Add remote reboot functionality via system channel

inventoryManager.lua

@@ -28,6 +28,9 @@ local BROADCAST_INTERVAL = 1   -- seconds between state broadcasts
 local CRAFT_CHANNEL       = 4203
 local CRAFT_REPLY_CHANNEL = 4204
 
+-- Remote reboot system channel (all devices listen on this)
+local SYSTEM_CHANNEL      = 4205
+
 -------------------------------------------------
 -- Idempotent command tracking
 -------------------------------------------------
@@ -2571,6 +2574,7 @@ local function main()
             networkModemName = name
             networkModem.open(ORDER_CHANNEL)
             networkModem.open(CRAFT_REPLY_CHANNEL)
+            networkModem.open(SYSTEM_CHANNEL)
             break
         end
     end
@@ -2967,6 +2971,20 @@ local function main()
                         cache.droppers = merged
                         bumpStateVersion()
                         pcall(broadcastState)
+                    elseif message.type == "reboot" then
+                        local target = message.target or "all"
+                        log.info("NET", "Reboot command received, target: %s", target)
+                        -- Broadcast reboot to all clients on system channel
+                        networkModem.transmit(SYSTEM_CHANNEL, ORDER_CHANNEL, {
+                            type   = "reboot",
+                            target = target,
+                        })
+                        -- If manager itself is targeted, reboot after a short delay
+                        if target == "all" or target == "manager" then
+                            log.info("NET", "Manager rebooting in 1s...")
+                            sleep(1)
+                            os.reboot()
+                        end
                     elseif message.type == "craft" and message.recipeIdx then
                         log.info("NET", "Craft request: recipe #%d", message.recipeIdx)
                         local pok, ok, err = pcall(craftItem, message.recipeIdx)