diff --git a/FSE-ticket.png b/FSE-ticket.png
deleted file mode 100644
index 0d51a09..0000000
Binary files a/FSE-ticket.png and /dev/null differ
diff --git a/gate.lua b/gate.lua
deleted file mode 100644
index 20d2b45..0000000
--- a/gate.lua
+++ /dev/null
@@ -1,1288 +0,0 @@
-local DEFAULT_SERVER_BASE = "http://ticket.fse-media.group"
-local DEFAULT_SERVER_PATH = "/api/tickets/check"
-local GATE_OPEN_SECONDS = 2
-local VERSION = "v1.5.7"
-
-local CONFIG_PATH = "gate_config.json"
-
-local function readFile(path)
-  if not fs.exists(path) then return nil end
-  local f = fs.open(path, "r")
-  if not f then return nil end
-  local c = f.readAll()
-  f.close()
-  return c
-end
-
-local function writeFile(path, content)
-  local f = fs.open(path, "w")
-  if not f then return false end
-  f.write(content)
-  f.close()
-  return true
-end
-
-local function trim(s)
-  return (tostring(s or ""):gsub("^%s+", ""):gsub("%s+$", ""))
-end
-
-local function splitCsv(s)
-  local out = {}
-  s = trim(s)
-  if #s == 0 then return out end
-  for part in s:gmatch("[^,/%s]+") do
-    local v = trim(part)
-    if #v > 0 then table.insert(out, v) end
-  end
-  return out
-end
-
-local pack = table.pack or function(...)
-  return { n = select("#", ...), ... }
-end
-
-local function loadConfig()
-  local def = { mode = "entry", station_codes = {} }
-  local raw = readFile(CONFIG_PATH)
-  if not raw or #raw == 0 then return def end
-  local ok, data = pcall(textutils.unserializeJSON, raw)
-  if not ok or type(data) ~= "table" then return def end
-  if type(data.mode) == "string" then def.mode = data.mode end
-  if type(data.station_codes) == "table" then def.station_codes = data.station_codes end
-  if type(data.side_modes) == "table" then def.side_modes = data.side_modes end
-  if type(data.server_url) == "string" then def.server_url = data.server_url end
-  if type(data.card_server_url) == "string" then def.card_server_url = data.card_server_url end
-  if type(data.station_code) == "string" then def.station_code = data.station_code end
-  if type(data.side_station_codes) == "table" then def.side_station_codes = data.side_station_codes end
-  return def
-end
-
-local function stationSetFromList(list)
-  local set = {}
-  if type(list) ~= "table" then return set end
-  for _, v in ipairs(list) do
-    local c = trim(v)
-    if #c > 0 then
-      local parts = splitCsv(c)
-      if #parts == 0 then
-        set[c] = true
-      else
-        for _, p in ipairs(parts) do set[p] = true end
-      end
-    end
-  end
-  return set
-end
-
-local monitor = peripheral.find("monitor")
-local speaker = peripheral.find("speaker")
-local inspection = peripheral.find("ticket_inspection_machine")
-
-local serverConnected = nil
-local serverLastChangeTs = 0
-
-local function setServerConnected(ok)
-  if serverConnected == ok then return end
-  serverConnected = ok
-  serverLastChangeTs = os.epoch("utc")
-end
-
-local termDev = term
-if monitor then
-  pcall(monitor.setTextScale, 0.5)
-  termDev = monitor
-end
-
-local function clear()
-  termDev.setBackgroundColor(colors.black)
-  termDev.setTextColor(colors.white)
-  termDev.clear()
-  termDev.setCursorPos(1, 1)
-end
-
-local function centerText(y, text, color)
-  local w = termDev.getSize()
-  termDev.setTextColor(color or colors.white)
-  local x = math.max(1, math.floor((w - #text) / 2) + 1)
-  termDev.setCursorPos(x, y)
-  termDev.write(text)
-end
-
-local function drawServerStatusIndicator(w)
-  if w < 2 then return end
-  local col = colors.yellow
-  if serverConnected == true then col = colors.lime
-  elseif serverConnected == false then col = colors.red end
-  termDev.setBackgroundColor(colors.black)
-  termDev.setTextColor(col)
-  termDev.setCursorPos(w - 1, 1)
-  termDev.write("S")
-  termDev.setCursorPos(w, 1)
-  termDev.write("*")
-  termDev.setTextColor(colors.white)
-end
-
-local function drawVersionIndicator(w)
-  local s = tostring(VERSION or "")
-  if #s == 0 then return end
-  if w < #s then return end
-  termDev.setBackgroundColor(colors.black)
-  termDev.setTextColor(colors.gray)
-  termDev.setCursorPos(1, 1)
-  termDev.write(s)
-  termDev.setTextColor(colors.white)
-end
-
-local function draw(statusLine1, statusLine2, statusColor)
-  clear()
-  local w, h = termDev.getSize()
-  centerText(1, "GATE", colors.cyan)
-  drawVersionIndicator(w)
-  drawServerStatusIndicator(w)
-  if statusLine1 and #statusLine1 > 0 then
-    centerText(math.max(2, math.floor(h / 2)), statusLine1, statusColor or colors.white)
-  end
-  if statusLine2 and #statusLine2 > 0 then
-    centerText(math.min(h, math.max(3, math.floor(h / 2) + 1)), statusLine2, statusColor or colors.white)
-  end
-  termDev.setCursorPos(1, h)
-  termDev.setTextColor(colors.gray)
-  termDev.write(string.rep(" ", w))
-end
-
-local function pulseLeftRedstone(seconds)
-  seconds = tonumber(seconds) or 1
-  if not redstone or type(redstone.setOutput) ~= "function" then return end
-  pcall(redstone.setOutput, "left", true)
-  os.sleep(seconds)
-  pcall(redstone.setOutput, "left", false)
-end
-
-pcall(function()
-  if redstone and type(redstone.setOutput) == "function" then
-    redstone.setOutput("left", false)
-  end
-end)
-
-local function readApiEndpointFile(path)
-  local s = trim(readFile(path) or "")
-  if #s == 0 then return nil end
-  return s
-end
-
-local function resolveServerURL(cfg)
-  if type(cfg.server_url) == "string" and #trim(cfg.server_url) > 0 then
-    local u = trim(cfg.server_url)
-    u = u:gsub("/api/tickets/status%s*$", "/api/tickets/check")
-    return u
-  end
-
-  local base = readApiEndpointFile("API_ENDPOINT_GATE.txt") or readApiEndpointFile("API_ENDPOINT.txt")
-  if base and base:match("/api$") then
-    base = base:sub(1, -5)
-  end
-  if base and #base > 0 then
-    return base .. DEFAULT_SERVER_PATH
-  end
-  return DEFAULT_SERVER_BASE .. DEFAULT_SERVER_PATH
-end
-
-local function guessBaseFromStatusURL(url)
-  url = trim(url or "")
-  if #url == 0 then return DEFAULT_SERVER_BASE end
-  local b = url:gsub("/api/tickets/check.*$", "")
-  b = b:gsub("/api/.*$", "")
-  b = trim(b)
-  if #b == 0 then return DEFAULT_SERVER_BASE end
-  return b
-end
-
-local function httpRequest(method, url, body, headers)
-  if not http then
-    setServerConnected(false)
-    return false, "HTTP API disabled"
-  end
-  headers = headers or {}
-  local okReq, err = pcall(function()
-    http.request({
-      url = url,
-      method = method,
-      headers = headers,
-      body = body,
-    })
-  end)
-  if not okReq then
-    setServerConnected(false)
