【框架设计】仇人系统：击杀记录与复仇追踪

function Foe.record(victim, killer)
    if killer.camp == victim.camp then return end
    local list = victim.foes or {}
    for i, f in ipairs(list) do
        if f.id == killer.id then table.remove(list, i) break end
    end
    table.insert(list, 1, {
        id = killer.id, name = killer.name,
        at = os.time(), map = killer.mapId,
    })
    if #list > 20 then table.remove(list) end
    victim.foes = list
end

function Foe.trace(plr, index)
    local foe = plr.foes and plr.foes[index]
    if not foe then return false end
    if os.time() - foe.at > 3600 then return false, "追踪已过期" end
    local target = QF_GetPlayer(foe.id)
    if not target or not target.online then return false, "目标不在线" end
    QF_ShowDirection(plr, target.mapId, target.x, target.y)
    return true
end