fix(ui) : show type name and ref in slot selects, stay on page after save

- PieceSelect, ProductSelect, ComposantSelect: show type name and
  "Ref." prefix in dropdown descriptions (matching create page format)
- Category edit pages (component, piece, product): stay on page after
  successful save instead of navigating back to list
- Component and product edit pages: same — stay on page after save

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/pages/product/[id]/edit.vue

@@ -482,7 +482,6 @@ const submitEdition = async () => {
         return
       }
       toast.showSuccess('Produit mis à jour avec succès')
-      await router.push('/product-catalog')
     }
   } catch (error: any) {
     toast.showError(humanizeError(error?.message) || 'Impossible de mettre à jour le produit')