Refactor test utilities and enhance ASGI settings

- Cleaned up and standardized assertions in ApiTestMixin for API response validation.
- Updated ASGI settings to use os.environ for setting the DJANGO_SETTINGS_MODULE.
- Removed unused imports and improved formatting in settings.py.
- Refactored URL patterns in urls.py for better readability and organization.
- Enhanced view functions in views.py for consistency and clarity.
- Added .flake8 configuration for linting and style enforcement.
- Introduced type stubs for django-environ to improve type checking with Pylance.

accounts/management/commands/setup_groups.py

@@ -1,26 +1,26 @@
 from django.core.management.base import BaseCommand
-from django.contrib.auth.models import Group, Permission
-from django.contrib.contenttypes.models import ContentType
+from django.contrib.auth.models import Group
 from accounts.models import User
 from accounts.signals import create_default_groups
 
+
 class Command(BaseCommand):
-    help = 'Set up default groups and permissions for user roles'
+    help = "Set up default groups and permissions for user roles"
 
     def handle(self, *args, **options):
-        self.stdout.write('Creating default groups and permissions...')
-        
+        self.stdout.write("Creating default groups and permissions...")
+
         try:
             # Create default groups with permissions
             create_default_groups()
-            
+
             # Sync existing users with groups based on their roles
             users = User.objects.exclude(role=User.Roles.USER)
             for user in users:
                 group = Group.objects.filter(name=user.role).first()
                 if group:
                     user.groups.add(group)
-                    
+
                     # Update staff/superuser status based on role
                     if user.role == User.Roles.SUPERUSER:
                         user.is_superuser = True
@@ -28,15 +28,22 @@ class Command(BaseCommand):
                     elif user.role in [User.Roles.ADMIN, User.Roles.MODERATOR]:
                         user.is_staff = True
                     user.save()
-            
-            self.stdout.write(self.style.SUCCESS('Successfully set up groups and permissions'))
-            
+
+            self.stdout.write(
+                self.style.SUCCESS("Successfully set up groups and permissions")
+            )
+
             # Print summary
             for group in Group.objects.all():
-                self.stdout.write(f'\nGroup: {group.name}')
-                self.stdout.write('Permissions:')
+                self.stdout.write(f"\nGroup: {group.name}")
+                self.stdout.write("Permissions:")
                 for perm in group.permissions.all():
-                    self.stdout.write(f'  - {perm.codename}')
-                
+                    self.stdout.write(f"  - {perm.codename}")
+
         except Exception as e:
-            self.stdout.write(self.style.ERROR(f'Error setting up groups: {str(e)}'))
+            self.stdout.write(
+                self.style.ERROR(
+                    f"Error setting up groups: {
+                        str(e)}"
+                )
+            )