diff --git a/packages/ui/desktop/src/app.ts b/packages/ui/desktop/src/app.ts
index 4b05e2c994..c74acd94c3 100644
--- a/packages/ui/desktop/src/app.ts
+++ b/packages/ui/desktop/src/app.ts
@@ -81,6 +81,22 @@ interface LiveTurn {
   errorText?: string
 }
 
+interface InteractionOption {
+  readonly optionId: string
+  readonly name: string
+  readonly kind: string
+}
+
+/** A permission or elicitation request forwarded from the ACP client in main. */
+interface InteractionRequest {
+  readonly id: string
+  readonly kind: 'permission' | 'elicitation'
+  readonly sessionId?: string
+  readonly title: string
+  readonly detail: unknown
+  readonly options: readonly InteractionOption[]
+}
+
 interface PlanItem {
   readonly content: string
   readonly status: string
@@ -170,6 +186,9 @@ const state = {
   traceLoadRevision: 0,
   liveTurnCounter: 0,
   liveToolMeta: new Map<string, LiveToolMeta>(),
+  interactions: [] as InteractionRequest[],
+  queues: new Map<string, string[]>(),
+  pausedQueues: new Set<string>(),
   traceCatchupTimer: undefined as number | undefined,
   traceCatchupAttempts: 0,
 }
@@ -201,6 +220,9 @@ interface ShellRefs {
   waterfall: HTMLElement
   devCanvas: HTMLElement
   sessionCanvas: HTMLElement
+  interactionDock: HTMLElement
+  queueDock: HTMLElement
+  planDock: HTMLElement
   composerForm: HTMLFormElement
   composerInput: HTMLTextAreaElement
   composerHint: HTMLElement
@@ -287,6 +309,9 @@ function buildShell(): void {
           </section>
         </section>
         <section class="module-canvas develop-canvas" id="devCanvas" hidden></section>
+        <div class="composer-dock" id="interactionDock" hidden></div>
+        <div class="composer-dock" id="queueDock" hidden></div>
+        <div class="composer-dock" id="planDock" hidden></div>
         <form class="composer" id="composerForm">
           <textarea id="composerInput" name="prompt" rows="1"></textarea>
           <div class="composer-meta">
@@ -337,6 +362,9 @@ function buildShell(): void {
     waterfall: pick('waterfall'),
     devCanvas: pick('devCanvas'),
     sessionCanvas: pick('sessionCanvas'),
+    interactionDock: pick('interactionDock'),
+    queueDock: pick('queueDock'),
+    planDock: pick('planDock'),
     composerForm: pick('composerForm') as HTMLFormElement,
     composerInput: pick('composerInput') as HTMLTextAreaElement,
     composerHint: pick('composerHint'),
@@ -415,6 +443,11 @@ async function boot(): Promise<void> {
   window.dshDesktop.sessions.onUpdate((payload) => {
     handleSessionUpdate(asSessionUpdate(payload))
   })
+  if (typeof window.dshDesktop.interaction?.onRequest === 'function') {
+    window.dshDesktop.interaction.onRequest((payload) => {
+      handleInteractionRequest(payload)
+    })
+  }
   await Promise.all([refreshRuntime(), refreshDevStatus()])
   await refreshSessions()
 }
@@ -501,6 +534,8 @@ function applyTrace(trace: TracePayload, resetExpansion: boolean): void {
   renderTrajTree()
   renderWaterfall()
   renderInspector()
+  renderPlanDock()
+  renderQueueDock()
   scrollChatToBottom(resetExpansion)
   scheduleTraceCatchup(sessionId)
 }
@@ -636,11 +671,7 @@ function renderLiveTurn(): void {
     if (body !== null) body.textContent = tool.detail
     row.classList.toggle('failed', tool.status === 'failed')
   }
-  const planHost = el.liveTurn.querySelector<HTMLElement>('[data-live="plan"]')
-  if (planHost !== null) {
-    planHost.hidden = live.plan === undefined || live.plan.length === 0
-    planHost.innerHTML = live.plan === undefined ? '' : renderPlanList(live.plan)
-  }
+  renderPlanDock()
   const answer = el.liveTurn.querySelector<HTMLElement>('[data-live="answer"]')
   if (answer !== null) {
     answer.hidden = live.answer.length === 0
@@ -670,13 +701,12 @@ function ensureLiveSkeleton(live: LiveTurn): void {
     el.liveTurn.innerHTML = `
       ${live.userText === undefined ? '' : `
         <article class="message user">
-          <div class="message-card"><div class="user-bubble">${escapeHtml(live.userText)}</div></div>
+          <div class="message-card"><div class="user-bubble">${escapeHtml(live.userText.trim())}</div></div>
         </article>
       `}
       <article class="message assistant live" data-live-key="${live.key}">
         <div class="avatar">A</div>
         <div class="message-card">
-          <div class="plan-host" data-live="plan" hidden></div>
           <div class="activity-list">
             <details class="chat-activity thinking" data-live="thinking" hidden>
               <summary><span>${escapeHtml(t('chat.thinking'))}</span><strong></strong></summary>
@@ -734,9 +764,9 @@ function updateLiveJump(): void {
 
