FiatPaymentAccountsRestApi POST endpoint should return server-generated account fields

[coderabbitai]

Context

During review of PR #4338 (#4338 (comment)), it was identified that the POST /payment-accounts/fiat endpoint returns the original input DTO instead of the created account with server-generated fields.

Issue

In FiatPaymentAccountsRestApi.addAccount(), the endpoint currently returns the incoming accountDto from the request. However, the actual created account has server-generated fields:

• id (generated via StringUtils.createUid())
• creationDate (generated via System.currentTimeMillis())

The response doesn't reflect these server-assigned values.

Proposed Solution

As suggested by @HenrikJannsen, the endpoint should reflect the Bisq 2 model 1:1 by:

1. Converting the created Account back to a DTO after accountService.addPaymentAccount(account)
2. Returning the mapped DTO that includes all server-generated fields

Related

• PR: chore/merge_lost_work_from_mobile_based_on_2.1.8 #4338
• Requested by: @rodvar
• File: api/src/main/java/bisq/api/rest_api/endpoints/payment_accounts/FiatPaymentAccountsRestApi.java

[rodvar]

@salottodev