router: stellio wifi APs on wlan0/wlan1

One dual-band SSID "WhiteHouse" on lan (replaces the liminix router's
WhiteHouse/WhiteHouse-5), WPA3 transition, WiFi 6, old channels 2/36,
country TH. Band mapping wlan0=2g/wlan1=5g assumed from mt7986 phy
order; verify with `iw phy`.

inventories/router.nix

@@ -32,23 +32,50 @@ in
     # device tree in matthew-hardware: eth1 = the 2.5G "WAN" port, lan1 = the
     # 2.5G LAN port, lan2-lan5 = the 1G LAN ports (DSA on the MT7531 switch).
     roles.default.machines.stellio.settings = {
-      site = "w";
-      siteId = 1;
+      site = "white-house";
+      siteId = 8;
 
       # PPPoE on the ISP's VLAN 10, as on the liminix router it replaces
       # (routers/white-house); set to null if the ISP runs PPPoE untagged.
-      wan.interface = "eth1";
+      wan.interface = "end1";
       wan.vlanId = 10;
 
-      # 2.5G port carries all VLANs tagged (towards a managed switch / AP).
-      trunkPorts = [ "lan1" ];
-      # 1G ports: untagged client ports on lan, and one always-available
-      # untagged mgmt port for on-site recovery.
+      # lan1 (2.5G): untagged mgmt port for on-site recovery. lan2-lan4 (1G):
+      # untagged client ports on lan. lan5 is the pre-cutover staging uplink:
+      # DHCP client into the old LAN (routers/white-house), SSH only, no VLAN
+      # membership; set stagingPort = null at cutover.
       accessPorts = {
+        lan1 = "mgmt";
         lan2 = "lan";
         lan3 = "lan";
         lan4 = "lan";
-        lan5 = "mgmt";
+      };
+      stagingPort = "lan5";
+
+      # Both MT7976 radios broadcast the site SSID (same name and passphrase
+      # as the liminix router's "WhiteHouse"/"WhiteHouse-5", merged into one
+      # dual-band SSID) as an untagged access port on lan. Passphrase is the
+      # `wifi-WhiteHouse-passphrase` vars prompt. Channels as on the old
+      # router. Check the band mapping with `iw phy` (mt7986: phy0/wlan0 =
+      # 2.4 GHz, phy1/wlan1 = 5 GHz).
+      wifi = {
+        enable = true;
+        countryCode = "TH";
+        networks.WhiteHouse.vlan = "lan";
+        radios = {
+          wlan0 = {
+            band = "2g";
+            channel = 2;
+            wifi6 = true;
+            networks = [ "WhiteHouse" ];
+          };
+          wlan1 = {
+            band = "5g";
+            channel = 36;
+            wifi6 = true;
+            networks = [ "WhiteHouse" ];
+          };
+        };
       };
 
       # 10.1.<id>.0/24, router .1, DHCP pool .100-.199.