diff --git a/e2e/work-companion-live.playwright.ts b/e2e/work-companion-live.playwright.ts
new file mode 100644
index 0000000..b3be563
--- /dev/null
+++ b/e2e/work-companion-live.playwright.ts
@@ -0,0 +1,132 @@
+import { test, expect, type Page, type APIRequestContext, type Response } from '@playwright/test'
+import type { Artifact, Message, Part, Run, UploadInfo } from '../src/contracts'
+
+test.skip(!process.env.WORK_COMPANION_LIVE_BROWSER, 'Requires the task-owned backend, SQLite data and MockRunner')
+
+async function openRealConversation(page: Page, request: APIRequestContext) {
+  const projectResponse = await request.post('/api/projects', { data: { name: '工作台验收 ' + Date.now() } })
+  expect(projectResponse.ok()).toBe(true)
+  const project = await projectResponse.json()
+  const conversationResponse = await request.post(`/api/projects/${project.id}/conversations`, { data: { title: '真实接口验收' } })
+  expect(conversationResponse.ok()).toBe(true)
+  const conversation = await conversationResponse.json()
+  await page.addInitScript(({ projectId, conversationId }) => {
+    localStorage.setItem('as.conv', conversationId)
+    localStorage.setItem('as.ui', JSON.stringify({ theme: 'light', rightCollapsed: true, lastProjectId: projectId }))
+  }, { projectId: project.id, conversationId: conversation.id })
+  await page.goto('/')
+  await expect(page.locator('.chat-title')).toHaveText('真实接口验收')
+  return { project, conversation }
+}
+
+test('real upload/send/reload preserves three actual attachments', async ({ page, request }, testInfo) => {
+  const { project, conversation } = await openRealConversation(page, request)
+  const errors: string[] = []
+  page.on('pageerror', error => errors.push(error.message))
+  const uploadResponses: Response[] = []
+  const uploadPath = `/api/projects/${project.id}/uploads`
+  const observeUpload = (response: Response) => {
+    if (response.request().method() === 'POST' && new URL(response.url()).pathname === uploadPath) uploadResponses.push(response)
+  }
+  page.on('response', observeUpload)
+  await page.locator('input[type=file]').first().setInputFiles([
+    { name: '会议纪要.txt', mimeType: 'text/plain', buffer: Buffer.from('会议决定：先明确交付日期') },
+    { name: '需求说明.txt', mimeType: 'text/plain', buffer: Buffer.from('需求：整理材料并生成摘要') },
+    { name: '评审意见.txt', mimeType: 'text/plain', buffer: Buffer.from('评审意见：补充验收标准') },
+  ])
+  await expect(page.locator('.attach-chip')).toHaveCount(3)
+  page.off('response', observeUpload)
+  expect(uploadResponses).toHaveLength(3)
+  const uploads: UploadInfo[] = await Promise.all(uploadResponses.map(async response => {
+    expect(response.ok()).toBe(true)
+    return response.json()
+  }))
+  expect(uploads.map(upload => upload.filename)).toEqual(['会议纪要.txt', '需求说明.txt', '评审意见.txt'])
+  const attachmentIds = uploads.map(upload => upload.artifactId)
+  for (const id of attachmentIds) expect(id).toEqual(expect.stringMatching(/\S+/))
+  expect(new Set(attachmentIds).size).toBe(3)
+  const artifactsResponse = await request.get(`/api/projects/${project.id}/artifacts`)
+  expect(artifactsResponse.ok()).toBe(true)
+  const artifacts: Artifact[] = await artifactsResponse.json()
+  expect(artifacts).toHaveLength(3)
+  expect(artifacts.map(artifact => artifact.id).sort()).toEqual([...attachmentIds].sort())
+  const expectedParts: Part[] = uploads.map(upload => {
+    const artifact = artifacts.find(artifact => artifact.id === upload.artifactId)!
+    expect(artifact.name).toBe(upload.filename)
+    return { type: 'artifact_ref', artifact: { artifactId: artifact.id, name: artifact.name, kind: artifact.kind } }
+  })
+  const messagePath = `/api/conversations/${conversation.id}/messages`
+  const [sendRequest, sendResponse] = await Promise.all([
+    page.waitForRequest(request => request.method() === 'POST' && new URL(request.url()).pathname === messagePath),
+    page.waitForResponse(response => response.request().method() === 'POST' && new URL(response.url()).pathname === messagePath),
+    page.getByRole('button', { name: '发送', exact: true }).click(),
+  ])
+  const sent = sendRequest.postDataJSON()
+  expect(sent.text).toBe('')
+  expect(sent.attachmentIds).toEqual(attachmentIds)
+  expect(sendResponse.ok()).toBe(true)
+  const accepted: { message: Message; run: Run } = await sendResponse.json()
+  expect(accepted.message.role).toBe('user')
+  expect(accepted.message.conversationId).toBe(conversation.id)
+  expect(accepted.message.parts).toEqual(expectedParts)
+  expect(accepted.run.kind).toBe('conversation')
+  await expect.poll(async () => {
+    const response = await request.get(`/api/conversations/${conversation.id}`)
+    expect(response.ok()).toBe(true)
+    const current: { runs: Run[] } = await response.json()
+    return current.runs.some(run => run.id === accepted.run.id && run.kind === 'conversation' && run.status === 'completed')
+  }).toBe(true)
+  async function persistedMessage() {
+    const response = await request.get(`/api/conversations/${conversation.id}`)
+    expect(response.ok()).toBe(true)
+    const current: { messages: Message[] } = await response.json()
+    const users = current.messages.filter(message => message.role === 'user')
+    expect(users).toHaveLength(1)
+    expect(users[0].id).toBe(accepted.message.id)
+    expect(users[0].conversationId).toBe(conversation.id)
+    expect(users[0].parts).toEqual(expectedParts)
+    return users[0]
+  }
+  const beforeReload = await persistedMessage()
+  await page.reload()
+  await expect(page.locator('.chat-title')).toHaveText('真实接口验收')
+  const afterReload = await persistedMessage()
+  expect(afterReload).toEqual(beforeReload)
+  const association = { projectId: project.id, conversationId: conversation.id, runId: accepted.run.id,
+    uploads: uploads.map(({ artifactId, filename }) => ({ artifactId, filename })),
+    sent: { text: sent.text, attachmentIds: sent.attachmentIds }, beforeReload, afterReload }
+  await testInfo.attach('real-material-associations', { body: Buffer.from(JSON.stringify(association, null, 2)), contentType: 'application/json' })
+  console.log('real-material-associations', JSON.stringify(association))
+  await page.getByRole('button', { name: '打开文件', exact: true }).click()
+  await expect(page.locator('[data-artifact-row]')).toHaveCount(3)
+  await page.locator('[data-artifact-row]').first().click()
+  await expect(page.locator('.preview-pane-name')).toBeVisible()
+  expect(errors).toEqual([])
+})
+
+test('real background card and HITL decision survive query reconciliation', async ({ page, request }) => {
+  const { conversation } = await openRealConversation(page, request)
+  const errors: string[] = []
+  page.on('pageerror', error => errors.push(error.message))
+  const input = page.getByRole('textbox', { name: '工作目标或消息', exact: true })
+  // Backend's deterministic runner exercises the real run/card/event lifecycle;
+  // this is not a live-model quality or stage-findings test.
+  await input.fill('#background')
+  await page.getByRole('button', { name: '发送', exact: true }).click()
+  await expect.poll(async () => {
+    const out = await request.get(`/api/conversations/${conversation.id}/cards`).then(r => r.json())
+    return out.cards?.some((card: { kind: string; status: string }) => card.kind === 'progress' && ['done', 'failed'].includes(card.status))
+  }, { timeout: 15000 }).toBe(true)
+  await expect(page.locator('[data-conversation-work]')).toBeVisible()
+  await expect(page.getByRole('button', { name: '发送', exact: true })).toBeVisible()
+  await input.fill('#hitl')
+  await page.getByRole('button', { name: '发送', exact: true }).click()
+  await expect(page.locator('.hitl-card')).toBeVisible()
+  await page.locator('.hitl-card').getByRole('button', { name: /Markdown 文档/ }).click()
+  await expect(page.locator('.hitl-card')).toHaveCount(0)
+  await expect.poll(async () => {
+    const current = await request.get(`/api/conversations/${conversation.id}`).then(r => r.json())
+    return current.activeHitl.length
+  }).toBe(0)
+  expect(errors).toEqual([])
+})
diff --git a/e2e/work-companion-navigation.playwright.ts b/e2e/work-companion-navigation.playwright.ts
new file mode 100644
index 0000000..de01844
--- /dev/null
+++ b/e2e/work-companion-navigation.playwright.ts
@@ -0,0 +1,141 @@
+import { expect, test, type Page } from '@playwright/test'
+import type { Artifact, Conversation, SurfaceMeta, SurfaceSnapshot } from '../src/contracts'
+
+test.skip(!process.env.WORK_COMPANION_BROWSER, 'Run explicitly against the task-owned UI preview')
+
+const stamp = '2026-10-12T10:00:00Z'
+const conversation: Conversation = {
+  id: 'navigation-conversation', projectId: 'navigation-project', title: '继续阅读材料',
+  createdAt: stamp, updatedAt: stamp,
+}
+const artifact: Artifact = {
+  id: 'navigation-document', projectId: conversation.projectId, name: '材料摘要.md', kind: 'markdown',
+  size: 64, createdAt: stamp, updatedAt: stamp,
+}
+const snapshot: SurfaceSnapshot = {
+  identity: { surfaceId: 'saved-navigation-page', owner: 'reader', pluginId: 'generative-ui', conversationId: conversation.id },
+  compat: { schemaVersion: 1, catalogVersion: 'ui-v1' }, revision: 1, activationEpoch: 1,
+  spec: { title: '已保存的材料页面', nodes: [
+    { id: 'summary', type: 'markdown', markdown: '已保存的材料范围' },
+    { id: 'source', type: 'doc-ref', docId: artifact.id },
+  ] },
+}
+const metadata: SurfaceMeta = {
+  surfaceId: snapshot.identity.surfaceId, title: snapshot.spec.title, pluginId: snapshot.identity.pluginId,
+  revision: snapshot.revision, conversationId: conversation.id, updatedAt: stamp,
+}
+
+// Delay the external list contract, while running the real store, App and panes.
+// The saved selection is restored by openConversation rather than test-only state injection.
+async function fixture(page: Page) {
+  const errors: string[] = []
+  page.on('pageerror', error => errors.push(error.message))
+  let release!: () => void
+  const hydration = new Promise<void>(resolve => { release = resolve })
+  await page.addInitScript(({ conversationId }) => {
+    localStorage.setItem('as.conv', conversationId)
+    localStorage.setItem('as.ui', JSON.stringify({
+      theme: 'light', rightTab: 'files', filesView: 'preview', rightCollapsed: true,
+    }))
+  }, { conversationId: conversation.id })
+  await page.route('**/api/**', async route => {
+    const request = route.request()
+    const path = new URL(request.url()).pathname
+    if (request.method() !== 'GET') return route.fulfill({ status: 405, body: 'read-only navigation fixture' })
+    if (path === '/api/events') return route.fulfill({ contentType: 'text/event-stream', body: ': connected\n\n' })
+    let body: unknown = []
+    if (path === '/api/health') body = { ok: true }
+    else if (path === '/api/me') body = { owner: 'reader', name: '材料阅读者', auth: true, authVia: 'session', isAdmin: false }
+    else if (path === '/api/projects') body = [{ id: conversation.projectId, name: '材料项目', createdAt: stamp, updatedAt: stamp }]
+    else if (path === '/api/conversations') body = [conversation]
+    else if (path === `/api/conversations/${conversation.id}`) body = { conversation, messages: [], runs: [], activeHitl: [], lastSeq: 0 }
+    else if (path === `/api/conversations/${conversation.id}/surfaces`) { await hydration; body = [metadata] }
+    else if (path === `/api/surfaces/${snapshot.identity.surfaceId}`) body = snapshot
+    else if (path === `/api/conversations/${conversation.id}/cards`) body = { cards: [] }
+    else if (path === `/api/projects/${conversation.projectId}/artifacts`) body = [artifact]
+    else if (path === `/api/artifacts/${artifact.id}/content`) {
+      return route.fulfill({ contentType: 'text/markdown', body: '# 材料摘要\n\n原始材料的阅读范围' })
+    } else if (path === '/api/settings') body = { user: {}, project: {}, effective: {}, schema: [] }
+    else if (path === '/api/workspaces') body = [{ id: 'navigation-materials', title: '材料工作区',
+      body: [{ type: 'doc-ref', docId: artifact.id }] }]
+    else if (path.endsWith('/plan') || path.endsWith('/todos')) body = null
+    await route.fulfill({ contentType: 'application/json', body: JSON.stringify(body) })
+  })
+  const listRequest = page.waitForRequest(request => new URL(request.url()).pathname === `/api/conversations/${conversation.id}/surfaces`)
+  await page.goto('/')
+  await listRequest
+  await expect(page.locator('.chat-title')).toHaveText(conversation.title)
+  return { release, errors }
+}
+
+for (const width of [736, 390]) {
+  test(`keeps context and focus when saved Surface hydration arrives at ${width}px`, async ({ page }) => {
+    await page.setViewportSize({ width, height: 900 })
+    const state = await fixture(page)
+    await page.getByRole('button', { name: '打开上下文', exact: true }).click()
+    const search = page.getByRole('textbox', { name: '搜索本项目会话', exact: true })
+    await search.fill('材料')
+    await expect(search).toBeFocused()
+    state.release()
+    // The real hidden preview proves both restored tab selection and snapshot hydration finished.
+    await expect(page.locator('.preview-pane .surface-view-title')).toHaveText(snapshot.spec.title!)
+    await expect(page.locator('.app-body')).toHaveAttribute('data-active-pane', 'context')
+    await expect(page.locator('.left-nav')).toBeVisible()
+    await expect(page.locator('.main')).toBeHidden()
+    await expect(page.locator('.right-panel')).toBeHidden()
+    await expect(search).toHaveValue('材料')
+    await expect(search).toBeFocused()
+    expect(state.errors).toEqual([])
+  })
+
+  test(`preserves explicit work, Surface, document and return navigation at ${width}px`, async ({ page }) => {
+    await page.setViewportSize({ width, height: 900 })
+    const state = await fixture(page)
+    state.release()
+    await expect(page.locator('.preview-pane .surface-view-title')).toHaveText(snapshot.spec.title!)
+    await page.getByRole('button', { name: '打开上下文', exact: true }).click()
+    await page.getByRole('button', { name: '打开工作', exact: true }).click()
+    await expect(page.locator('.app-body')).toHaveAttribute('data-active-pane', 'work')
+    await expect(page.locator('.right-panel')).toBeVisible()
+    await expect(page.locator('.left-nav')).toBeHidden()
+    await page.getByRole('button', { name: '打开上下文', exact: true }).click()
+    await page.getByRole('button', { name: '打开文件', exact: true }).click()
+    await expect(page.locator('.app-body')).toHaveAttribute('data-active-pane', 'files')
+    await page.getByRole('button', { name: '返回文件列表', exact: true }).click()
+    await page.locator(`[data-surface-row="${snapshot.identity.surfaceId}"]`).click()
+    await expect(page.locator('.preview-pane .surface-view-title')).toHaveText(snapshot.spec.title!)
+    // Surface doc-ref uses the existing document bridge, which opens the same preview.
+    await page.locator('.preview-pane').getByRole('button', { name: artifact.id, exact: true }).click()
+    await expect(page.locator('.preview-pane-name')).toHaveText(artifact.name)
+    await expect(page.locator('.preview-pane-body')).toContainText('原始材料的阅读范围')
+    await page.getByRole('button', { name: '展开预览', exact: true }).click()
+    await expect(page.locator('.right-panel')).toHaveClass(/expanded/)
+    await page.getByRole('button', { name: '返回对话', exact: true }).click()
+    await expect(page.locator('.app-body')).toHaveAttribute('data-active-pane', 'conversation')
+    await expect(page.locator('.main')).toBeVisible()
+    await page.getByRole('button', { name: '打开上下文', exact: true }).click()
+    await page.setViewportSize({ width: 1440, height: 900 })
+    await expect(page.locator('.main')).toBeVisible()
+    await page.setViewportSize({ width, height: 900 })
+    await expect(page.locator('.app-body')).toHaveAttribute('data-active-pane', 'conversation')
+    await expect(page.locator('.left-nav')).toBeHidden()
+    expect(state.errors).toEqual([])
+  })
+
+  test(`opens a workspace document while context overlays the selected files pane at ${width}px`, async ({ page }) => {
+    await page.setViewportSize({ width, height: 900 })
+    const state = await fixture(page)
+    state.release()
+    await expect(page.locator('.preview-pane .surface-view-title')).toHaveText(snapshot.spec.title!)
+    await page.getByRole('button', { name: '打开文件', exact: true }).click()
+    await page.getByRole('button', { name: '打开上下文', exact: true }).click()
+    await page.locator('.left-nav').getByRole('button', { name: /材料工作区/ }).click()
+    const workspace = page.getByRole('dialog', { name: '材料工作区', exact: true })
+    await workspace.getByRole('button', { name: artifact.name, exact: true }).click()
+    await page.keyboard.press('Escape')
+    await expect(page.locator('.app-body')).toHaveAttribute('data-active-pane', 'files')
+    await expect(page.locator('.preview-pane-name')).toHaveText(artifact.name)
+    await expect(page.locator('.preview-pane-body')).toContainText('原始材料的阅读范围')
+    expect(state.errors).toEqual([])
+  })
+}
diff --git a/e2e/work-companion.playwright.ts b/e2e/work-companion.playwright.ts
new file mode 100644
index 0000000..d3e7211
--- /dev/null
+++ b/e2e/work-companion.playwright.ts
@@ -0,0 +1,228 @@
+import { test, expect, type Page } from '@playwright/test'
+import type { ActivityCard, Artifact, Conversation, StreamEvent } from '../src/contracts'
+
+test.skip(!process.env.WORK_COMPANION_BROWSER, 'Run explicitly against the task-owned UI preview')
+
+const stamp = '2026-10-12T10:00:00Z'
+const project = { id: 'p1', name: '产品升级计划', createdAt: stamp, updatedAt: stamp }
+const conversations: Conversation[] = [
+  { id: 'c1', projectId: 'p1', title: '整理项目材料', createdAt: stamp, updatedAt: stamp },
+  { id: 'c2', projectId: 'p1', title: '讨论本周工作', createdAt: stamp, updatedAt: stamp },
+]
+const artifact: Artifact = { id: 'doc1', projectId: 'p1', name: '材料整理摘要.md', kind: 'markdown', size: 64, createdAt: stamp, updatedAt: stamp }
+function work(id: string, status: ActivityCard['status'], over: Partial<ActivityCard> = {}): ActivityCard {
+  return { id, status, projectId: 'p1', conversationId: 'c1', kind: 'progress', title: '整理项目材料', createdAt: stamp, updatedAt: stamp, ...over }
+}
+const progress = work('work1', 'active', { body: [{ type: 'kv', kv: [
+  ['状态', '进行中'], ['正在做', '核对会议结论'], ['当前发现', '两份材料的时间安排需要核对'], ['剩余', '评审意见仍待核查'], ['材料键', 'private-material-key'],
+] }] })
+const confirmation = work('confirm1', 'action_required', { kind: 'confirm', title: '生成项目草稿',
+  body: [{ type: 'markdown', markdown: '依据三份材料新增一份草稿，保留原件，不对外发送' }],
+  actions: [{ id: 'confirm', label: '确认生成', style: 'primary' }, { id: 'cancel', label: '暂不生成' }],
+})
+
+async function fixture(page: Page, initialCards: ActivityCard[] = [progress], fontSize = 14) {
+  let cards = [...initialCards]
+  let actionCount = 0
+  let releaseAction: (() => void) | undefined
+  let holdAction = false
+  let sent: { text: string; attachmentIds: string[] } | undefined
+  let uploadNumber = 0
+  const errors: string[] = []
+  page.on('pageerror', error => errors.push(error.message))
+  await page.addInitScript(({ fontSize }) => {
+    localStorage.setItem('as.conv', 'c1')
+    localStorage.setItem('as.ui', JSON.stringify({ theme: 'light', fontSize, rightCollapsed: true, leftWidth: 260, rightWidth: 360 }))
+    const streams: { url: string; emit: (event: unknown) => void }[] = []
+    class TestEventSource {
+      onopen: (() => void) | null = null
+      onerror = null
+      onmessage: ((event: { data: string }) => void) | null = null
+      listeners: Record<string, ((event: { data: string }) => void)[]> = {}
+      constructor(public url: string) { streams.push(this); queueMicrotask(() => this.onopen?.()) }
+      addEventListener(type: string, callback: (event: { data: string }) => void) { (this.listeners[type] ??= []).push(callback) }
+      emit(event: unknown) {
+        const value = event as { type: string }
+        for (const callback of this.listeners[value.type] ?? []) callback({ data: JSON.stringify(event) })
+      }
+      close() {}
+    }
+    Object.assign(window, { EventSource: TestEventSource, __workStreams: streams })
+  }, { fontSize })
+  await page.route('**/api/**', async route => {
+    const request = route.request()
+    const url = new URL(request.url())
+    const path = url.pathname
+    let body: unknown = []
+    if (path === '/api/health') body = { ok: true }
+    else if (path === '/api/me') body = { owner: 'reader', name: '林老师', auth: false, isAdmin: false }
+    else if (path === '/api/projects') body = [project]
+    else if (path === '/api/conversations') body = conversations
+    else if (path === '/api/projects/p1/conversations' && request.method() === 'POST') body = conversations[1]
+    else if (/^\/api\/conversations\/c[12]$/.test(path)) {
+      const id = path.split('/').at(-1)!
+      body = { conversation: conversations.find(c => c.id === id), messages: id === 'c1' ? [
+        { id: 'm1', conversationId: id, role: 'user', parts: [{ type: 'text', text: '请整理这三份材料，看看需要优先处理什么' }], createdAt: stamp },
+        { id: 'm2', conversationId: id, role: 'assistant', parts: [{ type: 'text', text: '先核对时间安排，再补齐验收条件。其他内容仍在整理。' }], createdAt: stamp },
+      ] : [], runs: [], activeHitl: [], lastSeq: 10 }
+    } else if (path === '/api/conversations/c1/cards') body = { cards }
+    else if (path === '/api/conversations/c2/cards') body = { cards: [] }
+    else if (path.endsWith('/plan') || path.endsWith('/todos')) body = null
+    else if (path === '/api/projects/p1/artifacts') body = [artifact]
+    else if (path === '/api/artifacts/doc1/content') {
+      await route.fulfill({ status: 200, contentType: 'text/markdown', body: '# 材料整理摘要\n\n已整理两份材料，评审意见仍待核对' }); return
+    } else if (path === '/api/settings') body = { user: { runtime: { mock: false } }, project: {}, effective: {}, schema: [] }
+    else if (path === '/api/profiles') body = [{ id: 'default', name: '工作助手', model: {}, tools: { allow: [] }, context: { maxHistoryMessages: 20 }, hitl: { askOnAmbiguity: true }, systemPrompt: '' }]
+    else if (path === '/api/projects/p1/uploads') body = { artifactId: 'upload' + ++uploadNumber, filename: '材料.txt', size: 16 }
+    else if (/\/messages$/.test(path) && request.method() === 'POST') {
+      sent = request.postDataJSON()
+      body = { message: { id: 'sent', conversationId: 'c1', role: 'user', parts: [{ type: 'text', text: sent?.text ?? '' }], createdAt: stamp }, run: { id: 'run1', conversationId: 'c1', projectId: 'p1', kind: 'conversation', status: 'running', createdAt: stamp } }
+    } else if (path === '/api/cards/confirm1/actions/confirm') {
+      actionCount++
+      if (holdAction) await new Promise<void>(resolve => { releaseAction = resolve })
+      cards = cards.map(card => card.id === 'confirm1' ? { ...card, status: 'resolved' } : card)
+      body = { card: cards.find(card => card.id === 'confirm1') }
+    }
+    await route.fulfill({ status: 200, contentType: 'application/json', body: JSON.stringify(body) })
+  })
+  await page.goto('/')
+  await expect(page.locator('.chat-title')).toHaveText('整理项目材料')
+  if (initialCards.length) await expect(page.locator('[data-conversation-work]')).toBeVisible()
+  return { errors, get actionCount() { return actionCount }, get sent() { return sent }, hold() { holdAction = true }, release() { releaseAction?.() },
+    async emit(type: StreamEvent['type'], payload: unknown, seq: number) {
+      await page.evaluate(({ type, payload, seq }) => {
+        const win = window as typeof window & { __workStreams: { url: string; emit: (e: unknown) => void }[] }
+        const stream = win.__workStreams.findLast(s => s.url.includes('conversationId=c1'))
+        if (!stream) throw Error('conversation stream unavailable')
+        stream.emit({ type, payload, seq, conversationId: 'c1', ts: '2026-10-12T10:00:00Z', v: 1 })
+      }, { type, payload, seq })
+    },
+  }
+}
+
+test('keeps real summary and details accessible with right pane closed', async ({ page }) => {
+  const state = await fixture(page)
+  await expect(page.locator('.right-panel')).toBeHidden()
+  await expect(page.getByText('核对会议结论', { exact: true }).first()).toBeVisible()
+  await expect(page.getByText('private-material-key')).toHaveCount(0)
+  await page.locator('[data-conversation-work]').getByRole('button', { name: '查看依据与范围', exact: true }).click()
+  await page.locator('[data-conversation-work]').getByRole('button', { name: '查看执行记录', exact: true }).click()
+  await expect(page.locator('[data-conversation-work]').getByText('private-material-key')).toBeVisible()
+  await state.emit('card.status', { cardId: 'work1', status: 'done' }, 12)
+  await state.emit('card.status', { cardId: 'work1', status: 'active' }, 11)
+  await expect(page.locator('[data-conversation-work] .acard-status')).toHaveText('已完成')
+  expect(state.errors).toEqual([])
+})
+
+test('keeps one expanded ordinary summary when the desktop work pane opens', async ({ page }) => {
+  await page.setViewportSize({ width: 1440, height: 960 })
+  const state = await fixture(page)
+  await page.getByRole('button', { name: '打开工作', exact: true }).click()
+  await expect(page.locator('.right-panel .acard')).toHaveCount(1)
+  await expect(page.locator('[data-conversation-work] .acard')).toHaveCount(0)
+  await expect(page.locator('[data-conversation-work]').getByRole('button', { name: /整理项目材料 · 查看摘要/ })).toBeVisible()
+  if (process.env.WORK_COMPANION_SCREENSHOT) await page.screenshot({ path: process.env.WORK_COMPANION_SCREENSHOT, fullPage: true })
+  expect(state.errors).toEqual([])
+})
+
+test('preserves the selected material, physical scroll and focus when background work finishes', async ({ page }) => {
+  await page.setViewportSize({ width: 1440, height: 960 })
+  const tabbed = work('work1', 'active', { body: [...progress.body!, {
+    type: 'tabs', id: 'materials', tabs: { tabs: [
+      { id: 'first', label: '第一份材料', nodes: [{ type: 'markdown', markdown: '第一份材料的范围' }] },
+      { id: 'second', label: '第二份材料', nodes: [{ type: 'markdown', markdown: Array.from({ length: 70 }, (_, i) => `待核对事项 ${i + 1}`).join('\n\n') }] },
+    ] },
+  }] })
+  const state = await fixture(page, [tabbed, work('peer', 'active', { body: [] })])
+  await page.getByRole('button', { name: '打开工作', exact: true }).click()
+  const card = page.locator('.right-panel [data-card-id="work1"]')
+  await card.getByRole('button', { name: '查看依据与范围', exact: true }).click()
+  const tab = card.getByRole('tab', { name: '第二份材料', exact: true })
+  await tab.click()
+  await tab.focus()
+  const details = card.locator('.acard-detail-body')
+  await expect.poll(() => details.evaluate(element => element.clientHeight)).toBe(420)
+  const physical = await details.evaluate(element => {
+    Object.assign(window, { __workReading: element })
+    element.scrollTop = 137
+    return { height: element.clientHeight, scrollHeight: element.scrollHeight, top: element.scrollTop }
+  })
+  expect(physical.scrollHeight).toBeGreaterThan(physical.height)
+  expect(physical.top).toBe(137)
+  await state.emit('card.status', { cardId: 'work1', status: 'done' }, 12)
+  await expect(card.locator('.acard-status')).toHaveText('已完成')
+  await expect(tab).toHaveAttribute('aria-selected', 'true')
+  expect(await details.evaluate(element => ({
+    retained: (window as typeof window & { __workReading: Element }).__workReading === element,
+    top: element.scrollTop,
+  }))).toEqual({ retained: true, top: 137 })
+  expect(await tab.evaluate(element => document.activeElement === element)).toBe(true)
+  expect(state.errors).toEqual([])
+})
+
+test('shares submitting feedback between conversation and work confirmations', async ({ page }) => {
+  const state = await fixture(page, [confirmation])
+  await page.getByRole('button', { name: '打开工作', exact: true }).click()
+  state.hold()
+  await page.locator('[data-conversation-work]').getByRole('button', { name: '确认生成', exact: true }).click()
+  await expect(page.locator('.right-panel').getByRole('button', { name: '确认生成', exact: true })).toBeDisabled()
+  await expect(page.locator('[data-conversation-work]').getByRole('button', { name: '暂不生成', exact: true })).toBeDisabled()
+  expect(state.actionCount).toBe(1)
+  state.release()
+  await expect(page.getByRole('button', { name: '确认生成', exact: true })).toHaveCount(0)
+  expect(state.errors).toEqual([])
+})
+
+test('opens the one file preview and preserves reading during background updates', async ({ page }) => {
+  const result = work('result1', 'done', { kind: 'result', title: '材料摘要已准备好', body: [{ type: 'doc-ref', docId: 'doc1' }] })
+  const state = await fixture(page, [result])
+  await page.locator('[data-conversation-work]').getByText(artifact.name, { exact: true }).click()
+  await expect(page.locator('.preview-pane-name')).toHaveText(artifact.name)
+  await expect(page.locator('.preview-pane-body')).toContainText('评审意见仍待核对')
+  await state.emit('surface.updated', { identity: { surfaceId: 'new-page', owner: 'reader', pluginId: 'generative-ui', conversationId: 'c1' }, revision: 1, activationEpoch: 0, compat: { schemaVersion: 1, catalogVersion: '1' }, spec: { title: '新任务页面', nodes: [] } }, 11)
+  await expect(page.locator('.preview-pane-name')).toHaveText(artifact.name)
+  await page.getByRole('button', { name: '展开预览', exact: true }).click()
+  await expect(page.locator('.main')).toBeHidden()
+  await page.getByRole('button', { name: '返回对话', exact: true }).click()
+  await expect(page.locator('.main')).toBeVisible()
+  expect(state.errors).toEqual([])
+})
+
+test('sends three attachments without text and states foreground queueing truthfully', async ({ page }) => {
+  const state = await fixture(page, [])
+  await page.locator('input[type=file]').first().setInputFiles([
+    { name: '会议纪要.txt', mimeType: 'text/plain', buffer: Buffer.from('会议内容') },
+    { name: '需求说明.txt', mimeType: 'text/plain', buffer: Buffer.from('需求内容') },
+    { name: '评审意见.txt', mimeType: 'text/plain', buffer: Buffer.from('评审内容') },
+  ])
+  await expect(page.locator('.attach-chip')).toHaveCount(3)
+  await page.getByRole('button', { name: '发送', exact: true }).click()
+  await expect.poll(() => state.sent?.attachmentIds.length).toBe(3)
+  expect(state.sent?.text).toBe('')
+  await page.getByRole('textbox', { name: '工作目标或消息', exact: true }).fill('请优先核对时间安排')
+  await expect(page.getByRole('button', { name: '加入队列', exact: true })).toBeEnabled()
+  await page.getByRole('button', { name: '加入队列', exact: true }).click()
+  await expect(page.getByText('请优先核对时间安排', { exact: true })).toBeVisible()
+  await expect(page.locator('.input-status')).toContainText('排队')
+  expect(state.errors).toEqual([])
+})
+
+for (const width of [1440, 1024, 736, 390, 320]) {
+  test(`keeps navigation and key actions usable at ${width}px with large UI type`, async ({ page }) => {
+    await page.setViewportSize({ width, height: 960 })
+    const state = await fixture(page, [progress], 18)
+    await page.getByRole('button', { name: '打开工作', exact: true }).click()
+    await expect(page.locator('.right-panel')).toBeVisible()
+    await expect(page.locator('.right-panel').getByText('评审意见仍待核查')).toBeVisible()
+    if (width < 1024) {
+      await page.getByRole('button', { name: '返回对话', exact: true }).click()
+      await expect(page.locator('.main')).toBeVisible()
+      await page.getByRole('button', { name: '打开上下文', exact: true }).click()
+      await expect(page.getByRole('button', { name: '新建对话', exact: true })).toBeVisible()
+      await page.getByRole('button', { name: '返回对话', exact: true }).click()
+    }
+    const layout = await page.evaluate(() => ({ width: document.documentElement.clientWidth, scroll: document.documentElement.scrollWidth }))
+    expect(layout.scroll).toBeLessThanOrEqual(layout.width)
+    expect(state.errors).toEqual([])
+  })
+}
diff --git a/src/App.tsx b/src/App.tsx
index ab4dffc..6cf56a9 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -16,6 +16,8 @@ import { SettingsModal } from './components/SettingsModal'
 import { ProjectSettingsModal } from './components/ProjectSettingsModal'
 import { TopBar } from './components/TopBar'
 import { workspaceEntries } from './components/Workspaces'
+import { selectWorkbenchLayout } from './workbenchLayout'
+import './companion-shell.css'
 
