fix(web): address steering review feedback

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

@@ -222,7 +222,8 @@ export function apply(ctx: Context): void {
       if (sessionId === undefined) {
         return {
           keyboard: undefined,
-          resolveSubmitMode: (running, gesture) => submissionPolicy.resolve(running, gesture),
+          resolveSubmitMode: (running, gesture, steeringAvailable) =>
+            submissionPolicy.resolve(running, gesture, steeringAvailable),
           toggleCommandMenu: undefined,
           stop: undefined,
           command: undefined,
@@ -233,7 +234,8 @@ export function apply(ctx: Context): void {
       const slash = inputHub.slash(sessionId)
       return {
         keyboard: shell,
-        resolveSubmitMode: (running, gesture) => submissionPolicy.resolve(running, gesture),
+        resolveSubmitMode: (running, gesture, steeringAvailable) =>
+          submissionPolicy.resolve(running, gesture, steeringAvailable),
         toggleCommandMenu: slash === undefined
           ? undefined
           : (selection) => {

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

@@ -249,10 +249,10 @@ export function ChatView({
   const selectedCallId = useStore(s => s.selection?.callId)
 
   const items = useMemo(() => deriveChatFlow(nodes), [nodes])
-  const pendingSteering = useMemo(() => {
-    const durable = new Set(nodes.flatMap(node => node.kind === 'steering' ? [node.messageId] : []))
-    return inbox.filter(item => item.placement === 'steering' && !durable.has(item.messageId))
-  }, [inbox, nodes])
+  const pendingSteering = useMemo(
+    () => inbox.filter(item => item.placement === 'steering'),
+    [inbox],
+  )
   const activeRetry = useMemo(() => activeRetrySeq(nodes, running), [nodes, running])
   // Only the last content assistant of each turn owns IconActions; mid-turn
   // text (before tools) omits `time` so AssistantMarkdown stays chrome-free.

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

@@ -287,7 +287,11 @@ export interface ComposerBarInjected {
   /** The InputBar-exclusive keyboard/DOM command face (decision 20 private plane); absent with the session. */
   keyboard: ComposerKeyboard | undefined
   /** Resolve one keyboard submission gesture against the current running state and persisted preference. */
-  resolveSubmitMode: (running: boolean, gesture: ComposerSubmitGesture) => InputSubmitMode
+  resolveSubmitMode: (
+    running: boolean,
+    gesture: ComposerSubmitGesture,
+    steeringAvailable: boolean,
+  ) => InputSubmitMode
   /** Toggle the shared slash menu with only its command source; absent without ui-slash or a session. */
   toggleCommandMenu: ((selection: EditSelection) => void) | undefined
   /** Cancel the in-flight turn; absent with the session. */

packages/client/ui-conversation/src/client/input/submission-policy.ts

@@ -27,10 +27,15 @@ export class ComposerSubmissionPolicy {
    * Resolve one keyboard gesture without changing state.
    * @param running - whether the addressed agent currently reports busy.
    * @param gesture - plain Enter or the Cmd/Ctrl-accelerated chord.
-   * @returns Queue outside busy state; otherwise the preferred mode or its opposite.
+   * @param steeringAvailable - whether this session transport supports steering.
+   * @returns Queue outside steer-capable busy state; otherwise the preferred mode or its opposite.
    */
-  resolve(running: boolean, gesture: ComposerSubmitGesture): InputSubmitMode {
-    if (!running) return 'queue'
+  resolve(
+    running: boolean,
+    gesture: ComposerSubmitGesture,
+    steeringAvailable: boolean,
+  ): InputSubmitMode {
+    if (!running || !steeringAvailable) return 'queue'
     const preferred = this.busyEnter.getSnapshot()
     if (gesture === 'enter') return preferred
     return preferred === 'queue' ? 'steer' : 'queue'

