fix(navigation) : use router.replace after entity creation

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

app/pages/pieces/create.vue

@@ -466,7 +466,7 @@ const submitCreation = async () => {
         selectedDocuments.value = []
       }
       toast.showSuccess('Pièce créée avec succès')
-      await router.push(`/pieces/${createdPiece.id}/edit`)
+      await router.replace(`/pieces/${createdPiece.id}/edit`)
     } else if (result.error) {
       toast.showError(result.error)
     }