v2.1.1: 편집 패널 값 맞추기, 홈 안내, 크기 단계 판정, 미리보기 복구, 개발자 표시·기록 - #9

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, actions/setup-dotnet@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/