apps/server/src/environment/ServerEnvironment.test.ts    |   1 +
 apps/server/src/environment/ServerEnvironment.ts         |   1 +
 apps/server/src/server.test.ts                           |  96 ++++++++
 apps/server/src/ws.ts                                    |  15 +-
 apps/web/src/components/BranchToolbar.tsx                |  36 ++-
 apps/web/src/components/BranchToolbarBranchSelector.tsx  |   6 +-
 apps/web/src/components/BranchToolbarEnvModeSelector.tsx |  18 +-
 apps/web/src/components/ChatView.tsx                     | 401 +++++++++++++++++++++++++++++++-
 apps/web/src/components/chat/ChatComposer.tsx            |  83 ++++++-
 apps/web/src/components/chat/ModelListRow.tsx            |   6 +-
 apps/web/src/components/chat/ModelPickerContent.tsx      |  66 +++++-
 apps/web/src/components/chat/ProviderModelPicker.tsx     |  72 +++++-
 docs/user/thread-sidebar.md                              |   5 +
 packages/client-runtime/src/errors/orchestration.test.ts |  29 ++-
 packages/client-runtime/src/errors/orchestration.ts      |   6 +
 packages/contracts/src/environment.test.ts               |  10 +
 packages/contracts/src/environment.ts                    |   2 +
 packages/contracts/src/orchestration.test.ts             |  14 ++
 packages/contracts/src/orchestration.ts                  |   3 +-
 19 files changed, 814 insertions(+), 56 deletions(-)