## What changed
Add `configured TUI mode` to the configuration details in human-readable and JSON doctor reports. Report `fullscreen` when `tui.fullscreen_transcript` is enabled and `scrollback` when it is disabled.
## Testing
Add an integration test covering both configuration values in JSON output and update the human-readable report snapshot to include the mode.
GitOrigin-RevId: beb62ddfa62a3516a64b5a69d5a41b257434f5d5