feat: Add preset shift templates, admin SMTP settings, test email dispatch, and email verification opt-out option

backend/apps/users/models.py

@@ -39,6 +39,7 @@ class RegistrationDomainRule(models.Model):
 class RegistrationRestrictionSetting(models.Model):
     is_restriction_enabled = models.BooleanField(default=False)
     require_admin_approval = models.BooleanField(default=False, help_text="Neue Registrierungen müssen von einem Admin freigeschaltet werden")
+    require_email_verification = models.BooleanField(default=True, help_text="E-Mail Bestätigungslink für neue Konten erforderlich")
 
     @classmethod
     def get_solo(cls):
@@ -46,7 +47,25 @@ class RegistrationRestrictionSetting(models.Model):
         return obj
 
     def __str__(self):
-        return f"Domain-Einschränkung: {self.is_restriction_enabled}, Admin-Freischaltung: {self.require_admin_approval}"
+        return f"Domain-Einschränkung: {self.is_restriction_enabled}, Admin-Freischaltung: {self.require_admin_approval}, E-Mail-Pflicht: {self.require_email_verification}"
+
+class SMTPSetting(models.Model):
+    is_active = models.BooleanField(default=False, help_text="SMTP-Versand aktivieren")
+    host = models.CharField(max_length=255, default="smtp.example.com")
+    port = models.IntegerField(default=587)
+    username = models.CharField(max_length=255, blank=True, default="")
+    password = models.CharField(max_length=255, blank=True, default="")
+    use_tls = models.BooleanField(default=True)
+    use_ssl = models.BooleanField(default=False)
+    from_email = models.EmailField(default="noreply@schichtplaner.local")
+
+    @classmethod
+    def get_solo(cls):
+        obj, _ = cls.objects.get_or_create(pk=1)
+        return obj
+
+    def __str__(self):
+        return f"SMTP {self.host}:{self.port} ({'Aktiv' if self.is_active else 'Inaktiv'})"
 
 class EmailVerificationToken(models.Model):
     token = models.UUIDField(default=uuid.uuid4, unique=True, editable=False)