重做3个最终boss，重做法师部分技能，添加技能树升级，测试模式ui调整，添加游戏角色音效 - #10

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/