gluon-status-page: use ubus to get radio channels

Do not depend on the respondd-airtime module just to get the configured
channels. This removes the display of the frequency in addition to the
channel, as it is not readily available.

In addition, the translation string is improved to allow for text after
the channel number.

package/gluon-status-page/files/lib/gluon/status-page/view/status-page.html

@@ -29,17 +29,31 @@
 
 	local mesh = get_mesh()
 
-	local function get_interfaces()
-		local uconn = ubus.connect()
-		if not uconn then
-			error('failed to connect to ubus')
-		end
+	local function get_interfaces(uconn)
 		local interfaces = util.get_mesh_devices(uconn)
-		ubus.close(uconn)
 		table.sort(interfaces)
 		return interfaces
 	end
 
+	local function get_radios(uconn)
+		local radios = uconn:call("network.wireless", "status", {})
+		local ret = {}
+
+		for radio, info in pairs(radios) do
+			if info.up then
+				table.insert(ret, {
+					name = radio,
+					channel = info.config.channel,
+				})
+			end
+		end
+
+		table.sort(ret, function(a, b)
+			return a.name < b.name
+		end)
+		return ret
+	end
+
 	local function is_wireless(iface)
 		while true do
 			local pattern = '/sys/class/net/' .. iface .. '/lower_*'
@@ -52,7 +66,15 @@
 		return unistd.access('/sys/class/net/' .. iface .. '/wireless') ~= nil
 	end
 
-	local interfaces = get_interfaces()
+	local uconn = ubus.connect()
+	if not uconn then
+		error('failed to connect to ubus')
+	end
+
+	local interfaces = get_interfaces(uconn)
+	local radios = get_radios(uconn)
+
+	ubus.close(uconn)
 
 	local function sorted(t)
 		t = {unpack(t)}
@@ -195,11 +217,17 @@ <h3><%:Clients%></h3>
 					<tr><th><%:Wireless 2.4 GHz%></th><td><%= statistics('clients/wifi24') %></td></tr>
 					<tr><th><%:Wireless 5 GHz%></th><td><%= statistics('clients/wifi5') %></td></tr>
 				</table>
-				<div id="radios" style="display: none">
+				<% if radios[1] then -%>
 					<h3><%:Radios%></h3>
-					<table id="radio-devices">
+					<table>
+						<% for _, radio in ipairs(radios) do -%>
+							<tr>
+								<th><%| radio.name %></th>
+								<td><%| translatef('Channel %u', radio.channel) %></td>
+							</tr>
+						<%- end %>
 					</table>
-				</div>
+				<%- end %>
 
 				<h3><%:Traffic%></h3>
 				<table>