-    return false, tostring(err)
-  end
-
-  while true do
-    local ev, p1, p2, p3 = os.pullEvent()
-    if ev == "http_success" and p1 == url then
-      local res = p2
-      if type(res) == "table" and type(res.readAll) == "function" then
-        local data = res.readAll()
-        res.close()
-        setServerConnected(true)
-        return true, data
-      end
-      setServerConnected(false)
-      return false, "invalid http response"
-    end
-    if ev == "http_failure" and p1 == url then
-      local err = p2
-      local res = p3
-      if type(p2) == "table" and type(p2.readAll) == "function" then
-        res = p2
-        err = p3
-      end
-      if type(res) == "table" and type(res.readAll) == "function" then
-        local data = res.readAll()
-        res.close()
-        setServerConnected(false)
-        return false, data
-      end
-      setServerConnected(false)
-      return false, tostring(err or "http_failure")
-    end
-    os.queueEvent(ev, p1, p2, p3)
-    os.sleep(0)
-  end
-end
-
-local function postCheck(url, payload)
-  local okBody, body = pcall(textutils.serializeJSON, payload)
-  if not okBody then return false end
-  local ok, data = httpRequest("POST", url, body, { ["Content-Type"] = "application/json" })
-  if not ok then return false, data end
-  local okJ, parsed = pcall(textutils.unserializeJSON, data or "")
-  if not okJ then return false, data end
-  return true, parsed
-end
-
-local function getJSON(url)
-  local ok, data = httpRequest("GET", url)
-  if not ok then return false, data end
-  local okJ, parsed = pcall(textutils.unserializeJSON, data or "")
-  if not okJ then return false, data end
-  return true, parsed
-end
-
-local function resolveCardServerURL(cfg, ticketCheckURL)
-  if type(cfg.card_server_url) == "string" and #trim(cfg.card_server_url) > 0 then
-    return trim(cfg.card_server_url)
-  end
-  local base = guessBaseFromStatusURL(ticketCheckURL)
-  return base:gsub("/+$", "") .. "/api/cards/check"
-end
-
-local function resolveCardSyncBaseURL(cfg, ticketCheckURL, cardCheckURL)
-  if type(cfg.card_sync_url) == "string" and #trim(cfg.card_sync_url) > 0 then
-    local raw = trim(cfg.card_sync_url)
-    return raw:gsub("/+$", "")
-  end
-  local base = guessBaseFromStatusURL(cardCheckURL or ticketCheckURL)
-  return base:gsub("/+$", "") .. "/api/ic-cards"
-end
-
-local function resolveFareQueryURL(ticketCheckURL)
-  local base = guessBaseFromStatusURL(ticketCheckURL)
-  return base:gsub("/+$", "") .. "/api/public/fares/query"
-end
-
-local function urlEncodeComponent(value)
-  local s = tostring(value or "")
-  return (s:gsub("([^%w%-_%.~])", function(c)
-    return string.format("%%%02X", string.byte(c))
-  end))
-end
-
-local function toMoney(v)
-  local n = tonumber(v)
-  if n == nil then return nil end
-  return math.floor(n * 100 + 0.5) / 100
-end
-
-local stationNameToCode = {}
-
-local function normKey(s)
-  return trim(s):lower()
-end
-
-local function refreshStationNameMap(serverBase)
-  serverBase = trim(serverBase or "")
-  if #serverBase == 0 then return false end
-  local url = serverBase:gsub("/+$", "") .. "/api/stations"
-  local ok, data = httpRequest("GET", url)
-  if not ok then return false end
-  local okJ, parsed = pcall(textutils.unserializeJSON, data or "")
-  if not okJ then return false end
-  if type(parsed) == "table" and type(parsed.stations) == "table" then
-    parsed = parsed.stations
-  end
-  if type(parsed) ~= "table" then return false end
-
-  stationNameToCode = {}
-  for _, st in ipairs(parsed) do
-    if type(st) == "table" then
-      local code = trim(st.code)
-      if #code > 0 then
-        local en = trim(st.en_name or st.en)
-        if #en > 0 then stationNameToCode[normKey(en)] = code end
-        local cn = trim(st.name)
-        if #cn > 0 then stationNameToCode[normKey(cn)] = code end
-      end
-    end
-  end
-  return true
-end
-
-local function inferStationCodeFromName(name)
-  local key = normKey(name or "")
-  if #key == 0 then return "" end
-  return stationNameToCode[key] or ""
-end
-
-local function playDfpwm(path)
-  if not speaker then return end
-  if not fs.exists(path) then return end
-  local okD, dfpwm = pcall(require, "cc.audio.dfpwm")
-  if not okD or not dfpwm then return end
-  local h = fs.open(path, "rb")
-  if not h then return end
-  local decoder = dfpwm.make_decoder()
-  while true do
-    local chunk = h.read(16 * 1024)
-    if not chunk then break end
-    local buf = decoder(chunk)
-    while not speaker.playAudio(buf) do
-      os.pullEvent("speaker_audio_empty")
-    end
-  end
-  h.close()
-end
-
-local function normalizeTicketId(v)
-  v = tostring(v or "")
-  v = v:gsub("^%s+", ""):gsub("%s+$", "")
-  v = v:gsub("%s+", "")
-  if #v == 0 then return nil end
-  local prefix, num = v:match("^([A-Za-z][A-Za-z])%-?([0-9]+)$")
-  if prefix and num then
-    prefix = prefix:upper()
-    if #num < 8 then
-      num = string.rep("0", 8 - #num) .. num
-    elseif #num > 8 then
-      num = num:sub(-8)
-    end
-    return prefix .. "-" .. num
-  end
-  return v:lower()
-end
-
-local function normalizeIcCardId(v)
-  local s = tostring(v or "")
-  s = s:gsub("%s+", ""):upper()
-  if #s == 0 then return "" end
-  local num = s:match("^IC%-?([0-9]+)$")
-  if num then
-    if #num < 6 then
-      num = string.rep("0", 6 - #num) .. num
-    elseif #num > 6 then
-      num = num:sub(-6)
-    end
-    return "IC-" .. num
-  end
-  return s
-end
-
-local function collectScanTables(scan, includeTicket)
-  local out = {}
-  local seen = {}
-  local function add(v)
-    if type(v) ~= "table" or seen[v] then return end
-    seen[v] = true
-    table.insert(out, v)
-  end
-  if type(scan) ~= "table" then return out end
-  add(scan)
-  add(scan.data)
-  add(scan.payload)
-  add(scan.card)
-  add(scan.ic_card)
-  add(scan.wallet)
-  add(scan.card_data)
-  add(scan.media_data)
-  if includeTicket then
-    add(scan.ticket)
-    add(scan.ticket_data)
-  end
-  return out
-end
-
-local function firstNonEmptyFromTables(tables, keys)
-  if type(tables) ~= "table" or type(keys) ~= "table" then return "" end
-  for _, t in ipairs(tables) do
-    for _, key in ipairs(keys) do
-      local v = t[key]
-      if v ~= nil then
-        local s = trim(v)
-        if #s > 0 then return s end
-      end
-    end
-  end
-  return ""
-end
-
-local function firstNumberFromTables(tables, keys)
-  if type(tables) ~= "table" or type(keys) ~= "table" then return nil end
-  for _, t in ipairs(tables) do
-    for _, key in ipairs(keys) do
