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.

moderation/context_processors.py

@@ -1,26 +1,24 @@
 def moderation_access(request):
     """Add moderation access check to template context"""
     context = {
-        'has_moderation_access': False,
-        'has_admin_access': False,
-        'has_superuser_access': False,
-        'user_role': None
+        "has_moderation_access": False,
+        "has_admin_access": False,
+        "has_superuser_access": False,
+        "user_role": None,
     }
-    
+
     if request.user.is_authenticated:
-        context['user_role'] = request.user.role
+        context["user_role"] = request.user.role
         # Check both role-based and Django's built-in superuser status
-        context['has_moderation_access'] = (
-            request.user.role in ['MODERATOR', 'ADMIN', 'SUPERUSER'] or 
-            request.user.is_superuser
+        context["has_moderation_access"] = (
+            request.user.role in ["MODERATOR", "ADMIN", "SUPERUSER"]
+            or request.user.is_superuser
         )
-        context['has_admin_access'] = (
-            request.user.role in ['ADMIN', 'SUPERUSER'] or 
-            request.user.is_superuser
+        context["has_admin_access"] = (
+            request.user.role in ["ADMIN", "SUPERUSER"] or request.user.is_superuser
         )
-        context['has_superuser_access'] = (
-            request.user.role == 'SUPERUSER' or 
-            request.user.is_superuser
+        context["has_superuser_access"] = (
+            request.user.role == "SUPERUSER" or request.user.is_superuser
         )
-    
+
     return context