v0.288.0

Editors

• Document hosts can open the comment pane with defaultCommentsOpen and receive the mounted TipTap editor from onEditorReady.
• Ribbon and selection popovers escape a clipped host ancestor onto a theme-preserving floating root. Dialogs stay inside [data-a3s-office] so the editor surface remains inert.
• A host may project collaboration presence without binding the CRDT session. Kind mismatches still fail closed.

Full notes: CHANGELOG.md