Currently, when a user clicks the 'Copy' button in various parts of the Zabbix frontend (for example: item test form, API tokens and MediaType -> Oatuh configuration), there is no visual indication that the value has actually been copied to the clipboard.

This may create uncertainty for the user, specially in cases where the copied value is critical (API tokens), or when the browser silently restricts clipboard access.

Current behavior:

Prototype: