get_wan_status now returns: radio0_disabled, sta_iface (from iw dev),
sta_state (operstate), assoc_ssid (actually associated SSID vs
configured), and recent wifi_log lines from logread. The WAN panel
shows a diagnostic grid when configured but not connected so the user
can see exactly what's wrong without digging into server logs.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>