New RPC methods:
- openwrt.scan-wifi: triggers iwinfo scan on the router radio,
returns networks sorted by signal strength
- openwrt.configure-wan: creates UCI wireless.wwan (sta mode) +
network.wwan (DHCP) + adds wwan to firewall WAN zone, then
calls `wifi reload`
get-status now includes a `wan` object with configured/ssid/ip/
internet fields so the UI can show current uplink state.
Frontend WAN panel: scan → pick SSID (signal bars) → enter password
→ apply. Shows "Configure WAN first" hint above TollGate install
button when internet is not available.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>