Add next/prev links to bottom of blog posts

src/frontend/styles.css

@@ -914,6 +914,64 @@ h1 {
     margin: 0;
 }
 
+.post-navigation {
+    margin-top: 48px;
+    padding-top: 24px;
+    border-top: 1px solid var(--border-color);
+}
+
+.post-nav-links {
+    display: flex;
+    justify-content: space-between;
+    gap: 16px;
+}
+
+.post-nav-link {
+    display: flex;
+    flex-direction: column;
+    padding: 12px 16px;
+    border-radius: 6px;
+    background-color: var(--sheet-background);
+    border: 1px solid var(--border-color);
+    text-decoration: none;
+    color: var(--text-primary);
+    transition: all 0.2s ease;
+    flex: 1;
+    max-width: 48%;
+}
+
+.post-nav-link:hover {
+    background-color: var(--accent-color);
+    color: var(--accent-text-color);
+    transform: translateY(-2px);
+}
+
+.prev-nav {
+    align-items: flex-start;
+}
+
+.next-nav {
+    align-items: flex-end;
+    text-align: right;
+}
+
+.nav-direction {
+    font-size: 0.875rem;
+    font-weight: 600;
+    margin-bottom: 4px;
+    color: var(--accent-color);
+}
+
+.post-nav-link:hover .nav-direction {
+    color: var(--accent-text-color);
+}
+
+.nav-title {
+    font-size: 1rem;
+    font-weight: 500;
+    line-height: 1.4;
+}
+
 /* Responsive adjustments */
 @media (max-width: 1200px) {
     aside {
@@ -1025,16 +1083,24 @@ h1 {
     }
 
     .post-content h3 {
-        font-size: 20px;
+        font-size: 22px;
+    }
+
+    .post-nav-link {
+        padding: 10px 12px;
+        font-size: 0.9rem;
+    }
+
+    .nav-title {
+        font-size: 0.9rem;
     }
 
     .tag-pills {
-        gap: 6px;
+        display: flex;
     }
 
     .tag-pill {
-        font-size: 12px;
-        padding: 4px 10px;
+        padding: 6px 12px;
     }
 }