feat(web): localize the subagent catalog and read-only composer copy

The catalog action (diagnostics, relative times, loading/error/retry,
mode and activity labels, branch toggles, descendant counts, tree aria)
and the read-only composer were hardcoded to Simplified Chinese, so an
English-locale session rendered mixed-language UI. Register a `subagent`
locale namespace (zh source of truth + en dictionary), declare it on both
slot registrations, thread the locale `t` seat through the components, and
mount the locale service in the plugin specs.

The UI spec's zh assertions now run against the real dictionary through a
`t` stub that interpolates `{name}` params exactly like the locale
service.

packages/client/ui-subagent/src/client/SubagentCatalogAction.tsx

@@ -7,7 +7,8 @@ import type {
 import {
   IconChevronDownOutline14, IconChevronRightOutline14, IconRefreshOutline14, StateDot,
 } from '@deepseek-ai/dsh-client-ui-primitives'
-import type { PropsRuntime } from '@deepseek-ai/dsh-client-ui-slots'
+import type { PropsLocale, PropsRuntime, TranslateNS } from '@deepseek-ai/dsh-client-ui-slots'
+import { NS } from './locales.ts'
 import type {} from '@deepseek-ai/dsh-client-ui-conversation/client'
 import css from './SubagentCatalogAction.module.css'
 
@@ -23,7 +24,7 @@ export interface SubagentCatalogInjected {
 
 /** Full props for the session-header catalog action. */
 export type SubagentCatalogActionProps =
-  PropsRuntime<'conversation.session.header.actions'> & SubagentCatalogInjected
+  PropsRuntime<'conversation.session.header.actions'> & SubagentCatalogInjected & PropsLocale<typeof NS>
 
 interface CatalogRowsProps {
   parentSessionId: SessionId
@@ -39,11 +40,14 @@ interface CatalogRowsProps {
   closeCatalog: () => void
 }
 
-function diagnosticReason(entry: Extract<CatalogEntry, { kind: 'diagnostic' }>): string {
+function diagnosticReason(
+  entry: Extract<CatalogEntry, { kind: 'diagnostic' }>,
+  t: TranslateNS<typeof NS>,
+): string {
   switch (entry.reason) {
-    case 'corrupt': return '会话记录损坏'
-    case 'unsupported': return '子代理记录版本不受支持'
-    case 'unavailable': return '会话记录暂不可用'
+    case 'corrupt': return t('diagnostic.corrupt')
+    case 'unsupported': return t('diagnostic.unsupported')
+    case 'unavailable': return t('diagnostic.unavailable')
   }
 }
 
@@ -54,18 +58,22 @@ function treeItems(root: HTMLDivElement | null): HTMLElement[] {
 }
 
 /** Compact trailing activity time for a catalog row. */
-function relativeTime(updatedAt: number | undefined, now: number): string | undefined {
+function relativeTime(
+  updatedAt: number | undefined,
+  now: number,
+  t: TranslateNS<typeof NS>,
+): string | undefined {
   if (updatedAt === undefined) return undefined
   const minute = 60_000
   const hour = 60 * minute
   const day = 24 * hour
   const diff = Math.max(0, now - updatedAt)
-  if (diff < minute) return '刚刚'
-  if (diff < hour) return `${Math.floor(diff / minute)}分钟`
-  if (diff < day) return `${Math.floor(diff / hour)}小时`
-  if (diff < 30 * day) return `${Math.floor(diff / day)}天`
-  if (diff < 365 * day) return `${Math.floor(diff / (30 * day))}个月`
-  return `${Math.floor(diff / (365 * day))}年`
+  if (diff < minute) return t('time.justNow')
+  if (diff < hour) return t('time.minutes', { n: Math.floor(diff / minute) })
+  if (diff < day) return t('time.hours', { n: Math.floor(diff / hour) })
+  if (diff < 30 * day) return t('time.days', { n: Math.floor(diff / day) })
+  if (diff < 365 * day) return t('time.months', { n: Math.floor(diff / (30 * day)) })
+  return t('time.years', { n: Math.floor(diff / (365 * day)) })
 }
 
