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/Policies/QrCodePolicy.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace App\Policies;
+
+use App\Models\QrCode;
+use App\Models\User;
+
+class QrCodePolicy
+{
+    public function view(User $user, QrCode $qrCode): bool
+    {
+        return $user->id === $qrCode->user_id;
+    }
+
+    public function update(User $user, QrCode $qrCode): bool
+    {
+        return $user->id === $qrCode->user_id;
+    }
+
+    public function delete(User $user, QrCode $qrCode): bool
+    {
+        return $user->id === $qrCode->user_id;
+    }
+}