【后端接口】坐骑装备：鞍具蹄铁与坐骑属性

local MOUNT_SLOTS = { saddle = 1, horseshoe = 2 }
function MountEquip.wear(actor, mountIdx, slot, itemId)
    local mount = actor:GetMount(mountIdx)
    if not mount then return false, "坐骑不存在" end
    local def = MOUNT_EQUIP_DEF[itemId]
    if not def or def.slot ~= slot then return false, "装备位置不符" end
    if mount.equip[slot] then return false, "该位置已有装备" end
    if not actor:TakeItemByName(itemId, 1) then return false, "缺少装备" end
    mount.equip[slot] = itemId
    MountRecalc(actor, mountIdx)
    return true
end

function MountRecalc(actor, mountIdx)
    local mount = actor:GetMount(mountIdx)
    local speedBonus, loadBonus = 0, 0
    for _, itemId in pairs(mount.equip) do
        local def = MOUNT_EQUIP_DEF[itemId]
        speedBonus = speedBonus + (def.speed or 0)
        loadBonus = loadBonus + (def.load or 0)
    end
    mount.totalSpeed = MOUNT_BASE_SPEED + speedBonus
    mount.totalLoad = MOUNT_BASE_LOAD + loadBonus
end