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

backend/apps/users/tests.py

@@ -2,7 +2,7 @@ from django.test import TestCase
 from django.contrib.auth import get_user_model
 from rest_framework.test import APIClient
 from rest_framework import status
-from .models import RegistrationDomainRule, RegistrationRestrictionSetting, EmailVerificationToken
+from .models import RegistrationDomainRule, RegistrationRestrictionSetting, EmailVerificationToken, SMTPSetting
 from apps.events.models import Event, TaskArea, Shift, ShiftSignup
 
 User = get_user_model()
@@ -74,6 +74,30 @@ class UserRegistrationTests(TestCase):
         self.assertEqual(res_login_ok.status_code, status.HTTP_200_OK)
         self.assertIn('token', res_login_ok.data)
 
+    def test_email_verification_opt_out(self):
+        # Set require_email_verification to False (Opt-Out)
+        setting = RegistrationRestrictionSetting.get_solo()
+        setting.require_email_verification = False
+        setting.save()
+
+        # Register user with Opt-Out
+        res_reg = self.client.post('/api/users/register/', {
+            'username': 'optout_user',
+            'email': 'optout@example.com',
+            'password': 'password123',
+            'display_name': 'Opt-Out User'
+        })
+        self.assertEqual(res_reg.status_code, status.HTTP_201_CREATED)
+        self.assertIn('token', res_reg.data)
+        self.assertFalse(res_reg.data.get('requires_verification'))
+
+        # Immediate login works
+        res_login = self.client.post('/api/users/login/', {
+            'username': 'optout_user',
+            'password': 'password123'
+        })
+        self.assertEqual(res_login.status_code, status.HTTP_200_OK)
+
     def test_guest_shift_claiming_on_registration(self):
         # Create event, task area, shift
         event = Event.objects.create(title="Test Event", start_date="2026-08-01", end_date="2026-08-02")
@@ -169,3 +193,25 @@ class UserRegistrationTests(TestCase):
         self.assertIsNotNone(signup.user)
         self.assertEqual(signup.user.username, 'erika_muster')
         self.assertIsNone(signup.guest_name)
+
+    def test_smtp_settings_configuration(self):
+        admin = User.objects.create_superuser(username='smtp_admin', email='smtp@test.com', password='password123')
+        self.client.force_authenticate(user=admin)
+
+        # GET SMTP setting
+        res_get = self.client.get('/api/users/smtp-setting/')
+        self.assertEqual(res_get.status_code, status.HTTP_200_OK)
+        self.assertFalse(res_get.data['is_active'])
+
+        # UPDATE SMTP setting
+        res_post = self.client.post('/api/users/smtp-setting/', {
+            'is_active': True,
+            'host': 'smtp.mailtrap.io',
+            'port': 2525,
+            'username': 'test_user',
+            'password': 'test_password',
+            'from_email': 'noreply@test.de'
+        }, format='json')
+        self.assertEqual(res_post.status_code, status.HTTP_200_OK)
+        self.assertTrue(res_post.data['is_active'])
+        self.assertEqual(res_post.data['host'], 'smtp.mailtrap.io')