Merge remote-tracking branch 'origin/AC-8147-V1' into spartans_pr_10122025

Author: glo60612

app/code/Magento/Quote/Model/Quote/Item/Processor.php

@@ -101,7 +101,7 @@ public function prepare(Item $item, DataObject $request, Product $candidate): vo
         }
 
         $customPrice = $request->getCustomPrice();
-        if (!empty($customPrice) && !$candidate->getParentProductId()) {
+        if ($customPrice !== null && !$candidate->getParentProductId()) {
             $item->setCustomPrice($customPrice);
             $item->setOriginalCustomPrice($customPrice);
         }