【网络通信】弱网提示：丢包率的客户端可视化

-- 弱网提示：丢包监测
local panel = GUI:GetParent("MainTop")
local samples = {}
local weakIcon = GUI:Text_Create(panel, "WeakIcon", 700, 10, "", 60, 20)
local function feedSample(lost)
    samples[#samples + 1] = lost and 1 or 0
    if #samples > 20 then table.remove(samples, 1) end
end
local function updateWeakIcon()
    local lostCnt = 0
    for _, s in ipairs(samples) do lostCnt = lostCnt + s end
    local rate = lostCnt / #samples * 100
    if rate > 15 then
        GUI:setText(weakIcon, "信号极弱")
    elseif rate > 5 then
        GUI:setText(weakIcon, "网络不佳")
    else
        GUI:setText(weakIcon, "")
    end
end

-- 提示策略：静默与恢复
local player = class(actor)
local lastLevel, silentUntil = 0, 0
local function onLevelChange(newLevel, now)
    if now < silentUntil then return end
    if newLevel ~= lastLevel then
        lastLevel = newLevel
        silentUntil = now + 10
        sendluamsg(player, 9997, newLevel, 0, 0, "weak")
        if newLevel == 3 then
            SL:ShowSystemTips("网络持续不佳，建议切换 Wi-Fi 或流量")
        end
    end
end