feat: harden auth flows and server mobile navigation

Add normalized email identity rate limiting for registration and forgot-password requests, and refresh Sentinel status from restart broadcasts.

Rework server sidebars and navbar for mobile menus and active status visibility.

app/Livewire/Server/Navbar.php

@@ -39,6 +39,7 @@ class Navbar extends Component
         return [
             'refreshServerShow' => 'refreshServer',
             "echo-private:team.{$teamId},ProxyStatusChangedUI" => 'showNotification',
+            "echo-private:team.{$teamId},SentinelRestarted" => 'refreshSentinelStatus',
         ];
     }
 
@@ -203,6 +204,15 @@ class Navbar extends Component
         $this->server->load('settings');
     }
 
+    public function refreshSentinelStatus($event = null): void
+    {
+        if (isset($event['serverUuid']) && $event['serverUuid'] !== $this->server->uuid) {
+            return;
+        }
+
+        $this->refreshServer();
+    }
+
     /**
      * Check if Traefik has any outdated version info (patch or minor upgrade).
      * This shows a warning indicator in the navbar.