抽卡展示：结果先定动画后播

-- 错误：动画播完再取结果，中途变量被改
function onAnimeEnd()
    showCard(fetchResult())
end

local function onDrawResult(result)
    local seq = tonumber(readDraft("drawSeq") or "0") + 1
    writeDraft("drawSeq", seq)
    writeDraft("draw_" .. seq, result)
    playAnime(result, function()
        showCard(result)
    end)
end