Merge remote-tracking branch 'origin/master' into feat/web-message-feedback-ui

Adapt to two contract changes master introduced:

- The generated Remote face now wraps every business result in
  RemoteResult, folding carrier failures into an ok:false branch instead
  of rejecting. The controller reads that envelope at its three call
  sites and maps a carrier failure onto the same settled shape the
  controls already render; three specs cover the new branch.
- Client packages split their tsconfig into host and client halves, and
  the host aggregate now compiles any test not named *.client.spec.*.
  Rename this package's specs to the client convention and drop the
  ../connection project reference, which pointed at a solution file that
  no longer carries the client sources.

Keep master's mount loop with its rollback-on-failure in api-remotes and
add messageFeedbackRemote to it.

apps/web/tests/goal-multi-turn-actions.e2e.ts

@@ -29,7 +29,7 @@ const PACKAGE_FILES: Readonly<Record<string, string>> = {
   'packages/client/ui-conversation/README.md': '# UI conversation\n',
   'packages/client/ui-conversation/package.json': '{"name":"@deepseek-ai/dsh-client-ui-conversation"}\n',
   'packages/client/ui-conversation/src/client.ts': 'export {}\n',
-  'packages/client/ui-conversation/tests/chat-view.spec.tsx': 'export {}\n',
+  'packages/client/ui-conversation/tests/chat-view.client.spec.tsx': 'export {}\n',
   'packages/context/session-reference/README.md': '# Session reference\n',
   'packages/context/session-reference/package.json': '{"name":"@deepseek-ai/dsh-session-reference"}\n',
   'packages/context/session-reference/src/index.ts': 'export {}\n',