24,11 @@ export function Post({ children, meta }: PostProps) {
         <main>
           <article className="blog-post">
             <header className="post-header">
+              <div className="back-button">
+                <a href="/" className="back-link">
+                  <span className="back-arrow">←</span> Back to Home
+                </a>
+              </div>
               <h1>{meta.title}</h1>
               <div className="post-meta">
                 {meta.date && meta.date instanceof Date &&