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.

core/forms.py

@@ -1,4 +1,5 @@
 """Core forms and form components."""
+
 from django.conf import settings
 from django.core.exceptions import PermissionDenied
 from django.utils.translation import gettext_lazy as _
@@ -8,20 +9,23 @@ from autocomplete import Autocomplete
 
 class BaseAutocomplete(Autocomplete):
     """Base autocomplete class for consistent autocomplete behavior across the project.
-    
+
     This class extends django-htmx-autocomplete's base Autocomplete class to provide:
     - Project-wide defaults for autocomplete behavior
     - Translation strings
     - Authentication enforcement
     - Sensible search configuration
     """
+
     # Search configuration
     minimum_search_length = 2  # More responsive than default 3
     max_results = 10  # Reasonable limit for performance
 
     # UI text configuration using gettext for i18n
     no_result_text = _("No matches found")
-    narrow_search_text = _("Showing %(page_size)s of %(total)s matches. Please refine your search.")
+    narrow_search_text = _(
+        "Showing %(page_size)s of %(total)s matches. Please refine your search."
+    )
     type_at_least_n_characters = _("Type at least %(n)s characters...")
 
     # Project-wide component settings
@@ -30,10 +34,10 @@ class BaseAutocomplete(Autocomplete):
     @staticmethod
     def auth_check(request):
         """Enforce authentication by default.
-        
+
         This can be overridden in subclasses if public access is needed.
         Configure AUTOCOMPLETE_BLOCK_UNAUTHENTICATED in settings to disable.
         """
-        block_unauth = getattr(settings, 'AUTOCOMPLETE_BLOCK_UNAUTHENTICATED', True)
+        block_unauth = getattr(settings, "AUTOCOMPLETE_BLOCK_UNAUTHENTICATED", True)
         if block_unauth and not request.user.is_authenticated:
-            raise PermissionDenied(_("Authentication required"))
+            raise PermissionDenied(_("Authentication required"))