feat: Implement client status validation on login, refine password rules, and simplify customer resource status.

app/Mail/InvoiceNotificationMail.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace App\Mail;
+
+use App\Models\Invoice;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+use Illuminate\Queue\SerializesModels;
+
+class InvoiceNotificationMail extends Mailable implements ShouldQueue
+{
+    use Queueable, SerializesModels;
+
+    public function __construct(
+        public readonly Invoice $invoice,
+        public readonly Collection $attachments,
+        public readonly string $customerName,
+        public readonly string $message,
+        public readonly string $companyName,
+    ) {}
+
+    public function envelope(): Envelope
+    {
+        return new Envelope(
+            subject: "Thông báo hóa đơn #{$this->invoice->order_num} - {$this->companyName}",
+        );
+    }
+
+    public function content(): Content
+    {
+        return new Content(
+            view: 'emails.invoice-notification',
+            with: [
+                'invoice'      => $this->invoice,
+                'attachments'  => $this->attachments,
+                'customerName' => $this->customerName,
+                'message'      => $this->message,
+                'companyName'  => $this->companyName,
+            ]
+        );
+    }
+
+    public function attachments(): array
+    {
+        return [];
+    }
+}