Merge branch 'master' of https://github.com/deepseek-harness/deepseek-harness into xtr/react-loop-simplification

# Conflicts:
#	.agents/notes/implemented/feature/2026-07-17-dedicated-full-screen-tui-front-door.i18n.yaml
#	docs/architecture.i18n.yaml
#	docs/cookbook/extension-cookbook.i18n.yaml
#	docs/cordis-catalog/events.md
#	docs/cordis-catalog/services.md
#	docs/core-data-structures/core.i18n.yaml
#	docs/core-data-structures/core.md
#	docs/core-data-structures/core.zh.md
#	docs/core-data-structures/llm-streaming.i18n.yaml
#	docs/core-data-structures/llm-streaming.md
#	docs/core-data-structures/llm-streaming.zh.md
#	docs/core-data-structures/session.i18n.yaml
#	docs/event-producer-consumer.md
#	docs/persistence-catalog.md
#	packages/cordis/tool-cordis/src/api-catalog.ts
#	packages/core/agent-loop/README.i18n.yaml
#	packages/core/agent-loop/src/agent.ts
#	packages/core/agent/README.i18n.yaml
#	packages/core/session/README.i18n.yaml
#	packages/core/session/src/types.ts
#	packages/llm/llm/README.i18n.yaml
#	packages/llm/llm/README.md
#	packages/llm/llm/README.zh.md
#	packages/llm/llm/src/index.ts
#	packages/llm/llm/tests/service.spec.ts
#	packages/sdk/sdk-client/README.i18n.yaml
#	packages/sdk/sdk-protocol/README.i18n.yaml
#	packages/sdk/sdk-protocol/README.md
#	packages/sdk/sdk-protocol/README.zh.md
#	packages/subagent/subagent-dsh-sdk/README.i18n.yaml
#	packages/ui/jsonrpc/README.i18n.yaml
#	packages/ui/jsonrpc/README.md
#	packages/ui/jsonrpc/README.zh.md
#	packages/ui/tui/src/index.ts
#	python/sdk/README.i18n.yaml
#	scripts/gen-cordis-catalog.ts

packages/client/AGENTS.md

@@ -86,7 +86,7 @@ If `test:gui` is red on code you did not touch, neither silently fix nor ignore
 Bringing up a new `packages/client/<name>` plugin package (ui-workspace is the latest walked example; ui-sidebar/ui-question are good skeletons to copy):
 
 1. **Package skeleton**: `package.json` (`@deepseek-ai/dsh-client-<name>`, exports `.`/`./invariant`/`./client`/`./src/*`/`./package.json`, `dshClient` manifest, `files` list), `tsconfig.json` (extends `tsconfig.base.client.json`, one `references` entry per workspace dependency plus `support/invariants`), `tsdown.config.ts` (`clientBundle(id, ['lib/types/index.js', 'lib/types/invariant.js'])`), `src/index.ts` (empty node-half apply), `src/invariant.ts` (companion with a real reason), `src/css-modules.d.ts` when using CSS Modules, `README.md` with the Model Experience section.
-2. **Three registration surfaces, all required** (missing any one fails at a different, later point): the `tsconfig.client.json` aggregate `references` entry; a `dshClient` row in `apps/cli/cordis.yml`; an `apps/cli/package.json` dependency (Loader resolves each config-tree package against the composing app's URL — a row whose package is not an `apps/cli` dependency fails to import). `pnpm-workspace.yaml` already globs `packages/*/*`.
+2. **Three registration surfaces, all required** (missing any one fails at a different, later point): the `tsconfig.client.json` aggregate `references` entry; a `dshClient` row in `apps/cli/config/web.cordis.yml`; an `apps/cli/package.json` dependency (Loader resolves each config-tree package against the composing app's URL — a row whose package is not an `apps/cli` dependency fails to import). `pnpm-workspace.yaml` already globs `packages/*/*`.
 3. **dshClient manifest semantics**: `platform: 'web'` always; `immediately: true` only for stage-one-prefetch infrastructure rows. `inject` lists package-name dependency edges — they are **informational only** (preflight display, HMR diffing); they do not sequence entry activation or apply order. Activation order is cordis fiber inject waiting on *services*, nothing else.
 4. **Registering into another package's slot**: if the declaring host provides no waitable service, your apply's order relative to the host's is unconstrained — a bare `slots.register` into its slot races boot (intermittent `slot "..." is not declared` page failures). Register with declaration-aware deferral: check `ctx.slots.spec(name)`, otherwise `ctx.slots.subscribe(name)` and register on the declaration event (SlotCore supports subscribing ahead of declaration); make the registration idempotent, and unsubscribe + dispose in the effect disposer. Only take a service edge in `inject` when the host actually provides one (ui-question → `'conversation'` is that case).
 5. Rebuild the bundle (`pnpm --filter <pkg> bundle`) before probing a live `dsh web` server — the registry serves `lib/client.js`, not sources.

packages/client/connection/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/connection/README.md
-README.md: 173a9b9998e17d201b2d31d73ea74a94b319dae6
-README.zh.md: ca5da643db443956c25399f07c8b460900942ad4
+README.md: d2fda9f15125915594259e01e5b153609ceb21bb
+README.zh.md: 669ae760693b4d98ee873ee5fe323554f58e7ca5

packages/client/connection/README.md

@@ -2,7 +2,7 @@
 
 English | [中文](README.zh.md)
 
-Wire consumer layer: the client plugin's apply mounts `ctx.connection` (shared api client + single-consumer stream-loop starter); the export face carries the wire contract types, the `AbstractApiClient` seam, and the loop's sink/config types. The platform subclasses (WebApiClient/FixtureApiClient), the ConnectionController loop, and the fixture data source are package-internal — apply selects and drives them; tests reach them via src. Contract: api-contracts v3 §3.
+Wire consumer layer: the client plugin's apply mounts `ctx.connection` (shared api client + single-consumer stream-loop starter); the export face carries the wire contract types, the `AbstractApiClient` seam, and the loop's sink/config types. The node half's `/api` route pins the privileged method set (`host.pickDirectory`, `host.openPath`, and the whole configuration plane — `settings.describe`/`update`/`replace`/`mutate` and `credentials.describe`/`set`/`unset`, reads included, since describing returns the exposed configuration and probing an arbitrary reference reports where a credential comes from) to loopback by passing the trust fence with an empty trust list — a declared `trustedHosts` authority reaches every other method, while these stay loopback-local until a real authentication layer exists. The platform subclasses (WebApiClient/FixtureApiClient), the ConnectionController loop, and the fixture data source are package-internal — apply selects and drives them; tests reach them via src. Contract: api-contracts v3 §3.
 
 ## /api browser-trust fence
 

packages/client/connection/README.zh.md

@@ -2,7 +2,7 @@
 
 [English](README.md) | 中文
 
-协议消费层：客户端插件的 apply 会挂载 `ctx.connection`（共享 API 客户端 + 单消费方流循环启动器）；导出表层携带协议契约类型、`AbstractApiClient` seam，以及循环的 sink／配置类型。平台子类（WebApiClient/FixtureApiClient）、ConnectionController 循环和 fixture 数据源都属于包内部：apply 负责选择并驱动它们，测试则通过 src 访问。契约：api-contracts v3 §3。
+协议消费层：客户端插件的 apply 会挂载 `ctx.connection`（共享 API 客户端 + 单消费方流循环启动器）；导出表层携带协议契约类型、`AbstractApiClient` seam，以及循环的 sink／配置类型。node 半侧的 `/api` 路由让特权方法集（`host.pickDirectory`、`host.openPath`，以及整个配置面——`settings.describe`/`update`/`replace`/`mutate` 与 `credentials.describe`/`set`/`unset`，读取也在内，因为 describe 会返回已暴露的配置，而探测任意引用会报出某条凭据来自何处）以空信任表过信任 fence，从而钉在回环——已声明的 `trustedHosts` 授权可达其余全部方法，而这些方法在真正的认证层出现之前仍只限回环本机。平台子类（WebApiClient/FixtureApiClient）、ConnectionController 循环和 fixture 数据源都属于包内部：apply 负责选择并驱动它们，测试则通过 src 访问。契约：api-contracts v3 §3。
 
 ## /api 浏览器信任栅栏
 

packages/client/connection/src/client/api.ts

@@ -14,6 +14,8 @@ export type {
   ModelCatalogFailure, ModelCatalogModel, ModelProviderGroup, ModelReasoning,
   ModelReasoningEffort, ModelTarget, QueueAction, SessionModels,
   GoalsApi, GoalRef,
+  SettingsApi, SettingsNamespaceView, SettingsPathOpView, SettingsSecretView,
+  CredentialsApi, CredentialView, ConfigurableProviderView, LlmApi,
 } from '@deepseek-ai/dsh-host-apiproxy/api'
 export type { ToolCallView, ToolResultView } from '@deepseek-ai/dsh-tools/presentation'
 export type {

packages/client/connection/src/client/fixture.ts

@@ -28,7 +28,7 @@ import type {
 import type { CommandId } from '@deepseek-ai/dsh-commands/brand'
 import type {
   ApiProxy, ClientRequest, ClientResponse, HistoryEntry, HostFrame, MuxFrame, RpcReceipt,
-  ModelTarget, RpcRequest, RpcResponse, RpcResult, ServerRequest, ServerResponse, SessionSummary,
+  ModelProviderGroup, ModelTarget, RpcRequest, RpcResponse, RpcResult, ServerRequest, ServerResponse, SessionSummary,
   ToolCallView, ToolEventView, ToolResultView, WorkspaceId, WorkspaceView,
 } from './api.ts'
 import type { RequestPayload, ResponseValue, RpcMethodMap } from '@deepseek-ai/dsh-host-apiproxy/api'
@@ -155,6 +155,35 @@ const OPENAI_REASONING = {
   defaultEffort: 'medium',
 }
 
+/** Catalog served by `session.models` and `llm.models` alike (fresh copies per call). */
+function fixtureModelGroups(): ModelProviderGroup[] {
+  return [
+    {
+      id: 'deepseek-official',
+      name: 'DeepSeek',
+      models: [
+        {
+          id: 'deepseek-v4-flash',
+          name: 'DeepSeek-V4-Flash',
+          description: '快速响应',
+          reasoning: DEEPSEEK_REASONING,
+        },
+        {
+          id: 'deepseek-v4-pro',
+          name: 'DeepSeek-V4-Pro',
+          description: '复杂任务',
+          reasoning: DEEPSEEK_REASONING,
+        },
+      ],
+    },
+    {
+      id: 'openai',
+      name: 'OpenAI',
+      models: [{ id: 'gpt-5', name: 'GPT-5', reasoning: OPENAI_REASONING }],
+    },
+  ]
+}
+
 function sid(id: string): SessionId {
   return id as SessionId
 }
@@ -684,8 +713,14 @@ export function createFixtureApi(options: FixtureOptions = {}): ApiProxy {
   const logs = new Map<SessionId, SessionEvent[]>([[sid('fx-alpha'), buildAlphaLog()]])
   const modelTargets = new Map<SessionId, ModelTarget>(sessions.map(session => [
     session.sessionId,
-    { provider: 'deepseek', model: 'deepseek-v4-flash' },
+    { provider: 'deepseek-official', model: 'deepseek-v4-flash' },
   ]))
+  /** Credential store double: set/unset flip the describe badge, values never read back. */
+  const fixtureCredentials = new Map<string, true>([
+    // The assembled fixture represents an already-configured shipped
+    // DeepSeek route so unrelated GUI journeys do not enter first-run setup.
+    ['DEEPSEEK_API_KEY', true],
+  ])
   const nextTurn = new Map<SessionId, number>([[sid('fx-alpha'), 60]])
   let nextSession = 1
   let nextRpc = 1
@@ -1001,7 +1036,7 @@ export function createFixtureApi(options: FixtureOptions = {}): ApiProxy {
           sessionId: requestedId ?? sid(`fx-${nextSession++}`), updatedAt: Date.now(), running: false, blank: true, cwd,
         }
         sessions.push(created)
-        modelTargets.set(created.sessionId, { provider: 'deepseek', model: 'deepseek-v4-flash' })
+        modelTargets.set(created.sessionId, { provider: 'deepseek-official', model: 'deepseek-v4-flash' })
         attachedSessions += 1
         const emitSession = (): void => {
           // Mirrors the host: the frame fires at creation, so blank is constantly true.
@@ -1042,6 +1077,56 @@ export function createFixtureApi(options: FixtureOptions = {}): ApiProxy {
         const appended = logOf(sessionId).at(-1) as SessionEvent
         return ok(request, { title: normalized, seq: appended.seq })
       },
+      fork: (request) => {
+        const { sessionId, atSeq } = request.payload
+        const source = summaryOf(sessionId)
+        if (source === undefined) {
+          return err(request, {
+            code: 'session-not-found',
+            message: `no session ${sessionId}`,
+            details: { sessionId },
+          })
+        }
+        const log = logs.get(sessionId) ?? []
+        const lastSeq = log.at(-1)?.seq ?? -1
+        const anchoredBoundary = atSeq === undefined
+          ? undefined
+          : log.find(e => e.type === 'turn/end' && e.seq >= atSeq)
+        const boundary = anchoredBoundary
+          ?? (atSeq === undefined || atSeq > lastSeq
+            ? log.findLast(e => e.type === 'turn/end')
+            : undefined)
+        if (boundary === undefined) {
+          return err(request, {
+            code: 'fork-unavailable',
+            message: atSeq !== undefined && atSeq <= lastSeq
+              ? `session ${sessionId} has not completed the turn containing event ${String(atSeq)}`
+              : `session ${sessionId} has no completed turn`,
+            details: { sessionId },
+          })
+        }
+        let cut = boundary.seq + 1
+        while (cut < log.length && log[cut]?.type !== 'turn/start') cut++
+        const child: SessionSummary = {
+          sessionId: sid(`fx-${nextSession++}`), updatedAt: Date.now(), running: false, blank: false,
+          parentSessionId: sessionId,
+          ...source.cwd === undefined ? {} : { cwd: source.cwd },
+        }
+        logs.set(child.sessionId, log.slice(0, cut))
+        sessions.push(child)
+        emitHost({
+          type: 'host/session-added', sessionId: child.sessionId, blank: false,
+          parentSessionId: sessionId,
+          ...source.cwd === undefined ? {} : { cwd: source.cwd },
+        })
+        const workspace = workspaces.find(w => w.sessionIds.includes(sessionId))
+        if (workspace !== undefined) {
+          workspace.sessionIds = [child.sessionId, ...workspace.sessionIds]
+          workspace.updatedAt = new Date().toISOString()
+          emitHost({ type: 'host/workspace-changed', workspace: { ...workspace } })
+        }
+        return ok(request, { sessionId: child.sessionId })
+      },
       history: async (request) => {
         const log = logs.get(request.payload.sessionId) ?? []
         // Snapshot at request time, deliver after the transit delay (mirrors a real host under latency).
@@ -1061,32 +1146,8 @@ export function createFixtureApi(options: FixtureOptions = {}): ApiProxy {
       },
       models: request => ok(request, {
         current: modelTargets.get(request.payload.sessionId)
-          ?? { provider: 'deepseek', model: 'deepseek-v4-flash' },
-        groups: [
-          {
-            id: 'deepseek',
-            name: 'DeepSeek',
-            models: [
-              {
-                id: 'deepseek-v4-flash',
-                name: 'DeepSeek-V4-Flash',
-                description: '快速响应',
-                reasoning: DEEPSEEK_REASONING,
-              },
-              {
-                id: 'deepseek-v4-pro',
-                name: 'DeepSeek-V4-Pro',
-                description: '复杂任务',
-                reasoning: DEEPSEEK_REASONING,
-              },
-            ],
-          },
-          {
-            id: 'openai',
-            name: 'OpenAI',
-            models: [{ id: 'gpt-5', name: 'GPT-5', reasoning: OPENAI_REASONING }],
-          },
-        ],
+          ?? { provider: 'deepseek-official', model: 'deepseek-v4-flash' },
+        groups: fixtureModelGroups(),
         failures: [],
       }),
       selectModel: (request) => {
@@ -1331,14 +1392,14 @@ export function createFixtureApi(options: FixtureOptions = {}): ApiProxy {
           const spec = PERMISSION_PRESETS[preset]
           if (preset === '') {
             const current = permissionSelectOf(logOf(id)).currentValue
-            append(id, { type: 'command/done', data: { commandId, kind: 'success', text: `Current permission preset: ${current}. Available: ${Object.keys(PERMISSION_PRESETS).join(', ')}.` } })
+            append(id, { type: 'command/done', data: { commandId, kind: 'success', text: `current preset ${current} (available: ${Object.keys(PERMISSION_PRESETS).join(', ')})` } })
           } else if (spec === undefined) {
-            append(id, { type: 'command/done', data: { commandId, kind: 'error', text: `unknown permission preset ${JSON.stringify(preset)} (available: ${Object.keys(PERMISSION_PRESETS).join(', ')})` } })
+            append(id, { type: 'command/done', data: { commandId, kind: 'error', text: `unknown preset "${preset}" (available: ${Object.keys(PERMISSION_PRESETS).join(', ')})` } })
           } else {
             if (permissionSelectOf(logOf(id)).currentValue !== preset) append(id, { type: 'permission/preset', data: { preset } })
             append(id, { type: 'sandbox/mode', data: { mode: spec.sandbox } })
             append(id, { type: 'approval/policy', data: { policy: spec.approval } })
-            append(id, { type: 'command/done', data: { commandId, kind: 'success', text: `Permission preset: ${preset}.` } })
+            append(id, { type: 'command/done', data: { commandId, kind: 'success', text: `preset ${preset}` } })
           }
           return ok(request, { matched: true as const, commandId })
         }
@@ -1522,6 +1583,64 @@ export function createFixtureApi(options: FixtureOptions = {}): ApiProxy {
         }
       },
     },
+    settings: {
+      // Only the resolved DeepSeek address needed by first-run readiness is
+      // represented here. Fixture-backed journeys do not open its Models
+      // editor; real schema-driven forms ride the HTTP transport.
+      describe: request => ok(request, {
+        writable: true,
+        namespaces: [{
+          ns: 'llm-deepseek',
+          schema: {},
+          value: { apiKeyEnv: 'DEEPSEEK_API_KEY' },
+          applies: 'live',
+          secrets: [{ path: ['apiKey'], set: false }],
+          revision: 0,
+        }],
+      }),
+      update: request => err(request, {
+        code: 'settings-rejected',
+        message: 'fixture: the minimal readiness settings descriptor is read-only',
+        details: { ns: request.payload.ns },
+      }),
+      replace: request => err(request, {
+        code: 'settings-rejected',
+        message: 'fixture: the minimal readiness settings descriptor is read-only',
+        details: { ns: request.payload.ns },
+      }),
+      mutate: request => err(request, {
+        code: 'settings-rejected',
+        message: 'fixture: no settings namespaces are registered',
+        details: { ns: request.payload.ns },
+      }),
+    },
+    credentials: {
+      describe: request => ok(request, {
+        credentials: Object.fromEntries(request.payload.refs.map(ref => [ref, {
+          configured: fixtureCredentials.has(ref),
+          ...fixtureCredentials.has(ref) ? { source: 'file' } : {},
+          writable: true,
+        }])),
+      }),
+      set: (request) => {
+        fixtureCredentials.set(request.payload.ref, true)
+        return ok(request, {})
+      },
+      unset: (request) => {
+        fixtureCredentials.delete(request.payload.ref)
+        return ok(request, {})
+      },
+    },
+    llm: {
+      providers: request => ok(request, {
+        providers: [
+          { provider: 'deepseek-official', displayName: 'DeepSeek', settingsNs: 'llm-deepseek', settingsPath: [], active: true },
+          { provider: 'openai', displayName: 'openai', settingsNs: 'llm-pi-ai', settingsPath: ['providers', 'openai'], active: true },
+          { provider: 'anthropic', displayName: 'anthropic', settingsNs: 'llm-pi-ai', settingsPath: ['providers', 'anthropic'], active: false },
+        ],
+      }),
+      models: request => ok(request, { groups: fixtureModelGroups(), failures: [] }),
+    },
     respond(message: ClientResponse): Promise<RpcReceipt> {
       // Same routing discipline as the host: rpcId first, then the payload's
       // audit correlation; a settled or unknown id is not-pending.
@@ -1591,6 +1710,7 @@ export class FixtureApiClient extends AbstractApiClient {
       case 'session.models': return this.api.sessions.models(request)
       case 'session.selectModel': return this.api.sessions.selectModel(request)
       case 'session.rename': return this.api.sessions.rename(request)
+      case 'session.fork': return this.api.sessions.fork(request)
       case 'session.prompt': return this.api.sessions.prompt(request)
       case 'session.updateQueue': return this.api.sessions.updateQueue(request)
       case 'session.cancel': return this.api.sessions.cancel(request)
@@ -1614,6 +1734,15 @@ export class FixtureApiClient extends AbstractApiClient {
       case 'goal.resume': return this.api.goals.resume(request)
       case 'goal.complete': return this.api.goals.complete(request)
       case 'goal.clear': return this.api.goals.clear(request)
+      case 'settings.describe': return this.api.settings.describe(request)
+      case 'settings.update': return this.api.settings.update(request)
+      case 'settings.replace': return this.api.settings.replace(request)
+      case 'settings.mutate': return this.api.settings.mutate(request)
+      case 'credentials.describe': return this.api.credentials.describe(request)
+      case 'credentials.set': return this.api.credentials.set(request)
+      case 'credentials.unset': return this.api.credentials.unset(request)
+      case 'llm.providers': return this.api.llm.providers(request)
+      case 'llm.models': return this.api.llm.models(request)
     }
   }
 

packages/client/connection/src/client/index.ts

@@ -22,6 +22,8 @@ export type {
   ClientRequest, ServerResponse, ServerRequest, ClientResponse, RpcMessage, RpcReceipt,
   IApiClient, SessionId, SessionEvent, ContentBlock, StreamChunk,
   GoalsApi, GoalRef,
+  SettingsApi, SettingsNamespaceView, SettingsPathOpView, SettingsSecretView,
+  CredentialsApi, CredentialView, ConfigurableProviderView, LlmApi,
 } from './api.ts'
 export { RpcId, AbstractApiClient, transportError } from './api.ts'
 

packages/client/connection/src/index.ts

@@ -33,10 +33,38 @@ export const Config: z<ConnectionConfig> = z.object({
   trustedHosts: z.array(String).default([]),
 })
 
+/**
+ * Methods gated to loopback even on a trusted-host deployment. Native dialogs
+ * act on the host machine; the settings and credential domains mutate the
+ * user's configuration and secret store, and READING them is equally
+ * privileged — `settings.describe` returns every exposed namespace's
+ * configuration and `credentials.describe` reports whether an arbitrary
+ * environment-variable name is configured and where from, which is
+ * reconnaissance no anonymous caller should have. `trustedHosts` is a
+ * DNS-rebinding fence, explicitly not authentication, so the whole
+ * configuration plane stays loopback-same-origin until a real authentication
+ * layer exists. The model catalog (`llm.providers`, `llm.models`) is
+ * deliberately NOT here: it carries provider ids, display names, and model
+ * lists — no endpoints, keys, or key state — and a LAN client's model picker
+ * legitimately needs it.
+ */
+const PRIVILEGED_METHODS = new Set([
+  'host.pickDirectory',
+  'host.openPath',
+  'settings.describe',
+  'settings.update',
+  'settings.replace',
+  'credentials.describe',
+  'credentials.set',
+  'credentials.unset',
+])
+
 /**
  * Mounts the API gateway under the browser transport prefix. Every request on
  * the prefix passes the browser-trust fence first (DNS-rebinding and
- * cross-site defense — [api-request-trust](./api-request-trust.ts)).
+ * cross-site defense — [api-request-trust](./api-request-trust.ts));
+ * privileged methods additionally pass it with an empty trust list, which
+ * pins them to loopback.
  * @param ctx - Host plugin context.
  * @param config - resolved plugin config (schema defaults applied).
  */
@@ -51,7 +79,14 @@ export function apply(ctx: Context, config?: ConnectionConfig): void {
     kind: 'prefix',
     path: API_PATH,
     handler: async (req, res) => {
-      if (!isTrustedApiRequest(req, trustedHosts)) {
+      const pathname = new URL(req.url ?? '/', 'http://dsh.internal').pathname
+      const method = pathname.startsWith(`${API_PATH}/`)
+        ? pathname.slice(API_PATH.length + 1)
+        : undefined
+      const allowed = method !== undefined && PRIVILEGED_METHODS.has(method)
+        ? isTrustedApiRequest(req, [])
+        : isTrustedApiRequest(req, trustedHosts)
+      if (!allowed) {
         res.writeHead(403)
         res.end('forbidden')
         return

packages/client/connection/tests/fake-api.ts

@@ -46,16 +46,17 @@ export class FakeApiClient implements IApiClient {
   onList: (payload: unknown) => Promise<RpcResponse<{ items: never[] }>> = () => Promise.resolve(ok({ items: [] }))
   onCreate: (payload: unknown) => Promise<RpcResponse<{ sessionId: SessionId }>> = () => Promise.resolve(ok({ sessionId: 'fk-new' as SessionId }))
   onRename: (payload: unknown) => Promise<RpcResponse<{ title: string; seq: number }>> = () => Promise.resolve(ok({ title: 'fk-renamed', seq: 0 }))
+  onFork: (payload: unknown) => Promise<RpcResponse<{ sessionId: SessionId }>> = () => Promise.resolve(ok({ sessionId: 'fk-fork' as SessionId }))
   onHistory: (payload: { sessionId: SessionId; beforeSeq?: number; maxMessages?: number })
   => Promise<RpcResponse<{ events: never[]; hasMore: boolean; modelTarget: ModelTarget }>> =
     () => Promise.resolve(ok({
       events: [],
       hasMore: false,
-      modelTarget: { provider: 'deepseek', model: 'deepseek-chat' },
+      modelTarget: { provider: 'deepseek-official', model: 'deepseek-chat' },
     }))
 
   onModels: (payload: unknown) => Promise<RpcResponse<SessionModels>> = () => Promise.resolve(ok({
-    current: { provider: 'deepseek', model: 'deepseek-chat' },
+    current: { provider: 'deepseek-official', model: 'deepseek-chat' },
     groups: [],
     failures: [],
   }))
@@ -99,6 +100,7 @@ export class FakeApiClient implements IApiClient {
     selectModel: (payload: ModelTarget & { sessionId: SessionId }) =>
       this.record('session.selectModel', payload, this.onSelectModel(payload)),
     rename: (payload: unknown) => this.record('session.rename', payload, this.onRename(payload)),
+    fork: (payload: unknown) => this.record('session.fork', payload, this.onFork(payload)),
     prompt: (payload: unknown) => this.record('session.prompt', payload, this.onPrompt(payload)),
     updateQueue: (payload: unknown) => this.record('session.updateQueue', payload, this.onUpdateQueue(payload)),
     cancel: (payload: unknown) => this.record('session.cancel', payload, this.onCancel(payload)),
@@ -154,6 +156,24 @@ export class FakeApiClient implements IApiClient {
     clear: payload => this.record('goal.clear', payload, Promise.resolve(ok({ cleared: true as const }))),
   }
 
+  readonly settings: IApiClient['settings'] = {
+    describe: payload => this.record('settings.describe', payload, Promise.resolve(ok({ writable: true, namespaces: [] }))),
+    update: payload => this.record('settings.update', payload, Promise.resolve(ok({ ns: 'fake', schema: {}, value: {}, applies: 'live' as const, secrets: [], revision: 0 }))),
+    replace: payload => this.record('settings.replace', payload, Promise.resolve(ok({ ns: 'fake', schema: {}, value: {}, applies: 'live' as const, secrets: [], revision: 0 }))),
+    mutate: payload => this.record('settings.mutate', payload, Promise.resolve(ok({ ns: 'fake', schema: {}, value: {}, applies: 'live' as const, secrets: [], revision: 0 }))),
+  }
+
+  readonly credentials: IApiClient['credentials'] = {
+    describe: payload => this.record('credentials.describe', payload, Promise.resolve(ok({ credentials: {} }))),
+    set: payload => this.record('credentials.set', payload, Promise.resolve(ok({}))),
+    unset: payload => this.record('credentials.unset', payload, Promise.resolve(ok({}))),
+  }
+
+  readonly llm: IApiClient['llm'] = {
+    providers: payload => this.record('llm.providers', payload, Promise.resolve(ok({ providers: [] }))),
+    models: payload => this.record('llm.models', payload, Promise.resolve(ok({ groups: [], failures: [] }))),
+  }
+
   /** When true, streams never fire onOpen (misbehaving-carrier material for the handshake timeout guard). */
   suppressStreamOpen = false
 

packages/client/connection/tests/fixture.spec.ts

@@ -119,6 +119,36 @@ describe('createFixtureApi', () => {
     expect(JSON.stringify(after.result.value.events)).toContain('openai/gpt-5')
   })
 
+  it('serves configured DeepSeek readiness and keeps credential values write-only', async () => {
+    const api = createFixtureApi()
+    const settings = await api.settings.describe(req({}))
+    if (!settings.result.ok) throw new Error('settings describe failed')
+    expect(settings.result.value.namespaces).toMatchObject([{
+      ns: 'llm-deepseek',
+      value: { apiKeyEnv: 'DEEPSEEK_API_KEY' },
+      secrets: [{ path: ['apiKey'], set: false }],
+    }])
+
+    const initial = await api.credentials.describe(req({ refs: ['DEEPSEEK_API_KEY', 'TEST_API_KEY'] }))
+    if (!initial.result.ok) throw new Error('credential describe failed')
+    expect(initial.result.value.credentials).toEqual({
+      DEEPSEEK_API_KEY: { configured: true, source: 'file', writable: true },
+      TEST_API_KEY: { configured: false, writable: true },
+    })
+    await api.credentials.set(req({ ref: 'TEST_API_KEY', value: 'write-only-fixture-secret' }))
+    const configured = await api.credentials.describe(req({ refs: ['TEST_API_KEY'] }))
+    if (!configured.result.ok) throw new Error('credential describe failed')
+    expect(configured.result.value.credentials.TEST_API_KEY).toEqual({
+      configured: true,
+      source: 'file',
+      writable: true,
+    })
+    await api.credentials.unset(req({ ref: 'TEST_API_KEY' }))
+    const cleared = await api.credentials.describe(req({ refs: ['TEST_API_KEY'] }))
+    if (!cleared.result.ok) throw new Error('credential describe failed')
+    expect(cleared.result.value.credentials.TEST_API_KEY).toEqual({ configured: false, writable: true })
+  })
+
   it('emits the todo/write snapshot at the real tool boundary: between tool/call and tool/result, timestamps monotonic', async () => {
     const api = createFixtureApi()
     const tail = await api.sessions.history(req({ sessionId: sid('fx-alpha'), maxMessages: 10 }))

packages/client/connection/tests/node-half.spec.ts

@@ -1,8 +1,10 @@
 /** Node half: registers the /api prefix route bridging to the api gateway. */
 import { EventEmitter } from 'node:events'
+import { createServer, request as httpRequest } from 'node:http'
 import { Readable } from 'node:stream'
 import { Context } from 'cordis'
 import { describe, expect, it } from 'vitest'
+import type { AddressInfo } from 'node:net'
 import type { IncomingMessage, ServerResponse } from 'node:http'
 import type { ApiProxy } from '@deepseek-ai/dsh-host-apiproxy/api'
 import type { HttpServerService, WebRoute } from '@deepseek-ai/dsh-host-webserver'
@@ -21,9 +23,9 @@ function fakeHttpServer(routes: WebRoute[]): Pick<HttpServerService, 'register'
 }
 
 /** Bodyless GET carrying the given headers (enough for the trust fence + bridge). */
-function fakeRequest(headers: Record<string, string>): IncomingMessage {
+function fakeRequest(headers: Record<string, string>, url = `${API_PATH}/session.list`): IncomingMessage {
   const request = Readable.from([]) as unknown as IncomingMessage
-  Object.assign(request, { url: `${API_PATH}/session.list`, method: 'GET', headers })
+  Object.assign(request, { url, method: 'GET', headers })
   return request
 }
 
@@ -97,6 +99,31 @@ describe('connection node half', () => {
     await dispose()
   })
 
+  it('pins privileged methods to loopback even for a declared trusted authority', async () => {
+    const { routes, dispose } = await mounted({ trustedHosts: ['harness.example'] })
+    // The privileged set: native dialogs plus the whole settings/credential
+    // configuration plane, reads included. The same declared authority reaches
+    // ordinary reads (carrier-level 404 from the empty proxy proves the fence
+    // passed), but each privileged method stays loopback-only and 403s.
+    for (const method of [
+      'host.pickDirectory', 'host.openPath',
+      'settings.describe', 'settings.update', 'settings.replace',
+      'credentials.describe', 'credentials.set', 'credentials.unset',
+    ]) {
+      const denied = fakeResponse()
+      await routes[0]!.handler(
+        fakeRequest({ host: 'harness.example' }, `${API_PATH}/${method}`),
+        denied.response,
+      )
+      expect(denied.state.status).toBe(403)
+      expect(denied.state.body).toBe('forbidden')
+    }
+    const read = fakeResponse()
+    await routes[0]!.handler(fakeRequest({ host: 'harness.example' }), read.response)
+    expect(read.state.status).not.toBe(403)
+    await dispose()
+  })
+
   it('passes loopback and declared-authority requests through to the bridge', async () => {
     const { routes, dispose } = await mounted({ trustedHosts: ['harness.example:3080', '192.168.1.5'] })
     // Loopback, no browser markers (curl shape): the fence passes; the carrier
@@ -118,3 +145,69 @@ describe('connection node half', () => {
     await dispose()
   })
 })
+
+describe('connection node half over a real HTTP server', () => {
+  /** Serve the registered prefix route from a real server and return its port. */
+  async function serve(routes: WebRoute[]): Promise<{ port: number; close: () => Promise<void> }> {
+    const server = createServer((request, response) => {
+      void routes[0]!.handler(request, response)
+    })
+    await new Promise<void>(resolve => server.listen(0, '127.0.0.1', resolve))
+    const address = server.address() as AddressInfo
+    return {
+      port: address.port,
+      close: () => new Promise<void>((resolve, reject) => {
+        server.close((error) => {
+          if (error === undefined || error === null) resolve()
+          else reject(error)
+        })
+      }),
+    }
+  }
+
+  /** One real request; `host` spoofs the authority the way a LAN client's browser would send it. */
+  function call(port: number, method: string, host: string): Promise<number> {
+    return new Promise((resolve, reject) => {
+      const request = httpRequest(
+        { host: '127.0.0.1', port, path: `${API_PATH}/${method}`, method: 'GET', headers: { host } },
+        (response) => {
+          response.resume()
+          response.on('end', () => { resolve(response.statusCode ?? 0) })
+        },
+      )
+      request.on('error', reject)
+      request.end()
+    })
+  }
+
+  it('answers a declared LAN authority with 403 on every configuration method, over real HTTP', async () => {
+    // The fence's input is a real IncomingMessage parsed by Node from the
+    // wire, not a hand-assembled object: the Host header a LAN browser sends
+    // is exactly what decides loopback-only here, so the boundary is asserted
+    // against the parse the server actually performs.
+    const { routes, dispose } = await mounted({ trustedHosts: ['harness.example'] })
+    const { port, close } = await serve(routes)
+    try {
+      // Reads are as privileged as writes: describe returns the exposed
+      // configuration, and credentials.describe probes arbitrary env-var names.
+      for (const method of [
+        'settings.describe', 'settings.update', 'settings.replace',
+        'credentials.describe', 'credentials.set', 'credentials.unset',
+        'host.pickDirectory', 'host.openPath',
+      ]) {
+        expect([method, await call(port, method, 'harness.example')]).toEqual([method, 403])
+      }
+      // The model catalog stays reachable for the same authority: a LAN
+      // client's model picker needs it, and it carries no key or endpoint
+      // state (404 is the empty proxy's carrier answer — the fence passed).
+      for (const method of ['llm.providers', 'llm.models']) {
+        expect([method, await call(port, method, 'harness.example')]).toEqual([method, 404])
+      }
+      // Loopback reaches everything, configuration included.
+      expect(await call(port, 'settings.describe', `127.0.0.1:${String(port)}`)).toBe(404)
+    } finally {
+      await close()
+      await dispose()
+    }
+  })
+})

packages/client/runtime/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/runtime/README.md
-README.md: 766d8516225cd46cb1a3a80c832d1cf55e816140
-README.zh.md: 9b514afca91f604b3e895187de3b5532bf22a692
+README.md: a116a5e4ad3070f20e6d90490f2507c1e2369c37
+README.zh.md: f375811e6f1480d6636fe4eb77746b76d6414b1e

packages/client/runtime/README.md

@@ -2,7 +2,7 @@
 
 English | [中文](README.zh.md)
 
-Client cordis boot and React-free object services: SlotsService wraps SlotCore and supplies renderer data sources; SessionsService owns Session objects and the Chat-facing list, scope, and event-window state; SessionHistoryService lazily owns independent raw-history ledgers for inspection consumers; WorkspacesService depends on SessionsService and owns Workspace objects, list/actions, default-target derivation, and the New Session blank-reuse entry (`connectWorkspace`). The runtime fans the shared Host stream into the Session, Workspace, and activated history owners without routing inspection state through Session or SessionManager. Client sessions are always Host-born (Session+Agent+cwd in one `session.create`); the client holds no pre-entity session state — a session's Agent scope (the client mirror of host dsh-scope, keyed by the shared agent/session id) is born when its row enters the list mirror and dies with the prune. Contract: api-contracts v3 §4. Each `Session` holds a generic `ProjectionValueStore` seeded from the history-tail `projections` block and updated by `session/projection` frames under higher-seq-wins; domain keys (including `todos`) are read via `projections.faceOf` / `useProjection`, not via `ConversationSnapshot`.
+Client cordis boot and React-free object services: SlotsService wraps SlotCore and supplies renderer data sources; SessionsService owns Session objects and the Chat-facing list, scope, and event-window state; SessionHistoryService lazily owns independent raw-history ledgers for inspection consumers; WorkspacesService depends on SessionsService and owns Workspace objects, list/actions, default-target derivation, and the New Session blank-reuse entry (`connectWorkspace`). The runtime fans the shared Host stream into the Session, Workspace, and activated history owners without routing inspection state through Session or SessionManager, and bridges the registry-invalidation frames to typed ctx events (`commands/changed`, `settings/changed`, `credentials/changed`, `models/changed`) so surface caches refetch without touching the stream. Client sessions are always Host-born (Session+Agent+cwd in one `session.create`); the client holds no pre-entity session state — a session's Agent scope (the client mirror of host dsh-scope, keyed by the shared agent/session id) is born when its row enters the list mirror and dies with the prune. Contract: api-contracts v3 §4. Each `Session` holds a generic `ProjectionValueStore` seeded from the history-tail `projections` block and updated by `session/projection` frames under higher-seq-wins; domain keys (including `todos`) are read via `projections.faceOf` / `useProjection`, not via `ConversationSnapshot`.
 
 ## Workspace and Session lists
 
@@ -28,6 +28,10 @@ SlotsService gives the renderer separate bare observables for `useSessions` and
 
 `SessionManager` retains the latest validated `session/title` control snapshot independently of list and session-instance arrival. Newer event seqs replace older snapshots, title timestamps contribute to list recency, and a subscription baseline discards any retained title beyond its `lastSeq` before the optional folded title arrives. Explicit session removal also clears the retained title. The client-facing `SessionSummary.title` is therefore only the actual durable title; `displayTitle` is always present and falls back through the cwd basename and session id. A cold persisted session keeps that fallback until opening or resuming it causes the host to fold and project its log-backed title. `ISession.rename` settles the `title` projection cell directly from the unary response's `{title, seq}` under the same higher-seq-wins rule — the list row and every `useProjection('title')` reader update ahead of the push frame, whose later replay of the same seq is a no-op.
 
