apps/web/src/hooks/showUndoToast.test.ts         | 95 ++++++++++++++++++++++++++++++++
 apps/web/src/hooks/showUndoToast.ts              | 61 ++++++++++++++++++++
 apps/web/src/hooks/threadUndo.test.ts            | 44 +++++++++++++++
 apps/web/src/hooks/threadUndo.ts                 | 21 +++++++
 apps/web/src/hooks/useThreadActions.ts           | 23 +++++++-
 apps/web/src/hooks/useThreadActions.undo.test.ts | 69 +++++++++++++++++++++++
 docs/user/thread-sidebar.md                      |  2 +
 7 files changed, 313 insertions(+), 2 deletions(-)