 function updateComposerState(): void {
   const busy = state.busySessionId !== undefined
-  el.sendButton.disabled = busy || !hasDesktopApi() || el.composerInput.value.trim().length === 0
+  el.sendButton.disabled = !hasDesktopApi() || el.composerInput.value.trim().length === 0
   el.cancelButton.hidden = !busy
-  el.composerHint.textContent = busy ? t('chat.working') : t('composer.hint')
+  el.composerHint.textContent = busy ? t('queue.hintBusy') : t('composer.hint')
   el.composerForm.classList.toggle('busy', busy)
   el.composerForm.setAttribute('aria-busy', String(busy))
 }
@@ -772,6 +802,12 @@ async function sendPrompt(prompt: string): Promise<void> {
       const live = state.live.get(DRAFT_SESSION_ID)
       state.live.delete(DRAFT_SESSION_ID)
       if (live !== undefined) state.live.set(sessionId, live)
+      const draftQueue = state.queues.get(DRAFT_SESSION_ID)
+      if (draftQueue !== undefined) {
+        state.queues.set(sessionId, draftQueue)
+        state.queues.delete(DRAFT_SESSION_ID)
+      }
+      if (state.pausedQueues.delete(DRAFT_SESSION_ID)) state.pausedQueues.add(sessionId)
       state.selectedSessionId = sessionId
       state.draftChat = false
       state.busySessionId = sessionId
@@ -794,8 +830,11 @@ async function sendPrompt(prompt: string): Promise<void> {
       await loadTrace(sessionId)
     }
     else state.live.delete(sessionId)
+    maybeSendNextQueued(sessionId)
   } catch (error) {
     state.busySessionId = undefined
+    state.pausedQueues.add(sessionId ?? DRAFT_SESSION_ID)
+    renderQueueDock()
     const live = sessionId === undefined ? state.live.get(DRAFT_SESSION_ID) : state.live.get(sessionId)
     if (live !== undefined) {
       live.status = 'error'
@@ -832,6 +871,8 @@ async function cancelActiveTurn(): Promise<void> {
   const sessionId = state.busySessionId
   if (sessionId === undefined || sessionId === DRAFT_SESSION_ID || !hasDesktopApi()) return
   try {
+    state.pausedQueues.add(sessionId)
+    renderQueueDock()
     await window.dshDesktop.sessions.cancel(sessionId)
     toast(t('chat.cancelRequested'))
   } catch (error) {
@@ -915,6 +956,8 @@ function showModule(module: AppModule): void {
   el.sessionCanvas.hidden = module !== 'sessions'
   el.devCanvas.hidden = module !== 'develop'
   el.composerForm.hidden = module !== 'sessions'
+  renderPlanDock()
+  renderQueueDock()
   if (module === 'develop') renderDevelop()
   renderTopbar()
 }
@@ -950,25 +993,28 @@ function renderConversationTurn(turn: ChatTurn): string {
   const userTarget = turn.userTargetId === undefined ? undefined : state.graph.targets.get(turn.userTargetId)
   const user = userTarget === undefined ? '' : `
     <article class="message user ${selectedTargetClass(userTarget.id)}" role="button" tabindex="0" data-target-id="${escapeHtml(userTarget.id)}">
-      <div class="message-card"><div class="user-bubble">${escapeHtml(contentText(userTarget.output))}</div></div>
+      <div class="message-card"><div class="user-bubble">${escapeHtml(contentText(userTarget.output).trim())}</div></div>
     </article>
   `
-  if (turn.activities.length === 0) return user
+  const turnTarget = state.graph.targets.get(`turn:${turn.turn}`)
+  const reason = String(asRecord(asRecord(turnTarget?.metadata).data ?? turnTarget?.output).kind ?? asRecord(turnTarget?.output).kind ?? '')
+  const errorLine = turnTarget?.status === 'error'
+    ? `<div class="turn-error" role="alert">${escapeHtml(t('chat.turnFailed'))}${reason.length > 0 ? ` · ${escapeHtml(reason)}` : ''}</div>`
+    : ''
+  if (turn.activities.length === 0) return `${user}${errorLine}`
   return `${user}
     <article class="message assistant">
       <div class="avatar">A</div>
       <div class="message-card"><div class="activity-list">${turn.activities.map(renderConversationActivity).join('')}</div></div>
     </article>
-  `
+  ${errorLine}`
 }
 
 function renderConversationActivity(activity: ChatActivity): string {
   const target = state.graph.targets.get(activity.targetId)
   if (target === undefined) return ''
   if (activity.kind === 'tool') return renderChatToolActivity(target)
-  if (activity.kind === 'plan') {
-    return `<section class="plan-activity ${selectedTargetClass(target.id)}" data-target-id="${escapeHtml(target.id)}">${renderPlanList(planItemsOf(target))}</section>`
-  }
+  if (activity.kind === 'plan') return ''
   if (activity.kind === 'text') {
     return `<section class="assistant-prose assistant-segment ${selectedTargetClass(target.id)}" data-target-id="${escapeHtml(target.id)}">${renderMarkdown(assistantText(target.output) || contentText(target.output))}</section>`
   }
@@ -998,6 +1044,117 @@ function renderPlanList(items: readonly PlanItem[]): string {
   `
 }
 