 // 布局（三栏工作台）：左（项目与会话）/ 中（对话）/ 第三栏（工作｜文件双入口）。
 // 文件预览不再是独立第四栏——预览在第三栏「文件」入口内，展开态铺满主区。
@@ -24,28 +26,66 @@ const RIGHT_MIN = 280, RIGHT_MAX = 560
 const PREVIEW_MIN = 420, PREVIEW_MAX = 1100
 
 export function App() {
-  useEffect(() => {
-    const h = (e: KeyboardEvent) => workspaceShortcuts(e)
-    window.addEventListener('keydown', h, true)
-    return () => window.removeEventListener('keydown', h, true)
-  }, [])
-
   const ui = useStore(s => s.ui)
   // 预览键与 requestPreview 的落点一致（previewTabsKey）：空态（未选会话）点开
   // 工件也要能进文件入口，否则点击只剩工件弹层关闭、毫无反馈。
   const previewOpen = useStore(s => (s.previewTabs[previewTabsKey(s.currentConvId)]?.length ?? 0) > 0)
+  const previewOpenIntent = useStore(s => s.previewOpenIntent)
   const rightTab = useStore(s => s.ui.rightTab)
   const toast = useStore(s => s.toast)
   const trackerRunId = useStore(s => s.ui.trackerRunId)
   // 文件入口 + 预览标签在场时，第三栏用「阅读档」宽度（420–1100），不受工作档上限约束。
-  const filesWide = rightTab === 'files' && previewOpen
-  const rightPanelWidth = filesWide ? ui.previewWidth : ui.rightWidth
-  const previewExpanded = filesWide && ui.previewExpanded
+  const filesWide = rightTab === 'files' && ui.filesView === 'preview' && previewOpen
+  const [viewportWidth, setViewportWidth] = useState(() => typeof window === 'undefined' ? 1440 : window.innerWidth)
+  const [contextOpen, setContextOpen] = useState(false)
+  const layout = selectWorkbenchLayout({ ...ui, width: viewportWidth, contextOpen, previewOpen })
   const pendingBadge = useStore(s => s.cards.filter(c => c.status === 'action_required').length)
   // authState：checking → login（登录）→ mustchange（首登强制改密）→ ok（放行）。
   const [authState, setAuthState] = useState<'checking' | 'login' | 'mustchange' | 'ok'>('checking')
   const [mustChangeOwner, setMustChangeOwner] = useState('')
 
+  useEffect(() => {
+    const onResize = () => setViewportWidth(window.innerWidth)
+    window.addEventListener('resize', onResize)
+    return () => window.removeEventListener('resize', onResize)
+  }, [])
+
+  // Explicit openings leave mobile context even if pane values match; metadata restores keep the reading choice.
+  useEffect(() => { setContextOpen(false) }, [ui.rightCollapsed, rightTab, ui.filesView, ui.previewExpanded, previewOpenIntent])
+  useEffect(() => { if (!layout.compact) setContextOpen(false) }, [layout.compact])
+
+  const returnToConversation = () => {
+    setContextOpen(false)
+    store.setUI(layout.compact ? { rightCollapsed: true, previewExpanded: false } : { previewExpanded: false })
+  }
+  const openContext = () => {
+    if (!layout.compact) store.toggleLeft()
+    else if (contextOpen) returnToConversation()
+    else setContextOpen(true)
+  }
+  const openWork = () => {
+    setContextOpen(false)
+    store.openInbox()
+    store.setUI({ inboxFilter: 'all', previewExpanded: false })
+  }
+  const openPending = () => { setContextOpen(false); store.focusPending() }
+  const openFiles = () => { setContextOpen(false); store.openFiles() }
+  const conversationOpened = () => { if (layout.compact) returnToConversation() }
+
+  // Keep conversation/context shortcuts available even when their pane is hidden.
+  useEffect(() => {
+    const h = (e: KeyboardEvent) => {
+      if (authState === 'ok' && (e.metaKey || e.ctrlKey)) {
+        const key = e.key.toLowerCase()
+        if (key === 'n') { e.preventDefault(); store.createTask().then(conversationOpened); return }
+        if (key === 'b') { e.preventDefault(); openContext(); return }
+      }
+      workspaceShortcuts(e)
+    }
+    window.addEventListener('keydown', h, true)
+    return () => window.removeEventListener('keydown', h, true)
+  }, [authState, layout.compact, contextOpen])
+
   useEffect(() => {
     ;(async () => {
       try {
@@ -82,10 +122,10 @@ export function App() {
   const onDividerDown = (side: 'left' | 'right') => (e: React.MouseEvent) => {
     e.preventDefault()
     // 右侧分隔条按当前入口选宽度档：文件+预览在场走阅读档，否则工作档。
-    const wide = side === 'right' && rightTab === 'files' && previewOpen
+    const wide = side === 'right' && filesWide
     const key = side === 'left' ? 'leftWidth' : wide ? 'previewWidth' : 'rightWidth'
     drag.current = {
-      side, startX: e.clientX, startW: ui[key], overshoot: false,
+      side, startX: e.clientX, startW: side === 'left' ? layout.leftWidth : layout.rightWidth, overshoot: false,
       min: side === 'left' ? LEFT_MIN : wide ? PREVIEW_MIN : RIGHT_MIN,
       max: side === 'left' ? LEFT_MAX : wide ? PREVIEW_MAX : RIGHT_MAX,
       key,
@@ -115,6 +155,18 @@ export function App() {
     window.addEventListener('mouseup', up)
   }
 
+  const onDividerKey = (side: 'left' | 'right') => (e: React.KeyboardEvent) => {
+    if (e.key !== 'ArrowLeft' && e.key !== 'ArrowRight') return
+    e.preventDefault()
+    const wide = side === 'right' && filesWide
+    const key = side === 'left' ? 'leftWidth' : wide ? 'previewWidth' : 'rightWidth'
+    const min = side === 'left' ? LEFT_MIN : wide ? PREVIEW_MIN : RIGHT_MIN
+    const max = side === 'left' ? LEFT_MAX : wide ? PREVIEW_MAX : RIGHT_MAX
+    const current = side === 'left' ? layout.leftWidth : layout.rightWidth
+    const delta = (e.key === 'ArrowRight' ? 16 : -16) * (side === 'left' ? 1 : -1)
+    store.setUI({ [key]: Math.min(max, Math.max(min, current + delta)) })
+  }
+
   if (authState === 'login') {
     return <LoginPage
       onAuthed={() => setAuthState('ok')}
@@ -132,22 +184,20 @@ export function App() {
 
   const tools = workspaceEntries()
   return (
-    <div className="app">
-      <TopBar />
-      <div className="app-body">
-      {!ui.leftCollapsed ? (
-        <>
-          <div className="left-nav" style={{ width: ui.leftWidth }}>
-            <TaskSidebar />
+    <div className={`app companion-app${layout.compact ? ' compact' : ''}`}>
+      <TopBar compact={layout.compact} activePane={layout.pane} showReturn={layout.previewExpanded}
+        onContext={openContext} onConversation={returnToConversation} onWork={openWork} onFiles={openFiles} />
+      <div className="app-body" data-active-pane={layout.pane}>
+        <aside className={`left-nav${layout.contextCollapsed ? ' collapsed' : ''}`} aria-label="上下文"
+          hidden={!layout.showContext} style={{ width: layout.leftWidth }}>
+          <div className="shell-context-content" hidden={layout.contextCollapsed}>
+            <TaskSidebar onCollapse={layout.compact ? returnToConversation : store.toggleLeft}
+              onConversationOpen={conversationOpened} onFilesOpen={openFiles} onWorkOpen={openPending} />
           </div>
-          <div className="divider" onMouseDown={onDividerDown('left')} onDoubleClick={store.toggleLeft} title="拖动调整宽度；继续向左超过最小宽度后松开可收起；双击切换" />
-        </>
-      ) : (
-        <div className="left-nav collapsed" style={{ width: 52 }}>
-          <div className="icon-only">
+          <div className="icon-only" hidden={!layout.contextCollapsed}>
             <button title="展开侧栏（⌘B）" onClick={store.toggleLeft}><Icon name="panel-left" /></button>
-            <button title="新建任务（⌘N）" onClick={() => store.createTask()}><Icon name="plus" /></button>
-            <button title="收件箱" onClick={() => store.focusPending()}><Icon name="inbox" />
+            <button title="新建对话（⌘N）" onClick={() => store.createTask()}><Icon name="plus" /></button>
+            <button title="工作" onClick={openWork}><Icon name="inbox" />
               {pendingBadge > 0 && <span className="rail-badge" data-testid="rail-badge">{pendingBadge}</span>}
             </button>
             {tools.map(entry => (
@@ -155,31 +205,24 @@ export function App() {
             ))}
             <button title="设置" onClick={() => store.openSettings(true)}><Icon name="settings" /></button>
           </div>
-        </div>
-      )}
+        </aside>
+        {layout.leftDivider && <div className="divider" role="separator" tabIndex={0} aria-label="调整上下文宽度" aria-orientation="vertical"
+          aria-valuemin={LEFT_MIN} aria-valuemax={LEFT_MAX} aria-valuenow={Math.round(layout.leftWidth)}
+          onKeyDown={onDividerKey('left')} onMouseDown={onDividerDown('left')} onDoubleClick={store.toggleLeft}
+          title="拖动或用方向键调整宽度；双击收起" />}
 
-      <div className="main" hidden={previewExpanded}>
-        <Conversation />
-      </div>
+        <main className="main" hidden={!layout.showConversation} aria-label="对话">
+          <Conversation />
+        </main>
 
-      {!ui.rightCollapsed ? (
-        <>
-          <div className="divider" onMouseDown={onDividerDown('right')} onDoubleClick={store.toggleRight} title="拖动调整宽度；双击收起" />
-          <div className={`right-panel mk-panel-grow${previewExpanded ? ' expanded' : ''}`}
-            style={previewExpanded ? undefined : { width: rightPanelWidth }}>
-            <Workbench />
-          </div>
-        </>
-      ) : (
-        <div className="right-panel collapsed" style={{ width: 44 }}>
-          <div className="icon-only">
-            <button title="展开右栏" onClick={store.toggleRight}>◧
-              {pendingBadge > 0 && <span className="rail-badge" data-testid="rail-badge">{pendingBadge}</span>}
-            </button>
-            <button title="文件（搜索、预览、编辑、下载）" onClick={() => store.openFiles()}><Icon name="folder" size={16} /></button>
-          </div>
-        </div>
-      )}
+        {layout.rightDivider && <div className="divider" role="separator" tabIndex={0} aria-label="调整工作或文件宽度" aria-orientation="vertical"
+          aria-valuemin={filesWide ? PREVIEW_MIN : RIGHT_MIN} aria-valuemax={filesWide ? PREVIEW_MAX : RIGHT_MAX}
+          aria-valuenow={Math.round(layout.rightWidth)} onKeyDown={onDividerKey('right')}
+          onMouseDown={onDividerDown('right')} onDoubleClick={store.toggleRight} title="拖动或用方向键调整宽度；双击收起" />}
+        <aside className={`right-panel mk-panel-grow${layout.previewExpanded ? ' expanded' : ''}`}
+          aria-label={rightTab === 'files' ? '文件' : '工作'} hidden={!layout.showRight} style={{ width: layout.rightWidth }}>
+          <Workbench />
+        </aside>
       </div>
 
       <Workspaces />
diff --git a/src/companion-conversation.css b/src/companion-conversation.css
new file mode 100644
index 0000000..5402689
--- /dev/null
+++ b/src/companion-conversation.css
@@ -0,0 +1,84 @@
+.work-companion-chat .chat-header {
+  position: relative;
+  display: grid;
+  grid-template-columns: minmax(0, 1fr) auto auto;
+  gap: 12px;
+  padding: 12px 20px;
+}
+.work-companion-chat .chat-title { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+.work-companion-chat .chat-header > .mk-col-root { position: relative; }
+.work-companion-chat .chat-header > .mk-col-root > .mk-col {
+  position: absolute;
+  right: 0;
+  top: calc(100% + 8px);
+  width: min(28rem, calc(100vw - 40px));
+  z-index: 30;
+}
+.companion-settings-trigger, .companion-operation-trigger {
+  display: inline-flex;
+  align-items: center;
+  gap: 8px;
+  padding: 4px 8px;
+  color: var(--text-dim);
+  font-size: var(--fs-ui-sm);
+  border-radius: var(--radius-sm);
+}
+.companion-settings-trigger:hover, .companion-operation-trigger:hover { background: var(--bg-hover); color: var(--text); }
+.companion-settings-body {
+  padding: 16px;
+  background: var(--bg-raised);
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  box-shadow: var(--shadow-md);
+}
+.companion-setting { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-bottom: 12px; color: var(--text); font-size: var(--fs-ui-caption); }
+.companion-setting > span:first-child { flex: 1; min-width: 8rem; }
+.companion-setting select { max-width: 100%; padding: 4px 8px; background: var(--bg-panel); color: var(--text); border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: var(--fs-ui-caption); }
+.companion-setting .session-note { flex: 1 1 100%; min-width: 0; width: 100%; }
+.companion-setting-note { flex: 1 1 100%; margin: 0; color: var(--text-dim); font-size: var(--fs-ui-sm); line-height: 1.6; }
+.work-companion-chat .chat-body { padding: 24px clamp(16px, 5vw, 64px); }
+.work-companion-chat .input-bar { padding: 8px clamp(16px, 5vw, 64px) 16px; }
+.work-companion-chat .input-row { flex-direction: column; align-items: stretch; padding: 12px; box-shadow: none; }
+.work-companion-chat .input-row textarea { box-sizing: border-box; width: 100%; min-width: 0; padding: 4px; line-height: 1.6; font-size: var(--fs-ui-base); }
+.companion-compose-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; min-width: 0; }
+.companion-compose-spacer { flex: 1; }
+.companion-add-material { position: relative; display: inline-flex; align-items: center; gap: 4px; padding: 4px; cursor: pointer; color: var(--text-dim); font-size: var(--fs-ui-caption); border-radius: var(--radius-sm); }
+.companion-add-material:hover { background: var(--bg-hover); color: var(--text); }
+.companion-add-material:focus-within { outline: 2px solid var(--accent); outline-offset: 2px; }
+.companion-file-input { position: absolute; width: 1px; height: 1px; padding: 0; margin: 0; overflow: hidden; clip-path: inset(50%); }
+.companion-input-hint { font-size: var(--fs-ui-sm); color: var(--text-dim); }
+.companion-operation-trigger { margin-bottom: 8px; }
+.companion-operation-body { padding: 12px; margin-bottom: 12px; border: 1px solid var(--border-soft); border-radius: var(--radius); background: var(--bg-panel); }
+.companion-operation-body .companion-setting { margin-bottom: 8px; }
+.work-companion-chat .input-status { flex-wrap: wrap; gap: 4px 8px; padding: 8px 0; line-height: 1.5; }
+.work-companion-chat .input-status-note { color: var(--text-dim); font-size: var(--fs-ui-sm); }
+.companion-reconnect, .companion-upload-status, .companion-action-feedback { padding: 8px 0; color: var(--text-dim); font-size: var(--fs-ui-caption); line-height: 1.5; }
+.companion-upload-error { padding: 8px 0; color: var(--err-text); font-size: var(--fs-ui-caption); overflow-wrap: anywhere; }
+.companion-remove-material { display: inline-flex; align-items: center; justify-content: center; padding: 4px; color: var(--text-dim); background: transparent; border: 0; border-radius: var(--radius-xs); cursor: pointer; }
+.companion-remove-material:hover { background: var(--bg-hover); color: var(--text); }
+.work-companion-chat .attach-chip { max-width: 100%; overflow-wrap: anywhere; }
+.companion-empty { min-height: 240px; height: 100%; text-align: center; line-height: 1.7; }
+.companion-empty-title { color: var(--text); font-size: var(--fs-ui-xl); }
+.companion-examples { display: grid; gap: 8px; width: min(100%, 32rem); margin-top: 12px; }
+.companion-example { padding: 12px 16px; background: var(--bg-panel); border: 1px solid var(--border-soft); border-radius: var(--radius); color: var(--text-dim); font: inherit; text-align: left; cursor: pointer; }
+.companion-example:hover { color: var(--text); background: var(--bg-hover); }
+.conversation-work { margin: 24px 0 16px; min-width: 0; }
+.conversation-work-heading { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; margin-bottom: 12px; color: var(--text-dim); font-size: var(--fs-ui-caption); }
+.conversation-work-heading > span:first-child { color: var(--text); font-weight: 600; }
+.conversation-work-current, .conversation-work-history { display: grid; gap: 12px; min-width: 0; }
+.conversation-work-more { padding: 12px 0; color: var(--text-dim); font-size: var(--fs-ui-caption); }
+.conversation-work .acard { margin: 0; }
+.work-companion-chat .live-bar { flex-wrap: wrap; }
+.work-companion-chat .part-error-detail, .work-companion-chat .hitl-detail { overflow-wrap: anywhere; white-space: pre-wrap; }
+@media (max-width: 540px) {
+  .work-companion-chat .chat-header { padding: 12px 16px; gap: 8px; }
+  .companion-input-hint { display: none; }
+  .companion-empty { min-height: 200px; }
+  .work-companion-chat .hitl-choices { grid-template-columns: minmax(0, 1fr); }
+}
+
+.work-companion-chat .msg.user .bubble { background: var(--bg-active); }
+.companion-message-copy { padding: 4px 8px; border: 0; background: transparent; color: var(--text-dim); font-size: var(--fs-ui-caption); border-radius: var(--radius-sm); cursor: pointer; }
+.companion-message-copy:hover { background: var(--bg-hover); color: var(--text); }
+.companion-message-actions { display: flex; flex-wrap: wrap; gap: 8px; padding: 8px 0; }
+.work-companion-chat .msg-tools { gap: 4px; }
diff --git a/src/companion-shell.css b/src/companion-shell.css
new file mode 100644
index 0000000..3ee248d
--- /dev/null
+++ b/src/companion-shell.css
@@ -0,0 +1,130 @@
+/* Responsive host chrome; the canonical theme and UI type scale stay in @ui. */
+.app.companion-app {
+  height: 100dvh;
+  min-width: 0;
+  max-width: 100%;
+}
+
+.companion-app .app-body { min-width: 0; overflow: hidden; }
+.companion-app .left-nav,
+.companion-app .main,
+.companion-app .right-panel { min-height: 0; max-width: 100%; overflow: hidden; }
+.companion-app .left-nav { transition: none; }
+.companion-app .left-nav[hidden],
+.companion-app .right-panel[hidden],
+.companion-app .shell-context-content[hidden],
+.companion-app .icon-only[hidden] { display: none !important; }
+
+.shell-context-content { display: flex; flex-direction: column; flex: 1; min-height: 0; min-width: 0; }
+.companion-app .companion-topbar { height: auto; min-height: 44px; gap: 8px; padding: 4px 12px; }
+.topbar-identity { display: flex; align-items: center; gap: 8px; min-width: 0; }
+.companion-topbar .topbar-name { font-size: var(--fs-ui-caption); white-space: nowrap; }
+.companion-topbar .brand-mark {
+  background: var(--primary-sidebar);
+  color: var(--primary-sidebar-foreground);
+  box-shadow: none;
+  border-radius: var(--radius-sm) !important;
+}
+.shell-navigation { display: flex; align-items: center; gap: 4px; }
+.shell-nav-button,
+.shell-return {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  min-height: 32px;
+  padding: 4px 12px;
+  border: none;
+  border-radius: var(--radius-sm);
+  background: none;
+  color: var(--text-sidebar-dim);
+  font-size: var(--fs-ui-caption);
+  cursor: pointer;
+  white-space: nowrap;
+}
+.shell-nav-button:hover,
+.shell-return:hover { background: var(--bg-hover); color: var(--text-sidebar); }
+.shell-nav-button[aria-pressed='true'] { background: var(--bg-active); color: var(--text-sidebar); }
+.shell-nav-button svg,
+.shell-return svg { flex: none; }
+.shell-back-icon { transform: rotate(180deg); }
+.shell-pending {
+  padding: 0 4px;
+  border-radius: var(--radius-xs);
+  background: var(--bg-active);
+  color: var(--text-sidebar);
+  font-size: var(--fs-ui-xs);
+  font-variant-numeric: tabular-nums;
+}
+
+.companion-app .tsb-brand { gap: 4px; padding: 16px 12px 8px; }
+.companion-app .tsb-projrow { min-height: 36px; height: auto; border-color: transparent; background: none; padding: 4px 8px; }
+.companion-app .tsb-projrow:hover { background: var(--bg-hover); }
+.companion-app .tsb-projrow-name { flex: 1; }
+.companion-app .tsb-projrow-stage { max-width: 40%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text-dim); border-radius: var(--radius-sm); }
+.companion-app .tsb-iconbtn { width: 32px; height: 32px; flex: none; }
+.companion-app .tsb-actions { padding: 8px 12px 12px; gap: 12px; }
+.companion-app .tsb-newtask { min-height: 40px; height: auto; box-shadow: none; transition: none; }
+.companion-app .tsb-newtask-main { justify-content: center; padding: 8px 12px; }
+.companion-app .tsb-newtask-caret { width: 36px; flex: none; }
+.companion-app .tsb-search { min-height: 36px; height: auto; padding: 8px 12px; }
+.companion-app .tsb-orgrow { padding-bottom: 4px; }
+.companion-app .tsb-task { min-height: 40px; height: auto; gap: 4px; transition: none; }
+.companion-app .tsb-task-open {
+  display: flex;
+  align-items: center;
+  flex: 1;
+  min-width: 0;
+  gap: 8px;
+  min-height: 40px;
+  padding: 4px 0;
+  border: none;
+  background: none;
+  color: inherit;
+  text-align: left;
+  cursor: pointer;
+}
+.companion-app .tsb-task-open > svg { flex: none; }
+.companion-app .tsb-task-tm { color: var(--text-dim); }
+.companion-app .tsb-task:focus-within .tsb-row-acts { display: inline-flex; }
+.companion-app .tsb-task:focus-within .tsb-task-tm { display: none; }
+.companion-app .tsb-row-menu {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  width: 32px;
+  height: 32px;
+  flex: none;
+  padding: 0;
+  border: none;
+  border-radius: var(--radius-sm);
+  background: none;
+  color: var(--text-dim);
+  cursor: pointer;
+}
+.companion-app .tsb-row-menu:hover { background: var(--bg-hover); color: var(--text); }
+.companion-app .tsb-bottom { padding: 8px 12px; gap: 4px; }
+.companion-app .tsb-tool { min-height: 36px; }
+.companion-app .tsb-avatar { background: var(--bg-active); color: var(--text); box-shadow: none; border-radius: var(--radius-full); }
+.companion-app .tsb-user-sub { color: var(--text-dim); }
+.companion-app .tsb-user { min-height: 44px; height: auto; }
+.companion-app .tsb-menu {
+  min-width: min(216px, calc(100vw - 16px));
+  max-width: min(360px, calc(100vw - 16px));
+  max-height: calc(100dvh - 16px);
+  overflow-y: auto;
+}
+.companion-app .tsb-mi { overflow-wrap: anywhere; }
+
+.companion-app.compact .companion-topbar { flex-wrap: wrap; padding: 8px; }
+.companion-app.compact .shell-navigation { width: 100%; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); }
+.companion-app.compact .shell-nav-button { min-width: 0; min-height: 40px; flex-wrap: wrap; gap: 0 4px; padding: 4px; }
+.companion-app.compact .shell-nav-button > svg { display: none; }
+.companion-app.compact .shell-return { min-height: 36px; padding: 4px 8px; font-size: var(--fs-ui-sm); }
+.companion-app.compact .left-nav,
+.companion-app.compact .main,
+.companion-app.compact .right-panel { flex: 1 1 100%; width: 100%; }
+.companion-app.compact .tsb-tool { min-height: 40px; }
+.companion-app.compact .tsb-footer { padding: 8px 12px; }
+.companion-app.compact .tsb-row-acts,
+.companion-app.compact .tsb-task:focus-within .tsb-row-acts { display: none; }
diff --git a/src/components/ArtifactsPanel.tsx b/src/components/ArtifactsPanel.tsx
index d570cd8..3466dd4 100644
--- a/src/components/ArtifactsPanel.tsx
+++ b/src/components/ArtifactsPanel.tsx
@@ -59,7 +59,7 @@ export function ArtifactsPanel() {
         </div>
       )}
       {artifacts.length === 0
-        ? <div className="empty-note">暂无文件——上传附件或让模型产出文档（mock：#doc）；这里可浏览、预览、下载</div>
+        ? <div className="empty-note">暂无文件，可添加材料或在对话中生成文档</div>
         : visible.length === 0
           ? <div className="empty-note">没有匹配「{q}」的文件</div>
           : groups.map(g => g.versions.length === 1
diff --git a/src/components/Conversation.tsx b/src/components/Conversation.tsx
index 72b4948..2cbd1a6 100644
--- a/src/components/Conversation.tsx
+++ b/src/components/Conversation.tsx
@@ -13,6 +13,8 @@ import { UIRenderer, InlineConfirmCard, hasOpenConfirm, CardAnchor } from '@ui'
 import { docBridge } from './Workbench'
 import { splitTimeline, artifactIcon, humanSize, artifactIdsIn, markMissingArtifacts, dedupeDeliverables, foldRunErrors, processSummary, humanError } from '../messageparts'
 import { ProcessTimeline } from './ProcessTimeline'
+import { ConversationWork } from './ConversationWork'
+import '../companion-conversation.css'
 