-      local n = tonumber(t[key])
-      if n ~= nil then return n end
-    end
-  end
-  return nil
-end
-
-local function isTruthy(v)
-  if v == true then return true end
-  if type(v) == "number" then return v ~= 0 end
-  if type(v) == "string" then
-    local s = v:lower()
-    return s == "true" or s == "1" or s == "yes"
-  end
-  return false
-end
-
-local function firstTruthyFromTables(tables, keys)
-  if type(tables) ~= "table" or type(keys) ~= "table" then return false end
-  for _, t in ipairs(tables) do
-    for _, key in ipairs(keys) do
-      if t[key] ~= nil and isTruthy(t[key]) then
-        return true
-      end
-    end
-  end
-  return false
-end
-
-local function getTicketId(scan)
-  local tables = collectScanTables(scan, true)
-  if #tables == 0 then return nil end
-  local raw = firstNonEmptyFromTables(tables, {
-    "ticketId", "ticket_id", "id", "ticketNo", "ticket_no", "code"
-  })
-  if #raw == 0 then return nil end
-  return normalizeTicketId(raw)
-end
-
-
-
-local function getCardId(scan)
-  local tables = collectScanTables(scan, false)
-  if #tables == 0 then return "" end
-  local raw = firstNonEmptyFromTables(tables, {
-    "card_id",
-    "cardId",
-    "ic_card_id",
-    "icCardId",
-    "wallet_id",
-    "walletId",
-    "card_uid",
-    "cardUid",
-    "uid",
-    "uuid",
-    "serial",
-    "serial_number",
-    "serialNumber",
-    "nfc_uid",
-    "nfcUid",
-    "rfid_uid",
-    "rfidUid"
-  })
-  if #raw == 0 then return "" end
-  return normalizeIcCardId(raw)
-end
-
-local function getCardBalance(scan)
-  local tables = collectScanTables(scan, false)
-  return firstNumberFromTables(tables, {
-    "balance",
-    "stored_value",
-    "storedValue",
-    "wallet_balance",
-    "walletBalance",
-    "remaining_balance",
-    "remainingBalance",
-    "value",
-    "amount"
-  })
-end
-
-local function isICCardScan(scan)
-  local tables = collectScanTables(scan, false)
-  if #tables == 0 then return false end
-  if #getCardId(scan) > 0 then return true end
-  if getCardBalance(scan) ~= nil then return true end
-  if type(scan.card) == "table" or type(scan.ic_card) == "table" or type(scan.wallet) == "table" then
-    return true
-  end
-  local media = firstNonEmptyFromTables(tables, {
-    "media",
-    "media_type",
-    "mediaType",
-    "product_type",
-    "productType",
-    "ticket_type",
-    "ticketType",
-    "kind",
-    "type",
-    "category"
-  }):lower()
-  if media:find("card", 1, true) or media:find("wallet", 1, true) then return true end
-  if media:find("ic", 1, true) or media:find("nfc", 1, true) or media:find("rfid", 1, true) then return true end
-  return false
-end
-
-local function getStartStation(scan)
-  local tables = collectScanTables(scan, true)
-  local id = firstNonEmptyFromTables(tables, {
-    "entry",
-    "start_station",
-    "startStation",
-    "start",
-    "start_station_id",
-    "start_station_code",
-    "from_station",
-    "from",
-    "startStationId",
-    "start_stationId",
-    "entry_station",
-    "entryStation"
-  })
-  if #id > 0 then return id end
-  return inferStationCodeFromName(firstNonEmptyFromTables(tables, {
-    "start_name_en", "startNameEn", "start_name", "fromNameCnU", "fromNameCn", "entry_name", "entryName"
-  }))
-end
-
-local function getTerminalStation(scan)
-  local tables = collectScanTables(scan, true)
-  local id = firstNonEmptyFromTables(tables, {
-    "exit",
-    "terminal_station",
-    "terminalStation",
-    "terminal",
-    "end_station",
-    "endStation",
-    "terminal_station_id",
-    "terminal_station_code",
-    "to_station",
-    "to",
-    "endStationId",
-    "end_stationId",
-    "exit_station",
-    "exitStation"
-  })
-  if #id > 0 then return id end
-  return inferStationCodeFromName(firstNonEmptyFromTables(tables, {
-    "terminal_name_en", "terminalNameEn", "terminal_name", "toNameCnU", "toNameCn", "exit_name", "exitName"
-  }))
-end
-
-
-local function saveLastScan(scan)
-  if type(scan) ~= "table" then return end
-  local t = {}
-  for k, v in pairs(scan) do t[k] = v end
-  local startStation = getStartStation(t)
-  if #startStation > 0 and (t.start_station == nil or trim(t.start_station) == "") then
-    t.start_station = startStation
-  end
-  local terminalStation = getTerminalStation(t)
-  if #terminalStation > 0 and (t.terminal_station == nil or trim(t.terminal_station) == "") then
-    t.terminal_station = terminalStation
-  end
-
-  local ok, s = pcall(textutils.serializeJSON, t)
-  if not ok or type(s) ~= "string" then
-    ok, s = pcall(textutils.serialize, t)
-  end
-  if ok and type(s) == "string" then
-    writeFile("last_scan.json", s)
-  end
-end
-
-local cfg = loadConfig()
-local stationSet = stationSetFromList(cfg.station_codes)
-local serverURL = resolveServerURL(cfg)
-local cardServerURL = resolveCardServerURL(cfg, serverURL)
-local cardSyncBaseURL = resolveCardSyncBaseURL(cfg, serverURL, cardServerURL)
-local fareQueryURL = resolveFareQueryURL(serverURL)
-local mode = (trim(cfg.mode):lower() == "exit") and "exit" or "entry"
-
-local modeBySide = nil
-if type(cfg.side_modes) == "table" then
-  local tmp = {}
-  for side, m in pairs(cfg.side_modes) do
-    if type(side) == "string" then
-      local s = trim(side):lower()
-      if #s > 0 then
-        tmp[s] = (trim(m):lower() == "exit") and "exit" or "entry"
-      end
-    end
-  end
-  if next(tmp) ~= nil then modeBySide = tmp end
-end
-
-local sideStationCodeBySide = nil
-if type(cfg.side_station_codes) == "table" then
-  local tmp = {}
-  for side, code in pairs(cfg.side_station_codes) do
-    if type(side) == "string" then
-      local s = trim(side):lower()
-      local c = trim(code)
-      if #s > 0 and #c > 0 then
-        tmp[s] = c
-      end
-    end
-  end
-  if next(tmp) ~= nil then sideStationCodeBySide = tmp end
-end
-
-pcall(function()
-  refreshStationNameMap(guessBaseFromStatusURL(serverURL))
-end)
-
-if not inspection then
-  if modeBySide == nil then
-    draw("Missing peripheral:", "ticket_inspection_machine", colors.red)
-    error("ticket_inspection_machine not found")
-  end
-end
-
-if next(stationSet) == nil then
-  draw("No station codes set.", "Run installer first.", colors.red)
-  error("No station codes configured")
-end
-
-local stationListText = table.concat(cfg.station_codes, ",")
-local function readyLine1()
-  if not modeBySide then
-    return "Ready (" .. mode:upper() .. ")"
-  end
-  local f = modeBySide.front and modeBySide.front:upper() or "-"
-  local b = modeBySide.back and modeBySide.back:upper() or "-"
