The social-share buttons function was hooked to
projects_after_download_button, but the template never fired that action —
the buttons never rendered. Added a do_action() call after the View Repo
button.
The Follow button hardcoded a GitHub URL and used the GitHub-specific
github-button class (which only acts on github.com). Replaced with a
plain styled link pointing at the owner's actual URL (works for any
provider). Removed the assets/js/buttons.js enqueue since nothing uses
the github-button class anymore.
Renamed the project-github-button CSS class on the View Repo link to
project-repo-button since it's provider-neutral now.