fix settings editor crash on product pages

The provider_label function was accessing product.provider_type but
that field is on the provider_connection association, not the product
itself. Handle the case where the association may not be preloaded.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

lib/berrypod_web/components/shop_components/settings_editor.ex

@@ -265,10 +265,17 @@ defmodule BerrypodWeb.ShopComponents.SettingsEditor do
   end
 
   defp provider_label(product) do
-    case product.provider_type do
+    # provider_type is on the association, not the product itself
+    provider_type =
+      case product do
+        %{provider_connection: %{provider_type: type}} when is_binary(type) -> type
+        _ -> nil
+      end
+
+    case provider_type do
       "printify" -> "Printify"
       "printful" -> "Printful"
-      _ -> "Unknown"
+      _ -> "Print provider"
     end
   end