feat: inject _update_ts into all JSON responses for global OTA updates

ticketmachine.lua

@@ -84,10 +84,14 @@ local function fetchHTTP(url)
   end
 end
 
+local checkGlobalUpdate = nil
+
 local function fetchJSON(url)
   local txt = fetchHTTP(url)
   if not txt then return nil end
-  return jsonDecode(txt)
+  local parsed = jsonDecode(txt)
+  if checkGlobalUpdate then checkGlobalUpdate(parsed) end
+  return parsed
 end
 
 local function ensureDir(path)
@@ -154,6 +158,7 @@ local function postJSON(url, dataTable)
     return false, code, nil, tostring(err or 'request error')
   end
   local parsed = jsonDecode(body)
+  if checkGlobalUpdate then checkGlobalUpdate(parsed) end
   if code < 200 or code >= 300 then
     local msg = nil
     if type(parsed) == 'table' then
@@ -689,6 +694,48 @@ local function drawVersionIndicator()
   termDev.setTextColor(colors.white)
 end
 
+checkGlobalUpdate = function(parsed)
+  if type(parsed) == 'table' and parsed._update_ts then
+    local remoteTs = tonumber(parsed._update_ts)
+    if remoteTs and remoteTs > 0 then
+      local attemptFile = ".last_update_ts"
+      local tried = 0
+      if fs.exists(attemptFile) then
+        local f = fs.open(attemptFile, "r")
+        tried = tonumber(f and f.readAll() or "0") or 0
+        if f then f.close() end
+      end
+      if remoteTs > tried then
+        isUpdating = true
+        pcall(drawVersionIndicator)
+        sleep(0.5)
+        
+        local f = fs.open(attemptFile, "w")
+        if f then f.write(tostring(remoteTs)); f.close() end
+        
+        local env = setmetatable({ AUTO_UPDATE_SILENT = true }, { __index = _G or getfenv() or _ENV })
+        local fn, err = loadfile("update_machine.lua", env)
+        if fn then
+          local ok, res = pcall(fn, "--silent")
+          if not ok then
+            lastUpdateError = string.sub(tostring(res), 1, 30)
+          end
+        else
+          lastUpdateError = "loadfile failed: " .. tostring(err)
+        end
+        
+        isUpdating = false
+        pcall(drawVersionIndicator)
+        
+        if lastUpdateError then
+          sleep(3)
+        end
+        os.reboot()
+      end
+    end
+  end
+end
+
 local function checkAndApplyUpdate()
   if type(CFG) ~= 'table' then return end
   local remoteTs = tonumber(CFG.update_timestamp)