-  return "Ready (BI) F:" .. f .. " B:" .. b
-end
-
-draw(readyLine1(), "Station: " .. stationListText, colors.lime)
-
-local stationCodesPayload = {}
-for k, _ in pairs(stationSet) do table.insert(stationCodesPayload, k) end
-table.sort(stationCodesPayload)
-
-local function trimSide(s)
-  s = trim(s or ""):lower()
-  if #s == 0 then return nil end
-  return s
-end
-
-local function defaultStationCode()
-  local direct = trim(cfg.station_code or "")
-  if #direct > 0 then return direct end
-  return trim(stationCodesPayload[1] or "")
-end
-
-local function stationCodeForSide(side)
-  side = trimSide(side)
-  if side and type(sideStationCodeBySide) == "table" then
-    local v = trim(sideStationCodeBySide[side] or "")
-    if #v > 0 then return v end
-  end
-  return defaultStationCode()
-end
-
-local function isInspectionPeripheral(p)
-  return type(p) == "table" and (
-    type(p.getLastScanned) == "function"
-    or type(p.updateICCard) == "function"
-    or type(p.updateTicket) == "function"
-    or type(p.destroyTicket) == "function"
-  )
-end
-
-local function resolveInspection(side)
-  side = trimSide(side)
-  if side and peripheral and type(peripheral.wrap) == "function" then
-    local okW, p = pcall(peripheral.wrap, side)
-    if okW and isInspectionPeripheral(p) then
-      return p
-    end
-    return nil
-  end
-  if isInspectionPeripheral(inspection) then return inspection end
-  return nil
-end
-
-local function validateBidirectional()
-  if not modeBySide then return true end
-  for side, _ in pairs(modeBySide) do
-    if not resolveInspection(side) then
-      draw("Missing peripheral:", "ticket_inspection_machine@" .. tostring(side), colors.red)
-      error("ticket_inspection_machine not found on side: " .. tostring(side))
-    end
-  end
-  return true
-end
-
-validateBidirectional()
-
-local function inferSideFromScan(scan)
-  if type(scan) ~= "table" then return nil end
-  return trimSide(
-    scan.side
-      or scan.source_side
-      or scan.reader_side
-      or scan.peripheral_side
-      or scan.peripheralSide
-      or scan.device_side
-      or scan.peripheral
-      or scan.source
-      or scan.reader
-      or scan.name
-  )
-end
-
-local function isSideName(s)
-  s = trimSide(s)
-  if not s then return false end
-  return s == "front" or s == "back" or s == "left" or s == "right" or s == "top" or s == "bottom"
-end
-
-local function parseTicketScannedArgsPacked(ev)
-  local side = nil
-  local scan = nil
-  if type(ev) ~= "table" then return nil, nil end
-  local n = tonumber(ev.n) or #ev
-  for i = 2, n do
-    local v = ev[i]
-    if not scan and type(v) == "table" then
-      scan = v
-    elseif not side and type(v) == "string" and isSideName(v) then
-      side = trimSide(v)
-    end
-  end
-  if scan and not side then side = inferSideFromScan(scan) end
-  return scan, side
-end
-
-local function actionForSide(side)
-  if not modeBySide then return mode end
-  side = trimSide(side)
-  if not side then return mode end
-  return modeBySide[side] or mode
-end
-
-local function collectInspectionDevices(side, modeBySideRef)
-  local sideKnown = trimSide(side) ~= nil
-  local inspectionDevs = {}
-  local function addDev(dev)
-    if not dev then return end
-    table.insert(inspectionDevs, dev)
-  end
-  if sideKnown then
-    addDev(resolveInspection(side))
-  elseif modeBySideRef then
-    for s, _ in pairs(modeBySideRef) do
-      addDev(resolveInspection(s))
-    end
-  else
-    addDev(resolveInspection(side))
-  end
-  return inspectionDevs, sideKnown
-end
-
-local function collectInspectionBindings(side, modeBySideRef, fallbackInspection)
-  local out = {}
-  local seen = {}
-  local function addBinding(sideName, dev)
-    if not dev or seen[dev] then return end
-    seen[dev] = true
-    table.insert(out, { side = trimSide(sideName), dev = dev })
-  end
-
-  side = trimSide(side)
-  if side then
-    addBinding(side, resolveInspection(side))
-  elseif modeBySideRef then
-    for s, _ in pairs(modeBySideRef) do
-      addBinding(s, resolveInspection(s))
-    end
-  else
-    addBinding(nil, fallbackInspection or resolveInspection(nil))
-  end
-  return out
-end
-
-local function updateDeviceField(dev, key, value)
-  if type(dev) ~= "table" or type(dev.updateTicket) ~= "function" then return end
-  pcall(dev.updateTicket, key, value)
-end
-
-local function updateICCardField(dev, key, value)
-  if type(dev) ~= "table" or type(dev.updateICCard) ~= "function" then return false end
-  local okCall, okRes, detail = pcall(dev.updateICCard, key, value)
-  if not okCall then return false, tostring(okRes) end
-  if okRes == false then return false, tostring(detail or "update_failed") end
-  return true
-end
-
-local function updateICCardFields(dev, patch)
-  local allOk = true
-  local firstErr = nil
-  if type(patch) ~= "table" then return false end
-  for key, value in pairs(patch) do
-    local okField, errField = updateICCardField(dev, key, value)
-    if not okField then
-      allOk = false
-      if not firstErr then
-        firstErr = tostring(key) .. ": " .. tostring(errField or "update_failed")
-      end
-    end
-  end
-  return allOk, firstErr
-end
-
-local function readLastScanned(dev)
-  if type(dev) ~= "table" or type(dev.getLastScanned) ~= "function" then return nil end
-  local ok, scan = pcall(dev.getLastScanned)
-  if not ok or type(scan) ~= "table" then return nil end
-  return scan
-end
-
-local function getCardEntry(scan)
-  return firstNonEmptyFromTables(collectScanTables(scan, false), {
-    "entry", "entry_station", "entryStation", "start_station", "startStation"
-  })
-end
-
-local function getCardEntered(scan)
-  if #getCardEntry(scan) > 0 then return true end
-  return firstTruthyFromTables(collectScanTables(scan, false), {
-    "entered", "is_entered", "in_station", "inside_station"
-  })
-end
-
-local function getCardExited(scan)
-  if #getCardEntry(scan) > 0 then return false end
-  return firstTruthyFromTables(collectScanTables(scan, false), {
-    "exited", "is_exited", "out_station", "outside_station"
-  })
-end
-
-local function getCardOwnerName(scan)
-  return firstNonEmptyFromTables(collectScanTables(scan, false), {
-    "ownerName", "owner_name", "holder_name", "card_holder", "passenger"
-  })
-end
-
-local function queryFare(fromStation, toStation)
-  fromStation = trim(fromStation)
-  toStation = trim(toStation)
-  if #fromStation == 0 or #toStation == 0 then
-    return nil, "missing_station"
-  end
-  local url = fareQueryURL
-    .. "?from=" .. urlEncodeComponent(fromStation)