 /** Aggregate the complete subagent-only descendant subtree from flat summaries. */
@@ -98,28 +106,30 @@ function CatalogLoadingRows({
   parentSessionId,
   summaries,
   level,
+  t,
 }: {
   parentSessionId: SessionId
   summaries: Readonly<Record<SessionId, SessionSummary>>
   level: number
+  t: TranslateNS<typeof NS>
 }) {
   const children = Object.values(summaries).filter(summary => (
     summary.origin === 'subagent' && summary.parentId === parentSessionId
   ))
-  if (children.length === 0) return <div className={css.notice}>正在加载子代理…</div>
+  if (children.length === 0) return <div className={css.notice}>{t('loading.label')}</div>
   return children.map(summary => (
     <div key={summary.id} className={css.node}>
       <div
         role="treeitem"
         aria-disabled="true"
         aria-level={level}
-        aria-label="正在加载子代理"
+        aria-label={t('loading.aria')}
         className={`${css.row} ${css.disabled} ${css.loadingRow}`}
       >
         <span className={css.disclosureSpace} />
         <StateDot state={summary.running ? 'ongoing' : 'done'} />
         <span className={css.content}>
-          <span className={css.label}>正在加载子代理…</span>
+          <span className={css.label}>{t('loading.label')}</span>
         </span>
       </div>
     </div>
@@ -129,8 +139,8 @@ function CatalogLoadingRows({
 /** Render one catalog level and recurse only through explicitly expanded rows. */
 function CatalogRows({
   parentSessionId, catalog, catalogs, summaries, expanded, level, now,
-  openChild, refresh, toggleBranch, closeCatalog,
-}: CatalogRowsProps) {
+  openChild, refresh, toggleBranch, closeCatalog, t,
+}: CatalogRowsProps & { t: TranslateNS<typeof NS> }) {
   const emptyLoading = catalog.state === 'loading' && catalog.entries.length === 0
   return (
     <>
@@ -139,24 +149,25 @@ function CatalogRows({
           parentSessionId={parentSessionId}
           summaries={summaries}
           level={level}
+          t={t}
         />
       )}
       {catalog.state === 'error' && (
         <div className={css.error}>
-          <span>{catalog.error?.message ?? '无法加载子代理'}</span>
+          <span>{catalog.error?.message ?? t('load.error')}</span>
           <button
             type="button"
             className={css.refresh}
             onClick={() => { refresh(parentSessionId) }}
           >
             <IconRefreshOutline14 />
-            重试
+            {t('retry')}
           </button>
         </div>
       )}
       {catalog.entries.map((entry) => {
         if (entry.kind === 'diagnostic') {
-          const reason = diagnosticReason(entry)
+          const reason = diagnosticReason(entry, t)
           return (
             <div key={entry.id} className={css.node}>
               <div
@@ -185,12 +196,12 @@ function CatalogRows({
           || (childCatalog.state === 'loading' && childCatalog.entries.length === 0)
         const summary = summaries[entry.id]
         const label = entry.label ?? entry.id
-        const mode = entry.mode === 'one-shot' ? '一次性' : '可继续'
-        const activity = entry.activity === 'running' ? '正在运行' : '当前未运行'
+        const mode = entry.mode === 'one-shot' ? t('mode.oneShot') : t('mode.continuable')
+        const activity = entry.activity === 'running' ? t('activity.running') : t('activity.inactive')
         const secondary = [summary?.title, mode, activity]
           .filter(value => value !== undefined)
           .join(' · ')
-        const time = relativeTime(summary?.updatedAt, now)
+        const time = relativeTime(summary?.updatedAt, now, t)
 
