fix(ui-chat): show a stopped notice for turns interrupted by a DSH stop

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

@@ -53,6 +53,7 @@ function failureMessage(
   t: ChatViewSlotProps['t'],
 ): string {
   if (code === 'ACCOUNT_SIGNED_OUT') return t('message.failure.accountSignedOut')
+  if (code === 'INTERRUPTED') return t('message.failure.interrupted')
   if (code === 'ACCOUNT_SIGN_IN_REQUIRED') return t('message.failure.accountSignInRequired')
   if (code === 'QUOTA' || code === 'ACCOUNT_QUOTA') return t('message.failure.quota')
   return code === 'AUTH' ? t('message.failure.auth') : message
@@ -135,7 +136,7 @@ function TurnErrorItem({ node, t }: {
     <div className={css.turnErrorRow} role="status">
       <StateDot state="error" className={css.turnErrorDot} />
       <div className={css.turnErrorCopy}>
-        <span className={css.turnErrorTitle}>{node.code === 'ACCOUNT_SIGNED_OUT' ? t('message.accountStopped') : t('message.turnError')}</span>
+        <span className={css.turnErrorTitle}>{node.code === 'ACCOUNT_SIGNED_OUT' || node.code === 'INTERRUPTED' ? t('message.taskStopped') : t('message.turnError')}</span>
         <span className={css.turnErrorMessage}>{failureMessage(node.message, node.code, t)}</span>
       </div>
       {node.code !== undefined && <code className={css.turnErrorCode}>{node.code}</code>}

packages/client/ui-chat/src/client/conversation-nodes/turn-error.ts

@@ -2,6 +2,7 @@ import type { Context } from '@deepseek-ai/cordis'
 import type {
   ConversationMatch, ConversationNodeContext, ConversationNodeDefinition, TurnErrorNode,
 } from '@deepseek-ai/dsh-client-ui-conversation/client'
+import type { TurnEndReason } from '@deepseek-ai/dsh-session/types'
 import { chatNode } from './common.ts'
 import { displayFailure } from './event-projection.ts'
 
@@ -28,13 +29,30 @@ function lastStep(context: ConversationNodeContext<TurnErrorState>): number {
   return location.turn.steps.at(-1)?.step ?? 0
 }
 
+/**
+ * Failure shown for a turn ending: a recorded error, a sign-out cancellation,
+ * or a turn closed after DSH stopped running mid-turn.
+ */
+function endFailure(reason: TurnEndReason): { readonly message: string; readonly code?: string } | undefined {
+  switch (reason.kind) {
+    case 'error':
+      return reason.error
+    case 'aborted':
+      return reason.reason.kind === 'hook' && reason.reason.reason === 'deepseek-account/signed-out'
+        ? { message: 'Stopped because you signed out of DeepSeek.', code: 'ACCOUNT_SIGNED_OUT' }
+        : undefined
+    case 'interrupted':
+      return { message: 'DSH stopped running before this turn finished.', code: 'INTERRUPTED' }
+    default:
+      // Completed, blocked, max-tokens, forked, user/parent cancellation, and
+      // plugin-merged endings have no failure row.
+      return undefined
+  }
+}
+
 function failureFrom(match: ConversationMatch): TurnErrorState['failure'] | undefined {
   if (match.event.type !== 'turn/end') return undefined
-  const reason = match.event.data.reason
-  const failure = reason.kind === 'error' ? reason.error
-    : reason.kind === 'aborted' && reason.reason.kind === 'hook'
-      && reason.reason.reason === 'deepseek-account/signed-out'
-      ? { message: 'Stopped because you signed out of DeepSeek.', code: 'ACCOUNT_SIGNED_OUT' } : undefined
+  const failure = endFailure(match.event.data.reason)
   if (failure === undefined) return undefined
   const display = displayFailure(failure)
   return {
@@ -63,9 +81,7 @@ export const turnErrorDefinition: ConversationNodeDefinition<TurnErrorState> = {
   target: 'chat',
   match: (event) => {
     if (event.type === 'turn/start') return { id: String(event.data.turn), role: 'start' }
-    if (event.type === 'turn/end' && (event.data.reason.kind === 'error'
-      || (event.data.reason.kind === 'aborted' && event.data.reason.reason.kind === 'hook'
-        && event.data.reason.reason.reason === 'deepseek-account/signed-out'))) {
+    if (event.type === 'turn/end' && endFailure(event.data.reason) !== undefined) {
       return { id: String(event.data.turn), role: 'update' }
     }
     return null

