apps/web/src/components/Sidebar.logic.test.ts   |  17 +++
 apps/web/src/components/Sidebar.logic.ts        |  28 +++++
 apps/web/src/components/Sidebar.pointer.test.ts |  15 ++-
 apps/web/src/components/Sidebar.pointer.ts      |   7 +-
 apps/web/src/components/Sidebar.tsx             | 181 ++++++++++++++++++++++++++++----
 docs/user/thread-sidebar.md                     |   5 +
 6 files changed, 225 insertions(+), 28 deletions(-)