fix prettier formatting

Author: Keyu-He

_layouts/about.liquid

@@ -72,8 +72,21 @@ layout: default
         <div class="contact-note">{{ site.contact_note }}</div>
       </div>
     {% endif %}
-
-
+    <!-- Visitor Analytics (local only) -->
+    {% if site.visitor_map.enabled and jekyll.environment == 'development' %}
+      <div class="visitor-analytics" style="margin-top: 1.5rem; text-align: center;">
+        <details style="margin-top: 1rem;">
+          <summary style="cursor: pointer; font-size: 1.0rem; color: #999; font-style: italic;">Visitor Map</summary>
+          <div id="admin-analytics" style="margin-top: 1rem; opacity: 0.8;">
+            <script
+              type="text/javascript"
+              id="mapmyvisitors"
+              src="//mapmyvisitors.com/map.js?d=VGq-6ngx9SQOzI4uqqrGzo8741s606-66KR_dTZ9b00&cl=ffffff&w=a"
+            ></script>
+          </div>
+        </details>
+      </div>
+    {% endif %}
 
     {% if site.newsletter.enabled and site.footer_fixed %}
       {% include scripts/newsletter.liquid center=true %}