【后端接口】经验副本：波次刷怪与倍率窗口

---经验副本：进入与波次刷怪
function ExpDungeon.enter(actor)
    local player = class(actor)
    if not player then return false end
    local cnt = tonumber(getplayvar(actor, 2, "DgCount")) or 0
    if cnt >= 2 then
        sendmsg(actor, 1, "今日次数已用完（每日 2 次）")
        return false
    end
    if not checkitemw(actor, "副本令牌", 1) then
        sendmsg(actor, 1, "需要副本令牌")
        return false
    end
    takeitem(actor, "副本令牌", 1, 0, "经验副本")
    setplayvar(actor, "HUMAN", "DgCount", cnt + 1, 1)
    mapmove(actor, "exp_dg", 20, 20, 0)
    ExpDungeon.startWave(actor, 1)
    return true
end

---双倍窗口：时段与道具的叠加规则
function ExpDungeon.expRate(actor)
    local rate = 100
    local hm = tonumber(os.date("%H%M"))
    -- 时段窗口：14:00-16:00 双倍
    if hm >= 1400 and hm <= 1600 then
        rate = rate + 100
    end
    -- 经验符：1.5 倍的道具加成（乘算独立）
    if (getplayvar(actor, 2, "ExpCharm") or "") ~= "" then
        rate = math.floor(rate * 1.5)
    end
    return rate
end

---击杀的经验结算
function ExpDungeon.onKill(actor, monName)
    local base = MON_EXP[monName] or 100
    local rate = ExpDungeon.expRate(actor)
    local exp = math.floor(base * rate / 100)
    humanhp(actor, "+", 0)
    Group.addExp(actor, exp)
    sendmsg(actor, 1, "获得经验 " .. exp .. "（倍率 " .. rate .. "%）")
end