Add sign-out button to results page

- Add logout button to results section for easy sign-out
- Position button next to retake assessment button
- Use door emoji for clear visual indication
- Improve user experience with easy logout option

templates/index.html

@@ -136,6 +136,7 @@
                 
                 <div class="buttons-row">
                     <button class="btn reset-btn" onclick="resetAssessment()">🔄 Retake Assessment</button>
+                    <a href="/logout" class="btn logout-btn">🚪 Sign Out</a>
                 </div>
             {% endif %}
         {% endif %}