 function hasFiles(dt: DataTransfer | null): boolean {
   return !!dt && Array.from(dt.types).includes('Files')
@@ -28,9 +30,7 @@ function PartView({ part, live }: { part: Part; live?: boolean | null }) {
       return <SafeMarkdown className={live ? 'part-text cursor-blink' : 'part-text'} breaks
         markdown={markMissingArtifacts(part.text ?? '', id => !!findArtifact(id))} />
     case 'thinking':
-      // 流式期间展开可实时看到思考；run 终态后收进过程折叠区，默认收起。
-      //（此单件形态用于过程组之外散落的思考；组内思考由 ProcessParts 渲染。）
-      return <ThinkingBlock part={part} idKey={part.text?.slice(0, 24) ?? 't'} defaultOpen={!!live} />
+      return null
     case 'tool_call':
       return <span className="tool-chip">🛠 {part.toolCall?.name}</span>
     case 'tool_result': {
@@ -105,18 +105,6 @@ function findCard(id: string) {
   return cardCache[id]
 }
 
-// 思考块（Collapsible 契约）：左线弱色，流式默认展开、终态默认收起；展开态记忆。
-function ThinkingBlock({ part, idKey, defaultOpen }: { part: Part; idKey: string; defaultOpen?: boolean }) {
-  return (
-    <div className="part-thinking">
-      <Collapsible id={`think:${idKey}`} defaultOpen={defaultOpen} triggerClassName="part-thinking-summary"
-        trigger={<><span className="part-thinking-chev">▸</span>思考过程</>}>
-        <div className="part-thinking-body">{part.text}</div>
-      </Collapsible>
-    </div>
-  )
-}
-
 // 交付物卡片：主区域和「预览」打开预览区；下载收进菜单，避免和预览抢同一个按钮。
 function DeliverableCard({ artifact, updates = 0 }: { artifact: { artifactId: string; name: string; kind?: string }; updates?: number }) {
   const [menu, setMenu] = useState(false)
@@ -189,10 +177,14 @@ function useElapsed(startedAt: number): string {
 // 流式状态行（独立组件：计时 hook 只在 live 行挂载期间运转）。
 function LiveBar({ live }: { live: LiveState }) {
   const elapsed = useElapsed(live.startedAt)
+  const phase = livePhaseLabel(live)
+  const label = phase.startsWith('正在编写') ? '正在准备操作'
+    : phase.startsWith('正在运行') ? '正在处理'
+    : phase === '思考中' ? '正在梳理' : phase
   return (
     <span className="live-bar">
       <span className="live-dot" />
-      <span className="mk-sweep">{livePhaseLabel(live)}</span>
+      <span className="mk-sweep">{label}</span>
       <span className="live-elapsed">已工作 {elapsed}</span>
     </span>
   )
@@ -211,15 +203,14 @@ function AssistantMessage({ msg, live, convId }: { msg: Message; live?: LiveStat
   const split = useMemo(() => splitTimeline(parts, finished), [parts, finished])
   const showProcess = showProcessInline(live ?? null, autoCollapse)
   const memKey = `process:${msg.runId || msg.id}`
-  const touched = !!(msg.runId && touchedProcess.has(msg.runId))
+  const touched = touchedProcess.has(memKey)
   const [open, setOpen] = useState(() => {
-    if (live && !touched) return true
     if (touched) return getPersistedOpen(memKey)
     return showProcess
   })
   useEffect(() => {
-    if (live && msg.runId && !touchedProcess.has(msg.runId)) setOpen(true)
-  }, [live, msg.runId])
+    if (!touchedProcess.has(memKey)) setOpen(showProcess)
+  }, [memKey, showProcess])
   const extras = live ? [] : citedArtifactCards(split.final)
   const cards = live ? [] : dedupeDeliverables(split.final)
   const lastText = (() => {
@@ -229,13 +220,13 @@ function AssistantMessage({ msg, live, convId }: { msg: Message; live?: LiveStat
   const streamingText = !!(live && live.phase === 'responding' && lastText >= 0
     && !live.items.some(it => it.kind === 'tool' && it.state !== 'done'))
   const toolCount = split.timeline.filter(p => p.type === 'tool_call').length
-  const headline = live ? livePhaseLabel(live) : processSummary(toolCount, cards.length, run?.createdAt, run?.endedAt)
+  const headline = live ? '执行记录' : `执行记录 · ${processSummary(toolCount, cards.length, run?.createdAt, run?.endedAt)}`
   const timeline = (
     <ProcessTimeline parts={split.timeline} live={!!live} idKey={msg.id}
       renderPart={(part, liveText) => <PartView part={part} live={liveText} />} />
   )
   const toggleProcess = (next: boolean) => {
-    if (msg.runId) touchedProcess.add(msg.runId)
+    touchedProcess.add(memKey)
     setPersistedOpen(memKey, next)
     setOpen(next)
   }
@@ -246,7 +237,7 @@ function AssistantMessage({ msg, live, convId }: { msg: Message; live?: LiveStat
         <span>助手</span>
         {live && <LiveBar live={live} />}
       </div>
-      {split.timeline.length > 0 && (
+      {split.timeline.some(part => part.type !== 'thinking') && (
         <div className="process-collapse">
           <Collapsible id={memKey} open={open} onToggle={toggleProcess} triggerClassName="process-collapse-summary" unmountDelay={300}
             trigger={<>
@@ -268,7 +259,8 @@ function AssistantMessage({ msg, live, convId }: { msg: Message; live?: LiveStat
       {extras.map(art => (
         <DeliverableCard key={art.id} artifact={{ artifactId: art.id, name: art.name, kind: art.kind }} />
       ))}
-      {live && <LiveAgentNotes live={live} />}
+      {live && Object.keys(live.agentNotes).length > 0 && <Collapsible id={`agent-notes:${live.runId}`}
+        triggerClassName="process-collapse-summary" trigger={<span>协作记录</span>}><LiveAgentNotes live={live} /></Collapsible>}
       {!live && ctxObs && <ContextObsView obs={ctxObs} />}
       {convId && <MessageTools msg={msg} convId={convId} />}
     </div>
@@ -282,25 +274,32 @@ function SessionNoteField({ convId, note }: { convId: string; note: string }) {
     <input className="search-input session-note" value={value} placeholder="本会话要求"
       title="附在上下文末尾，不改系统前缀"
       onChange={e => setValue(e.target.value)}
-      onBlur={() => { if (value !== note) void api.setSessionNote(convId, value).then(() => store.openConversation(convId)) }} />
+      onBlur={() => { if (value !== note) void api.setSessionNote(convId, value).then(() => {
+        if (store.getState().currentConvId === convId) return store.openConversation(convId)
+      }) }} />
   )
 }
 
 function MessageTools({ msg, convId }: { msg: Message; convId: string }) {
   const text = msg.parts.filter(p => p.type === 'text').map(p => p.text ?? '').join('\n')
-  const refresh = () => { void store.openConversation(convId) }
+  const refresh = () => { if (store.getState().currentConvId === convId) void store.openConversation(convId) }
   return (
     <div className="msg-tools">
-      <button className="btn ghost" type="button" onClick={() => { void navigator.clipboard.writeText(text) }}>复制</button>
-      <button className="btn ghost" type="button" onClick={() => { void api.excludeMessage(msg.id, !msg.excluded).then(refresh) }}>
-        {msg.excluded ? '纳入上下文' : '排除出上下文'}
-      </button>
-      {msg.role === 'assistant' && (
-        <button className="btn ghost" type="button" onClick={() => { void api.regenerate(convId, msg.id).then(refresh) }}>重新生成</button>
-      )}
-      {msg.variantGroup && msg.excluded && (
-        <button className="btn ghost" type="button" onClick={() => { void api.selectVariant(msg.id).then(refresh) }}>使用此候选</button>
-      )}
+      <button className="companion-message-copy" type="button" onClick={() => { void navigator.clipboard.writeText(text) }}>复制</button>
+      <Collapsible id={`message-operations:${convId}:${msg.id}`} trigger="消息操作" triggerClassName="companion-message-copy">
+        <div className="companion-message-actions">
+          <button className="btn ghost" type="button" onClick={() => { void api.excludeMessage(msg.id, !msg.excluded).then(refresh) }}>
+            {msg.excluded ? '纳入上下文' : '排除出上下文'}
+          </button>
+          {msg.role === 'assistant' && (
+            <button className="btn ghost" type="button" onClick={() => { void api.regenerate(convId, msg.id).then(refresh) }}>重新生成</button>
+          )}
+          {msg.variantGroup && msg.excluded && (
+            <button className="btn ghost" type="button" onClick={() => { void api.selectVariant(msg.id).then(refresh) }}>使用此候选</button>
+          )}
+          {msg.role === 'user' && <RewindControl convId={convId} messageId={msg.id} />}
+        </div>
+      </Collapsible>
       {msg.variantGroup && <span className="process-collapse-meta">候选 {(msg.variantIndex ?? 0) + 1}</span>}
     </div>
   )
@@ -349,16 +348,32 @@ function LiveAgentNotes({ live }: { live: LiveState }) {
 
 function HITLCardView({ card }: { card: HITLCard }) {
   const [free, setFree] = useState('')
-  const [submitting, setSubmitting] = useState(false)
+  const actionState = useStore(s => s.cardActionStates?.[`hitl:${card.id}`])
+  const submitting = actionState !== undefined
+  // wfcompile.doScript 使用固定首行 + 脚本预览；其他多行问题可能包含
+  // 用户必须理解的业务后果，保持原样，不凭内容猜测其信息层级。
+  const scriptPrefix = '运行这段脚本？\n'
+  const hasScriptPreview = card.kind === 'confirm' && card.question.startsWith(scriptPrefix)
+  const question = hasScriptPreview ? scriptPrefix.trimEnd() : card.question
+  const detail = [hasScriptPreview ? card.question.slice(scriptPrefix.length) : '', card.detail]
+    .filter(value => value?.trim()).join('\n\n')
   const answer = async (resp: { choiceId?: string; freeText?: string }) => {
-    setSubmitting(true)
+    if (store.getState().cardActionStates?.[`hitl:${card.id}`]) return
     await store.resolveHITL(card.id, resp)
-    setSubmitting(false)
   }
   return (
     <div className={`hitl-card${card.kind === 'confirm' ? ' wait' : ''}${card.kind === 'choice' || card.kind === 'input' ? ' ask' : ''}`}>
-      <div className="hitl-q"><Icon name="check" size={15} />{card.question}</div>
-      {card.detail && <pre className="hitl-detail">{card.detail}</pre>}
+      <div className="hitl-q"><Icon name="check" size={15} />{question}</div>
+      {card.blocked && <div className="companion-action-feedback" role="status">
+        操作受限：{card.blockReason || '当前操作条件尚未满足'}
+      </div>}
+      {detail && <div className="process-collapse"><Collapsible id={`hitl-details:${card.conversationId}:${card.id}`}
+        triggerClassName="process-collapse-summary" trigger={<><span className="process-collapse-chev">▸</span>操作详情</>}>
+        <pre className="hitl-detail">{detail}</pre>
+      </Collapsible></div>}
+      {actionState && <div className="companion-action-feedback" role="status">
+        {actionState === 'unknown' ? '正在核实处理结果' : '正在提交你的选择'}
+      </div>}
       {card.choices && (
         <div className="hitl-choices">
           {card.choices.map(c => (
@@ -373,7 +388,7 @@ function HITLCardView({ card }: { card: HITLCard }) {
       {card.allowFreeInput && (
         <div className="hitl-free">
           <input className="search-input" value={free} onChange={e => setFree(e.target.value)}
-            placeholder={card.freeInputHint || '自由输入…'} onKeyDown={e => { if (e.key === 'Enter' && free.trim()) answer({ freeText: free.trim() }) }} />
+            disabled={submitting} placeholder={card.freeInputHint || '补充你的要求'} onKeyDown={e => { if (e.key === 'Enter' && free.trim() && !submitting) void answer({ freeText: free.trim() }) }} />
           <button className="btn ghost" disabled={!free.trim() || submitting} onClick={() => answer({ freeText: free.trim() })}>发送</button>
         </div>
       )}
@@ -450,6 +465,13 @@ export function NoticeMessage({ msg }: { msg: Message }) {
 }
 
 export function Conversation() {
+  const conversationId = useStore(s => s.currentConvId)
+  const projectId = useStore(s => s.currentProjectId)
+  // 本地草稿、附件、折叠设置与滚动跟随属于当前会话，切换时一起重置。
+  return <ConversationSession key={`${projectId}:${conversationId}`} />
+}
+
+function ConversationSession() {
   const currentConvId = useStore(s => s.currentConvId)
   const conversation = useStore(s => s.tasks.find(c => c.id === s.currentConvId))
   const messages = useStore(s => s.messages)
@@ -462,17 +484,25 @@ export function Conversation() {
   const artifacts = useStore(s => s.artifacts)
   const profiles = useStore(s => s.profiles)
   const cards = useStore(s => s.cards)
-  const projectName = useStore(s => s.projects.find(p => p.id === s.currentProjectId)?.name ?? '项目')
-
-  const runtimeMock = useStore(s => s.runtimeMock)
+  const currentProjectId = useStore(s => s.currentProjectId)
+  const cardActionStates = useStore(s => s.cardActionStates)
   const [text, setText] = useState('')
   const [attachmentIds, setAttachmentIds] = useState<string[]>([])
   const [attachmentNames, setAttachmentNames] = useState<string[]>([])
   const [dragDepth, setDragDepth] = useState(0)
+  const [uploading, setUploading] = useState(0)
+  const [uploadError, setUploadError] = useState('')
+  const composeActive = useRef(true)
+  const inputRef = useRef<HTMLTextAreaElement>(null)
   const bodyRef = useRef<HTMLDivElement>(null)
   const stickRef = useRef(true)
   const [showJump, setShowJump] = useState(false)
 
+  useEffect(() => {
+    composeActive.current = true
+    return () => { composeActive.current = false }
+  }, [])
+
   artifactCache = Object.fromEntries(artifacts.map(a => [a.id, a]))
   cardCache = Object.fromEntries(cards.map(c => [c.id, c]))
 
@@ -492,8 +522,30 @@ export function Conversation() {
     bodyRef.current?.scrollTo({ top: bodyRef.current.scrollHeight })
   }, [messages.length, live?.items, live?.phase, activeHitl.length])
 
+  const composeIsCurrent = () => {
+    const state = store.getState()
+    return composeActive.current && state.currentConvId === currentConvId && state.currentProjectId === currentProjectId
+  }
+  const addMaterials = async (files: File[]) => {
+    if (!files.length) return
+    setUploadError('')
+    setUploading(count => count + files.length)
+    for (const file of files) {
+      if (!composeIsCurrent()) return
+      const id = await store.uploadAttachment(file)
+      if (!composeIsCurrent()) return
+      setUploading(count => Math.max(0, count - 1))
+      if (id) {
+        setAttachmentIds(ids => [...ids, id])
+        setAttachmentNames(names => [...names, file.name])
+      } else {
+        setUploadError(message => [message, `「${file.name}」未能添加，请重新选择文件`].filter(Boolean).join('；'))
+      }
+    }
+  }
+
   const send = async () => {
-    if (!text.trim() && attachmentIds.length === 0) return
+    if (uploading > 0 || (!text.trim() && attachmentIds.length === 0)) return
     const t = text
     const ids = attachmentIds
     const names = attachmentNames
@@ -507,54 +559,54 @@ export function Conversation() {
 
   if (!currentConvId) {
     return (
-      <div className="chat">
-        <div className="chat-body"><div className="empty-state">
-          <div style={{ fontSize: 40 }}>⌘</div>
-          <div>选择或创建一个会话开始</div>
-          {runtimeMock
-            ? <div style={{ fontSize: 'var(--fs-ui-sm)' }}>mock 模式演示指令：#hitl · #agents · #doc · #error</div>
-            : <div style={{ fontSize: 'var(--fs-ui-sm)' }}>演示模式可在设置里打开，无需模型密钥</div>}
+      <div className="chat work-companion-chat">
+        <div className="chat-body"><div className="empty-state companion-empty">
+          <span className="es-mark"><Icon name="sparkles" size={22} /></span>
+          <div className="companion-empty-title">从一件需要完成的工作开始</div>
+          <div>告诉助手你的目标，或准备好需要一起阅读的材料</div>
+          <button type="button" className="btn" onClick={() => { void store.createTask() }}>开始新对话</button>
         </div></div>
       </div>
     )
   }
 
   return (
-    <div className={`chat ${dragDepth > 0 ? 'is-dragging' : ''}`}
+    <div className={`chat work-companion-chat ${dragDepth > 0 ? 'is-dragging' : ''}`}
       onDragEnter={e => { if (!hasFiles(e.dataTransfer)) return; e.preventDefault(); setDragDepth(d => d + 1) }}
       onDragOver={e => { if (hasFiles(e.dataTransfer)) e.preventDefault() }}
       onDragLeave={() => setDragDepth(d => Math.max(0, d - 1))}
-      onDrop={async e => {
+      onDrop={e => {
         if (!e.dataTransfer?.files?.length) return
         e.preventDefault()
         setDragDepth(0)
-        for (const f of Array.from(e.dataTransfer.files)) {
-          const id = await store.uploadAttachment(f)
-          if (id) { setAttachmentIds(a => [...a, id]); setAttachmentNames(a => [...a, f.name]) }
-        }
+        void addMaterials(Array.from(e.dataTransfer.files))
       }}>
       {dragDepth > 0 && <div className="drop-veil">释放以上传资料</div>}
       <div className="chat-header">
-        <span className="project-badge" title="当前项目">{projectName}</span>
         <div className="chat-title">{conversation?.title ?? '会话'}</div>
-        <select className="effect-badge" value={conversation?.profileId || 'default'} title="切换会话画像"
+        <Collapsible id={`conversation-settings:${currentProjectId}:${currentConvId}`} triggerClassName="companion-settings-trigger"
+          trigger={<><Icon name="settings" size={14} /><span>会话设置</span></>} bodyClassName="companion-settings-body">
+        <label className="companion-setting"><span>工作方式</span>
+        <select value={conversation?.profileId || 'default'} aria-label="工作方式"
           onChange={async e => {
             if (!currentConvId) return
             await api.setConversationProfile(currentConvId, e.target.value)
-            await store.openConversation(currentConvId)
+            if (store.getState().currentConvId === currentConvId) await store.openConversation(currentConvId)
           }}>
           {profiles.map(p => <option key={p.id} value={p.id}>{p.name}</option>)}
         </select>
-        <button className="btn ghost" style={{ display: 'inline-flex', alignItems: 'center', gap: 4 }}
+        </label>
+        <div className="companion-setting"><span>读取同项目的其他对话</span><button className="btn ghost"
           title={conversation?.allowCrossRead === false
             ? '本会话不读取其他会话记录（点击开启）'
             : '本会话可读取同项目其他会话记录（需项目设置开启跨会话读取；点击关闭）'}
           onClick={() => currentConvId && store.setCrossFlags(currentConvId, { allowCrossRead: conversation?.allowCrossRead === false })}>
-          <Icon name="users" size={13} />跨读{conversation?.allowCrossRead === false ? '·关' : '·开'}
+          {conversation?.allowCrossRead === false ? '关闭' : '允许'}
         </button>
-        <SessionNoteField convId={currentConvId} note={conversation?.sessionNote ?? ''} />
-        <span title={connected ? '事件流已连接' : '重连中'} className={`conn-dot ${connected ? 'on' : 'off'}`} />
-        {!connected && <span className="conn-label">重连中</span>}
+        <span className="companion-setting-note">实际读取范围还需项目设置允许</span></div>
+        <label className="companion-setting"><span>这次工作的要求</span><SessionNoteField convId={currentConvId} note={conversation?.sessionNote ?? ''} /></label>
+        </Collapsible>
+        <span title={connected ? '已连接' : '正在重新连接'} className={`conn-dot ${connected ? 'on' : 'off'}`} />
       </div>
 
