Build the username/password config fields + the save-credentials checkbox. Built in onScreenShown (not init) so the prefilled username (from the route context when a user was picked in UserSelect, else the saved username setting) is set BEFORE configItems is assigned (ConfigList snapshots on assignment, so a later value write would not display). Guarded to build once.

Submit pressed: publish the entered credentials + save flag, emit the intent. The coordinator (loginRouter.onCredentialsSubmitted) runs the blocking getToken.

onDestroy: Full teardown releasing all resources before component removal Called automatically via JRScreen.beforeViewClose when sgRouter permanently closes this view.

JRScreen hook.