【引擎触发】摆摊市场：盟重摆摊区的摊位管理与搜索

local STALL_ZONE = { map = "mengzhong", x1 = 200, y1 = 200, x2 = 260, y2 = 260 }
function QF.OpenStall(plr, stallName)
    if not plr:InZone(STALL_ZONE) then return false, "请到盟重摆摊区" end
    if plr:GetLevel() < 20 then return false, "20 级开放摆摊" end
    if StallMgr.countByOwner(plr.id) >= 1 then return false, "已有摊位" end
    local stall = StallMgr.create(plr, stallName)
    QF_BroadcastMap(STALL_ZONE.map, plr.name .. " 的「" .. stallName .. "」开张了")
    return stall
end

function QF.StallSell(plr, slot, price)
    local item = plr.bag[slot]
    if item.bind then return false, "绑定物品不可出售" end
    if price > 50000000 then return false, "单件限价 5000 万" end
    plr.stall:Add(item, price)
    return true
end

function QF.StallBuy(buyer, stallId, offerId)
    local stall = StallMgr.get(stallId)
    local offer = stall.offers[offerId]
    if not offer then return false, "已售出" end
    if not buyer:TakeGold(offer.price) then return false, "金币不足" end
    buyer:AddItem(offer.item)
    QF_MailGold(stall.owner, math.floor(offer.price * 0.97), "摆摊售出")
    stall.offers[offerId] = nil
    TradeLog.write("stall", buyer.id, stall.owner, offer.item.id, offer.price)
    return true
end