【前端接口】邮件附件明细展开：附件内容的界面预览实现

SL:RegisterLuaNetMsg(9801, function(data)
    for i, att in ipairs(data.items or {}) do
        GUI:ItemBox_Create(detail, "att" .. i, 12 + (i - 1) * 52, 8, att.icon, 1)
        GUI:Text_Create(detail, "an" .. i, 12 + (i - 1) * 52, 62, att.name .. "×" .. att.num, 12, { 220, 220, 220 })
    end
end)

local function claimOne(idx)
    SL:SendNetMsg(9802, { mailId = curMailId, slot = idx })
end
SL:RegisterLuaNetMsg(9803, function(data)
    if data.ok == 1 then
        GUI:setOpacity(detail["att" .. data.slot], 90)
    end
end)