This commit introduces a web-based admin UI to manage the store's status, backed by a simple Node.js/Express server for file writing.
Key features:
- **Admin UI (, ):** A form to update the scrolling message and closed status. It provides a user-friendly experience with loading states, in-page feedback, and change detection.
- **Node.js Backend ():** A simple Express server that serves the static site and provides a endpoint. This endpoint receives data from the admin UI, authenticates it, and writes it to .
- **Enhanced Security:** The password is no longer hardcoded in the client-side JavaScript. Authentication is handled server-side, and the password is read from a file for local development or an environment variable in production.
- **Project Setup (, ):** The project is now a formal Node.js project with dependencies (, , ) and a file to exclude .
