fix: guard debug_toolbar import for environments without dev extras

Guard debug_toolbar imports in both local.py and urls.py with
ModuleNotFoundError checks scoped to the debug_toolbar module name.
This prevents startup failures in CI and Docker where dev extras
aren't installed, while still surfacing real import errors from
within debug_toolbar itself (e.g. missing transitive dependencies).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: JacobCoffee

pydotorg/settings/local.py

@@ -25,13 +25,19 @@
 EMAIL_BACKEND = "django.core.mail.backends.console.EmailBackend"
 
 
-INSTALLED_APPS += [
-    "debug_toolbar",
-]
-
-MIDDLEWARE += [
-    "debug_toolbar.middleware.DebugToolbarMiddleware",
-]
+try:
+    import debug_toolbar  # noqa: F401
+
+    INSTALLED_APPS += [
+        "debug_toolbar",
+    ]
+
+    MIDDLEWARE += [
+        "debug_toolbar.middleware.DebugToolbarMiddleware",
+    ]
+except ModuleNotFoundError as exc:
+    if exc.name != "debug_toolbar":
+        raise
 
 CACHES = {
     "default": {

pydotorg/urls.py

@@ -73,6 +73,10 @@
 
 if settings.DEBUG:
     urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
-    import debug_toolbar
+    try:
+        import debug_toolbar
 
-    urlpatterns = [path("__debug__/", include(debug_toolbar.urls)), *urlpatterns]
+        urlpatterns = [path("__debug__/", include(debug_toolbar.urls)), *urlpatterns]
+    except ModuleNotFoundError as exc:
+        if exc.name != "debug_toolbar":
+            raise