Draggable nool: captured-geometry drag rewrites, plus navigation, sound, undo, and persistence - #6

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/cache@v4, actions/checkout@v4, actions/setup-node@v3, nelonoel/branch-name@v1.0.1. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/