feat: show conversations in mobile search preview (Closes #803)

frontend/index.html

@@ -465,6 +465,13 @@
     <div id="search-preview-status" class="small" aria-live="polite">Choose a search result.</div>
     <div id="search-preview-meta" class="row"></div>
     <div id="search-preview-body" class="search-preview-body markdown-content"></div>
+    <section id="search-preview-conversation" class="search-preview-conversation" aria-labelledby="search-preview-conversation-title">
+      <h2 id="search-preview-conversation-title">Current conversation</h2>
+      <div id="search-preview-comments"></div>
+      <div id="search-preview-conversation-status" class="small" aria-live="polite"></div>
+      <button id="retry-search-preview-conversation" type="button" hidden>Retry conversation</button>
+      <button id="load-older-search-preview-comments" type="button" hidden>Load older messages</button>
+    </section>
     <div class="search-preview-actions">
       <nav class="search-preview-navigation" aria-label="Search result navigation" hidden>
         <button id="previous-search-result" type="button">Previous</button>