feat(web): copiar de / a entre movimientos de inventario (solicitud de traslado → transferencia de stock)

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

apps/web/src/app/features/documents/document-form.page.html

@@ -55,10 +55,10 @@
     <button sboActions class="btn" type="button" (click)="reload()">Recargar</button>
   }
   <a sboActions class="btn" routerLink="..">{{ readOnly() ? 'Cerrar' : 'Cancelar' }}</a>
-  @if (partner && copyFromItems().length) {
+  @if (copyFromItems().length) {
     <sbo-menu-button sboActionsEnd label="Copiar de" [items]="copyFromItems()" (picked)="copyFrom($event)" />
   }
-  @if (partner && copyToItems().length) {
+  @if (copyToItems().length) {
     <sbo-menu-button sboActionsEnd label="Copiar a" [items]="copyToItems()" (picked)="copyTo($event)" />
   }
 </sbo-window>