Keep the Wi-Fi icon steady on OWE transition-mode networks (#14133)

* Keep the Wi-Fi icon steady on OWE transition-mode networks

An OWE transition-mode network pairs an open SSID with a hidden "_owetm_"
twin on the same BSSID. Between scans NetworkManager reports the in-use
access point under the hidden SSID and drops the active profile from the
device's AvailableConnections, which is the only place Quickshell builds
known networks from. No listed network is then connected, so the bar fell
back to the disconnected icon until the next scan brought the open SSID
back, flickering on and off while the link stayed up.

Fall back to the Wi-Fi device's own connected state when no listed network
is connected, and read the in-use access point's strength from nmcli
(without a rescan) while the connected network has none of its own.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* Discard stale in-use AP reads and key Wi-Fi checks on the device

Bump a generation whenever the cached in-use access point strength stops
describing the link (leaving Wi-Fi or a device change), and drop any nmcli
read started before it, re-reading immediately instead of a full interval
later.

Key Wi-Fi connectivity checks on the device rather than the SSID, so the
listed network coming and going with each scan on an OWE transition-mode
network no longer schedules a check. A real network switch still passes
through "disconnected".

Add a QML fixture that runs the panel against a mocked device through the
scan churn, a mid-read disconnect, and a final disconnect.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

test/shell.d/network-test.sh

@@ -90,6 +90,27 @@ assertDeepEqual(
   'network parses bar status'
 )
 assertEqual(network.connectionIcon('wifi', 80), network.wifiIconFor(80), 'network maps wifi icon from signal')
+
+// OWE transition mode: between scans NetworkManager files the in-use access
+// point under the hidden "_owetm_" SSID and drops the active profile from the
+// device's AvailableConnections, so Quickshell lists no connected network. The
+// bar trusts the device's own state and reads the in-use AP's strength instead
+// of flickering to disconnected.
+const kindBinding = panelSource.match(/readonly property string kind: \{[\s\S]*?\n {2}\}/)
+assert(kindBinding, 'network has a kind binding')
+assert(/if \(wifiDevice && wifiDevice\.connected\) return "wifi"/.test(kindBinding[0]), 'network keeps showing Wi-Fi while the device is connected but no network is listed as connected')
+assert(
+  kindBinding[0].indexOf('connectedWifiNetwork) return "wifi"') < kindBinding[0].indexOf('wifiDevice.connected) return "wifi"'),
+  'network prefers the listed connected network before falling back to device state'
+)
+assertEqual(network.connectedSignalStrength(0.8, 40), 80, 'network prefers the connected network strength')
+assertEqual(network.connectedSignalStrength(0, 67), 67, 'network falls back to the in-use access point strength')
+assertEqual(network.connectedSignalStrength(0, -1), 0, 'network reports no strength when the in-use access point is unknown')
+assertEqual(network.parseActiveApSignal(' :82\n*:67\n :50\n'), 67, 'network parses the in-use access point strength from nmcli')
+assertEqual(network.parseActiveApSignal(' :82\n'), -1, 'network reports no in-use access point when none is marked')
+assertEqual(network.parseActiveApSignal(''), -1, 'network tolerates empty nmcli output')
+assert(/running: root\.needsActiveApSignal/.test(panelSource), 'network only polls the in-use access point while the connected network lacks a strength')
+assert(/"--rescan", "no"/.test(panelSource), 'network reads the in-use access point without triggering a scan')
 assertEqual(network.formatHeaderSpeed('1000'), '1gbit', 'network formats gigabit speed')
 assertEqual(network.formatHeaderSpeed('2500'), '2.5gbit', 'network formats fractional gigabit speed')
 assertEqual(network.formatHeaderFreq('2462'), '2.4ghz', 'network formats 2.4GHz wifi band')