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.

packages/client/ui-layout/tests/layout-store.client.spec.ts

@@ -0,0 +1,103 @@
+// @vitest-environment jsdom
+/**
+ * createLayoutStore unit account: init shape, the action write set (clamp
+ * inside actions), and the absence of browser persistence. Uses the
+ * test-sanctioned path: factory self-call + .create() gives the
+ * real engine instance (same create path as production).
+ */
+import { beforeEach, describe, expect, it } from 'vitest'
+import { createLayoutStore } from '@deepseek-ai/dsh-client-ui-layout/src/client/stores.ts'
+import {
+  DETAILS_DEFAULT, DETAILS_MAX, DETAILS_MIN,
+  SIDEBAR_DEFAULT, SIDEBAR_MAX, SIDEBAR_MIN,
+} from '@deepseek-ai/dsh-client-ui-layout/src/client/columns.ts'
+
+const PERSIST_KEY = 'dsh.layout.panels'
+
+beforeEach(() => { localStorage.clear() })
+
+describe('createLayoutStore', () => {
+  it('initializes the sidebar at its default width, details closed, wide viewport assumed', () => {
+    const { store } = createLayoutStore().create()
+    expect(store.getSnapshot()).toEqual({ sidebar: SIDEBAR_DEFAULT, details: 0, narrow: false, narrowExpanded: false })
+  })
+
+  it('each create() is an independent instance (factory is not a singleton)', () => {
+    const a = createLayoutStore().create()
+    const b = createLayoutStore().create()
+    a.actions.setSidebar(400)
+    expect(b.store.getSnapshot().sidebar).toBe(SIDEBAR_DEFAULT)
+  })
+
+  it('setSidebar/setDetails clamp into the contract ranges', () => {
+    const { store, actions } = createLayoutStore().create()
+    actions.setSidebar(1)
+    expect(store.getSnapshot().sidebar).toBe(SIDEBAR_MIN)
+    actions.setSidebar(9999)
+    expect(store.getSnapshot().sidebar).toBe(SIDEBAR_MAX)
+    actions.setDetails(1)
+    expect(store.getSnapshot().details).toBe(DETAILS_MIN)
+    actions.setDetails(9999)
+    expect(store.getSnapshot().details).toBe(DETAILS_MAX)
+  })
+
+  it('toggleSidebar flips closed <-> contract default (drag width forgotten)', () => {
+    const { store, actions } = createLayoutStore().create()
+    actions.setSidebar(400)
+    actions.toggleSidebar()
+    expect(store.getSnapshot().sidebar).toBe(0)
+    actions.toggleSidebar()
+    expect(store.getSnapshot().sidebar).toBe(SIDEBAR_DEFAULT)
+  })
+
+  it('narrow toggleSidebar flips only the re-expand override; the width preference survives', () => {
+    const { store, actions } = createLayoutStore().create()
+    actions.setSidebar(400)
+    actions.setNarrow(true)
+    actions.toggleSidebar()
+    expect(store.getSnapshot()).toEqual({ sidebar: 400, details: 0, narrow: true, narrowExpanded: true })
+    actions.toggleSidebar()
+    expect(store.getSnapshot().narrowExpanded).toBe(false)
+    expect(store.getSnapshot().sidebar).toBe(400)
+  })
+
+  it('crossing the breakpoint drops the override; a same-value setNarrow keeps it', () => {
+    const { store, actions } = createLayoutStore().create()
+    actions.setNarrow(true)
+    actions.toggleSidebar()
+    expect(store.getSnapshot().narrowExpanded).toBe(true)
+    actions.setNarrow(true)
+    expect(store.getSnapshot().narrowExpanded).toBe(true)
+    actions.setNarrow(false)
+    expect(store.getSnapshot()).toMatchObject({ narrow: false, narrowExpanded: false })
+    actions.setNarrow(true)
+    expect(store.getSnapshot().narrowExpanded).toBe(false)
+  })
+
+  it('openDetails uses the contract default, preserves an open width, and closeDetails zeroes', () => {
+    const { store, actions } = createLayoutStore().create()
+    actions.openDetails()
+    expect(store.getSnapshot().details).toBe(DETAILS_DEFAULT)
+    actions.setDetails(500)
+    actions.openDetails()
+    expect(store.getSnapshot().details).toBe(500)
+    actions.closeDetails()
+    expect(store.getSnapshot().details).toBe(0)
+  })
+
+  it('does not persist panel geometry', () => {
+    const first = createLayoutStore().create()
+    first.actions.setSidebar(400)
+    first.actions.openDetails()
+    first.actions.setDetails(500)
+    expect(localStorage.getItem(PERSIST_KEY)).toBeNull()
+
+    const second = createLayoutStore().create()
+    expect(second.store.getSnapshot()).toEqual({
+      sidebar: SIDEBAR_DEFAULT,
+      details: 0,
+      narrow: false,
+      narrowExpanded: false,
+    })
+  })
+})