-    .. "&to=" .. urlEncodeComponent(toStation)
-  local ok, resp = getJSON(url)
-  if not ok or type(resp) ~= "table" then
-    return nil, "net_error"
-  end
-  local fare = tonumber(
-    resp.discounted_regular_fare
-    or resp.discounted_regular
-    or resp.regular_fare
-    or resp["优惠后常规票价"]
-    or resp["常规票价"]
-    or resp.regular
-  )
-  if fare == nil then
-    return nil, tostring(resp.error or resp["错误"] or "fare_not_found")
-  end
-  return toMoney(fare), nil
-end
-
-local function denyCard(reason, detail)
-  draw("DENIED", tostring(detail or reason or "deny"), colors.red)
-  playDfpwm("error.dfpwm")
-end
-
-local function deductICCardBalance(dev, amount)
-  if type(dev) ~= "table" or type(dev.deductICCard) ~= "function" then
-    return false, "unsupported_method"
-  end
-  local okCall, okRes, detail = pcall(dev.deductICCard, amount)
-  if not okCall then return false, tostring(okRes) end
-  if okRes == true then return true, tonumber(detail) end
-  return false, tostring(detail or "deduct_failed")
-end
-
-local function syncICCardState(cardId, payload)
-  local id = trim(cardId)
-  if #id == 0 then return false, "missing_card_id" end
-  local url = cardSyncBaseURL .. "/" .. urlEncodeComponent(id) .. "/sync"
-  payload = payload or {}
-  payload.card_id = id
-  return postCheck(url, payload)
-end
-
-local function handleICCardScan(scan, side, scanDev)
-  saveLastScan(scan)
-  local inspectionDevs = scanDev and { scanDev } or select(1, collectInspectionDevices(side, modeBySide, inspection))
-  local sideKnown = trimSide(side) ~= nil
-  local action = actionForSide(side)
-  if modeBySide and not sideKnown then
-    if getCardEntered(scan) and not getCardExited(scan) then
-      action = "exit"
-    else
-      action = "entry"
-    end
-  end
-
-  local cardId = getCardId(scan)
-  if #cardId == 0 then
-    draw("Invalid card.", "Missing card_id.", colors.red)
-    playDfpwm("error.dfpwm")
-    return
-  end
-
-  local balance = toMoney(getCardBalance(scan) or 0) or 0
-  local entryStation = trim(getCardEntry(scan))
-  local exitStation = stationCodeForSide(side)
-  local fare = 0
-  local usedAction = action
-
-  if #exitStation == 0 then
-    denyCard("missing_station", "Missing gate station")
-    return
-  end
-
-  if usedAction == "entry" then
-    if getCardEntered(scan) and not getCardExited(scan) then
-      denyCard("already_entered", "Already entered")
-      return
-    end
-    local okWrite = true
-    local writeErr = nil
-    for _, dev in ipairs(inspectionDevs) do
-      local okPatch, errPatch = updateICCardFields(dev, {
-        entry = exitStation,
-      })
-      okWrite = okPatch and okWrite
-      if not okPatch and not writeErr then writeErr = errPatch end
-    end
-    if not okWrite then
-      draw("WRITE ERROR", tostring(writeErr or "Failed to update card"), colors.red)
-      playDfpwm("error.dfpwm")
-      return
-    end
-    entryStation = exitStation
-  else
-    if not getCardEntered(scan) then
-      denyCard("not_entered", "Not entered")
-      return
-    end
-    if getCardExited(scan) then
-      denyCard("already_exited", "Already exited")
-      return
-    end
-    if #entryStation == 0 then
-      denyCard("missing_entry_station", "Missing entry station")
-      return
-    end
-    local fareValue, fareErr = queryFare(entryStation, exitStation)
-    if fareValue == nil then
-      if fareErr == "net_error" then
-        draw("NET ERROR", "Fare lookup failed", colors.red)
-        playDfpwm("error.dfpwm")
-      else
-        denyCard("fare_not_found", fareErr)
-      end
-      return
-    end
-    fare = fareValue
-    if balance < fare then
-      denyCard("insufficient_balance", "Fare: " .. tostring(fare) .. " Bal: " .. tostring(balance))
-      return
-    end
-    local okWrite = true
-    local writeErr = nil
-    for _, dev in ipairs(inspectionDevs) do
-      local okDeduct, newBalanceOrErr = deductICCardBalance(dev, fare)
-      if okDeduct then
-        balance = toMoney(newBalanceOrErr or (balance - fare)) or 0
-        local okClear, clearErr = updateICCardField(dev, "entry", nil)
-        local okFare, fareErr = updateICCardField(dev, "last_fare", fare)
-        if not okClear or not okFare then
-          okWrite = false
-          if not okClear and not writeErr then writeErr = "entry: " .. tostring(clearErr or "update_failed") end
-          if not okFare and not writeErr then writeErr = "last_fare: " .. tostring(fareErr or "update_failed") end
-        end
-      else
-        okWrite = false
-        if tostring(newBalanceOrErr) == "insufficient" then
-          denyCard("insufficient_balance", "-" .. tostring(fare) .. " Left: " .. tostring(balance))
-        else
-          draw("WRITE ERROR", tostring(newBalanceOrErr or "deduct_failed"), colors.red)
-          playDfpwm("error.dfpwm")
-        end
-        break
-      end
-    end
-    if not okWrite then
-      if writeErr then
-        draw("WRITE ERROR", tostring(writeErr), colors.red)
-        playDfpwm("error.dfpwm")
-      end
-      return
-    end
-  end
-
-  for _, dev in ipairs(inspectionDevs) do
-    if usedAction == "entry" then
-      updateDeviceField(dev, "entered", true)
-      updateDeviceField(dev, "exited", false)
-      if #entryStation > 0 then updateDeviceField(dev, "entry_station", entryStation) end
-    else
-      updateDeviceField(dev, "exited", true)
-      updateDeviceField(dev, "entered", false)
-      if #exitStation > 0 then updateDeviceField(dev, "exit_station", exitStation) end
-      updateDeviceField(dev, "last_fare", fare)
-    end
-    if balance ~= nil then updateDeviceField(dev, "balance", balance) end
-  end
-
-  local syncTs = (os.epoch and os.epoch("utc")) or (os.time() * 1000)
-  local okSync, syncResp = syncICCardState(cardId, {
-    type = "check",
-    action = usedAction,
-    device = "gate",
-    ts = syncTs,
-    station_code = exitStation,
-    entry_station = entryStation,
-    exit_station = usedAction == "exit" and exitStation or "",
-    entered = (usedAction == "entry"),
-    exited = (usedAction == "exit"),
-    fare = fare,
-    last_fare = fare,
-    balance = balance,
-    result = "pass"
-  })
-  if okSync and type(syncResp) == "table" and type(syncResp.card) == "table" then
-    balance = toMoney(syncResp.card.balance or balance) or balance
-  end
-
-  local line2 = nil
-  if usedAction == "exit" then
-    line2 = "-" .. tostring(fare) .. "  Left: " .. tostring(balance or "?")
-  else
-    line2 = "Left: " .. tostring(balance or "?")
