feat: add time zone support for rent payment and refund processes

- Updated API requests and responses to include time zone information.
- Modified backend services to handle time zone for received and refunded dates.
- Adjusted frontend components to use local date formatting based on the user's time zone.
- Enhanced tests to validate time zone handling in rent payment and refund scenarios.

frontend/src/app/components/rent-payment-refund-dialog/rent-payment-refund-dialog.ts

@@ -14,7 +14,7 @@ import { MatInputModule } from '@angular/material/input';
 import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
 import { finalize } from 'rxjs';
 import { httpErrorMessage } from '../../services/http-error-message';
-import { formatEuro, utcIsoDate } from '../../services/rent-payment-format';
+import { browserTimeZone, formatEuro, localIsoDate } from '../../services/rent-payment-format';
 import { RentPayment, RentPaymentService } from '../../services/rent-payment.service';
 import { isRentPaymentDataStale, RENT_PAYMENT_DATA_STALE } from '../rent-payment-dialog-result';
 
@@ -36,7 +36,7 @@ export class RentPaymentRefundDialog {
   private readonly dialogRef = inject(MatDialogRef<RentPaymentRefundDialog>);
   private readonly payments = inject(RentPaymentService);
   private readonly operationId = crypto.randomUUID();
-  readonly today = utcIsoDate();
+  readonly today = localIsoDate();
   readonly saving = signal(false);
   readonly error = signal('');
   readonly formatEuro = formatEuro;
@@ -65,6 +65,7 @@ export class RentPaymentRefundDialog {
       .refund(this.payment.id, {
         operationId: this.operationId,
         paymentVersion: this.payment.version,
+        timeZone: browserTimeZone,
         ...this.form.getRawValue(),
       })
       .pipe(finalize(() => this.saving.set(false)))