+function handleInteractionRequest(payload: unknown): void {
+  const record = asRecord(payload)
+  const id = String(record.id ?? '')
+  if (id.length === 0 || state.interactions.some(item => item.id === id)) return
+  state.interactions.push({
+    id,
+    kind: record.kind === 'elicitation' ? 'elicitation' : 'permission',
+    ...(record.sessionId === undefined ? {} : { sessionId: String(record.sessionId) }),
+    title: String(record.title ?? ''),
+    detail: record.detail,
+    options: (Array.isArray(record.options) ? record.options : []).map(option => ({
+      optionId: String(asRecord(option).optionId ?? ''),
+      name: String(asRecord(option).name ?? asRecord(option).optionId ?? ''),
+      kind: String(asRecord(option).kind ?? ''),
+    })),
+  })
+  renderInteractionDock()
+}
+
+async function respondInteraction(id: string, response: unknown): Promise<void> {
+  // Only answer requests this instance owns: guards double-clicks and replays.
+  if (!state.interactions.some(item => item.id === id)) return
+  state.interactions = state.interactions.filter(item => item.id !== id)
+  renderInteractionDock()
+  try {
+    await window.dshDesktop.interaction.respond(id, response)
+  } catch (error) {
+    showError(String(error))
+  }
+}
+
+/** Permission and question cards block the runtime: they always render. */
+function renderInteractionDock(): void {
+  el.interactionDock.hidden = state.interactions.length === 0
+  el.interactionDock.innerHTML = state.interactions.map(request => `
+    <section class="interaction-card ${request.kind}" role="alertdialog" aria-label="${escapeHtml(interactionTitle(request))}">
+      <header>
+        <strong>${escapeHtml(interactionTitle(request))}</strong>
+        <span>${escapeHtml(truncate(request.title, 120))}</span>
+      </header>
+      ${request.detail === undefined ? '' : `<details class="metadata-line"><summary>${escapeHtml(t('chat.details'))}</summary><pre>${escapeHtml(truncate(formatPayload(request.detail, 'json'), 2000))}</pre></details>`}
+      <div class="interaction-actions">
+        ${request.kind === 'elicitation' ? `<button type="button" class="allow" data-respond-accept="${escapeHtml(request.id)}">${escapeHtml(t('interaction.accept'))}</button>` : ''}
+        ${request.options.map(option => `<button type="button" class="${option.kind.startsWith('allow') ? 'allow' : 'reject'}" data-respond-option="${escapeHtml(option.optionId)}" data-respond-id="${escapeHtml(request.id)}">${escapeHtml(option.name)}</button>`).join('')}
+        <button type="button" data-respond-cancel="${escapeHtml(request.id)}">${escapeHtml(t('interaction.dismiss'))}</button>
+      </div>
+    </section>
+  `).join('')
+}
+
+function interactionTitle(request: InteractionRequest): string {
+  return request.kind === 'permission' ? t('interaction.permissionTitle') : t('interaction.questionTitle')
+}
+
+/* ── Message queue: prompts typed while a turn runs send when it ends ─────── */
+
+function queueFor(sessionId: string): string[] {
+  const queue = state.queues.get(sessionId) ?? []
+  state.queues.set(sessionId, queue)
+  return queue
+}
+
+function renderQueueDock(): void {
+  const sessionId = state.selectedSessionId ?? DRAFT_SESSION_ID
+  const queue = state.queues.get(sessionId) ?? []
+  const paused = state.pausedQueues.has(sessionId)
+  el.queueDock.hidden = state.activeModule !== 'sessions' || queue.length === 0
+  if (el.queueDock.hidden) {
+    el.queueDock.innerHTML = ''
+    return
+  }
+  el.queueDock.innerHTML = `
+    <section class="queue-card">
+      <header><strong>${escapeHtml(t('queue.title'))}</strong><span>${queue.length}</span></header>
+      ${queue.map((text, index) => `
+        <div class="queue-item">
+          <button type="button" class="queue-text" data-queue-edit="${index}" title="${escapeHtml(t('queue.edit'))}">${escapeHtml(truncate(text, 120))}</button>
+          <button type="button" class="queue-remove" data-queue-remove="${index}" aria-label="${escapeHtml(t('queue.remove'))}">×</button>
+        </div>
+      `).join('')}
+      ${paused ? `<footer class="queue-paused"><span>${escapeHtml(t('queue.paused'))}</span><button type="button" data-queue-resume="true">${escapeHtml(t('queue.resume'))}</button></footer>` : ''}
+    </section>
+  `
+}
+
+/** Send the next queued prompt once the turn is over and the queue is running. */
+function maybeSendNextQueued(sessionId: string): void {
+  if (state.busySessionId !== undefined || state.pausedQueues.has(sessionId)) return
+  if (state.selectedSessionId !== sessionId) return
+  const queue = state.queues.get(sessionId) ?? []
+  const next = queue.shift()
+  renderQueueDock()
+  if (next !== undefined) void sendPrompt(next)
+}
+
+/** Latest plan snapshot for the selected session: live beats persisted. */
+function currentPlanItems(): PlanItem[] {
+  const live = currentLiveTurn()
+  if (live?.plan !== undefined && live.plan.length > 0) return [...live.plan]
+  const planTargets = [...state.graph.targets.values()].filter(target => target.kind === 'plan')
+  const last = planTargets[planTargets.length - 1]
+  return last === undefined ? [] : planItemsOf(last)
+}
+
+function renderPlanDock(): void {
+  const items = state.activeModule === 'sessions' ? currentPlanItems() : []
+  const allDone = items.length > 0 && items.every(item => item.status === 'completed')
+  el.planDock.hidden = items.length === 0 || allDone
+  el.planDock.innerHTML = el.planDock.hidden ? '' : renderPlanList(items)
+}
+
 function planItemsOf(target: TraceTarget): PlanItem[] {
   return (Array.isArray(target.output) ? target.output : []).map(item => ({ content: String(asRecord(item).content ?? ''), status: String(asRecord(item).status ?? 'pending') }))
 }
@@ -1618,7 +1775,14 @@ function wireStaticEvents(): void {
   el.composerForm.addEventListener('submit', (event) => {
     event.preventDefault()
     const prompt = el.composerInput.value.trim()
-    if (prompt.length === 0 || state.busySessionId !== undefined) return
+    if (prompt.length === 0) return
+    if (state.busySessionId !== undefined) {
+      queueFor(state.selectedSessionId ?? DRAFT_SESSION_ID).push(prompt)
+      el.composerInput.value = ''
+      updateComposerState()
+      renderQueueDock()
+      return
+    }
     void sendPrompt(prompt)
   })
   el.cancelButton.addEventListener('click', () => {
@@ -1720,6 +1884,46 @@ async function handleDelegatedClick(event: MouseEvent): Promise<void> {
     return
   }
 