-  end
-  draw("PASS", line2, colors.lime)
-  parallel.waitForAll(
-    function() pulseLeftRedstone(GATE_OPEN_SECONDS) end,
-    function() playDfpwm("pass.dfpwm") end
-  )
-end
-
-local function handleScan(scan, side, scanDev)
-  saveLastScan(scan)
-  local inspectionDevs = scanDev and { scanDev } or select(1, collectInspectionDevices(side, modeBySide, inspection))
-  local sideKnown = trimSide(side) ~= nil
-  local action = actionForSide(side)
-  if modeBySide and not sideKnown then
-    if isTruthy(scan and scan.entered) and not isTruthy(scan and scan.exited) then
-      action = "exit"
-    else
-      action = "entry"
-    end
-  end
-
-  local ticketId = getTicketId(scan)
-  if not ticketId then
-    draw("Invalid ticket.", "Missing ticketId.", colors.red)
-    playDfpwm("error.dfpwm")
-    return
-  end
-
-  local hintTripsTotal = tonumber(scan.trips_total or scan.rides_total or scan.trips or scan.rides)
-  local hintTripsRemaining = tonumber(scan.trips_remaining or scan.rides_remaining)
-
-  local function doCheck(act)
-    return postCheck(serverURL, {
-      ticket_id = ticketId,
-      action = act,
-      station_codes = stationCodesPayload,
-      station_code = stationCodeForSide(side),
-      device = "gate",
-      ts = os.epoch("utc"),
-      trips_total = hintTripsTotal,
-      trips_remaining = hintTripsRemaining,
-    })
-  end
-
-  local ok, resp = doCheck(action)
-  local usedAction = action
-  if ok and type(resp) == "table" and resp.result ~= "pass" and tostring(resp.reason) == "wrong_station" and modeBySide and not sideKnown then
-    local alt = (action == "entry") and "exit" or "entry"
-    local ok2, resp2 = doCheck(alt)
-    if ok2 and type(resp2) == "table" then
-      if resp2.result == "pass" then
-        ok, resp = ok2, resp2
-        usedAction = alt
-      elseif tostring(resp2.reason) ~= "wrong_station" then
-        ok, resp = ok2, resp2
-        usedAction = alt
-      end
-    end
-  end
-
-  if not ok or type(resp) ~= "table" then
-    draw("NET ERROR", "Server check failed.", colors.red)
-    playDfpwm("error.dfpwm")
-    return
-  end
-
-  if resp.result ~= "pass" then
-    draw("DENIED", tostring(resp.reason or "deny"), colors.red)
-    playDfpwm("error.dfpwm")
-    return
-  end
-
-  pcall(function()
-    if #inspectionDevs == 0 then return end
-    local newRides = tonumber(resp.trips_remaining)
-      or tonumber(scan.trips_remaining or scan.rides_remaining)
-      or tonumber(scan.rides)
-    for _, dev in ipairs(inspectionDevs) do
-      if type(dev) == "table" and type(dev.updateTicket) == "function" then
-        if usedAction == "entry" then
-          dev.updateTicket("entered", true)
-          dev.updateTicket("exited", false)
-          if newRides ~= nil then dev.updateTicket("rides", newRides) end
-        else
-          dev.updateTicket("exited", true)
-          dev.updateTicket("entered", false)
-          if newRides ~= nil then dev.updateTicket("rides", newRides) end
-        end
-      end
-    end
-  end)
-
-  local remaining = tonumber(resp.trips_remaining)
-  if usedAction == "exit" and isTruthy(resp.destroy_ticket) and remaining ~= nil and remaining <= 0 then
-    for _, dev in ipairs(inspectionDevs) do
-      if type(dev) == "table" and type(dev.destroyTicket) == "function" then
-        pcall(dev.destroyTicket)
-      end
-    end
-  end
-
-  local msg = (usedAction == "exit")
-    and ("Rides left: " .. tostring(resp.trips_remaining or ""))
-    or "Welcome."
-
-  draw("PASS", msg, colors.lime)
-  parallel.waitForAll(
-    function() pulseLeftRedstone(GATE_OPEN_SECONDS) end,
-    function() playDfpwm("pass.dfpwm") end
-  )
-end
-
-local recentScans = {}
-
-local function buildScanKey(scan, side, eventName)
-  side = trimSide(side) or "-"
-  if eventName == "ic_card_scanned" or isICCardScan(scan) then
-    return table.concat({
-      side,
-      "ic",
-      getCardId(scan),
-      tostring(getCardBalance(scan) or ""),
-      getCardEntry(scan),
-      getCardOwnerName(scan),
-    }, "|")
-  end
-  return table.concat({
-    side,
-    "ticket",
-    tostring(getTicketId(scan) or ""),
-    tostring(scan.timestamp or scan.order_datetime or ""),
-    tostring(scan.rides or scan.trips or ""),
-    tostring(scan.entered or ""),
-    tostring(scan.exited or ""),
-  }, "|")
-end
-
-local function shouldProcessScan(scan, side, eventName)
-  local key = buildScanKey(scan, side, eventName)
-  local now = os.epoch("utc")
-  local prev = recentScans[key]
-  recentScans[key] = now
-  if prev and (now - prev) < 500 then
-    return false
-  end
-  return true
-end
-
-local function matchesEventType(scan, eventName)
-  if eventName == "ic_card_scanned" then return isICCardScan(scan) end
-  if eventName == "ticket_scanned" then return not isICCardScan(scan) end
-  return true
-end
-
-local function processInspectionEvent(eventName, ev)
-  local payloadScan, payloadSide = parseTicketScannedArgsPacked(ev)
-  local bindings = collectInspectionBindings(payloadSide, modeBySide, inspection)
-  local handled = false
-
-  for _, binding in ipairs(bindings) do
-    local scan = readLastScanned(binding.dev)
-    if type(scan) == "table" and matchesEventType(scan, eventName) and shouldProcessScan(scan, binding.side, eventName) then
-      if eventName == "ic_card_scanned" or isICCardScan(scan) then
-        handleICCardScan(scan, binding.side, binding.dev)
-      else
-        handleScan(scan, binding.side, binding.dev)
-      end
-      handled = true
-    end
-  end
-
-  if not handled and type(payloadScan) == "table" and shouldProcessScan(payloadScan, payloadSide, eventName) then
-    local payloadDev = nil
-    if payloadSide then
-      payloadDev = resolveInspection(payloadSide)
-    elseif #bindings == 1 then
-      payloadDev = bindings[1].dev
-    elseif not modeBySide then
-      payloadDev = inspection
