The Current App sensor already resolved through the shared
`resolve_app_name` chain, so the package-id live symptom was never a
missing tier — it was the label path being silenced (fix in the previous
commit). Its docstrings now say so explicitly: `_package` is the app on
screen (protocol push → ADB mResumedActivity → recents as a last resort)
and `native_value` resolves exactly that package's map entry or cached
device label, which is why the label fetch must be driven off it. The
behaviour is unchanged; the comment is what was missing.
James Mackay
85e96f3c60