complete story 8.2 with qa tests

app/Mail/WelcomeEmail.php

@@ -0,0 +1,67 @@
+<?php
+
+namespace App\Mail;
+
+use App\Models\User;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+use Illuminate\Queue\SerializesModels;
+
+class WelcomeEmail extends Mailable implements ShouldQueue
+{
+    use Queueable, SerializesModels;
+
+    /**
+     * Create a new message instance.
+     */
+    public function __construct(
+        public User $user,
+        public string $password
+    ) {
+        $this->locale = $user->preferred_language ?? 'ar';
+    }
+
+    /**
+     * Get the message envelope.
+     */
+    public function envelope(): Envelope
+    {
+        $locale = $this->user->preferred_language ?? 'ar';
+
+        return new Envelope(
+            subject: $locale === 'en'
+                ? 'Welcome to Libra Law Firm'
+                : 'مرحباً بك في مكتب ليبرا للمحاماة',
+        );
+    }
+
+    /**
+     * Get the message content definition.
+     */
+    public function content(): Content
+    {
+        $locale = $this->user->preferred_language ?? 'ar';
+
+        return new Content(
+            markdown: 'emails.welcome.'.$locale,
+            with: [
+                'user' => $this->user,
+                'password' => $this->password,
+                'loginUrl' => route('login'),
+            ],
+        );
+    }
+
+    /**
+     * Get the attachments for the message.
+     *
+     * @return array<int, \Illuminate\Mail\Mailables\Attachment>
+     */
+    public function attachments(): array
+    {
+        return [];
+    }
+}