+## Session forking
+
+`ISessions.fork({sessionId, atSeq?, increaseTitle?})` resolves only after the child summary is locally addressable, carrying source lineage and cwd with `blank: false`; callers choose whether to open it. With `increaseTitle: true`, the client renames the child from the source session's persisted title: a trailing `(N)` or `（N）` is incremented without changing bracket style, while any other title gets ` (1)` appended; the rename is skipped when the source has no persisted title, and a rename failure rejects the promise but leaves the created child in place. This option is not sent in the Host fork request. A `workspace-attach-failed` response still identifies a child already published by the Host, so `SessionManager` reconciles that partial success before `SessionForkError` reaches the caller instead of making a retry create a duplicate child.
+
 ## Session model selection
 
 Each resident `Session` owns a `modelSelection` snapshot containing the current provider/model target, provider-grouped directory, provider-local failures, and the `idle`/`loading`/`ready`/`selecting`/`error` state. History establishes or refreshes the current target, opening a selector refreshes the directory, and selection failures preserve the last target and usable groups. Directory and selection operations share a monotonically increasing generation so an older response cannot overwrite a newer selection. A reconnect rebuild restores the target reported by the Host without replacing unchanged selection substructure.

packages/client/runtime/README.zh.md

@@ -2,7 +2,7 @@
 
 [English](README.md) | 中文
 
-客户端 cordis 启动与不依赖 React 的对象服务：SlotsService 包装 SlotCore 并提供 renderer 数据源；SessionsService 拥有 Session 对象以及 Chat 所需的列表、scope 和事件窗口状态；SessionHistoryService 为检查类消费方惰性拥有彼此独立的原始历史账本；WorkspacesService 依赖 SessionsService，拥有 Workspace 对象、列表／操作、默认目标派生，以及 New Session 空会话复用入口（`connectWorkspace`）。运行时把共享 Host 流分发给 Session、Workspace 和已激活的历史数据所有者，不让检查状态经过 Session 或 SessionManager。客户端会话一律由 Host 创建（一次 `session.create` 同时产生 Session、agent（智能体）和 cwd）；客户端不持有任何实体化之前的会话状态——agent scope（host dsh-scope 的客户端镜像，以 agent/session 共用 id 为键）在会话行进入列表镜像时创建，并随 prune 销毁。契约：api-contracts v3 §4。每个 `Session` 持有一个通用的 `ProjectionValueStore`，由历史记录尾部的 `projections` 块播种，并经 `session/projection` 帧按 seq 高者胜更新；领域键（含 `todos`）经 `projections.faceOf`／`useProjection` 读取，不经 `ConversationSnapshot`。
+客户端 cordis 启动与不依赖 React 的对象服务：SlotsService 包装 SlotCore 并提供 renderer 数据源；SessionsService 拥有 Session 对象以及 Chat 所需的列表、scope 和事件窗口状态；SessionHistoryService 为检查类消费方惰性拥有彼此独立的原始历史账本；WorkspacesService 依赖 SessionsService，拥有 Workspace 对象、列表／操作、默认目标派生，以及 New Session 空会话复用入口（`connectWorkspace`）。运行时把共享 Host 流分发给 Session、Workspace 和已激活的历史数据所有者，不让检查状态经过 Session 或 SessionManager，并把注册表失效帧桥接为类型化 ctx 事件（`commands/changed`、`settings/changed`、`credentials/changed`、`models/changed`），使各表面缓存无需触碰流即可重拉。客户端会话一律由 Host 创建（一次 `session.create` 同时产生 Session、agent（智能体）和 cwd）；客户端不持有任何实体化之前的会话状态——agent scope（host dsh-scope 的客户端镜像，以 agent/session 共用 id 为键）在会话行进入列表镜像时创建，并随 prune 销毁。契约：api-contracts v3 §4。每个 `Session` 持有一个通用的 `ProjectionValueStore`，由历史记录尾部的 `projections` 块播种，并经 `session/projection` 帧按 seq 高者胜更新；领域键（含 `todos`）经 `projections.faceOf`／`useProjection` 读取，不经 `ConversationSnapshot`。
 
 ## Workspace 与 Session 列表
 
@@ -28,6 +28,10 @@ SlotsService 分别为 renderer 提供 `useSessions` 与 `useWorkspaces` 的裸
 
 `SessionManager` 独立于列表和 Session 实例到达情况，保留最近一次通过验证的 `session/title` 控制快照。seq 更高的事件会替换旧快照，标题时间戳计入列表新近程度；订阅基线会先丢弃 seq 超过其 `lastSeq` 的任何已保留标题，再接收可选的折叠标题。显式移除 Session 也会清除已保留标题。因此，面向客户端的 `SessionSummary.title` 只包含实际的持久化标题；`displayTitle` 始终存在，并依次回退到 cwd basename 和 Session id。冷态持久化会话会保持该回退值，直到打开或恢复会话，促使主机折叠并投影由日志支撑的标题。`ISession.rename` 用 unary 响应中的 `{title, seq}` 直接结算 `title` 投影格，遵循同一 seq 高者胜规则——列表行和所有 `useProjection('title')` 读者在推送帧到达前即更新；推送帧随后重放同一 seq 时为无操作。
 
+## 会话 fork
+
+`ISessions.fork({sessionId, atSeq?, increaseTitle?})` 只在子会话摘要已能在本地寻址后才完成；该摘要携带源会话的谱系和 cwd，且 `blank: false`，由调用方决定是否打开。`increaseTitle: true` 会在 client 端把源会话的持久化标题改名到子会话：尾部 `(N)` 或 `（N）` 递增并保留括号样式，其余标题追加 ` (1)`；源会话没有持久化标题时跳过改名，改名失败时拒绝 promise 但保留已创建的子会话。该选项不会进入 Host fork 请求。即使响应为 `workspace-attach-failed`，其中仍会标识 Host 已发布的子会话，因此 `SessionManager` 会先将这一部分成功对账，再让 `SessionForkError` 到达调用方，避免重试创建重复的子会话。
+
 ## 会话模型选择
 
 每个常驻 `Session` 都拥有一个 `modelSelection` 快照，其中包含当前提供方/模型目标、按提供方分组的目录、逐提供方失败记录，以及 `idle`／`loading`／`ready`／`selecting`／`error` 状态。历史记录会建立或刷新当前目标，打开选择器会刷新目录；选择失败会保留上一个目标和可用分组。目录与选择操作共用单调递增的代次，因此较旧响应无法覆盖较新的选择。重连重建会恢复 Host 报告的目标，同时不替换未变化的选择子结构。

packages/client/runtime/src/client/contract/sessions.ts

@@ -29,6 +29,17 @@ export interface ISessions {
   open(id: SessionId): void
   /** Clear the current selection into the no-session view state. */
   clear(): void
+  /**
+   * Fork a session from a completed-turn prefix of the source; on resolution
+   * the child is in the list store and `open()` can target it.
+   * @param opts - source session id, the optional event seq anchoring the
+   *   cut (the boundary is the first turn/end at or after it; an in-log
+   *   anchor in an open turn is unavailable rather than clipped backward),
+   *   and whether to increment an inherited durable title before resolving.
+   * @returns the child session id.
+   * @throws when the fork fails, or when a requested child-title rename fails after creation.
+   */
+  fork(opts: { sessionId: SessionId; atSeq?: number; increaseTitle?: boolean }): Promise<SessionId>
   /**
    * Register a per-session standard-props provider (hooks become `use<Name>`
    * selector hooks on the render side; props spread verbatim).

packages/client/runtime/src/client/index.ts

@@ -122,6 +122,28 @@ declare module 'cordis' {
      * @mode emit
      */
     'commands/changed'(): void
+    /**
+     * One settings namespace's resolved value changed on the host
+     * (host/settings-changed passthrough). Subscribers refetch
+     * `settings.describe`; the frame carries no values.
+     * @mode emit
+     * @param ns - the namespace whose resolved value changed.
+     */
+    'settings/changed'(ns: string): void
+    /**
+     * One credential reference's state changed on the host
+     * (host/credentials-changed passthrough). The ref is an
+     * environment-variable NAME — never a value.
+     * @mode emit
+     * @param ref - the reference whose configured state changed.
+     */
+    'credentials/changed'(ref: string): void
+    /**
+     * The host provider topology changed (host/models-changed passthrough).
+     * Subscribers refetch `llm.providers`/`llm.models`/`session.models`.
+     * @mode emit
+     */
+    'models/changed'(): void
     /**
      * A connection generation was (re-)established. Wire-derived caches must
      * treat their state as stale and repull (commands directory; the queue
@@ -170,8 +192,13 @@ export function apply(ctx: Context): void {
       sessions.handleHostEnvelope(envelope)
       workspaces.handleHostEnvelope(envelope)
       // Typed-event bridge: the session layer ignores registry frames (no
-      // session routing); consumers (command directory caches) subscribe on ctx.
-      if (envelope.payload.type === 'host/commands-changed') ctx.emit('commands/changed')
+      // session routing); consumers (command directory caches, the settings
+      // and model surfaces) subscribe on ctx.
+      const frame = envelope.payload
+      if (frame.type === 'host/commands-changed') ctx.emit('commands/changed')
+      else if (frame.type === 'host/settings-changed') ctx.emit('settings/changed', frame.ns)
+      else if (frame.type === 'host/credentials-changed') ctx.emit('credentials/changed', frame.ref)
+      else if (frame.type === 'host/models-changed') ctx.emit('models/changed')
       try {
         sessionHistory.handleHostEnvelope(envelope)
       } catch (error) {

packages/client/runtime/src/client/session-history/source.ts

@@ -1,12 +1,14 @@
 import type {
   HistoryEntry, IApiClient, MuxFrame, RpcError, SessionId,
 } from '@deepseek-ai/dsh-client-connection/client'
+import type { SessionEvent } from '@deepseek-ai/dsh-session/types'
 import { transportError } from '@deepseek-ai/dsh-host-apiproxy/api'
 import type {
   SessionHistoryFace, SessionHistorySnapshot,
 } from '../contract/session-history.ts'
 import { createHistoryInspection } from '../sessions/history.ts'
 import { Notifier } from '../sessions/notifier.ts'
+import { PartialAccumulator } from '../sessions/partial.ts'
 
 const HISTORY_PAGE_MESSAGES = 50
 
@@ -33,6 +35,9 @@ export class SessionHistorySource implements SessionHistoryFace {
     entries: readonly HistoryEntry[]
     value: SessionHistorySnapshot['inspection']
   } | null = null
+  private streamPublishToken: object | null = null
+  private streamBaseInspection: SessionHistorySnapshot['inspection'] | null = null
+  private streamPartial: PartialAccumulator | null = null
   private snapshotCache: SessionHistorySnapshot
   private readonly notifier = new Notifier(() => {
     this.snapshotCache = this.buildSnapshot()
@@ -125,7 +130,7 @@ export class SessionHistorySource implements SessionHistoryFace {
     if (this.state !== 'cold') {
       this.state = 'cold'
       this.error = null
-      this.notifier.markDirty()
+      this.publishDirtyNow()
     }
   }
 
@@ -143,7 +148,7 @@ export class SessionHistorySource implements SessionHistoryFace {
     this.hasMore = false
     this.state = 'cold'
     this.error = null
-    this.notifier.markDirty()
+    this.publishDirtyNow()
     void this.loadForConsumers()
   }
 
@@ -155,6 +160,9 @@ export class SessionHistorySource implements SessionHistoryFace {
     this.openPromise = null
     this.olderPromise = null
     this.liveBuffer = []
+    this.streamPublishToken = null
+    this.streamBaseInspection = null
+    this.streamPartial = null
   }
 
   private open(): Promise<void> {
@@ -188,7 +196,7 @@ export class SessionHistorySource implements SessionHistoryFace {
   private async doOpen(generation: number): Promise<void> {
     this.state = 'loading'
     this.error = null
-    this.notifier.markDirty()
+    this.publishDirtyNow()
     try {
       let { result } = await this.api.sessions.history({
         sessionId: this.sessionId,
@@ -222,7 +230,7 @@ export class SessionHistorySource implements SessionHistoryFace {
       /* v8 ignore next -- transportError always returns the error branch. */
       this.error = folded.ok ? null : folded.error
     } finally {
-      if (generation === this.generation) this.notifier.markDirty()
+      if (generation === this.generation) this.publishDirtyNow()
     }
   }
 
@@ -261,7 +269,7 @@ export class SessionHistorySource implements SessionHistoryFace {
     const settled = operation.finally(() => {
       if (this.olderPromise !== settled) return
       this.olderPromise = null
-      this.notifier.markDirty()
+      this.publishDirtyNow()
     })
     this.olderPromise = settled
     return settled
@@ -286,7 +294,7 @@ export class SessionHistorySource implements SessionHistoryFace {
     const buffered = this.liveBuffer
     this.liveBuffer = []
     for (const entry of buffered) this.appendLive(entry)
-    this.notifier.markDirty()
+    this.publishDirtyNow()
   }
 
   private acceptLive(entry: HistoryEntry): void {
@@ -301,8 +309,16 @@ export class SessionHistorySource implements SessionHistoryFace {
       void this.repairGap()
       return
     }
+    if (
+      entry.event.type === 'assistant/chunk'
+      && entry.event.data.chunk.type !== 'usage'
+    ) {
+      if (!this.appendIncrementalChunk(entry, entry.event)) return
+      this.publishStreamDirty()
+      return
+    }
     this.appendLive(entry)
-    this.notifier.markDirty()
+    this.publishDirtyNow()
   }
 
   private appendLive(entry: HistoryEntry): void {
@@ -311,6 +327,66 @@ export class SessionHistorySource implements SessionHistoryFace {
     this.entries = [...this.entries, entry]
   }
 
+  /** Append a chunk against the cached finalized projection; false means no visible publish. */
+  private appendIncrementalChunk(
+    entry: HistoryEntry,
+    event: SessionEvent<'assistant/chunk'>,
+  ): boolean {
+    const { turn, step, chunk } = event.data
+    if (!isVisibleAssistantChunk(chunk.type)) {
+      const inspection = this.currentInspection()
+      this.appendLive(entry)
+      this.inspectionCache = { entries: this.entries, value: inspection }
+      return false
+    }
+    const base = this.streamBaseInspection ?? this.currentInspection()
+    this.streamBaseInspection = base
+    if (
+      this.streamPartial === null
+      || this.streamPartial.turn !== turn
+      || this.streamPartial.step !== step
+    ) {
+      const current = base.partial
+      this.streamPartial = new PartialAccumulator(
+        turn,
+        step,
+        current?.turn === turn && current.step === step ? current.blocks : [],
+      )
+    }
+    this.streamPartial.push(chunk)
+    this.appendLive(entry)
+    this.inspectionCache = {
+      entries: this.entries,
+      value: { ...base, partial: this.streamPartial.toPartial() },
+    }
+    return true
+  }
+
+  /** Coalesce token-stream projection and rendering work to one publish per browser frame. */
+  private publishStreamDirty(): void {
+    if (this.streamPublishToken !== null) return
+    const token = {}
+    this.streamPublishToken = token
+    const publish = () => {
+      if (this.streamPublishToken !== token) return
+      this.streamPublishToken = null
+      this.notifier.markDirty()
+    }
+    if (typeof globalThis.requestAnimationFrame === 'function') {
+      globalThis.requestAnimationFrame(publish)
+    } else {
+      queueMicrotask(publish)
+    }
+  }
+
+  /** Publish structural changes immediately and invalidate an older scheduled stream publish. */
+  private publishDirtyNow(): void {
+    this.streamPublishToken = null
+    this.streamBaseInspection = null
+    this.streamPartial = null
+    this.notifier.markDirty()
+  }
+
   private async repairGap(): Promise<void> {
     if (this.stitching) return
     this.stitching = true
@@ -335,6 +411,16 @@ export class SessionHistorySource implements SessionHistoryFace {
   }
 
   private buildSnapshot(): SessionHistorySnapshot {
+    return {
+      state: this.state,
+      error: this.error,
+      hasMore: this.hasMore,
+      inspection: this.currentInspection(),
+    }
+  }
+
+  /** Inspection pinned to the source's current immutable entry array. */
+  private currentInspection(): SessionHistorySnapshot['inspection'] {
     if (this.inspectionCache?.entries !== this.entries) {
       const entries = this.entries
       this.inspectionCache = {
@@ -342,11 +428,14 @@ export class SessionHistorySource implements SessionHistoryFace {
         value: createHistoryInspection(() => entries),
       }
     }
-    return {
-      state: this.state,
-      error: this.error,
-      hasMore: this.hasMore,
-      inspection: this.inspectionCache.value,
-    }
+    return this.inspectionCache.value
   }
 }
+
+function isVisibleAssistantChunk(type: string): boolean {
+  return type === 'block-start'
+    || type === 'text-delta'
+    || type === 'reasoning-delta'
+    || type === 'tool-call-delta'
+    || type === 'block-end'
+}

packages/client/runtime/src/client/sessions/manager.ts

@@ -289,6 +289,40 @@ export class SessionManager {
     }
   }
 
+  /**
+   * Contract session.fork; on success merge the child into summaries
+   * immediately (same synchronous-addressability guarantee as create). The
+   * child carries the source's history, so it is never blank; lineage rides
+   * parentSessionId so the list nests it under its source. A child published
+   * before Workspace attachment fails is also reconciled into the list.
+   * @param opts - source session and the optional seq anchoring the cut.
+   * @returns the fork result (the child session id).
+   */
+  async fork(
+    opts: { sessionId: SessionId; atSeq?: number },
+  ): Promise<RpcResult<{ sessionId: SessionId }>> {
+    try {
+      const source = this.summaries.find(s => s.sessionId === opts.sessionId)
+      const { result } = await this.api.sessions.fork({
+        sessionId: opts.sessionId,
+        ...opts.atSeq === undefined ? {} : { atSeq: opts.atSeq },
+      })
+      const childId = result.ok
+        ? result.value.sessionId
+        : workspaceAttachSessionId(result.error)
+      if (childId !== undefined) {
+        this.recordMutation({ kind: 'upsert', summary: {
+          sessionId: childId, updatedAt: Date.now(), running: false, blank: false,
+          parentSessionId: opts.sessionId,
+          ...(source?.cwd !== undefined ? { cwd: source.cwd } : {}),
+        } })
+      }
+      return result
+    } catch (error) {
+      return transportError(error)
+    }
+  }
+
   /**
    * Insert-or-enrich a locally synthesized summary: a new id prepends; an
    * existing entry only gains fields it lacks (the session-added frame and the

packages/client/runtime/src/client/sessions/partial.ts

@@ -13,8 +13,18 @@ export class PartialAccumulator {
   private changed = true
   private snapshot: PartialAssistant
 
-  constructor(readonly turn: number, readonly step: number) {
-    this.snapshot = { turn, step, blocks: [] }
+  /**
+   * @param turn - Owning agent turn.
+   * @param step - Owning model step.
+   * @param initialBlocks - Materialized prefix when accumulation begins after history replay.
+   */
+  constructor(
+    readonly turn: number,
+    readonly step: number,
+    initialBlocks: readonly AssistantBlock[] = [],
+  ) {
+    this.blocks = [...initialBlocks]
+    this.snapshot = { turn, step, blocks: initialBlocks }
   }
 
   /**

packages/client/runtime/src/client/sessions/service.ts

@@ -81,6 +81,22 @@ export class SessionCreateError extends Error {
   }
 }
 
+/** Structured session-fork failure. */
+export class SessionForkError extends Error {
+  override readonly name = 'SessionForkError'
+
+  /**
+   * @param rpcError - Host business or folded transport error.
+   * @param sourceSessionId - the session the fork was cut from.
+   */
+  constructor(
+    readonly rpcError: RpcError,
+    readonly sourceSessionId: SessionId,
+  ) {
+    super(`session fork failed: ${rpcError.code}: ${rpcError.message}`)
+  }
+}
+
 /** Session assembly handle for SessionProvider/inject factories (identity-stable per session). */
 export interface SessionBinding {
   readonly sessionId: SessionId
@@ -121,6 +137,24 @@ function displayTitleOf(title: string | undefined, cwd: string | undefined, id:
   return id
 }
 
+/**
+ * Increment a trailing fork number while preserving its half-width or
+ * full-width parentheses; an unnumbered title starts with ` (1)`.
+ * @param title - source session's durable title.
+ * @returns the title assigned to the fork child.
+ */
+function increasedForkTitle(title: string): string {
+  const ascii = /^(.*?)\((\d+)\)$/u.exec(title)
+  if (ascii?.[1] !== undefined && ascii[2] !== undefined) {
+    return `${ascii[1]}(${BigInt(ascii[2]) + 1n})`
+  }
+  const fullWidth = /^(.*?)（(\d+)）$/u.exec(title)
+  if (fullWidth?.[1] !== undefined && fullWidth[2] !== undefined) {
+    return `${fullWidth[1]}（${BigInt(fullWidth[2]) + 1n}）`
+  }
+  return `${title} (1)`
+}
+
 interface ScopeRecord {
   fiber: Fiber
   ctx: Context
@@ -317,6 +351,42 @@ export class SessionsService implements ISessions {
     return result.value.sessionId
   }
 
+  /**
+   * Fork a session from a completed-turn prefix of the source (same
+   * synchronous-addressability guarantee as {@link SessionsService.create}:
+   * on resolution the child is in the list store and open() can target it).
+   * @param opts - source session id, the optional event seq anchoring the
+   *   cut (the boundary is the first turn/end at or after it; an in-log
+   *   anchor in an open turn is unavailable rather than clipped backward),
+   *   and whether to increment an inherited durable title before resolving.
+   * @returns the child session id.
+   * @throws {SessionForkError} with the source id.
+   * @throws {Error} when a requested child-title rename fails after creation.
+   */
+  async fork(opts: {
+    sessionId: SessionId
+    atSeq?: number
+    increaseTitle?: boolean
+  }): Promise<SessionId> {
+    const sourceTitle = opts.increaseTitle
+      ? this.list.getSnapshot().byId[opts.sessionId]?.title
+      : undefined
+    const result = await this.manager.fork({
+      sessionId: opts.sessionId,
+      ...(opts.atSeq === undefined ? {} : { atSeq: opts.atSeq }),
+    })
+    if (!result.ok) throw new SessionForkError(result.error, opts.sessionId)
+    this.projectList()
+    const childId = result.value.sessionId
+    if (sourceTitle !== undefined) {
+      const child = this.binding(childId)?.session
+      if (child === undefined) throw new Error(`fork child "${childId}" is not locally addressable`)
+      const renamed = await child.rename(increasedForkTitle(sourceTitle))
+      if (!renamed.ok) throw new Error(`fork child rename failed: ${renamed.error.code}: ${renamed.error.message}`)
+    }
+    return childId
+  }
+
   /**
    * Resolve an Agent-scoped context view (use-and-discard).
    * @param id - session id (the agent identity — 1:1 same axis).

packages/client/runtime/tests/fake-api.ts

@@ -62,8 +62,9 @@ export class FakeApiClient implements IApiClient {
   // Programmable slots (defaults answer OK-empty); reassign per case.
   onList: (payload: unknown) => Promise<RpcResponse<{ items: never[] }>> = () => Promise.resolve(ok({ items: [] }))
   onCreate: (payload: unknown) => Promise<RpcResponse<{ sessionId: SessionId }>> = () => Promise.resolve(ok({ sessionId: 'fk-new' as SessionId }))
-  readonly defaultModel: ModelTarget = { provider: 'deepseek', model: 'deepseek-v4-flash' }
+  readonly defaultModel: ModelTarget = { provider: 'deepseek-official', model: 'deepseek-v4-flash' }
   onRename: (payload: unknown) => Promise<RpcResponse<{ title: string; seq: number }>> = () => Promise.resolve(ok({ title: 'fk-renamed', seq: 0 }))
+  onFork: (payload: unknown) => Promise<RpcResponse<{ sessionId: SessionId }>> = () => Promise.resolve(ok({ sessionId: 'fk-fork' as SessionId }))
   onHistory: (payload: { sessionId: SessionId; beforeSeq?: number; maxMessages?: number })
   => Promise<RpcResponse<{ events: never[]; hasMore: boolean }>> =
     () => Promise.resolve(ok({ events: [], hasMore: false }))
@@ -71,7 +72,7 @@ export class FakeApiClient implements IApiClient {
   onModels: (payload: unknown) => Promise<RpcResponse<SessionModels>> = () => Promise.resolve(ok({
     current: this.defaultModel,
     groups: [{
-      id: 'deepseek',
+      id: 'deepseek-official',
       name: 'DeepSeek',
       models: [{ id: 'deepseek-v4-flash', name: 'DeepSeek V4 Flash' }],
     }],
@@ -118,6 +119,7 @@ export class FakeApiClient implements IApiClient {
     selectModel: (payload: { provider: string; model: string }) =>
       this.record('session.selectModel', payload, this.onSelectModel(payload)),
     rename: (payload: unknown) => this.record('session.rename', payload, this.onRename(payload)),
+    fork: (payload: unknown) => this.record('session.fork', payload, this.onFork(payload)),
     prompt: (payload: unknown) => this.record('session.prompt', payload, this.onPrompt(payload)),
     updateQueue: (payload: unknown) => this.record('session.updateQueue', payload, this.onUpdateQueue(payload)),
     cancel: (payload: unknown) => this.record('session.cancel', payload, this.onCancel(payload)),
@@ -181,6 +183,24 @@ export class FakeApiClient implements IApiClient {
     clear: payload => this.record('goal.clear', payload, Promise.resolve(ok({ cleared: true as const }))),
   }
 
+  readonly settings: IApiClient['settings'] = {
+    describe: payload => this.record('settings.describe', payload, Promise.resolve(ok({ writable: true, namespaces: [] }))),
+    update: payload => this.record('settings.update', payload, Promise.resolve(ok({ ns: 'fake', schema: {}, value: {}, applies: 'live' as const, secrets: [], revision: 0 }))),
+    replace: payload => this.record('settings.replace', payload, Promise.resolve(ok({ ns: 'fake', schema: {}, value: {}, applies: 'live' as const, secrets: [], revision: 0 }))),
+    mutate: payload => this.record('settings.mutate', payload, Promise.resolve(ok({ ns: 'fake', schema: {}, value: {}, applies: 'live' as const, secrets: [], revision: 0 }))),
+  }
+
+  readonly credentials: IApiClient['credentials'] = {
+    describe: payload => this.record('credentials.describe', payload, Promise.resolve(ok({ credentials: {} }))),
+    set: payload => this.record('credentials.set', payload, Promise.resolve(ok({}))),
+    unset: payload => this.record('credentials.unset', payload, Promise.resolve(ok({}))),
+  }
+
+  readonly llm: IApiClient['llm'] = {
+    providers: payload => this.record('llm.providers', payload, Promise.resolve(ok({ providers: [] }))),
+    models: payload => this.record('llm.models', payload, Promise.resolve(ok({ groups: [], failures: [] }))),
+  }
+
   /** When true, streams never fire onOpen (misbehaving-carrier material for the handshake timeout guard). */
   suppressStreamOpen = false
 

packages/client/runtime/tests/manager.spec.ts

@@ -277,6 +277,23 @@ describe('remaining branches', () => {
     expect(manager.getListSnapshot().items[0]).not.toHaveProperty('cwd')
   })
 
+  it('reconciles a fork child published before workspace attachment fails', async () => {
+    const api = new FakeApiClient()
+    api.onFork = () => Promise.resolve(err({
+      code: 'workspace-attach-failed',
+      message: 'forked but unattached',
+      details: { sessionId: S2, workspaceId: 'w1' },
+    } as never))
+    const manager = new SessionManager(api)
+    const result = await manager.fork({ sessionId: S1 })
+    expect(result).toMatchObject({ ok: false, error: { code: 'workspace-attach-failed' } })
+    expect(manager.getListSnapshot().items).toEqual([expect.objectContaining({
+      sessionId: S2,
+      parentSessionId: S1,
+      blank: false,
+    })])
+  })
+
   it('reconciles a preallocated id after an ordinary transport failure', async () => {
     const api = new FakeApiClient()
     api.onCreate = () => Promise.reject(new Error('response lost'))
@@ -361,7 +378,7 @@ describe('connected generation', () => {
     api.onHistory = () => Promise.resolve(ok({
       events: entries(plainTurn(0, 0, 'a', 'b')) as never[],
       hasMore: false,
-      modelTarget: { provider: 'deepseek', model: 'deepseek-chat' },
+      modelTarget: { provider: 'deepseek-official', model: 'deepseek-chat' },
     }))
     const manager = new SessionManager(api)
     const openedSession = manager.get(S1)

packages/client/runtime/tests/partial.spec.ts

@@ -41,6 +41,12 @@ describe('PartialAccumulator', () => {
     expect(acc.toPartial().blocks).toEqual([{ kind: 'reasoning', text: '思考' }])
   })
 
+  it('continues from a materialized history prefix', () => {
+    const acc = new PartialAccumulator(1, 0, [{ kind: 'text', text: '已有' }])
+    acc.push(chunk({ type: 'text-delta', index: 0, text: '增量' }))
+    expect(acc.toPartial().blocks).toEqual([{ kind: 'text', text: '已有增量' }])
+  })
+
   it('folds tool-call deltas: first id pins callId, late name overrides, argsRaw concatenates', () => {
     const acc = new PartialAccumulator(1, 0)
     acc.push(chunk({ type: 'tool-call-delta', index: 0, id: 'c1', argumentsDelta: '{"a"' }))

packages/client/runtime/tests/session-history-source.spec.ts

@@ -1,4 +1,4 @@
-import { describe, expect, it } from 'vitest'
+import { afterEach, describe, expect, it, vi } from 'vitest'
 import type { SessionEvent } from '@deepseek-ai/dsh-session/types'
 import type { SessionId } from '@deepseek-ai/dsh-client-connection/client'
 import { SessionHistorySource } from '../src/client/session-history/source.ts'
@@ -7,6 +7,10 @@ import { entries, ev, plainTurn } from './event-script.ts'
 
 const SID = 'history-s1' as SessionId
 
+afterEach(() => {
+  vi.unstubAllGlobals()
+})
+
 function histResponse(events: SessionEvent[], hasMore = false) {
   return Promise.resolve(ok({ events: entries(events) as never[], hasMore }))
 }
@@ -52,6 +56,71 @@ describe('SessionHistorySource', () => {
       .toEqual([1, 3, 6])
   })
 
+  it('publishes multiple assistant chunks once per browser frame', async () => {
+    const api = new FakeApiClient()
+    api.onHistory = () => histResponse(plainTurn(0, 0, '问', '答'))
+    const source = new SessionHistorySource(SID, api)
+    await source.loadAll()
+    const frames: FrameRequestCallback[] = []
+    vi.stubGlobal('requestAnimationFrame', (callback: FrameRequestCallback) => {
+      frames.push(callback)
+      return frames.length
+    })
+    let notifications = 0
+    const unsubscribe = source.subscribe(() => { notifications++ })
+    const before = source.getSnapshot().inspection
+    const finalizedNodes = before.eventNodes
+    const requests = before.requests
+    const contexts = before.contexts
+
+    for (const event of [
+      ev.chunkStart(6, 1),
+      ev.chunkText(7, 1, 'stream '),
+      ev.chunkText(8, 1, 'content'),
+    ]) {
+      source.handleMuxFrame({
+        type: 'session/event',
+        sessionId: SID,
+        event,
+      })
+    }
+
+    expect(frames).toHaveLength(1)
+    expect(notifications).toBe(0)
+    frames[0]?.(0)
+    await Promise.resolve()
+
+    expect(notifications).toBe(1)
+    const streamed = source.getSnapshot().inspection
+    expect(streamed.eventNodes).toBe(finalizedNodes)
+    expect(streamed.requests).toBe(requests)
+    expect(streamed.contexts).toBe(contexts)
+    expect(streamed.partial?.blocks).toEqual([
+      { kind: 'text', text: 'stream content' },
+    ])
+
+    source.handleMuxFrame({
+      type: 'session/event',
+      sessionId: SID,
+      event: ev.chunkText(9, 1, ' then final'),
+    })
+    source.handleMuxFrame({
+      type: 'session/event',
+      sessionId: SID,
+      event: ev.assistant(10, 1, 'stream content then final'),
+    })
+    await Promise.resolve()
+
+    expect(notifications).toBe(2)
+    const finalized = source.getSnapshot().inspection
+    expect(finalized.eventNodes).not.toBe(finalizedNodes)
+    expect(finalized.partial).toBeNull()
+    frames[1]?.(0)
+    await Promise.resolve()
+    expect(notifications).toBe(2)
+    unsubscribe()
+  })
+
   it('stops loading when an older page fails to advance', async () => {
     const api = new FakeApiClient()
     api.onHistory = payload => payload.beforeSeq === undefined

packages/client/runtime/tests/session.spec.ts

@@ -78,7 +78,7 @@ describe('open', () => {
     gate.resolve(ok({
       events: entries(page) as never[],
       hasMore: false,
-      modelTarget: { provider: 'deepseek', model: 'deepseek-v4-flash' },
+      modelTarget: { provider: 'deepseek-official', model: 'deepseek-v4-flash' },
     }))
     await opening
     const seqs = session.getSnapshot().nodes.map(n => n.seq)
@@ -135,7 +135,7 @@ describe('live event path', () => {
     expect(session.getSnapshot().composerPhase).toBe('blank')
     const feed = (event: SessionEvent) => { session.handleMuxEnvelope('r' as never, { type: 'session/event', sessionId: SID, event }) }
     feed(ev.commandRun(0, 'cmd-perm', 'permission', ' danger-full-access'))
-    feed(ev.commandDone(1, 'cmd-perm', 'success', 'Permission preset: danger-full-access.'))
+    feed(ev.commandDone(1, 'cmd-perm', 'success', 'preset danger-full-access'))
     const snapshot = session.getSnapshot()
     expect(snapshot.nodes.at(-1)).toMatchObject({ kind: 'command', name: 'permission' })
     expect(snapshot.composerPhase).toBe('blank')
@@ -255,7 +255,7 @@ describe('paging', () => {
     gate.resolve(ok({
       events: entries(plainTurn(0, 0, 'a', 'b')) as never[],
       hasMore: false,
-      modelTarget: { provider: 'deepseek', model: 'deepseek-v4-flash' },
+      modelTarget: { provider: 'deepseek-official', model: 'deepseek-v4-flash' },
     }))
     await Promise.all([first, second])
     expect(api.callsOf('session.history')).toHaveLength(2) // open + one page, not two
@@ -571,7 +571,7 @@ describe('remaining branches', () => {
     stale.resolve(ok({
       events: entries(plainTurn(0, 0, '旧', '代')) as never[],
       hasMore: false,
-      modelTarget: { provider: 'deepseek', model: 'stale' },
+      modelTarget: { provider: 'deepseek-official', model: 'stale' },
     })) // success, but its generation is gone
     await Promise.all([opening, resynced])
     expect(session.getSnapshot().nodes.map(n => n.seq)).toEqual([7, 9]) // only the fresh generation's window
@@ -594,7 +594,7 @@ describe('remaining branches', () => {
     secondPull.resolve(ok({
       events: entries([...plainTurn(0, 0, 'a', 'b'), ...plainTurn(6, 1, 'c', 'd')]) as never[],
       hasMore: false,
-      modelTarget: { provider: 'deepseek', model: 'stale' },
+      modelTarget: { provider: 'deepseek-official', model: 'stale' },
     }))
     await Promise.all([opening, resynced])
     expect(session.getSnapshot().openState).toBe('open')
@@ -612,7 +612,7 @@ describe('remaining branches', () => {
     repairPull.resolve(ok({
       events: entries(plainTurn(0, 0, '旧', '页')) as never[],
       hasMore: false,
-      modelTarget: { provider: 'deepseek', model: 'stale' },
+      modelTarget: { provider: 'deepseek-official', model: 'stale' },
     })) // repair result: stale, dropped
     await resynced
     expect(session.getSnapshot().nodes.map(n => n.seq)).toEqual([7, 9])
@@ -657,7 +657,7 @@ describe('remaining branches', () => {
         { event: ev.toolResult(7, 1, 'h1', 'done'), view: { for: 'result', view: { card: 'generic', title: '历史果' } } },
       ] as never[],
       hasMore: false,
-      modelTarget: { provider: 'deepseek', model: 'deepseek-v4-flash' },
+      modelTarget: { provider: 'deepseek-official', model: 'deepseek-v4-flash' },
     }))
     await session.open()
     expect(session.getSnapshot().nodes.at(-1)).toMatchObject({

packages/client/runtime/tests/sessions-service.spec.ts

@@ -10,7 +10,7 @@ import { Context } from 'cordis'
 import { afterEach, describe, expect, it, vi } from 'vitest'
 import type { SessionId } from '@deepseek-ai/dsh-client-connection/client'
 import { SessionCreateError, SessionsService, scopeOf } from '../src/client/sessions/service.ts'
-import { FakeApiClient, deferred, ok } from './fake-api.ts'
+import { FakeApiClient, deferred, err, ok } from './fake-api.ts'
 
 const sid = (s: string): SessionId => s as SessionId
 
@@ -399,6 +399,69 @@ describe('create', () => {
   })
 })
 
+describe('fork', () => {
+  it.each([
+    ['Roadmap', 'Roadmap (1)'],
+    ['Roadmap (1)', 'Roadmap (2)'],
+    ['计划（1）', '计划（2）'],
+    ['计划 （9）', '计划 （10）'],
+  ])('increments the durable title %j after the child is published', async (sourceTitle, childTitle) => {
+    const b = bench()
+    b.svc.handleMuxEnvelope({
+      rpcId: 'source-title' as never,
+      payload: { type: 'session/projection', sessionId: sid('source'), key: 'title', value: sourceTitle, seq: 2 } as never,
+    })
+    await feedList(b, [{ id: 'source', cwd: '/work' }])
+    b.api.onFork = () => Promise.resolve(ok({ sessionId: sid('child') }))
+    b.api.onRename = (payload) => {
+      const { title } = payload as { title: string }
+      return Promise.resolve(ok({ title, seq: 3 }))
+    }
+
+    await expect(b.svc.fork({
+      sessionId: sid('source'), atSeq: 7, increaseTitle: true,
+    })).resolves.toBe('child')
+
+    expect(b.api.callsOf('session.fork')).toEqual([{ sessionId: 'source', atSeq: 7 }])
+    expect(b.api.callsOf('session.rename')).toEqual([{ sessionId: 'child', title: childTitle }])
+    await Promise.resolve()
+    expect(b.svc.list.getSnapshot().byId[sid('child')]).toMatchObject({
+      title: childTitle,
+      displayTitle: childTitle,
+      parentId: 'source',
+    })
+  })
+
+  it('does not rename without the title policy or a durable source title', async () => {
+    const b = bench()
+    await feedList(b, [{ id: 'source', cwd: '/work' }])
+    b.api.onFork = () => Promise.resolve(ok({ sessionId: sid('child') }))
+    await expect(b.svc.fork({ sessionId: sid('source'), increaseTitle: true })).resolves.toBe('child')
+    expect(b.api.callsOf('session.rename')).toEqual([])
+
+    b.api.onFork = () => Promise.resolve(ok({ sessionId: sid('child-2') }))
+    await expect(b.svc.fork({ sessionId: sid('source') })).resolves.toBe('child-2')
+    expect(b.api.callsOf('session.rename')).toEqual([])
+  })
+
+  it('rejects when child rename fails while keeping the published child addressable', async () => {
+    const b = bench()
+    b.svc.handleMuxEnvelope({
+      rpcId: 'source-title' as never,
+      payload: { type: 'session/projection', sessionId: sid('source'), key: 'title', value: 'Roadmap', seq: 2 } as never,
+    })
+    await feedList(b, [{ id: 'source' }])
+    b.api.onFork = () => Promise.resolve(ok({ sessionId: sid('child') }))
+    b.api.onRename = () => Promise.resolve(err({
+      code: 'title-invalid', message: 'rejected', details: { sessionId: sid('child') },
+    }))
+
+    await expect(b.svc.fork({ sessionId: sid('source'), increaseTitle: true }))
+      .rejects.toThrow('fork child rename failed: title-invalid: rejected')
+    expect(b.svc.binding(sid('child'))).toBeDefined()
+  })
+})
+
 describe('scope lifecycle rides the list mirror (entity parity: no client-side pre-birth)', () => {
   it('a session-added frame births the row (blank) and makes the scope resolvable; removal prunes it', async () => {
     const b = bench()

packages/client/runtime/tests/wire-events.spec.ts

@@ -44,6 +44,22 @@ describe('wire event bridge', () => {
     expect(changed).toBe(1)
   })
 
