* Stop closed network panels from leaving Wi-Fi scanning enabled
refresh() defaults scanWifi to false and its no-scan branch enabled the
scanner unconditionally. Five paths reach it with no panel on screen —
Component.onCompleted, clearNetworkAction(), failNetworkAction(), the
band-change actionProc exit, and the 30s actionTimeout — so the scanner
stayed on and Quickshell kept re-arming RequestScan behind a closed panel.
scanRestart had the mirror gap: it enabled the scanner 100ms after
refresh(true) without re-checking that the panel was still open.
Every sweep takes the radio off the operating channel, so this degraded
the link it was scanning from: one sweep every 17s, gateway RTT rising
from ~2ms to repeated 150ms+ spikes on an otherwise idle connection.
Gate the scanner block on the panel being open, cancel a pending restart
on close and re-check the panel when it fires, and track the WifiDevice
this instance enabled so close, device replacement and destruction
release the right object. Destruction matters on its own: a bar reload
with the panel open would otherwise die with opened still true and never
write scannerEnabled = false.
* Cover the scanner ownership helper's own invariants
The previous assertion only pinned that no write bypasses
setScannerEnabled(); it said nothing about what the helper does. Dropping
either the opened gate or the release-before-adopt from the helper still
passed, while a closed instance could reclaim scanning and a device swap
could leave the previous interface scanning.
Run the helper's actual JavaScript against stand-in devices instead,
following the extract-and-eval pattern the agents panel tests already use.
Removing either invariant now fails its own assertion.
