KDS: show items with no station assignment in every station filter

Items with NULL StationID now appear in all station views instead of
being hidden when a specific station is selected.

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

api/orders/listForKDS.cfm

@@ -79,7 +79,7 @@
       INNER JOIN OrderLineItems oli ON oli.OrderID = o.ID
       INNER JOIN Items i ON i.ID = oli.ItemID
       WHERE #whereSQL#
-        AND i.StationID = ?
+        AND (i.StationID = ? OR i.StationID IS NULL)
         AND oli.IsDeleted = b'0'
       ORDER BY SubmittedOn ASC, o.ID ASC
     ", stationParams, { datasource = "payfrit" })>