install & remove — data-only packages, live without a deploy
Install a template — drop a package .zip here, or
Packages: manifest.json + theme.json + pages/*.json (+ fonts/, thumbnail.png) — see docs/TEMPLATES.md.
Built-in templates ship with the app, which publishes them to the bucket on start-up; they are
listed read-only (no Remove) so their layouts can be toggled. The app picks changes up within ~30 s.