feat(web): fila del flete (gastos adicionales) y toolbar de ancho completo; la configuración de pantallas se carga en diferido

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

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

@@ -76,7 +76,7 @@ describe('DocumentFormPage', () => {
       expect(el().querySelector('.badge.tone-ok')?.textContent?.trim()).toBe('Abierto');
       expect(el().querySelector('h1')?.textContent).toContain('1041');
       expect(el().querySelectorAll('tbody tr').length).toBeGreaterThanOrEqual(1);
-      expect(page().totals()).toEqual({ subtotal: 200, discount: 0, net: 200, tax: 38, total: 238 });
+      expect(page().totals()).toEqual({ subtotal: 200, discount: 0, net: 200, tax: 38, freight: 0, total: 238 });
       expect(buttonText()).toContain('Actualizar');
     });