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/composables/useComponentEdit.ts

@@ -403,7 +403,7 @@ export function useComponentEdit(componentId: string) {
           ],
           { customFieldInputs, upsertCustomFieldValue, updateCustomFieldValue, toast },
         )
-        await router.push('/component-catalog')
+        toast.showSuccess('Composant mis à jour avec succès.')
       }
     }
     catch (error: any) {