-    end
-    if eventName == "ic_card_scanned" or isICCardScan(payloadScan) then
-      handleICCardScan(payloadScan, payloadSide, payloadDev)
-    else
-      handleScan(payloadScan, payloadSide, payloadDev)
-    end
-  end
-end
-
-while true do
-  local ev = pack(os.pullEvent())
-  if ev[1] == "ticket_scanned" or ev[1] == "ic_card_scanned" then
-    processInspectionEvent(ev[1], ev)
-    os.sleep(0.35)
-    draw(readyLine1(), "Station: " .. stationListText, colors.lime)
-  end
-end
diff --git a/install_refillmachine.lua b/install_refillmachine.lua
deleted file mode 100644
index f7d909f..0000000
--- a/install_refillmachine.lua
+++ /dev/null
@@ -1,81 +0,0 @@
-local URL_MACHINE_HTTPS = "https://cloud.fse-media.group/d/API/TicketMachine/refillmachine.lua?sign=msZNBgD27qgGTwdeHlUxB25Q58386ZjDqorYurXiKqI=:0"
-local URL_MACHINE_HTTP = "http://cloud.fse-media.group/d/API/TicketMachine/refillmachine.lua?sign=msZNBgD27qgGTwdeHlUxB25Q58386ZjDqorYurXiKqI=:0"
-
-local function writeFile(path, content, binary)
-  local mode = binary and "wb" or "w"
-  local f = fs.open(path, mode)
-  if not f then return false end
-  f.write(content)
-  f.close()
-  return true
-end
-
-local function atomicWrite(path, content, binary)
-  local tmp = path .. ".new"
-  if fs.exists(tmp) then fs.delete(tmp) end
-  if not writeFile(tmp, content, binary) then return false end
-  if fs.exists(path) then fs.delete(path) end
-  fs.move(tmp, path)
-  return true
-end
-
-local function httpGet(url)
-  if not http then return false, "HTTP API disabled" end
-  local okReq, err = pcall(function()
-    http.request({ url = url, method = "GET" })
-  end)
-  if not okReq then return false, tostring(err) end
-
-  while true do
-    local ev, p1, p2, p3 = os.pullEvent()
-    if ev == "http_success" and p1 == url then
-      local res = p2
-      if type(res) == "table" and type(res.readAll) == "function" then
-        local data = res.readAll()
-        res.close()
-        return true, data
-      end
-      return false, "invalid http response"
-    end
-    if ev == "http_failure" and p1 == url then
-      local errMsg = p2
-      local res = p3
-      if type(p2) == "table" and type(p2.readAll) == "function" then
-        res = p2
-        errMsg = p3
-      end
-      if type(res) == "table" and type(res.readAll) == "function" then
-        local data = res.readAll()
-        res.close()
-        return false, data
-      end
-      return false, tostring(errMsg or "http_failure")
-    end
-  end
-end
-
-term.clear()
-term.setCursorPos(1, 1)
-print("Refill Machine Installer")
-print("")
-print("Downloading refill machine program...")
-
-local ok, code = httpGet(URL_MACHINE_HTTPS)
-if not ok then
-  ok, code = httpGet(URL_MACHINE_HTTP)
-end
-if not ok or type(code) ~= "string" or #code == 0 then
-  print("Download failed: " .. tostring(code or ""))
-  return
-end
-
-if not atomicWrite("startup", code, false) then
-  print("Write failed: startup")
-  return
-end
-atomicWrite("startup.lua", code, false)
-atomicWrite("refillmachine.lua", code, false)
-
-print("")
-print("Done.")
-print("Reboot the computer to start the refill machine.")
diff --git a/install_ticketmachine.lua b/install_ticketmachine.lua
deleted file mode 100644
index 361f019..0000000
--- a/install_ticketmachine.lua
+++ /dev/null
@@ -1,81 +0,0 @@
-local URL_MACHINE_HTTPS = "https://cloud.fse-media.group/d/API/TicketMachine/ticketmachine.lua?sign=UIiheDcpyzwKdovDZM3G-8IRZqApFgU2Kpnhe9k5ETQ=:0"
-local URL_MACHINE_HTTP = "http://cloud.fse-media.group/d/API/TicketMachine/ticketmachine.lua?sign=UIiheDcpyzwKdovDZM3G-8IRZqApFgU2Kpnhe9k5ETQ=:0"
-
-local function writeFile(path, content, binary)
-  local mode = binary and "wb" or "w"
-  local f = fs.open(path, mode)
-  if not f then return false end
-  f.write(content)
-  f.close()
-  return true
-end
-
-local function atomicWrite(path, content, binary)
-  local tmp = path .. ".new"
-  if fs.exists(tmp) then fs.delete(tmp) end
-  if not writeFile(tmp, content, binary) then return false end
-  if fs.exists(path) then fs.delete(path) end
-  fs.move(tmp, path)
-  return true
-end
-
-local function httpGet(url)
-  if not http then return false, "HTTP API disabled" end
-  local okReq, err = pcall(function()
-    http.request({ url = url, method = "GET" })
-  end)
-  if not okReq then return false, tostring(err) end
-
-  while true do
-    local ev, p1, p2, p3 = os.pullEvent()
-    if ev == "http_success" and p1 == url then
-      local res = p2
-      if type(res) == "table" and type(res.readAll) == "function" then
-        local data = res.readAll()
-        res.close()
-        return true, data
-      end
-      return false, "invalid http response"
-    end
-    if ev == "http_failure" and p1 == url then
-      local err = p2
-      local res = p3
-      if type(p2) == "table" and type(p2.readAll) == "function" then
-        res = p2
-        err = p3
-      end
-      if type(res) == "table" and type(res.readAll) == "function" then
-        local data = res.readAll()
-        res.close()
-        return false, data
-      end
-      return false, tostring(err or "http_failure")
-    end
-  end
-end
-
-term.clear()
-term.setCursorPos(1, 1)
-print("Ticket Machine Installer")
-print("")
-print("Downloading ticket machine program...")
-
-local ok, code = httpGet(URL_MACHINE_HTTPS)
-if not ok then
-  ok, code = httpGet(URL_MACHINE_HTTP)
-end
-if not ok or type(code) ~= "string" or #code == 0 then
-  print("Download failed: " .. tostring(code or ""))
-  return
-end
-
-if not atomicWrite("startup", code, false) then
-  print("Write failed: startup")
-  return
-end
-atomicWrite("startup.lua", code, false)
-if fs.exists("ticketmachine.lua") then atomicWrite("ticketmachine.lua", code, false) end
-
-print("")
-print("Done.")
-print("Reboot the computer to start the ticket machine.")
