【框架设计】仇人系统：仇人列表与复仇追踪

---playdie: 被杀触发，凶手进仇人列表
function playdie(self, hiter)
    local player = class(self)
    if not player then return end
    if not hiter or not hiter:IsPlayer() then return end
    -- 正当场景豁免：攻城战与切磋不记仇
    if Siege.running and self.mapId == "shabake" then
        return
    end
    if Duel.inDuel(self, hiter) then
        return
    end
    -- 登记仇人：保留 7 天
    setplayvar(self, "HUMAN",
        "Foe_" .. hiter:GetUserId(), os.time(), 1)
    sendmsg(self, 1, hiter:GetName() ..
        " 已加入个人仇人列表（7 天）")
end

---仇人的追踪：上线提醒与位置提示
setontimerex(115, 300)
function Foe.track(actor)
    local player = class(actor)
    if not player then return end
    local foes = Foe.listOf(actor)
    for uid, markedAt in pairs(foes) do
        if os.time() - markedAt < 7 * 86400 then
            local foe = getplayerbyname(uid)
            if foe and foe:IsOnline() then
                sendmsg(actor, 1, "宿敌 " ..
                    foe:GetName() .. " 正在线，" ..
                    "位于 " .. foe.mapId)
                return     -- 每次只提示一位
            end
        end
    end
end