fix(charges): normalize chargeId, skip invalid charges, and preserve UI charge fields to fix preview errors and disbursement failures (#2822)

improve the line is missing the empty string fallback present

src/app/loans/loans.service.ts

@@ -642,11 +642,31 @@ export class LoansService {
   ): any {
     const loansAccountData = {
       ...loansAccount,
-      charges: loansAccount.charges.map((charge: any) => ({
-        chargeId: charge.id,
-        amount: charge.amount,
-        dueDate: charge.dueDate && this.dateUtils.formatDate(charge.dueDate, dateFormat)
-      })),
+      charges: (loansAccount.charges ?? [])
+        .map((charge: any) => {
+          const chargeId = charge.chargeId ?? charge.id;
+          if (chargeId == null) {
+            return null;
+          }
+          const mappedCharge: any = {
+            chargeId,
+            amount: charge.amount
+          };
+          if (charge.id && charge.id !== chargeId) {
+            mappedCharge.id = charge.id;
+          }
+          if (charge.dueDate) {
+            mappedCharge.dueDate = this.dateUtils.formatDate(charge.dueDate, dateFormat);
+          }
+          if (charge.feeInterval !== undefined) {
+            mappedCharge.feeInterval = charge.feeInterval;
+          }
+          if (charge.feeOnMonthDay !== undefined) {
+            mappedCharge.feeOnMonthDay = charge.feeOnMonthDay;
+          }
+          return mappedCharge;
+        })
+        .filter(Boolean),
       disbursementData: loansAccount.disbursementData.map((item: any) => ({
         expectedDisbursementDate: this.dateUtils.formatDate(item.expectedDisbursementDate, dateFormat),
         principal: item.principal