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

src/frontend_bundle.py

@@ -26,6 +26,7 @@ FEATURE_SOURCES = {
     "pull-workflow": ("static/pull-sheet.js", "static/review-sheet.js"),
     "push-notifications": ("static/push-notifications.js",),
     "device-setup": ("static/install-app.js", "static/mobile-device-setup.js"),
+    "security-center": ("static/security-center.js",),
     "today-timer": (
         "static/mobile-task-dock.js", "static/today-timer.js", "static/today-recap.js",
         "static/today-rollover.js",