update

app/Notifications/UserFollowedNotification.php

@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Notifications;
+
+use App\Models\User;
+use Illuminate\Bus\Queueable;
+use Illuminate\Notifications\Notification;
+
+class UserFollowedNotification extends Notification
+{
+    use Queueable;
+
+    public function __construct(private readonly User $actor) {}
+
+    public function via(object $notifiable): array
+    {
+        return ['database'];
+    }
+
+    public function databaseType(object $notifiable): string
+    {
+        return 'user_followed';
+    }
+
+    public function toDatabase(object $notifiable): array
+    {
+        $label = $this->actor->name ?: $this->actor->username ?: 'Someone';
+
+        return [
+            'type' => 'user_followed',
+            'actor_id' => (int) $this->actor->id,
+            'actor_name' => $this->actor->name,
+            'actor_username' => $this->actor->username,
+            'message' => $label . ' started following you',
+            'url' => $this->actor->username ? '/@' . $this->actor->username : null,
+        ];
+    }
+}