feat: lazy-load security center (Closes #605)

frontend/index.html

@@ -831,6 +831,7 @@
 
 <script src="static/session.js"></script>
 <script src="static/feature-loader.js"></script>
+<script src="static/security-center.js"></script>
 <script src="static/markdown.js"></script>
 <script src="static/commands.js"></script>
 <script src="static/search-preview.js"></script>