chore: Temporarily simplify image rendering in [tag].astro for debugging

src/pages/tag/[tag].astro

@@ -44,23 +44,14 @@ const sortedPosts = posts.sort((a, b) => {
     <div class="blog-grid">
       {sortedPosts.map((post) => (
         <article class="post-card">
-          {post.data.heroImage ? (
-            <img
-              width={720}
-              height={360}
-              src={post.data.heroImage}
-              alt=""
-              class="post-image"
-            />
-          ) : (
-            <img
-              width={720}
-              height={360}
-              src="/images/placeholders/default.jpg"
-              alt=""
-              class="post-image"
-            />
-          )}
+          {/* Temporarily removed conditional image rendering for debugging */}
+          <img
+            width={720}
+            height={360}
+            src="/images/placeholders/default.jpg"
+            alt=""
+            class="post-image"
+          />
           <div class="post-content">
             <div class="post-meta">
               <time datetime={post.data.pubDate ? new Date(post.data.pubDate).toISOString() : ''}>