Enable Carbasa webshop templates for Oscar

mandelstudio/settings/base.py

@@ -21,6 +21,7 @@ BASE_DIR = str(BASE_PATH)
 setup_search_paths("/etc/ocyan/", str(_project_app_path))
 
 from ocyan.main.settings import *  # pylint:disable=W0401,W0614
+from ocyan.core.fender import config as ocyan_config
 
 INSTALLED_APPS = [
     "mandelblog_content_guard.apps.MandelblogContentGuardConfig",
@@ -60,6 +61,21 @@ _ensure_required_app(
     "ocyan.plugin.coyote",
 )
 
+def _ensure_installed_app(app_label: str, *, before: str | None = None) -> None:
+    """Ensure an app is present in INSTALLED_APPS with optional ordering."""
+    if app_label in INSTALLED_APPS:
+        INSTALLED_APPS.remove(app_label)
+    if before and before in INSTALLED_APPS:
+        INSTALLED_APPS.insert(INSTALLED_APPS.index(before), app_label)
+    else:
+        INSTALLED_APPS.append(app_label)
+
+
+# Prefer Carbasa's webshop templates whenever this project runs as a webshop.
+# Ensures the full Carbasa webshop header (search, user bar, cart, megamenu).
+if ocyan_config.is_webshop and importlib.util.find_spec("ocyan.plugin.carbasa.webshop"):
+    _ensure_installed_app("ocyan.plugin.carbasa.webshop", before="ocyan.plugin.carbasa")
+
 # Keep Carbasa/Coyote defaults stable even when plugin settings are not
 # injected early enough during startup on this deployment.
 OXYAN_HEADER_OPTIONS = globals().get(