         const open = (): void => {
           openChild({ parentSessionId, childSessionId: entry.id, mode: entry.mode })
@@ -235,7 +246,7 @@ function CatalogRows({
                     type="button"
                     tabIndex={-1}
                     className={`${css.disclosure} ${isExpanded ? css.disclosureOpen : ''}`}
-                    aria-label={`${isExpanded ? '收起' : '展开'} ${label} 的下级子代理`}
+                    aria-label={t(isExpanded ? 'branch.collapse' : 'branch.expand', { label })}
                     onClick={toggle}
                   >
                     <IconChevronRightOutline14 />
@@ -262,6 +273,7 @@ function CatalogRows({
                       parentSessionId={entry.id}
                       summaries={summaries}
                       level={level + 1}
+                      t={t}
                     />
                   )
                   : (
@@ -277,6 +289,7 @@ function CatalogRows({
                       refresh={refresh}
                       toggleBranch={toggleBranch}
                       closeCatalog={closeCatalog}
+                      t={t}
                     />
                   )}
               </div>
@@ -294,7 +307,7 @@ function CatalogRows({
  * @returns The action only after a non-empty catalog arrives.
  */
 export function SubagentCatalogAction({
-  sessionId, useSessions, openChild, refresh, setCatalogOpen,
+  sessionId, useSessions, openChild, refresh, setCatalogOpen, t,
 }: SubagentCatalogActionProps) {
   const catalogs = useSessions(state => state.subagentsByParent)
   const summaries = useSessions(state => state.byId)
@@ -419,7 +432,7 @@ export function SubagentCatalogAction({
         className={css.trigger}
         aria-haspopup="tree"
         aria-expanded={open}
-        aria-label={`${descendantCount} 个子代理${descendants.running ? '，正在运行' : ''}`}
+        aria-label={t(descendants.running ? 'count.running' : 'count.total', { count: descendantCount })}
         onClick={() => { changeOpen(!open) }}
         onKeyDown={(event) => {
           if (event.key !== 'ArrowDown') return
@@ -431,11 +444,11 @@ export function SubagentCatalogAction({
         <span className={css.activitySlot}>
           {descendants.running && <StateDot state="ongoing" />}
         </span>
-        <span className={css.count}>{descendantCount} 个子代理</span>
+        <span className={css.count}>{t('count.total', { count: descendantCount })}</span>
         <IconChevronDownOutline14 className={open ? css.triggerOpen : undefined} />
       </button>
       {open && (
-        <div className={css.menu} role="tree" aria-label="子代理会话">
+        <div className={css.menu} role="tree" aria-label={t('tree.aria')}>
           <CatalogRows
             parentSessionId={sessionId}
             catalog={catalog}
@@ -448,6 +461,7 @@ export function SubagentCatalogAction({
             refresh={refresh}
             toggleBranch={toggleBranch}
             closeCatalog={() => { changeOpen(false) }}
+            t={t}
           />
         </div>
       )}

packages/client/ui-subagent/src/client/SubagentReadOnlyComposer.tsx

@@ -1,4 +1,5 @@
-import type { PropsRuntime } from '@deepseek-ai/dsh-client-ui-slots'
+import type { PropsLocale, PropsRuntime } from '@deepseek-ai/dsh-client-ui-slots'
+import { NS } from './locales.ts'
 import css from './SubagentReadOnlyComposer.module.css'
 
 /** Why a catalog-addressed conversation cannot accept human input. */
@@ -8,7 +9,7 @@ export interface SubagentReadOnlyMatch {
 
 /** Full chain props after the read-only subagent selector accepts the owner currency. */
 export type SubagentReadOnlyComposerProps =
-  PropsRuntime<'conversation.composer'> & { matched: SubagentReadOnlyMatch }
+  PropsRuntime<'conversation.composer'> & { matched: SubagentReadOnlyMatch } & PropsLocale<typeof NS>
 
 /**
  * Explain why the normal composer is unavailable for an addressed child.
@@ -16,16 +17,14 @@ export type SubagentReadOnlyComposerProps =
  * @returns A read-only composer replacement.
  */
 export function SubagentReadOnlyComposer({
-  matched,
-}: Pick<SubagentReadOnlyComposerProps, 'matched'>) {
+  matched, t,
+}: Pick<SubagentReadOnlyComposerProps, 'matched' | 't'>) {
   const oneShot = matched.reason === 'one-shot'
   return (
     <div className={css.frame} role="status">
-      <strong>{oneShot ? '一次性子代理记录' : '此子代理暂时只读'}</strong>
+      <strong>{t(oneShot ? 'readonly.oneShot.title' : 'readonly.title')}</strong>
       <span>
-        {oneShot
-          ? '一次性任务不支持后续消息，可在这里查看完整执行记录。'
-          : '父会话当前不在线，重新打开父会话后即可继续发送消息。'}
+        {t(oneShot ? 'readonly.oneShot.body' : 'readonly.body')}
       </span>
     </div>
   )

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

@@ -18,6 +18,15 @@ import { SubagentCatalogAction, type SubagentCatalogInjected } from './SubagentC
 import {
   SubagentReadOnlyComposer, type SubagentReadOnlyMatch,
 } from './SubagentReadOnlyComposer.tsx'
+import type {} from '@deepseek-ai/dsh-client-locale/client'
+import { en, NS, zh, type SubagentKey } from './locales.ts'
+
+declare module '@deepseek-ai/dsh-client-ui-slots' {
+  interface LocaleNamespaceMap {
+    /** Subagent catalog and read-only composer copy. */
+    'subagent': SubagentKey
+  }
+}
 
 export type {
   SubagentCatalogActionProps, SubagentCatalogInjected,
@@ -27,7 +36,7 @@ export type {
 } from './SubagentReadOnlyComposer.tsx'
 
 /** Required services for references, conversation slots, and session navigation. */
-export const inject = ['slash', 'sessions', 'conversation', 'slots']
+export const inject = ['slash', 'sessions', 'conversation', 'slots', 'locale']
 
