【入门夯实】指令失配：string.lower统一大小写归一

local function onGM(actor, cmd)
    if cmd == "@SABUK" or cmd == "@sabuk" then
        openSabukGate(actor)
    end
end

local CMDS = {}
local function registerCmd(word, fn)
    CMDS[string.lower(word)] = fn
end
local function onGM(actor, cmd)
    actor = getplayerbyname(actor)
    local fn = CMDS[string.lower(cmd)]
    if fn == nil then
        sendmsg(actor, 1, "未知指令：" .. cmd)
        return
    end
    fn(actor)
end

local function normalize(word)
    return string.lower(string.gsub(word, "^@", ""))
end