add lightbox for post image previews 2

app/templates/threads/thread.html

@@ -5,6 +5,7 @@
 {%- block title -%}{{thread.title}}{%- endblock -%}
 {%- block content -%}
 <bitty-8 data-connect="/static/js/bits/bookmark-menu.js"></bitty-8>
+<bitty-8 data-connect="/static/js/bits/thread.js"></bitty-8>
 {%- set td -%}
 <ul class="horizontal">
 <li>Started by <a href="{{url_for('users.user_page', username=started_by.username)}}">{{started_by.get_readable_name()}}</a> in topic <a href="{{url_for('topics.topic_by_id', topic_id=topic.id)}}">{{topic.name}}</a></li>
@@ -84,6 +85,18 @@
   </span>
 </div>
 {{ bookmark_menu() }}
+<dialog closedby="any" class="plank thread-lighbox" data-r="showLightbox closeLightbox">
+  <div class="menu">
+    <button data-s="closeLightbox">Close</button>
+    <a href="" target="_blank" rel="noreferrer noopener" class="linkbutton alt">Open original</a>
+  </div>
+  <img class="lightbox-image" src="https://placehold.co/900x710">
+  <div class="menu">
+    <button data-s="lightboxPrevious">Previous</button>
+    <span data-r="lightboxSetCounter">0/0</span>
+    <button data-s="lightboxNext">Next</button>
+  </div>
+</dialog>
 {%- if is_logged_in() and get_active_user().can_post_to_thread_or_topic(thread) -%}
 <form action="{{url_for('threads.reply', thread_id=thread.id)}}" method="POST" class="plank post-edit-form" data-listen="submit" data-r="clearThreadDraft" data-s="clearThreadDraft">
   <h2 class="info">Reply to "{{thread.title}}"</h2>