Fix offscreen terminal helper PTY startup - #4233

Bugbot Analysis Progress (10m 28s elapsed)

✅ Gathered PR context (3s)
✅ Completed bug detection (10m 21s)
✅ Posted analysis results (4s)

Final Result: Bugbot completed review - no new issues found. 1 previously reported issue remain unresolved.

Request ID: serverGenReqId_42196ff9-bd9b-4c46-a275-8c76b67969c9