【工具链】崩溃上报：Lua 错误的自动收集与聚合

---全局错误钩子：所有 pcall 失败的统一出口
function GlobalErrorHook(err)
    local trace = debug.traceback(err, 2)
    local fingerprint = md5str(firstLines(trace, 3))
    ErrorReport.push({
        fp = fingerprint, msg = err, trace = trace,
        scene = currentScene(), version = CLIENT_VERSION, at = os.time(),
    })
    SL:ShowSystemTips("发生了一个问题，已自动上报")
end

---错误聚合：按指纹分组排序
function ErrorReport.aggregate(day)
    local groups = {}
    for _, rep in ipairs(ErrorReport.load(day)) do
        local g = groups[rep.fp]
        if not g then
            g = { count = 0, sample = rep.trace, scene = rep.scene }
            groups[rep.fp] = g
        end
        g.count = g.count + 1
    end
    local sorted = sortbyCount(groups)
    QF_PushToDash(sorted)
end