       <div className="chat-body" ref={bodyRef}
@@ -584,10 +636,10 @@ export function Conversation() {
                 </div>
                 <div className="bubble">{m.parts.filter(p => p.type === 'text').map(p => p.text).join('\n')}</div>
                 {currentConvId && <MessageTools msg={m} convId={currentConvId} />}
-                {currentConvId && <RewindControl convId={currentConvId} messageId={m.id} />}
                 {anchored.map(c => (
                   <InlineConfirmCard key={c.id} card={c} callbacks={{
                     onAction: (card, actionId) => store.cardAction(card, actionId),
+                    actionState: card => cardActionStates?.[card.id],
                     onLocate: card => store.openInbox(card.id),
                   }} />
                 ))}
@@ -600,10 +652,16 @@ export function Conversation() {
         {showLiveBubble(live?.runId ?? null, messages.filter(m => m.role === 'assistant' && m.runId).map(m => m.runId as string)) && live &&
           <AssistantMessage key={`live-${live.runId}`} msg={liveToMessage(live)} live={live} />}
         {activeHitl.map(c => <HITLCardView key={c.id} card={c} />)}
-        {messages.length === 0 && <div className="empty-state">
+        <ConversationWork />
+        {messages.length === 0 && !live && cards.length === 0 && activeHitl.length === 0 && <div className="empty-state companion-empty">
           <span className="es-mark"><Icon name="sparkles" size={22} /></span>
-        <div>发送消息开始对话</div>
-          {runtimeMock && <div style={{ fontSize: 'var(--fs-ui-sm)', color: 'var(--text-faint)' }}>mock 模式演示指令：#hitl · #agents · #doc · #error　·　命令：/help</div>}
+          <div className="companion-empty-title">这次想完成什么</div>
+          <div>说说目标，也可以先添加材料</div>
+          <div className="companion-examples" aria-label="可参考的工作目标">
+            {['帮我整理这些材料中的重点和缺项', '一起比较这两个方案，说明各自适合的情况', '帮我把已有想法整理成一份草稿'].map(example => (
+              <button type="button" className="companion-example" key={example} onClick={() => { setText(example); inputRef.current?.focus() }}>{example}</button>
+            ))}
+          </div>
         </div>}
       </div>
       {showJump && (
@@ -616,59 +674,59 @@ export function Conversation() {
 
       <div className="input-bar">
         <OutboxPanel />
+        {!connected && <div className="companion-reconnect" role="status">正在重新连接，最新进展待确认</div>}
         {/* 轻量状态提示（方案：快慢通道连续体验）：忙碌时可继续输入排队；
             后台任务在回合结束后仍在执行，完成后回到对话汇报。 */}
         {(busy || bgRunning > 0) && (
           <div className="input-status" data-testid="input-status">
             <span className="live-dot" />
             {busy
-              ? <span className="mk-sweep">助手工作中{bgRunning > 0 ? ` · ${bgRunning} 个后台任务` : ''}</span>
-              : <span>{bgRunning} 个后台任务进行中</span>}
-            <span className="input-status-note">{busy ? '输入仍可排队' : '完成后回到对话汇报'}</span>
-            <span style={{ flex: 1 }} />
-            <button type="button" className="input-status-link" onClick={() => store.openInbox()}>在工作里查看</button>
+              ? <span className="mk-sweep">助手正在处理{bgRunning > 0 ? ` · ${bgRunning} 项后台工作` : ''}</span>
+              : <span>{bgRunning} 项后台工作</span>}
+            <span className="input-status-note">{busy ? '新消息会排队，当前回合结束后发送' : '你可以继续对话，完成后会在这里汇报'}</span>
           </div>
         )}
         {attachmentNames.length > 0 && (
           <div className="attachments">
             {attachmentNames.map((n, i) => <span className="attach-chip" key={i}><Icon name='paperclip' size={12} /> {n}
-              <span style={{ cursor: 'pointer', display: 'inline-flex' }} onClick={() => { setAttachmentIds(a => a.filter((_, j) => j !== i)); setAttachmentNames(a => a.filter((_, j) => j !== i)) }}><Icon name="x" size={11} /></span>
+              <button type="button" className="companion-remove-material" aria-label={`移除材料 ${n}`} onClick={() => { setAttachmentIds(a => a.filter((_, j) => j !== i)); setAttachmentNames(a => a.filter((_, j) => j !== i)) }}><Icon name="x" size={11} /></button>
             </span>)}
           </div>
         )}
+        {uploading > 0 && <div className="companion-upload-status" role="status">正在添加 {uploading} 份材料，完成后即可发送</div>}
+        {uploadError && <div className="companion-upload-error" role="alert">{uploadError}</div>}
+        <Collapsible id={`operation-settings:${currentProjectId}:${currentConvId}`} triggerClassName="companion-operation-trigger"
+          trigger={<><Icon name="settings" size={13} /><span>操作设置</span></>} bodyClassName="companion-operation-body">
+          <label className="companion-setting"><span>操作权限</span><select aria-label="操作权限" value={conversation?.permissionMode || 'default'} onChange={e => {
+            const mode = e.target.value
+            if (mode === 'default' || mode === 'plan' || mode === 'auto_edit') void store.setPermissionMode(currentConvId, mode)
+          }}>
+            <option value="default">默认</option><option value="plan">计划</option><option value="auto_edit">自动改文件</option>
+          </select></label>
+          <p className="companion-setting-note">计划模式只进行读取与规划；自动改文件模式允许文件修改。重要操作仍按当前权限规则确认</p>
+        </Collapsible>
         {text.startsWith('/') && <CommandMenu text={text} onPick={c => setText(c)} />}
         <div className="input-row">
-          <label className="mode-select" title="本会话的权限模式">
-            <span>权限</span>
-            <select value={conversation?.permissionMode || 'default'} onChange={e => {
-              const mode = e.target.value
-              if (mode === 'default' || mode === 'plan' || mode === 'auto_edit') {
-                if (currentConvId) void store.setPermissionMode(currentConvId, mode)
-              }
-            }}>
-              <option value="default">默认</option>
-              <option value="plan">计划</option>
-              <option value="auto_edit">自动改文件</option>
-            </select>
-          </label>
-          <label className="icon-btn" title="上传附件（文档解析后注入上下文）">
-            <Icon name="paperclip" size={16} /><input type="file" multiple style={{ display: 'none' }} onChange={async e => {
-              for (const f of Array.from(e.target.files ?? [])) {
-                const id = await store.uploadAttachment(f)
-                if (id) { setAttachmentIds(a => [...a, id]); setAttachmentNames(a => [...a, f.name]) }
-              }
-              e.target.value = ''
-            }} />
-          </label>
-          <textarea rows={1} value={text} placeholder={hasOpenConfirm(cards) ? '有待确认的命令——请先处理上方确认卡'
-            : busy ? '继续输入以排队'
-            : artifacts.length > 0 ? '输入消息…（/ 命令，@knowledge 检索注入）' : '输入消息…（/ 命令）'}
+          <textarea ref={inputRef} rows={2} value={text} aria-label="工作目标或消息" placeholder={hasOpenConfirm(cards) ? '有一项操作等你确认，请先查看上方说明'
+            : busy ? '继续补充，新消息会在当前回合结束后发送'
+            : '告诉助手你的目标，或添加需要一起阅读的材料'}
             onChange={e => setText(e.target.value)}
             onKeyDown={e => { if (e.key === 'Enter' && !e.shiftKey) { e.preventDefault(); send() } }} />
+          <div className="companion-compose-actions">
+          <label className="companion-add-material" title="添加材料">
+            <Icon name="paperclip" size={16} /><span>添加材料</span><input type="file" multiple className="companion-file-input" aria-label="添加材料" onChange={e => {
+              const files = Array.from(e.currentTarget.files ?? [])
+              e.currentTarget.value = ''
+              void addMaterials(files)
+            }} />
+          </label>
+          <span className="companion-input-hint">Enter 发送 · Shift+Enter 换行</span>
+          <span className="companion-compose-spacer" />
           {showStop && (
-            <button className="btn danger" onClick={() => store.cancelActive()}>停止</button>
+            <button type="button" className="btn danger" onClick={() => store.cancelActive()}>停止</button>
           )}
-          <button className="btn" onClick={send} disabled={!text.trim() && attachmentIds.length === 0}>{busy ? '排队' : '发送'}</button>
+          <button type="button" className="btn" onClick={send} disabled={uploading > 0 || (!text.trim() && attachmentIds.length === 0)}>{busy ? '加入队列' : '发送'}</button>
+          </div>
         </div>
       </div>
     </div>
@@ -697,7 +755,7 @@ function RewindControl({ convId, messageId }: { convId: string; messageId: strin
     try {
       await api.rewindFiles(convId, messageId)
       setOpen(false)
-      await store.openTask(convId)
+      if (store.getState().currentConvId === convId) await store.openTask(convId)
     } catch (e) {
       setErr(e instanceof Error ? e.message : String(e))
     } finally {
diff --git a/src/components/ConversationWork.tsx b/src/components/ConversationWork.tsx
new file mode 100644
index 0000000..b547141
--- /dev/null
+++ b/src/components/ConversationWork.tsx
@@ -0,0 +1,68 @@
+import { useEffect, useMemo, useState } from 'react'
+import { ActivityCardView, Collapsible, activitySummary, pendingCount, type ActivityCard } from '@ui'
+import { store, useStore } from '../store'
+import { docBridge } from './Workbench'
+
+/** 对话与辅助工作栏共享对象、动作和唯一文件预览，不另持有异步状态。 */
+export function ConversationWork() {
+  const cards = useStore(s => s.cards)
+  const conversationId = useStore(s => s.currentConvId)
+  const projectId = useStore(s => s.currentProjectId)
+  const messages = useStore(s => s.messages)
+  const actionStates = useStore(s => s.cardActionStates)
+  const rightCollapsed = useStore(s => s.ui.rightCollapsed)
+  const [summaryOpen, setSummaryOpen] = useState(rightCollapsed)
+  useEffect(() => setSummaryOpen(rightCollapsed), [rightCollapsed])
+  const { current, required, focused, history } = useMemo(() => {
+    const current = cards.filter(card => card.status !== 'dismissed'
+      && card.conversationId === conversationId && card.projectId === projectId)
+    const required: ActivityCard[] = []
+    const remaining: ActivityCard[] = []
+    for (const card of current) {
+      // A confirmation already visible at its user message has one main action
+      // path in the conversation; assistant-anchored cards still need this path.
+      if (card.kind === 'confirm' && card.anchorMessageId
+        && messages.some(message => message.role === 'user' && message.id === card.anchorMessageId)) continue
+      const summary = activitySummary(card)
+      if (card.status === 'action_required' || summary.failed || (card.status === 'done' && summary.remaining)) required.push(card)
+      else remaining.push(card)
+    }
+    // Preserve the host's newest-first order for completed results and history.
+    const focused = remaining.find(card => card.pinned && card.status === 'active')
+      ?? remaining.find(card => card.status === 'active')
+      ?? remaining.find(card => card.status === 'done') ?? remaining[0]
+    return { current, required, focused, history: remaining.filter(card => card !== focused) }
+  }, [cards, messages, conversationId, projectId])
+  if (current.length === 0) return null
+  const pending = pendingCount(current)
+  const active = current.filter(card => card.status === 'active').length
+  const results = current.filter(card => card.status === 'done' || card.status === 'failed').length
+  const summary = [pending ? `${pending} 项待处理` : '', active ? `${active} 项工作` : '', results ? `${results} 项结果` : ''].filter(Boolean).join(' · ')
+  const callbacks = {
+    onAction: (card: ActivityCard, actionId: string) => { void store.cardAction(card, actionId) },
+    actionState: (card: ActivityCard) => actionStates?.[card.id],
+    onPin: (card: ActivityCard, pinned: boolean) => { void store.cardPin(card, pinned) },
+    onDismiss: (card: ActivityCard) => { void store.cardDismiss(card) },
+    onLocate: (card: ActivityCard) => { store.locateMessage(card.anchorMessageId) },
+    onArchive: (card: ActivityCard) => { void store.cardToProject(card) },
+  }
+  const view = (card: ActivityCard) => <ActivityCardView key={card.id} card={card} callbacks={callbacks} docBridge={docBridge} />
+
+  return (
+    <section className="conversation-work" data-conversation-work aria-label="工作进展">
+      <div className="conversation-work-heading"><span>工作进展</span><span>{summary || '已处理的工作'}</span></div>
+      <div className="conversation-work-current">
+        {required.map(view)}
+        {focused && <Collapsible id={`conversation-current:${conversationId}:${focused.id}`} open={summaryOpen} onToggle={setSummaryOpen}
+          triggerClassName="conversation-work-more" trigger={<><span className="process-collapse-chev">▸</span>{focused.title} · 查看摘要</>}>
+          {view(focused)}
+        </Collapsible>}
+      </div>
+      {history.length > 0 && <Collapsible id={`conversation-work:${projectId}:${conversationId}`}
+        triggerClassName="conversation-work-more"
+        trigger={<><span className="process-collapse-chev">▸</span>更多工作与成果 · {history.length} 项</>}>
+        <div className="conversation-work-history">{history.map(view)}</div>
+      </Collapsible>}
+    </section>
+  )
+}
diff --git a/src/components/ProcessTimeline.tsx b/src/components/ProcessTimeline.tsx
index d2c8a56..9ecd4d4 100644
--- a/src/components/ProcessTimeline.tsx
+++ b/src/components/ProcessTimeline.tsx
@@ -1,10 +1,9 @@
-// 工作时间线：思考、对用户的解说、同类工具合并成一行。运行中展开；
-// 终轮结束后由调用方套进「已工作 X」折叠。
+// 执行记录按工作动作分组；展开状态由调用方控制。
 import type { ReactNode } from 'react'
-import { Collapsible, ToolBlock } from '@ui'
+import { ToolBlock } from '@ui'
 import type { Part } from '../contracts'
 import { formatDuration, humanSize } from '../messageparts'
-import { timelineEntries, toolGroupLabel, toolTail, type ToolGroupItem } from '../toolkind'
+import { timelineEntries, toolGroupLabel, type ToolGroupItem } from '../toolkind'
 
 export function ProcessTimeline({ parts, live, idKey, renderPart }: {
   parts: Part[]
@@ -16,20 +15,8 @@ export function ProcessTimeline({ parts, live, idKey, renderPart }: {
   return (
     <div className="tl">
       {rows.map((row, i) => {
-        if (row.kind === 'thinking') {
-          const dur = formatDuration(row.durationMs)
-          const label = row.active ? '思考中' : (dur ? `思考 · 持续了 ${dur}` : '思考')
-          return (
-            <div className="part-thinking" key={`${idKey}:th:${i}`}>
-              <Collapsible id={`think:${idKey}:${i}:${row.active ? 'live' : 'done'}`} defaultOpen={row.active} key={row.active ? 'open' : 'shut'}
-                triggerClassName="part-thinking-summary"
-                trigger={<><span className="part-thinking-chev">▸</span>
-                  <span className={row.active ? 'mk-sweep' : ''}>{label}</span></>}>
-                <div className="part-thinking-body">{row.text}</div>
-              </Collapsible>
-            </div>
-          )
-        }
+        // 模型内部思考不是用户工作内容，也不属于可展开的执行记录。
+        if (row.kind === 'thinking') return null
         if (row.kind === 'text') {
           return <div className="part" key={`${idKey}:tx:${i}`}>{renderPart({ type: 'text', text: row.text }, false)}</div>
         }
@@ -70,7 +57,6 @@ function sizeLabel(n: number): string {
 
 function ToolCallBlock({ item }: { item: ToolGroupItem }) {
   const composing = item.phase === 'composing'
-  const tail = item.running ? toolTail(item.arguments, item.output) : ''
   const dur = !item.running ? formatDuration(item.durationMs) : ''
   const detail = composing ? undefined : (dur ? `${item.headline} · ${dur}` : item.headline)
   return (
@@ -88,7 +74,6 @@ function ToolCallBlock({ item }: { item: ToolGroupItem }) {
         {item.arguments && <pre className="tool-preview">{item.arguments}</pre>}
         {item.output && <pre className="tool-preview">{item.output}</pre>}
       </ToolBlock>
-      {tail && <pre className="tool-live-preview">{tail}</pre>}
     </div>
   )
 }
diff --git a/src/components/TaskSidebar.tsx b/src/components/TaskSidebar.tsx
index f007f62..e08fadf 100644
--- a/src/components/TaskSidebar.tsx
+++ b/src/components/TaskSidebar.tsx
@@ -21,7 +21,7 @@ function Menu({ anchor, onClose, children }: { anchor: HTMLElement | null; onClo
     if (x + el.offsetWidth > window.innerWidth - 8) x = window.innerWidth - el.offsetWidth - 8
     if (y + el.offsetHeight > window.innerHeight - 8) y = r.top - el.offsetHeight - 6
     el.style.left = `${Math.max(8, x)}px`
-    el.style.top = `${y}px`
+    el.style.top = `${Math.max(8, Math.min(y, window.innerHeight - el.offsetHeight - 8))}px`
     const h = (e: MouseEvent) => { if (!el.contains(e.target as Node)) onClose() }
     window.addEventListener('mousedown', h)
     return () => window.removeEventListener('mousedown', h)
@@ -36,7 +36,16 @@ function MenuItem({ onClick, danger, icon, children }: { onClick: () => void; da
   </button>
 }
 
-export function TaskSidebar() {
+interface TaskSidebarProps {
+  onCollapse?: () => void
+  onConversationOpen?: () => void
+  onFilesOpen?: () => void
+  onWorkOpen?: () => void
+}
+
+export function TaskSidebar({ onCollapse = store.toggleLeft, onConversationOpen,
+  onFilesOpen = store.openFiles, onWorkOpen = store.focusPending,
+}: TaskSidebarProps = {}) {
   const projects = useStore(s => s.projects)
   const tasks = useStore(s => s.tasks)
   const me = useStore(s => s.me)
@@ -58,16 +67,10 @@ export function TaskSidebar() {
   const [creatingProject, setCreatingProject] = useState(false)
   const [newProjectName, setNewProjectName] = useState('')
 
-  // ⌘N/Ctrl+N 新建任务（P6：创建入口唯一 + 快捷键）。
-  useEffect(() => {
-    const h = (e: KeyboardEvent) => {
-      const k = e.key.toLowerCase()
-      if ((e.metaKey || e.ctrlKey) && k === 'n') { e.preventDefault(); store.createTask() }
-      if ((e.metaKey || e.ctrlKey) && k === 'b') { e.preventDefault(); store.toggleLeft() }
-    }
-    window.addEventListener('keydown', h, true)
-    return () => window.removeEventListener('keydown', h, true)
-  }, [])
+  const createConversation = async (projectId?: string) => {
+    await store.createTask(projectId)
+    onConversationOpen?.()
+  }
 
   const tools = buildWorkspaceEntries(serverWorkspaces, { rdmAudit: rdmAuditAvailable })
   const visible = filterTasks(tasks.filter(t => t.projectId === currentProjectId), q)
@@ -97,16 +100,21 @@ export function TaskSidebar() {
       ?? tasks.find(t => t.projectId === pid && !t.archived)
     if (next) store.openTask(next.id)
     else store.openProject(pid)
+    onConversationOpen?.()
   }
 
   const taskRow = (t: Conversation) => (
     <div key={t.id} className={`tsb-task ${t.id === currentConvId ? 'active' : ''} ${t.archived ? 'archived' : ''}`}
-      onClick={() => store.openTask(t.id)}
       onContextMenu={e => { e.preventDefault(); setMenu({ kind: `row:${t.id}`, anchor: e.currentTarget as HTMLElement }) }}>
-      <span className="tsb-task-t" title={t.title}>{t.title || '未命名任务'}</span>
-      {t.crossPrivate && <span className="tsb-pbadge" title="私有：不被其他会话读取"><Icon name="shield" size={11} /></span>}
-      <span className="tsb-task-tm">{relativeTime(t.updatedAt)}</span>
+      <button className="tsb-task-open" onClick={() => { store.openTask(t.id); onConversationOpen?.() }}>
+        <Icon name="message" size={14} />
+        <span className="tsb-task-t" title={t.title}>{t.title || '未命名对话'}</span>
+        {t.crossPrivate && <span className="tsb-pbadge" title="私有：不被其他会话读取"><Icon name="shield" size={11} /></span>}
+        <span className="tsb-task-tm">{relativeTime(t.updatedAt)}</span>
+      </button>
       {rowActions(t)}
+      <button className="tsb-row-menu" aria-label={`「${t.title || '未命名对话'}」更多操作`} title="更多对话操作"
+        onClick={e => setMenu({ kind: `row:${t.id}`, anchor: e.currentTarget })}><Icon name="more" size={14} /></button>
     </div>
   )
 
@@ -121,22 +129,21 @@ export function TaskSidebar() {
           {stage && <span className="tsb-projrow-stage">{stage}</span>}
           <span className="tsb-user-chev"><Icon name="chevron-down" size={13} /></span>
         </button>
-        <span style={{ flex: 1 }} />
-        <button className="tsb-iconbtn" title="收起侧栏（⌘B）" onClick={store.toggleLeft}><Icon name="panel-left" /></button>
+        <button className="tsb-iconbtn" title="收起侧栏（⌘B）" onClick={onCollapse}><Icon name="panel-left" /></button>
       </div>
 
-      {/* 单一主创建入口（P6）：新建任务 + 次级菜单（新建项目/指定项目新建） */}
+      {/* 主入口创建会话；项目创建保留在次级菜单。 */}
       <div className="tsb-actions">
         <div className="tsb-newtask">
-          <button className="tsb-newtask-main" title="在当前项目新建任务（⌘N）" onClick={() => store.createTask()}>
-            <Icon name="plus" size={15} />新建任务{currentProject ? <span className="tsb-newtask-proj">{currentProject.name}</span> : null}
+          <button className="tsb-newtask-main" title="在当前项目新建对话（⌘N）" onClick={() => createConversation()}>
+            <Icon name="plus" size={15} />新建对话
           </button>
           <button className="tsb-newtask-caret" title="更多创建选项"
             onClick={e => { const el = e.currentTarget; setMenu(m => m?.kind === 'new' ? null : { kind: 'new', anchor: el }) }}><Icon name="chevron-down" size={14} /></button>
         </div>
         <div className="tsb-search">
           <Icon name="search" size={14} />
-          <input placeholder="搜索任务…" value={q} onChange={e => setQ(e.target.value)} />
+          <input aria-label="搜索本项目会话" placeholder="搜索对话…" value={q} onChange={e => setQ(e.target.value)} />
         </div>
       </div>
 
@@ -172,14 +179,14 @@ export function TaskSidebar() {
         )}
 
         {rest.length === 0 && pinned.length === 0 && (
-          <div className="tsb-empty">这个项目还没有会话——点击「新建任务」开始</div>
+          <div className="tsb-empty">从「新建对话」开始，描述你想完成的工作。</div>
         )}
         {rest.map(t => taskRow(t))}
       </div>
 
       {/* 底部（方案：文件、工作区、账户沉底）。 */}
       <div className="tsb-bottom">
-        <button className="tsb-tool" title="文件搜索、预览、编辑与下载（第三栏「文件」入口）" onClick={() => store.openFiles()}>
+        <button className="tsb-tool" title="文件搜索、预览、编辑与下载" onClick={onFilesOpen}>
           <span className="tsb-tool-icon"><Icon name="folder" size={14} /></span>
           <span className="tsb-tool-name">文件</span>
           {artifacts.length > 0 && <span className="tsb-group-cnt">{artifacts.length}</span>}
@@ -191,7 +198,6 @@ export function TaskSidebar() {
             <kbd>{entry.shortcut}</kbd>
           </button>
         ))}
-        {serverWorkspaces.length === 0 && <div className="tsb-tool-note">领域工具由系统级插件提供</div>}
         {currentProject && (
           <button className="tsb-tool" onClick={() => store.openProjectSettings(currentProject.id)}>
             <span className="tsb-tool-icon"><Icon name="settings" size={14} /></span>
@@ -211,7 +217,7 @@ export function TaskSidebar() {
           <span className="tsb-user-chev"><Icon name="chevron-down" size={13} /></span>
         </button>
         <button className="tsb-iconbtn" title="设置" onClick={() => store.openSettings(true)}><Icon name="settings" size={15} /></button>
-        {pendingBadge > 0 && <button className="tsb-iconbtn active" title={`待办 ${pendingBadge}`} onClick={() => store.focusPending()}><Icon name="inbox" size={15} />{pendingBadge}</button>}
+        {pendingBadge > 0 && <button className="tsb-iconbtn active" title={`待办 ${pendingBadge}`} onClick={onWorkOpen}><Icon name="inbox" size={15} />{pendingBadge}</button>}
       </div>
 
       {/* 弹出菜单们 */}
@@ -232,11 +238,11 @@ export function TaskSidebar() {
       </Menu>
 
       <Menu anchor={menu?.kind === 'new' ? menu.anchor : null} onClose={() => setMenu(null)}>
-        <MenuItem icon="plus" onClick={() => { store.createTask(); setMenu(null) }}>新建任务 · 当前项目<kbd>⌘N</kbd></MenuItem>
+        <MenuItem icon="plus" onClick={() => { createConversation(); setMenu(null) }}>新建对话 · 当前项目<kbd>⌘N</kbd></MenuItem>
         <div className="tsb-menu-div" />
         <MenuItem icon="folder" onClick={() => { setCreatingProject(true); setMenu(null) }}>新建项目…</MenuItem>
         {projects.filter(p => p.id !== currentProjectId).slice(0, 6).map(p => (
-          <MenuItem key={p.id} onClick={() => { store.createTask(p.id); setMenu(null) }}>在「{p.name}」新建任务</MenuItem>
+          <MenuItem key={p.id} onClick={() => { createConversation(p.id); setMenu(null) }}>在「{p.name}」新建对话</MenuItem>
         ))}
       </Menu>
 
@@ -262,7 +268,7 @@ export function TaskSidebar() {
         </div>
         <div className="tsb-menu-div" />
         <MenuItem icon="settings" onClick={() => { store.openSettings(true); setMenu(null) }}>偏好设置</MenuItem>
-        <MenuItem icon="inbox" onClick={() => { store.focusPending(); setMenu(null) }}>收件箱{pendingBadge > 0 ? `（待办 ${pendingBadge}）` : ''}</MenuItem>
+        <MenuItem icon="inbox" onClick={() => { onWorkOpen(); setMenu(null) }}>待处理事项{pendingBadge > 0 ? `（${pendingBadge}）` : ''}</MenuItem>
         <MenuItem icon="key" onClick={() => { store.setUI({ changePwOpen: true }); setMenu(null) }}>修改密码…</MenuItem>
         <MenuItem icon="moon" onClick={() => { store.setUI({ theme: 'dark' }); setMenu(null) }}>深色主题{theme === 'dark' ? ' · 当前' : ''}</MenuItem>
         <MenuItem icon="sun" onClick={() => { store.setUI({ theme: 'light' }); setMenu(null) }}>浅色主题{theme === 'light' ? ' · 当前' : ''}</MenuItem>
diff --git a/src/components/TopBar.tsx b/src/components/TopBar.tsx
index 068c979..4cd83ab 100644
--- a/src/components/TopBar.tsx
+++ b/src/components/TopBar.tsx
@@ -1,20 +1,52 @@
-// 顶栏：产品标识与待处理铃铛。项目身份在左栏顶部切换器集中显示一次（方案），
-// 阶段徽章随切换器；本栏不再重复。
+// Project identity lives in context; the top bar keeps work/files reachable when panes close.
 import { BrandMark, Icon, pendingCount } from '@ui'
 import { store, useStore } from '../store'
+import type { WorkbenchPane } from '../workbenchLayout'
 
