A duplicate work order number edit returns 422 DuplicateWoNumber from the
board PATCH endpoint, which mapped to the generic save-failed copy. Add the
code to the known validation copy map so edits reuse the same duplicate-WO
product text as create, and share the message constant across both paths.
Board create failures toasted the backend message verbatim, exposing
field names such as siteCode and vendorId from the inline row and the
wizard. Map known codes to product copy and fall back to generic copy
for every other failure.