+  const respondOption = target.closest<HTMLElement>('[data-respond-option]')
+  if (respondOption !== null) {
+    void respondInteraction(respondOption.dataset.respondId ?? '', { optionId: respondOption.dataset.respondOption })
+    return
+  }
+  const respondAccept = target.closest<HTMLElement>('[data-respond-accept]')?.dataset.respondAccept
+  if (respondAccept !== undefined) {
+    void respondInteraction(respondAccept, { accepted: true })
+    return
+  }
+  const respondCancel = target.closest<HTMLElement>('[data-respond-cancel]')?.dataset.respondCancel
+  if (respondCancel !== undefined) {
+    void respondInteraction(respondCancel, { cancelled: true })
+    return
+  }
+  const queueEdit = target.closest<HTMLElement>('[data-queue-edit]')?.dataset.queueEdit
+  if (queueEdit !== undefined) {
+    const queue = queueFor(state.selectedSessionId ?? DRAFT_SESSION_ID)
+    const [text] = queue.splice(Number(queueEdit), 1)
+    if (text !== undefined) {
+      el.composerInput.value = text
+      updateComposerState()
+      el.composerInput.focus()
+    }
+    renderQueueDock()
+    return
+  }
+  const queueRemove = target.closest<HTMLElement>('[data-queue-remove]')?.dataset.queueRemove
+  if (queueRemove !== undefined) {
+    queueFor(state.selectedSessionId ?? DRAFT_SESSION_ID).splice(Number(queueRemove), 1)
+    renderQueueDock()
+    return
+  }
+  if (target.closest<HTMLElement>('[data-queue-resume]') !== null) {
+    state.pausedQueues.delete(state.selectedSessionId ?? DRAFT_SESSION_ID)
+    renderQueueDock()
+    maybeSendNextQueued(state.selectedSessionId ?? DRAFT_SESSION_ID)
+    return
+  }
+
   const openPath = target.closest<HTMLElement>('[data-open-path]')?.dataset.openPath
   if (openPath !== undefined) {
     try {
diff --git a/packages/ui/desktop/src/global.d.ts b/packages/ui/desktop/src/global.d.ts
index 73b4e4c205..70221475cc 100644
--- a/packages/ui/desktop/src/global.d.ts
+++ b/packages/ui/desktop/src/global.d.ts
@@ -31,6 +31,10 @@ declare global {
         status(): Promise<unknown>
         openPath(path: string): Promise<unknown>
       }
+      interaction: {
+        onRequest(callback: (payload: unknown) => void): () => void
+        respond(id: string, response: unknown): Promise<unknown>
+      }
     }
   }
 }
diff --git a/packages/ui/desktop/src/i18n.ts b/packages/ui/desktop/src/i18n.ts
index 82feac34c5..4dc5c5c569 100644
--- a/packages/ui/desktop/src/i18n.ts
+++ b/packages/ui/desktop/src/i18n.ts
@@ -80,6 +80,17 @@ const messages = {
     'dev.openFailed': '打开失败',
     'app.resizeSidebar': '调整侧栏宽度',
     'app.resizeInspector': '调整检查器宽度',
+    'chat.turnFailed': '回合异常结束',
+    'queue.title': '排队消息',
+    'queue.hintBusy': 'Enter 加入队列 · 回合结束自动发送',
+    'queue.paused': '队列已暂停（你中断了当前回合）',
+    'queue.resume': '继续发送',
+    'queue.remove': '删除',
+    'queue.edit': '编辑',
+    'interaction.permissionTitle': '权限请求',
+    'interaction.questionTitle': '需要你确认',
+    'interaction.dismiss': '拒绝',
+    'interaction.accept': '接受',
     'kind.plan': '计划',
     'kind.verb.read': '读取',
     'kind.verb.edit': '编辑',
@@ -351,6 +362,17 @@ const messages = {
     'dev.openFailed': 'Failed to open',
     'app.resizeSidebar': 'Resize sidebar',
     'app.resizeInspector': 'Resize inspector',
+    'chat.turnFailed': 'Turn ended abnormally',
+    'queue.title': 'Queued messages',
+    'queue.hintBusy': 'Enter queues · sends when the turn ends',
+    'queue.paused': 'Queue paused (you interrupted the turn)',
+    'queue.resume': 'Resume',
+    'queue.remove': 'Remove',
+    'queue.edit': 'Edit',
+    'interaction.permissionTitle': 'Permission request',
+    'interaction.questionTitle': 'Your confirmation needed',
+    'interaction.dismiss': 'Reject',
+    'interaction.accept': 'Accept',
     'kind.plan': 'Plan',
     'kind.verb.read': 'Read',
     'kind.verb.edit': 'Edit',
diff --git a/packages/ui/desktop/src/main.mjs b/packages/ui/desktop/src/main.mjs
index 7577f3f13b..3fd95545d3 100644
--- a/packages/ui/desktop/src/main.mjs
+++ b/packages/ui/desktop/src/main.mjs
@@ -30,6 +30,23 @@ let initializeResult
 let stderrTail = ''
 /** @type {Map<string, {sessionId: string, loaded: boolean, cwd: string, title?: string}>} */
 const activeSessions = new Map()
+
+let interactionCounter = 0
+/** @type {Map<string, {resolve: (response: unknown) => void, payload: unknown}>} */
+const pendingInteractions = new Map()
+
+/**
+ * Ask the renderer to resolve a permission or elicitation card. The promise
+ * settles when any window responds; pending cards replay on renderer reload.
+ */
+function requestRendererInteraction(kind, request) {
+  return new Promise((resolve) => {
+    const id = `interaction-${++interactionCounter}`
+    const payload = { id, kind, ...request }
+    pendingInteractions.set(id, { resolve, payload })
+    broadcast('interaction:request', payload)
+  })
+}
 const replayingSessions = new Set()
 