-export function TopBar() {
+interface TopBarProps {
+  compact?: boolean
+  activePane?: WorkbenchPane
+  showReturn?: boolean
+  onContext?: () => void
+  onConversation?: () => void
+  onWork?: () => void
+  onFiles?: () => void
+}
+
+export function TopBar({ compact = false, activePane = 'conversation', showReturn = false,
+  onContext = store.toggleLeft, onConversation,
+  onWork = () => { store.openInbox(); store.setUI({ inboxFilter: 'all', previewExpanded: false }) }, onFiles = store.openFiles,
+}: TopBarProps = {}) {
   const pending = useStore(s => pendingCount(s.cards) + pendingCount(s.projectCards))
+  const ui = useStore(s => s.ui)
+  const returnVisible = showReturn || compact && activePane !== 'conversation'
   return (
-    <header className="topbar">
-      <BrandMark size={22} />
-      <span className="topbar-name">Agent-System</span>
+    <header className={`topbar companion-topbar${compact ? ' compact' : ''}`}>
+      <div className="topbar-identity"><BrandMark size={22} /><span className="topbar-name">工作助手</span></div>
       <span className="topbar-spacer" />
-      <button className="topbar-bell" title={pending > 0 ? `待处理 ${pending}，打开工作入口` : '工作入口'}
-        onClick={() => store.focusPending()}>
-        <Icon name="inbox" size={16} />
-        {pending > 0 && <span className="rail-badge" data-testid="topbar-pending">{pending}</span>}
-      </button>
+      {returnVisible && <button className="shell-return" aria-label="返回对话" onClick={onConversation}>
+        <Icon name="chevron-right" className="shell-back-icon" size={14} /><span>返回对话</span>
+      </button>}
+      <nav className="shell-navigation" aria-label="工作台导航">
+        {compact && <>
+          <button className="shell-nav-button" aria-label="打开上下文" aria-pressed={activePane === 'context'} onClick={onContext}>
+            <Icon name="panel-left" size={15} /><span>上下文</span>
+          </button>
+          <button className="shell-nav-button" aria-label="打开对话" aria-pressed={activePane === 'conversation'} onClick={onConversation}>
+            <Icon name="message" size={15} /><span>对话</span>
+          </button>
+        </>}
+        <button className="shell-nav-button" aria-label="打开工作"
+          aria-pressed={compact ? activePane === 'work' : !ui.rightCollapsed && ui.rightTab === 'work'}
+          title={pending > 0 ? `${pending} 项待处理` : '工作'} onClick={onWork}>
+          <Icon name="inbox" size={15} /><span>工作</span>
+          {pending > 0 && <span className="shell-pending" data-testid="topbar-pending">{pending > 99 ? '99+' : pending}</span>}
+        </button>
+        <button className="shell-nav-button" aria-label="打开文件"
+          aria-pressed={compact ? activePane === 'files' : !ui.rightCollapsed && ui.rightTab === 'files'} onClick={onFiles}>
+          <Icon name="folder" size={15} /><span>文件</span>
+        </button>
+      </nav>
     </header>
   )
 }
diff --git a/src/components/Workbench.tsx b/src/components/Workbench.tsx
index 60fbd78..f05b372 100644
--- a/src/components/Workbench.tsx
+++ b/src/components/Workbench.tsx
@@ -22,6 +22,7 @@ export const docBridge: DocBridge = {
 
 const inboxCallbacks = {
   onAction: (c: ActivityCard, id: string) => store.cardAction(c, id),
+  actionState: (c: ActivityCard) => store.getState().cardActionStates[c.id],
   onPin: (c: ActivityCard, p: boolean) => store.cardPin(c, p),
   onDismiss: (c: ActivityCard) => store.cardDismiss(c),
   onLocate: (c: ActivityCard) => store.locateMessage(c.anchorMessageId),
@@ -52,6 +53,8 @@ function ProjectInbox({ cards, filter }: { cards: ActivityCard[]; filter: InboxF
 }
 
 export function Workbench() {
+  // Subscribe to shared feedback even when no card object has changed yet.
+  useStore(s => s.cardActionStates)
   const rightTab = useStore(s => s.ui.rightTab)
   const cards = useStore(s => s.cards)
   const plan = useStore(s => s.plan)
diff --git a/src/live.ts b/src/live.ts
index 49103f5..160a626 100644
--- a/src/live.ts
+++ b/src/live.ts
@@ -29,7 +29,7 @@ export type LiveItem =
   | { kind: 'check'; passed: boolean; reason: string }
   | { kind: 'final' }
 
-export type LiveTool = Extract<LiveItem, { kind: 'tool' }>
+type LiveTool = Extract<LiveItem, { kind: 'tool' }>
 
 const OUTPUT_TAIL = 4096
 
@@ -246,9 +246,9 @@ export function livePhaseLabel(live: LiveState, now = Date.now()): string {
   return '回复中'
 }
 
-// showProcessInline：运行中时间线始终展开。run 结束后随「自动折叠过程」偏好收成一行。
-export function showProcessInline(live: LiveState | null, autoCollapse: boolean): boolean {
-  return live != null || !autoCollapse
+// 默认阅读层只显示阶段；运行中也把技术记录留给用户主动展开。
+export function showProcessInline(_live: LiveState | null, autoCollapse: boolean): boolean {
+  return !autoCollapse
 }
 
 // hasSettledReply：助手回复落库后，这个 run 的实时气泡才该收起。
diff --git a/src/messageparts.ts b/src/messageparts.ts
index 124fda2..e504126 100644
--- a/src/messageparts.ts
+++ b/src/messageparts.ts
@@ -1,5 +1,5 @@
-// 消息切分：过程时间线 = 从开头到最后一个 process 部件（中间夹着的内容部件留在时间线里）；
-// 最终段 = 它之后的正文与交付卡片。渲染顺序仍是落库顺序，只在这一刀上折叠。
+// 消息切分：技术记录留在过程时间线，正文、错误与文件入口始终直接可读。
+// 两区各自保留落库顺序，后续工具或终轮检查不再把解说藏入折叠区。
 import type { Part } from './contracts'
 
 export interface TimelineSplit {
@@ -7,22 +7,18 @@ export interface TimelineSplit {
   final: Part[]
 }
 
-/** 最后一个 process 部件之前（含自身）是工作时间线，其余是最终回复。
- * promoteLastText：回复区没有正文时，把时间线里最后一段解说提上来。失败或被截断的 run 用它保住可见回复。 */
-export function splitTimeline(parts: Part[], promoteLastText = false): TimelineSplit {
+/** 最后一个 process 部件之前的技术记录留在时间线，其余为可见内容。
+ * 保留旧 promoteLastText 参数以兼容调用方；解说现在始终可见，不再依赖终态提升。 */
+export function splitTimeline(parts: Part[], _promoteLastText = false): TimelineSplit {
   let last = -1
   for (let i = 0; i < parts.length; i++) if (parts[i].process) last = i
   if (last < 0) return { timeline: [], final: parts }
-  const timeline = parts.slice(0, last + 1)
-  const final = parts.slice(last + 1)
-  if (!promoteLastText || final.some(p => p.type === 'text' && (p.text ?? '').trim())) return { timeline, final }
-  let textAt = -1
-  for (let i = timeline.length - 1; i >= 0; i--) {
-    if (timeline[i].type === 'text' && (timeline[i].text ?? '').trim()) { textAt = i; break }
-  }
-  if (textAt < 0) return { timeline, final }
-  const lifted = { ...timeline[textAt], process: undefined }
-  return { timeline: timeline.filter((_, i) => i !== textAt), final: [lifted, ...final] }
+  // text 是公开解说；thinking、工具参数与结果、终轮检查不提升为正文。
+  const visible = (part: Part) => part.type === 'text' || part.type === 'error' || part.type === 'artifact_ref'
+  const before = parts.slice(0, last + 1)
+  const timeline = before.filter(part => !visible(part))
+  const final = [...before.filter(visible), ...parts.slice(last + 1)]
+  return { timeline, final }
 }
 
 /** 同一轮里同名工件只留最新一张，updates 是被折叠掉的次数。 */
diff --git a/src/store.ts b/src/store.ts
index 32e89b8..26c8f8b 100644
--- a/src/store.ts
+++ b/src/store.ts
@@ -109,6 +109,8 @@ interface AppState {
   projectSurfaces: SurfaceMeta[]
   cards: ActivityCard[]
   projectCards: ActivityCard[]
+  /** 同一操作的双入口反馈；未知结果必须先对账，不重新发送副作用。 */
+  cardActionStates: Record<string, 'submitting' | 'unknown'>
   inboxScope: 'conv' | 'project'
   /** runtime.mock：只控制演示指令提示，不改变对话能力。 */
   runtimeMock: boolean
@@ -134,18 +136,20 @@ interface AppState {
   outboxDraining: boolean
   previewTabs: Record<string, PreviewTab[]>
   previewActive: Record<string, string | null>
+  /** Ephemeral explicit opening intent; restoring saved metadata must not advance it. */
+  previewOpenIntent: number
 }
 
 const DEFAULT_UI: UIState = {
   leftWidth: 260,
   leftCollapsed: false,
   rightWidth: 360,
-  rightCollapsed: false,
+  rightCollapsed: true,
   rightTab: 'work',
 filesView: 'list', workspaceSurfacePin: null,
   inboxFilter: 'all',
   activeWorkspace: null,
-  theme: 'dark',
+  theme: 'light',
   fontSize: 14,
   autoCollapseProcess: true,
   settingsOpen: false,
@@ -185,14 +189,14 @@ let state: AppState = {
   contextObs: {},
   projects: [], currentProjectId: null, tasks: [], me: null, currentConvId: null,
   messages: [], runs: [], activeHitl: [], lastSeq: 0, live: null,
-  plan: null, todos: null, artifacts: [], surfaces: [], projectSurfaces: [], cards: [], projectCards: [], inboxScope: 'conv', runtimeMock: false, profiles: [], pluginPanels: [],
+  plan: null, todos: null, artifacts: [], surfaces: [], projectSurfaces: [], cards: [], projectCards: [], cardActionStates: {}, inboxScope: 'conv', runtimeMock: false, profiles: [], pluginPanels: [],
   serverWorkspaces: [],
   rdmAuditAvailable: false,
   rdmRolesAvailable: false, rdmMembersAvailable: false, rdmDocReviewAvailable: false, rdmPermMatrixAvailable: false,
   adminSections: [],
   ui: loadUI(), connected: false, posting: false, error: null, toast: null,
   outbox: [], outboxDraining: false,
-  previewTabs: {}, previewActive: {},
+  previewTabs: {}, previewActive: {}, previewOpenIntent: 0,
 }
 
 const listeners = new Set<() => void>()
@@ -274,6 +278,116 @@ function flashLocate(root: string, attr: string, id: string) {
 let sse: { close: () => void } | null = null
 let projectSse: { close: () => void } | null = null
 let projectSeq = 0
+let conversationEpoch = 0
+let streamSeq = 0
+let detailRequest = 0
+let detailSeq = 0
+let detailVersion = 0
+type DetailObservation = { version: number; seq: number; terminalSeq?: number; terminalVersion?: number }
+let runObservations: Record<string, DetailObservation> = {}
+let messageObservations: Record<string, DetailObservation> = {}
+let hitlObservations: Record<string, DetailObservation> = {}
+let cardsRequest = 0
+let projectCardsRequest = 0
+let cardVersion = 0
+let projectCardVersion = 0
+let cardVersions: Record<string, number> = {}
+let projectCardVersions: Record<string, number> = {}
+let cardPatches: Record<string, Pick<ActivityCard, 'status' | 'tone'>> = {}
+let projectCardPatches: Record<string, Pick<ActivityCard, 'status' | 'tone'>> = {}
+const actionInflight = new Set<string>()
+const actionFeedbackOwners: Record<string, symbol> = {}
+
+function observeDetail(observations: Record<string, DetailObservation>, id: string, seq = state.lastSeq, terminal = false) {
+  const version = ++detailVersion
+  observations[id] = { ...observations[id], version, seq,
+    ...(terminal ? { terminalSeq: seq, terminalVersion: version } : {}) }
+}
+
+function detailRowIsNewer(observations: Record<string, DetailObservation>, id: string, started: number, seq: number) {
+  const observation = observations[id]
+  return observation && (observation.version > started || observation.seq > seq)
+}
+
+function terminalObservationIsNewer(id: string, started: number, seq: number) {
+  const observation = runObservations[id]
+  return (observation?.terminalVersion ?? 0) > started || (observation?.terminalSeq ?? 0) > seq
+}
+
+function mergeDetailRows<T extends { id: string }>(snapshot: T[], current: T[], observations: Record<string, DetailObservation>, started: number, seq: number) {
+  const fresh = current.filter(row => detailRowIsNewer(observations, row.id, started, seq))
+  const byId = new Map(fresh.map(row => [row.id, row]))
+  const snapshotIds = new Set(snapshot.map(row => row.id))
+  return [...snapshot.map(row => byId.get(row.id) ?? row), ...fresh.filter(row => !snapshotIds.has(row.id))]
+}
+
+function scheduleTerminalReconcile() {
+  const convId = state.currentConvId
+  const epoch = conversationEpoch
+  setTimeout(() => {
+    if (state.currentConvId !== convId || conversationEpoch !== epoch) return
+    void store.reconcile().then(() => {
+      if (state.currentConvId === convId && conversationEpoch === epoch) return store.flushOutbox()
+    })
+  }, 250)
+}
+
+// Snapshot queries may overlap events. Only rows changed after the request began
+// override that snapshot; a newer request/context invalidates the old query entirely.
+function mergeCardSnapshot(snapshot: ActivityCard[], current: ActivityCard[], versions: Record<string, number>, started: number,
+  patches: Record<string, Pick<ActivityCard, 'status' | 'tone'>>) {
+  const fresh = current.filter(c => (versions[c.id] ?? 0) > started)
+  const freshIds = new Set(fresh.map(c => c.id))
+  return [...fresh, ...snapshot.filter(c => !freshIds.has(c.id)).map(c =>
+    (versions[c.id] ?? 0) > started && patches[c.id] ? { ...c, ...patches[c.id], tone: patches[c.id].tone ?? c.tone } : c)]
+}
+
+function hitlSource(card: ActivityCard): string | undefined {
+  for (const node of card.body ?? []) {
+    const value = node.type === 'kv' ? node.kv?.find(([key]) => key === '来源')?.[1] : undefined
+    if (value?.startsWith('hitl:')) return value.slice(5)
+  }
+}
+
+function actionFeedback(key: string, value?: 'submitting' | 'unknown', ids: string[] = [], owner?: symbol) {
+  let states: AppState['cardActionStates'] | undefined
+  for (const id of [key, ...ids]) {
+    if (owner && actionFeedbackOwners[id] !== owner) continue
+    const current = states ?? state.cardActionStates
+    if (value ? current[id] === value : !(id in current)) continue
+    states ??= { ...state.cardActionStates }
+    if (value) states[id] = value
+    else { delete states[id]; delete actionFeedbackOwners[id] }
+  }
+  if (states) set({ cardActionStates: states })
+}
+
+function startActionFeedback(key: string, ids: string[] = []) {
+  const owner = Symbol(key)
+  for (const id of [key, ...ids]) actionFeedbackOwners[id] = owner
+  actionFeedback(key, 'submitting', ids, owner)
+  return owner
+}
+
+function settleCardFeedback(cards: ActivityCard[]) {
+  let states: AppState['cardActionStates'] | undefined
+  for (const card of cards) {
+    if (card.status === 'action_required') continue
+    const source = hitlSource(card)
+    for (const id of [card.id, ...(source ? [`hitl:${source}`] : [])]) {
+      if (!(id in (states ?? state.cardActionStates))) continue
+      states ??= { ...state.cardActionStates }
+      delete states[id]
+      delete actionFeedbackOwners[id]
+    }
+  }
+  if (states) set({ cardActionStates: states })
+}
+
+const liveEventTypes = new Set<StreamEvent['type']>([
+  'message.delta', 'thinking.delta', 'tool.call.delta', 'tool.call', 'tool.output',
+  'tool.result', 'run.phase', 'run.check',
+])
 
 export function useStore<T>(selector: (s: AppState) => T): T {
   return useSyncExternalStore(
@@ -326,6 +440,19 @@ export const store = {
   },
 
   async openProject(projectId: string) {
+    if (state.currentProjectId !== projectId) {
+      projectSse?.close(); projectSse = null
+      sse?.close(); sse = null
+      projectSeq = 0
+      projectCardsRequest++
+      projectCardVersion = 0; projectCardVersions = {}; projectCardPatches = {}
+      conversationEpoch++; streamSeq = 0; cardVersion = 0; cardVersions = {}; cardPatches = {}
+      detailSeq = 0; detailVersion = 0; runObservations = {}; messageObservations = {}; hitlObservations = {}
+      set({ currentConvId: null, messages: [], runs: [], activeHitl: [], lastSeq: 0, live: null,
+        cards: [], projectCards: [], plan: null, todos: null, surfaces: [], projectSurfaces: [],
+        artifacts: [], outbox: [], outboxDraining: false, posting: false })
+      setUI({ previewExpanded: false, filesView: 'list' })
+    }
     set({ currentProjectId: projectId })
     if (store.getState().inboxScope === 'project') {
       store.loadProjectCards()
@@ -394,7 +521,11 @@ export const store = {
 
   async openConversation(convId: string) {
     if (sse) { sse.close(); sse = null }
+    const epoch = ++conversationEpoch
+    streamSeq = 0; cardVersion = 0; cardVersions = {}; cardPatches = {}
+    detailSeq = 0; detailVersion = 0; runObservations = {}; messageObservations = {}; hitlObservations = {}
     set({ currentConvId: convId, messages: [], runs: [], activeHitl: [], lastSeq: 0, live: null, plan: null, todos: null, cards: [], surfaces: [], projectSurfaces: [], inboxScope: 'conv', outbox: [], outboxDraining: false, posting: false })
+    setUI({ previewExpanded: false })
     persistConvId(convId)
     // 空态时打开的预览标签（'_' 键）随会话进入一起迁移，不留在不可见的孤儿键下。
     if ((state.previewTabs['_'] ?? []).length > 0) {
@@ -406,9 +537,9 @@ export const store = {
     }
     // U4/R5：已保存页面从权威快照重载（刷新/断线恢复；事件流只做增量投影）。
     // surfaceList 返回扁平 SurfaceMeta，不可写入 surfaces；必须经 surfaceGet 水合为 Snapshot。
-    api.projectSurfaces(state.currentProjectId ?? '').then(list => { if (state.currentConvId === convId) set({ projectSurfaces: list ?? [] }) }).catch(() => {})
+    api.projectSurfaces(state.currentProjectId ?? '').then(list => { if (state.currentConvId === convId && conversationEpoch === epoch) set({ projectSurfaces: list ?? [] }) }).catch(() => {})
     api.surfaceList(convId).then(async list => {
-      if (state.currentConvId !== convId) return
+      if (state.currentConvId !== convId || conversationEpoch !== epoch) return
       const metas = list ?? []
       // 刷新/重进恢复：有页面且尚无页面标签时补开最新一张的标签（不强切
       // 右栏——只在实时事件到达时切换，避免每次进会话劫持视图）。标签只用 Meta。
@@ -426,52 +557,84 @@ export const store = {
       const fetched = await Promise.all(metas.map(m =>
         api.surfaceGet(String(m.surfaceId)).catch(() => null),
       ))
-      if (state.currentConvId !== convId) return
+      if (state.currentConvId !== convId || conversationEpoch !== epoch) return
       const hydrated = fetched.filter((s): s is SurfaceSnapshot => surfaceKey(s) != null)
       // 慢水合不得覆盖并发 surface.updated 已写入的较新 revision。
       set({ surfaces: mergeSurfacesByRevision(state.surfaces, hydrated) })
     }).catch(() => {})
     const resumeSeq = await store.reconcile()
+    if (state.currentConvId !== convId || conversationEpoch !== epoch) return
     store.connectLive(resumeSeq ?? state.lastSeq)
   },
 
   // 终态对账：以 Query 的权威消息树/运行树/游标为准收敛。
   // 返回值是实时流应从这个 seq 之后重放；有进行中的 run 时它早于 lastSeq。
   async reconcile(): Promise<number | undefined> {
-    if (!state.currentConvId) return
+    const convId = state.currentConvId
+    const epoch = conversationEpoch
+    const request = ++detailRequest
+    const started = detailVersion
+    if (!convId) return
     try {
-      const d = await api.conversationDetail(state.currentConvId)
-      const liveRunActive = state.live && !isTerminal(d.runs.find(r => r.id === state.live!.runId)?.status)
+      const d = await api.conversationDetail(convId)
+      if (state.currentConvId !== convId || conversationEpoch !== epoch || request !== detailRequest || d.lastSeq < detailSeq) return
+      // A background frame may overtake this snapshot without changing its
+      // messages/runs. Preserve only newer observations of the same object.
+      const messages = mergeDetailRows(d.messages, state.messages, messageObservations, started, d.lastSeq)
+      const snapshotRuns = new Map(d.runs.map(run => [run.id, run]))
+      const runs = mergeDetailRows(d.runs, state.runs, runObservations, started, d.lastSeq).map(run => {
+        const snapshot = snapshotRuns.get(run.id)
+        const newerTerminal = terminalObservationIsNewer(run.id, started, d.lastSeq)
+        return snapshot && isTerminal(snapshot.status) && !isTerminal(run.status) && !newerTerminal ? snapshot : run
+      })
+      const activeHitl = mergeDetailRows(d.activeHitl, state.activeHitl, hitlObservations, started, d.lastSeq)
+        .filter(card => !detailRowIsNewer(hitlObservations, card.id, started, d.lastSeq) || state.activeHitl.some(c => c.id === card.id))
+      const live = state.live
+      const liveRunActive = live && (!isTerminal(runs.find(r => r.id === live.runId)?.status) ||
+        (terminalObservationIsNewer(live.runId, started, d.lastSeq) && !messages.some(m => m.role === 'assistant' && m.runId === live.runId)))
       const resumeSeq = d.resumeSeq ?? d.lastSeq
+      detailSeq = d.lastSeq
       set({
-        messages: d.messages,
-        runs: d.runs,
-        activeHitl: d.activeHitl,
+        messages,
+        runs,
+        activeHitl,
         lastSeq: Math.max(state.lastSeq, d.lastSeq),
         live: liveRunActive ? state.live : null,
         connected: true,
       })
       const [plan, todos] = await Promise.all([api.getPlan(d.conversation.id), api.getTodos(d.conversation.id)])
-      set({ plan, todos })
+      if (state.currentConvId !== convId || conversationEpoch !== epoch || request !== detailRequest) return
+      if (state.lastSeq === d.lastSeq) set({ plan, todos })
       store.refreshCards(d.conversation.id)
       store.refreshTasks()
       return resumeSeq
     } catch (e) {
-      set({ error: String(e) })
+      if (state.currentConvId === convId && conversationEpoch === epoch) set({ error: String(e) })
     }
   },
 
   connectLive(since?: number) {
     if (!state.currentConvId) return
     const convId = state.currentConvId
+    const epoch = conversationEpoch
+    streamSeq = Math.max(streamSeq, since ?? state.lastSeq)
+    sse?.close()
     sse = connectEvents(convId, since ?? state.lastSeq, {
-      onOpen: () => set({ connected: true }),
-      onError: () => set({ connected: false }),
-      onEvent: e => store.applyEvent(e),
+      onOpen: () => { if (state.currentConvId === convId && conversationEpoch === epoch) set({ connected: true }) },
+      onError: () => { if (state.currentConvId === convId && conversationEpoch === epoch) set({ connected: false }) },
+      onEvent: e => { if (state.currentConvId === convId && conversationEpoch === epoch) store.applyEvent(e) },
     })
   },
 
