Fix admin login 500 when clients omit the trailing slash.

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

api/tests.py

@@ -3,6 +3,7 @@ from datetime import timedelta
 
 from django.contrib.auth import get_user_model
 from django.core.files.uploadedfile import SimpleUploadedFile
+from django.test import override_settings
 from django.utils import timezone
 from PIL import Image
 from rest_framework import status
@@ -343,6 +344,26 @@ class AdminLoginAPITests(APITestCase):
         self.assertIn('token', response.data)
         self.assertEqual(response.data['user']['username'], self.admin_username)
 
+    def test_admin_login_without_trailing_slash(self):
+        """Axios/fetch omit the slash; this used to 500 with APPEND_SLASH + DEBUG."""
+        response = self.client.post(
+            '/api/admin/login',
+            {'username': self.admin_username, 'password': self.admin_password},
+            format='json',
+        )
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertIn('token', response.data)
+
+    def test_admin_login_without_trailing_slash_debug(self):
+        with override_settings(DEBUG=True):
+            response = self.client.post(
+                '/api/admin/login',
+                {'username': self.admin_username, 'password': self.admin_password},
+                format='json',
+            )
+        self.assertEqual(response.status_code, status.HTTP_200_OK)
+        self.assertIn('token', response.data)
+
     def test_admin_login_wrong_password(self):
         response = self.client.post(
             '/api/admin/login/',