Handle null sales channel entries in product list and detail views

Filter out null entries from sales_channels arrays before rendering.
When a sales channel is deleted without cleaning up the join table,
the API returns null entries that crash the Admin UI with TypeError.

Author: moktamd

.changeset/fix-product-list-null-sales-channel.md

@@ -0,0 +1,5 @@
+---
+"@medusajs/dashboard": patch
+---
+
+fix(@medusajs/dashboard): handle null sales channel entries in product list and detail views

packages/admin/dashboard/src/components/table/table-cells/product/sales-channels-cell/sales-channels-cell.tsx

@@ -13,8 +13,6 @@ export const SalesChannelsCell = ({
 }: SalesChannelsCellProps) => {
   const { t } = useTranslation()
 
-  // Filter out null/undefined entries that can occur when a sales channel
-  // is deleted but the product association is not cleaned up
   const validChannels = salesChannels?.filter(
     (sc): sc is SalesChannelDTO => sc != null
   )

packages/admin/dashboard/src/routes/products/product-detail/components/product-sales-channel-section/product-sales-channel-section.tsx

@@ -20,7 +20,7 @@ export const ProductSalesChannelSection = ({
   // is deleted but the product association is not cleaned up
   const availableInSalesChannels =
     product.sales_channels
-      ?.filter((sc) => sc != null)
+      ?.filter((sc): sc is HttpTypes.AdminProductSalesChannel => sc != null)
       .map((sc) => ({
         id: sc.id,
         name: sc.name,