   applyEvent(e: StreamEvent) {
+    if (!state.currentConvId || e.conversationId !== state.currentConvId || !Number.isFinite(e.seq) || e.seq <= streamSeq) return
+    streamSeq = e.seq
+    const previousSeq = state.lastSeq
+    // Running-turn replay reconstructs transient output, but cannot regress the
+    // persistent card/plan/status snapshot already returned by the detail query.
+    if (e.seq <= previousSeq && !liveEventTypes.has(e.type)) return
+    set({ lastSeq: Math.max(previousSeq, e.seq) })
+    if (e.runId && liveEventTypes.has(e.type)) observeDetail(runObservations, e.runId, e.seq)
     const now = eventTime(e)
     const project = (mutate: (l: LiveState) => void) => touchLive(e.runId ?? '', mutate, now)
     switch (e.type) {
@@ -519,26 +682,33 @@ export const store = {
         break
       }
       case 'hitl.request': {
+        const card = e.payload as HITLCard
+        if (card?.id) {
+          observeDetail(hitlObservations, card.id, e.seq)
+          set({ activeHitl: [...state.activeHitl.filter(c => c.id !== card.id), card] })
+        }
         store.reconcile()
         break
       }
       case 'hitl.resolved': {
-        set({ activeHitl: state.activeHitl.filter(c => c.id !== (e.payload as { cardId: string }).cardId) })
+        const cardId = (e.payload as { cardId: string }).cardId
+        observeDetail(hitlObservations, cardId, e.seq)
+        set({ activeHitl: state.activeHitl.filter(c => c.id !== cardId) })
         break
       }
       case 'agent.spawn': {
         const p = e.payload as { agentRun: string; name: string; task: string }
-        set({ live: project(l => { l.agentNotes = { ...l.agentNotes, [p.agentRun]: `已派生 ${p.name}：${p.task}` } }) })
+        if (state.live) set({ live: { ...state.live, agentNotes: { ...state.live.agentNotes, [p.agentRun]: `已派生 ${p.name}` } } })
         break
       }
       case 'agent.progress': {
         const p = e.payload as { agentRun: string; note?: string }
-        set({ live: project(l => { if (p.note) l.agentNotes = { ...l.agentNotes, [p.agentRun]: p.note! } }) })
+        if (state.live && p.note) set({ live: { ...state.live, agentNotes: { ...state.live.agentNotes, [p.agentRun]: p.note } } })
         break
       }
       case 'agent.result': {
         const p = e.payload as { agentRun: string; summary?: string }
-        set({ live: project(l => { l.agentNotes = { ...l.agentNotes, [p.agentRun]: p.summary ?? '完成' } }) })
+        if (state.live) set({ live: { ...state.live, agentNotes: { ...state.live.agentNotes, [p.agentRun]: p.summary ?? '任务已结束' } } })
         store.reconcile()
         break
       }
@@ -563,22 +733,19 @@ export const store = {
         if (!existing || p.revision > existing.revision) {
           surfaces.push(p)
           set({ surfaces })
-          // 新页面到达：没有页面标签或当前正在看页面 → 开标签并把右栏切到
-          // 文件预览（与 requestPreview 同语义，用户能立刻看到）；否则不抢占
-          // 已打开的对象，但留 toast 痕迹（KTD「新结果不抢占」）。
+          // Only update the title of the page already being read. New background
+          // pages stay in the work list and never open a pane or change selection.
           const conv = previewTabsKey(state.currentConvId)
           const tabs = state.previewTabs[conv] ?? []
           const activeId = state.previewActive[conv] ?? null
-          const hasSurfaceTab = tabs.some(t => t.id.startsWith('surface:'))
-          if (!hasSurfaceTab || (activeId ?? '').startsWith('surface:')) {
+          if (activeId === 'surface:' + id) {
             const opened = openPreviewTab(tabs, { id: 'surface:' + id, name: p.spec?.title || '页面' })
             set({
               previewTabs: { ...state.previewTabs, [conv]: opened.tabs },
               previewActive: { ...state.previewActive, [conv]: opened.activeId },
             })
-            syncFilesEntry(true)
           } else {
-            store.toast(`页面已更新：${p.spec?.title || id}`)
+            store.toast(`新成果可查看：${p.spec?.title || '任务页面'}`)
           }
         }
         break
@@ -591,14 +758,20 @@ export const store = {
       }
       case 'card.status': {
         const p = e.payload as { cardId: string; status: ActivityCard['status']; tone?: string }
+        cardVersions[p.cardId] = ++cardVersion
+        cardPatches[p.cardId] = { status: p.status, tone: p.tone }
         const cards = state.cards.map(c => c.id === p.cardId ? { ...c, status: p.status, tone: p.tone ?? c.tone } : c)
         set({ cards })
+        settleCardFeedback(cards)
         break
       }
       case 'card.resolved': {
         const p = e.payload as { cardId: string }
+        cardVersions[p.cardId] = ++cardVersion
+        cardPatches[p.cardId] = { status: 'resolved' }
         const cards = state.cards.map(c => c.id === p.cardId ? { ...c, status: 'resolved' as const } : c)
         set({ cards })
+        settleCardFeedback(cards)
         break
       }
       case 'artifact.created':
@@ -614,17 +787,19 @@ export const store = {
         break
       }
       case 'run.completed': {
+        if (e.runId) observeDetail(runObservations, e.runId, e.seq, true)
         const p = e.payload as { usage?: unknown; context?: ContextObs }
         if (p?.context && e.runId) {
           set({ contextObs: { ...state.contextObs, [e.runId]: p.context } })
         }
-        setTimeout(() => { void store.reconcile().then(() => store.flushOutbox()) }, 250)
+        scheduleTerminalReconcile()
         break
       }
       case 'run.failed':
       case 'error': {
+        if (e.runId && e.type === 'run.failed') observeDetail(runObservations, e.runId, e.seq, true)
         // 终态：短暂延迟后对账（等待消息树落库），折叠过程输出，再发送排队消息。
-        setTimeout(() => { void store.reconcile().then(() => store.flushOutbox()) }, 250)
+        scheduleTerminalReconcile()
         break
       }
       default: {
@@ -635,11 +810,15 @@ export const store = {
   },
 
   async sendMessage(text: string, attachmentIds: string[], requestId?: string): Promise<'ok' | 'busy'> {
-    if (!state.currentConvId) return 'ok'
+    const convId = state.currentConvId
+    const epoch = conversationEpoch
+    const sameContext = () => state.currentConvId === convId && conversationEpoch === epoch
+    if (!convId) return 'ok'
     const id = requestId ?? newQueuedMessage(text, attachmentIds, []).id
     set({ posting: true })
     try {
-      const out = await api.sendMessage(state.currentConvId, text, attachmentIds, id)
+      const out = await api.sendMessage(convId, text, attachmentIds, id)
+      if (!sameContext()) return 'ok'
       if (out.command) {
         store.toast(out.reply ?? `命令 ${out.command} 已执行`)
         if (out.conversation) await store.openConversation(out.conversation.id)
@@ -649,6 +828,8 @@ export const store = {
       }
       if (out.run) {
         const started = out.run
+        observeDetail(runObservations, started.id)
+        observeDetail(messageObservations, out.message.id)
         // 立刻把 run 合进列表，停止/排队不必等终态对账。已有同 id 记录保持不动。
         const runs = mergeStartedRun(state.runs, started)
         const messages = state.messages.some(m => m.id === out.message.id)
@@ -669,6 +850,7 @@ export const store = {
       }
       return 'ok'
     } catch (e) {
+      if (!sameContext()) return 'ok'
       if (isConversationBusy(e)) {
         set({ outbox: enqueueMessageFront(state.outbox, { id, text, attachmentIds, attachmentNames: [] }) })
         return 'busy'
@@ -677,7 +859,7 @@ export const store = {
       await store.reconcile()
       return 'ok'
     } finally {
-      set({ posting: false })
+      if (sameContext()) set({ posting: false })
     }
   },
 
@@ -736,45 +918,124 @@ export const store = {
   },
 
   async resolveHITL(cardId: string, resp: { choiceId?: string; freeText?: string }) {
+    const key = `hitl:${cardId}`
+    const related = [...state.cards, ...state.projectCards].filter(c => hitlSource(c) === cardId).map(c => c.id)
+    if (actionInflight.has(key) || state.cardActionStates[key]) return
+    const convId = state.currentConvId
+    const epoch = conversationEpoch
+    actionInflight.add(key)
+    const feedbackOwner = startActionFeedback(key, related)
     try {
       const out = await api.resolveHITL(cardId, resp)
+      if (state.currentConvId !== convId || conversationEpoch !== epoch) return
+      if (!out.resolved) {
+        actionFeedback(key, 'unknown', related, feedbackOwner)
+        await store.reconcile()
+        return
+      }
       set({ activeHitl: state.activeHitl.filter(c => c.id !== cardId) })
+      // Resolution is not necessarily execution: fetch the actual confirmation
+      // outcome (including cancellation) instead of stamping every choice resolved.
+      if (convId) await store.refreshCards(convId)
+      if (state.currentConvId !== convId || conversationEpoch !== epoch) return
+      actionFeedback(key, undefined, [], feedbackOwner)
+      for (const id of related) {
+        const current = [...state.cards, ...state.projectCards].find(c => c.id === id)
+        actionFeedback(id, current?.status === 'action_required' ? 'unknown' : undefined, [], feedbackOwner)
+      }
       if (out.pivoted && out.pivotText) {
         await store.sendMessage(out.pivotText, [])
       }
     } catch (e) {
-      store.toast(`HITL 解析失败：${e}`)
+      const rejected = /^4\d\d:/.test(String(e instanceof Error ? e.message : e))
+      actionFeedback(key, rejected ? undefined : 'unknown', related, feedbackOwner)
+      if (state.currentConvId !== convId || conversationEpoch !== epoch) return
+      if (rejected) {
+        store.toast('本次确认未被接受，请查看当前事项后再处理')
+      } else {
+        store.toast('确认结果暂时未知，正在核实处理状态')
+        await store.reconcile()
+      }
+    } finally {
+      actionInflight.delete(key)
     }
   },
 
   upsertCard(card: ActivityCard) {
+    if (card.conversationId && card.conversationId !== state.currentConvId) return
+    cardVersions[card.id] = ++cardVersion
+    delete cardPatches[card.id]
     const i = state.cards.findIndex(c => c.id === card.id)
     const cards = i >= 0 ? state.cards.map(c => c.id === card.id ? card : c) : [card, ...state.cards]
     set({ cards })
+    settleCardFeedback([card])
   },
 
   async refreshCards(convId: string) {
-    try { set({ cards: await api.listCards(convId) }) } catch { /* 会话竞态，静默 */ }
+    const epoch = conversationEpoch
+    const request = ++cardsRequest
+    const started = cardVersion
+    try {
+      const snapshot = await api.listCards(convId)
+      if (state.currentConvId !== convId || conversationEpoch !== epoch || request !== cardsRequest) return
+      const cards = mergeCardSnapshot(snapshot, state.cards, cardVersions, started, cardPatches)
+      set({ cards })
+      settleCardFeedback(cards)
+    } catch { /* Keep the last observed snapshot while disconnected. */ }
   },
 
   // 卡片动作：确认投影卡（来源 hitl:）路由回 HITL 解析（恢复挂起 run，服务端同步销项）；
   // 其余卡走卡片动作 API，并把服务端持久化的回执消息追加进本地时间线（id 一致，对账不重复）。
   async cardAction(card: ActivityCard, actionId: string, freeText?: string) {
-    const hitlRef = card.body?.find(n => n.type === 'kv')?.kv?.find(([k]) => k === '来源')?.[1]
-    if (hitlRef?.startsWith('hitl:')) {
-      await store.resolveHITL(hitlRef.slice(5), actionId ? { choiceId: actionId } : { freeText })
+    const source = hitlSource(card)
+    if (source) {
+      await store.resolveHITL(source, actionId ? { choiceId: actionId } : { freeText })
       return
     }
+    if (actionInflight.has(card.id) || state.cardActionStates[card.id]) return
+    const convId = state.currentConvId
+    const pid = state.currentProjectId
+    const epoch = conversationEpoch
+    const startedVersion = card.conversationId === state.currentConvId ? cardVersion : projectCardVersion
+    const sameContext = () => state.currentProjectId === pid && (!card.conversationId || (state.currentConvId === convId && conversationEpoch === epoch))
+    actionInflight.add(card.id)
+    const feedbackOwner = startActionFeedback(card.id)
     try {
       const out = await api.cardAction(card.id, actionId, freeText)
-      store.upsertCard(out.card)
-      if (out.receipt) set({ messages: [...state.messages, out.receipt as Message] })
+      if (!sameContext()) return
+      const newer = (card.conversationId === state.currentConvId ? cardVersions[card.id] : projectCardVersions[card.id]) > startedVersion
+      if (!newer && card.conversationId === state.currentConvId) store.upsertCard(out.card)
+      else if (!newer) {
+        projectCardVersions[out.card.id] = ++projectCardVersion
+        const cards = state.projectCards
+        set({ projectCards: cards.some(c => c.id === out.card.id) ? cards.map(c => c.id === out.card.id ? out.card : c) : [out.card, ...cards] })
+      }
+      if (out.receipt && out.receipt.conversationId === state.currentConvId && !state.messages.some(m => m.id === out.receipt?.id)) {
+        observeDetail(messageObservations, out.receipt.id)
+        set({ messages: [...state.messages, out.receipt as Message] })
+      }
       // 命令确认卡的动作响应是决议前快照。再拉一次，内联卡才能从待确认过渡到折叠。
-      if (card.kind === 'confirm' && actionId !== 'recheck' && out.card.status === 'action_required' && card.conversationId) {
-        await store.refreshCards(card.conversationId)
+      if (!newer && card.kind === 'confirm' && actionId !== 'recheck' && out.card.status === 'action_required' && card.conversationId) {
+        if (card.conversationId === state.currentConvId) await store.refreshCards(card.conversationId)
+        else await store.loadProjectCards()
+      }
+      if (sameContext()) {
+        const current = [...state.cards, ...state.projectCards].find(c => c.id === card.id)
+        actionFeedback(card.id, actionId !== 'recheck' && current?.status === 'action_required' ? 'unknown' : undefined, [], feedbackOwner)
       }
     } catch (e) {
-      store.toast(`操作失败：${e}`)
+      const rejected = /^4\d\d:/.test(String(e instanceof Error ? e.message : e))
+      actionFeedback(card.id, rejected ? undefined : 'unknown', [], feedbackOwner)
+      if (!sameContext()) return
+      if (rejected) {
+        store.toast('本次操作未被接受，请查看当前事项后再处理')
+      } else {
+        store.toast('操作结果暂时未知，正在核实处理状态')
+        if (card.conversationId === state.currentConvId) await store.refreshCards(card.conversationId)
+        else await store.loadProjectCards()
+      }
+    } finally {
+      actionInflight.delete(card.id)
     }
   },
 
@@ -789,6 +1050,7 @@ export const store = {
   async refreshArtifacts(projectId: string) {
     try {
       const artifacts = await api.listArtifacts(projectId)
+      if (state.currentProjectId !== projectId) return
       set({ artifacts })
     } catch { /* 项目删除竞态等，静默 */ }
   },
@@ -831,14 +1093,16 @@ export const store = {
   },
 
   async uploadAttachment(file: File): Promise<string | null> {
-    if (!state.currentProjectId) return null
+    const pid = state.currentProjectId
+    if (!pid) return null
     try {
-      const up = await api.upload(state.currentProjectId, file)
-      store.toast(`已上传 ${up.filename}${up.parsed ? `（解析：${up.parsed.meta.parser}）` : ''}`)
-      await store.refreshArtifacts(state.currentProjectId)
+      const up = await api.upload(pid, file)
+      if (state.currentProjectId !== pid) return null
+      store.toast(`已收到材料：${up.filename}${up.parsed ? ' · 已读取内容' : ''}`)
+      await store.refreshArtifacts(pid)
       return up.artifactId
     } catch (e) {
-      store.toast(`上传失败：${e}`)
+      if (state.currentProjectId === pid) store.toast('材料未能上传，请检查文件后重新选择')
       return null
     }
   },
@@ -852,7 +1116,15 @@ export const store = {
   async loadProjectCards() {
     const pid = store.getState().currentProjectId
     if (!pid) return
-    try { set({ projectCards: await api.listProjectCards(pid) }) } catch { /* 静默：切项目竞态 */ }
+    const request = ++projectCardsRequest
+    const started = projectCardVersion
+    try {
+      const snapshot = await api.listProjectCards(pid)
+      if (state.currentProjectId !== pid || request !== projectCardsRequest) return
+      const projectCards = mergeCardSnapshot(snapshot, state.projectCards, projectCardVersions, started, projectCardPatches)
+      set({ projectCards })
+      settleCardFeedback(projectCards)
+    } catch { /* Keep existing readable content while reconnecting. */ }
   },
 
   setInboxScope(scope: 'conv' | 'project') {
@@ -870,15 +1142,19 @@ export const store = {
     const pid = store.getState().currentProjectId
     if (!pid) return
     projectSse?.close()
-    projectSse = connectEvents('', projectSeq, { onEvent: e => store.applyProjectEvent(e) }, pid)
+    projectSse = connectEvents('', projectSeq, { onEvent: e => { if (state.currentProjectId === pid) store.applyProjectEvent(e) } }, pid)
   },
 
   applyProjectEvent(e: StreamEvent) {
-    projectSeq = Math.max(projectSeq, e.seq)
+    if (!Number.isFinite(e.seq) || e.seq <= projectSeq) return
+    projectSeq = e.seq
     const upsert = (card: ActivityCard) => {
+      if (card.projectId !== state.currentProjectId) return
+      projectCardVersions[card.id] = ++projectCardVersion
       const list = store.getState().projectCards
       const i = list.findIndex(c => c.id === card.id)
       set({ projectCards: i >= 0 ? list.map(c => (c.id === card.id ? card : c)) : [card, ...list] })
+      settleCardFeedback([card])
     }
     switch (e.type) {
       case 'card.created':
@@ -887,14 +1163,20 @@ export const store = {
         break
       case 'card.status': {
         const p = e.payload as { cardId: string; status: ActivityCard['status']; tone?: string }
+        projectCardVersions[p.cardId] = ++projectCardVersion
+        projectCardPatches[p.cardId] = { status: p.status, tone: p.tone }
         const list = store.getState().projectCards
         set({ projectCards: list.map(c => (c.id === p.cardId ? { ...c, status: p.status, tone: p.tone ?? c.tone } : c)) })
+        settleCardFeedback(state.projectCards)
         break
       }
       case 'card.resolved': {
         const p = e.payload as { cardId: string }
+        projectCardVersions[p.cardId] = ++projectCardVersion
+        projectCardPatches[p.cardId] = { status: 'resolved' }
         const list = store.getState().projectCards
         set({ projectCards: list.map(c => (c.id === p.cardId ? { ...c, status: 'resolved' as const } : c)) })
+        settleCardFeedback(state.projectCards)
         break
       }
     }
@@ -939,6 +1221,7 @@ export const store = {
   // 卡→消息互定位另一半（D32）：从收件箱卡滚回产生它的对话消息。
   locateMessage(messageId?: string) {
     if (!messageId) return
+    setUI({ rightCollapsed: true, previewExpanded: false })
     setTimeout(() => flashLocate('.chat', 'data-msg-id', messageId), 60)
   },
   openTracker(runId: string) { setUI({ trackerRunId: runId }) },
@@ -952,6 +1235,7 @@ export const store = {
     set({
       previewTabs: { ...state.previewTabs, [conv]: opened.tabs },
       previewActive: { ...state.previewActive, [conv]: opened.activeId },
+      previewOpenIntent: state.previewOpenIntent + 1,
     })
     syncFilesEntry(true)
   },
@@ -963,6 +1247,7 @@ export const store = {
     set({
       previewTabs: { ...state.previewTabs, [conv]: opened.tabs },
       previewActive: { ...state.previewActive, [conv]: opened.activeId },
+      previewOpenIntent: state.previewOpenIntent + 1,
     })
     syncFilesEntry(true)
   },
@@ -1016,6 +1301,8 @@ export const store = {
 }
 
 function touchLive(_runId: string, mutate: (l: LiveState) => void, now = Date.now()): LiveState | null {
+  if (state.runs.find(r => r.id === _runId)?.kind === 'subagent') return state.live
+  if (state.live && state.live.runId !== _runId && !isTerminal(state.runs.find(r => r.id === state.live?.runId)?.status)) return state.live
   const base = state.live ?? { runId: _runId, phase: 'thinking', items: [], agentNotes: {}, startedAt: now }
   const next: LiveState = { ...base, agentNotes: { ...base.agentNotes } }
   mutate(next)
diff --git a/src/surface.test.ts b/src/surface.test.ts
index 158c228..9d25eed 100644
--- a/src/surface.test.ts
+++ b/src/surface.test.ts
@@ -8,9 +8,9 @@ import type { StreamEvent, SurfaceMeta, SurfaceSnapshot } from './contracts'
 // U4/R5：surface.updated 投影的 revision 守卫——旧修订/重复事件不得覆盖新修订；
 // 服务端快照是唯一权威（KTD8 单一状态所有者）。
 
-function surfEvent(seq: number, surfaceId: string, revision: number, title: string): StreamEvent<SurfaceSnapshot> {
+function surfEvent(seq: number, surfaceId: string, revision: number, title: string, conversationId = 'c1'): StreamEvent<SurfaceSnapshot> {
   return {
-    seq, conversationId: 'c1', ts: new Date().toISOString(), v: 1, type: 'surface.updated',
+    seq, conversationId, ts: new Date().toISOString(), v: 1, type: 'surface.updated',
     payload: {
       identity: { surfaceId, owner: 'alice', pluginId: 'generative-ui', conversationId: 'c1' },
       compat: { schemaVersion: 1, catalogVersion: 'ui-v1' },
@@ -20,6 +20,24 @@ function surfEvent(seq: number, surfaceId: string, revision: number, title: stri
   }
 }
 
+beforeEach(async () => {
+  vi.spyOn(api, 'projectSurfaces').mockResolvedValue([])
+  vi.spyOn(api, 'surfaceList').mockResolvedValue([])
+  vi.spyOn(api, 'conversationDetail').mockImplementation(async id => ({
+    conversation: { id, projectId: 'p1', title: id, createdAt: '', updatedAt: '' },
+    messages: [], runs: [], activeHitl: [], lastSeq: 0,
+  }))
+  vi.spyOn(api, 'getPlan').mockResolvedValue(null)
+  vi.spyOn(api, 'getTodos').mockResolvedValue(null)
+  vi.spyOn(api, 'listCards').mockResolvedValue([])
+  vi.spyOn(api, 'listTasks').mockResolvedValue([])
+  vi.spyOn(apiModule, 'connectEvents').mockReturnValue({ close: () => {} })
+  await store.openConversation('c1')
+  for (const tab of store.getState().previewTabs.c1 ?? []) store.closePreview(tab.id)
+  store.setUI({ rightTab: 'work', rightCollapsed: true, filesView: 'list' })
+})
+afterEach(() => vi.restoreAllMocks())
+
 describe('surface.updated projection', () => {
   it('新事件入库；旧修订与重复事件不覆盖', () => {
     store.applyEvent(surfEvent(1, 's1', 1, '初版'))
@@ -33,6 +51,7 @@ describe('surface.updated projection', () => {
   })
 
   it('多页面并存，互不覆盖', () => {
+    store.applyEvent(surfEvent(1, 's1', 1, '页面一'))
     store.applyEvent(surfEvent(5, 's2', 1, '页面二'))
     const list = store.getState().surfaces
     expect(list.filter(x => String(x.identity.surfaceId) === 's1')).toHaveLength(1)
@@ -42,14 +61,17 @@ describe('surface.updated projection', () => {
 
 
 describe('surface.updated 可见性联动', () => {
-  it('自动开标签时右栏切到文件预览（syncFilesEntry 语义）', () => {
+  it('keeps new background pages available without opening the file pane', () => {
     store.applyEvent(surfEvent(101, 'sv1', 1, '可见性页'))
     const ui = store.getState().ui
-    expect(ui.rightTab).toBe('files')
-    expect(ui.rightCollapsed).toBe(false)
-    expect(ui.filesView).toBe('preview')
+    expect(ui.rightTab).toBe('work')
+    expect(ui.rightCollapsed).toBe(true)
+    expect(ui.filesView).toBe('list')
     const tabs = store.getState().previewTabs[previewTabsKey(store.getState().currentConvId)] ?? []
-    expect(tabs.some(t => t.id === 'surface:sv1')).toBe(true)
+    expect(tabs.some(t => t.id === 'surface:sv1')).toBe(false)
+    store.openSurface('sv1')
+    expect(store.getState().ui.rightTab).toBe('files')
+    expect(store.getState().previewActive.c1).toBe('surface:sv1')
   })
 