+  it('broadcasts the settings/credentials/models invalidations with their frame payloads', async () => {
+    const bench = await mount()
+    const seen: unknown[][] = []
+    bench.ctx.on('settings/changed', ns => seen.push(['settings', ns]))
+    bench.ctx.on('credentials/changed', ref => seen.push(['credentials', ref]))
+    bench.ctx.on('models/changed', () => seen.push(['models']))
+    bench.sinks?.onHostEnvelope?.({ rpcId: 'r3' as never, payload: { type: 'host/settings-changed', ns: 'llm-pi-ai' } })
+    bench.sinks?.onHostEnvelope?.({ rpcId: 'r4' as never, payload: { type: 'host/credentials-changed', ref: 'OPENAI_API_KEY' } })
+    bench.sinks?.onHostEnvelope?.({ rpcId: 'r5' as never, payload: { type: 'host/models-changed' } })
+    expect(seen).toEqual([
+      ['settings', 'llm-pi-ai'],
+      ['credentials', 'OPENAI_API_KEY'],
+      ['models'],
+    ])
+  })
+
   it('broadcasts connection/reset on every established generation (reconnect invalidation)', async () => {
     const bench = await mount()
     let resets = 0

packages/client/schema-form/README.i18n.yaml

@@ -0,0 +1,6 @@
+# Bilingual-pair consistency record (docs/i18n/README.md): the git blob hash of each
+# 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/schema-form/README.md
+README.md: 5dcef89cbffc8b03c3f2d874e870fa9767360d3c
+README.zh.md: a82acb7d85005da25858fb17cf42b49f06ae59db

packages/client/schema-form/README.md

@@ -0,0 +1,23 @@
+# @deepseek-ai/dsh-client-schema-form
+
+English | [中文](README.zh.md)
+
+Schema/draft model layer for settings editors. The wire's `settings.describe` carries each namespace's serialized schemastery schema (`schema.toJSON()` ref envelope); `rehydrateSchema` turns it back into a live validator with `new Schema(json)` — the same schema object that validates a section on the host validates drafts in the browser, so client-side validation never drifts from the seam's. Editors render their own controls (the Models page hand-writes its card around the fields it probes here); this package owns no React and no rendering.
+
+## Contract
+
+The unit of editing is a **draft user section**: a plain object edited immutably (`setPath` materializes intermediates, `deletePath` is the per-field reset — dropping the key falls the resolved value back to the composition base and schema defaults). A field's presence in the draft marks it **overridden** (`hasPath`) — presence semantics, not value comparison, exactly mirroring the settings seam's layering. `nodeAtPath` resolves the schema node addressed by a configurable-provider directory `settingsPath` (object properties by name, dict entries through `inner`), so an editor can probe which fields a provider's profile carries (and their `meta.role`) before deciding what to render; an unresolvable path returns `undefined` so the caller degrades loudly instead of rendering a wrong subtree. `validateDraft(schema, draft)` runs the rehydrated validator and returns its failure message, letting pages reject an invalid draft before writing.
+
+## Model Experience
+
+None, as this package backs browser configuration editors; nothing here reaches a model request.
+
+#### KV Cache effect
+
+None; this package neither assembles nor sends a provider request.
+
+## Known Limitations and Deferred Work
+
+- **Rehydration executes the served envelope** — `rehydrateSchema` reconstructs a live schemastery validator, and schemastery revives serialized callbacks through `new Function`, so the schema envelope is executable content rather than inert data. That is acceptable only because the envelope comes from the same host that serves the page; a browser schema protocol should carry a description the client cannot execute, which is deferred with the settings seam's [wire-boundary work](../../settings/settings/README.md#known-limitations-and-deferred-work).
+- **Validation is draft-level, not per-field** — `validateDraft` reports schemastery's first failure message (which names the `$.path`); per-field error mapping is deferred until a consumer needs it.
+- **No generic renderer** — a schema-driven form component was built and then replaced by the hand-written Models editor ([Agent Note](../../../.agents/notes/implemented/architecture/2026-07-30-web-config-plane.md)); if a future page needs to edit arbitrary sections, it starts from these helpers, not from a resurrected generic renderer, unless the note's trade-off changes.

packages/client/schema-form/README.zh.md

@@ -0,0 +1,23 @@
+# @deepseek-ai/dsh-client-schema-form
+
+[English](README.md) | 中文
+
+面向 settings 编辑器的 schema／草稿模型层。wire 侧的 `settings.describe` 携带每个 namespace 的序列化 schemastery schema（`schema.toJSON()` 的 ref 信封）；`rehydrateSchema` 用 `new Schema(json)` 将其还原（rehydrate）为活的校验器——在宿主上校验分节的那份 schema 对象，就是在浏览器里校验草稿的那份对象，因此客户端校验绝不会偏离 seam 侧的校验。编辑器各自渲染自己的控件（Models 页围绕它在此探测到的字段手写自己的卡片）；该包（package）不含任何 React，也不做任何渲染。
+
+## 契约
+
+编辑的单元是**用户分节草稿**：一个以不可变方式编辑的普通对象（`setPath` 会物化中间对象，`deletePath` 即逐字段重置——去掉该键，解析值便回退到组合 base 与 schema 默认值）。字段只要出现在草稿中就被标记为**已覆盖**（`hasPath`）——判定采用存在性语义而非值比较，与 settings seam 的分层方式严格对应。`nodeAtPath` 解析可配置提供方目录 `settingsPath` 所寻址的 schema 节点（object 属性按名称解析，dict 条目经由 `inner`），编辑器因此可以在决定渲染什么之前，先探测某提供方的 profile 携带哪些字段（及其 `meta.role`）；无法解析的路径返回 `undefined`，调用方因此会大声降级，而不是渲染出错误的子树。`validateDraft(schema, draft)` 运行还原出的校验器并返回其失败消息，页面因此可以在写入前拒绝无效草稿。
+
+## Model Experience
+
+无。该包支撑的是浏览器配置编辑器；这里没有任何内容进入模型请求。
+
+#### KV Cache effect
+
+无；该包既不组装也不发送提供方请求。
+
+## Known Limitations and Deferred Work
+
+- **重建 schema 会执行所收到的信封**——`rehydrateSchema` 会重建一个活的 schemastery 校验器，而 schemastery 通过 `new Function` 复活序列化过的 callback，因此 schema 信封是可执行内容，而非惰性数据。这只有在信封来自提供该页面的同一 host 时才可接受；面向浏览器的 schema 协议应当传递客户端无法执行的描述，此项与 settings seam 的[协议边界工作](../../settings/settings/README.md#known-limitations-and-deferred-work)一并暂缓。
+- **校验是草稿级的，而非逐字段**——`validateDraft` 报告 schemastery 的第一条失败消息（其中会点名 `$.path`）；逐字段的报错映射延后到出现需要它的消费方再做。
+- **没有通用渲染器**——一个 schema 驱动的表单组件曾被构建出来，随后被手写的 Models 编辑器取代（[Agent Note（agent 决策记录）](../../../.agents/notes/implemented/architecture/2026-07-30-web-config-plane.md)）；若未来有页面需要编辑任意分节，起点是这些辅助函数，而不是复活后的通用渲染器——除非该 note 的权衡发生变化。

packages/client/schema-form/package.json

@@ -0,0 +1,40 @@
+{
+  "name": "@deepseek-ai/dsh-client-schema-form",
+  "description": "Schema/draft model layer for settings editors: rehydrates a serialized schemastery schema, validates drafts, and edits them immutably by path",
+  "version": "0.0.1",
+  "private": true,
+  "type": "module",
+  "main": "lib/index.js",
+  "types": "lib/types/index.d.ts",
+  "exports": {
+    ".": {
+      "types": "./lib/types/index.d.ts",
+      "default": "./lib/index.js"
+    },
+    "./invariant": {
+      "types": "./lib/types/invariant.d.ts",
+      "default": "./lib/invariant.js"
+    },
+    "./src/*": "./src/*",
+    "./package.json": "./package.json"
+  },
+  "license": "BSD-3-Clause",
+  "dependencies": {
+    "schemastery": "^3.18.0"
+  },
+  "peerDependencies": {
+    "@deepseek-ai/dsh-invariants": "^0.0.1",
+    "cordis": "^4.0.0-rc.7"
+  },
+  "devDependencies": {
+    "@deepseek-ai/dsh-invariants": "workspace:^",
+    "cordis": "^4.0.0-rc.7"
+  },
+  "files": [
+    "lib/index.js",
+    "lib/invariant.js",
+    "lib/types/**/*.d.ts",
+    "lib/types/**/*.d.ts.map",
+    "src"
+  ]
+}

packages/client/schema-form/src/index.ts

@@ -0,0 +1,12 @@
+/**
+ * Schema/draft model layer for settings editors: rehydrate the wire's
+ * serialized schemastery envelope, resolve nodes by settings path, validate
+ * drafts, and edit them immutably by path. Editors render their own controls
+ * (the Models page hand-writes its layout) on top of these helpers.
+ * @module @deepseek-ai/dsh-client-schema-form
+ */
+
+export {
+  deletePath, getPath, hasPath, nodeAtPath, rehydrateSchema, setPath, validateDraft,
+} from './model.ts'
+export type { SchemaNode } from './model.ts'

packages/client/schema-form/src/invariant.ts

@@ -0,0 +1,32 @@
+/**
+ * Package-owned invariant companion for `@deepseek-ai/dsh-client-schema-form`.
+ * @module @deepseek-ai/dsh-client-schema-form/invariant
+ */
+
+/* jscpd:ignore-start */
+import type { Context } from 'cordis'
+import type { InvariantInstaller } from '@deepseek-ai/dsh-invariants'
+
+const PACKAGE_NAME = '@deepseek-ai/dsh-client-schema-form'
+
+/** Cordis companion plugin name. */
+export const name = 'client-schema-form-invariant'
+/** Service required before the companion can reserve package ownership. */
+export const inject = ['invariants']
+
+/**
+ * No runtime invariant: a pure schema/draft helper library — it emits no
+ * cordis events and owns no cross-plugin mutable relation; draft
+ * immutability, schema rehydration, and path-edit round trips are asserted
+ * directly by this package's model specs.
+ */
+const install: InvariantInstaller = () => {}
+
+/**
+ * Register this package's invariant companion.
+ * @param ctx - Cordis context carrying the invariant service.
+ * @returns the installed registration's disposer after setup succeeds.
+ */
+export const apply = (ctx: Context): Promise<() => void> =>
+  Promise.resolve(ctx.invariants.register(PACKAGE_NAME, install))
+/* jscpd:ignore-end */

packages/client/schema-form/src/model.ts

@@ -0,0 +1,151 @@
+/**
+ * Schema introspection and draft-editing helpers behind settings editors.
+ * The serialized schemastery envelope (`schema.toJSON()`) rehydrates into a
+ * live validator whose node relations (`dict`/`inner`) editors probe for
+ * field presence and roles; drafts are edited immutably by path.
+ * @module @deepseek-ai/dsh-client-schema-form/model
+ */
+
+import Schema from 'schemastery'
+
+/** Live schemastery node; the renderer reads only its structural relations. */
+export type SchemaNode = Schema
+
+/**
+ * Rehydrate a serialized schema envelope into a live validator/node tree.
+ * @param serialized - `schema.toJSON()` output received over the wire.
+ * @returns the root schema node.
+ */
+export function rehydrateSchema(serialized: unknown): SchemaNode {
+  return new Schema(serialized as Schema)
+}
+
+/**
+ * Validate a draft against a rehydrated schema.
+ * @param schema - rehydrated root node.
+ * @param draft - candidate value.
+ * @returns the validation failure message, or `undefined` when the draft passes.
+ */
+export function validateDraft(schema: SchemaNode, draft: unknown): string | undefined {
+  try {
+    ;(schema as unknown as (value: unknown) => unknown)(draft)
+    return undefined
+  } catch (error) {
+    return error instanceof Error ? error.message : String(error)
+  }
+}
+
+/**
+ * Resolve the schema node at a settings path (the configurable-provider
+ * directory's `settingsPath` vocabulary): object properties by name, dict
+ * entries through `inner`. An unresolvable segment returns `undefined` so
+ * the caller falls back instead of rendering a wrong subtree.
+ * @param root - rehydrated section root node.
+ * @param path - key path from the section root.
+ * @returns the node describing that position, or `undefined`.
+ */
+export function nodeAtPath(root: SchemaNode, path: readonly string[]): SchemaNode | undefined {
+  let node: SchemaNode | undefined = root
+  for (const key of path) {
+    if (node === undefined) return undefined
+    if (node.type === 'object') node = (node.dict as Record<string, SchemaNode> | undefined)?.[key]
+    else if (node.type === 'dict' || node.type === 'array') node = node.inner as SchemaNode | undefined
+    else return undefined
+  }
+  return node
+}
+
+/**
+ * Read a nested value by path.
+ * @param value - root value (draft or fallback layer).
+ * @param path - key path from the root; array indexes as strings.
+ * @returns the value at the path, or `undefined` along a missing branch.
+ */
+export function getPath(value: unknown, path: readonly string[]): unknown {
+  let current: unknown = value
+  for (const key of path) {
+    if (Array.isArray(current)) {
+      current = current[Number(key)]
+      continue
+    }
+    if (typeof current !== 'object' || current === null) return undefined
+    current = (current as Record<string, unknown>)[key]
+  }
+  return current
+}
+
+/**
+ * Whether a draft explicitly carries the path (its presence marks a user
+ * override, independent of the value stored there).
+ * @param value - root value (draft or fallback layer).
+ * @param path - key path from the root; array indexes as strings.
+ * @returns whether the path's final key exists on its parent.
+ */
+export function hasPath(value: unknown, path: readonly string[]): boolean {
+  if (path.length === 0) return value !== undefined
+  const parent = getPath(value, path.slice(0, -1))
+  const key = path[path.length - 1] as string
+  if (Array.isArray(parent)) return Number(key) < parent.length
+  if (typeof parent !== 'object' || parent === null) return false
+  return key in parent
+}
+
+function cloneContainer(container: unknown, key: string): Record<string, unknown> | unknown[] {
+  if (Array.isArray(container)) return [...container as unknown[]]
+  if (typeof container === 'object' && container !== null) return { ...container as Record<string, unknown> }
+  // A missing intermediate materializes as the container the next key needs.
+  return /^\d+$/.test(key) ? [] : {}
+}
+
+/** Clone the container spine down to the leaf's parent, materializing missing intermediates. */
+function cloneSpine(root: Record<string, unknown>, path: readonly string[]): {
+  result: Record<string, unknown>
+  parent: Record<string, unknown> | unknown[]
+  leaf: string
+} {
+  const result = { ...root }
+  let target: Record<string, unknown> | unknown[] = result
+  for (let i = 0; i < path.length - 1; i++) {
+    const key = path[i] as string
+    const child = cloneContainer(
+      Array.isArray(target) ? target[Number(key)] : (target)[key],
+      path[i + 1] as string,
+    )
+    if (Array.isArray(target)) target[Number(key)] = child
+    else (target)[key] = child
+    target = child
+  }
+  return { result, parent: target, leaf: path[path.length - 1] as string }
+}
+
+/**
+ * Immutably set a nested value, materializing missing intermediate containers.
+ * @param root - draft root (never mutated).
+ * @param path - non-empty key path.
+ * @param value - value to store at the path.
+ * @returns the new draft root.
+ */
+export function setPath(root: Record<string, unknown>, path: readonly string[], value: unknown): Record<string, unknown> {
+  if (path.length === 0) throw new Error('schema-form: setPath needs a non-empty path')
+  const { result, parent, leaf } = cloneSpine(root, path)
+  if (Array.isArray(parent)) parent[Number(leaf)] = value
+  else parent[leaf] = value
+  return result
+}
+
+/**
+ * Immutably remove a nested key (the per-field reset: the resolved value
+ * falls back to the composition base and schema defaults). Removing along a
+ * missing branch returns the root unchanged.
+ * @param root - draft root (never mutated).
+ * @param path - non-empty key path.
+ * @returns the new draft root.
+ */
+export function deletePath(root: Record<string, unknown>, path: readonly string[]): Record<string, unknown> {
+  if (path.length === 0) throw new Error('schema-form: deletePath needs a non-empty path')
+  if (!hasPath(root, path)) return root
+  const { result, parent, leaf } = cloneSpine(root, path)
+  if (Array.isArray(parent)) parent.splice(Number(leaf), 1)
+  else Reflect.deleteProperty(parent, leaf)
+  return result
+}

packages/client/schema-form/tests/invariant.spec.ts

@@ -0,0 +1,12 @@
+import { describe, expect, it } from 'vitest'
+import { Context } from 'cordis'
+import * as SchemaFormInvariant from '@deepseek-ai/dsh-client-schema-form/invariant'
+import InvariantService from '@deepseek-ai/dsh-invariants'
+
+describe('invariant companion', () => {
+  it('registers under the package name with an empty installer', async () => {
+    const ctx = new Context()
+    await ctx.plugin(InvariantService, { enabled: true })
+    await expect(ctx.plugin(SchemaFormInvariant).await()).resolves.toBeDefined()
+  })
+})

packages/client/schema-form/tests/model.spec.ts

@@ -0,0 +1,100 @@
+import { describe, expect, it } from 'vitest'
+import Schema from 'schemastery'
+import {
+  deletePath, getPath, hasPath, nodeAtPath, rehydrateSchema, setPath, validateDraft,
+} from '../src/model.ts'
+
+const Wire = (schema: Schema): unknown => JSON.parse(JSON.stringify(schema.toJSON()))
+
+describe('rehydration and validation', () => {
+  it('rehydrates a serialized envelope into a working validator', () => {
+    const root = rehydrateSchema(Wire(Schema.object({ name: Schema.string().required() })))
+    expect(validateDraft(root, { name: 'ok' })).toBeUndefined()
+    expect(validateDraft(root, { name: 42 })).toContain('name')
+  })
+
+  it('stringifies non-Error validation throws', () => {
+    const hostile = (() => {
+      throw 'plain-string failure'
+    }) as unknown as Parameters<typeof validateDraft>[0]
+    expect(validateDraft(hostile, {})).toBe('plain-string failure')
+  })
+})
+
+describe('path helpers', () => {
+  const root = { providers: { openai: { baseURL: 'https://x' } }, models: [{ id: 'a' }] }
+
+  it('reads nested object and array paths', () => {
+    expect(getPath(root, [])).toBe(root)
+    expect(getPath(root, ['providers', 'openai', 'baseURL'])).toBe('https://x')
+    expect(getPath(root, ['models', '0', 'id'])).toBe('a')
+    expect(getPath(root, ['providers', 'missing', 'x'])).toBeUndefined()
+    expect(getPath(root, ['providers', 'openai', 'baseURL', 'deep'])).toBeUndefined()
+  })
+
+  it('reports draft presence by key existence, not value truthiness', () => {
+    expect(hasPath({ flag: false }, ['flag'])).toBe(true)
+    expect(hasPath({ nested: { key: undefined } }, ['nested', 'key'])).toBe(true)
+    expect(hasPath({}, ['missing'])).toBe(false)
+    expect(hasPath({ leaf: 'x' }, ['leaf', 'deeper'])).toBe(false)
+    expect(hasPath({ models: ['a'] }, ['models', '0'])).toBe(true)
+    expect(hasPath({ models: ['a'] }, ['models', '1'])).toBe(false)
+    expect(hasPath({ root: true }, [])).toBe(true)
+    expect(hasPath(undefined, [])).toBe(false)
+  })
+
+  it('sets nested paths immutably, materializing containers by key shape', () => {
+    const draft = {}
+    const next = setPath(draft, ['providers', 'openai', 'baseURL'], 'https://y')
+    expect(draft).toEqual({})
+    expect(next).toEqual({ providers: { openai: { baseURL: 'https://y' } } })
+    const withArray = setPath(next, ['models', '0'], { id: 'a' })
+    expect(withArray).toEqual({ providers: { openai: { baseURL: 'https://y' } }, models: [{ id: 'a' }] })
+    const replaced = setPath(withArray, ['models', '0', 'id'], 'b')
+    expect(replaced.models).toEqual([{ id: 'b' }])
+    expect((withArray as { models: unknown[] }).models).toEqual([{ id: 'a' }])
+    expect(() => setPath({}, [], 'x')).toThrow(/non-empty path/)
+  })
+
+  it('deletes nested paths immutably and splices array indexes', () => {
+    const draft = { providers: { openai: { baseURL: 'https://x', apiKey: 'k' } }, models: ['a', 'b'] }
+    const withoutKey = deletePath(draft, ['providers', 'openai', 'apiKey'])
+    expect(withoutKey).toEqual({ providers: { openai: { baseURL: 'https://x' } }, models: ['a', 'b'] })
+    expect(draft.providers.openai.apiKey).toBe('k')
+    const withoutModel = deletePath(withoutKey, ['models', '0'])
+    expect(withoutModel.models).toEqual(['b'])
+    expect(deletePath(draft, ['providers', 'missing', 'x'])).toBe(draft)
+    expect(() => deletePath({}, [])).toThrow(/non-empty path/)
+  })
+
+  it('deletes keys through array intermediates immutably', () => {
+    const draft = { models: [{ id: 'a', contextWindow: 1 }] }
+    const next = deletePath(draft, ['models', '0', 'contextWindow'])
+    expect(next).toEqual({ models: [{ id: 'a' }] })
+    expect(draft.models[0]).toEqual({ id: 'a', contextWindow: 1 })
+  })
+})
+
+describe('nodeAtPath', () => {
+  const Root = Schema.object({
+    providers: Schema.dict(Schema.object({ baseURL: Schema.string() })),
+    models: Schema.array(Schema.object({ id: Schema.string() })),
+    leaf: Schema.string(),
+  })
+
+  it('resolves object, dict, and array positions', () => {
+    const root = rehydrateSchema(Wire(Root))
+    expect(nodeAtPath(root, [])).toBe(root)
+    expect(nodeAtPath(root, ['providers', 'openai'])?.type).toBe('object')
+    expect(nodeAtPath(root, ['providers', 'openai', 'baseURL'])?.type).toBe('string')
+    expect(nodeAtPath(root, ['models', '0', 'id'])?.type).toBe('string')
+    expect(nodeAtPath(root, ['missing'])).toBeUndefined()
+    expect(nodeAtPath(root, ['missing', 'deeper'])).toBeUndefined()
+    expect(nodeAtPath(root, ['leaf', 'below'])).toBeUndefined()
+  })
+
+  it('tolerates structural nodes missing their relation maps', () => {
+    expect(nodeAtPath({ type: 'object' } as never, ['x'])).toBeUndefined()
+    expect(nodeAtPath({ type: 'dict' } as never, ['x'])).toBeUndefined()
+  })
+})

packages/client/schema-form/tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "extends": "../../../tsconfig.base.client.json",
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "lib/types"
+  },
+  "include": [
+    "src"
+  ],
+  "references": [
+    {
+      "path": "../../../vendor/schemastery"
+    },
+    {
+      "path": "../../support/invariants"
+    }
+  ]
+}

packages/client/test-runtime/src/index.ts

@@ -37,6 +37,7 @@ export { FixtureSession, TestSessions } from './sessions.ts'
 export { TestWorkspaces } from './workspaces.ts'
 export { conversationSnapshot, workspaceListState } from './fixtures.ts'
 export type { SessionBehaviorOverrides, SessionFixture, Stabilizer } from './fixtures.ts'
+export { makeTranslate } from './translate.ts'
 
 /** Erased register face for the internal root call (the public declare seam holds the typing). */
 type ErasedRegister = (options: object, component: unknown) => () => void

packages/client/test-runtime/src/sessions.ts

@@ -169,7 +169,7 @@ export class TestSessions implements ISessions {
   private readonly channel: SessionProvideChannel
 
   /** Calls observed on the service-level face (open/clear), newest last. */
-  readonly calls: { method: 'open' | 'clear'; args: unknown[] }[] = []
+  readonly calls: { method: 'open' | 'clear' | 'fork'; args: unknown[] }[] = []
 
   /**
    * @param stabilize - the owning runtime's act wrapper.
@@ -392,6 +392,17 @@ export class TestSessions implements ISessions {
     this.list.update((draft) => { draft.current = undefined })
   }
 
+  /**
+   * Recorded fork stub: no child materializes (benches asserting the full
+   * fork flow drive the production service; this face only proves the call).
+   * @param opts - source session id, optional cut anchor, and client title policy.
+   * @returns the source id (no child record is created).
+   */
+  fork(opts: { sessionId: SessionId; atSeq?: number; increaseTitle?: boolean }): Promise<SessionId> {
+    this.calls.push({ method: 'fork', args: [opts] })
+    return Promise.resolve(opts.sessionId)
+  }
+
   /**
    * The session face of a fixture (typed view for assertions; fixture
    * behavior methods are grafted onto it).

packages/client/test-runtime/src/translate.ts

@@ -0,0 +1,32 @@
+/**
+ * Test double of the locale lookup chain: a translate stub over plain
+ * dictionaries, mirroring LocaleService's resolution order (first dictionary
+ * that owns the key wins, then the key itself stays visible) and its
+ * `{name}` template interpolation. Specs stub the framework-injected `t`
+ * seat with `makeTranslate(zh, commonZh)` instead of re-implementing the
+ * chain per suite.
+ */
+
+/**
+ * Build a translate stub resolving through `dicts` in order (namespace
+ * first, then the shared common vocabulary), falling back to the key.
+ * @param dicts - dictionaries consulted in order.
+ * @returns the translate function (assignable to any `XxxProps['t']` seat).
+ */
+export function makeTranslate(
+  ...dicts: readonly Record<string, string>[]
+): (key: string, params?: Record<string, unknown>) => string {
+  return (key, params) => {
+    let template = key
+    for (const dict of dicts) {
+      const hit = dict[key]
+      if (hit !== undefined) {
+        template = hit
+        break
+      }
+    }
+    if (!params) return template
+    return template.replace(/\{(\w+)\}/g, (match, name: string) =>
+      name in params ? String(params[name]) : match)
+  }
+}

packages/client/test-runtime/tests/runtime.spec.tsx

@@ -201,7 +201,7 @@ describe('sessions', () => {
     await runtime.dispose()
   })
 
-  it('records service-face calls; open() moves the selection and clear() empties it', async () => {
+  it('records service-face calls; open() moves selection, clear() empties it, and fork() echoes the source', async () => {
     const runtime = await runtimeWithFrame()
     await runtime.sessions.add({ id: 's1' })
     await runtime.sessions.add({ id: 's2' })
@@ -211,9 +211,13 @@ describe('sessions', () => {
     runtime.sessions.clear()
     await runtime.flush()
     expect(runtime.sessions.list.getSnapshot().current).toBeUndefined()
+    await expect(runtime.sessions.fork({
+      sessionId: 's1' as SessionId, atSeq: 7, increaseTitle: true,
+    })).resolves.toBe('s1')
     expect(runtime.sessions.calls).toEqual([
       { method: 'open', args: ['s1'] },
       { method: 'clear', args: [] },
+      { method: 'fork', args: [{ sessionId: 's1', atSeq: 7, increaseTitle: true }] },
     ])
     await runtime.dispose()
   })

packages/client/ui-command/package.json

@@ -25,6 +25,7 @@
   "dshClient": {
     "inject": [
       "@deepseek-ai/dsh-client-runtime",
+      "@deepseek-ai/dsh-client-locale",
       "@deepseek-ai/dsh-client-ui-slash",
       "@deepseek-ai/dsh-client-ui-conversation"
     ],
@@ -40,6 +41,7 @@
   },
   "peerDependencies": {
     "@deepseek-ai/dsh-client-connection": "^0.0.1",
+    "@deepseek-ai/dsh-client-locale": "^0.0.1",
     "@deepseek-ai/dsh-client-runtime": "^0.0.1",
     "@deepseek-ai/dsh-client-ui-conversation": "^0.0.1",
     "@deepseek-ai/dsh-client-ui-primitives": "^0.0.1",
@@ -51,7 +53,9 @@
   },
   "devDependencies": {
     "@deepseek-ai/dsh-client-connection": "workspace:^",
+    "@deepseek-ai/dsh-client-locale": "workspace:^",
     "@deepseek-ai/dsh-client-runtime": "workspace:^",
+    "@deepseek-ai/dsh-client-test-runtime": "workspace:^",
     "@deepseek-ai/dsh-client-ui-conversation": "workspace:^",
     "@deepseek-ai/dsh-client-ui-primitives": "workspace:^",
     "@deepseek-ai/dsh-client-ui-slash": "workspace:^",

packages/client/ui-command/src/client/PopupSelectView.tsx

@@ -13,6 +13,7 @@ import { useEffect, useRef } from 'react'
 import { useSyncExternalStore } from 'react'
 import clsx from 'clsx'
 import { IconCheckOutline16, useAnchoredMaxHeight } from '@deepseek-ai/dsh-client-ui-primitives'
+import type { PropsLocale } from '@deepseek-ai/dsh-client-ui-slots'
 import { filterOptions } from './popup.ts'
 import type { PopupSelectController } from './popup.ts'
 import css from './PopupSelectView.module.css'
@@ -26,12 +27,15 @@ export interface PopupSelectInjected {
   popup: PopupSelectController
 }
 
+/** Full shell props: injected face + the locale seat. */
+export type PopupSelectViewProps = PopupSelectInjected & PropsLocale<'command'>
+
 /**
  * Render the popupSelect shell overlay entry.
- * @param props - injected face: the session's shell controller.
+ * @param props - injected face: the session's shell controller; `t` rides the standard locale seat.
  * @returns the select card while open; null while closed.
  */
-export function PopupSelectView({ popup }: PopupSelectInjected) {
+export function PopupSelectView({ popup, t }: PopupSelectViewProps) {
   const state = useSyncExternalStore(
     fn => popup.state.subscribe(fn),
     () => popup.state.getSnapshot(),
@@ -103,15 +107,15 @@ export function PopupSelectView({ popup }: PopupSelectInjected) {
       ref={cardRef}
       className={css.card}
       style={{ maxHeight }}
-      aria-label={`/${String(state.command)} options`}
+      aria-label={t('overlay.aria', { command: String(state.command) })}
       onKeyDown={onKeyDown}
     >
       <input
         ref={searchRef}
         className={css.search}
         type="text"
-        placeholder="Search…"
-        aria-label="Filter options"
+        placeholder={t('search.placeholder')}
+        aria-label={t('search.aria')}
         value={state.search}
         readOnly={state.submitting}
         onChange={(ev) => { popup.setSearch(ev.currentTarget.value) }}
@@ -120,15 +124,15 @@ export function PopupSelectView({ popup }: PopupSelectInjected) {
         <div className={css.error} role="alert">
           <span className={css.errorText}>{state.error}</span>
           {state.status === 'failed' && (
-            <button type="button" className={css.retry} onClick={() => { popup.retry() }}>Retry</button>
+            <button type="button" className={css.retry} onClick={() => { popup.retry() }}>{t('retry')}</button>
           )}
         </div>
       )}
-      {state.status === 'pending' && <div className={css.status}>Loading options…</div>}
-      {state.submitting && <div className={css.status}>Applying…</div>}
-      {state.status === 'ready' && rows.length === 0 && <div className={css.status}>No options</div>}
+      {state.status === 'pending' && <div className={css.status}>{t('status.loading')}</div>}
+      {state.submitting && <div className={css.status}>{t('status.applying')}</div>}
+      {state.status === 'ready' && rows.length === 0 && <div className={css.status}>{t('status.empty')}</div>}
       {state.status === 'ready' && (
-        <div role="listbox" aria-label={`/${String(state.command)} matches`} className={css.viewport}>
+        <div role="listbox" aria-label={t('listbox.aria', { command: String(state.command) })} className={css.viewport}>
           {rows.map((option, index) => (
             <div
               key={option.id}

packages/client/ui-command/src/client/index.ts

@@ -10,19 +10,23 @@ import type { ClientContext } from '@deepseek-ai/dsh-client-runtime/client'
 // key's owner) into this program so the overlay registration below typechecks
 // against the real declaration — no runtime edge to ui-conversation.
 import type {} from '@deepseek-ai/dsh-client-ui-conversation/client'
+// Type-only: pulls the locale plugin's Context merge (ctx.locale).
+import type {} from '@deepseek-ai/dsh-client-locale/client'
 import { CommandService } from './service.ts'
 import type { PopupSelectInjected } from './PopupSelectView.tsx'
 import { PopupSelectView } from './PopupSelectView.tsx'
+import { en, zh, type CommandKey } from './locales.ts'
 
 export { CommandService } from './service.ts'
 export { CommandDirectory } from './directory.ts'
 export type { CommandDescriptor, DirectoryStatus } from './directory.ts'
 export { filterOptions, PopupSelectController } from './popup.ts'
 export type { PopupSelectDeps, PopupSpec, PopupState, TokenSegment } from './popup.ts'
-export type { PopupSelectInjected } from './PopupSelectView.tsx'
+export type { PopupSelectInjected, PopupSelectViewProps } from './PopupSelectView.tsx'
 export type {
   CommandContribution, CommandDecoration, CommandServiceContract, CommandUiSpec, SelectOption,
 } from './contract.ts'
+export type { CommandKey } from './locales.ts'
 
 declare module 'cordis' {
   interface Context {
@@ -30,8 +34,18 @@ declare module 'cordis' {
   }
 }
 
-/** Required services: the '/' source registry plus the scope + wire faces the service reads. */
-export const inject = ['slash', 'sessions', 'connection']
+declare module '@deepseek-ai/dsh-client-ui-slots' {
+  interface LocaleNamespaceMap {
+    /** The popupSelect shell's copy. */
+    command: CommandKey
+  }
+}
+
+/** Dictionary namespace owned by this plugin. */
+const NS = 'command'
+
+/** Required services: the '/' source registry plus the scope + wire faces the service reads, and the copy's locale registry. */
+export const inject = ['slash', 'sessions', 'connection', 'locale']
 
 /**
  * Client plugin body: mount the service, then register the popupSelect shell
@@ -39,6 +53,7 @@ export const inject = ['slash', 'sessions', 'connection']
  * @param ctx - client root context.
  */
 export function apply(ctx: ClientContext): void {
+  ctx.effect(() => ctx.locale.register(NS, { zh, en }), 'ui-command: dictionaries')
   ctx.plugin(CommandService)
   // Conditional mount, same seam as ui-slash's MenuView registration:
   // 'conversation.input.overlay' is declared by the conversation composer
@@ -51,6 +66,7 @@ export function apply(ctx: ClientContext): void {
       name: 'conversation.input.overlay',
       id: 'command-popup',
       order: 1,
+      locale: NS,
       inject: (sessionId): PopupSelectInjected => {
         const actx = sessions.scope(sessionId)
         if (actx === undefined) throw new Error(`ui-command: session "${String(sessionId)}" resolved no scope`)

packages/client/ui-command/src/client/locales.ts

@@ -0,0 +1,26 @@
+/** `command` namespace dictionaries (the popupSelect shell's copy). */
+
+/** Simplified Chinese dictionary (the key-set source of truth). */
+export const zh = {
+  'search.placeholder': '搜索…',
+  'search.aria': '筛选选项',
+  'status.loading': '正在加载选项…',
+  'status.applying': '正在应用…',
+  'status.empty': '无选项',
+  'overlay.aria': '/{command} 选项',
+  'listbox.aria': '/{command} 匹配项',
+} satisfies Record<string, string>
+
+/** The command namespace key union. */
+export type CommandKey = keyof typeof zh
+
+/** English dictionary, checked complete against the zh key set. */
+export const en = {
+  'search.placeholder': 'Search…',
+  'search.aria': 'Filter options',
+  'status.loading': 'Loading options…',
+  'status.applying': 'Applying…',
+  'status.empty': 'No options',
+  'overlay.aria': '/{command} options',
+  'listbox.aria': '/{command} matches',
+} satisfies Record<CommandKey, string>

packages/client/ui-command/tests/browser-plugin.spec.ts

@@ -13,6 +13,7 @@ import type { SessionId } from '@deepseek-ai/dsh-client-runtime/client'
 import type { SlashSource } from '@deepseek-ai/dsh-client-ui-slash/client'
 import type { CommandServiceContract } from '../src/client/contract.ts'
 import type { PopupSelectInjected } from '../src/client/PopupSelectView.tsx'
+import { LocaleService } from '@deepseek-ai/dsh-client-locale/client'
 import { apply, CommandService, inject } from '../src/client/index.ts'
 
 const sid = (k: string): SessionId => k as SessionId
@@ -41,6 +42,7 @@ async function bench() {
     },
   })
   ctx.provide('conversation', {})
+  ctx.provide('locale', new LocaleService(ctx))
   const fiber = ctx.plugin({ inject: [...inject], apply })
   await fiber.await()
   const mint = (key: string) => {
@@ -53,7 +55,7 @@ async function bench() {
 
 describe('apply', () => {
   it('declares the services it binds', () => {
-    expect(inject).toEqual(['slash', 'sessions', 'connection'])
+    expect(inject).toEqual(['slash', 'sessions', 'connection', 'locale'])
   })
 
   it('mounts ctx.command, registers the source and the overlay entry, and folds up on disposal', async () => {

packages/client/ui-command/tests/popup-view.spec.tsx

@@ -14,6 +14,12 @@ import type { SelectOption } from '../src/client/contract.ts'
 import type { PopupSpec, TokenSegment } from '../src/client/popup.ts'
 import { PopupSelectController } from '../src/client/popup.ts'
 import { PopupSelectView } from '../src/client/PopupSelectView.tsx'
+import { makeTranslate } from '@deepseek-ai/dsh-client-test-runtime'
+import { zh as commonZh } from '@deepseek-ai/dsh-client-locale/src/locales/zh.ts'
+import { zh } from '../src/client/locales.ts'
+
+// The framework-injected t seat, stubbed over the zh dictionaries (the default locale).
+const t: Parameters<typeof PopupSelectView>[0]['t'] = makeTranslate(zh, commonZh)
 
 // jsdom has no scrollIntoView; the view calls it on the highlighted row.
 const scrollIntoView = vi.fn()
@@ -47,12 +53,12 @@ async function mountOpen(overrides: Partial<PopupSpec<string>> = {}, consumeResu
   const consume = vi.fn((_segment: TokenSegment) => consumeResult)
   const focusComposer = vi.fn()
   const popup = new PopupSelectController<string>({ consume, focusComposer })
-  const view = render(<PopupSelectView popup={popup} />)
+  const view = render(<PopupSelectView popup={popup} t={t} />)
   await act(async () => {
     popup.open('theme', spec(overrides), 'ctx-A', SEGMENT)
     await Promise.resolve()
   })
-  return { popup, view, consume, focusComposer, search: screen.getByRole('textbox', { name: 'Filter options' }) }
+  return { popup, view, consume, focusComposer, search: screen.getByRole('textbox', { name: '筛选选项' }) }
 }
 
 function rowLabels(): string[] {
@@ -62,13 +68,13 @@ function rowLabels(): string[] {
 describe('PopupSelectView', () => {
   it('renders null while closed, opens with focus in the search input', async () => {
     const popup = new PopupSelectController<string>({ consume: () => true, focusComposer: () => {} })
-    const view = render(<PopupSelectView popup={popup} />)
+    const view = render(<PopupSelectView popup={popup} t={t} />)
     expect(view.container.childElementCount).toBe(0)
     await act(async () => {
       popup.open('theme', spec(), 'ctx-A', SEGMENT)
       await Promise.resolve()
     })
-    const search = screen.getByRole('textbox', { name: 'Filter options' })
+    const search = screen.getByRole('textbox', { name: '筛选选项' })
     expect(document.activeElement).toBe(search)
     expect(rowLabels()).toEqual(['Dark', 'Light', 'Sepia'])
   })
@@ -82,7 +88,7 @@ describe('PopupSelectView', () => {
     expect(options).toHaveBeenCalledTimes(1)
     act(() => { fireEvent.change(search, { target: { value: 'zzz' } }) })
     expect(screen.queryByRole('option')).toBeNull()
-    expect(screen.queryByText('No options')).not.toBeNull()
+    expect(screen.queryByText('无选项')).not.toBeNull()
   })
 
   it('ArrowUp/Down move the filtered highlight; ArrowLeft/Right are left to the native caret', async () => {
@@ -110,13 +116,13 @@ describe('PopupSelectView', () => {
   it('caps the card height at the design maximum when the composer sits low enough', async () => {
     vi.spyOn(Element.prototype, 'getBoundingClientRect').mockReturnValue({ bottom: 800 } as DOMRect)
     await mountOpen()
-    expect(screen.getByLabelText('/theme options').style.maxHeight).toBe('320px')
+    expect(screen.getByLabelText('/theme 选项').style.maxHeight).toBe('320px')
   })
 
   it('clamps the card height to the space above the composer minus the safe margin', async () => {
     vi.spyOn(Element.prototype, 'getBoundingClientRect').mockReturnValue({ bottom: 200 } as DOMRect)
     await mountOpen()
-    expect(screen.getByLabelText('/theme options').style.maxHeight).toBe('188px')
+    expect(screen.getByLabelText('/theme 选项').style.maxHeight).toBe('188px')
   })
 
   it('Enter selects the highlighted row: onSelect, consume, close, focusComposer', async () => {
@@ -148,7 +154,7 @@ describe('PopupSelectView', () => {
     const onSelect = vi.fn(() => new Promise<void>((resolve) => { release = resolve }))
     const { search, consume } = await mountOpen({ onSelect })
     await act(async () => { fireEvent.keyDown(search, { key: 'Enter' }) })
-    expect(screen.queryByText('Applying…')).not.toBeNull()
+    expect(screen.queryByText('正在应用…')).not.toBeNull()
     expect((search as HTMLInputElement).readOnly).toBe(true)
     await act(async () => {
       fireEvent.keyDown(search, { key: 'Enter' })
@@ -162,7 +168,7 @@ describe('PopupSelectView', () => {
     expect(consume).toHaveBeenCalledTimes(1)
   })
 
-  it('a failed options load shows the error with a Retry button that reloads', async () => {
+  it('a failed options load shows the error with a retry button that reloads', async () => {
     let attempts = 0
     await mountOpen({
       options: () => {
@@ -172,7 +178,7 @@ describe('PopupSelectView', () => {
     })
     expect(screen.getByRole('alert').textContent).toContain('directory down')
     await act(async () => {
-      fireEvent.click(screen.getByRole('button', { name: 'Retry' }))
+      fireEvent.click(screen.getByRole('button', { name: '重试' }))
       await Promise.resolve()
     })
     expect(attempts).toBe(2)
@@ -183,7 +189,7 @@ describe('PopupSelectView', () => {
     const { search, consume } = await mountOpen({ onSelect: () => Promise.reject(new Error('host rejected')) })
     await act(async () => { fireEvent.keyDown(search, { key: 'Enter' }) })
     expect(screen.getByRole('alert').textContent).toContain('host rejected')
-    expect(screen.queryByRole('button', { name: 'Retry' })).toBeNull()
+    expect(screen.queryByRole('button', { name: '重试' })).toBeNull()
     expect(consume).not.toHaveBeenCalled()
     expect(screen.getAllByRole('option').length).toBe(3)
   })

packages/client/ui-command/tsconfig.json

@@ -14,6 +14,9 @@
     {
       "path": "../connection"
     },
+    {
+      "path": "../locale"
+    },
     {
       "path": "../runtime"
     },

packages/client/ui-conversation/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-conversation/README.md
-README.md: 06fd6b963639390164582e70476b6a80f189bc61
-README.zh.md: 41047d563f5541aaddc87bc7b448f678538ef91a
+README.md: b4b1e5653705c76bac3e0227e6df77143a11cbbe
+README.zh.md: 74e0f3dc0ebaf74e2e065c6b88f3a30fce94b391

packages/client/ui-conversation/README.md

@@ -10,6 +10,8 @@ The view ring IS a slot: the conversation registration declares the `'conversati
 
 Approvals take over the composer through the chain this package declares: `ApprovalPanel` registers as a selector-routed `'conversation.composer'` entry (the ui-question pattern) and occupies the composer in place of the InputBar while an approval wait is pending (amber strip, justification headline, paired command line from the running call's args, one-shot refuse/allow). The `PendingApproval` domain face in `contract/slots.ts` owns the wire encoding — the `ApprovalResponsePayload` value with the audit correlation — over the runtime's `PendingWait` carrier; the broadcast `approval/resolved` frame settles the wait and restores the composer. The sidebar mirrors the blocked state through the manager-tracked `waitingApproval` list bit (lit for uninstantiated sessions too), which outranks the running ring until the question resolves. Pending waits leave the message flow entirely: questions (ui-question) and approvals (ApprovalPanel) both answer through the composer takeover, so no display-only placeholder card remains. The composer's bottom-row Access seat mounts `PermissionSelect`, fed by the host-computed `permissions` projection through the standard-kit `useProjection` (key absence hides the chip); the chip opens a Menu-primitive dropdown whose kebab-case preset names render as title-case labels (the `/permission` popup's display transform twin), and a pick submits the `/permission <preset>` command line through the bar's injected `command` callback.
 
