Add standardized HTMX conventions, interaction patterns, and migration guide for ThrillWiki UX

backend/thrillwiki/urls.py

@@ -140,6 +140,15 @@ if settings.DEBUG:
     # Only serve static files, not media files since we're using Cloudflare Images
     urlpatterns += static(settings.STATIC_URL, document_root=settings.STATIC_ROOT)
 
+    # Design system test page (development only)
+    urlpatterns += [
+        path(
+            "design-system-test/",
+            TemplateView.as_view(template_name="tests/design-system-test.html"),
+            name="design_system_test",
+        ),
+    ]
+
     # Note: Media files are handled by Cloudflare Images, not Django static serving
     # This prevents the catch-all pattern from interfering with API routes