packages/client/ui-chat/src/client/locale.ts

@@ -161,8 +161,9 @@ export const zh = {
   'message.retry.delay': '重试延迟：',
   'message.retry.failure': '失败原因：',
   'message.failure.auth': 'API 密钥无效',
-  'message.accountStopped': '任务已停止',
+  'message.taskStopped': '任务已停止',
   'message.failure.accountSignedOut': '任务已因退出 DeepSeek 登录而停止。',
+  'message.failure.interrupted': 'DSH 在本轮完成前停止运行，未完成的工具调用结果未知。',
   'message.failure.accountSignInRequired': '请先登录 DeepSeek，并确认请求地址支持账号认证。',
   'message.failure.quota': '当前请求的额度已用尽',
   'message.turnError': '本轮运行失败',
@@ -354,8 +355,9 @@ export const en = {
   'message.retry.delay': 'Retry delay: ',
   'message.retry.failure': 'Failure reason: ',
   'message.failure.auth': 'API key is invalid',
-  'message.accountStopped': 'Task stopped',
+  'message.taskStopped': 'Task stopped',
   'message.failure.accountSignedOut': 'Stopped because you signed out of DeepSeek.',
+  'message.failure.interrupted': 'DSH stopped running before this turn finished. Unfinished tool calls have unknown outcomes.',
   'message.failure.accountSignInRequired': 'Sign in to DeepSeek and ensure the request destination supports account authentication.',
   'message.failure.quota': 'Request quota exhausted.',
   'message.turnError': 'This turn failed',

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

@@ -2128,6 +2128,7 @@ describe('ChatView', () => {
   it('renders every terminal failure inline with neutral quota copy and no transient notice', () => {
     const h = makeHarness({ nodes: [
       user(1, 'try'), turnError(2, 'AUTH'), turnError(3), turnError(4, 'QUOTA'), turnError(5, 'ACCOUNT_QUOTA'),
+      turnError(6, 'INTERRUPTED'),
     ] })
     const view = render(<h.ChatView {...h.props} />)
     const statuses = view.getAllByRole('status')
@@ -2136,6 +2137,7 @@ describe('ChatView', () => {
       '本轮运行失败plugin exploded',
       '本轮运行失败当前请求的额度已用尽QUOTA',
       '本轮运行失败当前请求的额度已用尽ACCOUNT_QUOTA',
+      '任务已停止DSH 在本轮完成前停止运行，未完成的工具调用结果未知。INTERRUPTED',
     ])
     // The transient notice is the frame-wide host's job; the failure row keeps
     // neither a recharge affordance nor a toast of its own.

packages/client/ui-chat/tests/conversation-node-definitions.client.spec.ts

@@ -2800,3 +2800,19 @@ it('retains a sign-out cancellation notice when reopening a partial turn', () =>
     code: 'ACCOUNT_SIGNED_OUT', message: 'Stopped because you signed out of DeepSeek.',
   })
 })
+
+it('reports a turn closed after its process exited as a stopped turn', () => {
+  const value = assembler([
+    at(7, 'turn/end', { turn: 1, reason: { kind: 'interrupted' } }),
+  ], true)
+  expect(node(snapshot(value), 'turn-error')?.data).toMatchObject({
+    code: 'INTERRUPTED', message: 'DSH stopped running before this turn finished.',
+  })
+})
+
+it('keeps user cancellations and forked endings free of a failure row', () => {
+  for (const reason of [{ kind: 'aborted', reason: { kind: 'user' } }, { kind: 'forked' }] as const) {
+    const value = assembler([at(7, 'turn/end', { turn: 1, reason })], true)
+    expect(node(snapshot(value), 'turn-error')).toBeUndefined()
+  }
+})