【引擎触发】magicattack：法师魔法攻击的伤害流

---magicattack: 人物魔法攻击触发
function magicattack(self, Target, Hiter, MagicId)
    local player = class(self)
    if not player then return end
    -- 魔法命中的距离校验：雷电术射程 8 格
    if MagicId == getskillindex("雷电术") then
        local dist = Magic.distOf(self, Target)
        if dist > 8 then
            sendmsg(self, 1, "目标超出法术射程")
            return
        end
        -- 魔法命中的浮动：90% 到 110%
        local rate = 90 + math.random(0, 20)
        setplayvar(self, 2, "MagicRate", rate, 0)
    end
end

---法力回复：击杀返还的机制
function Magic.manaRefund(self, monName)
    local player = class(self)
    if not player then return end
    -- 击杀返还 30% 的上次蓝耗
    local lastCost = tonumber(getplayvar(self, 2, "LastMP")) or 0
    local refund = math.floor(lastCost * 0.3)
    if refund > 0 then
        Magic.addMP(self, refund)
        sendmsg(self, 1, "法力涌动：回复 " .. refund .. " 点魔法")
    end
end