save saving ui update and current account update priview section

src/app/savings/savings-account-stepper/savings-account-details-step/savings-account-details-step.component.ts

@@ -416,7 +416,9 @@ export class SavingsAccountDetailsStepComponent implements OnInit {
           cifNumber: this.primaryClientCif,
           sharePercentage: this.primaryHolderShare,
           isMandatory: true,
-          isPrimary: true
+          isPrimary: true,
+          signingAuthority: 'Mandatory',
+          role: 'Primary Account Holder'
         },
         ...this.jointHolders.map((h) => ({
           clientId: h.clientId,
@@ -425,8 +427,8 @@ export class SavingsAccountDetailsStepComponent implements OnInit {
           sharePercentage: h.sharePercentage,
           isPrimary: false,
           isMandatory: h.isMandatory,
-          signingAuthority: h.signingAuthority || null,
-          role: h.role || null
+          signingAuthority: h.signingAuthority || (h.isMandatory ? 'Mandatory' : 'Optional'),
+          role: h.role || 'Co-Holder'
         }))
       ];
     }