+Logged non-user messages render as a default-collapsed `上下文注入` disclosure. It shares the Tool calls header geometry and interaction with `ToolRow` through the package-internal `DisclosureRow`, while retaining context semantics: the expanded 141px scrollport shows bounded inline JSON for both `content` and `source`, and no tool state, summary, or keyed toolview dispatch is synthesized ([decision](../../../.agents/notes/implemented/feature/2026-07-30-web-context-injection-disclosure.md)).
+
 Generic tool rows classify the built-in bash, read, search, write, edit, and run_code names into dedicated visual variants. The filesystem variants render the edit icon and a path summary; that path is a hover-underline link that opens the file with the host OS default application (`host.openPath`, relative paths resolve against the session cwd). Tool rows are not whole-row click targets and do not open the details panel. The code variant summarizes with the model-authored `description` and expands to the program itself; its logged sub-dispatches render as always-visible nested rows through the SAME keyed toolview hole (custom registrations and the GenericToolCard fallback apply to sub-rows unchanged). Cordis lifecycle tools reuse those generic variants while presenting `Inspect`, `Mount temporary Plugin`, and `Unmount temporary Plugin` with a shared Cordis accent; mount keeps the code variant's expandable source rendering.
 
 A tool call declaring the `terminal` render intent renders its command output inline, at both conversation render sites, through ui-primitives' `TerminalBlock`. `contract/terminal-card-model.ts` is the single derivation from the snapshot's `callView`/`resultView` pair, so the sites cannot disagree about a command, its cwd, or its exit status; it yields null — the generic path — for any other card tag, including one this client version does not know. Both sites therefore also show the card's run-state dot, which is the same `StateDot` semantic a tool row's leading icon carries, so a row and its own card always agree about one command's state. A multi-line command gets one prompt row per line, with the dot marking the call once on the first row — the exit status is the whole call's, so a dot per line would claim a per-line outcome bash does not report. The keyed `BashRow` carries the card resident below its summary row; since tool rows are no longer details-panel click targets, the card's copy and expand controls are the row's only interactions. The render-site fallback row keeps the card behind its existing expand control. Rows cap at `CHAT_TERMINAL_MAX_LINES` (8) against the panel's 16, which is what keeps a summary surface bounded — the panel stays the single-call reading surface. Inline output is licensed for this intent alone; a generic tool's content remains panel-only ([decision](../../../.agents/notes/implemented/feature/2026-07-28-web-terminal-card.md)).
@@ -18,9 +20,11 @@ Tool rows are slots too — the standalone tool ring (`ToolViewRegistry`/`ctx.to
 
 The todo surfaces are two registrations over that shape, both plain registrant plugins with `inject: ['slots', 'conversation']`. `TodoRow` takes the `'conversation.chat.toolview'` key `todo_write` and summarizes what the call attempted (`<done>/<total> 已完成 · <active item>` parsed from its args, falling back to the generic summary on malformed or wrongly-shaped model JSON, and keeping the generic dot for non-ok execution states so a cancelled call never reads as a completed update). `TodoDock` takes the `'conversation.input.dock'` list slot at `order: -1` — above the queue rows — and is the plan strip: it reads the host-computed `todos` projection via `useProjection` (standing plan: latest `todo/write` with no later `turn/start`) and renders `TodoPanel`, which takes the plain list, hides itself while the list is empty, and starts collapsed as a header of title plus `"<done>/<total> tasks · <n> in progress"` (status glyphs are the figma check / progress / dashed-pending set). The dock adapter owns the selection so the panel stays a pure function of its props; the standing list lives here rather than in the row so the row stays one line. Anything the input-zone composer chain hides (a `conversation.composer` takeover such as ui-question's) hides the whole dock, this strip included.
 
+`QueueDock` is the terminal input-dock entry at `order: 20`. It hides while empty, renders one pending row directly, and defaults two or more rows to a collapsed `"<n> 条排队消息"` header whose button expands or collapses the complete list. The header exposes `aria-expanded` and `aria-controls`; the expanded list scrolls within a 180px height bound. An active edit or mutation keeps its rows visible, and emptying the queue restores the collapsed default for the next queue. Each visible row remains a single-line preview with its exact-occurrence edit and delete actions.
+
 Per-session UI state for selection and the active view lives in the declared chat store (`stores.ts` `createChatStore`); the InputHub owns the composer state machine and mirrors its draft into that store for persistence. Apply passes one store handle to the strict session subtree, chat view, and details registrations, so each session shares one instance and the framework owns its lifecycle. Components are pure: the framework standard kit supplies `useSession`/`sessionId`, global `useSessions`/`useWorkspaces`, and the input machine's `useInput`/`inputActions`; store faces and inject factories supply the remaining state and callbacks.
 
-The composer bar declares session-scoped single seats for `'conversation.input.plan'` (right of the local access-mode control) and `'conversation.input.model'` (immediately before the pending indicator and send/stop button), plus list slots for overlay, dock, left, and right input extensions. Feature packages own each control and its state; ui-conversation supplies placement, the `locked` owner prop, and the standard slot shares. While the `plan` projection's effective target is plan mode, InputBar swaps its textarea placeholder to the plan-task wording, localized through the `command.hint` locale namespace this package registers and shared verbatim with the claimed `/plan` command hint (a host-folded value read through the standard-kit `useProjection`; owner-supplied placeholders win). A pending composer takeover remains mounted when another conversation view is active so the blocked agent can still receive its answer; without a pending interaction, the active-session composer belongs to Chat. The composer-bar slot itself is `session-maybe`: with no current session the same bar renders inert (machine faces absent, `disabled` owner prop) instead of swapping in a parallel disabled tree, so the textarea DOM survives the workspace pick; the strict-session control seats simply stay empty until a session exists.
+The composer bar declares session-scoped single seats for `'conversation.input.plan'` (right of the local access-mode control) and `'conversation.input.model'` (immediately before the pending indicator and send/stop button), plus list slots for overlay, dock, left, and right input extensions. Feature packages own each control and its state; ui-conversation supplies placement, the `locked` owner prop, and the standard slot shares. While the `plan` projection's effective target is plan mode, InputBar swaps its textarea placeholder to the plan-task wording, localized through the `conversation` locale namespace this package registers (the `placeholder.plan` / `hint.plan` keys) and shared verbatim with the claimed `/plan` command hint (a host-folded value read through the standard-kit `useProjection`; owner-supplied placeholders win). A pending composer takeover remains mounted when another conversation view is active so the blocked agent can still receive its answer; without a pending interaction, the active-session composer belongs to Chat. The composer-bar slot itself is `session-maybe`: with no current session the same bar renders inert (machine faces absent, `disabled` owner prop) instead of swapping in a parallel disabled tree, so the textarea DOM survives the workspace pick; the strict-session control seats simply stay empty until a session exists.
 
 `src/client/` is organized for the future package split: `contract/` is the sole inter-domain shared face (`slots.ts` slot declarations + composed slot props including the tool-row contract, `views.ts` shared primitives, `tool-call-model.ts`); the `skeleton/`, `chat/`, and `toolviews/` (sample registrants) domain directories import contract files and never each other; `apply.ts` is the only assembly point allowed to import all three domains. The `/client` export surface is the contract only — `apply`/`inject`, the two service classes, and the `contract/` type families; implementation components (skeleton, chat rows) and the store factory stay internal and reach the page exclusively through apply's slot registrations (tests take them via the `./src/*` subpath).
 
@@ -36,7 +40,7 @@ None; this package neither assembles nor sends a provider request.
 
 - **Stats-line durations cover the in-window flow only** — LLM and tool wall times fold the snapshot's assistant `timing` and tool call/result pairs, so nodes outside the loaded event window (older history) are not counted.
 - **Details panel is the minimal form and currently has no entry point** — selected call args/result raw display; the Input/Output/Metadata switch, Prev/Next stepping, and See-in-trajectory deep link are deferred. Tool rows stopped being details-panel click targets and nothing replaced that gesture, so `ChatViewInjected.openDetails` is implemented but uncalled and the panel (including its terminal card) is unreachable in the assembled application; its rendering stays covered by mounting it with a selection directly.
-- **Assistant per-message paging is a reserved slot** — drawn in the design, not implemented. The finalized content IconActions row (copy / branch / clock) ships under text output only; branch remains a chrome stub.
+- **Assistant per-message paging is a reserved slot** — drawn in the design, not implemented. The finalized content IconActions row (copy / branch / clock) ships under the last content-text assistant of each turn only; mid-turn narration and Think-only nodes stay chrome-free. Branch forks through the turn containing that message, increments the inherited title on the client, and then opens the child, while a fork or rename failure leaves the source selected.
 - **The sparkle icon for the others tool row is a hand-drawn approximation** — the design glyph's vector geometry is not exportable locally; promotion into ui-primitives waits on an exact export.
 - **The approval panel's "Always allow this type" is deferred** — durable grants need a grant-storage design; only allow-once/reject answer today.
 - **TodoPanel truncates long item text to one ellipsized line** — the figma strip has no wrap or expand affordance; full text is not readable inline.

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

@@ -8,6 +8,8 @@
 
 视图环本身就是 slot：会话注册声明 `'conversation.view'` 列表 slot（Session scope），并将其列在 `children` 表中；ConversationRoot 通过 renderSlot share 渲染活跃配置项（`only: <active id>`）；视图标签页从环账本的注册选项（`id`／`order`／`label`）投影而来。聊天视图是该包自身的环配置项；其他插件（ui-trajectory）通过普通的 `ctx.slots.register` 贡献标签页。先前包内的视图注册表（`registerView`／`ViewEntry`／`ConversationViewMap` 及 chrome 附加表）已退役，逐视图 chrome 则被拆入视图组件自身。
 
+已记录的非用户消息渲染为默认折叠的 `上下文注入` 展开项。它通过包内部的 `DisclosureRow` 与 `ToolRow` 共享 Tool calls 标题栏的几何与交互，同时保留上下文语义：展开后的 141px 滚动区会以内联 JSON 的形式有界展示 `content` 和 `source`，且不会合成工具状态、摘要或键控 toolview 分发（[决策](../../../.agents/notes/implemented/feature/2026-07-30-web-context-injection-disclosure.md)）。
+
 通用工具行把内置的 bash、read、search、write、edit 和 run_code 名称归入专用视觉变体。文件系统变体会渲染 edit 图标和路径摘要；该路径是悬停下划线链接，点击后通过宿主操作系统的默认应用打开文件（`host.openPath`，相对路径相对会话 cwd 解析）。工具行不再是整行点击目标，也不会打开 details 面板。code 变体以模型撰写的 `description` 作摘要，展开后显示程序本身；其已记录的子调用经由同一个键控 toolview 空位渲染为始终可见的嵌套行（自定义注册和 GenericToolCard fallback 原样适用于子行）。Cordis 生命周期工具复用这些通用变体，同时以统一的 Cordis 强调色呈现 `Inspect`、`Mount temporary Plugin` 和 `Unmount temporary Plugin`；mount 行保留 code 变体的可展开源码渲染。
 
 声明 `terminal` 渲染意图的工具调用，会在两个对话渲染点上都通过 ui-primitives 的 `TerminalBlock` 内联渲染其命令输出。`contract/terminal-card-model.ts` 是从快照的 `callView`／`resultView` 对推导的唯一位置，因此两个渲染点不可能在命令、cwd 或退出状态上产生分歧；对任何其他 card 标签——包括当前客户端版本不认识的标签——它返回 null，落回通用路径。因此两个渲染点也都显示卡片的运行状态点，它与工具行行首图标承载同一套 `StateDot` 语义，所以一行与其自身的卡片对同一条命令的状态总是一致。多行命令的每一行各占一个提示行，状态点只在第一行为整次调用标记一次——退出状态属于整次调用，因此每行一枚就会声称一个 bash 并不报告的逐行结果。键控的 `BashRow` 把卡片常驻在摘要行下方；由于工具行已不再是详情面板的点击目标，卡片的复制与展开控件就是该行唯一的交互。渲染点兜底行则保持其既有的展开控件。行的上限是 `CHAT_TERMINAL_MAX_LINES`（8），面板为 16，正是这一点让摘要面保持有界——面板仍是单次调用的阅读面。内联输出只对该意图开放；通用工具的内容仍然只在面板中呈现（[决策](../../../.agents/notes/implemented/feature/2026-07-28-web-terminal-card.md)）。
@@ -18,9 +20,11 @@
 
 todo 两个面就是在该形状上的两个注册项，都是普通注册方插件，`inject: ['slots', 'conversation']`。`TodoRow` 占用 `'conversation.chat.toolview'` 的 `todo_write` key，摘要该次调用「试图写入」的内容（从其 args 解析出 `<已完成>/<总数> 已完成 · <进行中条目>`；模型 JSON 残缺或形状不对时回落到通用摘要；非 ok 执行状态保留通用状态点，使被取消的调用绝不读成一次已完成的更新）。`TodoDock` 以 `order: -1` 占用 `'conversation.input.dock'` 列表 slot（位于队列行之上），是计划条：它经 `useProjection` 读取 host 计算的 `todos` 投影（站立计划：其后没有更晚 `turn/start` 的最近一次 `todo/write`）并渲染 `TodoPanel`，后者接收纯列表，在列表为空时自我隐藏；列表非空时面板初始折叠，表头显示标题加 `"<已完成>/<总数> tasks · <n> in progress"`（状态图标为 figma 的勾选／进行中／虚线未开始一组）。选取由 dock 适配器负责，因此面板保持为其 props 的纯函数；站立列表放在此处而非行内，行才能保持单行。输入区 composer 链隐藏的一切（例如 ui-question 对 `conversation.composer` 的接管）也会隐藏整个 dock，包括这条计划条。
 
+`QueueDock` 是 `order: 20` 的末端 input-dock 条目。队列为空时隐藏；只有一个待处理项时直接渲染该行；存在两个或更多待处理项时，默认收起为 `"<n> 条排队消息"` 表头，其按钮可展开或收起完整列表。表头暴露 `aria-expanded` 和 `aria-controls`；展开后的列表以 180px 为高度上限，并可滚动。存在进行中的编辑或变更时，列表行会保持可见；队列清空后，下一次出现队列时会恢复默认收起状态。每条可见行仍是单行预览，并提供针对精确单次入队项的编辑和删除操作。
+
 逐 Session UI 状态中的选择与活跃视图位于已声明的聊天 store（`stores.ts` `createChatStore`）中；InputHub 拥有输入区状态机，并将草稿镜像到该 store 以便持久化。apply 将同一个 store handle 传给严格限定于会话的子树、聊天视图和详情注册，因此每个会话内共享一个实例，框架拥有其生命周期。组件保持纯粹：框架标准工具包提供 `useSession`／`sessionId`、全局 `useSessions`／`useWorkspaces`，以及输入状态机的 `useInput`／`inputActions`；store 表层与 inject factory 提供其余状态和回调。
 
-输入栏为 `'conversation.input.plan'`（位于本地 access 模式控件右侧）和 `'conversation.input.model'`（渲染在 pending 指示器与发送／停止按钮之前）声明会话作用域的单实例 seat，并为 overlay、dock、left 和 right 输入扩展声明列表 slot。各功能包拥有相应控件及其状态；ui-conversation 提供放置位置、`locked` owner prop 和标准 slot share。当 `plan` 投影的有效目标为 plan mode 时，InputBar 将文本框 placeholder 切换为 plan 任务措辞，经本包注册的 `command.hint` locale 命名空间本地化，并与已认领 `/plan` 命令的提示逐字共用同一份文案（经标准套件 `useProjection` 读取的 host 折叠值；owner 提供的 placeholder 优先）。另一个会话视图活跃时，待处理的 composer 接管仍保持挂载，使被阻塞的 agent（智能体）仍能收到回答；没有待处理交互时，活跃会话的 composer 归 Chat 所有。composer bar 坑位本身为 `session-maybe`：没有当前会话时，同一个 bar 以惰性态渲染（machine face 缺席、`disabled` owner prop），而不是换入一棵平行的 disabled 树，因此 textarea DOM 在选定 workspace 的切换中得以存活；严格会话作用域的控件 seat 在会话存在之前保持为空。
+输入栏为 `'conversation.input.plan'`（位于本地 access 模式控件右侧）和 `'conversation.input.model'`（渲染在 pending 指示器与发送／停止按钮之前）声明会话作用域的单实例 seat，并为 overlay、dock、left 和 right 输入扩展声明列表 slot。各功能包拥有相应控件及其状态；ui-conversation 提供放置位置、`locked` owner prop 和标准 slot share。当 `plan` 投影的有效目标为 plan mode 时，InputBar 将文本框 placeholder 切换为 plan 任务措辞，经本包注册的 `conversation` locale 命名空间（`placeholder.plan` / `hint.plan` 键）本地化，并与已认领 `/plan` 命令的提示逐字共用同一份文案（经标准套件 `useProjection` 读取的 host 折叠值；owner 提供的 placeholder 优先）。另一个会话视图活跃时，待处理的 composer 接管仍保持挂载，使被阻塞的 agent（智能体）仍能收到回答；没有待处理交互时，活跃会话的 composer 归 Chat 所有。composer bar slot 本身为 `session-maybe`：没有当前会话时，同一个 bar 以不可交互状态渲染（machine face 均缺席、`disabled` owner prop），而不是换入一棵平行的 disabled 树，因此选择 workspace 时 textarea DOM 不会被销毁；严格会话作用域的控件 seat 在会话存在之前保持为空。
 
 `src/client/` 按未来的包拆分组织：`contract/` 是唯一的跨领域共享表层（`slots.ts` slot 声明 + 组合后的 slot props，包括工具行契约、`views.ts` 共享原语、`tool-call-model.ts`）；`skeleton/`、`chat/` 和 `toolviews/`（示例注册方）领域目录只导入 contract 文件，彼此绝不导入；`apply.ts` 是唯一允许导入全部三个领域的组装点。`/client` 导出表层只包含契约：`apply`／`inject`、两个服务类和 `contract/` 类型家族；实现组件（骨架、聊天行）与 store factory 保持内部状态，只能通过 apply 的 slot 注册到达页面（测试通过 `./src/*` 子路径获取它们）。
 
@@ -34,9 +38,9 @@ todo 两个面就是在该形状上的两个注册项，都是普通注册方插
 
 ## 已知限制与暂缓事项
 
-- **统计行的耗时只覆盖窗口内消息流**：LLM 与工具墙钟时间由快照的 assistant `timing` 与工具 call/result 配对折算，落在已加载事件窗口之外的节点（更早的历史）不计入。
+- **统计行的耗时只覆盖窗口内消息流**：LLM（大语言模型）与工具墙钟时间由快照的 assistant `timing` 与工具 call/result 配对折算，落在已加载事件窗口之外的节点（更早的历史）不计入。
 - **详情面板是最小形态，且当前没有入口**：以原始形式显示已选择调用的参数／结果；Input/Output/Metadata 切换、Prev/Next 步进与 See-in-trajectory 深链接暂缓实现。工具行已不再是详情面板的点击目标，且没有任何手势接替它，因此 `ChatViewInjected.openDetails` 虽已实现却无人调用，该面板（含其终端卡片）在组装后的应用中不可达；其渲染仍由直接以选中态挂载它来覆盖。
-- **assistant 逐消息分页是预留 slot**：设计中已有图稿，尚未实现。已定稿的内容 IconActions 行（复制／分支／时钟）只挂在 text 输出下；分支仍是 chrome stub。
+- **assistant 逐消息分页是预留 slot**：设计中已有图稿，尚未实现。已定稿的内容 IconActions 行（复制／分支／时钟）只挂在每个轮次中最后一条带 text 内容的 assistant 下；轮次中间的叙述与纯 Think 节点不带 chrome。分支会 fork 到包含该消息的轮次末尾，在 client 端递增继承标题后打开子会话，而 fork 或改名失败时源会话保持选中。
 - **others 工具行的闪光图标是手绘近似版本**：无法在本地导出设计字形的矢量几何；等到存在精确导出后再将其提升到 ui-primitives。
 - **审批面板的「始终允许此类」暂缓**：持久授权需要授权存储设计；今天只能回答允许一次／拒绝。
 - **TodoPanel 将过长条目截成单行省略号**：figma 条没有换行或展开入口，完整文本无法在行内读完。

packages/client/ui-conversation/src/client/apply.ts

@@ -1,6 +1,6 @@
 /** Registers the conversation components, shared store, and service callbacks. */
 import type { Context } from 'cordis'
-import type { BoundActions } from '@deepseek-ai/dsh-client-ui-slots'
+import { resolveSlotLabel, type BoundActions } from '@deepseek-ai/dsh-client-ui-slots'
 import type { ISessions, SessionId } from '@deepseek-ai/dsh-client-runtime/client'
 import type {} from '@deepseek-ai/dsh-client-ui-layout/client'
 // Type-only: pulls the locale plugin's Context merge (ctx.locale).
@@ -28,6 +28,14 @@ import { queueDockEntry } from './queue/QueueDock.tsx'
 import { ConversationRoot } from './skeleton/ConversationRoot.tsx'
 import { ConversationSession } from './skeleton/ConversationSession.tsx'
 import { DetailsPanel } from './skeleton/DetailsPanel.tsx'
+import { en, NS, zh, type ConversationKey } from './locales.ts'
+
+declare module '@deepseek-ai/dsh-client-ui-slots' {
+  interface LocaleNamespaceMap {
+    /** The conversation surfaces' copy (skeleton, chat view, toolviews, docks). */
+    conversation: ConversationKey
+  }
+}
 
 /** Services required by the conversation plugin. */
 export const inject = ['slots', 'layout', 'sessions', 'workspaces', 'locale']
@@ -68,32 +76,12 @@ export function apply(ctx: Context): void {
   const layout = ctx.layout
   const slots = ctx.slots
 
-  // Command hint locale: friendly placeholder text for claimed commands. The
-  // claimed /plan hint and the plan-mode textarea placeholder share one
-  // string: both describe the same next action.
-  const HINT_NS = 'command.hint'
-  const PLAN_HINT_ZH = '描述你的任务以生成计划'
-  const PLAN_HINT_EN = 'describe your task to generate plan'
-  ctx.effect(() => {
-    const disposers = [
-      ctx.locale.register(HINT_NS, 'zh', {
-        plan: PLAN_HINT_ZH,
-        goal: '输入目标，智能体将持续执行',
-        'goal.active': '当前目标进行中。可输入 edit 修改 / pause 暂停 / resume 继续 / clear 清除',
-        'placeholder.plan': PLAN_HINT_ZH,
-        'placeholder.default': '给智能体发消息',
-      }),
-      ctx.locale.register(HINT_NS, 'en', {
-        plan: PLAN_HINT_EN,
-        goal: 'describe the objective for a long-running task',
-        'goal.active': 'goal active — edit / pause / resume / clear',
-        'placeholder.plan': PLAN_HINT_EN,
-        'placeholder.default': 'Message the agent',
-      }),
-    ]
-    return () => { for (const dispose of disposers) dispose() }
-  }, 'ui-conversation: command hint dictionaries')
-  const translateHint = ctx.locale.bind(HINT_NS)
+  ctx.effect(() => ctx.locale.register(NS, { zh, en }), 'ui-conversation: dictionaries')
+
+  // Registration-time text (the view tab label) reads through the bound
+  // translate as a thunk, so it follows the active locale without
+  // re-registration; components read the standard `t` seat instead.
+  const t = ctx.locale.bind(NS)
 
   // Apply-time construction keeps store identity bound to this fiber.
   const chatStore = createChatStore()
@@ -103,7 +91,7 @@ export function apply(ctx: Context): void {
     for (const entry of slots.entries('conversation.view')) {
       /* v8 ignore next -- unreachable: list registration validates id at load. */
       if (entry.options.id === undefined) continue
-      tabs.push({ id: entry.options.id, label: entry.options.label ?? entry.options.id })
+      tabs.push({ id: entry.options.id, label: resolveSlotLabel(entry.options.label) ?? entry.options.id })
     }
     return tabs
   }
@@ -132,6 +120,7 @@ export function apply(ctx: Context): void {
   // frame while strict session slots fill only their session-bound regions.
   slots.register({
     name: 'conversation',
+    locale: NS,
     children: {
       'conversation.session': { kind: 'single', scope: 'session' },
       'conversation.composer': { kind: 'chain', scope: 'session' },
@@ -163,6 +152,7 @@ export function apply(ctx: Context): void {
   // the resident parent keeps Hero and composer layout identity stable.
   slots.register({
     name: 'conversation.session',
+    locale: NS,
     children: { 'conversation.view': { kind: 'list', scope: 'session' } },
     store: chatStore,
     inject: (sessionId: SessionId, _actions: BoundActions<typeof chatStore>): ConversationSessionInjected => ({
@@ -185,6 +175,7 @@ export function apply(ctx: Context): void {
   // observableHook caching and hook order stay stable across transitions).
   slots.register({
     name: 'conversation.composer.bar',
+    locale: NS,
     // The two named control seats in the bar's tool row (plan beside the
     // access control, model right); empty until their owning plugins
     // register (B ruling).
@@ -198,7 +189,6 @@ export function apply(ctx: Context): void {
           keyboard: undefined,
           stop: undefined,
           command: undefined,
-          translateHint,
           hooks: { notices: ABSENT_NOTICES, lexicon: ABSENT_LEXICON },
         }
       }
@@ -216,7 +206,6 @@ export function apply(ctx: Context): void {
           const result = await session.command(line)
           return result.ok && result.value.matched
         },
-        translateHint,
         hooks: { notices: shell.notices, lexicon: shell.lexicon },
       }
     },
@@ -230,7 +219,7 @@ export function apply(ctx: Context): void {
   // pending — a question is a conversation the model is waiting on, while an
   // approval only blocks one tool call; answering the question first cannot
   // strand the approval (it re-elects the moment the question resolves).
-  slots.register({ name: 'conversation.composer', select: selectApproval, priority: 1 }, ApprovalPanel)
+  slots.register({ name: 'conversation.composer', select: selectApproval, priority: 1, locale: NS }, ApprovalPanel)
 
   // The chat view: first entry of the ring this package just declared.
   // Declaring the keyed toolview hole here is claiming it: ChatView is the
@@ -241,7 +230,8 @@ export function apply(ctx: Context): void {
     name: 'conversation.view',
     id: 'chat',
     order: 0,
-    label: 'Chat',
+    label: () => t('view.chat'),
+    locale: NS,
     children: {
       'conversation.chat.toolview': { kind: 'keyed', scope: 'session' },
       'conversation.chat.commandview': { kind: 'keyed', scope: 'session' },
@@ -262,6 +252,13 @@ export function apply(ctx: Context): void {
           })
         },
         loadOlder: () => { void scoped.loadOlder() },
+        forkAt: (seq) => {
+          sessions.fork({ sessionId, atSeq: seq, increaseTitle: true })
+            .then((childId) => { sessions.open(childId) })
+            .catch(() => {
+              // Fork or child-rename failure keeps the source view untouched.
+            })
+        },
       }
     },
   }, ChatView)
@@ -296,6 +293,7 @@ export function apply(ctx: Context): void {
 
   slots.register({
     name: 'details',
+    locale: NS,
     store: chatStore,
     inject: (): DetailsInjected => ({
       closeDetails: () => { layout.closeDetails() },

packages/client/ui-conversation/src/client/chat/AssistantMarkdown.tsx

@@ -4,14 +4,16 @@
 // view groups them into tool rows through its keyed toolview slot (figma
 // step-summary flow). Shared by finalized nodes and the streaming partial;
 // the turn-level loading dots live in the chat view's tail, not here.
-// Finalized content (text) nodes append IconActions once streaming ends;
-// Think / tool-head-only nodes stay chrome-free.
+// Finalized turn-tail content (text) nodes append IconActions once streaming
+// ends (`time` is omitted for mid-turn narration); Think / tool-head-only
+// nodes stay chrome-free.
 
-import { memo } from 'react'
+import { memo, useMemo } from 'react'
 import type { AssistantBlock } from '@deepseek-ai/dsh-client-runtime/client'
 import {
   IconThinkOutline14, JsonBlock, MarkdownText,
 } from '@deepseek-ai/dsh-client-ui-primitives'
+import type { ChatViewSlotProps } from '../contract/slots.ts'
 import { MessageIconActions } from './MessageIconActions.tsx'
 import { ToolRow } from './ToolRow.tsx'
 import css from './AssistantMarkdown.module.css'
@@ -19,10 +21,17 @@ import css from './AssistantMarkdown.module.css'
 export interface AssistantMarkdownProps {
   blocks: readonly AssistantBlock[]
   streaming: boolean
-  /** Frozen partial of an aborted turn: rendered with a 已停止 marker. */
+  /** Frozen partial of an aborted turn: rendered with a stopped marker. */
   interrupted?: boolean | undefined
-  /** Unix epoch ms for the finalized IconActions clock; omitted while streaming. */
+  /** Unix epoch ms for the IconActions clock; omitted while streaming or when
+   *  the parent withholds chrome (mid-turn content assistants). */
   time?: number | undefined
+  /** Event sequence used as the fork boundary; omitted while streaming. */
+  seq?: number | undefined
+  /** Fork the session through the turn containing this finalized message. */
+  onFork?: ((seq: number) => void) | undefined
+  /** The owning view's locale seat, passed down as a plain prop. */
+  t: ChatViewSlotProps['t']
 }
 
 function firstLine(text: string): string {
@@ -45,9 +54,10 @@ function hasContentText(blocks: readonly AssistantBlock[]): boolean {
 }
 
 /** Reasoning block as the Think variant summary row (figma 39:28304). */
-function ThinkRow({ text, running }: { text: string; running: boolean }) {
+function ThinkRow({ text, running, t }: { text: string; running: boolean; t: AssistantMarkdownProps['t'] }) {
   return (
     <ToolRow
+      t={t}
       variant="think"
       icon={<IconThinkOutline14 size={14} />}
       title="Think"
@@ -60,8 +70,11 @@ function ThinkRow({ text, running }: { text: string; running: boolean }) {
 }
 
 export const AssistantMarkdown = memo(function AssistantMarkdown({
-  blocks, streaming, interrupted, time,
+  blocks, streaming, interrupted, time, seq, onFork, t,
 }: AssistantMarkdownProps) {
+  // Stable per locale revision (t identity changes on switch): a fresh object
+  // per render would rebuild MarkdownText's component table every chunk.
+  const codeLabels = useMemo(() => ({ copyLabel: t('copy'), copiedLabel: t('copied') }), [t])
   const last = blocks.length - 1
   // Tool-call heads render as tool rows in the chat view's grouping pass, so
   // a node that is only those heads (or empty) would paint an empty root
@@ -77,21 +90,32 @@ export const AssistantMarkdown = memo(function AssistantMarkdown({
       <div className={css.body}>
         {blocks.map((block, i) => {
           switch (block.kind) {
-            case 'text': return <MarkdownText key={i} text={block.text} streaming={streaming} />
-            case 'reasoning': return <ThinkRow key={i} text={block.text} running={streaming && i === last} />
+            case 'text': return (
+              <MarkdownText key={i} text={block.text} streaming={streaming} codeLabels={codeLabels} />
+            )
+            case 'reasoning': return <ThinkRow key={i} text={block.text} running={streaming && i === last} t={t} />
             // Grouped into tool rows by ChatView; hasVisible above skips an empty shell.
             case 'tool-call': return null
-            default: return <JsonBlock key={i} label="未知内容块" payload={block.block} />
+            default: return (
+              <JsonBlock
+                key={i}
+                label={t('message.unknownBlock')}
+                payload={block.block}
+                truncatedLabel={total => t('json.truncated', { total })}
+              />
+            )
           }
         })}
-        {interrupted && <span className={css.stopped}>已停止</span>}
+        {interrupted && <span className={css.stopped}>{t('message.stopped')}</span>}
       </div>
       {showActions && (
         <MessageIconActions
           text={copyText(blocks)}
           time={time}
           clock="end"
+          onBranch={onFork === undefined || seq === undefined ? undefined : () => { onFork(seq) }}
           className={css.actions}
+          t={t}
         />
       )}
     </div>

packages/client/ui-conversation/src/client/chat/ChatView.tsx

@@ -30,7 +30,7 @@ import type {
 import type { SnapshotSelectorHook } from '@deepseek-ai/dsh-client-ui-slots'
 import { IconChevronDownOutline14 } from '@deepseek-ai/dsh-client-ui-primitives'
 import type { ChatViewSlotProps } from '../contract/slots.ts'
-import { deriveChatFlow, type ChatFlowItem } from './chat-flow.ts'
+import { assistantActionsSeqs, deriveChatFlow, type ChatFlowItem } from './chat-flow.ts'
 import { AssistantMarkdown } from './AssistantMarkdown.tsx'
 import { GenericCommandCard } from './GenericCommandCard.tsx'
 import { GenericToolCard } from './GenericToolCard.tsx'
@@ -57,12 +57,13 @@ type UseConversation = SnapshotSelectorHook<ConversationSnapshot>
  *  top-level call (same registrations, same fallback), nested by the parent.
  *  A started-but-unsettled sub-call arrives as the RunningToolCall shape and
  *  renders the running state exactly as a native in-flight row. */
-const SubCallRow = memo(function SubCallRow({ renderSlot, node, openFile, selected, cwd }: {
+const SubCallRow = memo(function SubCallRow({ renderSlot, node, openFile, selected, cwd, t }: {
   renderSlot: RenderToolRow
   node: CodeSubCall
   openFile: OpenFile
   selected: boolean
   cwd: string | undefined
+  t: ChatViewSlotProps['t']
 }) {
   const settled = 'kind' in node
   const toolName = settled ? node.call?.name ?? '' : node.name
@@ -73,7 +74,7 @@ const SubCallRow = memo(function SubCallRow({ renderSlot, node, openFile, select
     <div className={css.callRow} data-selected={selected || undefined}>
       {renderSlot('conversation.chat.toolview', owner, {
         entryKey: toolName,
-        fallback: <GenericToolCard {...owner} />,
+        fallback: <GenericToolCard {...owner} t={t} />,
       })}
     </div>
   )
@@ -85,7 +86,7 @@ const SubCallRow = memo(function SubCallRow({ renderSlot, node, openFile, select
  *  renders its logged sub-dispatches as always-visible indented rows —
  *  each one the same keyed-slot dispatch as a native top-level call. */
 const CallRow = memo(function CallRow({
-  renderSlot, callId, toolName, block, openFile, selected, subCalls, selectedCallId, cwd,
+  renderSlot, callId, toolName, block, openFile, selected, subCalls, selectedCallId, cwd, t,
 }: {
   renderSlot: RenderToolRow
   callId: string
@@ -100,6 +101,7 @@ const CallRow = memo(function CallRow({
   selectedCallId?: string | undefined
   /** Session workspace root for path-relative summaries. */
   cwd: string | undefined
+  t: ChatViewSlotProps['t']
 }) {
   const owner = useMemo(() => ({
     callId, toolName, block, openFile, cwd,
@@ -108,7 +110,7 @@ const CallRow = memo(function CallRow({
     <div className={css.callRow} data-selected={selected || undefined}>
       {renderSlot('conversation.chat.toolview', owner, {
         entryKey: toolName,
-        fallback: <GenericToolCard {...owner} />,
+        fallback: <GenericToolCard {...owner} t={t} />,
       })}
       {subCalls !== undefined && subCalls.length > 0 && (
         <div className={css.subCalls} data-subcalls>
@@ -120,6 +122,7 @@ const CallRow = memo(function CallRow({
               openFile={openFile}
               selected={node.callId === selectedCallId}
               cwd={cwd}
+              t={t}
             />
           ))}
         </div>
@@ -129,7 +132,7 @@ const CallRow = memo(function CallRow({
 })
 
