E-Mail-Praeferenzen: Opt-out je Mail-Typ + One-Click-Unsubscribe ohne Login

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Models/User.php

@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use App\Enums\EmailNotificationType;
 use App\Enums\Portal;
 use App\Enums\RegistrationType;
 use App\Enums\Tier;
@@ -367,6 +368,33 @@ class User extends Authenticatable implements MustVerifyEmail
         return $this->hasMany(NewsletterSubscription::class);
     }
 
+    public function emailNotificationOptOuts(): HasMany
+    {
+        return $this->hasMany(EmailNotificationOptOut::class);
+    }
+
+    /**
+     * Versand-Gate für Benachrichtigungs-Mails: Vor jedem Versand eines
+     * abbestellbaren Mail-Typs prüfen, ob der Empfänger ihn abbestellt hat
+     * (One-Click-Unsubscribe aus der Mail oder Präferenzen im Profil).
+     */
+    public function wantsEmailNotification(EmailNotificationType $type): bool
+    {
+        return ! $this->emailNotificationOptOuts()
+            ->where('type', $type->value)
+            ->exists();
+    }
+
+    public function optOutOfEmailNotification(EmailNotificationType $type): void
+    {
+        $this->emailNotificationOptOuts()->firstOrCreate(['type' => $type->value]);
+    }
+
+    public function optIntoEmailNotification(EmailNotificationType $type): void
+    {
+        $this->emailNotificationOptOuts()->where('type', $type->value)->delete();
+    }
+
     public function billingAddress(): HasOne
     {
         return $this->hasOne(BillingAddress::class);