Add inline title editing on double-click in sidebar
Double-clicking a conversation title in the left sidebar now enters
inline edit mode directly in the row, without opening a modal. The
input inherits the container's fixed height so there is no vertical
resize. Enter saves, Escape cancels, blur saves. The existing edit
button and modal remain available as an alternative.
https://claude.ai/code/session_01J1eWycuKWHzx3HWwp4d63g