 /** Consecutive tool results as one step-run group (uniform 16px rhythm). */
-const ToolGroup = memo(function ToolGroup({ renderSlot, results, openFile, selectedCallId, codeDispatches, cwd }: {
+const ToolGroup = memo(function ToolGroup({ renderSlot, results, openFile, selectedCallId, codeDispatches, cwd, t }: {
   renderSlot: RenderToolRow
   results: readonly ToolResultNode[]
   openFile: OpenFile
@@ -139,6 +142,7 @@ const ToolGroup = memo(function ToolGroup({ renderSlot, results, openFile, selec
   codeDispatches: ReadonlyMap<string, readonly CodeSubCall[]>
   /** Session workspace root for path-relative summaries. */
   cwd: string | undefined
+  t: ChatViewSlotProps['t']
 }) {
   return (
     <div className={css.toolGroup}>
@@ -154,6 +158,7 @@ const ToolGroup = memo(function ToolGroup({ renderSlot, results, openFile, selec
           subCalls={codeDispatches.get(node.callId)}
           selectedCallId={selectedCallId}
           cwd={cwd}
+          t={t}
         />
       ))}
     </div>
@@ -163,16 +168,17 @@ const ToolGroup = memo(function ToolGroup({ renderSlot, results, openFile, selec
 /** One command lifecycle row: keyed dispatch on the command name with the
  *  generic card as the render-site fallback (zero registration required). A
  *  run-less cross-window node has no name and always lands on the fallback. */
-const CommandRow = memo(function CommandRow({ renderSlot, node }: {
+const CommandRow = memo(function CommandRow({ renderSlot, node, t }: {
   renderSlot: RenderToolRow
   node: CommandNode
+  t: ChatViewSlotProps['t']
 }) {
   const owner = useMemo(() => ({ node }), [node])
   return (
     <div className={css.callRow}>
       {renderSlot('conversation.chat.commandview', owner, {
         entryKey: node.name ?? '',
-        fallback: <GenericCommandCard {...owner} />,
+        fallback: <GenericCommandCard {...owner} t={t} />,
       })}
     </div>
   )
@@ -214,23 +220,24 @@ function TurnDots() {
 
 /** The streaming partial, isolated so chunk batches re-render only this tail.
  *  onGrow lets the scroll owner follow content the parent never re-renders for. */
-function StreamingTail({ useSession, onGrow }: {
+function StreamingTail({ useSession, onGrow, t }: {
   useSession: UseConversation
   onGrow: () => void
+  t: ChatViewSlotProps['t']
 }) {
   const partial = useSession(s => s.partial)
   useLayoutEffect(() => {
     onGrow()
   })
   if (partial === null) return null
-  return <AssistantMarkdown blocks={partial.blocks} streaming />
+  return <AssistantMarkdown blocks={partial.blocks} streaming t={t} />
 }
 
 /**
  * The chat view slot entry: pure component over the composed props (tool rows
  * render through the declared keyed hole's renderSlot share).
  */
-export function ChatView({ useSession, useSessions, useStore, renderSlot, sessionId, openFile, loadOlder }: ChatViewSlotProps) {
+export function ChatView({ useSession, useSessions, useStore, renderSlot, sessionId, openFile, loadOlder, forkAt, t }: ChatViewSlotProps) {
   const nodes = useSession(s => s.nodes)
   // Workspace root off the session list row: path summaries display relative to it.
   const cwd = useSessions(s => s.byId[sessionId]?.cwd)
@@ -238,12 +245,15 @@ export function ChatView({ useSession, useSessions, useStore, renderSlot, sessio
   const runningCalls = useSession(s => s.runningCalls)
   const codeDispatches = useSession(s => s.codeDispatches)
   const openState = useSession(s => s.openState)
-  const openErrorMessage = useSession(s => s.openError === null ? null : `${s.openError.message}（${s.openError.code}）`)
+  const openError = useSession(s => s.openError)
   const hasMore = useSession(s => s.hasMore)
   const loadingOlder = useSession(s => s.loadingOlder)
   const selectedCallId = useStore(s => s.selection?.callId)
 
   const items = useMemo(() => deriveChatFlow(nodes), [nodes])
+  // Only the last content assistant of each turn owns IconActions; mid-turn
+  // text (before tools) omits `time` so AssistantMarkdown stays chrome-free.
+  const actionSeqs = useMemo(() => assistantActionsSeqs(nodes), [nodes])
 
   const listRef = useRef<HTMLDivElement | null>(null)
   const atBottomRef = useRef(true)
@@ -365,6 +375,7 @@ export function ChatView({ useSession, useSessions, useStore, renderSlot, sessio
           selectedCallId={inGroup ? selectedCallId : undefined}
           codeDispatches={codeDispatches}
           cwd={cwd}
+          t={t}
         />
       )
     }
@@ -376,33 +387,40 @@ export function ChatView({ useSession, useSessions, useStore, renderSlot, sessio
           blocks={node.blocks}
           streaming={false}
           interrupted={node.interrupted}
-          time={node.time}
+          time={actionSeqs.has(node.seq) ? node.time : undefined}
+          seq={node.seq}
+          onFork={forkAt}
+          t={t}
         />
       )
     }
     if (node.kind === 'command') {
-      return <CommandRow key={item.key} renderSlot={renderSlot} node={node} />
+      return <CommandRow key={item.key} renderSlot={renderSlot} node={node} t={t} />
     }
     /* v8 ignore next -- tool-result never reaches here: deriveChatFlow folds them into groups. */
     if (node.kind === 'tool-result') return null
-    return <MessageItem key={item.key} node={node} />
+    return <MessageItem key={item.key} node={node} onFork={forkAt} t={t} />
   }
 
   return (
     <div className={css.root}>
       <div ref={listRef} className={css.scroll}>
         <div className={css.column}>
-          {openState === 'loading' && <div className={css.hint}>载入历史…</div>}
-          {openState === 'error' && <div className={css.openError}>历史加载失败：{openErrorMessage}</div>}
+          {openState === 'loading' && <div className={css.hint}>{t('chat.loadingHistory')}</div>}
+          {openState === 'error' && openError !== null && (
+            <div className={css.openError}>
+              {t('chat.loadError', { message: openError.message, code: openError.code })}
+            </div>
+          )}
           {hasMore && (
             <div className={css.older}>
               <button type="button" disabled={loadingOlder} onClick={loadOlderAnchored}>
-                {loadingOlder ? '加载中…' : '加载更早'}
+                {loadingOlder ? t('loading') : t('chat.loadOlder')}
               </button>
             </div>
           )}
           {items.map(renderItem)}
-          <StreamingTail useSession={useSession} onGrow={onGrow} />
+          <StreamingTail useSession={useSession} onGrow={onGrow} t={t} />
           {runningCalls.length > 0 && (
             <div className={css.toolGroup}>
               {runningCalls.map(call => (
@@ -417,6 +435,7 @@ export function ChatView({ useSession, useSessions, useStore, renderSlot, sessio
                   subCalls={codeDispatches.get(call.callId)}
                   selectedCallId={selectedCallId}
                   cwd={cwd}
+                  t={t}
                 />
               ))}
             </div>
@@ -433,7 +452,7 @@ export function ChatView({ useSession, useSessions, useStore, renderSlot, sessio
             <button
               type="button"
               className={css.toBottom}
-              aria-label="回到底部"
+              aria-label={t('chat.toBottom')}
               onClick={() => {
                 const local = listRef.current
                 /* v8 ignore next -- ref-null guard: the button only renders alongside the mounted list. */

packages/client/ui-conversation/src/client/chat/ContextInjectionRow.module.css

@@ -0,0 +1,29 @@
+/* Figma 10:2482: 24px Tool calls header, 4px gap, 141px clipped code block. */
+
+.root {
+  min-width: 0;
+}
+
+.root[data-open] {
+  padding-bottom: 4px;
+}
+
+.chevron {
+  color: var(--dsw-alias-label-secondary);
+}
+
+.body {
+  box-sizing: border-box;
+  width: calc(100% - 22px);
+  height: 141px;
+  margin: 4px 0 0 22px;
+  overflow: auto;
+  padding: 10px 16px 12px 12px;
+  border: none;
+  border-radius: 8px;
+  background: var(--dsw-alias-markdown-code-block);
+  color: var(--dsw-alias-label-tertiary);
+  font: 400 11px/16px var(--ds-font-family-code);
+  white-space: pre-wrap;
+  overflow-wrap: anywhere;
+}

packages/client/ui-conversation/src/client/chat/ContextInjectionRow.tsx

@@ -0,0 +1,84 @@
+import { useMemo, useState } from 'react'
+import type { ContextMessageNode } from '@deepseek-ai/dsh-client-runtime/client'
+import type { ChatViewSlotProps } from '../contract/slots.ts'
+import { IconBrowseOutline16 } from '@deepseek-ai/dsh-client-ui-primitives'
+import { DisclosureRow } from './DisclosureRow.tsx'
+import css from './ContextInjectionRow.module.css'
+
+const MAX_CHARS = 20_000
+
+function inlineJson(payload: unknown): string {
+  const raw = JSON.stringify(payload)
+  let formatted = ''
+  let quoted = false
+  let escaped = false
+
+  for (let index = 0; index < raw.length; index++) {
+    const char = raw.charAt(index)
+    if (quoted) {
+      formatted += char
+      if (escaped) escaped = false
+      else if (char === '\\') escaped = true
+      else if (char === '"') quoted = false
+      continue
+    }
+    if (char === '"') {
+      quoted = true
+      formatted += char
+      continue
+    }
+    if (char === '{' || char === '[') {
+      formatted += char
+      const close = char === '{' ? '}' : ']'
+      if (raw[index + 1] !== close) formatted += ' '
+      continue
+    }
+    if (char === '}' || char === ']') {
+      const open = char === '}' ? '{' : '['
+      if (raw[index - 1] !== open) formatted += ' '
+      formatted += char
+      continue
+    }
+    formatted += char === ':' || char === ',' ? `${char} ` : char
+  }
+  return formatted
+}
+
+/** Props for the logged non-user message presentation. */
+export interface ContextInjectionRowProps {
+  content: ContextMessageNode['content']
+  source: ContextMessageNode['source']
+  /** The owning view's locale seat, passed down as a plain prop. */
+  t: ChatViewSlotProps['t']
+}
+
+/**
+ * Render logged context with the Tool calls disclosure chrome from Figma.
+ * @param props - Durable content and source provenance.
+ * @returns A collapsed context row with a bounded JSON body.
+ */
+export function ContextInjectionRow({ content, source, t }: ContextInjectionRowProps) {
+  const [open, setOpen] = useState(false)
+  const body = useMemo(() => {
+    if (!open) return ''
+    const text = inlineJson({ content, source })
+    return text.length > MAX_CHARS
+      ? `${text.slice(0, MAX_CHARS)}\n${t('json.truncated', { total: text.length })}`
+      : text
+  }, [content, open, source, t])
+
+  return (
+    <DisclosureRow
+      className={css.root}
+      icon={<IconBrowseOutline16 size={14} />}
+      chevronClassName={css.chevron}
+      title={t('message.contextInjection')}
+      open={open}
+      expandable
+      expandOnRowClick
+      onToggle={() => { setOpen(value => !value) }}
+    >
+      <pre className={css.body} data-context-injection-body>{body}</pre>
+    </DisclosureRow>
+  )
+}

packages/client/ui-conversation/src/client/chat/DisclosureRow.module.css

@@ -0,0 +1,69 @@
+/* Shared Tool calls disclosure header: [16px leading] gap 6 [title 14/24]. */
+
+.root {
+  display: flex;
+  flex-direction: column;
+  width: 100%;
+  min-width: 0;
+}
+
+.row {
+  position: relative;
+  overflow: hidden;
+  display: flex;
+  align-items: center;
+  height: 24px;
+  min-width: 0;
+}
+
+.row[data-expandable] {
+  cursor: pointer;
+}
+
+.leading {
+  position: relative;
+  flex: none;
+  width: 16px;
+  height: 16px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  margin-right: 6px;
+  padding: 0;
+  border: none;
+  background: none;
+  color: var(--dsw-alias-label-tertiary);
+}
+
+button.leading {
+  cursor: pointer;
+}
+
+.iconIdle {
+  display: inline-flex;
+  opacity: 1;
+  transition: opacity 100ms ease;
+}
+
+.chevronHover {
+  position: absolute;
+  inset: 0;
+  margin: auto;
+  opacity: 0;
+  transition: opacity 100ms ease;
+}
+
+.row:hover .iconIdle {
+  opacity: 0;
+}
+
+.row:hover .chevronHover {
+  opacity: 1;
+}
+
+.title {
+  flex: none;
+  font-size: 14px;
+  line-height: 24px;
+  color: var(--dsw-alias-label-secondary);
+}

packages/client/ui-conversation/src/client/chat/DisclosureRow.tsx

@@ -0,0 +1,101 @@
+import { type KeyboardEvent, type MouseEvent, type ReactNode } from 'react'
+import clsx from 'clsx'
+import { IconChevronDownOutline14 } from '@deepseek-ai/dsh-client-ui-primitives'
+import css from './DisclosureRow.module.css'
+
+/** Shared 24px disclosure chrome for conversation flow rows. */
+export interface DisclosureRowProps {
+  icon: ReactNode
+  title: string
+  open: boolean
+  expandable: boolean
+  onToggle: () => void
+  /** Makes the complete title row the disclosure target. */
+  expandOnRowClick?: boolean | undefined
+  /** Replaces the collapsed icon with a chevron while the row is hovered. */
+  previewChevron?: boolean | undefined
+  collapsedContent?: ReactNode
+  children?: ReactNode
+  className?: string | undefined
+  rowClassName?: string | undefined
+  leadingClassName?: string | undefined
+  chevronClassName?: string | undefined
+  titleClassName?: string | undefined
+}
+
+/**
+ * Render one disclosure header and its controlled expanded content.
+ * @param props - Visual content, controlled state, and interaction policy.
+ * @returns The disclosure row.
+ */
+export function DisclosureRow({
+  icon,
+  title,
+  open,
+  expandable,
+  onToggle,
+  expandOnRowClick = false,
+  previewChevron = expandable,
+  collapsedContent,
+  children,
+  className,
+  rowClassName,
+  leadingClassName,
+  chevronClassName,
+  titleClassName,
+}: DisclosureRowProps) {
+  const rowExpands = expandable && expandOnRowClick
+  const toggleFromLeading = (event: MouseEvent<HTMLButtonElement>) => {
+    event.stopPropagation()
+    onToggle()
+  }
+  const toggleFromKeyboard = (event: KeyboardEvent<HTMLDivElement>) => {
+    if (!rowExpands || (event.key !== 'Enter' && event.key !== ' ')) return
+    event.preventDefault()
+    onToggle()
+  }
+  const collapsedLeading = previewChevron
+    ? (
+      <>
+        <span className={css.iconIdle}>{icon}</span>
+        <IconChevronDownOutline14 className={clsx(chevronClassName, css.chevronHover)} />
+      </>
+    )
+    : icon
+  const leading = open
+    ? <IconChevronDownOutline14 className={chevronClassName} />
+    : collapsedLeading
+
+  return (
+    <div className={clsx(css.root, className)} data-open={open || undefined}>
+      <div
+        className={clsx(css.row, rowClassName)}
+        data-disclosure-row
+        data-expandable={rowExpands || undefined}
+        role={rowExpands ? 'button' : undefined}
+        tabIndex={rowExpands ? 0 : undefined}
+        aria-expanded={rowExpands ? open : undefined}
+        onClick={rowExpands ? onToggle : undefined}
+        onKeyDown={rowExpands ? toggleFromKeyboard : undefined}
+      >
+        {expandable && !rowExpands ? (
+          <button
+            type="button"
+            className={clsx(css.leading, leadingClassName)}
+            aria-expanded={open}
+            onClick={toggleFromLeading}
+          >
+            {leading}
+          </button>
+        ) : (
+          <span className={clsx(css.leading, leadingClassName)}>
+            {leading}
+          </span>
+        )}
+        <span className={clsx(css.title, titleClassName)}>{title}</span>
+        {!open && collapsedContent}
+      </div>
+      {open && children}
+    </div>
+  )
+}

packages/client/ui-conversation/src/client/chat/GenericCommandCard.tsx

@@ -1,12 +1,12 @@
 // GenericCommandCard: the default command row — a stripped-down
-// GenericToolCard rendering the dispatched command line and the settlement
-// text. Supplied by the chat view as the keyed commandview slot's render-site
+// GenericToolCard rendering the command name and its settlement text.
+// Supplied by the chat view as the keyed commandview slot's render-site
 // fallback (an unregistered command name lands here); registrants may compose
 // it as a base, feeding the same owner payload through.
 
 import { ToolRow } from './ToolRow.tsx'
 import type { ToolRowState } from '../contract/tool-call-model.ts'
-import type { CommandRowOwnerProps } from '../contract/slots.ts'
+import type { ChatViewSlotProps, CommandRowOwnerProps } from '../contract/slots.ts'
 import { IconApiOutline14 } from '@deepseek-ai/dsh-client-ui-primitives'
 
 /** Node state → row state semantic (running while unsettled; outcome kind after). */
@@ -15,17 +15,24 @@ function stateOf(outcome: CommandRowOwnerProps['node']['outcome']): ToolRowState
   return outcome.kind === 'error' ? 'error' : 'ok'
 }
 
-export function GenericCommandCard({ node }: CommandRowOwnerProps) {
+/** Card props: the owner payload plus the render site's locale seat (plain prop). */
+export interface GenericCommandCardProps extends CommandRowOwnerProps {
+  t: ChatViewSlotProps['t']
+}
+
+export function GenericCommandCard({ node, t }: GenericCommandCardProps) {
   const text = node.outcome?.text
   const summary = node.outcome === null
-    ? '执行中…'
-    : text ?? (node.outcome.kind === 'error' ? '命令失败' : '已完成')
-  // Display line rebuilt from the structured payload (args carries its own
-  // separator whitespace verbatim); a cross-window node whose run page fell
-  // out of the window has neither.
-  const title = node.name === null ? '命令' : `/${node.name}${node.args ?? ''}`
+    ? t('command.running')
+    : text ?? (node.outcome.kind === 'error' ? t('command.failed') : t('command.done'))
+  // Title is the bare command name: the row already reads `name · outcome`,
+  // and the dispatched line's own `/` and arguments only restate what the
+  // settlement text says (`permission · preset workspace-write`). A
+  // cross-window node whose run page fell out of the window has no name.
+  const title = node.name ?? t('command.title')
   return (
     <ToolRow
+      t={t}
       variant="others"
       icon={<IconApiOutline14 size={16} />}
       title={title}

packages/client/ui-conversation/src/client/chat/GenericToolCard.tsx

@@ -9,7 +9,7 @@ import {
   IconApiOutline14, IconBrowseOutline16, IconCodeOutline16, IconEditOutline16, IconSearchOutline16, IconSparkle16,
   IconThinkOutline14,
 } from '@deepseek-ai/dsh-client-ui-primitives'
-import type { ToolRowOwnerProps } from '../contract/slots.ts'
+import type { ChatViewSlotProps, ToolRowOwnerProps } from '../contract/slots.ts'
 import { terminalCardModel } from '../contract/terminal-card-model.ts'
 import { toolRowModel, type ToolRowVariant } from '../contract/tool-call-model.ts'
 import { ToolRow } from './ToolRow.tsx'
@@ -26,12 +26,18 @@ const VARIANT_ICONS: Record<ToolRowVariant, ReactNode> = {
   others: <IconSparkle16 size={14} />,
 }
 
-export function GenericToolCard({ toolName, block, cwd, openFile }: ToolRowOwnerProps) {
+/** Card props: the owner payload plus the render site's locale seat (plain prop). */
+export interface GenericToolCardProps extends ToolRowOwnerProps {
+  t: ChatViewSlotProps['t']
+}
+
+export function GenericToolCard({ toolName, block, cwd, openFile, t }: GenericToolCardProps) {
   const model = toolRowModel(toolName, block, cwd)
   const terminal = terminalCardModel(block, cwd)
   const singleFile = model.filePath !== undefined
   return (
     <ToolRow
+      t={t}
       variant={model.variant}
       toolName={toolName}
       icon={VARIANT_ICONS[model.variant]}

packages/client/ui-conversation/src/client/chat/MessageIconActions.tsx

@@ -1,10 +1,12 @@
-// Shared IconActions chrome for user and assistant messages: copy / branch
-// live (branch still a stub), date-aware clock, optional edit stub.
+// Shared IconActions chrome for user and assistant messages: copy live,
+// branch wired through onBranch, date-aware clock,
+// optional edit stub.
 
 import { useCallback } from 'react'
 import {
   IconBranchOutline16, IconCopyOutline16, IconEditOutline16, Tooltip,
 } from '@deepseek-ai/dsh-client-ui-primitives'
+import type { ChatViewSlotProps } from '../contract/slots.ts'
 import { formatMessageClock, writeClipboard } from './message-chrome.ts'
 import { useCalendarDay } from './use-calendar-day.ts'
 import css from './MessageIconActions.module.css'
@@ -18,17 +20,21 @@ export interface MessageIconActionsProps {
   clock: 'start' | 'end'
   /** When true, append the stub edit control (user bubble). */
   edit?: boolean | undefined
+  /** Fork the session at this message. */
+  onBranch?: (() => void) | undefined
   /** Parent layout class composed onto the actions row. */
   className?: string | undefined
+  /** The owning view's locale seat, passed down as a plain prop. */
+  t: ChatViewSlotProps['t']
 }
 
 /**
  * Copy / branch (/ clock) IconActions row shared by user and assistant chrome.
- * @param props - Copy text, event time, clock side, optional edit, className.
+ * @param props - Copy text, event time, clock side, optional edit, branch callback, className.
  * @returns The actions row element.
  */
 export function MessageIconActions({
-  text, time, clock, edit, className,
+  text, time, clock, edit, onBranch, className, t,
 }: MessageIconActionsProps) {
   const day = useCalendarDay()
   const onCopy = useCallback(() => {
@@ -36,25 +42,25 @@ export function MessageIconActions({
   }, [text])
   const clockEl = (
     <span className={clock === 'start' ? css.timeStart : css.timeEnd}>
-      {formatMessageClock(time, day)}
+      {formatMessageClock(time, t, day)}
     </span>
   )
   return (
     <div className={className === undefined ? css.actions : `${css.actions} ${className}`}>
       {clock === 'start' ? clockEl : null}
-      <Tooltip label="复制" side="bottom">
-        <button type="button" className={css.action} aria-label="复制" onClick={onCopy}>
+      <Tooltip label={t('copy')} side="bottom">
+        <button type="button" className={css.action} aria-label={t('copy')} onClick={onCopy}>
           <IconCopyOutline16 />
         </button>
       </Tooltip>
-      <Tooltip label="在新对话中分支" side="bottom">
-        <button type="button" className={css.action} aria-label="在新对话中分支">
+      <Tooltip label={t('message.branch')} side="bottom">
+        <button type="button" className={css.action} aria-label={t('message.branch')} onClick={onBranch}>
           <IconBranchOutline16 />
         </button>
       </Tooltip>
       {edit === true && (
-        <Tooltip label="编辑" side="bottom">
-          <button type="button" className={css.action} aria-label="编辑">
+        <Tooltip label={t('edit')} side="bottom">
+          <button type="button" className={css.action} aria-label={t('edit')}>
             <IconEditOutline16 />
           </button>
         </Tooltip>

packages/client/ui-conversation/src/client/chat/MessageItem.tsx

@@ -10,11 +10,17 @@ import type {
   ContextMessageNode, SteeringMessageNode, UnknownSurfaceNode, UserMessageNode,
 } from '@deepseek-ai/dsh-client-runtime/client'
 import { JsonBlock, MessageText } from '@deepseek-ai/dsh-client-ui-primitives'
+import type { ChatViewSlotProps } from '../contract/slots.ts'
+import { ContextInjectionRow } from './ContextInjectionRow.tsx'
 import { MessageIconActions } from './MessageIconActions.tsx'
 import css from './MessageItem.module.css'
 
 export interface MessageItemProps {
   node: UserMessageNode | SteeringMessageNode | ContextMessageNode | UnknownSurfaceNode
+  /** Fork the session through the turn containing this message (user-bubble branch action). */
+  onFork?: (seq: number) => void
+  /** The owning view's locale seat, passed down as a plain prop. */
+  t: ChatViewSlotProps['t']
 }
 
 function contentText(content: readonly unknown[]): { text: string; rest: unknown[] } {
@@ -60,7 +66,8 @@ function projectUserText(text: string): ReactNode {
   return <>{parts}</>
 }
 
-export const MessageItem = memo(function MessageItem({ node }: MessageItemProps) {
+export const MessageItem = memo(function MessageItem({ node, onFork, t }: MessageItemProps) {
+  const truncated = (total: number): string => t('json.truncated', { total })
   switch (node.kind) {
     case 'user': {
       const { text, rest } = contentText(node.content)
@@ -68,14 +75,16 @@ export const MessageItem = memo(function MessageItem({ node }: MessageItemProps)
         <div className={css.userRow}>
           <div className={css.bubble}>
             {projectUserText(text)}
-            {rest.map((block, i) => <JsonBlock key={i} label="附加内容块" payload={block} />)}
+            {rest.map((block, i) => <JsonBlock key={i} label={t('message.extraBlock')} payload={block} truncatedLabel={truncated} />)}
           </div>
           <MessageIconActions
             text={text}
             time={node.time}
             clock="start"
             edit
+            onBranch={onFork === undefined ? undefined : () => { onFork(node.seq) }}
             className={css.actions}
+            t={t}
           />
         </div>
       )
@@ -85,23 +94,21 @@ export const MessageItem = memo(function MessageItem({ node }: MessageItemProps)
       return (
         <div className={css.userRow}>
           <div className={css.bubble}>
-            <span className={css.badge}>插话</span>
+            <span className={css.badge}>{t('message.steering')}</span>
             {projectUserText(text)}
-            {rest.map((block, i) => <JsonBlock key={i} label="附加内容块" payload={block} />)}
+            {rest.map((block, i) => <JsonBlock key={i} label={t('message.extraBlock')} payload={block} truncatedLabel={truncated} />)}
           </div>
         </div>
       )
     }
     case 'context':
       return (
-        <div className={css.contextRow}>
-          <JsonBlock label="上下文注入" payload={{ content: node.content, source: node.source }} />
-        </div>
+        <ContextInjectionRow content={node.content} source={node.source} t={t} />
       )
     default:
       return (
         <div className={css.contextRow}>
-          <JsonBlock label={`未知 surface 事件：${node.type}`} payload={node.data} />
+          <JsonBlock label={t('message.unknownSurface', { type: node.type })} payload={node.data} truncatedLabel={truncated} />
         </div>
       )
   }

packages/client/ui-conversation/src/client/chat/ToolRow.module.css

@@ -9,10 +9,6 @@
 .row {
   position: relative; /* sweep-glare overlay anchor */
   overflow: hidden;
-  display: flex;
-  align-items: center;
-  height: 24px;
-  min-width: 0;
 }
 
 /* Running sweep (deepsuite ShimmerText pattern): a fixed-width glare band —
@@ -41,24 +37,8 @@
   90%, 100% { left: 100%; }
 }
 
-/* Expand-on-row (Think / code): pointer only — no row fill hover. */
-.row[data-expandable] {
-  cursor: pointer;
-}
-
 .leading {
-  position: relative; /* .chevronHover overlay anchor */
-  flex: none;
-  width: 16px;
-  height: 16px;
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-  margin-right: 6px;
-  padding: 0;
-  border: none;
-  background: none;
-  color: var(--dsw-alias-label-tertiary);
+  flex-shrink: 0;
 }
 
 /* Cordis lifecycle tools retain their generic row mechanics while carrying a
@@ -76,40 +56,8 @@
   background: var(--dsw-alias-state-business-primary);
 }
 
-button.leading {
-  cursor: pointer;
-}
-
-/* Hover preview on expandable rows: the idle tool icon crossfades (100ms)
-   into a down chevron before the row is opened. The chevron overlays the
-   icon cell absolutely so both can stay mounted for the opacity transition. */
-.iconIdle {
-  display: inline-flex;
-  opacity: 1;
-  transition: opacity 100ms ease;
-}
-
-.chevronHover {
-  position: absolute;
-  inset: 0;
-  margin: auto;
-  opacity: 0;
-  transition: opacity 100ms ease;
-}
-
-.row:hover .iconIdle {
-  opacity: 0;
-}
-
-.row:hover .chevronHover {
-  opacity: 1;
-}
-
 .title {
-  flex: none;
-  font-size: 14px;
-  line-height: 24px;
-  color: var(--dsw-alias-label-secondary);
+  font-weight: 400;
 }
 
 .sep {

packages/client/ui-conversation/src/client/chat/ToolRow.tsx

@@ -8,14 +8,17 @@
 // component-local view state. File-tool summaries are path links that open
 // through the host; the row itself is not a details-panel control.
 
-import { useState, type KeyboardEvent, type MouseEvent, type ReactNode } from 'react'
+import { useState, type MouseEvent, type ReactNode } from 'react'
 import { CodeBlock, StateDot, TerminalBlock } from '@deepseek-ai/dsh-client-ui-primitives'
-import { IconChevronDownOutline14 } from '@deepseek-ai/dsh-client-ui-primitives'
-import { CHAT_TERMINAL_MAX_LINES, type TerminalCardModel } from '../contract/terminal-card-model.ts'
+import type { TranslateNS } from '@deepseek-ai/dsh-client-ui-slots'
+import { CHAT_TERMINAL_MAX_LINES, terminalBlockLabels, type TerminalCardModel } from '../contract/terminal-card-model.ts'
 import type { ToolRowState, ToolRowVariant } from '../contract/tool-call-model.ts'
+import { DisclosureRow } from './DisclosureRow.tsx'
 import css from './ToolRow.module.css'
 
 export interface ToolRowProps {
+  /** The render site's conversation locale seat (terminal/code body copy). */
+  t: TranslateNS<'conversation'>
   variant: ToolRowVariant
   /** Wire tool name for tool-owned styling layered over the generic variant. */
   toolName?: string | undefined
@@ -56,6 +59,7 @@ function leadingFor(state: ToolRowState, icon: ReactNode): ReactNode {
 }
 
 export function ToolRow({
+  t,
   variant,
   toolName,
   icon,
@@ -82,63 +86,27 @@ export function ToolRow({
   // this substitution never shows.
   const text = body ?? ''
   const open = expanded && expandable
-  const rowExpands = expandable && expandOnRowClick
   const toggleExpand = () => {
     setExpanded(v => !v)
   }
-  const toggleFromLeading = (event: MouseEvent<HTMLButtonElement>) => {
-    event.stopPropagation()
-    toggleExpand()
-  }
-  const toggleFromKeyboard = (event: KeyboardEvent<HTMLDivElement>) => {
-    if (!rowExpands || (event.key !== 'Enter' && event.key !== ' ')) return
-    event.preventDefault()
-    toggleExpand()
-  }
   const openFile = (event: MouseEvent<HTMLButtonElement>) => {
     event.stopPropagation()
     if (filePath !== undefined) onOpenFile?.(filePath)
   }
-  // Expandable rows preview the toggle on hover: the tool icon yields to a
-  // down chevron (CSS swap on .row:hover); state dots still take precedence.
-  const collapsedIcon = expandable
-    ? (
-      <>
-        <span className={css.iconIdle}>{icon}</span>
-        <IconChevronDownOutline14 className={css.chevronHover} />
-      </>
-    )
-    : icon
-  const leading = open
-    ? <IconChevronDownOutline14 />
-    : leadingFor(state, collapsedIcon)
   return (
     <div className={css.root} data-variant={variant} data-tool={toolName} data-state={state}>
-      <div
-        className={css.row}
-        data-expandable={rowExpands || undefined}
-        role={rowExpands ? 'button' : undefined}
-        tabIndex={rowExpands ? 0 : undefined}
-        aria-expanded={rowExpands ? open : undefined}
-        onClick={rowExpands ? toggleExpand : undefined}
-        onKeyDown={rowExpands ? toggleFromKeyboard : undefined}
-      >
-        {expandable && !rowExpands ? (
-          <button
-            type="button"
-            className={css.leading}
-            aria-expanded={open}
-            onClick={toggleFromLeading}
-          >
-            {leading}
-          </button>
-        ) : (
-          <span className={css.leading}>
-            {leading}
-          </span>
-        )}
-        <span className={css.title}>{title}</span>
-        {!open && (
+      <DisclosureRow
+        rowClassName={css.row}
+        leadingClassName={css.leading}
+        titleClassName={css.title}
+        icon={leadingFor(state, icon)}
+        title={title}
+        open={open}
+        expandable={expandable}
+        expandOnRowClick={expandOnRowClick}
+        previewChevron={expandable && state !== 'error' && state !== 'stopped'}
+        onToggle={toggleExpand}
+        collapsedContent={(
           <>
             <span className={css.sep} aria-hidden />
             {fileLink ? (
@@ -154,18 +122,25 @@ export function ToolRow({
             )}
           </>
         )}
-      </div>
-      {/* The terminal presenter's description belongs ABOVE the card per the
-          render-intent contract, so an expanded terminal row keeps showing it
-          even though the collapsed summary is hidden while open. */}
-      {open && terminalBody?.description !== undefined && (
-        <div className={css.terminalDescription}>{terminalBody.description}</div>
-      )}
-      {open && (terminalBody !== null
-        ? <TerminalBlock {...terminalBody.card} maxLines={CHAT_TERMINAL_MAX_LINES} className={css.terminalBody} />
-        : variant === 'code'
-          ? <CodeBlock code={text} lang="typescript" className={css.codeBody} />
-          : <div className={css.body}>{text}</div>)}
+      >
+        {/* The terminal presenter's description belongs above the card per
+            the render-intent contract. */}
+        {terminalBody?.description !== undefined && (
+          <div className={css.terminalDescription}>{terminalBody.description}</div>
+        )}
+        {terminalBody !== null
+          ? (
+            <TerminalBlock
+              {...terminalBody.card}
+              maxLines={CHAT_TERMINAL_MAX_LINES}
+              labels={terminalBlockLabels(t)}
+              className={css.terminalBody}
+            />
+          )
+          : variant === 'code'
+            ? <CodeBlock code={text} lang="typescript" copyLabel={t('copy')} copiedLabel={t('copied')} className={css.codeBody} />
+            : <div className={css.body}>{text}</div>}
+      </DisclosureRow>
     </div>
   )
 }

packages/client/ui-conversation/src/client/chat/chat-flow.ts

@@ -3,15 +3,24 @@
  * results group into consecutive-run tool groups (figma step-summary flow,
  * VERTICAL gap10) alternating with narration; everything else passes through.
  * Item identity keys are stable across snapshots so the list parent can
- * subscribe to keys only while rows subscribe to content.
+ * subscribe to keys only while rows subscribe to content. IconActions ownership
+ * (last content assistant per turn) is derived here too so ChatView and the
+ * flow share one gate.
  */
-import type { ConversationNode, ToolResultNode } from '@deepseek-ai/dsh-client-runtime/client'
+import type {
+  AssistantBlock, ConversationNode, ToolResultNode,
+} from '@deepseek-ai/dsh-client-runtime/client'
 
 /** One renderable flow item; key is the React key and the parent's identity unit. */
 export type ChatFlowItem =
   | { kind: 'node'; key: string; node: ConversationNode }
   | { kind: 'tool-group'; key: string; results: readonly ToolResultNode[] }
 
+/** True when the node has model-visible text content worth IconActions chrome. */
+function hasContentText(blocks: readonly AssistantBlock[]): boolean {
+  return blocks.some(block => block.kind === 'text' && block.text.trim() !== '')
+}
+
 /** An assistant node that renders nothing: only tool-call heads (rows render
  *  via the grouping pass) and blank text/reasoning. Skipped by the flow so it
  *  neither costs column gaps nor splits a tool-row run. Interrupted nodes
@@ -22,6 +31,21 @@ function rendersNothing(node: ConversationNode): boolean {
       || ((b.kind === 'text' || b.kind === 'reasoning') && b.text.trim() === ''))
 }
 
+/**
+ * Seq set of assistants that own IconActions: the last content-text assistant
+ * in each turn. Mid-turn narration (text before tools) stays chrome-free.
+ * @param nodes - snapshot nodes (surface order).
+ * @returns Seq values ChatView may pass as `time` into AssistantMarkdown.
+ */
+export function assistantActionsSeqs(nodes: readonly ConversationNode[]): ReadonlySet<number> {
+  const lastByTurn = new Map<number, number>()
+  for (const node of nodes) {
+    if (node.kind !== 'assistant' || !hasContentText(node.blocks)) continue
+    lastByTurn.set(node.turn, node.seq)
+  }
+  return new Set(lastByTurn.values())
+}
+
 /**
  * Group finalized nodes into the step-summary flow.
  * @param nodes - snapshot nodes (surface order).

packages/client/ui-conversation/src/client/chat/message-chrome.ts

@@ -1,6 +1,11 @@
 // Shared chrome helpers for user/assistant IconActions rows: clipboard write
 // and the compact date+clock label from a session-event epoch.
 