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

@@ -97,7 +97,7 @@ export const zh = {
   'queue.steer.unavailable': '仅运行中可插话发送',
   '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。',
-  'queue.steerFailed': '插话失败：当前回复已结束，或这条消息已经开始发送。',
+  'queue.steerFailed': '插话发送失败，请重试。',
   'terminal.signal': '信号 {signal}',
   'terminal.exitCode': '退出码 {code}',
   'terminal.running': '运行中',
@@ -204,7 +204,7 @@ export const en = {
   'queue.steer.unavailable': 'Steering is available only while the agent is running',
   'queue.editFailed': 'Edit failed: this message may have already started sending.',
   'queue.removeFailed': 'Removal failed: this message may have already started sending.',
-  'queue.steerFailed': 'Steering failed: the current response ended or this message already started sending.',
+  'queue.steerFailed': 'Steering failed. Try again.',
   'terminal.signal': 'signal {signal}',
   'terminal.exitCode': 'exit code {code}',
   'terminal.running': 'Running',

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

@@ -32,6 +32,7 @@ export function QueueDock({ useSession, updateQueue, notify, t }: QueueDockProps
   const inbox = useSession(s => s.queue)
   const queue = useMemo(() => inbox.filter(row => row.placement === 'queued'), [inbox])
   const running = useSession(s => s.running)
+  const queueMutable = useSession(s => s.subagent === null)
   const [editing, setEditing] = useState<{ id: QueueItemId; text: string } | null>(null)
   const [busy, setBusy] = useState<QueueItemId | null>(null)
   const [collapsed, setCollapsed] = useState(true)
@@ -39,12 +40,12 @@ export function QueueDock({ useSession, updateQueue, notify, t }: QueueDockProps
 
   useEffect(() => {
     if (queue.length === 0 && !collapsed) setCollapsed(true)
-    if (editing !== null && !queue.some(row => row.id === editing.id)) setEditing(null)
-  }, [collapsed, editing, queue])
+    if (editing !== null && (!queueMutable || !queue.some(row => row.id === editing.id))) setEditing(null)
+  }, [collapsed, editing, queue, queueMutable])
 
   if (queue.length === 0) return null
 
-  const interactionActive = editing !== null || busy !== null
+  const interactionActive = queueMutable && (editing !== null || busy !== null)
   const expanded = !collapsed || interactionActive
   const listVisible = queue.length === 1 || expanded
 
@@ -116,7 +117,7 @@ export function QueueDock({ useSession, updateQueue, notify, t }: QueueDockProps
                   />
                 )
                 : <span className={css.preview}>{row.preview}</span>}
-              <div className={css.actions}>
+              {queueMutable && <div className={css.actions}>
                 {editing?.id === row.id
                   ? (
                     <>
@@ -190,7 +191,7 @@ export function QueueDock({ useSession, updateQueue, notify, t }: QueueDockProps
                       </button>
                     </>
                   )}
-              </div>
+              </div>}
             </li>
           ))}
         </ul>

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

@@ -34,7 +34,7 @@ export interface IConversation {
    * Apply one edit, remove, or strict steer operation to a pending queue occurrence.
    * @param itemId - agent-owned inbox occurrence identity.
    * @param action - requested queue operation.
-   * @returns completion; business failures reject.
+   * @returns completion; converged strict-steer races resolve, while other failures reject.
    */
   updateQueue(itemId: QueueItemId, action: QueueAction): Promise<void>
   /**
@@ -82,6 +82,10 @@ export class ConversationService extends Service implements IConversation {
     const session = this.scopedSession('updateQueue')
     const result = await session.updateQueue(itemId, action)
     if (!result.ok) {
+      if (
+        action.kind === 'steer'
+        && (result.error.code === 'steer-unavailable' || result.error.code === 'queue-item-not-found')
+      ) return
       throw new Error(`conversation.updateQueue failed: ${result.error.code}: ${result.error.message}`)
     }
   }

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

@@ -181,7 +181,11 @@ export function InputBar({
     e.preventDefault()
     if (e.repeat) return // held-down Enter must not machine-gun sends
     if (locked || machineBusy) return
-    keyboard.submit(resolveSubmitMode(running, e.ctrlKey || e.metaKey ? 'accelerated' : 'enter'))
+    keyboard.submit(resolveSubmitMode(
+      running,
+      e.ctrlKey || e.metaKey ? 'accelerated' : 'enter',
+      subagent === null,
+    ))
   }
 
   const onChange = (e: ChangeEvent<HTMLTextAreaElement>): void => {