docs(web): record workspace sidebar behavior

packages/client/ui-sidebar/README.i18n.yaml

@@ -2,5 +2,5 @@
 # side as of the last confirmed-consistent state. Both languages carry equal authority;
 # after editing either side, bring the other along and re-record with:
 #   pnpm run verify-translation-pairing --write packages/client/ui-sidebar/README.md
-README.md: 45ae267d98b17bbc612cf932f5b95b42ba6ff4bf
-README.zh.md: a9fb927305d0bab5fb4d27adbfdbec90dfa1dd6d
+README.md: 10a3bdaf96512124e88b82f643930241671e066d
+README.zh.md: 11b0aa142cf62626ab6105e2c405d506e35349b0

packages/client/ui-sidebar/README.md

@@ -2,11 +2,11 @@
 
 English | [中文](README.zh.md)
 
-Sidebar plugin: real Host Workspaces in stable Host order, each containing its `sessionIds` in Workspace order with `parentId` nesting; Sessions outside every Workspace appear in a trailing `Ungrouped` section. Search, state dots, and collapse into the layout-owned 56px rail are presentation-local. Contract: the [slot system standard](../../../.agents/notes/implemented/architecture/2026-07-22-slot-type-chain-implementation.md).
+Sidebar shell plugin: the wordmark, New Session action, layout-owned collapse control, scroll-aware region seat, and bottom-pinned Settings seat. [ui-workspace](../ui-workspace/README.md) owns the Workspace and Session browser rendered into `sidebar.workspaces`; this package neither derives its rows nor owns its view preferences. Collapse into the layout-owned 56px rail remains presentation-local. Contract: the [slot system standard](../../../.agents/notes/implemented/architecture/2026-07-22-slot-type-chain-implementation.md).
 
-New Session starts the runtime's page-local frontend Session Intent; a real Workspace's "+" starts one targeted to that Workspace. The Workspace header "+" opens ui-workspace's shared picker, whose selection also targets a frontend Session. A Workspace Intent does not appear in the sidebar.
+New Session starts the runtime's page-local frontend Session Intent. The runtime targets the explicit Workspace used by a scoped action, otherwise the current Session's Workspace, otherwise the most recently active Workspace; when none exists it clears into the blank New Session page. Workspace-specific controls and the shared picker belong to ui-workspace.
 
-`SidebarRootComponentProps` composes the layout owner share, the global `useSessions` and `useWorkspaces` hooks, the declared `sidebar.workspace` and `sidebar.settings` child slots, and injected `startSession`, `open`, and sidebar-toggle callbacks. There is no plugin store: `deriveGroups` consumes object-layer snapshots and component-local expansion/search state.
+`SidebarRootComponentProps` composes the layout owner share, the global `useSessions` and `useWorkspaces` hooks, the declared `sidebar.workspaces` and `sidebar.settings` child slots, and injected `startSession` plus sidebar-toggle callbacks. There is no plugin store.
 
 Scrollbars in the column are a pointer affordance: the shell rebinds ui-theme's [scrollbar indirection](../ui-theme/README.md) to `transparent` whenever the pointer is outside it, and keeps the thumb drawn for 2s after the pointer leaves, so a list nobody is pointing at carries no bar. The reservation that keeps rows from moving belongs to the scrolling region ([ui-workspace](../ui-workspace/README.md)), so revealing a thumb never reflows.
 
@@ -25,5 +25,5 @@ None; this package neither assembles nor sends a provider request.
 ## Known Limitations and Deferred Work
 
 - **Session state-dot rendering is owned by [ui-workspace](../ui-workspace/README.md)** — no done/error notification sources are available.
-- **Group-by supports Workspace only** — Update and Status are not available strategies.
+- **Workspace browser behavior is composition-owned** — grouping, ordering, search, and row state belong to [ui-workspace](../ui-workspace/README.md), not this shell.
 - **"New task completed" unread marking is local viewing state** — completion-time > last-seen never reaches the host.

packages/client/ui-sidebar/README.zh.md

@@ -2,11 +2,11 @@
 
 [English](README.md) | 中文
 
-侧边栏插件：真实 Host Workspace 按稳定的 Host 顺序排列；每个 Workspace 按自身顺序包含其 `sessionIds`，并以 `parentId` 嵌套；不属于任何 Workspace 的会话显示在末尾的 `Ungrouped` 分区。搜索、状态点以及折叠到布局拥有的 56px 轨道，都只属于呈现层。约定：[slot 系统标准](../../../.agents/notes/implemented/architecture/2026-07-22-slot-type-chain-implementation.md)。
+侧边栏外壳插件：负责字标、New Session 操作、布局持有的折叠控件、可感知滚动的区域 seat，以及固定在底部的 Settings seat。[ui-workspace](../ui-workspace/README.md) 持有渲染到 `sidebar.workspaces` 的 Workspace 与 Session 浏览器；本包既不派生其中的行，也不持有其视图偏好。折叠到布局拥有的 56px 轨道仍属于本地呈现行为。约定：[slot 系统标准](../../../.agents/notes/implemented/architecture/2026-07-22-slot-type-chain-implementation.md)。
 
-New Session 会启动运行时的页面局部前端 Session Intent；真实 Workspace 的「+」会启动一项以该 Workspace 为目标的 Intent。Workspace 标题栏的「+」打开 ui-workspace 的共享选择器，选择结果同样以一个前端会话为目标。Workspace Intent 不会出现在侧边栏中。
+New Session 会启动运行时的页面局部前端 Session Intent。运行时优先使用作用域操作明确指定的 Workspace，否则使用当前 Session 所属 Workspace，再否则使用最近活跃 Workspace；一个 Workspace 都没有时则清空选择，进入空白 New Session 页面。Workspace 专属控件与共享选择器由 ui-workspace 持有。
 
-`SidebarRootComponentProps` 组合布局 owner share、全局 `useSessions` 和 `useWorkspaces` 钩子、已声明的 `sidebar.workspace` 与 `sidebar.settings` 子 slot，以及注入的 `startSession`、`open` 和侧边栏切换回调。这里没有插件 store：`deriveGroups` 消费对象层快照与组件局部的展开／搜索状态。
+`SidebarRootComponentProps` 组合布局 owner share、全局 `useSessions` 和 `useWorkspaces` 钩子、已声明的 `sidebar.workspaces` 与 `sidebar.settings` 子 slot，以及注入的 `startSession` 与侧边栏切换回调。这里没有插件 store。
 
 栏内的滚动条是一种指针可供性：只要指针不在栏内，外壳就把 ui-theme 的[滚动条间接层](../ui-theme/README.md)重新绑定为 `transparent`；指针离开后滑块再保留 2 秒，因此没人指向的列表不会带着滚动条。避免行位移的空间预留属于滚动区域本身（[ui-workspace](../ui-workspace/README.md)），所以显示滑块不会引起重排。
 
@@ -25,5 +25,5 @@ New Session 会启动运行时的页面局部前端 Session Intent；真实 Work
 ## 已知限制与暂缓事项
 
 - **Session 状态点渲染由 [ui-workspace](../ui-workspace/README.md) 持有**：没有可用的 done/error 通知数据源。
-- **分组只支持 Workspace**：Update 和 Status 不是可用策略。
+- **Workspace 浏览行为由组合持有**：分组、排序、搜索与行状态都属于 [ui-workspace](../ui-workspace/README.md)，不属于此外壳。
 - **「New task completed」未读标记是本地查看状态**：完成时间 > 上次查看时间这一事实永远不会到达宿主。