Focus not moved when image edit panel opens

What’s broken?

After inserting an image (via / or /image/), the first command menu collapses but the focus remains on it. The image edit panel opens without the focus being moved to it and without any information being provided to the user indicating that a new panel is now available.

Impact

A blind user navigating with a screen reader inserts an image: the first menu collapses, the focus remains on it, and the edit panel opens silently. The user does not know that the panel is available and cannot access it without a mouse.

What did you expect to happen?

When the image edit panel opens, the focus must be moved to this panel or to its first interactive element. If moving the focus is not desirable, the panel opening must be announced via an aria-live region.

Steps to reproduce

Open a Docs document
Navigate using keyboard only
Insert an image via / or /image/
Notice that the focus remains on the first collapsed menu; the edit panel is open but inaccessible without a mouse

BlockNote version

0.51.1

Start by reproducing the issue in a Docs document with keyboard navigation, inserting an image via / or /image/. Trace the image edit panel opening and its focus behavior. Done means focus reaches the panel or its first interactive element, or the panel opening is announced through an aria-live region, and the keyboard-only flow is accessible to a screen reader user.