【后端接口】坐骑合成：碎片收集与品质保底

local MOUNT_FRAGMENT = 10
function MountCraft.compose(actor)
    local frag = getbagitemcount(actor, "坐骑碎片", 0)
    if frag < MOUNT_FRAGMENT then
        return false, "还差 " .. (MOUNT_FRAGMENT - frag) .. " 个碎片"
    end
    delitembymakeindex(actor, "坐骑碎片", MOUNT_FRAGMENT, "坐骑合成")
    local quality = 1
    if math.random(1, 100) <= 20 then quality = 2 end
    giveitem(actor, "坐骑" .. quality .. "阶", 1, 1, "坐骑合成")
    return true
end

function MountCraft.pityCheck(actor)
    local composeCount = getplayvar(actor, "HUMAN", "mount_compose_n") or 0
    if composeCount >= 5 then
        setplayvar(actor, "HUMAN", "mount_compose_n", 0, 1)
        giveitem(actor, "坐骑2阶", 1, 1, "合成保底")
        sendmsg(actor, 1, "保底触发：直接获得二阶坐骑")
        return true
    end
    return false
end