[FIX] 스플래시 로고 잘림 및 EAS 빌드 환경 설정 정리 - #87

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/github-script@v7. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/