+import type { Translate } from '@deepseek-ai/dsh-client-ui-slots'
+
+/** The date-template share of the conversation dictionary the clock consumes. */
+export type ClockTranslate = Translate<'clock.md' | 'clock.ymd'>
+
 /**
  * Best-effort clipboard write; rejections stay swallowed (no success chrome).
  * @param text - Plain text to place on the clipboard.
@@ -67,14 +72,16 @@ export function msUntilNextLocalMidnight(ms: number): number {
 }
 
 /**
- * Compact local timestamp for message IconActions.
- * Same calendar day → `HH:mm`; earlier this year → `M月D日 HH:mm`;
- * other years → `YYYY年M月D日 HH:mm`.
+ * Compact local timestamp for message IconActions. Same calendar day →
+ * `HH:mm`; earlier this year → the `clock.md` date template + clock; other
+ * years → the `clock.ymd` template + clock. Pure: the date templates arrive
+ * through the caller's locale seat.
  * @param time - Unix epoch ms from the source session event.
+ * @param t - translate seat supplying the `clock.md` / `clock.ymd` templates.
  * @param now - Reference instant for the day/year cut (defaults to wall clock).
  * @returns Date-aware clock string (24-hour, zero-padded time).
  */
-export function formatMessageClock(time: number, now: number = Date.now()): string {
+export function formatMessageClock(time: number, t: ClockTranslate, now: number = Date.now()): string {
   const d = new Date(time)
   const n = new Date(now)
   const clock = `${pad2(d.getHours())}:${pad2(d.getMinutes())}`
@@ -85,7 +92,7 @@ export function formatMessageClock(time: number, now: number = Date.now()): stri
   ) {
     return clock
   }
-  const md = `${d.getMonth() + 1}月${d.getDate()}日`
-  if (d.getFullYear() === n.getFullYear()) return `${md} ${clock}`
-  return `${d.getFullYear()}年${md} ${clock}`
+  const params = { y: d.getFullYear(), m: d.getMonth() + 1, d: d.getDate() }
+  const md = d.getFullYear() === n.getFullYear() ? t('clock.md', params) : t('clock.ymd', params)
+  return `${md} ${clock}`
 }

packages/client/ui-conversation/src/client/contract/slots.ts

@@ -1,7 +1,7 @@
 /** Conversation slot declarations and their composed component props. */
 import type { ReactNode, RefObject } from 'react'
 import type {
-  InjectFace, MaybeSnapshotSelectorHook, PropsRenderSlots, PropsRuntime, PropsStore, SnapshotSelectorHook,
+  InjectFace, MaybeSnapshotSelectorHook, PropsLocale, PropsRenderSlots, PropsRuntime, PropsStore, SnapshotSelectorHook,
 } from '@deepseek-ai/dsh-client-ui-slots'
 import type { CommandNode, ConversationSnapshot, ObservableSnapshot, PendingInteraction, PendingWait, SessionId, ToolCallBlock, WorkspaceId } from '@deepseek-ai/dsh-client-runtime/client'
 import type {} from '@deepseek-ai/dsh-client-ui-layout/client'
@@ -282,8 +282,6 @@ export interface ComposerBarInjected {
    * Resolves admission: false = rejected/unmatched/transport failure.
    */
   command: ((line: string) => Promise<boolean>) | undefined
-  /** Locale-aware hint translator for claimed command placeholders (session-independent — always present). */
-  translateHint: (key: string) => string
   /**
    * Registrant hooks compartment: the renderer binds these to
    * useNotices/useLexicon (static absent sources without a session — hook
@@ -306,11 +304,12 @@ export interface InputControlOwnerProps {
   locked: boolean
 }
 
-/** Full composer-bar component props: standard kit & owner share & control-seat render share & injected share (hooks compartment bound). */
+/** Full composer-bar props: standard kit & owner share & control-seat render share & injected share (hooks bound) & locale seat. */
 export type ComposerBarProps =
   PropsRuntime<'conversation.composer.bar'>
   & PropsRenderSlots<'conversation.input.plan' | 'conversation.input.model'>
   & InjectFace<ComposerBarInjected>
+  & PropsLocale<'conversation'>
 
 /**
  * Composer chain currency: what ConversationRoot dispatches at its
@@ -325,7 +324,8 @@ export interface ComposerChainProps {
 
 /**
  * Full conversation-slot component props: runtime & child-render (view ring
- * + composer chain/bar + input-region + hero picker slots) & store & injected shares.
+ * + composer chain/bar + input-region + hero picker slots) & store & injected
+ * shares & the locale seat.
  */
 export type ConversationSlotProps =
   PropsRuntime<'conversation'> & PropsRenderSlots<
@@ -336,13 +336,15 @@ export type ConversationSlotProps =
     | 'conversation.hero.workspace'
   >
   & ConversationInjected
+  & PropsLocale<'conversation'>
 
-/** Full strict-session content props: per-session store, view ring, and callbacks. */
+/** Full strict-session content props: per-session store, view ring, callbacks, and the locale seat. */
 export type ConversationSessionSlotProps =
   PropsRuntime<'conversation.session'>
   & PropsRenderSlots<'conversation.view'>
   & PropsStore<ChatStore>
   & ConversationSessionInjected
+  & PropsLocale<'conversation'>
 
 /** The pending approval carrier the owner dispatches into the composer chain. */
 export type ApprovalWait = PendingWait<'approval'>
@@ -400,11 +402,13 @@ export class PendingApproval {
 /**
  * Full approval-composer props: the framework runtime share (chain currency +
  * session/global standard kit) plus the chain `matched` share — the entry's
- * selector result, already narrowed to the approval carrier. No injected
- * share: the carrier plus the domain face above carry the whole behavior
- * surface; the paired command line derives from useSession in-component.
+ * selector result, already narrowed to the approval carrier — plus the
+ * standard locale seat. No injected share: the carrier plus the domain face
+ * above carry the whole behavior surface; the paired command line derives
+ * from useSession in-component.
  */
-export type ApprovalComposerProps = PropsRuntime<'conversation.composer'> & { matched: ApprovalWait }
+export type ApprovalComposerProps =
+  PropsRuntime<'conversation.composer'> & { matched: ApprovalWait } & PropsLocale<'conversation'>
 
 /**
  * Injected share of the chat view entry: the two callbacks whose targets live
@@ -419,12 +423,14 @@ export interface ChatViewInjected {
    */
   openFile: (path: string) => void
   loadOlder: () => void
+  /** Fork the session through the turn containing the message at `seq`, then open the child. */
+  forkAt: (seq: number) => void
 }
 
-/** Full chat-view component props: runtime share & the declared toolview/commandview holes' render share & store share & injected share. */
+/** Full chat-view component props: runtime & the declared toolview/commandview holes' render share & store & injected & locale seat. */
 export type ChatViewSlotProps =
   PropsRuntime<'conversation.view'> & PropsRenderSlots<'conversation.chat.toolview' | 'conversation.chat.commandview'>
-  & PropsStore<ChatStore> & ChatViewInjected
+  & PropsStore<ChatStore> & ChatViewInjected & PropsLocale<'conversation'>
 
 /**
  * Injected share of the details slot: the panel is otherwise a pure reader of
@@ -435,8 +441,8 @@ export interface DetailsInjected {
   closeDetails: () => void
 }
 
-/** Full details-slot component props: selection arrives through the shared store, call material through useSession. */
-export type DetailsSlotProps = PropsRuntime<'details'> & PropsStore<ChatStore> & DetailsInjected
+/** Full details-slot component props: selection rides the shared store, call material useSession; copy the locale seat. */
+export type DetailsSlotProps = PropsRuntime<'details'> & PropsStore<ChatStore> & DetailsInjected & PropsLocale<'conversation'>
 
 /** Owner share common to the hero / New-Session Workspace pickers. */
 export interface EmptyWorkspaceOwnerProps {

packages/client/ui-conversation/src/client/contract/terminal-card-model.ts

@@ -8,9 +8,35 @@
  * are derived once.
  * @module
  */
-import type { TerminalBlockProps } from '@deepseek-ai/dsh-client-ui-primitives'
+import type { TerminalBlockLabels, TerminalBlockProps } from '@deepseek-ai/dsh-client-ui-primitives'
+import type { TranslateNS } from '@deepseek-ai/dsh-client-ui-slots'
 import { resolveToolPath, type ToolCallBlock } from './tool-call-model.ts'
 
+/**
+ * Build the TerminalBlock display copy from the conversation locale seat —
+ * the one place the primitive's label surface pairs with this package's
+ * dictionary, shared by every terminal render site (chat row, bash row,
+ * details panel).
+ * @param t - the render site's conversation locale seat.
+ * @returns the full label set for {@link TerminalBlockProps}'s `labels`.
+ */
+export function terminalBlockLabels(t: TranslateNS<'conversation'>): TerminalBlockLabels {
+  return {
+    signal: signal => t('terminal.signal', { signal }),
+    exitCode: code => t('terminal.exitCode', { code }),
+    running: t('terminal.running'),
+    failed: t('terminal.failed'),
+    done: t('terminal.done'),
+    copy: t('copy'),
+    copied: t('copied'),
+    noOutput: t('terminal.noOutput'),
+    collapseAria: t('terminal.collapseAria'),
+    collapse: t('collapse'),
+    expandAria: hidden => t('terminal.expandAria', { n: hidden }),
+    expand: hidden => t('terminal.expandRest', { n: hidden }),
+  }
+}
+
 /**
  * Output lines the chat row's expanded terminal body shows before collapsing
  * the middle — half the primitive's own default, which the details panel

packages/client/ui-conversation/src/client/index.ts

@@ -11,6 +11,7 @@ export type {
   CallId, ChatStoreState, SelectionTarget, ViewTab,
 } from './contract/views.ts'
 export type { ToolCallBlock } from './contract/tool-call-model.ts'
+export type { ConversationKey } from './locales.ts'
 export type {
   ChatStore, ChatViewInjected, ChatViewSlotProps, CommandRowOwnerProps, CommandRowProps, ComposerBarInjected,
   ComposerChainProps, ConversationInjected,

packages/client/ui-conversation/src/client/locales.ts

@@ -0,0 +1,170 @@
+/** `conversation` namespace dictionaries. */
+
+/** Dictionary namespace owned by this plugin. */
+export const NS = 'conversation'
+
+// The claimed /plan hint and the plan-mode textarea placeholder share one
+// string: both describe the same next action.
+const PLAN_NEXT_ACTION_ZH = '描述你的任务以生成计划'
+const PLAN_NEXT_ACTION_EN = 'describe your task to generate plan'
+
+/** Simplified Chinese dictionary (the key-set source of truth). */
+export const zh = {
+  'view.chat': '对话',
+  'hint.plan': PLAN_NEXT_ACTION_ZH,
+  'hint.goal': '输入目标，智能体将持续执行',
+  'hint.goal.active': '当前目标进行中。可输入 edit 修改 / pause 暂停 / resume 继续 / clear 清除',
+  'placeholder.plan': PLAN_NEXT_ACTION_ZH,
+  'placeholder.default': '给智能体发消息',
+  'placeholder.unavailable': '会话不可用',
+  'placeholder.hero': '描述你想要构建的内容',
+  'placeholder.workspace': '选择一个工作区开始',
+  'input.addAttachment': '添加附件',
+  'input.stop': '停止生成',
+  'input.send': '发送消息',
+  'input.accessMode': '访问模式，当前：{name}',
+  'hero.headline': '开始构建吧',
+  'hero.chooseWorkspace': '选择工作区',
+  'session.hierarchy': '会话层级',
+  'details.title': '详情',
+  'details.close': '关闭详情',
+  'details.empty': '点击消息流中的工具行查看详情',
+  'details.notInWindow': '该调用不在当前窗口内',
+  'details.input': '输入',
+  'details.output': '输出',
+  'details.running': '运行中…',
+  'todo.title': '任务清单',
+  'todo.progress': '{done}/{total} 项任务 · {active} 项进行中',
+  'todo.rowTitle': '更新任务清单',
+  'todo.completed': '{done}/{total} 已完成',
+  'chat.loadingHistory': '载入历史…',
+  'chat.loadError': '历史加载失败：{message}（{code}）',
+  'chat.loadOlder': '加载更早',
+  'chat.toBottom': '回到底部',
+  'message.extraBlock': '附加内容块',
+  'message.steering': '插话',
+  'message.contextInjection': '上下文注入',
+  'message.unknownSurface': '未知 surface 事件：{type}',
+  'message.unknownBlock': '未知内容块',
+  'message.stopped': '已停止',
+  'message.branch': '在新对话中分支',
+  'command.running': '执行中…',
+  'command.failed': '命令失败',
+  'command.done': '已完成',
+  'command.title': '命令',
+  'approval.waiting': '等待审批',
+  'approval.detail.aria': '审批详情',
+  'approval.escalation': '工具 {toolName} 请求越权执行',
+  'approval.reject': '拒绝',
+  'approval.allowOnce': '允许一次',
+  'ask.rowTitle': '提问',
+  'ask.waiting': '等待回答',
+  'ask.cancelled': '已取消',
+  'ask.interrupted': '已中断',
+  'ask.answered': '{answered}/{total} 已回答',
+  'bash.running': '运行中',
+  'bash.failed': '失败',
+  'bash.stopped': '已停止',
+  'queue.count': '{n} 条排队消息',
+  'queue.edit': '编辑排队消息',
+  'queue.edit.unsupported': '包含非文本内容，暂不支持编辑',
+  'queue.save': '保存排队消息',
+  'queue.cancelEdit': '取消编辑',
+  'queue.remove': '删除排队消息',
+  'queue.editFailed': '编辑失败：这条消息可能已经开始发送。',
+  'queue.removeFailed': '删除失败：这条消息可能已经开始发送。',
+  'terminal.signal': '信号 {signal}',
+  'terminal.exitCode': '退出码 {code}',
+  'terminal.running': '运行中',
+  'terminal.failed': '失败',
+  'terminal.done': '已完成',
+  'terminal.noOutput': '无输出',
+  'terminal.collapseAria': '收起输出',
+  'terminal.expandAria': '展开其余 {n} 行输出',
+  'terminal.expandRest': '… 其余 {n} 行',
+  'json.truncated': '… 已截断，共 {total} 字符',
+  'clock.md': '{m}月{d}日',
+  'clock.ymd': '{y}年{m}月{d}日',
+} satisfies Record<string, string>
+
+/** The conversation namespace key union. */
+export type ConversationKey = keyof typeof zh
+
+/** English dictionary, checked complete against the zh key set. */
+export const en = {
+  'view.chat': 'Chat',
+  'hint.plan': PLAN_NEXT_ACTION_EN,
+  'hint.goal': 'describe the objective for a long-running task',
+  'hint.goal.active': 'goal active — edit / pause / resume / clear',
+  'placeholder.plan': PLAN_NEXT_ACTION_EN,
+  'placeholder.default': 'Message the agent',
+  'placeholder.unavailable': 'Session unavailable',
+  'placeholder.hero': 'Describe what you want to build',
+  'placeholder.workspace': 'Choose a workspace to start',
+  'input.addAttachment': 'Add attachment',
+  'input.stop': 'Stop generating',
+  'input.send': 'Send message',
+  'input.accessMode': 'Access mode, current: {name}',
+  'hero.headline': 'Let\'s start building',
+  'hero.chooseWorkspace': 'Choose workspace',
+  'session.hierarchy': 'Session hierarchy',
+  'details.title': 'Details',
+  'details.close': 'Close details',
+  'details.empty': 'Click a tool row in the message flow to view its details',
+  'details.notInWindow': 'This call is outside the current window',
+  'details.input': 'Input',
+  'details.output': 'Output',
+  'details.running': 'Running…',
+  'todo.title': 'To-dos',
+  'todo.progress': '{done}/{total} tasks · {active} in progress',
+  'todo.rowTitle': 'Update to-do list',
+  'todo.completed': '{done}/{total} completed',
+  'chat.loadingHistory': 'Loading history…',
+  'chat.loadError': 'Failed to load history: {message} ({code})',
+  'chat.loadOlder': 'Load earlier',
+  'chat.toBottom': 'Back to bottom',
+  'message.extraBlock': 'Extra content block',
+  'message.steering': 'Interjection',
+  'message.contextInjection': 'Context injection',
+  'message.unknownSurface': 'Unknown surface event: {type}',
+  'message.unknownBlock': 'Unknown content block',
+  'message.stopped': 'Stopped',
+  'message.branch': 'Branch into a new conversation',
+  'command.running': 'Running…',
+  'command.failed': 'Command failed',
+  'command.done': 'Completed',
+  'command.title': 'Command',
+  'approval.waiting': 'Waiting for approval',
+  'approval.detail.aria': 'Approval details',
+  'approval.escalation': 'Tool {toolName} requests privileged execution',
+  'approval.reject': 'Reject',
+  'approval.allowOnce': 'Allow once',
+  'ask.rowTitle': 'Ask question',
+  'ask.waiting': 'waiting',
+  'ask.cancelled': 'cancelled',
+  'ask.interrupted': 'interrupted',
+  'ask.answered': '{answered}/{total} answered',
+  'bash.running': 'Running',
+  'bash.failed': 'Failed',
+  'bash.stopped': 'Stopped',
+  'queue.count': '{n} queued messages',
+  'queue.edit': 'Edit queued message',
+  'queue.edit.unsupported': 'Contains non-text content; editing is not supported yet',
+  'queue.save': 'Save queued message',
+  'queue.cancelEdit': 'Cancel editing',
+  'queue.remove': 'Remove queued message',
+  'queue.editFailed': 'Edit failed: this message may have already started sending.',
+  'queue.removeFailed': 'Removal failed: this message may have already started sending.',
+  'terminal.signal': 'signal {signal}',
+  'terminal.exitCode': 'exit code {code}',
+  'terminal.running': 'Running',
+  'terminal.failed': 'Failed',
+  'terminal.done': 'Done',
+  'terminal.noOutput': 'No output',
+  'terminal.collapseAria': 'Collapse output',
+  'terminal.expandAria': 'Expand the remaining {n} output lines',
+  'terminal.expandRest': '… {n} more lines',
+  'json.truncated': '… truncated, {total} characters total',
+  'clock.md': '{m}/{d}',
+  'clock.ymd': '{y}-{m}-{d}',
+} satisfies Record<ConversationKey, string>

packages/client/ui-conversation/src/client/queue/QueueDock.module.css

@@ -5,9 +5,11 @@
   flex: none;
   width: 100%;
   max-width: 776px;
-  /* Eat InputBar's 6px top padding and tuck the panel 2px under the card;
-     the later composer sibling paints its surface and shadow over this edge. */
-  margin: 0 auto -10px;
+  /* Flex gap still applies after this item; subtract it together with the
+     design's overlap so the later composer paints over the queue edge. */
+  margin: 0 auto calc(
+    0px - var(--dsh-composer-stack-gap) - var(--dsh-queue-composer-overlap)
+  );
   padding: 2px 12px;
 }
 
@@ -18,6 +20,8 @@
   padding-top: 2px;
   border-radius: 14px 14px 0 0;
   background: var(--dsw-specific-tip);
+  --dsh-scrollbar-thumb: var(--dsw-alias-scrollbar-bg-l2);
+  --dsh-scrollbar-thumb-hover: var(--dsw-alias-scrollbar-hover-l2);
 }
 
 .panel::after {
@@ -30,7 +34,52 @@
   pointer-events: none;
 }
 
+.header {
+  box-sizing: border-box;
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  width: 100%;
+  height: 36px;
+  padding: 4px 16px 4px 12px;
+  border: none;
+  border-radius: 8px;
+  background: transparent;
+  color: var(--dsw-alias-label-primary);
+  text-align: left;
+  cursor: pointer;
+}
+
+.header:focus-visible {
+  outline: 2px solid var(--dsw-alias-label-tertiary);
+  outline-offset: -2px;
+}
+
+.header:disabled {
+  cursor: default;
+}
+
+.count {
+  flex: 1 1 auto;
+  min-width: 0;
+  font-family: Inter, var(--dsw-font-family);
+  font-size: 14px;
+  font-weight: 500;
+  line-height: 24px;
+}
+
+.chevron {
+  display: grid;
+  flex: none;
+  place-items: center;
+  width: 14px;
+  height: 14px;
+  color: var(--dsw-alias-label-tertiary);
+}
+
 .list {
+  max-height: 180px;
+  overflow-y: auto;
   margin: 0;
   padding: 0;
   list-style: none;

packages/client/ui-conversation/src/client/queue/QueueDock.tsx

@@ -4,13 +4,15 @@
 // The 'conversation.input.dock' SlotMap declaration lives in
 // ../contract/slots.ts beside the other input-region slots.
 import type { Context } from 'cordis'
-import { useEffect, useState } from 'react'
-import type { PropsRuntime } from '@deepseek-ai/dsh-client-ui-slots'
+import { useEffect, useId, useState } from 'react'
+import type { PropsLocale, PropsRuntime } from '@deepseek-ai/dsh-client-ui-slots'
 import type { SessionId } from '@deepseek-ai/dsh-client-runtime/client'
 import {
-  IconCheckOutline16, IconCloseOutline16, IconEditOutline16, IconTrashOutline16,
+  IconCheckOutline16, IconChevronDownOutline14, IconChevronUpOutline14,
+  IconCloseOutline16, IconEditOutline16, IconTrashOutline16,
 } from '@deepseek-ai/dsh-client-ui-primitives'
 import type { QueueAction, QueueItemId } from '../contract/queue.ts'
+import { NS } from '../locales.ts'
 import css from './QueueDock.module.css'
 
 /** Queue operations injected by the session-scoped registration. */
@@ -19,21 +21,31 @@ export interface QueueDockInjected {
   notify: (level: 'info' | 'error', text: string) => void
 }
 
-/** Full props of a dock entry: InputZone owner share + session standard kit + global seat. */
-export type QueueDockProps = PropsRuntime<'conversation.input.dock'> & QueueDockInjected
+/** Full props of a dock entry: InputZone owner share + session standard kit + global seat + the locale seat. */
+export type QueueDockProps = PropsRuntime<'conversation.input.dock'> & QueueDockInjected & PropsLocale<'conversation'>
 
-/** Queue strip: one preview line per queued message; renders null when the queue is empty. */
-export function QueueDock({ useSession, updateQueue, notify }: QueueDockProps) {
+/**
+ * Queue strip: one item renders directly; multiple items default to a
+ * collapsible count header; an empty queue renders nothing.
+ */
+export function QueueDock({ useSession, updateQueue, notify, t }: QueueDockProps) {
   const queue = useSession(s => s.queue)
   const [editing, setEditing] = useState<{ id: QueueItemId; text: string } | null>(null)
   const [busy, setBusy] = useState<QueueItemId | null>(null)
+  const [collapsed, setCollapsed] = useState(true)
+  const listId = useId()
 
   useEffect(() => {
+    if (queue.length === 0 && !collapsed) setCollapsed(true)
     if (editing !== null && !queue.some(row => row.id === editing.id)) setEditing(null)
-  }, [editing, queue])
+  }, [collapsed, editing, queue])
 
   if (queue.length === 0) return null
 
+  const interactionActive = editing !== null || busy !== null
+  const expanded = !collapsed || interactionActive
+  const listVisible = queue.length === 1 || expanded
+
   const applyAction = async (
     itemId: QueueItemId,
     action: QueueAction,
@@ -56,22 +68,37 @@ export function QueueDock({ useSession, updateQueue, notify }: QueueDockProps) {
     if (await applyAction(
       editing.id,
       { kind: 'edit', content: [{ type: 'text', text: editing.text }] },
-      '编辑失败：这条消息可能已经开始发送。',
+      t('queue.editFailed'),
     )) setEditing(null)
   }
 
   return (
     <div className={css.dock}>
       <div className={css.panel}>
-        <ul className={css.list}>
-          {queue.map(row => (
+        {queue.length > 1 && (
+          <button
+            type="button"
+            className={css.header}
+            aria-controls={listId}
+            aria-expanded={expanded}
+            disabled={interactionActive}
+            onClick={() => { setCollapsed(value => !value) }}
+          >
+            <span className={css.count}>{t('queue.count', { n: queue.length })}</span>
+            <span className={css.chevron} aria-hidden>
+              {expanded ? <IconChevronDownOutline14 /> : <IconChevronUpOutline14 />}
+            </span>
+          </button>
+        )}
+        <ul id={listId} className={css.list} hidden={!listVisible}>
+          {listVisible && queue.map(row => (
             <li key={row.id} className={css.row}>
               {editing?.id === row.id
                 ? (
                   <input
                     autoFocus
                     className={css.editor}
-                    aria-label="编辑排队消息"
+                    aria-label={t('queue.edit')}
                     value={editing.text}
                     onChange={(event) => { setEditing({ id: row.id, text: event.currentTarget.value }) }}
                     onKeyDown={(event) => {
@@ -94,8 +121,8 @@ export function QueueDock({ useSession, updateQueue, notify }: QueueDockProps) {
                       <button
                         type="button"
                         className={css.action}
-                        aria-label="保存排队消息"
-                        title="保存排队消息"
+                        aria-label={t('queue.save')}
+                        title={t('queue.save')}
                         disabled={busy !== null || editing.text.trim() === ''}
                         onClick={() => { void saveEdit() }}
                       >
@@ -104,8 +131,8 @@ export function QueueDock({ useSession, updateQueue, notify }: QueueDockProps) {
                       <button
                         type="button"
                         className={css.action}
-                        aria-label="取消编辑"
-                        title="取消编辑"
+                        aria-label={t('queue.cancelEdit')}
+                        title={t('queue.cancelEdit')}
                         disabled={busy !== null}
                         onClick={() => { setEditing(null) }}
                       >
@@ -118,8 +145,8 @@ export function QueueDock({ useSession, updateQueue, notify }: QueueDockProps) {
                       <button
                         type="button"
                         className={css.action}
-                        aria-label="编辑排队消息"
-                        title={row.text === null ? '包含非文本内容，暂不支持编辑' : '编辑排队消息'}
+                        aria-label={t('queue.edit')}
+                        title={row.text === null ? t('queue.edit.unsupported') : t('queue.edit')}
                         disabled={busy !== null || row.text === null}
                         onClick={() => {
                           if (row.text !== null) setEditing({ id: row.id, text: row.text })
@@ -130,14 +157,14 @@ export function QueueDock({ useSession, updateQueue, notify }: QueueDockProps) {
                       <button
                         type="button"
                         className={css.action}
-                        aria-label="删除排队消息"
-                        title="删除排队消息"
+                        aria-label={t('queue.remove')}
+                        title={t('queue.remove')}
                         disabled={busy !== null}
                         onClick={() => {
                           void applyAction(
                             row.id,
                             { kind: 'remove' },
-                            '删除失败：这条消息可能已经开始发送。',
+                            t('queue.removeFailed'),
                           )
                         }}
                       >
@@ -162,14 +189,15 @@ export const queueDockEntry = {
   name: 'conversation-queue-dock',
   inject: ['slots', 'conversation', 'sessions'],
   /**
-   * Register the queue strip into the input dock (list entry, order 0).
+   * Register the queue strip as the terminal input-dock entry (order 20).
    * @param ctx - registrant context (disposal rides ctx.effect inside slots.register).
    */
   apply(ctx: Context): void {
     ctx.slots.register({
       name: 'conversation.input.dock',
       id: 'queue',
-      order: 0,
+      order: 20,
+      locale: NS,
       inject: (sessionId: SessionId): QueueDockInjected => {
         const actx = ctx.sessions.scope(sessionId)
         if (actx === undefined) throw new Error(`queue dock: session "${sessionId}" resolved no scope`)

packages/client/ui-conversation/src/client/skeleton/ApprovalPanel.module.css

@@ -19,6 +19,13 @@
   border-radius: 20px;
   background: var(--dsw-specific-input-major);
   box-shadow: var(--dsw-shadow-lv2);
+  /* Elevated surface in dark, same as the menus: `.body` inside scrolls once
+     the justification or command passes the cap, so the thumb takes the l2
+     pair. Declared on the card because the elevation belongs to the surface,
+     and the custom properties inherit down to the region that actually
+     scrolls (see ui-theme styles/scrollbar.css for the rebinding contract). */
+  --dsh-scrollbar-thumb: var(--dsw-alias-scrollbar-bg-l2);
+  --dsh-scrollbar-thumb-hover: var(--dsw-alias-scrollbar-hover-l2);
 }
 
 /* Tinted full-width header band. */
@@ -40,11 +47,22 @@
   background: var(--dsw-alias-state-warn-primary);
 }
 
+/* Scroll region: an agent's justification and its command are unbounded model
+   text (a one-line `cd` or a 40-line heredoc), and the seat sits in a
+   fixed-height column — uncapped, a long command pushed the action row past
+   the viewport and the approval could not be answered at all. The strip and
+   the action row stay outside, so the buttons are always on screen. */
 .body {
   display: flex;
   flex-direction: column;
   gap: 6px;
-  padding: 12px 16px 14px;
+  /* border-box so the cap is the region's OUTER height: the composer's draft
+     area counts its padding inside the same number, and the two seats are
+     only interchangeable if they occupy the same box. */
+  box-sizing: border-box;
+  max-height: var(--dsh-composer-text-max-height);
+  overflow-y: auto;
+  padding: 12px 16px 0;
 }
 
 /* The model's justification is the panel's message, not a footnote. */
@@ -63,11 +81,15 @@
   word-break: break-all;
 }
 
+/* Card-level row, not body content. Its padding reproduces the metrics the row
+   had inside the body: 14px above (the flex gap of 6 plus the row's 8px top
+   margin, neither of which reaches it out here) and the body's former 14px
+   bottom pad below, so the resting card is unchanged. */
 .actionRow {
   display: flex;
   justify-content: flex-end;
   gap: 8px;
-  margin-top: 8px;
+  padding: 14px 16px 14px;
 }
 
 .allow,

packages/client/ui-conversation/src/client/skeleton/ApprovalPanel.tsx

@@ -4,7 +4,11 @@
 // pending, this panel occupies the composer slot in place of the InputBar:
 // an amber "Waiting for approval" strip on the card top, the model's
 // justification as the headline, the paired command in muted code text, and
-// a right-aligned refuse/allow action row. One-shot: the buttons disable
+// a right-aligned refuse/allow action row. Justification and command are
+// unbounded model text, so they scroll inside the card at the shared composer
+// cap (`data-approval-scroll`) and the action row stays outside it — the
+// buttons must be reachable no matter how long the command is.
+// One-shot: the buttons disable
 // after a click and the panel leaves (the InputBar returns) on the broadcast
 // resolved frame. The draft's "Always allow this type" is deferred with
 // grant storage.
@@ -37,10 +41,14 @@ export function ApprovalPanel(props: ApprovalComposerProps) {
   const approval = useMemo(() => new PendingApproval(props.matched), [props.matched])
   const command = props.useSession(s => commandOf(
     approval.callId === undefined ? undefined : s.runningCalls.find(call => call.callId === approval.callId)))
-  return <ApprovalFlow key={approval.key} pending={approval} {...command === undefined ? {} : { command }} />
+  return <ApprovalFlow key={approval.key} pending={approval} t={props.t} {...command === undefined ? {} : { command }} />
 }
 
-function ApprovalFlow({ pending, command }: { pending: PendingApproval; command?: string }) {
+function ApprovalFlow({ pending, command, t }: {
+  pending: PendingApproval
+  command?: string
+  t: ApprovalComposerProps['t']
+}) {
   // Local one-shot latch: the panel leaves only when the resolved frame
   // lands; until then the buttons must not re-fire. An answer failure
   // (rejected receipt / transport) re-arms them for retry.
@@ -52,18 +60,21 @@ function ApprovalFlow({ pending, command }: { pending: PendingApproval; command?
   return (
     <div className={css.root} data-approval-key={pending.key}>
       <div className={css.card}>
-        <div className={css.strip}><span className={css.dot} />等待审批</div>
-        <div className={css.body}>
-          <div className={css.headline}>{pending.reason ?? `工具 ${pending.toolName} 请求越权执行`}</div>
+        <div className={css.strip}><span className={css.dot} />{t('approval.waiting')}</div>
+        {/* Tab stop: the region scrolls once the command passes the cap and
+            holds nothing focusable of its own, so without one a keyboard-only
+            user cannot reach the command's tail before answering. */}
+        <div className={css.body} data-approval-scroll="" tabIndex={0} role="group" aria-label={t('approval.detail.aria')}>
+          <div className={css.headline}>{pending.reason ?? t('approval.escalation', { toolName: pending.toolName })}</div>
           {command !== undefined && <div className={css.command}>{command}</div>}
-          <div className={css.actionRow}>
-            <button type="button" className={css.reject} disabled={answered} onClick={() => { answer('rejected') }}>
-              拒绝
-            </button>
-            <button type="button" className={css.allow} disabled={answered} onClick={() => { answer('allowed-once') }}>
-              允许一次
-            </button>
-          </div>
+        </div>
+        <div className={css.actionRow}>
+          <button type="button" className={css.reject} disabled={answered} onClick={() => { answer('rejected') }}>
+            {t('approval.reject')}
+          </button>
+          <button type="button" className={css.allow} disabled={answered} onClick={() => { answer('allowed-once') }}>
+            {t('approval.allowOnce')}
+          </button>
         </div>
       </div>
     </div>

packages/client/ui-conversation/src/client/skeleton/ConversationRoot.module.css

@@ -127,14 +127,15 @@
   min-height: 0;
 }
 
-/* Composer stack: dock strips above the input card (design §6 MIX order).
-   The stack owns the vertical rhythm: one gap here, entries carry no outer
-   margins — an entry that renders null costs nothing, so spacing stays
-   correct for any dock combination. */
+/* Composer context stack (Figma 9:937): standalone dock cards share one
+   rhythm; the terminal queue strip additionally tucks under the input card. */
 .composerStack {
+  --dsh-composer-stack-gap: 6px;
+  --dsh-queue-composer-overlap: 5px;
+
   display: flex;
   flex-direction: column;
-  gap: 8px;
+  gap: var(--dsh-composer-stack-gap);
 }
 
 /* Common seat for the composer chain (fallback + elected overlay siblings). */
@@ -142,6 +143,14 @@
   display: flex;
   flex: none;
   flex-direction: column;
+  /* One cap for every scrolling text region a composer seat can hold: the
+     InputBar draft (figma Input 75:8208 max 14 lines × 24px line) and the
+     takeover panels' bodies top out at the same height, so electing a
+     takeover never grows the footer past the card it replaces. Declared on
+     the seat because it is the chain's only shared ancestor — fallback and
+     elected overlay are siblings — and custom properties inherit down to
+     whichever entry is mounted. */
+  --dsh-composer-text-max-height: 336px;
 }
 
 /* Active phase: header is ordinary column chrome above the scrollport (not

packages/client/ui-conversation/src/client/skeleton/ConversationRoot.tsx

@@ -14,7 +14,7 @@ export type ConversationRootProps = ConversationSlotProps
 
 export function ConversationRoot({
   sessionId, useSession, useSessions, useWorkspaces, useInput,
-  renderSlot, renderSlotChain, selectWorkspace,
+  renderSlot, renderSlotChain, selectWorkspace, t,
 }: ConversationRootProps) {
   const openState = useSession(s => s.openState)
   const composerPhase = useSession(s => s.composerPhase)
@@ -94,6 +94,7 @@ export function ConversationRoot({
         label={chipTitle}
         menuOpen={pickerOpen}
         onClick={() => { setPickerOpen(open => !open) }}
+        t={t}
       />
       {renderSlot('conversation.hero.workspace', {
         open: pickerOpen,
@@ -120,8 +121,8 @@ export function ConversationRoot({
   const inputBar = renderSlot('conversation.composer.bar', {
     variant: hero ? 'hero' : 'composer',
     ...(inert
-      ? { disabled: true, placeholder: 'Choose a workspace to start' }
-      : hero ? { placeholder: 'Describe what you want to build' } : {}),
+      ? { disabled: true, placeholder: t('placeholder.workspace') }
+      : hero ? { placeholder: t('placeholder.hero') } : {}),
     overlay: renderSlot('conversation.input.overlay', {}),
     leftItems: zone === undefined ? null : renderSlot('conversation.input.left', zone),
     rightItems: zone === undefined ? null : renderSlot('conversation.input.right', zone),
@@ -133,7 +134,7 @@ export function ConversationRoot({
   const composerBar = (
     <div className={clsx(css.composerStack, hero && css.composerHero)}>
       {hero && <HeroGlow className={css.heroGlow} />}
-      {hero && <HeroShell />}
+      {hero && <HeroShell t={t} />}
       {hero && heroWorkspaceRow}
       {!hero && zone !== undefined && renderSlot('conversation.input.dock', zone)}
       {inputBar}

packages/client/ui-conversation/src/client/skeleton/ConversationSession.tsx

@@ -24,7 +24,7 @@ function deriveAncestry(list: SessionListState, id: SessionId): readonly Session
 
 export function ConversationSession({
   sessionId, useSession, useSessions, useInput, inputActions, useStore, actions,
-  renderSlot, views, bindDraftMirror, open, wrapActiveBody,
+  renderSlot, views, bindDraftMirror, open, wrapActiveBody, t,
 }: ConversationSessionProps) {
   useSyncExternalStore(views.subscribe, views.version)
   const tabs = views.list()
@@ -65,7 +65,7 @@ export function ConversationSession({
         {!hideChrome && (
           <>
             <div className={css.crumbRow}>
-              <nav className={css.crumbs} aria-label="Session hierarchy">
+              <nav className={css.crumbs} aria-label={t('session.hierarchy')}>
                 {ancestry.map((summary, index) => {
                   const last = index === ancestry.length - 1
                   return (

packages/client/ui-conversation/src/client/skeleton/DetailsPanel.tsx

@@ -11,7 +11,7 @@ import { CodeBlock, TerminalBlock } from '@deepseek-ai/dsh-client-ui-primitives'
 import { shallowEqual } from '@deepseek-ai/dsh-client-runtime/client'
 import type { ConversationSnapshot, RunningToolCall, ToolResultNode } from '@deepseek-ai/dsh-client-runtime/client'
 import type { DetailsSlotProps } from '../contract/slots.ts'
-import { terminalCardModel } from '../contract/terminal-card-model.ts'
+import { terminalBlockLabels, terminalCardModel } from '../contract/terminal-card-model.ts'
 import type { ToolCallBlock } from '../contract/tool-call-model.ts'
 import css from './DetailsPanel.module.css'
 
@@ -68,7 +68,7 @@ function pretty(raw: string): string {
   }
 }
 
-export function DetailsPanel({ useSession, useSessions, sessionId, useStore, closeDetails }: DetailsPanelProps) {
+export function DetailsPanel({ useSession, useSessions, sessionId, useStore, closeDetails, t }: DetailsPanelProps) {
   const selection = useStore(s => s.selection)
   // Session workspace root: an omitted or relative terminal cwd resolves
   // against it, which the pure presenter cannot see.
@@ -84,10 +84,10 @@ export function DetailsPanel({ useSession, useSessions, sessionId, useStore, clo
     <div className={css.root}>
       <div className={css.header}>
         <div className={css.title}>
-          {selection === null ? '详情' : material?.name ?? selection.toolName ?? '详情'}
+          {selection === null ? t('details.title') : material?.name ?? selection.toolName ?? t('details.title')}
         </div>
         <button
-          type="button" className={css.close} aria-label="关闭详情"
+          type="button" className={css.close} aria-label={t('details.close')}
           onClick={() => { closeDetails() }}
         >
           <svg viewBox="0 0 16 16" width="14" height="14" aria-hidden>
@@ -97,24 +97,24 @@ export function DetailsPanel({ useSession, useSessions, sessionId, useStore, clo
       </div>
       <div className={css.body}>
         {selection === null || callId === undefined
-          ? <div className={css.empty}>点击消息流中的工具行查看详情</div>
+          ? <div className={css.empty}>{t('details.empty')}</div>
           : material === null
-            ? <div className={css.empty}>该调用不在当前窗口内</div>
+            ? <div className={css.empty}>{t('details.notInWindow')}</div>
             : (
               <>
                 {material.argsRaw !== null && (
                   <section className={css.section}>
-                    <div className={css.sectionLabel}>Input</div>
-                    <CodeBlock code={pretty(material.argsRaw)} lang="json" />
+                    <div className={css.sectionLabel}>{t('details.input')}</div>
+                    <CodeBlock code={pretty(material.argsRaw)} lang="json" copyLabel={t('copy')} copiedLabel={t('copied')} />
                   </section>
                 )}
                 <section className={css.section}>
-                  <div className={css.sectionLabel}>Output</div>
+                  <div className={css.sectionLabel}>{t('details.output')}</div>
                   {/* Keyed by the selected call: the body owns per-call view
                       state (the terminal card's expand and copy), which React
                       would otherwise carry into the next selection because the
                       panel does not unmount between calls. */}
-                  <OutputBody key={callId} material={material} cwd={sessionCwd} />
+                  <OutputBody key={callId} material={material} cwd={sessionCwd} t={t} />
                 </section>
               </>
             )}
@@ -131,9 +131,10 @@ export function DetailsPanel({ useSession, useSessions, sessionId, useStore, clo
  * a running call with no terminal card yet, keeps the flattened text form.
  * @param props.material - the selected call's material from {@link materialFor}.
  * @param props.cwd - the session workspace root, resolving the terminal view's cwd.
+ * @param props.t - the panel's locale seat, passed down as a plain prop.
  * @returns the Output section's body element.
  */
-function OutputBody({ material, cwd }: { material: CallMaterial; cwd: string | undefined }) {
+function OutputBody({ material, cwd, t }: { material: CallMaterial; cwd: string | undefined; t: DetailsPanelProps['t'] }) {
   const terminal = terminalCardModel(material.block, cwd)
   if (terminal !== null) {
     // The contract renders the presenter's description above the card, and the
@@ -143,13 +144,13 @@ function OutputBody({ material, cwd }: { material: CallMaterial; cwd: string | u
         {terminal.description !== undefined && (
           <div className={css.terminalDescription}>{terminal.description}</div>
         )}
-        <TerminalBlock {...terminal.card} className={css.terminal} />
+        <TerminalBlock {...terminal.card} labels={terminalBlockLabels(t)} className={css.terminal} />
       </>
     )
   }
   // A settled call always carries the result node the flattened form needs;
   // the running shape has no result to flatten.
-  if (!('kind' in material.block)) return <div className={css.empty}>运行中…</div>
+  if (!('kind' in material.block)) return <div className={css.empty}>{t('details.running')}</div>
   const result = material.block
   return (
     <pre className={css.code} data-error={result.isError || undefined}>

packages/client/ui-conversation/src/client/skeleton/EmptyHero.tsx

@@ -10,8 +10,12 @@ import {
   FishLogo, IconChevronDownOutline14, IconFolderClose16, IconFolderOpen16,
 } from '@deepseek-ai/dsh-client-ui-primitives'
 import { workspaceTitleOf } from '@deepseek-ai/dsh-client-runtime/client'
+import type { ConversationSlotProps } from '../contract/slots.ts'
 import css from './HeroShell.module.css'
 
