refactor: replace hardcoded channel IDs with dynamic retrieval from platform.channels

turtle.lua

@@ -3,9 +3,11 @@
 -- This script only handles: eval execution, status broadcasting,
 -- GPS tracking, inventory/peripheral events.
 
-local CHANNEL_RECEIVE = 100
-local CHANNEL_SEND = 101
-local STATUS_CHANNEL = 102
+local Channels = require('platform.channels')
+
+local CHANNEL_RECEIVE = Channels.get('remoteturtle.command')
+local CHANNEL_SEND    = Channels.get('remoteturtle.response')
+local STATUS_CHANNEL  = Channels.get('remoteturtle.status')
 
 -- State tracking (lightweight - server drives everything)
 local state = {
@@ -23,11 +25,13 @@ local config = {
 }
 
 -- Check for modem
-local modem = peripheral.find("modem")
+local WebBridge = require('platform.webbridge')
+local modem, modemSide = WebBridge.findModem(true)
 if not modem then
     error("No wireless modem found!")
 end
-modem.open(CHANNEL_RECEIVE)
+-- Open command channel (respects dual-mode migration)
+WebBridge.openChannels(modem, { 'remoteturtle.command' })
 
 print("Server-Driven Turtle v5 (Pure Eval Protocol)")
 print("ID: " .. os.getComputerID())