Add a detached multi-tab editor window with acknowledged content ownership, focused Monaco shortcuts, and shared close/save confirmation. Preserve source contents until handoff acknowledgement and block edits or incoming transfers during ownership changes.
Continuation of #3439. Original implementation by pplulee.
Co-authored-by: pplulee <hi@pplulee.me>
Co-authored-by: Cursor <cursoragent@cursor.com>
陈大猫