+/** The owner's locale seat type, passed to hero chrome as a plain prop. */
+type HeroTranslate = ConversationSlotProps['t']
+
 /**
  * Basename label for the workspace chip (the shared derivation);
  * separator-only paths echo the raw cwd.
@@ -34,18 +38,19 @@ export function workspaceLabel(cwd: string): string {
  * @param props.onClick - menu toggle.
  * @returns the chip button element.
  */
-export function WorkspaceChip({ buttonRef, label, menuOpen = false, onClick }: {
+export function WorkspaceChip({ buttonRef, label, menuOpen = false, onClick, t }: {
   buttonRef?: RefObject<HTMLButtonElement>
   label?: string | undefined
   menuOpen?: boolean
   onClick?: () => void
+  t: HeroTranslate
 }) {
   return (
     <button
       ref={buttonRef}
       type="button"
       className={css.workspace}
-      aria-label="Choose workspace"
+      aria-label={t('hero.chooseWorkspace')}
       aria-haspopup="menu"
       aria-expanded={menuOpen}
       onClick={onClick}
@@ -53,7 +58,7 @@ export function WorkspaceChip({ buttonRef, label, menuOpen = false, onClick }: {
       {label === undefined
         ? <IconFolderClose16 className={css.folder} size={16} />
         : <IconFolderOpen16 className={css.folder} size={16} />}
-      <span className={css.workspaceLabel}>{label ?? 'Choose workspace'}</span>
+      <span className={css.workspaceLabel}>{label ?? t('hero.chooseWorkspace')}</span>
       <IconChevronDownOutline14 className={css.chevron} size={12} />
     </button>
   )
@@ -95,6 +100,8 @@ export function HeroGlow({ className }: { className?: string | undefined }) {
 
 /** Hero chrome props. The workspace row rides the InputBar accessory hole, not here. */
 export interface HeroShellProps {
+  /** The owner's locale seat, passed down as a plain prop. */
+  t: HeroTranslate
   /** Overlay content after the stack (modals). */
   children?: ReactNode
 }
@@ -105,14 +112,14 @@ export interface HeroShellProps {
  * @param props - see {@link HeroShellProps}.
  * @returns the centered hero element tree.
  */
-export function HeroShell({ children }: HeroShellProps) {
+export function HeroShell({ t, children }: HeroShellProps) {
   return (
     <div className={css.root}>
       <div className={css.stack}>
         <div className={css.headline}>
           {/* figma 34:10412: fish 34×25 leading the headline, gap 10. */}
           <FishLogo size={34} className={css.fish} />
-          Let&apos;s start building
+          {t('hero.headline')}
         </div>
         <div className={css.body}>
           {/* The resident composer (ConversationRoot wrapActiveBody seat; the

packages/client/ui-conversation/src/client/skeleton/InputBar.module.css

@@ -209,7 +209,9 @@
 .mirror {
   visibility: hidden;
   pointer-events: none;
-  max-height: 336px;
+  /* 14-line cap, shared with the composer takeovers (declared on
+     ConversationRoot .composerSeat). */
+  max-height: var(--dsh-composer-text-max-height);
   overflow: hidden;
 }
 

packages/client/ui-conversation/src/client/skeleton/InputBar.tsx

@@ -15,6 +15,7 @@ import { IconPlusOutline16 } from '@deepseek-ai/dsh-client-ui-primitives'
 import type {} from '@deepseek-ai/dsh-plan-mode/client'
 // Type-only: the `goal` projection key merge (hint disambiguation).
 import type {} from '@deepseek-ai/dsh-goal/client'
+import type { Translate } from '@deepseek-ai/dsh-client-ui-slots'
 import type { ComposerBarProps } from '../contract/slots.ts'
 import { deriveDecorations } from '../input/decorations.ts'
 import type { DraftDecorations } from '../input/decorations.ts'
@@ -33,9 +34,9 @@ export interface InputBarError {
 export type InputBarProps = ComposerBarProps
 
 export function InputBar({
-  useSession, useInput, inputActions, keyboard, stop, command, translateHint, renderSlot, useNotices, useLexicon,
+  useSession, useInput, inputActions, keyboard, stop, command, t, renderSlot, useNotices, useLexicon,
   useProjection, sessionId, variant, disabled: inert = false, placeholder, accessory, overlay, leftItems, rightItems, footer,
-  onAdd, addLabel = 'Add attachment',
+  onAdd, addLabel,
 }: InputBarProps) {
   const input = useInput(s => s)
   const notice = useNotices(s => s)
@@ -256,7 +257,8 @@ export function InputBar({
     inputRef.current?.focus()
   }
 
-  const primaryLabel = running ? 'Stop generating' : 'Send message'
+  const addText = addLabel ?? t('input.addAttachment')
+  const primaryLabel = running ? t('input.stop') : t('input.send')
   const onPrimary = (): void => {
     if (inputActions === undefined || stop === undefined) return // absent machine: the button is disabled
     if (running) {
@@ -272,7 +274,7 @@ export function InputBar({
   // or while the command face is absent with the session).
   const accessSelect: ReactNode = command === undefined
     ? null
-    : <PermissionSelect value={permissions} locked={locked} command={command} />
+    : <PermissionSelect value={permissions} locked={locked} command={command} t={t} />
 
   // Mirror-layer decorations: a visible backdrop with transparent text. The
   // claim token highlights through behind the textarea glyphs; each U+FFFC
@@ -341,8 +343,10 @@ export function InputBar({
     if (deco.hint !== null) {
       // Claim tokens are shaped `/name ` (trailing space); trim to the bare name.
       const commandName = input?.claim?.token.slice(1).trim() ?? ''
-      const hintKey = commandName === 'goal' && hasGoal ? 'goal.active' : commandName
-      const translated = translateHint(hintKey)
+      const hintKey = `hint.${commandName === 'goal' && hasGoal ? 'goal.active' : commandName}`
+      // Dynamic lookup by claimed command name: unknown commands miss the
+      // dictionary and keep the machine's own hint, so the call is wide.
+      const translated = (t as Translate)(hintKey)
       const displayHint = translated !== hintKey ? translated : deco.hint
       backdrop.push(<span key="hint" className={css.hint} data-decoration="hint">{displayHint}</span>)
     }
@@ -376,8 +380,8 @@ export function InputBar({
             readOnly={machineBusy}
             data-phase={input?.phase ?? 'inert'}
             placeholder={placeholder ?? (disabled
-              ? 'Session unavailable'
-              : planActive ? translateHint('placeholder.plan') : translateHint('placeholder.default'))}
+              ? t('placeholder.unavailable')
+              : planActive ? t('placeholder.plan') : t('placeholder.default'))}
             rows={2}
             onChange={onChange}
             onKeyDown={onKeyDown}
@@ -395,8 +399,8 @@ export function InputBar({
             <button
               type="button"
               className={css.add}
-              aria-label={addLabel}
-              title={addLabel}
+              aria-label={addText}
+              title={addText}
               disabled={locked}
               onMouseDown={keepFocus}
               onClick={onAdd}

packages/client/ui-conversation/src/client/skeleton/PermissionSelect.tsx

@@ -2,6 +2,7 @@ import { useState } from 'react'
 import type { PermissionSelect as PermissionSelectValue } from '@deepseek-ai/dsh-permission/client'
 import { Menu } from '@deepseek-ai/dsh-client-ui-primitives'
 import type { MenuEntry } from '@deepseek-ai/dsh-client-ui-primitives'
+import type { ComposerBarProps } from '../contract/slots.ts'
 import css from './PermissionSelect.module.css'
 
 /**
@@ -19,9 +20,11 @@ export interface PermissionSelectProps {
   value: PermissionSelectValue | undefined
   locked: boolean
   command: (line: string) => Promise<boolean>
+  /** The owning bar's locale seat, passed down as a plain prop. */
+  t: ComposerBarProps['t']
 }
 
-export function PermissionSelect({ value, locked, command }: PermissionSelectProps) {
+export function PermissionSelect({ value, locked, command, t }: PermissionSelectProps) {
   const [pick, setPick] = useState<string | null>(null)
   const [open, setOpen] = useState(false)
 
@@ -56,7 +59,7 @@ export function PermissionSelect({ value, locked, command }: PermissionSelectPro
         <button
           type="button"
           className={css.trigger}
-          aria-label={`Access mode, current: ${displayName(current?.name ?? currentValue)}`}
+          aria-label={t('input.accessMode', { name: displayName(current?.name ?? currentValue) })}
           title={current?.description}
           disabled={locked || busy}
           onClick={() => { setOpen(!open) }}

packages/client/ui-conversation/src/client/skeleton/TodoPanel.module.css

@@ -1,9 +1,8 @@
-/* Todo strip above the composer (figma 772:51905 / 772:52972 / 772:53419):
-   tip surface, 14px radius, status icons + secondary item labels. Column is
-   calc(100% - 88px) / max 752 (GoalBar's column), centered; the composer
-   stack owns the gap. */
+/* Todo strip in the composer context stack (Figma 9:959): tip surface,
+   14px radius, status icons + secondary item labels. */
 
 .root {
+  box-sizing: border-box;
   flex: none;
   overflow: hidden;
   margin: 0 auto;
@@ -21,13 +20,11 @@
   --dsh-scrollbar-thumb-hover: var(--dsw-alias-scrollbar-hover-l2);
 }
 
-/* Compact scale (GoalBar reference): collapsed header totals the goal
-   strip's 38px (8+8 pad + 20 line + 2 border). */
 .body {
   display: flex;
   flex-direction: column;
   gap: 8px;
-  padding: 8px 14px;
+  padding: 9px 15px;
 }
 
 .header {
@@ -44,8 +41,8 @@
 
 .title {
   flex: none;
-  font-size: 13px;
-  line-height: 20px;
+  font-size: 14px;
+  line-height: 24px;
   font-weight: 500;
   color: var(--dsw-alias-label-primary);
 }

packages/client/ui-conversation/src/client/skeleton/TodoPanel.tsx

@@ -7,18 +7,21 @@
 
 import { useId, useState } from 'react'
 import type { Context } from 'cordis'
-import type { PropsRuntime } from '@deepseek-ai/dsh-client-ui-slots'
+import type { PropsLocale, PropsRuntime } from '@deepseek-ai/dsh-client-ui-slots'
 // The domain's client-namespace pure-type outlet: one import edge delivers
 // the `todos` projection-key merge (single source, no consumer-side restated
 // declare) and the payload type. Type-only by construction — the outlet is
 // free of host value imports, so no host Context merge enters this program.
 import type { TodoItem } from '@deepseek-ai/dsh-tool-todo/client'
 import { IconChevronDownOutline14, IconChevronUpOutline14 } from '@deepseek-ai/dsh-client-ui-primitives'
+import { NS } from '../locales.ts'
 import css from './TodoPanel.module.css'
 
 export interface TodoPanelProps {
   /** The session's current plan (empty renders nothing) — selected by the dock adapter. */
   todos: readonly TodoItem[]
+  /** The dock entry's locale seat, passed down as a plain prop. */
+  t: TodoDockProps['t']
 }
 
 /** Local exhaustiveness helper — client packages do not depend on `dsh-llm`. */
@@ -76,18 +79,18 @@ function StatusGlyph({ status }: { status: TodoItem['status'] }) {
 }
 
 /** Header summary: "<done>/<total> tasks · <n> in progress". */
-function progressLabel(todos: readonly TodoItem[]): string {
-  const done = todos.filter(t => t.status === 'completed').length
-  const active = todos.filter(t => t.status === 'in_progress').length
-  return `${done}/${todos.length} tasks · ${active} in progress`
+function progressLabel(todos: readonly TodoItem[], t: TodoPanelProps['t']): string {
+  const done = todos.filter(item => item.status === 'completed').length
+  const active = todos.filter(item => item.status === 'in_progress').length
+  return t('todo.progress', { done, total: todos.length, active })
 }
 
-export function TodoPanel({ todos }: TodoPanelProps) {
+export function TodoPanel({ todos, t }: TodoPanelProps) {
   const [collapsed, setCollapsed] = useState(true)
   if (todos.length === 0) return null
 
   return (
-    <section className={css.root} data-testid="todo-panel" aria-label="To-dos">
+    <section className={css.root} data-testid="todo-panel" aria-label={t('todo.title')}>
       <div className={css.body}>
         <button
           type="button"
@@ -95,8 +98,8 @@ export function TodoPanel({ todos }: TodoPanelProps) {
           aria-expanded={!collapsed}
           onClick={() => { setCollapsed(v => !v) }}
         >
-          <span className={css.title}>To-dos</span>
-          <span className={css.progress}>{progressLabel(todos)}</span>
+          <span className={css.title}>{t('todo.title')}</span>
+          <span className={css.progress}>{progressLabel(todos, t)}</span>
           <span className={css.chevron} aria-hidden>
             {collapsed ? <IconChevronUpOutline14 /> : <IconChevronDownOutline14 />}
           </span>
@@ -116,13 +119,13 @@ export function TodoPanel({ todos }: TodoPanelProps) {
   )
 }
 
-/** Full props of a dock entry: InputZone owner share + session standard kit + global seat. */
-export type TodoDockProps = PropsRuntime<'conversation.input.dock'>
+/** Full props of a dock entry: InputZone owner share + session standard kit + global seat + the locale seat. */
+export type TodoDockProps = PropsRuntime<'conversation.input.dock'> & PropsLocale<'conversation'>
 
 /** Dock adapter: reads the host-computed 'todos' projection (whole list; absent or null renders nothing). */
-export function TodoDock({ useProjection }: TodoDockProps) {
+export function TodoDock({ useProjection, t }: TodoDockProps) {
   const todos = useProjection('todos')
-  return <TodoPanel todos={todos ?? []} />
+  return <TodoPanel todos={todos ?? []} t={t} />
 }
 
 /**
@@ -135,10 +138,10 @@ export const todoDockEntry = {
   name: 'conversation-todo-dock',
   inject: ['slots', 'conversation'],
   /**
-   * Register the plan strip into the input dock (list entry, above the queue rows).
+   * Register the plan strip between the goal and queue entries (order 10).
    * @param ctx - registrant context (disposal rides ctx.effect inside slots.register).
    */
   apply(ctx: Context): void {
-    ctx.slots.register({ name: 'conversation.input.dock', id: 'todo', order: -1 }, TodoDock)
+    ctx.slots.register({ name: 'conversation.input.dock', id: 'todo', order: 10, locale: NS }, TodoDock)
   },
 }

packages/client/ui-conversation/src/client/toolviews/ask-question-row.tsx

@@ -8,9 +8,11 @@
 
 import { IconQuestionOutline14 } from '@deepseek-ai/dsh-client-ui-primitives'
 import type { Context } from 'cordis'
+import type { PropsLocale } from '@deepseek-ai/dsh-client-ui-slots'
 import type { ToolRowProps } from '../contract/slots.ts'
 import { toolRowModel } from '../contract/tool-call-model.ts'
 import { ToolRow } from '../chat/ToolRow.tsx'
+import { NS } from '../locales.ts'
 
 /** One parsed answer entry, shape-checked (result JSON crosses the wire). */
 interface AnswerEntry { selected?: unknown; custom?: unknown }
@@ -19,9 +21,9 @@ function isAnswer(value: unknown): value is AnswerEntry {
   return typeof value === 'object' && value !== null
 }
 
-/** `${answered}/${total} answered` off the result JSON (a skipped question has
+/** Answered-count summary off the result JSON (a skipped question has
  *  empty `selected` and no `custom`); null on unexpected shape (generic fallback). */
-function answeredSummary(text: string): string | null {
+function answeredSummary(text: string, t: AskQuestionRowProps['t']): string | null {
   let parsed: unknown
   try {
     parsed = JSON.parse(text)
@@ -34,11 +36,14 @@ function answeredSummary(text: string): string | null {
   const answered = answers.filter(a =>
     (Array.isArray(a.selected) && a.selected.length > 0)
     || (typeof a.custom === 'string' && a.custom !== '')).length
-  return `${answered}/${answers.length} answered`
+  return t('ask.answered', { answered, total: answers.length })
 }
 
+/** Full row props: the toolview runtime share plus the standard locale seat. */
+type AskQuestionRowProps = ToolRowProps & PropsLocale<'conversation'>
+
 /** One-line question-interaction row (leading toggle expands the raw args). */
-export function AskQuestionRow({ toolName, block }: ToolRowProps) {
+export function AskQuestionRow({ toolName, block, t }: AskQuestionRowProps) {
   const model = toolRowModel(toolName, block)
   // Composer verdicts settle the call as specific UserInteractionErrors
   // (apiproxy ask_user_question handler): 'ASK_CANCELLED' is the user's own
@@ -50,22 +55,23 @@ export function AskQuestionRow({ toolName, block }: ToolRowProps) {
   let summary = model.summary
   let state = model.state
   if (code === 'ASK_CANCELLED') {
-    summary = 'cancelled'
+    summary = t('ask.cancelled')
   } else if (code === 'ASK_ABORTED') {
-    summary = 'interrupted'
+    summary = t('ask.interrupted')
     state = 'stopped'
   } else if (model.state === 'running') {
-    summary = 'waiting'
+    summary = t('ask.waiting')
   } else if ('kind' in block && model.state === 'ok') {
     const text = block.content.filter(b => b.type === 'text').map(b => b.text).join('')
-    summary = answeredSummary(text) ?? model.summary
+    summary = answeredSummary(text, t) ?? model.summary
   }
   return (
     <ToolRow
+      t={t}
       variant={model.variant}
       toolName={toolName}
       icon={<IconQuestionOutline14 />}
-      title="Ask question"
+      title={t('ask.rowTitle')}
       summary={summary}
       body={model.body}
       state={state}
@@ -87,6 +93,6 @@ export const askQuestionToolview = {
    * @param ctx - registrant context (disposal rides ctx.effect inside slots.register).
    */
   apply(ctx: Context): void {
-    ctx.slots.register({ name: 'conversation.chat.toolview', key: 'ask_user_question' }, AskQuestionRow)
+    ctx.slots.register({ name: 'conversation.chat.toolview', key: 'ask_user_question', locale: NS }, AskQuestionRow)
   },
 }

packages/client/ui-conversation/src/client/toolviews/bash-sample.tsx

@@ -15,11 +15,16 @@
 
 import type { Context } from 'cordis'
 import { IconApiOutline14, StateDot, TerminalBlock } from '@deepseek-ai/dsh-client-ui-primitives'
+import type { PropsLocale } from '@deepseek-ai/dsh-client-ui-slots'
 import type { ToolRowProps } from '../contract/slots.ts'
-import { CHAT_TERMINAL_MAX_LINES, terminalCardModel } from '../contract/terminal-card-model.ts'
+import { CHAT_TERMINAL_MAX_LINES, terminalBlockLabels, terminalCardModel } from '../contract/terminal-card-model.ts'
 import { toolRowModel, type ToolRowState } from '../contract/tool-call-model.ts'
+import { NS } from '../locales.ts'
 import css from './bash-sample.module.css'
 
+/** Bash row props: the toolview runtime share plus the standard locale seat. */
+type BashRowProps = ToolRowProps & PropsLocale<'conversation'>
+
 function leadingFor(state: ToolRowState) {
   switch (state) {
     case 'error': return <StateDot state="error" />
@@ -30,11 +35,11 @@ function leadingFor(state: ToolRowState) {
 }
 
 /** Visually hidden status — StateDot is aria-hidden; AT needs a text label. */
-function stateStatus(state: ToolRowState): string | null {
+function stateStatus(state: ToolRowState, t: BashRowProps['t']): string | null {
   switch (state) {
-    case 'running': return '运行中'
-    case 'error': return '失败'
-    case 'stopped': return '已停止'
+    case 'running': return t('bash.running')
+    case 'error': return t('bash.failed')
+    case 'stopped': return t('bash.stopped')
     default: return null
   }
 }
@@ -45,14 +50,14 @@ function stateStatus(state: ToolRowState): string | null {
  * details-panel control (tool rows stopped being one), so the card's copy and
  * expand controls are the row's only interactions.
  */
-export function BashRow({ toolName, block, sessionId, useSessions }: ToolRowProps) {
+export function BashRow({ toolName, block, sessionId, useSessions, t }: BashRowProps) {
   const model = toolRowModel(toolName, block)
   // Session workspace root: the terminal view's cwd resolves against it (an
   // omitted workdir IS the workspace), which the pure presenter cannot do.
   const cwd = useSessions(list => list.byId[sessionId]?.cwd)
   const terminal = terminalCardModel(block, cwd)
   const isChild = useSessions(list => list.byId[sessionId]?.parentId !== undefined)
-  const status = stateStatus(model.state)
+  const status = stateStatus(model.state, t)
   return (
     <div className={css.card}>
       <div
@@ -71,7 +76,12 @@ export function BashRow({ toolName, block, sessionId, useSessions }: ToolRowProp
         <span className={css.summary}>{terminal?.description ?? model.summary}</span>
       </div>
       {terminal !== null && (
-        <TerminalBlock {...terminal.card} maxLines={CHAT_TERMINAL_MAX_LINES} className={css.terminal} />
+        <TerminalBlock
+          {...terminal.card}
+          maxLines={CHAT_TERMINAL_MAX_LINES}
+          labels={terminalBlockLabels(t)}
+          className={css.terminal}
+        />
       )}
     </div>
   )
@@ -91,6 +101,6 @@ export const bashToolviewSample = {
    * @param ctx - registrant context (disposal rides ctx.effect inside slots.register).
    */
   apply(ctx: Context): void {
-    ctx.slots.register({ name: 'conversation.chat.toolview', key: 'bash' }, BashRow)
+    ctx.slots.register({ name: 'conversation.chat.toolview', key: 'bash', locale: NS }, BashRow)
   },
 }

packages/client/ui-conversation/src/client/toolviews/todo-row.tsx

@@ -8,9 +8,14 @@
 
 import { IconChecklistOutline14 } from '@deepseek-ai/dsh-client-ui-primitives'
 import type { Context } from 'cordis'
+import type { PropsLocale } from '@deepseek-ai/dsh-client-ui-slots'
 import type { ToolRowProps } from '../contract/slots.ts'
 import { toolRowModel } from '../contract/tool-call-model.ts'
 import { ToolRow } from '../chat/ToolRow.tsx'
+import { NS } from '../locales.ts'
+
+/** Todo row props: the toolview runtime share plus the standard locale seat. */
+type TodoRowProps = ToolRowProps & PropsLocale<'conversation'>
 
 /** One parsed args item, shape-checked (model JSON: any field may be missing or mistyped). */
 interface TodoWriteItem { content?: unknown; status?: unknown }
@@ -19,7 +24,7 @@ function isItem(value: unknown): value is TodoWriteItem {
   return typeof value === 'object' && value !== null
 }
 
-function summarize(argsRaw: string): string | null {
+function summarize(argsRaw: string, t: TodoRowProps['t']): string | null {
   let parsed: unknown
   try {
     parsed = JSON.parse(argsRaw)
@@ -32,9 +37,9 @@ function summarize(argsRaw: string): string | null {
   if (typeof parsed !== 'object' || parsed === null) return null
   const todos = (parsed as { todos?: unknown }).todos
   if (!Array.isArray(todos) || !todos.every(isItem)) return null
-  const done = todos.filter(t => t.status === 'completed').length
-  const active = todos.find(t => t.status === 'in_progress')
-  const head = `${done}/${todos.length} 已完成`
+  const done = todos.filter(item => item.status === 'completed').length
+  const active = todos.find(item => item.status === 'in_progress')
+  const head = t('todo.completed', { done, total: todos.length })
   return typeof active?.content === 'string' && active.content !== ''
     ? `${head} · ${active.content}`
     : head
@@ -43,16 +48,17 @@ function summarize(argsRaw: string): string | null {
 /** One-line plan update row (leading toggle expands the raw args). Non-ok
  *  execution states keep the shared row's dot semantics — a cancelled call
  *  wrote no todo/write, so it must not read as a completed update. */
-export function TodoRow({ toolName, block }: ToolRowProps) {
+export function TodoRow({ toolName, block, t }: TodoRowProps) {
   const model = toolRowModel(toolName, block)
   const argsRaw = ('kind' in block ? block.call?.argsRaw : block.argsRaw) ?? ''
-  const summary = summarize(argsRaw) ?? model.summary
+  const summary = summarize(argsRaw, t) ?? model.summary
   return (
     <ToolRow
+      t={t}
       variant={model.variant}
       toolName={toolName}
       icon={<IconChecklistOutline14 />}
-      title="更新任务清单"
+      title={t('todo.rowTitle')}
       summary={summary}
       body={model.body}
       state={model.state}
@@ -73,6 +79,6 @@ export const todoToolview = {
    * @param ctx - registrant context (disposal rides ctx.effect inside slots.register).
    */
   apply(ctx: Context): void {
-    ctx.slots.register({ name: 'conversation.chat.toolview', key: 'todo_write' }, TodoRow)
+    ctx.slots.register({ name: 'conversation.chat.toolview', key: 'todo_write', locale: NS }, TodoRow)
   },
 }

packages/client/ui-conversation/tests/apply-inject.spec.tsx

@@ -50,7 +50,9 @@ async function bench() {
   })
   const layoutFake = { openDetails: vi.fn(), closeDetails: vi.fn() }
   runtime.provide('layout', layoutFake)
-  runtime.provide('locale', new LocaleService(runtime.ctx))
+  const locale = new LocaleService(runtime.ctx)
+  runtime.provide('locale', locale)
+  runtime.slots.installLocale(locale)
 
   // The AppFrame role: the conversation-package slots must be declared by a
   // live entry before apply can contribute into them.
@@ -122,6 +124,13 @@ describe('conversation slot inject surface', () => {
     const chatView = b.chatViewSurface(ROOT)
     chatView.injected.loadOlder()
     expect(b.sessionFake.loadOlder).toHaveBeenCalledTimes(1)
+    chatView.injected.forkAt(17)
+    await vi.waitFor(() => {
+      expect(b.runtime.sessions.calls).toContainEqual({ method: 'open', args: [ROOT] })
+    })
+    expect(b.runtime.sessions.calls).toContainEqual({
+      method: 'fork', args: [{ sessionId: ROOT, atSeq: 17, increaseTitle: true }],
+    })
     await b.runtime.dispose()
   })
 
@@ -303,7 +312,7 @@ describe('conversation slot inject surface', () => {
     // Label falls back to the id when a rider declares none.
     const off2 = b.slots.register(
       { name: 'conversation.view', id: 'bare', order: 6 } as never, (() => null) as never)
-    expect(injected.views.list().map(v => v.label)).toEqual(['Chat', 'X', 'bare'])
+    expect(injected.views.list().map(v => v.label)).toEqual(['对话', 'X', 'bare'])
     off()
     off2()
     unsub()

packages/client/ui-conversation/tests/ask-question-row.spec.tsx

@@ -10,9 +10,11 @@
 import { cleanup, fireEvent, render, screen } from '@testing-library/react'
 import { afterEach, describe, expect, it, vi } from 'vitest'
 import type { ToolResultNode } from '@deepseek-ai/dsh-client-runtime/client'
-import type { ToolRowProps } from '@deepseek-ai/dsh-client-ui-conversation/client'
+import { makeTranslate } from '@deepseek-ai/dsh-client-test-runtime'
+import { zh as commonZh } from '@deepseek-ai/dsh-client-locale/src/locales/zh.ts'
 // Export discipline: packages/client/AGENTS.md.
 import { AskQuestionRow, askQuestionToolview } from '../src/client/toolviews/ask-question-row.tsx'
+import { zh } from '../src/client/locales.ts'
 
 afterEach(cleanup)
 
@@ -28,13 +30,16 @@ const resultNode = (argsRaw: string, resultText: string | null, over?: Partial<T
 const runningCall = (argsRaw: string) =>
   ({ callId: 'c1', name: 'ask_user_question', argsRaw, turn: 1, step: 1, time: 1_000, callView: null })
 
-function rowProps(block: unknown): ToolRowProps {
+// Standard locale seat stub mirroring the real ns → common → key chain.
+const t = makeTranslate(zh, commonZh)
+
+function rowProps(block: unknown): Parameters<typeof AskQuestionRow>[0] {
   return {
-    callId: 'c1', toolName: 'ask_user_question', block,
+    callId: 'c1', toolName: 'ask_user_question', block, t,
     openFile: vi.fn(),
     sessionId: 's1',
     useSessions: () => undefined,
-  } as unknown as ToolRowProps
+  } as unknown as Parameters<typeof AskQuestionRow>[0]
 }
 
 const answers = (entries: unknown[]): string => JSON.stringify({ answers: entries })
@@ -42,8 +47,8 @@ const answers = (entries: unknown[]): string => JSON.stringify({ answers: entrie
 describe('AskQuestionRow', () => {
   it('running call reads waiting (args-independent: the composer takeover shows the questions)', () => {
     const view = render(<AskQuestionRow {...rowProps(runningCall(ARGS))} />)
-    expect(screen.getByText('Ask question')).toBeTruthy()
-    expect(screen.getByText('waiting')).toBeTruthy()
+    expect(screen.getByText('提问')).toBeTruthy()
+    expect(screen.getByText('等待回答')).toBeTruthy()
     expect(view.container.querySelector('[data-state="running"]')).not.toBeNull()
   })
 
@@ -53,7 +58,7 @@ describe('AskQuestionRow', () => {
       { id: 'b', selected: [], custom: 'freeform' },
       { id: 'c', selected: ['y', 'z'], custom: '' },
     ])))} />)
-    expect(screen.getByText('3/3 answered')).toBeTruthy()
+    expect(screen.getByText('3/3 已回答')).toBeTruthy()
   })
 
   it('skipped questions (no selection, no custom) stay out of the answered count', () => {
@@ -62,7 +67,7 @@ describe('AskQuestionRow', () => {
       { id: 'b', selected: [], custom: '' },
       { id: 'c' },
     ])))} />)
-    expect(screen.getByText('1/3 answered')).toBeTruthy()
+    expect(screen.getByText('1/3 已回答')).toBeTruthy()
     expect(view.container.querySelector('[data-state="ok"]')).not.toBeNull()
   })
 
@@ -82,7 +87,7 @@ describe('AskQuestionRow', () => {
     // ASK_CANCELLED: the apiproxy ask_user_question handler's cancel error.
     const view = render(<AskQuestionRow {...rowProps(resultNode(ARGS, null,
       { isError: true, error: { name: 'UserInteractionError', code: 'ASK_CANCELLED' } }))} />)
-    expect(screen.getByText('cancelled')).toBeTruthy()
+    expect(screen.getByText('已取消')).toBeTruthy()
     expect(view.container.querySelector('[data-state="error"]')).not.toBeNull()
   })
 
@@ -90,7 +95,7 @@ describe('AskQuestionRow', () => {
     // ASK_ABORTED: the apiproxy ask handler's turn-abort settlement.
     const view = render(<AskQuestionRow {...rowProps(resultNode(ARGS, null,
       { isError: true, error: { name: 'UserInteractionError', code: 'ASK_ABORTED' } }))} />)
-    expect(screen.getByText('interrupted')).toBeTruthy()
+    expect(screen.getByText('已中断')).toBeTruthy()
     expect(view.container.querySelector('[data-state="stopped"]')).not.toBeNull()
   })
 
@@ -98,7 +103,7 @@ describe('AskQuestionRow', () => {
     const view = render(<AskQuestionRow {...rowProps(resultNode(ARGS, null,
       { isError: true, error: { name: 'Interrupted', code: 'interrupted' } }))} />)
     expect(view.container.querySelector('[data-state="stopped"]')).not.toBeNull()
-    expect(screen.queryByText('cancelled')).toBeNull()
+    expect(screen.queryByText('已取消')).toBeNull()
     expect(screen.getByText(`ask_user_question · ${ARGS}`)).toBeTruthy()
   })
 
@@ -124,6 +129,9 @@ describe('AskQuestionRow', () => {
     expect(askQuestionToolview.inject).toEqual(['slots', 'conversation'])
     const register = vi.fn()
     askQuestionToolview.apply({ slots: { register } } as never)
-    expect(register).toHaveBeenCalledWith({ name: 'conversation.chat.toolview', key: 'ask_user_question' }, AskQuestionRow)
+    expect(register).toHaveBeenCalledWith(
+      { name: 'conversation.chat.toolview', key: 'ask_user_question', locale: 'conversation' },
+      AskQuestionRow,
+    )
   })
 })

packages/client/ui-conversation/tests/assembly-surfaces.spec.tsx

@@ -82,7 +82,9 @@ const LAYOUT_CHILDREN = {
 async function bench(nodes: ToolResultNode[], opts?: { blank?: boolean }) {
   const runtime = await SlotTestRuntime.create()
   runtime.provide('layout', { openDetails: vi.fn(), closeDetails: vi.fn() })
-  runtime.provide('locale', new LocaleService(runtime.ctx))
+  const locale = new LocaleService(runtime.ctx)
+  runtime.provide('locale', locale)
+  runtime.slots.installLocale(locale)
   await runtime.sessions.add({
     id: SID,
     summary: { title: 'S', displayTitle: 'S', cwd: '/proj' },
@@ -116,7 +118,7 @@ describe('todo_write assembly (product registrations, no outlet twins)', () => {
     // (default-collapsed: the header summary shows; rows appear on expand).
     const panel = view.container.querySelector('[data-testid="todo-panel"]')
     expect(panel).not.toBeNull()
-    expect(panel!.textContent).toContain('1/3 tasks · 1 in progress')
+    expect(panel!.textContent).toContain('1/3 项任务 · 1 项进行中')
     fireEvent.click(panel!.querySelector('button')!)
     expect([...panel!.querySelectorAll('li')].map(li => li.getAttribute('data-status')))
       .toEqual(['completed', 'in_progress', 'pending'])
@@ -162,7 +164,9 @@ describe('resident composer', () => {
   it('renders the locked view state while no session exists at all', async () => {
     const runtime = await SlotTestRuntime.create()
     runtime.provide('layout', { openDetails: vi.fn(), closeDetails: vi.fn() })
-    runtime.provide('locale', new LocaleService(runtime.ctx))
+    const locale = new LocaleService(runtime.ctx)
+    runtime.provide('locale', locale)
+    runtime.slots.installLocale(locale)
     await runtime.root.declare(LAYOUT_CHILDREN, AppRoot)
     await runtime.mount({ inject: [...inject], apply })
     const view = runtime.renderRoot()
@@ -171,7 +175,7 @@ describe('resident composer', () => {
     const textarea = view.container.querySelector('textarea')
     expect(textarea).not.toBeNull()
     expect(textarea!.disabled).toBe(true)
-    expect(view.getByRole('button', { name: 'Choose workspace' })).toBeTruthy()
+    expect(view.getByRole('button', { name: '选择工作区' })).toBeTruthy()
     await runtime.dispose()
   })
 
@@ -204,7 +208,9 @@ describe('prompt rejection through the assembled composer', () => {
   it('renders the promptError alert strip and keeps the draft in the machine', async () => {
     const runtime = await SlotTestRuntime.create()
     runtime.provide('layout', { openDetails: vi.fn(), closeDetails: vi.fn() })
-    runtime.provide('locale', new LocaleService(runtime.ctx))
+    const locale = new LocaleService(runtime.ctx)
+    runtime.provide('locale', locale)
+    runtime.slots.installLocale(locale)
     const prompt = vi.fn<ISession['prompt']>(async () => ({
       ok: false, error: { code: 'agent-busy', message: 'prompt rejected before acceptance', details: { reason: 'busy' } },
     }))
@@ -245,7 +251,7 @@ describe('title projection across assembled surfaces', () => {
     const runtime = await bench([])
     const view = runtime.renderRoot()
     // The strict session header breadcrumb reads useSessions ancestry.
-    const crumb = within(view.container.querySelector('[aria-label="Session hierarchy"]') as HTMLElement)
+    const crumb = within(view.container.querySelector('[aria-label="会话层级"]') as HTMLElement)
     expect(crumb.getByText('S')).toBeTruthy()
 
     await runtime.sessions.updateSummary(SID, { displayTitle: '修订标题', title: '修订标题' })

packages/client/ui-conversation/tests/chat-apply.spec.tsx

@@ -10,6 +10,7 @@
 
 import { describe, expect, it, vi } from 'vitest'
 import { SlotTestRuntime } from '@deepseek-ai/dsh-client-test-runtime'
+import { resolveSlotLabel } from '@deepseek-ai/dsh-client-ui-slots'
 import { LocaleService } from '@deepseek-ai/dsh-client-locale/client'
 import type { SessionId } from '@deepseek-ai/dsh-client-runtime/client'
 import { apply, inject } from '@deepseek-ai/dsh-client-ui-conversation/client'
@@ -23,7 +24,9 @@ async function bench() {
   await runtime.sessions.add(
     { id: CHILD, summary: { title: 'C', displayTitle: 'C', parentId: ROOT } }, { current: false })
   runtime.provide('layout', { openDetails: vi.fn(), closeDetails: vi.fn() })
-  runtime.provide('locale', new LocaleService(runtime.ctx))
+  const locale = new LocaleService(runtime.ctx)
+  runtime.provide('locale', locale)
+  runtime.slots.installLocale(locale)
 
   // Declared by ui-layout's root entry in production; the test root declares
   // them here so the contributions land.
@@ -52,7 +55,8 @@ describe('apply wiring', () => {
     const b = await bench()
     const entries = b.slots.entries('conversation.view')
     expect(entries.map(e => e.options.id)).toEqual(['chat'])
-    expect(entries[0]?.options.label).toBe('Chat')
+    // Label is a locale thunk resolving through the zh dictionary.
+    expect(resolveSlotLabel(entries[0]?.options.label)).toBe('对话')
     expect(entries[0]?.options.order).toBe(0)
     // Declaring is claiming: the chat entry's registration put the hole on
     // the ledger with the contract's kind/scope.