 function broadcast(channel, payload) {
@@ -112,31 +129,26 @@ async function startRuntime() {
       return Promise.resolve()
     },
     async requestPermission(params) {
-      const options = params.options.map(option => `${option.name ?? option.optionId} (${option.kind})`)
-      const result = await dialog.showMessageBox(mainWindow, {
-        type: 'question',
-        buttons: [...options, 'Cancel'],
-        cancelId: options.length,
-        defaultId: 0,
-        title: 'Harness permission request',
-        message: params.toolCall.title ?? 'Tool permission request',
-        detail: JSON.stringify(params.toolCall.rawInput ?? params.toolCall, null, 2),
+      const response = await requestRendererInteraction('permission', {
+        sessionId: params.sessionId,
+        title: params.toolCall?.title ?? 'Tool permission request',
+        detail: params.toolCall?.rawInput ?? params.toolCall ?? {},
+        options: params.options.map(option => ({ optionId: option.optionId, name: option.name ?? option.optionId, kind: option.kind })),
       })
-      const option = params.options[result.response]
-      if (option === undefined) return { outcome: { outcome: 'cancelled' } }
-      return { outcome: { outcome: 'selected', optionId: option.optionId } }
+      const optionId = response?.optionId
+      if (typeof optionId === 'string' && params.options.some(option => option.optionId === optionId)) {
+        return { outcome: { outcome: 'selected', optionId } }
+      }
+      return { outcome: { outcome: 'cancelled' } }
     },
     async unstable_createElicitation(params) {
-      const result = await dialog.showMessageBox(mainWindow, {
-        type: 'question',
-        buttons: ['Accept', 'Cancel'],
-        cancelId: 1,
-        defaultId: 0,
-        title: 'Harness needs input',
-        message: params.message,
-        detail: JSON.stringify(params, null, 2),
+      const response = await requestRendererInteraction('elicitation', {
+        sessionId: params.sessionId,
+        title: params.message,
+        detail: params,
+        options: [],
       })
-      return result.response === 0 ? { action: 'accept', content: {} } : { action: 'cancel' }
+      return response?.accepted === true ? { action: 'accept', content: {} } : { action: 'cancel' }
     },
   }), stream)
 
