【后端接口】行会建筑升级：建筑等级与行会福利接口

-- 行会建筑：升级接口
local player = class(actor)
local BUILD_REQ = {
    hall = {guildLv = 3, fund = 100000},
    arsenal = {guildLv = 2, fund = 80000},
}
local upgrading = {}
local function upgradeBuilding(player, building)
    local req = BUILD_REQ[building]
    if req == nil then
        sendmsg(player, 1, 0, "未知建筑。")
        return
    end
    if upgrading[building] then
        sendmsg(player, 1, 0, "该建筑正在升级中。")
        return
    end
    local fund = tonumber(getplayvar(player, "GUILD", "Fund") or 0)
    if fund < req.fund then
        sendmsg(player, 1, 0, "行会基金不足，还差 " .. req.fund - fund .. "。")
        return
    end
    upgrading[building] = true
    setplayvar(player, "GUILD", "Fund", fund - req.fund, true)
    setplayvar(player, "GUILD", "BuildingLv_" .. building,
        tonumber(getplayvar(player, "GUILD", "BuildingLv_" .. building) or 0) + 1, true)
    upgrading[building] = nil
    sendmsg(player, 1, 0, building .. " 升级成功，新福利已解锁。")
end

-- 行会福利：等级映射
local player = class(actor)
local function applyBuildingPerks(player)
    local hallLv = tonumber(getplayvar(player, "GUILD", "BuildingLv_hall") or 0)
    local arsenalLv = tonumber(getplayvar(player, "GUILD", "BuildingLv_arsenal") or 0)
    setplayvar(player, "HUMAN", "MemberCap", 50 + hallLv * 5, true)
    setplayvar(player, "HUMAN", "AtkBonusPct", arsenalLv, true)
    if arsenalLv > 0 then
        addbuff(player, 10131, 0, 0, player)
        sendmsg(player, 1, 0, "行会建筑加成生效：攻击 +" .. arsenalLv .. "%。")
    end
end