Fix Slack/Email/CSV buttons not showing due to scope issue

- Fixed isShowingArchived variable scope issue in template literals
- Created isArchivedView variable in correct scope for button rendering
- Buttons now properly show for active sessions and hide for archived sessions

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: Archith

scripts/app.js

@@ -671,6 +671,9 @@
         // Get the full session data to access notes
         const fullSession = sessions[session.code];
 
+        // Make isShowingArchived available in this scope
+        const isArchivedView = isShowingArchived;
+        
         // Separate candidates and interviewers
         const users = Object.values(session.users);
         const candidates = users.filter(user => {
@@ -782,7 +785,7 @@
                 <span>View</span>
               </button>
               
-              ${!isShowingArchived ? `
+              ${!isArchivedView ? `
                 <button class="action-btn slack-btn" data-code="${session.code}" title="Export to Slack">
                   <svg width="16" height="16" viewBox="0 0 24 24" fill="currentColor">
                     <path d="M5.042 15.165a2.528 2.528 0 0 1-2.52 2.523A2.528 2.528 0 0 1 0 15.165a2.527 2.527 0 0 1 2.522-2.52h2.52v2.52zM6.313 15.165a2.527 2.527 0 0 1 2.521-2.52 2.527 2.527 0 0 1 2.521 2.52v6.313A2.528 2.528 0 0 1 8.834 24a2.528 2.528 0 0 1-2.521-2.522v-6.313zM8.834 5.042a2.528 2.528 0 0 1-2.521-2.52A2.528 2.528 0 0 1 8.834 0a2.528 2.528 0 0 1 2.521 2.522v2.52H8.834zM8.834 6.313a2.528 2.528 0 0 1 2.521 2.521 2.528 2.528 0 0 1-2.521 2.521H2.522A2.528 2.528 0 0 1 0 8.834a2.528 2.528 0 0 1 2.522-2.521h6.312zM18.956 8.834a2.528 2.528 0 0 1 2.522-2.521A2.528 2.528 0 0 1 24 8.834a2.528 2.528 0 0 1-2.522 2.521h-2.522V8.834zM17.688 8.834a2.528 2.528 0 0 1-2.523 2.521 2.527 2.527 0 0 1-2.52-2.521V2.522A2.527 2.527 0 0 1 15.165 0a2.528 2.528 0 0 1 2.523 2.522v6.312zM15.165 18.956a2.528 2.528 0 0 1 2.523 2.522A2.528 2.528 0 0 1 15.165 24a2.527 2.527 0 0 1-2.52-2.522v-2.522h2.52zM15.165 17.688a2.527 2.527 0 0 1-2.52-2.523 2.526 2.526 0 0 1 2.52-2.52h6.313A2.527 2.527 0 0 1 24 15.165a2.528 2.528 0 0 1-2.522 2.523h-6.313z"/>
@@ -812,7 +815,7 @@
                 </button>
               ` : ''}
               
-              ${isShowingArchived ? 
+              ${isArchivedView ? 
                 `<button class="action-btn delete-forever-btn" data-code="${session.code}" title="Permanently Delete">
                   <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
                     <polyline points="3 6 5 6 21 6"></polyline>