@@ -545,6 +557,13 @@ function registerIpc() {
   ipcMain.handle('feedback:list', (_event, { sessionId, targetId }) => readFeedback(String(sessionId), targetId === undefined ? undefined : String(targetId)))
   ipcMain.handle('feedback:add', (_event, entry) => appendFeedback(entry))
   ipcMain.handle('dev:status', () => devStatus())
+  ipcMain.handle('interaction:respond', (_event, { id, response }) => {
+    const pending = pendingInteractions.get(String(id))
+    if (pending === undefined) return { ok: false }
+    pendingInteractions.delete(String(id))
+    pending.resolve(response)
+    return { ok: true }
+  })
 }
 
 async function createWindow() {
@@ -563,6 +582,12 @@ async function createWindow() {
     },
   })
 
+  mainWindow.webContents.on('did-finish-load', () => {
+    for (const pending of pendingInteractions.values()) {
+      mainWindow?.webContents.send('interaction:request', pending.payload)
+    }
+  })
+
   if (process.env.VITE_DEV_SERVER_URL !== undefined) {
     await mainWindow.loadURL(process.env.VITE_DEV_SERVER_URL)
     if (process.env.DSH_DESKTOP_OPEN_DEVTOOLS === '1') mainWindow.webContents.openDevTools({ mode: 'detach' })
diff --git a/packages/ui/desktop/src/preload.cjs b/packages/ui/desktop/src/preload.cjs
index d42b5a8da2..070d0c1472 100644
--- a/packages/ui/desktop/src/preload.cjs
+++ b/packages/ui/desktop/src/preload.cjs
@@ -41,6 +41,14 @@ const api = {
     status: () => ipcRenderer.invoke('dev:status'),
     openPath: (path) => ipcRenderer.invoke('dev:open-path', { path }),
   },
+  interaction: {
+    onRequest: (callback) => {
+      const listener = (_event, payload) => { callback(payload) }
+      ipcRenderer.on('interaction:request', listener)
+      return () => { ipcRenderer.removeListener('interaction:request', listener) }
+    },
+    respond: (id, response) => ipcRenderer.invoke('interaction:respond', { id, response }),
+  },
 }
 
 contextBridge.exposeInMainWorld('dshDesktop', api)
diff --git a/packages/ui/desktop/src/styles.css b/packages/ui/desktop/src/styles.css
index af31b08dd1..109bdfced3 100644
--- a/packages/ui/desktop/src/styles.css
+++ b/packages/ui/desktop/src/styles.css
@@ -3088,3 +3088,166 @@ dd {
   font-family: "SF Mono", ui-monospace, Menlo, Monaco, Consolas, monospace;
   font-size: 11px;
 }
+
+/* Plan dock: the checklist rides above the composer instead of the thread. */
+.composer-dock {
+  width: min(920px, calc(100% - 68px));
+  margin: 0 auto;
+}
+
+.composer-dock .plan-card {
+  max-height: 180px;
+  overflow: auto;
+  box-shadow: var(--shadow-sm);
+}
+
+.composer-dock[hidden] {
+  display: none;
+}
+
+/* Abnormal turn endings surface inline, not only in a toast. */
+.turn-error {
+  width: fit-content;
+  margin: 4px 0 0 47px;
+  padding: 6px 10px;
+  border: 1px solid color-mix(in oklab, var(--red) 30%, transparent);
+  border-radius: var(--radius-sm);
+  background: color-mix(in oklab, var(--red) 6%, transparent);
+  color: var(--red);
+  font-size: 12px;
+}
+
+/* ── Interaction cards and message queue above the composer ──────────────── */
+
+.interaction-card {
+  overflow: hidden;
+  margin-bottom: 8px;
+  border: 1px solid color-mix(in oklab, var(--amber) 38%, transparent);
+  border-radius: var(--radius-lg);
+  background: color-mix(in oklab, var(--amber) 5%, #fff);
+  box-shadow: var(--shadow-md);
+}
+
+.interaction-card header {
+  display: flex;
+  align-items: baseline;
+  gap: 10px;
+  padding: 10px 12px 6px;
+}
+
+.interaction-card header strong {
+  font-size: 13px;
+}
+
+.interaction-card header span {
+  overflow: hidden;
+  color: var(--ink-soft);
+  font-size: 12px;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.interaction-card .metadata-line {
+  margin: 0 12px;
+}
+
+.interaction-actions {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 6px;
+  padding: 8px 12px 12px;
+}
+
+.interaction-actions button {
+  height: var(--control-md);
+  padding: 0 12px;
+  border: 1px solid var(--line);
+  border-radius: var(--radius-sm);
+  background: #fff;
+  color: var(--ink-soft);
+  font-size: 12px;
+  font-weight: 650;
+}
+
+.interaction-actions button.allow {
+  border-color: transparent;
+  background: var(--ink);
+  color: #fff;
+}
+
+.interaction-actions button.reject {
+  color: var(--red);
+}
+
+.queue-card {
+  margin-bottom: 8px;
+  padding: 8px 10px;
+  border: 1px solid var(--line);
+  border-radius: var(--radius-lg);
+  background: rgba(255, 255, 255, 0.9);
+}
+
+.queue-card header {
+  display: flex;
+  justify-content: space-between;
+  padding: 0 2px 4px;
+  color: var(--muted);
+  font-size: 11px;
+  font-weight: 700;
+  text-transform: uppercase;
+}
+
+.queue-item {
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.queue-item .queue-text {
+  overflow: hidden;
+  flex: 1;
+  min-height: var(--control-sm);
+  padding: 2px 8px;
+  border-radius: var(--radius-xs);
+  color: var(--ink-soft);
+  font-size: 12px;
+  text-align: left;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.queue-item .queue-text:hover {
+  background: var(--hover-overlay);
+}
+
+.queue-item .queue-remove {
+  width: var(--control-sm);
+  height: var(--control-sm);
+  border-radius: var(--radius-xs);
+  color: var(--muted);
+}
+
+.queue-item .queue-remove:hover {
+  background: var(--hover-overlay);
+  color: var(--red);
+}
+
+.queue-paused {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-top: 6px;
+  padding: 4px 8px;
+  border-radius: var(--radius-xs);
+  background: color-mix(in oklab, var(--amber) 8%, transparent);
+  color: var(--amber);
+  font-size: 11px;
+}
+
+.queue-paused button {
+  height: 22px;
+  padding: 0 8px;
+  border: 1px solid color-mix(in oklab, var(--amber) 40%, transparent);
+  border-radius: var(--radius-xs);
+  font-weight: 650;
+}
diff --git a/packages/ui/desktop/tests/renderer.spec.ts b/packages/ui/desktop/tests/renderer.spec.ts
index 311cd42336..0a9b1e23ef 100644
--- a/packages/ui/desktop/tests/renderer.spec.ts
+++ b/packages/ui/desktop/tests/renderer.spec.ts
@@ -16,6 +16,13 @@ function deferred<T>(): Deferred<T> {
   return { promise, resolve }
 }
 