packages/client/ui-conversation/tests/chat-branch-tails.spec.tsx

@@ -8,15 +8,21 @@
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import { act, cleanup, fireEvent, render, screen } from '@testing-library/react'
 import { bindSnapshotSelector } from '@deepseek-ai/dsh-client-web-react'
+import { makeTranslate } from '@deepseek-ai/dsh-client-test-runtime'
+import { zh as commonZh } from '@deepseek-ai/dsh-client-locale/src/locales/zh.ts'
 import {
   formatMessageClock, msUntilNextLocalMidnight, startOfLocalDay,
 } from '../src/client/chat/message-chrome.ts'
-import { MessageItem } from '../src/client/chat/MessageItem.tsx'
+import { MessageItem, type MessageItemProps } from '../src/client/chat/MessageItem.tsx'
 import { AssistantMarkdown } from '../src/client/chat/AssistantMarkdown.tsx'
 import { StatsLine, type StatsLineProps } from '../src/client/chat/StatsLine.tsx'
+import { zh } from '../src/client/locales.ts'
 
 afterEach(cleanup)
 
+// Mirrors the real lookup chain (conversation namespace, then common).
+const t: MessageItemProps['t'] = makeTranslate(zh, commonZh)
+
 describe('MessageItem arms', () => {
   it('user bubbles expose clock / copy / branch / edit; copy writes the text', () => {
     const writeText = vi.fn().mockResolvedValue(undefined)
@@ -28,7 +34,7 @@ describe('MessageItem arms', () => {
     const now = new Date()
     const time = new Date(now.getFullYear(), now.getMonth(), now.getDate(), 14, 24).getTime()
     render(
-      <MessageItem node={{
+      <MessageItem t={t} node={{
         kind: 'user', seq: 1, time,
         content: [{ type: 'text', text: 'hello bubble' }] as never,
         source: null,
@@ -54,7 +60,7 @@ describe('MessageItem arms', () => {
       value: exec,
     })
     render(
-      <MessageItem node={{
+      <MessageItem t={t} node={{
         kind: 'user', seq: 1, time: 1_000,
         content: [{ type: 'text', text: 'fallback body' }] as never,
         source: null,
@@ -77,7 +83,7 @@ describe('MessageItem arms', () => {
       },
     })
     render(
-      <MessageItem node={{
+      <MessageItem t={t} node={{
         kind: 'user', seq: 1, time: 1_000,
         content: [{ type: 'text', text: 'quiet' }] as never,
         source: null,
@@ -95,7 +101,7 @@ describe('MessageItem arms', () => {
 
   it('steering bubbles carry the interjection badge and non-text rest blocks, without user actions', () => {
     const view = render(
-      <MessageItem node={{
+      <MessageItem t={t} node={{
         kind: 'steering', seq: 2, turn: 1, source: null,
         content: [{ type: 'text', text: 'steer!' }, { type: 'image', data: 'x' }] as never,
       } as never}
@@ -107,13 +113,50 @@ describe('MessageItem arms', () => {
     expect(view.queryByRole('button', { name: '复制' })).toBeNull()
   })
 
-  it('context and unknown nodes render their JSON rows', () => {
+  it('context uses the Tool calls disclosure chrome and keeps its JSON collapsed by default', () => {
     const ctxView = render(
-      <MessageItem node={{ kind: 'context', seq: 3, content: [], source: null } as never} />,
+      <MessageItem t={t} node={{
+        kind: 'context',
+        seq: 3,
+        content: [{ type: 'text', text: 'x\n"y":,[{}]' }],
+        source: { kind: 'plugin', plugin: 'fixture', empty: {}, list: [] },
+      } as never}
+      />,
     )
-    expect(ctxView.getByText(/上下文注入/)).toBeTruthy()
+    const disclosure = ctxView.getByRole('button', { name: '上下文注入' })
+    expect(disclosure.getAttribute('aria-expanded')).toBe('false')
+    expect(ctxView.container.querySelector('[data-context-injection-body]')).toBeNull()
+    expect(ctxView.container.querySelector('svg')).not.toBeNull()
+
+    fireEvent.click(disclosure)
+    expect(disclosure.getAttribute('aria-expanded')).toBe('true')
+    expect(ctxView.container.querySelector('[data-context-injection-body]')?.textContent).toBe(
+      '{ "content": [ { "type": "text", "text": "x\\n\\"y\\":,[{}]" } ], '
+      + '"source": { "kind": "plugin", "plugin": "fixture", "empty": {}, "list": [] } }',
+    )
+
+    fireEvent.keyDown(disclosure, { key: ' ' })
+    expect(disclosure.getAttribute('aria-expanded')).toBe('false')
+  })
+
+  it('context preserves the bounded JSON truncation contract', () => {
+    const view = render(
+      <MessageItem t={t} node={{
+        kind: 'context',
+        seq: 3,
+        content: [{ type: 'text', text: 'x'.repeat(21_000) }],
+        source: null,
+      } as never}
+      />,
+    )
+    fireEvent.click(view.getByRole('button', { name: '上下文注入' }))
+    expect(view.container.querySelector('[data-context-injection-body]')?.textContent)
+      .toMatch(/… 已截断，共 \d+ 字符$/)
+  })
+
+  it('unknown nodes retain the generic JSON row', () => {
     const unknownView = render(
-      <MessageItem node={{ kind: 'unknown', seq: 4, type: 'surface/next', data: { x: 1 } } as never} />,
+      <MessageItem t={t} node={{ kind: 'unknown', seq: 4, type: 'surface/next', data: { x: 1 } } as never} />,
     )
     expect(unknownView.getByText(/未知 surface 事件：surface\/next/)).toBeTruthy()
   })
@@ -123,15 +166,15 @@ describe('formatMessageClock', () => {
   const now = new Date(2026, 6, 29, 10, 0).getTime()
 
   it('keeps HH:mm on the same calendar day', () => {
-    expect(formatMessageClock(new Date(2026, 6, 29, 14, 24).getTime(), now)).toBe('14:24')
+    expect(formatMessageClock(new Date(2026, 6, 29, 14, 24).getTime(), t, now)).toBe('14:24')
   })
 
   it('prefixes month and day across days in the same year', () => {
-    expect(formatMessageClock(new Date(2026, 0, 1, 14, 24).getTime(), now)).toBe('1月1日 14:24')
+    expect(formatMessageClock(new Date(2026, 0, 1, 14, 24).getTime(), t, now)).toBe('1月1日 14:24')
   })
 
   it('prefixes year, month, and day across years', () => {
-    expect(formatMessageClock(new Date(2025, 11, 31, 9, 5).getTime(), now)).toBe('2025年12月31日 09:05')
+    expect(formatMessageClock(new Date(2025, 11, 31, 9, 5).getTime(), t, now)).toBe('2025年12月31日 09:05')
   })
 
   it('arms the next local midnight from an in-day instant', () => {
@@ -154,7 +197,7 @@ describe('useCalendarDay boundary refresh', () => {
     vi.setSystemTime(dayStart)
     const time = new Date(2026, 6, 29, 14, 24).getTime()
     render(
-      <MessageItem node={{
+      <MessageItem t={t} node={{
         kind: 'user', seq: 1, time,
         content: [{ type: 'text', text: 'night bubble' }] as never,
         source: null,
@@ -172,7 +215,7 @@ describe('useCalendarDay boundary refresh', () => {
 describe('small branch tails', () => {
   it('AssistantMarkdown single-line reasoning summary skips the newline cut', () => {
     const view = render(
-      <AssistantMarkdown blocks={[{ kind: 'reasoning', text: 'one-liner' }]} streaming={false} />,
+      <AssistantMarkdown t={t} blocks={[{ kind: 'reasoning', text: 'one-liner' }]} streaming={false} />,
     )
     expect(view.getByText('one-liner')).toBeTruthy()
   })
@@ -187,6 +230,7 @@ describe('small branch tails', () => {
     const time = new Date(now.getFullYear(), now.getMonth(), now.getDate(), 14, 24).getTime()
     const settled = render(
       <AssistantMarkdown
+        t={t}
         blocks={[{ kind: 'text', text: 'answer body' }, { kind: 'reasoning', text: 'hidden' }]}
         streaming={false}
         time={time}
@@ -201,6 +245,7 @@ describe('small branch tails', () => {
 
     const thinkOnly = render(
       <AssistantMarkdown
+        t={t}
         blocks={[{ kind: 'reasoning', text: 'only thinking' }]}
         streaming={false}
         time={time}
@@ -211,7 +256,7 @@ describe('small branch tails', () => {
     thinkOnly.unmount()
 
     const streaming = render(
-      <AssistantMarkdown blocks={[{ kind: 'text', text: 'partial' }]} streaming time={time} />,
+      <AssistantMarkdown t={t} blocks={[{ kind: 'text', text: 'partial' }]} streaming time={time} />,
     )
     expect(streaming.queryByRole('button', { name: '复制' })).toBeNull()
     expect(streaming.queryByText('14:24')).toBeNull()

packages/client/ui-conversation/tests/chat-code-subcalls.spec.tsx

@@ -137,7 +137,9 @@ async function bench(snapshot: ConversationSnapshot) {
   }
   ctx.provide('workspaces', workspaces)
   ctx.provide('layout', layout)
-  ctx.provide('locale', new LocaleService(ctx))
+  const locale = new LocaleService(ctx)
+  ctx.provide('locale', locale)
+  slots.installLocale(locale)
 
   slots.install(createSlotRenderer())
   slots.register({

packages/client/ui-conversation/tests/chat-stats-bash-sample.spec.tsx

@@ -11,9 +11,16 @@ import type {
 } from '@deepseek-ai/dsh-client-runtime/client'
 import { createSnapshotStore } from '@deepseek-ai/dsh-client-runtime/client'
 import { bindSnapshotSelector } from '@deepseek-ai/dsh-client-web-react'
-import type { ToolRowProps } from '@deepseek-ai/dsh-client-ui-conversation/client'
+import { makeTranslate } from '@deepseek-ai/dsh-client-test-runtime'
+import { zh as commonZh } from '@deepseek-ai/dsh-client-locale/src/locales/zh.ts'
 import { StatsLine, deriveStats, formatDuration, formatTokens, type StatsLineProps } from '../src/client/chat/StatsLine.tsx'
 import { BashRow } from '../src/client/toolviews/bash-sample.tsx'
+import { zh } from '../src/client/locales.ts'
+
+type BashRowProps = Parameters<typeof BashRow>[0]
+
+// Mirrors the real lookup chain (conversation namespace, then common).
+const t: BashRowProps['t'] = makeTranslate(zh, commonZh)
 
 afterEach(cleanup)
 
@@ -168,12 +175,13 @@ describe('bash sample row', () => {
 
   const rowProps = (sessionId: SessionId, over?: {
     store?: ReturnType<typeof listStore>
-  }): ToolRowProps => ({
+  }): BashRowProps => ({
     callId: 'c1', toolName: 'bash', block: result('c1'),
     openFile: vi.fn(),
     sessionId,
     useSessions: bindSnapshotSelector(over?.store ?? listStore()),
-  } as unknown as ToolRowProps)
+    t,
+  } as unknown as BashRowProps)
 
   it('differential rendering: the scoped variant in sub-sessions, global at roots', () => {
     const scoped = render(<BashRow {...rowProps(CHILD)} />)

packages/client/ui-conversation/tests/chat-tool-row.spec.tsx

@@ -4,11 +4,16 @@ import { cleanup, fireEvent, render } from '@testing-library/react'
 
 afterEach(cleanup)
 import type { RunningToolCall, ToolResultNode } from '@deepseek-ai/dsh-client-runtime/client'
+import { makeTranslate } from '@deepseek-ai/dsh-client-test-runtime'
+import { zh as commonZh } from '@deepseek-ai/dsh-client-locale/src/locales/zh.ts'
 import { classifyTool, resolveToolPath, toolRowModel } from '../src/client/contract/tool-call-model.ts'
 import { AssistantMarkdown } from '../src/client/chat/AssistantMarkdown.tsx'
 import { ToolRow } from '../src/client/chat/ToolRow.tsx'
-import { GenericToolCard } from '../src/client/chat/GenericToolCard.tsx'
-import type { ToolRowOwnerProps } from '@deepseek-ai/dsh-client-ui-conversation/client'
+import { GenericToolCard, type GenericToolCardProps } from '../src/client/chat/GenericToolCard.tsx'
+import { zh } from '../src/client/locales.ts'
+
+// Mirrors the real lookup chain (conversation namespace, then common).
+const t: GenericToolCardProps['t'] = makeTranslate(zh, commonZh)
 
 const running = (over?: Partial<RunningToolCall>): RunningToolCall => ({
   callId: 'c1', name: 'bash', argsRaw: '{"command":"ls -la","description":"List files"}',
@@ -132,6 +137,7 @@ describe('tool-call-model', () => {
 
 describe('ToolRow', () => {
   const rowProps = {
+    t,
     variant: 'bash' as const, icon: <i data-testid="tool-icon" />, title: 'Bash',
     summary: 'List files', body: '{\n  "a": 1\n}', state: 'ok' as const,
   }
@@ -221,6 +227,7 @@ describe('ThinkRow', () => {
   it('expands from either Think or the reasoning summary', () => {
     const view = render(
       <AssistantMarkdown
+        t={t}
         blocks={[{ kind: 'reasoning', text: 'Inspect the session\nCheck persistence' }]}
         streaming={false}
       />,
@@ -237,8 +244,8 @@ describe('ThinkRow', () => {
 })
 
 describe('GenericToolCard', () => {
-  const props = (toolName: string, block: RunningToolCall | ToolResultNode): ToolRowOwnerProps => ({
-    callId: 'c1', toolName, block, openFile: vi.fn(),
+  const props = (toolName: string, block: RunningToolCall | ToolResultNode): GenericToolCardProps => ({
+    callId: 'c1', toolName, block, openFile: vi.fn(), t,
   })
 
   it('renders the classified variant row from the frozen slice', () => {

packages/client/ui-conversation/tests/chat-toolview-slot.spec.tsx

@@ -65,7 +65,9 @@ async function bench(nodes: ToolResultNode[]) {
   const runtime = await SlotTestRuntime.create()
   const layout = { openDetails: vi.fn(), closeDetails: vi.fn() }
   runtime.provide('layout', layout)
-  runtime.provide('locale', new LocaleService(runtime.ctx))
+  const locale = new LocaleService(runtime.ctx)
+  runtime.provide('locale', locale)
+  runtime.slots.installLocale(locale)
   await runtime.sessions.add({
     id: SID,
     summary: { title: 'S', displayTitle: 'S' },
@@ -193,7 +195,9 @@ describe('registrant load-order seam', () => {
   it("suspends a registrant on inject: ['slots', 'conversation'] until the service (and the hole) exists", async () => {
     const runtime = await SlotTestRuntime.create()
     runtime.provide('layout', { openDetails: vi.fn(), closeDetails: vi.fn() })
-    runtime.provide('locale', new LocaleService(runtime.ctx))
+    const locale = new LocaleService(runtime.ctx)
+    runtime.provide('locale', locale)
+    runtime.slots.installLocale(locale)
     await runtime.root.declare(LAYOUT_CHILDREN, AppRoot)
 
     // Third-party posture, mounted BEFORE ui-conversation: real fiber inject

packages/client/ui-conversation/tests/chat-view.spec.tsx

@@ -14,9 +14,12 @@ import { bindSnapshotSelector } from '@deepseek-ai/dsh-client-web-react'
 import { createSnapshotStore, PendingWait } from '@deepseek-ai/dsh-client-runtime/client'
 import { RpcId } from '@deepseek-ai/dsh-client-connection/client'
 import type { ChatViewSlotProps, SelectionTarget } from '@deepseek-ai/dsh-client-ui-conversation/client'
+import { makeTranslate } from '@deepseek-ai/dsh-client-test-runtime'
+import { zh as commonZh } from '@deepseek-ai/dsh-client-locale/src/locales/zh.ts'
 import { createChatStore } from '../src/client/stores.ts'
 import { ChatView } from '../src/client/chat/ChatView.tsx'
-import { deriveChatFlow, flowKeys } from '../src/client/chat/chat-flow.ts'
+import { zh } from '../src/client/locales.ts'
+import { assistantActionsSeqs, deriveChatFlow, flowKeys } from '../src/client/chat/chat-flow.ts'
 
 afterEach(cleanup)
 // Keyless create() persists under the bare declared key; clear between cases
@@ -61,8 +64,8 @@ const user = (seq: number, text: string): UserMessageNode => ({
   content: [{ type: 'text', text }] as never,
   source: null,
 })
-const assistant = (seq: number, text: string): AssistantMessageNode => ({
-  kind: 'assistant', seq, time: seq * 1_000, turn: 1, step: 1, blocks: [{ kind: 'text', text }],
+const assistant = (seq: number, text: string, turn = 1): AssistantMessageNode => ({
+  kind: 'assistant', seq, time: seq * 1_000, turn, step: 1, blocks: [{ kind: 'text', text }],
 })
 const toolResult = (seq: number, callId: string, name = 'bash'): ToolResultNode => ({
   kind: 'tool-result', seq, time: seq * 1_000, callId,
@@ -94,6 +97,7 @@ function makeHarness(init?: Partial<ConversationSnapshot>) {
   const openDetails = vi.fn<(t: SelectionTarget) => void>()
   const openFile = vi.fn<(path: string) => void>()
   const loadOlder = vi.fn()
+  const forkAt = vi.fn()
   // Selection rides the REAL chat store (same construction path as
   // production; the view reads it through the PropsStore useStore share).
   // renderSlot stub renders the render-site fallback (an empty keyed ledger:
@@ -120,9 +124,12 @@ function makeHarness(init?: Partial<ConversationSnapshot>) {
     openDetails,
     openFile,
     loadOlder,
+    forkAt,
+    // Mirrors the real lookup chain (conversation namespace, then common).
+    t: makeTranslate(zh, commonZh),
   }
   const setSelection = (next: SelectionTarget | null): void => { chat.actions.select(next) }
-  return { set, ChatView, props, openDetails, openFile, loadOlder, setSelection }
+  return { set, ChatView, props, openDetails, openFile, loadOlder, forkAt, setSelection }
 }
 
 describe('chat-flow derivation', () => {
@@ -154,6 +161,23 @@ describe('chat-flow derivation', () => {
     expect(flowKeys(deriveChatFlow([toolResult(3, 'a'), { ...headsOnly, interrupted: true }, toolResult(5, 'b')]))).toBe('g3|n4|g5')
     expect(flowKeys(deriveChatFlow([toolResult(3, 'a'), assistant(4, 'found'), toolResult(5, 'b')]))).toBe('g3|n4|g5')
   })
+
+  it('assistantActionsSeqs keeps only the last content assistant per turn', () => {
+    const thinkOnly: AssistantMessageNode = {
+      kind: 'assistant', seq: 3, time: 3_000, turn: 1, step: 2,
+      blocks: [{ kind: 'reasoning', text: 'planning' }],
+    }
+    const seqs = assistantActionsSeqs([
+      user(1, 'hi'),
+      assistant(2, 'looking', 1),
+      thinkOnly,
+      toolResult(4, 'a'),
+      assistant(5, 'done', 1),
+      user(6, 'again'),
+      assistant(7, 'second turn', 2),
+    ])
+    expect([...seqs].sort((a, b) => a - b)).toEqual([5, 7])
+  })
 })
 
 describe('ChatView', () => {
@@ -194,6 +218,33 @@ describe('ChatView', () => {
     expect(view.getByText('run a')).toBeTruthy()
   })
 
+  it('shows assistant IconActions only on the last content message of each turn', () => {
+    const h = makeHarness({
+      nodes: [
+        user(1, 'hi'),
+        assistant(2, 'mid-turn text'),
+        toolResult(3, 'a'),
+        assistant(4, 'final answer'),
+        user(5, 'next'),
+        assistant(6, 'second turn', 2),
+      ],
+    })
+    const view = render(<h.ChatView {...h.props} />)
+    // 2 user + 2 turn-tail assistants; mid-turn text at seq 2 stays chrome-free.
+    expect(view.getAllByRole('button', { name: '复制' })).toHaveLength(4)
+    expect(view.getAllByRole('button', { name: '在新对话中分支' })).toHaveLength(4)
+  })
+
+  it('forks from both user and finalized assistant message actions at their event seq', () => {
+    const h = makeHarness({ nodes: [user(1, 'question'), assistant(2, 'answer')] })
+    const view = render(<h.ChatView {...h.props} />)
+    const buttons = view.getAllByRole('button', { name: '在新对话中分支' })
+    expect(buttons).toHaveLength(2)
+    fireEvent.click(buttons[0]!)
+    fireEvent.click(buttons[1]!)
+    expect(h.forkAt.mock.calls).toEqual([[1], [2]])
+  })
+
   it('renders assistant Markdown across history, streaming, final, and interrupted states while user text stays literal', () => {
     const markdown = '# Rendered\n\n- **one**\n- `two`'
     const h = makeHarness({ nodes: [user(1, markdown), assistant(2, markdown)] })
@@ -448,10 +499,14 @@ describe('ChatView', () => {
       name: 'plan', args: '', outcome: { kind: 'success', text: '已进入 plan mode' },
       ...over,
     })
-    // Settled success: the command line is the title, the outcome text the summary.
-    const settled = makeHarness({ nodes: [user(1, 'hi'), command({})] })
+    // Settled success: the bare command name is the title, the outcome text
+    // the summary — neither the dispatched `/` nor its arguments reach the row
+    // (the settlement text already says what the command did).
+    const settled = makeHarness({ nodes: [user(1, 'hi'), command({ args: ' now' })] })
     const view = render(<settled.ChatView {...settled.props} />)
-    expect(view.getByText('/plan')).toBeTruthy()
+    expect(view.getByText('plan')).toBeTruthy()
+    expect(view.queryByText('/plan')).toBeNull()
+    expect(view.queryByText('/plan now')).toBeNull()
     expect(view.getByText('已进入 plan mode')).toBeTruthy()
 
     // Error outcome flips the row state; a text-less error gets the default copy.

packages/client/ui-conversation/tests/coverage-tails.spec.tsx

@@ -8,12 +8,19 @@ import { cleanup, render } from '@testing-library/react'
 import { createSnapshotStore } from '@deepseek-ai/dsh-client-runtime/client'
 import { bindSnapshotSelector } from '@deepseek-ai/dsh-client-web-react'
 import type { RunningToolCall, SessionId, SessionListState, ToolResultNode } from '@deepseek-ai/dsh-client-runtime/client'
-import type { ToolRowOwnerProps, ToolRowProps } from '@deepseek-ai/dsh-client-ui-conversation/client'
+import { makeTranslate } from '@deepseek-ai/dsh-client-test-runtime'
+import { zh as commonZh } from '@deepseek-ai/dsh-client-locale/src/locales/zh.ts'
 import { apply as nodeApply } from '../src/index.ts'
-import { GenericToolCard } from '../src/client/chat/GenericToolCard.tsx'
+import { GenericToolCard, type GenericToolCardProps } from '../src/client/chat/GenericToolCard.tsx'
 import { ToolRow } from '../src/client/chat/ToolRow.tsx'
 import { AssistantMarkdown } from '../src/client/chat/AssistantMarkdown.tsx'
 import { BashRow } from '../src/client/toolviews/bash-sample.tsx'
+import { zh } from '../src/client/locales.ts'
+
+type BashRowProps = Parameters<typeof BashRow>[0]
+
+// Mirrors the real lookup chain (conversation namespace, then common).
+const t: GenericToolCardProps['t'] = makeTranslate(zh, commonZh)
 
 afterEach(cleanup)
 
@@ -24,7 +31,7 @@ describe('tails', () => {
 
   it('ToolRow stopped state renders the warning dot in the leading slot', () => {
     const view = render(
-      <ToolRow variant="bash" icon={<i data-testid="icon" />} title="Bash" summary="s" body={null} state="stopped" />,
+      <ToolRow t={t} variant="bash" icon={<i data-testid="icon" />} title="Bash" summary="s" body={null} state="stopped" />,
     )
     expect(view.queryByTestId('icon')).toBeNull()
     expect(view.container.querySelector('[data-state="stopped"]')).not.toBeNull()
@@ -33,6 +40,7 @@ describe('tails', () => {
   it('AssistantMarkdown renders reasoning as a Think row and unknown blocks as JSON fallback', () => {
     const view = render(
       <AssistantMarkdown
+        t={t}
         blocks={[
           { kind: 'reasoning', text: 'thinking hard\nsecond line' },
           { kind: 'tool-call', callId: 'c', name: 'bash', argsRaw: '{}' },
@@ -45,7 +53,7 @@ describe('tails', () => {
     expect(view.getByText('thinking hard')).toBeTruthy()
     expect(view.getByText(/未知内容块/)).toBeTruthy()
     const stopped = render(
-      <AssistantMarkdown blocks={[{ kind: 'text', text: 'partial words' }]} streaming={false} interrupted />,
+      <AssistantMarkdown t={t} blocks={[{ kind: 'text', text: 'partial words' }]} streaming={false} interrupted />,
     )
     expect(stopped.getByText('已停止')).toBeTruthy()
   })
@@ -55,12 +63,13 @@ describe('tails', () => {
     // groups is layout noise (no text, no pulse, no interrupted marker).
     const empty = render(
       <AssistantMarkdown
+        t={t}
         blocks={[{ kind: 'tool-call', callId: 'c', name: 'todo_write', argsRaw: '{}' }]}
         streaming={false}
       />,
     )
     expect(empty.container.firstChild).toBeNull()
-    const blank = render(<AssistantMarkdown blocks={[]} streaming={false} />)
+    const blank = render(<AssistantMarkdown t={t} blocks={[]} streaming={false} />)
     expect(blank.container.firstChild).toBeNull()
   })
 
@@ -71,8 +80,8 @@ describe('tails', () => {
       callTime: 1_000,
       content: [], isError: false, callView: null, resultView: null,
     }
-    const props: ToolRowOwnerProps = {
-      callId: 'c5', toolName: 'todo_write', block: settled, openFile: vi.fn(),
+    const props: GenericToolCardProps = {
+      callId: 'c5', toolName: 'todo_write', block: settled, openFile: vi.fn(), t,
     }
     const view = render(<GenericToolCard {...props} />)
     // Settled ok state keeps the variant icon (sparkle) instead of a StateDot.
@@ -91,7 +100,8 @@ describe('tails', () => {
     const props = (block: RunningToolCall | ToolResultNode) => ({
       callId: 'c1', toolName: 'bash', block, openFile: vi.fn(),
       sessionId: sid, useSessions: bindSnapshotSelector(list),
-    } as unknown as ToolRowProps)
+      t,
+    } as unknown as BashRowProps)
 
     const running: RunningToolCall = {
       callId: 'c1', name: 'bash', argsRaw: '{"command":"ls","description":"List"}',

packages/client/ui-conversation/tests/gate-branch-tails.spec.tsx

@@ -7,10 +7,16 @@ import { createSnapshotStore } from '@deepseek-ai/dsh-client-runtime/client'
 import type { UseSession } from '@deepseek-ai/dsh-client-web-react'
 import type { ConversationSnapshot, SessionId, SessionListState, WorkspaceListState } from '@deepseek-ai/dsh-client-runtime/client'
 import type { SelectionTarget } from '@deepseek-ai/dsh-client-ui-conversation/client'
+import { makeTranslate } from '@deepseek-ai/dsh-client-test-runtime'
+import { zh as commonZh } from '@deepseek-ai/dsh-client-locale/src/locales/zh.ts'
 import { createChatStore } from '../src/client/stores.ts'
-import { AssistantMarkdown } from '../src/client/chat/AssistantMarkdown.tsx'
+import { AssistantMarkdown, type AssistantMarkdownProps } from '../src/client/chat/AssistantMarkdown.tsx'
 import { StatsLine } from '../src/client/chat/StatsLine.tsx'
 import { DetailsPanel } from '../src/client/skeleton/DetailsPanel.tsx'
+import { zh } from '../src/client/locales.ts'
+
+// Mirrors the real lookup chain (conversation namespace, then common).
+const t: AssistantMarkdownProps['t'] = makeTranslate(zh, commonZh)
 
 afterEach(cleanup)
 
@@ -28,6 +34,7 @@ describe('render branch tails', () => {
   it('AssistantMarkdown reasoning row is ok-state when not the streaming tail', () => {
     const view = render(
       <AssistantMarkdown
+        t={t}
         blocks={[{ kind: 'reasoning', text: 'done thinking' }, { kind: 'text', text: 'answer' }]}
         streaming
       />,
@@ -54,7 +61,7 @@ describe('render branch tails', () => {
 
   it('AssistantMarkdown reasoning as the streaming tail renders the running ring', () => {
     const view = render(
-      <AssistantMarkdown blocks={[{ kind: 'reasoning', text: 'still thinking' }]} streaming />,
+      <AssistantMarkdown t={t} blocks={[{ kind: 'reasoning', text: 'still thinking' }]} streaming />,
     )
     expect(view.container.querySelector('[data-state="running"]')).not.toBeNull()
   })
@@ -82,6 +89,7 @@ describe('render branch tails', () => {
         useStore={bindSnapshotSelector(chat)}
         actions={chat.actions}
         closeDetails={vi.fn()}
+        t={t}
       />,
     )
     expect(view.getByText('详情')).toBeTruthy()
@@ -118,6 +126,7 @@ describe('render branch tails', () => {
         useStore={bindSnapshotSelector(chat)}
         actions={chat.actions}
         closeDetails={vi.fn()}
+        t={t}
       />,
     )
     // Sub-call material: the sub-tool name titles the panel, args pretty-print,

packages/client/ui-conversation/tests/input-bar.spec.tsx

@@ -8,10 +8,13 @@ import { afterEach, describe, expect, it, vi } from 'vitest'
 import { act, cleanup, fireEvent, render } from '@testing-library/react'
 import { bindSnapshotSelector } from '@deepseek-ai/dsh-client-web-react'
 import { createSnapshotStore } from '@deepseek-ai/dsh-client-runtime/client'
+import { makeTranslate } from '@deepseek-ai/dsh-client-test-runtime'
+import { zh as commonZh } from '@deepseek-ai/dsh-client-locale/src/locales/zh.ts'
 import type { ClientContext, ConversationSnapshot, SessionId } from '@deepseek-ai/dsh-client-runtime/client'
 import { SessionInputShell } from '../src/client/input/facade.ts'
 import { InputBar } from '../src/client/skeleton/InputBar.tsx'
 import type { InputBarProps } from '../src/client/skeleton/InputBar.tsx'
+import { zh } from '../src/client/locales.ts'
 
 afterEach(cleanup)
 
@@ -42,7 +45,7 @@ interface BenchOptions {
   promptError?: ConversationSnapshot['promptError']
   variant?: 'hero' | 'composer'
   placeholder?: string
-  translateHint?: (key: string) => string
+  t?: InputBarProps['t']
   accessory?: React.ReactNode
   overlay?: React.ReactNode
   leftItems?: React.ReactNode
@@ -101,11 +104,8 @@ function bench(over?: BenchOptions) {
     useLexicon: bindSnapshotSelector(shell.lexicon),
     stop,
     command: () => Promise.resolve(true),
-    // Mirrors the en 'command.hint' locale entries the production apply wires in.
-    translateHint: over?.translateHint ?? ((key: string) => ({
-      'placeholder.default': 'Message the agent',
-      'placeholder.plan': 'describe your task to generate plan',
-    } as Record<string, string>)[key] ?? key),
+    // Mirrors the real lookup chain (conversation namespace, then common).
+    t: over?.t ?? makeTranslate(zh, commonZh),
     renderSlot,
     variant: over?.variant ?? 'composer',
     ...(over?.placeholder !== undefined ? { placeholder: over.placeholder } : {}),
@@ -118,7 +118,7 @@ function bench(over?: BenchOptions) {
   const textarea = view.container.querySelector('textarea')!
   // aria-label (not role name): title carries the same label and would double-match.
   const button = view.container.querySelector<HTMLButtonElement>(
-    `button[aria-label="${over?.running === true ? 'Stop generating' : 'Send message'}"]`,
+    `button[aria-label="${over?.running === true ? '停止生成' : '发送消息'}"]`,
   )!
   return { view, textarea, button, props, sink, shell, wiring: shell, session, stop, slotCalls }
 }
@@ -196,7 +196,7 @@ describe('running and lock semantics (queue cut 1)', () => {
     fireEvent.change(textarea, { target: { value: '排队消息2' } })
     fireEvent.keyDown(textarea, { key: 'Enter' })
     expect(sink).toHaveBeenCalledWith('排队消息2', 'queue')
-    expect(button.getAttribute('aria-label')).toBe('Stop generating')
+    expect(button.getAttribute('aria-label')).toBe('停止生成')
     fireEvent.click(button)
     expect(stop).toHaveBeenCalledTimes(1)
   })
@@ -204,8 +204,8 @@ describe('running and lock semantics (queue cut 1)', () => {
   it('disabled (session removed) locks the textarea and chrome', () => {
     const { textarea, view } = bench({ disabled: true })
     expect(textarea.disabled).toBe(true)
-    expect(textarea.placeholder).toBe('Session unavailable')
-    expect((view.getByLabelText('Add attachment') as HTMLButtonElement).disabled).toBe(true)
+    expect(textarea.placeholder).toBe('会话不可用')
+    expect((view.getByLabelText('添加附件') as HTMLButtonElement).disabled).toBe(true)
   })
 
   it('idle primary sends and disables on empty draft', () => {
@@ -222,7 +222,7 @@ describe('running and lock semantics (queue cut 1)', () => {
     const textarea = first.view.container.querySelector('textarea')!
     expect(document.activeElement).toBe(textarea)
     textarea.blur()
-    fireEvent.mouseDown(first.view.container.querySelector('button[aria-label="Send message"]')!)
+    fireEvent.mouseDown(first.view.container.querySelector('button[aria-label="发送消息"]')!)
     expect(document.activeElement).toBe(textarea)
   })
 
@@ -285,22 +285,22 @@ describe('running and lock semantics (queue cut 1)', () => {
 
   it('disabled state shows the unavailable placeholder; custom placeholder wins', () => {
     const { textarea } = bench({ disabled: true })
-    expect(textarea.placeholder).toBe('Session unavailable')
+    expect(textarea.placeholder).toBe('会话不可用')
     const live = bench()
-    expect(live.textarea.placeholder).toBe('Message the agent')
+    expect(live.textarea.placeholder).toBe('给智能体发消息')
     const custom = bench({ placeholder: 'Custom placeholder' })
     expect(custom.textarea.placeholder).toBe('Custom placeholder')
   })
 
   it('the plan projection swaps the placeholder while its effective target is plan mode', () => {
     const active = bench({ plan: { active: true, pending: false } })
-    expect(active.textarea.placeholder).toBe('describe your task to generate plan')
+    expect(active.textarea.placeholder).toBe('描述你的任务以生成计划')
     // /plan just ran: pending entry already reads as the plan target.
     const entering = bench({ plan: { active: false, pending: true } })
-    expect(entering.textarea.placeholder).toBe('describe your task to generate plan')
+    expect(entering.textarea.placeholder).toBe('描述你的任务以生成计划')
     // Pending exit: target is default again.
     const leaving = bench({ plan: { active: true, pending: true } })
-    expect(leaving.textarea.placeholder).toBe('Message the agent')
+    expect(leaving.textarea.placeholder).toBe('给智能体发消息')
     // Owner placeholder outranks the plan swap.
     const custom = bench({ plan: { active: true, pending: false }, placeholder: 'Custom placeholder' })
     expect(custom.textarea.placeholder).toBe('Custom placeholder')
@@ -325,13 +325,14 @@ describe('machine pending lock', () => {
     expect(shell.snapshot.phase).toBe('submitting')
     const textarea = view.container.querySelector('textarea')!
     expect(textarea.readOnly).toBe(true)
-    expect(view.container.querySelector<HTMLButtonElement>('button[aria-label="Send message"]')!.disabled).toBe(true)
+    expect(view.container.querySelector<HTMLButtonElement>('button[aria-label="发送消息"]')!.disabled).toBe(true)
   })
 })
 
 describe('decorations', () => {
   it('claimed token renders the mirror highlight and the blank-args hint', () => {
-    const { view, shell } = bench()
+    // Dictionary-less stub: an unmatched hint key keeps the machine's raw hint.
+    const { view, shell } = bench({ t: makeTranslate({}) })
     act(() => {
       shell.setDraft('/goal ')
       shell.beginCommand(
@@ -349,8 +350,7 @@ describe('decorations', () => {
   })
 
   it('a locale entry for the claimed command overrides the raw claim hint (trailing-space token)', () => {
-    const dict: Record<string, string> = { goal: '输入目标，智能体将持续执行' }
-    const { view, shell } = bench({ translateHint: key => dict[key] ?? key })
+    const { view, shell } = bench()
     act(() => {
       shell.setDraft('/goal ')
       shell.beginCommand(
@@ -441,9 +441,9 @@ describe('strips and variants', () => {
 describe('placeholder chrome and control seats', () => {
   it('renders attach; the Access chip is absent without the permissions projection; plan/model seats render EMPTY without entries (B ruling)', () => {
     const { view, slotCalls } = bench()
-    expect(view.getByLabelText('Add attachment')).toBeTruthy()
+    expect(view.getByLabelText('添加附件')).toBeTruthy()
     // Capability absent (no projection value): the chip renders nothing.
-    expect(view.queryByLabelText(/^Access mode/)).toBeNull()
+    expect(view.queryByLabelText(/^访问模式/)).toBeNull()
     // Both seats dispatched, nothing rendered.
     expect(slotCalls.map(c => c.key)).toEqual(['conversation.input.plan', 'conversation.input.model'])
     expect(view.queryByLabelText('Plan mode')).toBeNull()
@@ -459,7 +459,7 @@ describe('placeholder chrome and control seats', () => {
       currentValue: 'workspace-write',
     }
     const { view } = bench({ permissions })
-    const trigger = view.getByLabelText(/^Access mode/) as HTMLButtonElement
+    const trigger = view.getByLabelText(/^访问模式/) as HTMLButtonElement
     // Title-case display is presentation only; the menu ids stay machine names.
     expect(trigger.textContent).toBe('Workspace Write')
     fireEvent.click(trigger)
@@ -467,11 +467,11 @@ describe('placeholder chrome and control seats', () => {
     expect(items.map(o => o.textContent)).toEqual(['Workspace Write', 'Danger Full Access'])
     fireEvent.click(items[1]!)
     // Optimistic pick + disable until admission resolves (command stub resolves true).
-    const busy = view.getByLabelText(/^Access mode/) as HTMLButtonElement
+    const busy = view.getByLabelText(/^访问模式/) as HTMLButtonElement
     expect(busy.textContent).toBe('Danger Full Access')
     expect(busy.disabled).toBe(true)
     await act(async () => {})
-    expect((view.getByLabelText(/^Access mode/) as HTMLButtonElement).disabled).toBe(false)
+    expect((view.getByLabelText(/^访问模式/) as HTMLButtonElement).disabled).toBe(false)
   })
 
   it('a registered entry fills its seat and receives the locked owner prop', () => {
@@ -492,10 +492,10 @@ describe('placeholder chrome and control seats', () => {
   it('disabled locks the Access chip and attach control (running does not)', () => {
     const permissions = { options: [{ value: 'workspace-write', name: 'workspace-write' }], currentValue: 'workspace-write' }
     const { view } = bench({ disabled: true, permissions })
-    expect((view.getByLabelText('Add attachment') as HTMLButtonElement).disabled).toBe(true)
-    expect((view.getByLabelText(/^Access mode/) as HTMLButtonElement).disabled).toBe(true)
+    expect((view.getByLabelText('添加附件') as HTMLButtonElement).disabled).toBe(true)
+    expect((view.getByLabelText(/^访问模式/) as HTMLButtonElement).disabled).toBe(true)
     cleanup()
     const live = bench({ running: true, permissions })
-    expect((live.view.getByLabelText(/^Access mode/) as HTMLButtonElement).disabled).toBe(false)
+    expect((live.view.getByLabelText(/^访问模式/) as HTMLButtonElement).disabled).toBe(false)
   })
 })