Copilot suggestions

Author: Grufoony

_includes/pdf-preview.html

@@ -4,11 +4,13 @@
     type="application/pdf"
     aria-label="{{ include.title | default: 'PDF preview' | regex_strip }}"
   >
-    <img
-      src="{{ include.image | relative_url | uri_escape }}"
-      alt="{{ include.title | default: 'preview image' | regex_strip }}"
-      loading="lazy"
-      {% include fallback.html %}
-    >
+    {% if include.image %}
+      <img
+        src="{{ include.image | relative_url | uri_escape }}"
+        alt="{{ include.title | default: 'preview image' | regex_strip }}"
+        loading="lazy"
+        {% include fallback.html %}
+      >
+    {% endif %}
   </object>
 {% endif %}

_includes/poster-list.html

@@ -3,7 +3,8 @@
 <div class="citation-container">
   <div class="citation">
     <a href="{{ poster.pdf | relative_url }}" target="_blank" class="citation-image" aria-label="{{ poster.title | default: 'poster link' | regex_strip }}">
-      {% include pdf-preview.html pdf=poster.pdf image=poster.image title=poster.title %}
+      {% assign poster_image = poster.image | default: '/assets/img/poster-placeholder.png' %}
+      {% include pdf-preview.html pdf=poster.pdf image=poster_image title=poster.title %}
     </a>
     <div class="citation-text">
       {% include icon.html icon="fa-solid fa-chalkboard" %}