跨天刷新：零点重置的提示时机

-- 错误：各界面自建日期判断，口径不一
function checkSelf()
    if lastDay ~= os.date("%Y%m%d") then
        resetSelf()
    end
end

local today = os.date("%Y%m%d")
local function onTick()
    local now = os.date("%Y%m%d")
    if now ~= today then
        today = now
        broadcast("dayChange")
    end
end