refactor: enhance channel message handling with dual-mode support for legacy and target channels

pocketcontrol.lua

@@ -579,7 +579,9 @@ parallel.waitForAny(
         while true do
             local event, side, channel, replyChannel, message = os.pullEvent("modem_message")
             
-            if channel == STATUS_CHANNEL and type(message) == "table" then
+            -- Uses Channels.match() for dual-mode safety: accepts messages on
+            -- both legacy (102/103) and target (4212/4213) channels during migration.
+            if Channels.match('remoteturtle.status', channel) and type(message) == "table" then
                 if message.type == "status" then
                     -- Update turtle list
                     local found = false
@@ -595,7 +597,7 @@ parallel.waitForAny(
                         addLog("Turtle #" .. message.turtleID .. " connected", colors.lime)
                     end
                 end
-            elseif channel == POCKET_CHANNEL and type(message) == "table" then
+            elseif Channels.match('remoteturtle.pocket', channel) and type(message) == "table" then
                 -- Handle responses from webbridge
                 if message.type == "webbridge_status" then
                     webbridgeStatus = message.data