apps/web/src/appSettings.test.ts                  |   7 ++
 apps/web/src/appSettings.ts                       |   6 ++
 apps/web/src/components/ChatView.tsx              |   3 +
 apps/web/src/components/DiffPanel.tsx             |  12 ++--
 apps/web/src/components/PlanSidebar.tsx           |   7 +-
 apps/web/src/components/chat/MessagesTimeline.tsx |  19 +++--
 apps/web/src/routes/_chat.settings.tsx            | 123 +++++++++++++++++++++++---------
 apps/web/src/session-logic.ts                     |   8 ---
 apps/web/src/timestampFormat.test.ts              |  30 ++++++++
 apps/web/src/timestampFormat.ts                   |  49 +++++++++++++
 10 files changed, 209 insertions(+), 55 deletions(-)