diff --git a/installer_bi.lua b/installer_bi.lua
deleted file mode 100644
index 5c44dfc..0000000
--- a/installer_bi.lua
+++ /dev/null
@@ -1,164 +0,0 @@
-local URL_ERROR = "http://cloud.fse-media.group/d/API/TicketMachine/error.dfpwm?sign=DvQ39wQDN6Cej4KPhAkM3JyXPM466koan6w9CckPxWU=:0"
-local URL_PASS = "http://cloud.fse-media.group/d/API/TicketMachine/pass.dfpwm?sign=ZJfGDYnaxQU4JrGSh4NDzKZtjq3eMjYh9KHmMSAMKZA=:0"
-local URL_GATE = "http://cloud.fse-media.group/d/API/TicketMachine/gate.lua?sign=OWy1wKkKhUhpnxXKeX6fRLePSg1XcaQgWOLvQbMuHRQ=:0"
-
-local CONFIG_PATH = "gate_config.json"
-
-local function trim(s)
-  return (tostring(s or ""):gsub("^%s+", ""):gsub("%s+$", ""))
-end
-
-local function splitCsv(s)
-  local out = {}
-  s = trim(s)
-  if #s == 0 then return out end
-  for part in s:gmatch("[^,/%s]+") do
-    local v = trim(part)
-    if #v > 0 then table.insert(out, v) end
-  end
-  return out
-end
-
-local function writeFile(path, content, binary)
-  local mode = binary and "wb" or "w"
-  local f = fs.open(path, mode)
-  if not f then return false end
-  f.write(content)
-  f.close()
-  return true
-end
-
-local function prompt(label)
-  term.write(label)
-  return trim(read() or "")
-end
-
-local function promptOptionalUrl(label)
-  local raw = prompt(label)
-  raw = trim(raw)
-  if #raw == 0 then return nil end
-  return raw
-end
-
-local function httpGet(url)
-  if not http then return false, "HTTP API disabled" end
-  local okReq, err = pcall(function()
-    http.request({ url = url, method = "GET" })
-  end)
-  if not okReq then return false, tostring(err) end
-
-  while true do
-    local ev, p1, p2, p3 = os.pullEvent()
-    if ev == "http_success" and p1 == url then
-      local res = p2
-      if type(res) == "table" and type(res.readAll) == "function" then
-        local data = res.readAll()
-        res.close()
-        return true, data
-      end
-      return false, "invalid http response"
-    end
-    if ev == "http_failure" and p1 == url then
-      local err = p2
-      local res = p3
-      if type(p2) == "table" and type(p2.readAll) == "function" then
-        res = p2
-        err = p3
-      end
-      if type(res) == "table" and type(res.readAll) == "function" then
-        local data = res.readAll()
-        res.close()
-        return false, data
-      end
-      return false, tostring(err or "http_failure")
-    end
-  end
-end
-
-local function download(url, path, binary)
-  print("Downloading: " .. path)
-  local ok, data = httpGet(url)
-  if not ok then
-    print("Download failed: " .. tostring(data or ""))
-    return false
-  end
-  if not writeFile(path, data, binary) then
-    print("Write failed: " .. path)
-    return false
-  end
-  return true
-end
-
-local function normalizeMode(raw)
-  return (trim(raw):lower() == "exit") and "exit" or "entry"
-end
-
-term.clear()
-term.setCursorPos(1, 1)
-print("Bidirectional Ticket Gate Installer")
-print("")
-
-local stationsRaw = prompt("Station codes (comma or slash): ")
-local stationCodes = splitCsv(stationsRaw)
-if #stationCodes == 0 then
-  print("No station codes provided.")
-  return
-end
-
-print("")
-print("Set mode for each side (front/back).")
-local frontRaw = prompt("Front mode (entry/exit): ")
-local backRaw = prompt("Back mode (entry/exit): ")
-local frontMode = normalizeMode(frontRaw)
-local backMode = normalizeMode(backRaw)
-local frontStationCode = trim(prompt("Front station code (default first code): "))
-local backStationCode = trim(prompt("Back station code (default first code): "))
-if #frontStationCode == 0 then frontStationCode = stationCodes[1] end
-if #backStationCode == 0 then backStationCode = stationCodes[1] end
-
-print("")
-print("Optional server config for ticket / IC card checks.")
-local ticketServerUrl = promptOptionalUrl("Ticket check URL (blank=auto): ")
-local cardServerUrl = promptOptionalUrl("IC card check URL (blank=same server): ")
-
-local cfg = {
-  station_codes = stationCodes,
-  station_code = stationCodes[1],
-  side_modes = {
-    front = frontMode,
-    back = backMode,
-  },
-  side_station_codes = {
-    front = frontStationCode,
-    back = backStationCode,
-  }
-}
-if ticketServerUrl then cfg.server_url = ticketServerUrl end
-if cardServerUrl then cfg.card_server_url = cardServerUrl end
-local okCfg, cfgJson = pcall(textutils.serializeJSON, cfg)
-if not okCfg then
-  print("Config serialize failed.")
-  return
-end
-if not writeFile(CONFIG_PATH, cfgJson, false) then
-  print("Failed to write config.")
-  return
-end
-
-if not download(URL_PASS, "pass.dfpwm", true) then return end
-if not download(URL_ERROR, "error.dfpwm", true) then return end
-
-local okGate, gateCode = httpGet(URL_GATE)
-if not okGate then
-  print("Download failed: startup")
-  return
-end
-
-writeFile("startup.lua", gateCode, false)
-writeFile("startup", gateCode, false)
-
-print("")
-print("Done.")
-print("This gate now supports tickets and IC cards.")
-print("Attach ticket_inspection_machine on FRONT and BACK.")
-print("Reboot the computer to start the gate.")
diff --git a/update_refillmachine.lua b/update_refillmachine.lua
deleted file mode 100644
index ff9cf20..0000000
--- a/update_refillmachine.lua
+++ /dev/null
@@ -1,81 +0,0 @@
-local URL_MACHINE_HTTPS = "https://cloud.fse-media.group/d/API/TicketMachine/refillmachine.lua?sign=msZNBgD27qgGTwdeHlUxB25Q58386ZjDqorYurXiKqI=:0"
-local URL_MACHINE_HTTP = "http://cloud.fse-media.group/d/API/TicketMachine/refillmachine.lua?sign=msZNBgD27qgGTwdeHlUxB25Q58386ZjDqorYurXiKqI=:0"
-
-local function writeFile(path, content, binary)
-  local mode = binary and "wb" or "w"
-  local f = fs.open(path, mode)
-  if not f then return false end
-  f.write(content)
-  f.close()
-  return true
-end
-
-local function atomicWrite(path, content, binary)
-  local tmp = path .. ".new"
-  if fs.exists(tmp) then fs.delete(tmp) end
-  if not writeFile(tmp, content, binary) then return false end
-  if fs.exists(path) then fs.delete(path) end
-  fs.move(tmp, path)
-  return true
-end
-
-local function httpGet(url)
-  if not http then return false, "HTTP API disabled" end
-  local okReq, err = pcall(function()
-    http.request({ url = url, method = "GET" })
-  end)
-  if not okReq then return false, tostring(err) end
-
-  while true do
-    local ev, p1, p2, p3 = os.pullEvent()
-    if ev == "http_success" and p1 == url then
-      local res = p2
-      if type(res) == "table" and type(res.readAll) == "function" then
-        local data = res.readAll()
-        res.close()
-        return true, data
-      end
-      return false, "invalid http response"
-    end
-    if ev == "http_failure" and p1 == url then
-      local errMsg = p2
-      local res = p3
-      if type(p2) == "table" and type(p2.readAll) == "function" then
-        res = p2
-        errMsg = p3
-      end
-      if type(res) == "table" and type(res.readAll) == "function" then
-        local data = res.readAll()
-        res.close()
-        return false, data
-      end
-      return false, tostring(errMsg or "http_failure")
-    end
-  end
-end
-
-term.clear()
-term.setCursorPos(1, 1)
-print("Refill Machine Updater")
-print("")
-print("Downloading refill machine program...")
-
-local ok, code = httpGet(URL_MACHINE_HTTPS)
-if not ok then
-  ok, code = httpGet(URL_MACHINE_HTTP)
-end
-if not ok or type(code) ~= "string" or #code == 0 then
-  print("Download failed: " .. tostring(code or ""))
-  return
-end
-
-if not atomicWrite("startup.lua", code, false) then
-  print("Write failed: startup.lua")
-  return
-end
-atomicWrite("startup", code, false)
-atomicWrite("refillmachine.lua", code, false)
-
-print("")
-print("Done.")
-print("Reboot the computer to apply the update.")