【界面UI】血条Buff图标排列：状态图标的换行合并与上限显示

local function layoutBuff(idx, widget)
    local row = math.floor((idx - 1) / 8)
    local col = (idx - 1) % 8
    GUI:setPosition(widget, col * 28, -row * 28)
end
local function addBuffIcon(name, img)
    buffCount = buffCount + 1
    local box = GUI:ItemBox_Create(buffBar, "bf" .. buffCount, 0, 0, img, 1)
    layoutBuff(buffCount, box)
end

local exist = {}
local function stackBuff(name, img, layer)
    if exist[name] ~= nil then
        local tag = layer > 99 and "99+" or tostring(layer)
        GUI:setText(exist[name], tag)
        return
    end
    addBuffIcon(name, img)
    local num = GUI:Text_Create(buffBar, "num_" .. name, 18, -6, tostring(layer), 12, { 255, 255, 80 })
    exist[name] = num
end