feat(ui): move user identity display to header (#18216)

packages/cli/src/ui/components/AppHeader.tsx

@@ -7,6 +7,7 @@
 import { Box } from 'ink';
 import { Header } from './Header.js';
 import { Tips } from './Tips.js';
+import { UserIdentity } from './UserIdentity.js';
 import { useSettings } from '../contexts/SettingsContext.js';
 import { useConfig } from '../contexts/ConfigContext.js';
 import { useUIState } from '../contexts/UIStateContext.js';
@@ -40,6 +41,9 @@ export const AppHeader = ({ version }: AppHeaderProps) => {
           )}
         </>
       )}
+      {settings.merged.ui.showUserIdentity !== false && (
+        <UserIdentity config={config} />
+      )}
       {!(settings.merged.ui.hideTips || config.getScreenReader()) &&
         showTips && <Tips config={config} />}
     </Box>