feat: AfterSales CRM - SOP compliant real-estate customer care system

- Departments + cross-department transfer workflow
- Role-based closing (staff→resolved, manager→closed) with proof_of_resolution
- Private file storage with collection system + temporary signed URLs
- Dashboard: resolved tickets table, stats, handler performance bar chart
- Spatie RBAC (admin/manager/staff)
- Notifications: TicketTransferred, TicketClosed (database + mail)
- Pest tests: 8 tests, 21 assertions
- Docker production-ready (Dockerfile + compose + entrypoint)

app/Notifications/TicketClosed.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Notifications;
+
+use App\Models\Feedback;
+use App\Models\User;
+use Illuminate\Bus\Queueable;
+use Illuminate\Notifications\Messages\MailMessage;
+use Illuminate\Notifications\Notification;
+
+class TicketClosed extends Notification
+{
+    use Queueable;
+
+    public function __construct(
+        public Feedback $feedback,
+        public User $actor,
+    ) {}
+
+    public function via(object $notifiable): array
+    {
+        return ['database', 'mail'];
+    }
+
+    public function toMail(object $notifiable): MailMessage
+    {
+        return (new MailMessage)
+            ->subject(__('Ticket #{id} đã được đóng', ['id' => $this->feedback->id]))
+            ->line(__('Ticket: :title', ['title' => $this->feedback->title]))
+            ->line(__('Đóng bởi: :name', ['name' => $this->actor->name]))
+            ->action(__('Xem Ticket'), url('/admin/feedbacks/' . $this->feedback->id . '/edit'));
+    }
+
+    public function toDatabase(object $notifiable): array
+    {
+        return [
+            'message' => __('Ticket #{id} ":title" đã được đóng bởi :actor.', [
+                'id' => $this->feedback->id,
+                'title' => $this->feedback->title,
+                'actor' => $this->actor->name,
+            ]),
+            'feedback_id' => $this->feedback->id,
+            'actor_name' => $this->actor->name,
+        ];
+    }
+}