feat(web): asiento nuevo con todas las fechas de hoy y pregunta antes de pasar el vencimiento de la cabecera a las líneas

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

apps/web/src/app/features/banking/payment-form.page.ts

@@ -5,7 +5,7 @@ import { ActivatedRoute, Router, RouterLink } from '@angular/router';
 import type { SlListResponse } from '@basic-erp/sap-types';
 import { map } from 'rxjs';
 import { API_URL, apiErrorMessage } from '../../core/api';
-import { formatNumber } from '../../core/format';
+import { formatNumber, todayIso } from '../../core/format';
 import { SlDocumentApi } from '../../core/sl/sl-document';
 import { DateField, LookupField, NumberField, SelectField, TextField, TextareaField } from '../../shared/form';
 import type { DetailColumn } from '../../shared/grid/grid.types';
@@ -21,7 +21,7 @@ import type { PaymentDocType, PaymentScreen } from './payment-types';
 type Row = Record<string, unknown>;
 
 const text = (v: unknown): string => (v === null || v === undefined ? '' : String(v));
-const today = (): string => new Date().toISOString().slice(0, 10);
+const today = (): string => todayIso();
 const dateOnly = (v: unknown): string => (typeof v === 'string' ? v.slice(0, 10) : '');
 const money = (n: number): string => formatNumber(n, 2);