【后端接口】天赋树：三系天赋的加点与洗点消耗

local TALENT_TREE = {
    attack = { { id = "atk1", need = 0, val = 20 }, { id = "atk2", need = 1, val = 45 } },
    defense = { { id = "def1", need = 0, val = 30 } },
    common = { { id = "cd1", need = 0, val = 10 } },
}
function Talent.addPoint(actor, branch, nodeId)
    local node = TALENT_TREE[branch][nodeId]
    local spent = Talent.spentPoints(actor, branch)
    local have = actor:GetLevel() - 60
    if spent + 1 > have then return false, "天赋点不足" end
    if nodeId > 1 and Talent.nodeLevel(actor, branch, nodeId - 1) < 1 then
        return false, "先点亮前置节点"
    end
    Talent.setLevel(actor, branch, nodeId, 1)
    recalcabilitys(actor)
    return true
end

function Talent.resetBranch(actor, branch)
    local spent = Talent.spentPoints(actor, branch)
    if spent == 0 then return false, "该分支未加点" end
    local fee = spent * 50000
    if not actor:TakeGold(fee) then return false, "需要 " .. fee .. " 金币洗点" end
    Talent.clearBranch(actor, branch)
    recalcabilitys(actor)
    sendmsg(actor, 1, "已洗点，返还 " .. spent .. " 点天赋点")
    return true
end