Sprint view: 100px bottom spacer below the task list

Pure layout breathing room — keeps the last row from sitting flush
against the viewport bottom and gives the cell popover anchored on
the last row somewhere to render without scrolling.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

views/sprints/show.twig

@@ -200,6 +200,10 @@
 
         {% include "sprints/_task_list.twig" %}
 
+        {# Spacer so the task list never sits flush against the viewport
+           bottom — gives room for popovers anchored on the last row. #}
+        <div aria-hidden="true" class="min-h-[100px]"></div>
+
     {% endif %}
 </section>