 /** Claim the composer for one-shot history or an unavailable continuation owner. */
 function selectReadOnlySubagent(owner: ComposerChainProps): SubagentReadOnlyMatch | null {
@@ -42,6 +51,7 @@ function selectReadOnlySubagent(owner: ComposerChainProps): SubagentReadOnlyMatc
  * @param ctx - client root context.
  */
 export function apply(ctx: ClientContext): void {
+  ctx.effect(() => ctx.locale.register(NS, { zh, en }), 'ui-subagent: dictionaries')
   const sessions = ctx.sessions
   // Child labels live on the session list (parentId lineage + displayTitle),
   // not the conversation snapshot — the list store is the zero-RPC candidate feed.
@@ -98,6 +108,7 @@ export function apply(ctx: ClientContext): void {
       name: 'conversation.session.header.actions',
       id: 'subagent-catalog',
       order: 10,
+      locale: NS,
       inject: catalogActions,
     }, SubagentCatalogAction),
     'ui-subagent: lazy descendant catalog action',
@@ -106,6 +117,7 @@ export function apply(ctx: ClientContext): void {
     () => ctx.slots.register({
       name: 'conversation.composer',
       priority: -10,
+      locale: NS,
       select: selectReadOnlySubagent,
     }, SubagentReadOnlyComposer),
     'ui-subagent: read-only addressed composer',

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

@@ -0,0 +1,67 @@
+/** `subagent` namespace dictionaries. */
+
+/** Dictionary namespace owned by this plugin. */
+export const NS = 'subagent'
+
+/** Simplified Chinese dictionary (the key-set source of truth). */
+export const zh = {
+  'diagnostic.corrupt': '会话记录损坏',
+  'diagnostic.unsupported': '子代理记录版本不受支持',
+  'diagnostic.unavailable': '会话记录暂不可用',
+  'time.justNow': '刚刚',
+  'time.minutes': '{n}分钟',
+  'time.hours': '{n}小时',
+  'time.days': '{n}天',
+  'time.months': '{n}个月',
+  'time.years': '{n}年',
+  'loading.label': '正在加载子代理…',
+  'loading.aria': '正在加载子代理',
+  'load.error': '无法加载子代理',
+  'retry': '重试',
+  'mode.oneShot': '一次性',
+  'mode.continuable': '可继续',
+  'activity.running': '正在运行',
+  'activity.inactive': '当前未运行',
+  'branch.collapse': '收起 {label} 的下级子代理',
+  'branch.expand': '展开 {label} 的下级子代理',
+  'count.total': '{count} 个子代理',
+  'count.running': '{count} 个子代理，正在运行',
+  'tree.aria': '子代理会话',
+  'readonly.oneShot.title': '一次性子代理记录',
+  'readonly.title': '此子代理暂时只读',
+  'readonly.oneShot.body': '一次性任务不支持后续消息，可在这里查看完整执行记录。',
+  'readonly.body': '父会话当前不在线，重新打开父会话后即可继续发送消息。',
+} as const
+
+/** English dictionary, key-identical to the Chinese source of truth. */
+export const en: Record<SubagentKey, string> = {
+  'diagnostic.corrupt': 'corrupted session record',
+  'diagnostic.unsupported': 'unsupported subagent record version',
+  'diagnostic.unavailable': 'session record temporarily unavailable',
+  'time.justNow': 'just now',
+  'time.minutes': '{n}m',
+  'time.hours': '{n}h',
+  'time.days': '{n}d',
+  'time.months': '{n}mo',
+  'time.years': '{n}y',
+  'loading.label': 'Loading subagents…',
+  'loading.aria': 'Loading subagents',
+  'load.error': 'Unable to load subagents',
+  'retry': 'Retry',
+  'mode.oneShot': 'one-shot',
+  'mode.continuable': 'continuable',
+  'activity.running': 'running',
+  'activity.inactive': 'not running',
+  'branch.collapse': 'Collapse {label} descendants',
+  'branch.expand': 'Expand {label} descendants',
+  'count.total': '{count} subagents',
+  'count.running': '{count} subagents running',
+  'tree.aria': 'Subagent sessions',
+  'readonly.oneShot.title': 'One-shot subagent record',
+  'readonly.title': 'This subagent is read-only for now',
+  'readonly.oneShot.body': 'One-shot tasks do not accept follow-ups; review the full execution record here.',
+  'readonly.body': 'The parent session is offline; reopen it to continue sending messages.',
+}
+
+/** Key domain of the `subagent` namespace (zh is the source of truth). */
+export type SubagentKey = keyof typeof zh