+function submitPrompt(text: string): void {
+  const composer = document.querySelector<HTMLTextAreaElement>('#composerInput')!
+  composer.value = text
+  composer.dispatchEvent(new Event('input', { bubbles: true }))
+  document.querySelector<HTMLFormElement>('#composerForm')!.dispatchEvent(new Event('submit', { bubbles: true, cancelable: true }))
+}
+
 describe('desktop renderer chat lifecycle', () => {
   beforeEach(() => {
     vi.resetModules()
@@ -94,6 +101,7 @@ describe('desktop renderer chat lifecycle', () => {
       trace: { read: async () => traceRead },
       feedback: { list: async () => [], add: async () => ({}) },
       dev: { status: async () => ({ git: {} }), openPath: async () => ({}) },
+      interaction: { onRequest: () => () => {}, respond: async () => ({}) },
     }
 
     await import('../src/app.ts')
@@ -287,19 +295,14 @@ describe('desktop renderer chat lifecycle', () => {
       trace: { read: async () => traceRead },
       feedback: { list: async () => [], add: async () => ({}) },
       dev: { status: async () => ({ git: {} }), openPath: async () => ({}) },
+      interaction: { onRequest: () => () => {}, respond: async () => ({}) },
     }
 
     await import('../src/app.ts')
     await vi.waitFor(() => {
       expect(document.querySelector('#composerInput')).not.toBeNull()
     })
-    const composer = document.querySelector<HTMLTextAreaElement>('#composerInput')!
-    const form = document.querySelector<HTMLFormElement>('#composerForm')!
-    const send = (text: string): void => {
-      composer.value = text
-      composer.dispatchEvent(new Event('input', { bubbles: true }))
-      form.dispatchEvent(new Event('submit', { bubbles: true, cancelable: true }))
-    }
+    const send = submitPrompt
 
     document.querySelector<HTMLButtonElement>('[data-action="new-session"]')!.click()
     send('first')
@@ -329,9 +332,9 @@ describe('desktop renderer chat lifecycle', () => {
       { content: 'write the report', priority: 'medium', status: 'pending' },
     ] } })
     await vi.waitFor(() => {
-      const livePlan = document.querySelector('[data-live="plan"] .plan-card')
-      expect(livePlan?.textContent).toContain('collect findings')
-      expect(livePlan?.textContent).toContain('0/2')
+      const dockPlan = document.querySelector('#planDock .plan-card')
+      expect(dockPlan?.textContent).toContain('collect findings')
+      expect(dockPlan?.textContent).toContain('0/2')
     })
 
