refactor: extract post feed logic into reusable partial

tag.hbs

@@ -18,29 +18,7 @@
 
 <div class="container mx-auto px-4 pb-20">
     {{#if posts}}
-        <div id="posts-container" class="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-10">
-            {{#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>
-
-        <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>
-
+        {{> "post-feed"}}
     {{else}}
         <p class="text-center text-[var(--text-secondary)] text-2xl py-20">No posts found.</p>
     {{/if}}