fix: remove stray </div> that closed scroll container before Scheduled/Settings tabs

A spurious 4-space </div> after tab-groups was closing #content-scroll
prematurely, placing tab-scheduled and tab-settings outside the scroll
container. This caused the large blank space at the top of those tabs.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Eran

index.html

@@ -938,9 +938,6 @@ <h3 class="text-sm font-semibold text-red-600">Leave Group</h3>
         </div>
       </div>
 
-    </div>
-
-      <!-- SETTINGS -->
       <!-- SCHEDULED JOBS -->
       <div id="tab-scheduled" class="tab-panel max-w-3xl">
         <div class="flex items-center justify-between mb-1">