ui: statement details page incorrectly sets appNames as (unset) in the stmt details request #83002
Description
The statement details page does not properly handle the unset application name.
Currently, the page sets appNames in the request for statement fingerprint details as (unset) when it should be empty string, since we use (unset) in the ui to signal the application name as the empty string. This leads to the server not being able to find the data for the requested statement fingerprint id.
Jira issue: CRDB-16792