穿戴规则：同类装备只占一个槽位

-- 错误：只往已穿列表里追加，不查槽位
table.insert(worn, equipId)
setplayvar(p, "ATK", getplayvar(p, "ATK") + atkOf(equipId))

local function atkOf(id)
    local cfg = {[9101] = 50, [9102] = 80}
    return cfg[id] or 0
end
local function wearEquip(p, equipId, slot)
    local key = "slot_" .. slot
    local old = getplayvar(p, key)
    local gain = atkOf(equipId) - atkOf(old)
    if old then
        giveitem(p, old, 1)
    end
    setplayvar(p, key, equipId)
    setplayvar(p, "ATK",
        (getplayvar(p, "ATK") or 0) + gain)
    sendmsg(p, 1, "攻击变化 " .. gain)
end