     // Once the persisted log catches up, the view converges with no user action.
@@ -343,10 +346,119 @@ describe('desktop renderer chat lifecycle', () => {
     }, { timeout: 4000 })
     // The live workflow presentation survives the switch to the persisted view.
     expect(document.querySelector('#conversation')?.textContent).toContain('workflow: run audit agents')
-    // The persisted todo/write renders as a checklist card with the streamed kind verb.
-    const planCard = document.querySelector('#conversation .plan-activity .plan-card')
-    expect(planCard?.textContent).toContain('write the report')
-    expect(planCard?.textContent).toContain('1/2')
+    // The checklist docks above the composer (latest persisted snapshot), and
+    // the thread itself does not repeat it.
+    const dockPlan = document.querySelector('#planDock .plan-card')
+    expect(dockPlan?.textContent).toContain('write the report')
+    expect(dockPlan?.textContent).toContain('1/2')
+    expect(document.querySelector('#conversation .plan-activity')).toBeNull()
     expect(document.querySelector('#conversation .chat-activity.tool-use .activity-select span')?.textContent).toBe('执行')
   })
+
+  it('queues prompts while a turn runs and renders permission cards from main', async () => {
+    const prompts: Deferred<unknown>[] = [deferred(), deferred()]
+    const promptQueue = [...prompts]
+    const promptedTexts: string[] = []
+    const responses: unknown[] = []
+    let interactionCallback: ((payload: unknown) => void) | undefined
+    const turnTrace = {
+      found: true,
+      sessionId: 's-q',
+      header: { id: 's-q' },
+      rawText: '',
+      feedback: [],
+      events: [
+        { type: 'turn/start', seq: 0, time: 1, data: { turn: 1, trigger: { kind: 'message' } } },
+        { type: 'user/message', seq: 1, time: 2, data: { content: [{ type: 'text', text: 'first' }] } },
+        { type: 'step/start', seq: 2, time: 3, data: { turn: 1, step: 1 } },
+        { type: 'assistant/message', seq: 3, time: 4, data: { turn: 1, step: 1, content: [{ type: 'text', text: 'first answer' }] } },
+        { type: 'step/end', seq: 4, time: 5, data: { turn: 1, step: 1 } },
+        { type: 'turn/end', seq: 5, time: 6, data: { turn: 1, reason: { kind: 'completed' } } },
+      ],
+    }
+
+    window.dshDesktop = {
+      runtime: {
+        start: async () => ({}),
+        stop: async () => ({}),
+        restart: async () => ({}),
+        status: async () => ({ state: 'running', repoRoot: '/repo' }),
+        onStatus: () => () => {},
+        onStderr: () => () => {},
+      },
+      sessions: {
+        list: async () => ({ sessions: [] }),
+        create: async () => ({ sessionId: 's-q', trace: { ...turnTrace, events: [] } }),
+        load: async () => ({}),
+        prompt: async (_sessionId: string, text: string) => {
+          promptedTexts.push(text)
+          return promptQueue.shift()!.promise
+        },
+        cancel: async () => ({}),
+        reveal: async () => ({}),
+        onUpdate: () => () => {},
+      },
+      trace: { read: async () => turnTrace },
+      feedback: { list: async () => [], add: async () => ({}) },
+      dev: { status: async () => ({ git: {} }), openPath: async () => ({}) },
+      interaction: {
+        onRequest: (callback: (payload: unknown) => void) => {
+          interactionCallback = callback
+          return () => {}
+        },
+        respond: async (id: string, response: unknown) => {
+          responses.push({ id, response })
+          return {}
+        },
+      },
+    }
+
+    await import('../src/app.ts')
+    await vi.waitFor(() => {
+      expect(document.querySelector('#composerInput')).not.toBeNull()
+    })
+    const composer = document.querySelector<HTMLTextAreaElement>('#composerInput')!
+    const send = submitPrompt
+
+    document.querySelector<HTMLButtonElement>('[data-action="new-session"]')!.click()
+    send('first')
+    await vi.waitFor(() => {
+      expect(promptedTexts).toEqual(['first'])
+    })
+
+    // Busy: the next prompt queues instead of being dropped or blocked.
+    send('second')
+    const queueDock = document.querySelector<HTMLElement>('#queueDock')!
+    expect(queueDock.hidden).toBe(false)
+    expect(queueDock.textContent).toContain('second')
+    expect(composer.value).toBe('')
+
+    // A permission request from main renders as a card; answering routes back.
+    interactionCallback?.({
+      id: 'i-1',
+      kind: 'permission',
+      sessionId: 's-q',
+      title: 'bash: rm -rf build',
+      detail: { command: 'rm -rf build' },
+      options: [
+        { optionId: 'allow-once', name: 'Allow once', kind: 'allow_once' },
+        { optionId: 'reject-once', name: 'Reject', kind: 'reject_once' },
+      ],
+    })
+    const card = document.querySelector<HTMLElement>('#interactionDock .interaction-card')!
+    expect(card.textContent).toContain('bash: rm -rf build')
+    card.querySelector<HTMLButtonElement>('[data-respond-option="allow-once"]')!.click()
+    await vi.waitFor(() => {
+      expect(responses).toEqual([{ id: 'i-1', response: { optionId: 'allow-once' } }])
+      expect(document.querySelector<HTMLElement>('#interactionDock')?.hidden).toBe(true)
+    })
+
+    // Turn completion drains the queue automatically.
+    prompts[0]!.resolve({ response: {}, trace: turnTrace })
+    await vi.waitFor(() => {
+      expect(promptedTexts).toEqual(['first', 'second'])
+      expect(document.querySelector<HTMLElement>('#queueDock')?.hidden).toBe(true)
+    })
+    expect(document.querySelector('#liveTurn .user-bubble')?.textContent).toBe('second')
+  })
 })