Release

This alpha turns GraphStudio-in-the-browser from ‘it opens’ into ‘it works’: drag & drop, context menus, and whole-folder drops all function; face detection and portrait matting ship with default models; plus .tgp single-file project bundles and wgpu as the default GPU backend.

The three packaging commands (package_macos.py / package_linux.py / build_msix.ps1), their dependencies and outputs, and the four-channel versioning of the GitHub Actions release pipeline.