Consider embeddable Assistant 'closeButton' behavior consistent with Gitbook's own Assistant implementation

Description

When configuring closeButton: true via the Node.js embeddable Assistant package, the embedded assistant gets an 'X (Close)' icon in the sidebar in the bottom-left of the assistant, as described in this README.md (though missing in the public docs). With an otherwise-empty side-bar (no tabs, no actions), this populates a side-bar with only an 'X (Close)' button, uses ~60px of space

On the Gitbook docs site, the Assistant launches with an 'X (Close)' button in the top right, near the '[Trash can] (Clear conversation)' button, if you have chat content. This seems like an ideal UI, and what I assumed closeButton: true configuration would enable.

Any chance y'all would consider moving the embeddable Assistant behavior (Node.js/React/etc) to mirror the internal Gitbook assisant, with a top-right-aligned 'X (Close)' button for closeButton: true configurations?

Screenshots

• My embedded Node.js instance

• Gitbook's instance

How to reproduce

1. Basic Node.js setup, using gitbook = createGitbook(...) => frame = gitbook.createFrame(...) => frame.configure({ ..., closeButton: true })
2. Open assistant, with 'X (Close)' in bottom left, on a left-aligned side-bar

Start with the embeddable Assistant configuration entry point described in packages/embed/README.md, especially the closeButton option, and compare it with the behavior shown on the GitBook docs site. Reproduce the Node.js setup with frame.configure({ closeButton: true }) and determine whether the completed behavior places Close in the top-right alongside Clear conversation without creating a sidebar-only control.