undo (#18147)

packages/cli/src/ui/AppContainer.tsx

@@ -141,6 +141,7 @@ import { LoginWithGoogleRestartDialog } from './auth/LoginWithGoogleRestartDialo
 import { NewAgentsChoice } from './components/NewAgentsNotification.js';
 import { isSlashCommand } from './utils/commandUtils.js';
 import { useTerminalTheme } from './hooks/useTerminalTheme.js';
+import { isITerm2 } from './utils/terminalUtils.js';
 
 function isToolExecuting(pendingHistoryItems: HistoryItemWithoutId[]) {
   return pendingHistoryItems.some((item) => {
@@ -1472,7 +1473,10 @@ Logging in with Google... Restarting Gemini CLI to continue.
         setShowErrorDetails((prev) => !prev);
         return true;
       } else if (keyMatchers[Command.SUSPEND_APP](key)) {
-        handleWarning('Undo has been moved to Cmd + Z or Alt/Opt + Z');
+        const undoMessage = isITerm2()
+          ? 'Undo has been moved to Option + Z'
+          : 'Undo has been moved to Alt/Option + Z or Cmd + Z';
+        handleWarning(undoMessage);
         return true;
       } else if (keyMatchers[Command.SHOW_FULL_TODOS](key)) {
         setShowFullTodos((prev) => !prev);