Setup

1. Open script.google.com, deploy your project as a Web App: Execute as → Me, Access → Anyone.
2. Copy the deployment URL (https://script.google.com/macros/s/…/exec) and paste it below.
3. On ?action=data the script must return JSON with keys ornament-top-right, ornament-bottom-left, ornament-inline, and projects (array).
4. On ?action=update POST the script receives the same structure and persists it to Sheets.