Lua定时器句柄：注册收藏与统一取消

-- 错误：句柄随手一丢，销毁后定时器照跑
scheduler:scheduleScriptFunc(function()
    refresh()
end, 1, false)

local handles = {}
local function after(sec, fn)
    local h = scheduler:scheduleScriptFunc(fn, sec, false)
    handles[#handles + 1] = h
    return h
end
local function clearAll()
    for _, h in ipairs(handles) do
        scheduler:unscheduleScriptEntry(h)
    end
    handles = {}
end