Settings: General, Connections, Security and Admin tabs (last one remembered); Reminders no longer hangs when the service worker does not start

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

public/style.css

@@ -734,3 +734,8 @@ body.nav-mini .ngrp span { display: none; }
   .homeapps { order: 4; }
   .homeapps h2:first-child { margin-top: 18px; }
 }
+
+#settabs { margin: 12px 0 0; }
+.sgroup[hidden] { display: none; }
+.sgroup > h2:first-child, .sgroup > div:first-child > h2:first-child { margin-top: 20px; }
+@media (max-width: 560px) { #settabs { display: flex; } #settabs a { flex: 1; justify-content: center; padding: 6px 8px; } }