   it('抑制开标签时留 toast 痕迹', () => {
@@ -131,7 +153,7 @@ describe('saved surfaces on conversation reload', () => {
     vi.mocked(api.surfaceList).mockResolvedValue([meta('racing')])
     vi.mocked(api.surfaceGet).mockReturnValue(new Promise<SurfaceSnapshot>(r => { resolve = r }))
     await store.openConversation('race')
-    store.applyEvent(surfEvent(301, 'racing', 2, 'live revision'))
+    store.applyEvent(surfEvent(301, 'racing', 2, 'live revision', 'race'))
     resolve(snapshot('racing', 1))
     await new Promise<void>(r => setTimeout(r, 0))
     expect(store.getState().surfaces).toHaveLength(1)
diff --git a/src/workbenchLayout.ts b/src/workbenchLayout.ts
new file mode 100644
index 0000000..11b2e8a
--- /dev/null
+++ b/src/workbenchLayout.ts
@@ -0,0 +1,69 @@
+export interface WorkbenchLayoutOptions {
+  width: number
+  contextOpen: boolean
+  leftCollapsed: boolean
+  rightCollapsed: boolean
+  leftWidth: number
+  rightWidth: number
+  previewWidth: number
+  rightTab: 'work' | 'files'
+  filesView: 'list' | 'preview'
+  previewOpen: boolean
+  previewExpanded: boolean
+}
+
+export type WorkbenchPane = 'context' | 'conversation' | 'work' | 'files'
+const COMPACT_WORKBENCH_WIDTH = 1024
+
+function boundedWidth(value: number, fallback: number, min: number, max: number) {
+  return Math.min(max, Math.max(min, Number.isFinite(value) ? value : fallback))
+}
+
+// Only the rendered widths are bounded. Saved desktop preferences stay in the store.
+export function selectWorkbenchLayout(options: WorkbenchLayoutOptions) {
+  const width = Number.isFinite(options.width) ? Math.max(0, options.width) : 1440
+  const available = Math.max(0, width - 8)
+  const compact = width < COMPACT_WORKBENCH_WIDTH
+  const filesWide = options.rightTab === 'files' && options.filesView === 'preview' && options.previewOpen
+  const previewExpanded = filesWide && options.previewExpanded && !options.rightCollapsed
+  if (compact) {
+    const pane: WorkbenchPane = options.contextOpen ? 'context' : options.rightCollapsed ? 'conversation' : options.rightTab
+    return {
+      compact, pane, showContext: pane === 'context', showConversation: pane === 'conversation',
+      showRight: pane === 'work' || pane === 'files', contextCollapsed: false, previewExpanded,
+      leftWidth: pane === 'context' ? available : 0,
+      rightWidth: pane === 'work' || pane === 'files' ? available : 0,
+      leftDivider: false, rightDivider: false,
+    }
+  }
+
+  const showRight = !options.rightCollapsed
+  const leftDivider = !options.leftCollapsed
+  const rightDivider = showRight && !previewExpanded
+  const panelCount = 1 + Number(!previewExpanded) + Number(showRight)
+  const gutters = (panelCount - 1) * 4 + (Number(leftDivider) + Number(rightDivider)) * 8
+  const leftMin = options.leftCollapsed ? 52 : 220
+  const rightMin = showRight ? filesWide ? 420 : 280 : 0
+  let leftWidth = options.leftCollapsed ? 52 : boundedWidth(options.leftWidth, 260, leftMin, 420)
+  let rightWidth = showRight
+    ? filesWide ? boundedWidth(options.previewWidth, 700, rightMin, 1100) : boundedWidth(options.rightWidth, 360, rightMin, 560)
+    : 0
+  if (previewExpanded) rightWidth = available - gutters - leftWidth
+  else {
+    const conversationMin = filesWide && showRight ? 320 : 360
+    const budget = available - gutters - conversationMin
+    if (leftWidth + rightWidth > budget) {
+      const extraLeft = leftWidth - leftMin
+      const extraRight = rightWidth - rightMin
+      const ratio = Math.max(0, budget - leftMin - rightMin) / (extraLeft + extraRight || 1)
+      leftWidth = leftMin + Math.floor(extraLeft * ratio)
+      rightWidth = rightMin + Math.floor(extraRight * ratio)
+    }
+  }
+  const pane: WorkbenchPane = previewExpanded ? 'files' : 'conversation'
+  return {
+    compact, pane,
+    showContext: true, showConversation: !previewExpanded, showRight, contextCollapsed: options.leftCollapsed,
+    previewExpanded, leftWidth, rightWidth, leftDivider, rightDivider,
+  }
+}
diff --git a/test/conversation-work.test.ts b/test/conversation-work.test.ts
new file mode 100644
index 0000000..fdb64d2
--- /dev/null
+++ b/test/conversation-work.test.ts
@@ -0,0 +1,266 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import { createElement } from 'react'
+import { renderToStaticMarkup } from 'react-dom/server'
+import { setPersistedOpen } from '@ui'
+import type { ActivityCard, HITLCard, Message } from '../src/contracts'
+import { Conversation } from '../src/components/Conversation'
+import { ConversationWork } from '../src/components/ConversationWork'
+import { ProcessTimeline } from '../src/components/ProcessTimeline'
+import { store, type LiveState } from '../src/store'
+
+// SSR has no browser subscription snapshot. Keep the production store/actions and
+// real UI renderers; substitute only the hook boundary with a complete snapshot.
+const snapshot = vi.hoisted(() => ({ state: undefined as ReturnType<typeof store.getState> | undefined }))
+vi.mock('../src/store', async importOriginal => {
+  const actual = await importOriginal<typeof import('../src/store')>()
+  return { ...actual, useStore: (select: (s: ReturnType<typeof store.getState>) => unknown) => select(snapshot.state!) }
+})
+
+const timestamp = '2026-10-12T10:00:00Z'
+function card(over: Partial<ActivityCard> = {}): ActivityCard {
+  return {
+    id: 'card_1', projectId: 'prj_1', conversationId: 'cnv_1',
+    kind: 'progress', title: '整理项目材料', status: 'active', tone: 'info',
+    body: [{ type: 'kv', kv: [['状态', '进行中'], ['正在做', '核对会议结论'], ['材料键', 'private-material-key']] }],
+    createdAt: timestamp, updatedAt: timestamp, ...over,
+  }
+}
+function reply(parts: Message['parts']): Message {
+  return { id: 'msg_1', conversationId: 'cnv_1', role: 'assistant', runId: 'run_1', createdAt: timestamp, parts }
+}
+function hitl(over: Partial<HITLCard> = {}): HITLCard {
+  return { id: 'hitl_detail1', runId: 'run_1', conversationId: 'cnv_1', kind: 'confirm',
+    question: '执行工具 run_shell？', detail: '{"command":"printf confirm-record"}',
+    choices: [{ id: 'yes', label: '执行', description: '按已确认的参数调用', impact: '会访问外部资源并返回结果' },
+      { id: 'no', label: '取消', description: '跳过本次调用', impact: '不会执行本次操作' }],
+    allowFreeInput: false, createdAt: timestamp, resolved: false, ...over }
+}
+function render() { return renderToStaticMarkup(createElement(Conversation)) }
+function renderWork() { return renderToStaticMarkup(createElement(ConversationWork)) }
+function completedResults(): ActivityCard[] {
+  // The host lists cards newest-first; submit_card publishes markdown results.
+  return [
+    card({ id: 'result_latest', kind: 'result', title: '最新整理成果', status: 'done', tone: 'ok',
+      updatedAt: '2026-10-12T12:00:00Z', body: [{ type: 'markdown', markdown: '最新成果的主要结论' }] }),
+    card({ id: 'result_older', kind: 'result', title: '先前整理成果', status: 'done', tone: 'ok', pinned: true,
+      updatedAt: '2026-10-12T10:00:00Z', body: [{ type: 'markdown', markdown: '先前成果的主要结论' }] }),
+  ]
+}
+
+beforeEach(() => {
+  setPersistedOpen('hitl-details:cnv_1:hitl_detail1', false)
+  setPersistedOpen('conversation-work:prj_1:cnv_1', false)
+  const base = store.getState()
+  snapshot.state = {
+    ...base, currentProjectId: 'prj_1', currentConvId: 'cnv_1', connected: true,
+    tasks: [{ id: 'cnv_1', projectId: 'prj_1', title: '讨论项目', createdAt: timestamp, updatedAt: timestamp }],
+    messages: [], cards: [], runs: [], activeHitl: [], live: null, artifacts: [], outbox: [], posting: false,
+    ui: { ...base.ui, rightCollapsed: true, autoCollapseProcess: true },
+    cardActionStates: {},
+  }
+})
+
+describe('conversation work reading', () => {
+  it('keeps ordinary Q&A free of an empty progress object', () => {
+    snapshot.state!.messages = [reply([{ type: 'text', text: '可以先确定项目目标' }])]
+    const html = render()
+    expect(html).toContain('可以先确定项目目标')
+    expect(html).not.toContain('data-conversation-work')
+    expect(html).not.toContain('data-testid="input-status"')
+  })
+
+  it('shows the current real work with the auxiliary pane closed', () => {
+    snapshot.state!.cards = [card()]
+    const html = render()
+    expect(html).toContain('整理项目材料')
+    expect(html).toContain('核对会议结论')
+    expect(html).not.toContain('private-material-key')
+  })
+
+  it('shows the newest completed result by default with older results in closed history', () => {
+    snapshot.state!.cards = completedResults()
+    const html = renderWork()
+    expect(html).toContain('data-card-id="result_latest"')
+    expect(html).toContain('最新成果的主要结论')
+    expect(html).not.toContain('data-card-id="result_older"')
+    expect(html).not.toContain('先前成果的主要结论')
+    expect(html).toContain('更多工作与成果 · 1 项')
+
+    setPersistedOpen('conversation-work:prj_1:cnv_1', true)
+    expect(renderWork()).toContain('先前成果的主要结论')
+  })
+
+  it('keeps the newest result ahead of an already resolved confirmation', () => {
+    snapshot.state!.cards = [card({ id: 'confirm_resolved', kind: 'confirm', status: 'resolved', title: '已处理确认',
+      updatedAt: '2026-10-12T13:00:00Z' }), ...completedResults()]
+    const html = renderWork()
+    expect(html).toContain('最新成果的主要结论')
+    expect(html).not.toContain('data-card-id="confirm_resolved"')
+    expect(html).toContain('更多工作与成果 · 2 项')
+  })
+
+  it.each([false, true])('keeps active work ahead of completed results (pinned=%s)', pinned => {
+    const [latest, older] = completedResults()
+    snapshot.state!.cards = [latest, card({ id: 'work_active', title: '正在核验材料',
+      updatedAt: '2026-10-12T11:00:00Z',
+      body: [{ type: 'kv', kv: [['正在做', '核对活动工作的结论']] }] }), older]
+    if (pinned) snapshot.state!.cards.push(card({ id: 'work_pinned', pinned: true, title: '优先核验材料',
+      updatedAt: '2026-10-12T09:00:00Z',
+      body: [{ type: 'kv', kv: [['正在做', '核对固定工作的结论']] }] }))
+    const html = renderWork()
+    expect(html).toContain(pinned ? '核对固定工作的结论' : '核对活动工作的结论')
+    expect(html).not.toContain('data-card-id="result_latest"')
+    expect(html).not.toContain('data-card-id="result_older"')
+    if (pinned) expect(html).not.toContain('data-card-id="work_active"')
+  })
+
+  it('keeps the newest completed result as a compact anchor with the auxiliary pane open', () => {
+    snapshot.state!.ui.rightCollapsed = false
+    snapshot.state!.cards = completedResults()
+    const html = renderWork()
+    expect(html).toContain('最新整理成果 · 查看摘要')
+    expect(html).not.toContain('最新成果的主要结论')
+    expect(html).not.toContain('先前整理成果')
+  })
+
+  it('keeps a compact work anchor when the same summary is visible in the right pane', () => {
+    snapshot.state!.ui.rightCollapsed = false
+    snapshot.state!.cards = [card()]
+    const html = render()
+    expect(html).toContain('整理项目材料')
+    expect(html).not.toContain('核对会议结论')
+    snapshot.state!.ui.rightCollapsed = true
+    expect(render()).toContain('核对会议结论')
+  })
+
+  it('keeps secondary message operations available through progressive disclosure', () => {
+    snapshot.state!.messages = [reply([{ type: 'text', text: '已经整理好要点' }])]
+    const html = render()
+    expect(html).toContain('已经整理好要点')
+    expect(html).toContain('消息操作')
+    expect(html).not.toContain('排除出上下文')
+    expect(html).not.toContain('重新生成')
+  })
+
+  it('keeps failure impact and coverage limits visible without expanding history', () => {
+    snapshot.state!.cards = [card({ status: 'failed', tone: 'danger', body: [
+      { type: 'kv', kv: [['状态', '失败'], ['当前发现', '已整理两份材料'], ['剩余', '评审意见未能读取，完整结论尚未生成']] },
+    ] })]
+    const html = render()
+    expect(html).toContain('已整理两份材料')
+    expect(html).toContain('评审意见未能读取，完整结论尚未生成')
+  })
+
+  it('keeps a completed result limitation visible while another task is active', () => {
+    snapshot.state!.cards = [card(), card({ id: 'card_partial', status: 'done', tone: 'warn', title: '已整理部分材料',
+      body: [{ type: 'kv', kv: [['当前发现', '两份材料已整理'], ['剩余', '第三份材料未能读取，请补充清晰版本']] }],
+    })]
+    const html = render()
+    expect(html).toContain('第三份材料未能读取，请补充清晰版本')
+  })
+
+  it('hides running command records while keeping the final reply readable', () => {
+    const live: LiveState = { runId: 'run_1', phase: 'responding', startedAt: Date.now(), agentNotes: {}, items: [
+      { kind: 'tool', name: 'run_shell', callId: 'call_1', args: 'secret-command-argument', output: 'raw-command-output', state: 'running', startedAt: Date.now(), endedAt: 0 },
+      { kind: 'final' }, { kind: 'text', index: 1, text: '已找到需要补充的两项要求' },
+    ] }
+    snapshot.state!.live = live
+    const html = render()
+    expect(html).toContain('已找到需要补充的两项要求')
+    expect(html).not.toContain('secret-command-argument')
+    expect(html).not.toContain('raw-command-output')
+    expect(html).toContain('执行记录')
+  })
+
+  it('uses a real compact stage without exposing an internal tool name', () => {
+    snapshot.state!.live = { runId: 'run_1', phase: 'acting', startedAt: Date.now(), agentNotes: {}, items: [
+      { kind: 'tool', name: 'run_shell', callId: 'call_1', args: '', output: '', state: 'running', startedAt: Date.now(), endedAt: 0 },
+    ] }
+    const html = render()
+    expect(html).toContain('正在处理')
+    expect(html).not.toContain('run_shell')
+  })
+
+  it('exposes anchored required confirmation outside work history', () => {
+    snapshot.state!.messages = [{ ...reply([{ type: 'text', text: '请整理资料' }]), role: 'user' }]
+    snapshot.state!.cards = [card({ kind: 'confirm', status: 'action_required', anchorMessageId: 'msg_1',
+      title: '新增一份项目草稿', actions: [{ id: 'confirm', label: '确认新增', style: 'primary' }] })]
+    const html = render()
+    expect(html).toContain('新增一份项目草稿')
+    expect(html).toContain('确认新增')
+  })
+
+  it('keeps a required confirmation accessible when its anchor is an assistant message', () => {
+    snapshot.state!.messages = [reply([{ type: 'text', text: '准备新增项目草稿' }])]
+    snapshot.state!.cards = [card({ kind: 'confirm', status: 'action_required', anchorMessageId: 'msg_1',
+      title: '新增一份项目草稿', actions: [{ id: 'confirm', label: '确认新增', style: 'primary' }] })]
+    expect(render()).toContain('确认新增')
+  })
+
+  it('does not reveal internal thinking when records are deliberately opened', () => {
+    const html = renderToStaticMarkup(createElement(ProcessTimeline, {
+      parts: [{ type: 'thinking', process: true, text: 'private-internal-deliberation' }],
+      live: true, idKey: 'thinking-test', renderPart: () => null,
+    }))
+    expect(html).not.toContain('private-internal-deliberation')
+  })
+
+  it('blocks repeated HITL choices when the shared action result is unknown', () => {
+    snapshot.state!.cardActionStates = { 'hitl:hitl_1': 'unknown' }
+    snapshot.state!.activeHitl = [{ id: 'hitl_1', runId: 'run_1', kind: 'choice', question: '选择整理范围',
+      conversationId: 'cnv_1', allowFreeInput: false, createdAt: timestamp, resolved: false,
+      choices: [{ id: 'all', label: '全部材料', description: '整理三份材料', impact: '生成一份草稿' }],
+    }]
+    const html = render()
+    expect(html).toMatch(/<button[^>]*disabled=""[^>]*>[\s\S]*?全部材料/)
+    expect(html).toContain('正在核实处理结果')
+  })
+
+  it('folds command details while retaining the confirmation and consequences', () => {
+    snapshot.state!.activeHitl = [hitl()]
+    const html = render()
+    expect(html).not.toContain('confirm-record')
+    expect(html).toContain('执行工具 run_shell？')
+    expect(html).toContain('按已确认的参数调用')
+    expect(html).toContain('会访问外部资源并返回结果')
+    expect(html).toContain('操作详情')
+  })
+
+  it('makes the original command detail readable after the user expands it', () => {
+    snapshot.state!.activeHitl = [hitl()]
+    setPersistedOpen('hitl-details:cnv_1:hitl_detail1', true)
+    const html = render()
+    expect(html).toMatch(/aria-expanded="true"[^>]*>[\s\S]*?操作详情/)
+    expect(html).toContain('confirm-record')
+  })
+
+  it('keeps a blocking restriction visible outside the operation detail fold', () => {
+    snapshot.state!.activeHitl = [hitl({ blocked: true, blockReason: '目标文件需要先完成评审，当前不能覆盖' })]
+    const html = render()
+    expect(html).toContain('目标文件需要先完成评审，当前不能覆盖')
+    expect(html).not.toContain('confirm-record')
+  })
+
+  it('folds the exact workflow script suffix supplied in the question', () => {
+    snapshot.state!.activeHitl = [hitl({ question: '运行这段脚本？\nprint("workflow-record-script")', detail: undefined })]
+    const html = render()
+    expect(html).toContain('运行这段脚本？')
+    expect(html).toContain('会访问外部资源并返回结果')
+    expect(html).not.toContain('workflow-record-script')
+    expect(html).toContain('操作详情')
+  })
+
+  it('retains the full workflow script and separate detail on deliberate expansion', () => {
+    snapshot.state!.activeHitl = [hitl({ question: '运行这段脚本？\nprint("workflow-record-script")' })]
+    setPersistedOpen('hitl-details:cnv_1:hitl_detail1', true)
+    const html = render()
+    expect(html).toContain('workflow-record-script')
+    expect(html).toContain('confirm-record')
+    expect(html).toMatch(/aria-expanded="true"[^>]*>[\s\S]*?操作详情/)
+  })
+
+  it('retains multiline business consequences in an ordinary question', () => {
+    snapshot.state!.activeHitl = [hitl({ question: '批准计划并继续执行？\n会覆盖旧草稿，原件保留', detail: undefined })]
+    expect(render()).toContain('会覆盖旧草稿，原件保留')
+  })
+})
diff --git a/test/live.test.ts b/test/live.test.ts
index 45d61a7..bedb453 100644
--- a/test/live.test.ts
+++ b/test/live.test.ts
@@ -175,10 +175,13 @@ describe('livePhaseLabel', () => {
 })
 
 describe('showProcessInline', () => {
-  it('stays expanded for the whole live run, including the responding phase', () => {
-    expect(showProcessInline(live({ phase: 'thinking' }), true)).toBe(true)
-    expect(showProcessInline(live({ phase: 'acting' }), true)).toBe(true)
-    expect(showProcessInline(live({ phase: 'responding' }), true)).toBe(true)
+  it('keeps live technical records folded under the default reading preference', () => {
+    expect(showProcessInline(live({ phase: 'thinking' }), true)).toBe(false)
+    expect(showProcessInline(live({ phase: 'acting' }), true)).toBe(false)
+    expect(showProcessInline(live({ phase: 'responding' }), true)).toBe(false)
+  })
+  it('honors the advanced preference to expose live records', () => {
+    expect(showProcessInline(live({ phase: 'acting' }), false)).toBe(true)
   })
   it('records thinking duration from the first delta to the last', () => {
     let items: LiveItem[] = applyThinkingDelta([], '先', 1000)
diff --git a/test/messageparts.test.ts b/test/messageparts.test.ts
index 7fa652c..e37103f 100644
--- a/test/messageparts.test.ts
+++ b/test/messageparts.test.ts
@@ -1,5 +1,6 @@
 import { describe, it, expect } from 'vitest'
 import { splitTimeline, humanSize, artifactIcon, artifactIdsIn, markMissingArtifacts, workedLabel, dedupeDeliverables, foldRunErrors, processSummary, humanError } from '../src/messageparts'
+import { applyTextDelta, applyThinkingDelta, applyToolCall, applyToolOutput, liveToMessage, showProcessInline } from '../src/live'
 import type { Part } from '../src/contracts'
 
 function p(partial: Partial<Part> & { type: Part['type'] }): Part {
@@ -7,7 +8,68 @@ function p(partial: Partial<Part> & { type: Part['type'] }): Part {
 }
 
 describe('splitTimeline', () => {
-  it('keeps everything up to the last process part in the timeline', () => {
+  it('keeps public Markdown before, between and after tools in reading order', () => {
+    const parts: Part[] = [
+      p({ type: 'text', text: '我会先核对**两份可读材料**。', process: true }),
+      p({ type: 'tool_call', process: true, toolCall: { id: 'c1', name: 'read' } }),
+      p({ type: 'tool_result', process: true, toolResult: { callId: 'c1', status: 'ok', summary: '原始读取结果' } }),
+      p({ type: 'text', text: '评审意见未能读取，完整结论尚未生成。' }),
+      p({ type: 'tool_call', process: true, toolCall: { id: 'c2', name: 'search' } }),
+      p({ type: 'text', text: '接下来确认日期冲突。' }),
+    ]
+    const split = splitTimeline(parts)
+    expect(split.final.map(part => part.text)).toEqual([
+      '我会先核对**两份可读材料**。',
+      '评审意见未能读取，完整结论尚未生成。',
+      '接下来确认日期冲突。',
+    ])
+    expect(split.timeline.map(part => part.type)).toEqual(['tool_call', 'tool_result', 'tool_call'])
+  })
+
+  it('keeps live scope limits visible while execution records are folded by default', () => {
+    let items = applyThinkingDelta([], '内部分析，不向用户展示', 0)
+    items = applyTextDelta(items, 0, '**范围限制：**目前仅整理两份材料，评审意见尚未读取。')
+    items = applyToolCall(items, 'run_python', 'c1', '{"script":"print(42)"}')
+    items = applyToolOutput(items, 'c1', '42\n')
+    const live = { runId: 'r1', phase: 'tool', items, agentNotes: {}, startedAt: 0 }
+    const message = liveToMessage(live)
+    expect(message.parts[1].process).toBe(true)
+    expect(showProcessInline(live, true)).toBe(false)
+    const split = splitTimeline(message.parts)
+    expect(split.final.map(part => part.text)).toEqual(['**范围限制：**目前仅整理两份材料，评审意见尚未读取。'])
+    expect(split.final.every(part => part.type === 'text')).toBe(true)
+    expect(split.timeline.map(part => part.type)).toEqual(['thinking', 'tool_call'])
+  })
+
+  it('keeps finalizing checks and internal thinking out of visible text without duplicating explanations', () => {
+    const parts: Part[] = [
+      p({ type: 'text', process: true, text: '评审意见尚未读取。' }),
+      p({ type: 'thinking', process: true, text: '内部推理' }),
+      p({ type: 'tool_call', process: true, toolCall: { id: 'c1', name: 'read' } }),
+      p({ type: 'tool_result', process: true, toolResult: { callId: 'c1', status: 'ok', summary: '诊断输出' } }),
+      p({ type: 'check', process: true, check: { passed: false, reason: '纸张不是 A4' } }),
+      p({ type: 'text', text: '已整理两份材料，请补充清晰的评审意见。' }),
+    ]
+    for (const finished of [false, true]) {
+      const split = splitTimeline(parts, finished)
+      expect(split.final.map(part => part.text)).toEqual(['评审意见尚未读取。', '已整理两份材料，请补充清晰的评审意见。'])
+      expect(split.timeline.map(part => part.type)).toEqual(['thinking', 'tool_call', 'tool_result', 'check'])
+      expect(split.final.length + split.timeline.length).toBe(parts.length)
+    }
+  })
+
+  it('keeps errors and file references outside a technical record even before a later tool', () => {
+    const parts: Part[] = [
+      p({ type: 'error', process: true, error: { code: 'read.failed', message: '评审意见无法读取' } }),
+      p({ type: 'artifact_ref', artifact: { artifactId: 'a1', name: '已整理的材料.docx' } }),
+      p({ type: 'tool_call', process: true, toolCall: { id: 'c1', name: 'search' } }),
+      p({ type: 'text', text: '已整理另外两份材料' }),
+    ]
+    const split = splitTimeline(parts)
+    expect(split.timeline.map(x => x.type)).toEqual(['tool_call'])
+    expect(split.final.map(x => x.type)).toEqual(['error', 'artifact_ref', 'text'])
+  })
+  it('keeps only execution records folded when narration precedes the last process part', () => {
     const parts: Part[] = [
       p({ type: 'text', text: '先找资料', process: true }),
       p({ type: 'tool_call', process: true, toolCall: { id: 'c1', name: 'search' } }),
@@ -16,8 +78,8 @@ describe('splitTimeline', () => {
       p({ type: 'artifact_ref', artifact: { artifactId: 'a1', name: '会议纪要.docx' } }),
     ]
     const split = splitTimeline(parts)
-    expect(split.timeline.map(x => x.type)).toEqual(['text', 'tool_call', 'tool_result'])
-    expect(split.final.map(x => x.type)).toEqual(['text', 'artifact_ref'])
+    expect(split.timeline.map(x => x.type)).toEqual(['tool_call', 'tool_result'])
+    expect(split.final.map(x => x.type)).toEqual(['text', 'text', 'artifact_ref'])
   })
 
   it('keeps a card sandwiched between process parts inside the timeline', () => {
@@ -32,7 +94,7 @@ describe('splitTimeline', () => {
     expect(split.final.map(x => x.text)).toEqual(['最终'])
   })
 
