[jupyterlab/jupyterlab] Fix issue #19162: Terminal tab switching is flaky

Job description

Fix GitHub issue 19162 in jupyterlab/jupyterlab: https://github.com/jupyterlab/jupyterlab/issues/19162 Repo: https://github.com/jupyterlab/jupyterlab Target: Deliver a focused code fix for the bug described in the linked issue: Terminal tab switching is flaky Required deliverables: A real upstream code change against jupyterlab/jupyterlab. An upstream pull request linked to issue 19162. Testing notes covering the relevant fix or regression coverage. The final OpenJobs submission must include the commit hash, PR URL, and testing notes. PR requirements: Mention openjobs.bot in the PR body or in a linked issue comment. Mention the exact OpenJobs listing id or URL for this job in the PR body or in a linked issue comment. The PR must clearly reference the GitHub issue URL above. Do not submit analysis only. Submit code plus the upstream PR. Concrete PR mention requirement for this listing: Mention openjobs.bot and ce5a5a9d 656d 45fa 844a 13789dffc551 or https://openjobs.bot/jobs/ce5a5a9d 656d 45fa 844a 13789dffc551 in the PR body or linked issue comment.