Extract Ladill QR Plus as standalone app at qr.ladill.com.

Utility QR types only (URL, WiFi, link list, business, app download) with
SSO, Billing API integration, public /q resolver, and qr-plus:import for
platform migration. vCard and commerce types stay on the platform.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Notifications/DomainVerifiedNotification.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Notifications;
+
+use App\Models\Domain;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Notifications\Notification;
+use Illuminate\Notifications\Messages\MailMessage;
+
+class DomainVerifiedNotification extends Notification implements ShouldQueue
+{
+    use Queueable;
+
+    public function __construct(
+        private readonly Domain $domain
+    ) {
+    }
+
+    public function via($notifiable): array
+    {
+        return ['mail', 'database'];
+    }
+
+    public function toMail($notifiable): MailMessage
+    {
+        return (new MailMessage())
+            ->subject("Domain Verified: {$this->domain->host} is now active!")
+            ->view('mail.notifications.domain-verified', [
+                'domain' => $this->domain,
+                'manageUrl' => route('user.domains.show', $this->domain),
+                'emailUrl' => route('user.mailboxes.index'),
+            ]);
+    }
+
+    public function toArray($notifiable): array
+    {
+        return [
+            'title' => 'Domain Verified',
+            'message' => "Your domain {$this->domain->host} has been verified and is now active.",
+            'icon' => 'success',
+            'url' => route('user.domains.show', $this->domain),
+        ];
+    }
+}