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

@@ -18,6 +18,7 @@ import {
 import type { ComposerChainProps } from '@deepseek-ai/dsh-client-ui-conversation/client'
 import { SlashService } from '@deepseek-ai/dsh-client-ui-slash/client'
 import type { ClientSessionContext, SlashSource } from '@deepseek-ai/dsh-client-ui-slash/client'
+import { apply as applyLocale } from '@deepseek-ai/dsh-client-locale/client'
 import {
   SubagentCatalogAction, type SubagentCatalogInjected,
 } from '../src/client/SubagentCatalogAction.tsx'
@@ -85,6 +86,7 @@ async function fullBench(sessions: SessionSummary[]) {
   ctx.provide('slash', { registerSource: (src: SlashSource) => { captured = src; return () => {} } })
   ctx.provide('sessions', face)
   await provideSlotFaces(ctx)
+  await ctx.plugin({ inject: ['slots'], apply: applyLocale }).await()
   await ctx.plugin({ inject: [...inject], apply }).await()
   return { source: captured!, face, ctx }
 }
@@ -111,7 +113,7 @@ const req = (query: string) =>
 
 describe('apply', () => {
   it('declares the services it binds', () => {
-    expect(inject).toEqual(['slash', 'sessions', 'conversation', 'slots'])
+    expect(inject).toEqual(['slash', 'sessions', 'conversation', 'slots', 'locale'])
   })
 
   it('registers the "@" subagent source; disposal frees the name (HMR safety)', async () => {
@@ -119,6 +121,7 @@ describe('apply', () => {
     await ctx.plugin(SlashService).await()
     ctx.provide('sessions', sessionsWith(FAMILY))
     await provideSlotFaces(ctx)
+    await ctx.plugin({ inject: ['slots'], apply: applyLocale }).await()
     const fiber = ctx.plugin({ inject: [...inject], apply })
     await fiber.await()
     const slash = ctx.get('slash') as SlashService

packages/client/ui-subagent/tests/conversation-ui.spec.tsx

@@ -7,7 +7,10 @@ import type {
 import {
   SubagentCatalogAction, type SubagentCatalogActionProps,
 } from '../src/client/SubagentCatalogAction.tsx'
-import { SubagentReadOnlyComposer } from '../src/client/SubagentReadOnlyComposer.tsx'
+import {
+  SubagentReadOnlyComposer, type SubagentReadOnlyComposerProps,
+} from '../src/client/SubagentReadOnlyComposer.tsx'
+import { zh, type SubagentKey } from '../src/client/locales.ts'
 
 afterEach(() => {
   cleanup()
@@ -63,12 +66,22 @@ function props(
   function useSessions<T>(select: (snapshot: SessionListState) => T): T {
     return select(state)
   }
+  // The zh dictionary is the source of truth for this spec's assertions:
+  // the stub interpolates `{name}` params like the locale service does.
+  const t = ((key: SubagentKey, params?: Record<string, unknown>): string => {
+    let text = zh[key]
+    for (const [name, value] of Object.entries(params ?? {})) {
+      text = text.replaceAll(`{${name}}`, String(value))
+    }
+    return text
+  }) as SubagentCatalogActionProps['t']
   return {
     sessionId: PARENT,
     useSessions,
     openChild: vi.fn(),
     refresh: vi.fn(),
     setCatalogOpen: vi.fn(),
+    t,
   } as unknown as SubagentCatalogActionProps
 }
 
@@ -453,13 +466,16 @@ describe('SubagentCatalogAction', () => {
 })
 
 describe('SubagentReadOnlyComposer', () => {
+  // The zh dictionary is the source of truth for this spec's assertions.
+  const t = ((key: SubagentKey): string => zh[key]) as SubagentReadOnlyComposerProps['t']
+
   it('explains the exact missing-parent recovery path', () => {
-    render(<SubagentReadOnlyComposer matched={{ reason: 'parent-unavailable' }} />)
+    render(<SubagentReadOnlyComposer matched={{ reason: 'parent-unavailable' }} t={t} />)
     expect(screen.getByRole('status').textContent).toContain('父会话当前不在线')
   })
 
   it('explains that one-shot histories never accept follow-ups', () => {
-    render(<SubagentReadOnlyComposer matched={{ reason: 'one-shot' }} />)
+    render(<SubagentReadOnlyComposer matched={{ reason: 'one-shot' }} t={t} />)
     expect(screen.getByRole('status').textContent).toContain('一次性任务不支持后续消息')
   })
 })