feat: implement infinite scroll on the author page

author.hbs

@@ -65,7 +65,22 @@
         {{#foreach posts}}
             {{> "post-card"}}
         {{/foreach}}
+
+        {{#if pagination.next}}
+            <div id="pagination-trigger" 
+                 hx-get="{{page_url pagination.next}}" 
+                 hx-trigger="revealed" 
+                 hx-select="#posts-container > *" 
+                 hx-target="this" 
+                 hx-swap="outerHTML"
+                 hx-indicator="#loading-spinner"
+                 class="col-span-full h-1">
+            </div>
+        {{/if}}
     </div>
 
-    {{pagination}}
+    <div id="loading-spinner" class="htmx-indicator text-center py-12">
+        <div class="inline-block animate-spin rounded-full h-10 w-10 border-4 border-[var(--brand-primary)] border-t-transparent"></div>
+        <p class="text-[var(--text-secondary)] mt-4 font-medium tracking-wide">Loading more posts...</p>
+    </div>
 </div>