-  it('lifts the last narration when a finished run has no final text', () => {
+  it('keeps all narrations visible even when a finished run has no final text', () => {
     const parts: Part[] = [
       p({ type: 'text', text: '先写一版', process: true }),
       p({ type: 'tool_call', process: true, toolCall: { id: 'c1', name: 'run_python' } }),
@@ -40,10 +102,9 @@ describe('splitTimeline', () => {
       p({ type: 'tool_call', process: true, toolCall: { id: 'c2', name: 'run_python' } }),
     ]
     const split = splitTimeline(parts, true)
-    expect(split.final.map(x => x.text)).toEqual(['纪要已经整理好'])
-    expect(split.final[0].process).toBeUndefined()
-    expect(split.timeline.map(x => x.type)).toEqual(['text', 'tool_call', 'tool_call'])
-    expect(splitTimeline(parts).final).toEqual([])
+    expect(split.final.map(x => x.text)).toEqual(['先写一版', '纪要已经整理好'])
+    expect(split.timeline.map(x => x.type)).toEqual(['tool_call', 'tool_call'])
+    expect(splitTimeline(parts).final).toEqual(split.final)
   })
 
   it('puts a message with no process parts entirely in the final section', () => {
diff --git a/test/work-state.test.ts b/test/work-state.test.ts
new file mode 100644
index 0000000..d831590
--- /dev/null
+++ b/test/work-state.test.ts
@@ -0,0 +1,421 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import { api } from '../src/api'
+import { store } from '../src/store'
+import type { ActivityCard, Conversation, Message, Run, StreamEvent, SurfaceSnapshot } from '../src/contracts'
+
+function deferred<T>() {
+  let resolve!: (value: T) => void
+  let reject!: (reason: unknown) => void
+  const promise = new Promise<T>((ok, fail) => { resolve = ok; reject = fail })
+  return { promise, resolve, reject }
+}
+function card(id = 'task', status: ActivityCard['status'] = 'active', conversationId = 'a'): ActivityCard {
+  return { id, status, conversationId, projectId: 'p', kind: 'progress', title: '整理材料', createdAt: '2026-10-12T00:00:00Z', updatedAt: '2026-10-12T00:00:00Z' }
+}
+function detail(id: string, runs: Run[] = [], lastSeq = 0, resumeSeq = lastSeq) {
+  return { conversation: { id, projectId: 'p', title: id, createdAt: '', updatedAt: '' } as Conversation, messages: [] as Message[], runs, activeHitl: [], lastSeq, resumeSeq }
+}
+function event(seq: number, type: StreamEvent['type'], payload: unknown, runId?: string, conversationId = 'a'): StreamEvent {
+  return { seq, type, payload, runId, conversationId, ts: '2026-10-12T00:00:00Z', v: 1 }
+}
+class FakeEventSource {
+  onopen = null
+  onerror = null
+  onmessage = null
+  addEventListener() {}
+  close() {}
+}
+
+beforeEach(async () => {
+  vi.stubGlobal('EventSource', FakeEventSource)
+  vi.spyOn(api, 'conversationDetail').mockImplementation(async id => detail(id))
+  vi.spyOn(api, 'getPlan').mockResolvedValue(null)
+  vi.spyOn(api, 'getTodos').mockResolvedValue(null)
+  vi.spyOn(api, 'listCards').mockResolvedValue([])
+  vi.spyOn(api, 'listTasks').mockResolvedValue([])
+  vi.spyOn(api, 'listArtifacts').mockResolvedValue([])
+  vi.spyOn(api, 'surfaceList').mockResolvedValue([])
+  vi.spyOn(api, 'projectSurfaces').mockResolvedValue([])
+  vi.spyOn(api, 'listProjectCards').mockResolvedValue([])
+  await store.openProject('p')
+  await store.openConversation('a')
+  await store.refreshCards('a')
+})
+afterEach(() => { vi.useRealTimers(); vi.restoreAllMocks(); vi.unstubAllGlobals() })
+
+describe('work projection ordering and context', () => {
+  it('settles foreground completion and queued input when background events overtake its detail response', async () => {
+    vi.useFakeTimers()
+    const run: Run = { id: 'front', conversationId: 'a', projectId: 'p', kind: 'conversation', status: 'running', createdAt: '' }
+    vi.mocked(api.conversationDetail).mockResolvedValue(detail('a', [run]))
+    await store.openConversation('a')
+    store.applyEvent(event(1, 'message.delta', { index: 0, text: '正在整理' }, 'front'))
+    store.upsertCard(card('background'))
+    store.enqueueOutbox('继续整理', ['material'], ['材料'])
+    const query = deferred<ReturnType<typeof detail>>()
+    vi.mocked(api.conversationDetail).mockReturnValueOnce(query.promise)
+    const send = deferred<Awaited<ReturnType<typeof api.sendMessage>>>()
+    const submission = vi.spyOn(api, 'sendMessage').mockReturnValue(send.promise)
+    store.applyEvent(event(2, 'run.completed', {}, 'front'))
+    await vi.advanceTimersByTimeAsync(250)
+    store.applyEvent(event(3, 'agent.progress', { agentRun: 'background', note: '仍在核对' }, 'background'))
+    store.applyEvent(event(4, 'card.status', { cardId: 'background', status: 'done' }, 'background'))
+    vi.mocked(api.listCards).mockResolvedValue([card('background', 'done')])
+    query.resolve({ ...detail('a', [{ ...run, status: 'completed' }], 2), messages: [
+      { id: 'reply', conversationId: 'a', runId: 'front', role: 'assistant', parts: [{ type: 'text', text: '整理完成' }], createdAt: '' },
+    ] })
+    await vi.advanceTimersByTimeAsync(0)
+    expect(store.getState().runs.find(r => r.id === 'front')?.status).toBe('completed')
+    expect(store.getState().messages.map(m => m.id)).toContain('reply')
+    expect(store.getState().live).toBeNull()
+    expect(store.getState().lastSeq).toBe(4)
+    expect(store.getState().cards.find(c => c.id === 'background')?.status).toBe('done')
+    expect(store.getState().outbox).toEqual([])
+    expect(submission).toHaveBeenCalledWith('a', '继续整理', ['material'], expect.any(String))
+    send.resolve({ message: { id: 'queued', conversationId: 'a', role: 'user', parts: [], createdAt: '' } })
+    await vi.advanceTimersByTimeAsync(0)
+  })
+
+  it('waits for the newer terminal run snapshot before settling its live output', async () => {
+    vi.useFakeTimers()
+    const run: Run = { id: 'front', conversationId: 'a', projectId: 'p', kind: 'conversation', status: 'running', createdAt: '' }
+    vi.mocked(api.conversationDetail).mockResolvedValue(detail('a', [run]))
+    await store.openConversation('a')
+    store.applyEvent(event(1, 'message.delta', { index: 0, text: '正在整理' }, 'front'))
+    const query = deferred<ReturnType<typeof detail>>()
+    vi.mocked(api.conversationDetail).mockReturnValueOnce(query.promise)
+    const pending = store.reconcile()
+    store.applyEvent(event(2, 'run.failed', { code: 'failed', message: '未完成' }, 'front'))
+    query.resolve(detail('a', [{ ...run, status: 'completed' }], 1))
+    await pending
+    expect(store.getState().runs[0].status).toBe('running')
+    expect(store.getState().live?.items).toContainEqual({ kind: 'text', index: 0, text: '正在整理' })
+    vi.mocked(api.conversationDetail).mockResolvedValue(detail('a', [{ ...run, status: 'failed' }], 2))
+    await vi.advanceTimersByTimeAsync(250)
+    expect(store.getState().runs[0].status).toBe('failed')
+    expect(store.getState().live).toBeNull()
+  })
+
+  it('does not restore a resolved HITL from a detail snapshot overtaken by its resolution', async () => {
+    const run: Run = { id: 'front', conversationId: 'a', projectId: 'p', kind: 'conversation', status: 'running', createdAt: '' }
+    vi.mocked(api.conversationDetail).mockResolvedValue(detail('a', [run]))
+    await store.openConversation('a')
+    const query = deferred<Awaited<ReturnType<typeof api.conversationDetail>>>()
+    vi.mocked(api.conversationDetail).mockReturnValueOnce(query.promise)
+    const pending = store.reconcile()
+    store.applyEvent(event(2, 'hitl.resolved', { cardId: 'ask' }, 'front'))
+    query.resolve({ ...detail('a', [{ ...run, status: 'completed' }], 1), activeHitl: [
+      { id: 'ask', runId: 'front', conversationId: 'a', question: '继续？', kind: 'confirm', allowFreeInput: false, createdAt: '', resolved: false },
+    ] })
+    await pending
+    expect(store.getState().activeHitl).toEqual([])
+    expect(store.getState().runs[0].status).toBe('completed')
+    expect(store.getState().lastSeq).toBe(2)
+  })
+
+  it('preserves a run and user message started after a detail query began', async () => {
+    const query = deferred<ReturnType<typeof detail>>()
+    vi.mocked(api.conversationDetail).mockReturnValueOnce(query.promise)
+    const pending = store.reconcile()
+    vi.spyOn(api, 'sendMessage').mockResolvedValue({
+      message: { id: 'new-message', conversationId: 'a', role: 'user', parts: [], createdAt: '' },
+      run: { id: 'new-run', conversationId: 'a', projectId: 'p', kind: 'conversation', status: 'running', createdAt: '' },
+    })
+    await store.sendMessage('继续', [])
+    query.resolve(detail('a'))
+    await pending
+    expect(store.getState().runs.map(r => r.id)).toEqual(['new-run'])
+    expect(store.getState().messages.map(m => m.id)).toEqual(['new-message'])
+    expect(store.getState().live?.runId).toBe('new-run')
+  })
+
+  it('drops a terminal reconciliation timer after leaving its conversation', async () => {
+    vi.useFakeTimers()
+    store.applyEvent(event(1, 'run.completed', {}, 'front'))
+    await store.openConversation('b')
+    const calls = vi.mocked(api.conversationDetail).mock.calls.length
+    await vi.advanceTimersByTimeAsync(250)
+    expect(api.conversationDetail).toHaveBeenCalledTimes(calls)
+    expect(store.getState().currentConvId).toBe('b')
+  })
+
+  it('does not regress a finished card on an older or duplicated event', () => {
+    store.applyEvent(event(10, 'card.created', { card: card() }))
+    store.applyEvent(event(12, 'card.status', { cardId: 'task', status: 'done' }))
+    store.applyEvent(event(11, 'card.status', { cardId: 'task', status: 'active' }))
+    store.applyEvent(event(12, 'card.status', { cardId: 'task', status: 'failed' }))
+    expect(store.getState().cards[0].status).toBe('done')
+  })
+
+  it('rejects late card events from a different conversation', async () => {
+    await store.openConversation('b')
+    store.applyEvent(event(10, 'card.created', { card: card('foreign') }))
+    expect(store.getState().cards).toEqual([])
+  })
+
+  it('does not let a card query finish in another conversation', async () => {
+    const query = deferred<ActivityCard[]>()
+    vi.mocked(api.listCards).mockImplementation(id => id === 'a' ? query.promise : Promise.resolve([]))
+    const pending = store.refreshCards('a')
+    await store.openConversation('b')
+    query.resolve([card('old')])
+    await pending
+    expect(store.getState().cards).toEqual([])
+  })
+
+  it('keeps card events newer than an in-flight card snapshot', async () => {
+    store.applyEvent(event(10, 'card.created', { card: card() }))
+    const query = deferred<ActivityCard[]>()
+    vi.mocked(api.listCards).mockReturnValueOnce(query.promise)
+    const pending = store.refreshCards('a')
+    store.applyEvent(event(11, 'card.status', { cardId: 'task', status: 'done' }))
+    store.applyEvent(event(12, 'card.created', { card: card('new-task') }))
+    query.resolve([card()])
+    await pending
+    expect(store.getState().cards.find(c => c.id === 'task')?.status).toBe('done')
+    expect(store.getState().cards.some(c => c.id === 'new-task')).toBe(true)
+  })
+
+  it('preserves a status event that arrives before its first card snapshot', async () => {
+    const query = deferred<ActivityCard[]>()
+    vi.mocked(api.listCards).mockReturnValueOnce(query.promise)
+    const pending = store.refreshCards('a')
+    store.applyEvent(event(1, 'card.status', { cardId: 'task', status: 'done' }))
+    query.resolve([card()])
+    await pending
+    expect(store.getState().cards[0].status).toBe('done')
+  })
+
+  it('does not let a delayed conversation snapshot replace the newly selected one', async () => {
+    const query = deferred<ReturnType<typeof detail>>()
+    vi.mocked(api.conversationDetail).mockReturnValueOnce(query.promise)
+    const pending = store.reconcile()
+    await store.openConversation('b')
+    query.resolve({ ...detail('a'), messages: [{ id: 'old-message', conversationId: 'a', role: 'user', parts: [], createdAt: '' }] })
+    await pending
+    expect(store.getState().currentConvId).toBe('b')
+    expect(store.getState().messages).toEqual([])
+  })
+
+  it('restores foreground output through replay without replaying old card states', async () => {
+    const run: Run = { id: 'front', conversationId: 'a', projectId: 'p', kind: 'conversation', status: 'running', createdAt: '' }
+    vi.mocked(api.conversationDetail).mockResolvedValue(detail('a', [run], 10, 4))
+    vi.mocked(api.listCards).mockResolvedValue([card('task', 'done')])
+    await store.openConversation('a')
+    await store.refreshCards('a')
+    store.applyEvent(event(5, 'message.delta', { index: 0, text: '已经整理' }, 'front'))
+    store.applyEvent(event(6, 'card.status', { cardId: 'task', status: 'active' }))
+    expect(store.getState().live?.items).toContainEqual({ kind: 'text', index: 0, text: '已经整理' })
+    expect(store.getState().cards[0].status).toBe('done')
+  })
+
+  it('does not duplicate replayed foreground text', async () => {
+    const run: Run = { id: 'front', conversationId: 'a', projectId: 'p', kind: 'conversation', status: 'running', createdAt: '' }
+    vi.mocked(api.conversationDetail).mockResolvedValue(detail('a', [run], 0))
+    await store.openConversation('a')
+    store.applyEvent(event(1, 'message.delta', { index: 0, text: '结论' }, 'front'))
+    store.applyEvent(event(1, 'message.delta', { index: 0, text: '结论' }, 'front'))
+    expect(store.getState().live?.items).toContainEqual({ kind: 'text', index: 0, text: '结论' })
+  })
+
+  it('background notes do not create a foreground turn or block the composer', () => {
+    store.applyEvent(event(1, 'agent.progress', { agentRun: 'background', note: '正在读取' }, 'background'))
+    expect(store.getState().live).toBeNull()
+  })
+
+  it('new task pages do not replace an open document or reopen a hidden right pane', () => {
+    store.requestPreview({ id: 'doc', projectId: 'p', name: '需求.md', kind: 'markdown', size: 0, createdAt: '', updatedAt: '' })
+    store.setUI({ rightCollapsed: true })
+    const snap: SurfaceSnapshot = { identity: { surfaceId: 'page', pluginId: 'generative-ui', owner: 'o' }, revision: 1, activationEpoch: 0, compat: { schemaVersion: 1, catalogVersion: '1' }, spec: { title: '新成果', nodes: [] } }
+    store.applyEvent(event(1, 'surface.updated', snap, 'background'))
+    expect(store.getState().previewActive.a).toBe('doc')
+    expect(store.getState().ui.rightCollapsed).toBe(true)
+    expect(store.getState().surfaces[0].identity.surfaceId).toBe('page')
+  })
+
+  it('resets project event cursor when changing projects and drops delayed project lists', async () => {
+    await store.openProject('p')
+    store.applyProjectEvent(event(100, 'card.created', { card: { ...card('p-card'), conversationId: undefined } }))
+    const query = deferred<ActivityCard[]>()
+    vi.mocked(api.listProjectCards).mockReturnValueOnce(query.promise)
+    const pending = store.loadProjectCards()
+    await store.openProject('q')
+    store.applyProjectEvent(event(1, 'card.created', { card: { ...card('q-card'), projectId: 'q', conversationId: undefined } }))
+    query.resolve([{ ...card('old-p'), conversationId: undefined }])
+    await pending
+    expect(store.getState().projectCards.map(c => c.id)).toEqual(['q-card'])
+  })
+})
+
+describe('shared action feedback', () => {
+  it.each(['card', 'hitl'] as const)('clears its definite rejected %s action after A to B navigation', async kind => {
+    const confirm = { ...card(`reject-${kind}`, 'action_required'), kind: 'confirm' as const,
+      ...(kind === 'hitl' ? { body: [{ type: 'kv' as const, kv: [['来源', `hitl:reject-${kind}`]] as [string, string][] }] } : {}) }
+    store.upsertCard(confirm)
+    const response = deferred<never>()
+    const request = kind === 'hitl' ? vi.spyOn(api, 'resolveHITL').mockReturnValue(response.promise) : vi.spyOn(api, 'cardAction').mockReturnValue(response.promise)
+    const pending = store.cardAction(confirm, 'confirm')
+    await store.openConversation('b')
+    response.reject(new Error('400: rejected'))
+    await pending
+    expect(store.getState().cardActionStates[confirm.id]).toBeUndefined()
+    expect(store.getState().cardActionStates[`hitl:${confirm.id}`]).toBeUndefined()
+    expect(store.getState().cards).toEqual([])
+    expect(store.getState().messages).toEqual([])
+    vi.mocked(api.listCards).mockResolvedValue([confirm])
+    await store.openConversation('a')
+    await store.refreshCards('a')
+    await store.cardAction(confirm, 'confirm')
+    expect(request).toHaveBeenCalledTimes(2)
+  })
+
+  it.each([
+    ['card', new TypeError('connection lost')], ['card', new Error('503: unavailable')],
+    ['hitl', new TypeError('connection lost')], ['hitl', new Error('503: unavailable')],
+  ] as const)('retains unknown feedback for an off-context %s request with %s', async (kind, failure) => {
+    const id = `unknown-${kind}-${failure instanceof TypeError ? 'network' : 'server'}`
+    const confirm = { ...card(id, 'action_required'), kind: 'confirm' as const,
+      ...(kind === 'hitl' ? { body: [{ type: 'kv' as const, kv: [['来源', `hitl:${id}`]] as [string, string][] }] } : {}) }
+    store.upsertCard(confirm)
+    const response = deferred<never>()
+    const request = kind === 'hitl' ? vi.spyOn(api, 'resolveHITL').mockReturnValue(response.promise) : vi.spyOn(api, 'cardAction').mockReturnValue(response.promise)
+    const pending = store.cardAction(confirm, 'confirm')
+    await store.openConversation('b')
+    response.reject(failure)
+    await pending
+    expect(store.getState().cardActionStates[confirm.id]).toBe('unknown')
+    if (kind === 'hitl') expect(store.getState().cardActionStates[`hitl:${confirm.id}`]).toBe('unknown')
+    vi.mocked(api.listCards).mockResolvedValue([confirm])
+    await store.openConversation('a')
+    await store.refreshCards('a')
+    await store.cardAction(confirm, 'confirm')
+    expect(request).toHaveBeenCalledTimes(1)
+    store.applyEvent(event(1, 'card.resolved', { cardId: confirm.id }))
+    expect(store.getState().cardActionStates[confirm.id]).toBeUndefined()
+    expect(store.getState().cardActionStates[`hitl:${confirm.id}`]).toBeUndefined()
+  })
+
+  it('does not let an old rejected action clear feedback owned by a newer HITL projection', async () => {
+    const confirm = { ...card('replacement', 'action_required'), kind: 'confirm' as const }
+    store.upsertCard(confirm)
+    const old = deferred<never>()
+    vi.spyOn(api, 'cardAction').mockReturnValue(old.promise)
+    const first = store.cardAction(confirm, 'confirm')
+    store.applyEvent(event(1, 'card.resolved', { cardId: confirm.id }))
+    const projected = { ...confirm, body: [{ type: 'kv' as const, kv: [['来源', 'hitl:replacement']] as [string, string][] }] }
+    store.applyEvent(event(2, 'card.updated', { card: projected }))
+    const replacement = deferred<Awaited<ReturnType<typeof api.resolveHITL>>>()
+    vi.spyOn(api, 'resolveHITL').mockReturnValue(replacement.promise)
+    const second = store.cardAction(projected, 'confirm')
+    old.reject(new Error('400: rejected'))
+    await first
+    expect(store.getState().cardActionStates.replacement).toBe('submitting')
+    expect(store.getState().cardActionStates['hitl:replacement']).toBe('submitting')
+    vi.mocked(api.listCards).mockResolvedValue([{ ...projected, status: 'resolved' }])
+    replacement.resolve({ resolved: true, pivoted: false, pivotText: '' })
+    await second
+    expect(store.getState().cardActionStates.replacement).toBeUndefined()
+  })
+
+  it('does not append another conversation receipt to the currently open conversation', async () => {
+    const foreign = { ...card('other-confirm', 'action_required', 'b'), kind: 'confirm' as const }
+    store.applyProjectEvent(event(1, 'card.created', { card: foreign }))
+    vi.spyOn(api, 'cardAction').mockResolvedValue({ card: { ...foreign, status: 'resolved' }, receipt: {
+      id: 'foreign-receipt', conversationId: 'b', role: 'system', createdAt: '', parts: [{ type: 'text', text: 'other conversation outcome' }],
+    } })
+    await store.cardAction(foreign, 'confirm')
+    expect(store.getState().messages).toEqual([])
+    expect(store.getState().projectCards[0].status).toBe('resolved')
+  })
+  it('unlocks a completed read-only recheck even while confirmation remains pending', async () => {
+    const confirm = { ...card('recheck', 'action_required'), kind: 'confirm' as const }
+    store.upsertCard(confirm)
+    vi.spyOn(api, 'cardAction').mockResolvedValue({ card: confirm })
+    await store.cardAction(confirm, 'recheck')
+    expect(store.getState().cardActionStates.recheck).toBeUndefined()
+  })
+
+  it('does not overwrite a newer resolved event with the older action response', async () => {
+    const confirm = { ...card('confirm', 'action_required'), kind: 'confirm' as const }
+    store.upsertCard(confirm)
+    const response = deferred<{ card: ActivityCard }>()
+    vi.spyOn(api, 'cardAction').mockReturnValue(response.promise)
+    vi.mocked(api.listCards).mockResolvedValue([confirm])
+    const pending = store.cardAction(confirm, 'confirm')
+    store.applyEvent(event(1, 'card.resolved', { cardId: 'confirm' }))
+    response.resolve({ card: confirm })
+    await pending
+    expect(store.getState().cards[0].status).toBe('resolved')
+  })
+
+  it('shares one lock across a raw HITL and its activity-card projection', async () => {
+    const confirm = { ...card('confirm', 'action_required'), kind: 'confirm' as const, body: [{ type: 'kv', kv: [['来源', 'hitl:ask']] }] } satisfies ActivityCard
+    store.upsertCard(confirm)
+    const response = deferred<{ resolved: boolean; pivoted: boolean; pivotText: string }>()
+    const request = vi.spyOn(api, 'resolveHITL').mockReturnValue(response.promise)
+    const first = store.resolveHITL('ask', { choiceId: 'yes' })
+    const second = store.cardAction(confirm, 'yes')
+    expect(store.getState().cardActionStates.confirm).toBe('submitting')
+    expect(request).toHaveBeenCalledTimes(1)
+    vi.mocked(api.listCards).mockResolvedValue([{ ...confirm, status: 'resolved' }])
+    response.resolve({ resolved: true, pivoted: false, pivotText: '' })
+    await Promise.all([first, second])
+    expect(store.getState().cardActionStates.confirm).toBeUndefined()
+  })
+
+  it('uses the server cancellation outcome rather than labelling every resolved HITL executed', async () => {
+    const confirm = { ...card('confirm', 'action_required'), kind: 'confirm' as const, body: [{ type: 'kv', kv: [['来源', 'hitl:ask']] }] } satisfies ActivityCard
+    store.upsertCard(confirm)
+    vi.spyOn(api, 'resolveHITL').mockResolvedValue({ resolved: true, pivoted: false, pivotText: '' })
+    vi.mocked(api.listCards).mockResolvedValue([{ ...confirm, status: 'dismissed' }])
+    await store.resolveHITL('ask', { choiceId: 'no' })
+    expect(store.getState().cards[0].status).toBe('dismissed')
+  })
+
+  it('leaves a new conversation untouched when an older send returns', async () => {
+    const response = deferred<Awaited<ReturnType<typeof api.sendMessage>>>()
+    vi.spyOn(api, 'sendMessage').mockReturnValue(response.promise)
+    const pending = store.sendMessage('整理材料', [])
+    await store.openConversation('b')
+    response.resolve({ message: { id: 'old-message', conversationId: 'a', role: 'user', createdAt: '', parts: [{ type: 'text', text: '整理材料' }] }, run: { id: 'old-run', conversationId: 'a', projectId: 'p', kind: 'conversation', status: 'running', createdAt: '' } })
+    await pending
+    expect(store.getState().messages).toEqual([])
+    expect(store.getState().live).toBeNull()
+  })
+  it('locks a card before awaiting so two views submit one effect', async () => {
+    const confirm = { ...card('confirm', 'action_required'), kind: 'confirm' as const, actions: [{ id: 'confirm', label: '生成草稿' }] }
+    const response = deferred<{ card: ActivityCard }>()
+    const calls = vi.spyOn(api, 'cardAction').mockReturnValue(response.promise)
+    store.upsertCard(confirm)
+    const first = store.cardAction(confirm, 'confirm')
+    const second = store.cardAction(confirm, 'confirm')
+    expect(store.getState().cardActionStates?.confirm).toBe('submitting')
+    expect(calls).toHaveBeenCalledTimes(1)
+    response.resolve({ card: { ...confirm, status: 'resolved' } })
+    await Promise.all([first, second])
+    expect(store.getState().cards[0].status).toBe('resolved')
+    expect(store.getState().cardActionStates?.confirm).toBeUndefined()
+  })
+
+  it('keeps an uncertain effect disabled until a server outcome is observed', async () => {
+    const confirm = { ...card('confirm', 'action_required'), kind: 'confirm' as const }
+    store.upsertCard(confirm)
+    vi.spyOn(api, 'cardAction').mockRejectedValue(new TypeError('connection lost'))
+    vi.mocked(api.listCards).mockResolvedValue([confirm])
+    await store.cardAction(confirm, 'confirm')
+    expect(store.getState().cardActionStates?.confirm).toBe('unknown')
+    store.applyEvent(event(1, 'card.resolved', { cardId: 'confirm' }))
+    expect(store.getState().cardActionStates?.confirm).toBeUndefined()
+  })
+
+  it('does not write a completed old action into a different conversation', async () => {
+    const confirm = { ...card('confirm', 'action_required'), kind: 'confirm' as const }
+    const response = deferred<{ card: ActivityCard }>()
+    vi.spyOn(api, 'cardAction').mockReturnValue(response.promise)
+    const pending = store.cardAction(confirm, 'confirm')
+    await store.openConversation('b')
+    response.resolve({ card: { ...confirm, status: 'resolved' } })
+    await pending
+    expect(store.getState().cards).toEqual([])
+  })
+})
diff --git a/test/workbench-layout.test.ts b/test/workbench-layout.test.ts
new file mode 100644
index 0000000..5290fc6
--- /dev/null
+++ b/test/workbench-layout.test.ts
@@ -0,0 +1,135 @@
+import { Children, createElement, isValidElement, type ReactNode } from 'react'
+import { renderToStaticMarkup } from 'react-dom/server'
+import { describe, expect, it, vi } from 'vitest'
+import { TopBar } from '../src/components/TopBar'
+import { TaskSidebar } from '../src/components/TaskSidebar'
+import { selectWorkbenchLayout, type WorkbenchLayoutOptions } from '../src/workbenchLayout'
+import { store } from '../src/store'
+
+vi.mock('../src/store', () => {
+  const state = {
+    projects: [{ id: 'prj_1', name: '材料项目' }],
+    tasks: [{ id: 'cnv_1', projectId: 'prj_1', title: '整理项目材料', updatedAt: '2026-10-12T10:00:00Z' }],
+    me: null, adminSections: [], artifacts: [], cards: [], projectCards: [], serverWorkspaces: [],
+    rdmAuditAvailable: false, currentConvId: 'cnv_1', currentProjectId: 'prj_1',
+    ui: { theme: 'light', showArchived: false, rightCollapsed: true, rightTab: 'work' },
+  }
+  return { useStore: (select: (value: typeof state) => unknown) => select(state), store: {
+    openInbox: vi.fn(), openFiles: vi.fn(), focusPending: vi.fn(), setUI: vi.fn(),
+  } }
+})
+
+const desktop: WorkbenchLayoutOptions = {
+  width: 1440, contextOpen: false, leftCollapsed: false, rightCollapsed: false,
+  leftWidth: 260, rightWidth: 360, previewWidth: 700, rightTab: 'work',
+  previewOpen: false, previewExpanded: false, filesView: 'list',
+}
+
+describe('selectWorkbenchLayout', () => {
+  it.each([320, 390, 736])('shows one conversation pane at %ipx and keeps saved desktop widths unchanged', width => {
+    const options = { ...desktop, width, leftWidth: 420, rightWidth: 560, rightCollapsed: true }
+    const layout = selectWorkbenchLayout(options)
+    expect(layout.compact).toBe(true)
+    expect([layout.showContext, layout.showConversation, layout.showRight]).toEqual([false, true, false])
+    expect(options.leftWidth).toBe(420)
+    expect(options.rightWidth).toBe(560)
+  })
+
+  it('opens context on a narrow screen and returns to the existing conversation', () => {
+    const options = { ...desktop, width: 390, rightCollapsed: true }
+    expect(selectWorkbenchLayout({ ...options, contextOpen: true }).pane).toBe('context')
+    expect(selectWorkbenchLayout({ ...options, contextOpen: false }).pane).toBe('conversation')
+  })
+
+  it('uses the same right pane for work and expanded file reading', () => {
+    const work = selectWorkbenchLayout({ ...desktop, width: 390 })
+    expect(work.pane).toBe('work')
+    expect([work.showContext, work.showConversation, work.showRight]).toEqual([false, false, true])
+    const files = selectWorkbenchLayout({ ...desktop, width: 390, rightTab: 'files', filesView: 'preview', previewOpen: true, previewExpanded: true })
+    expect(files.pane).toBe('files')
+    expect([files.showContext, files.showConversation, files.showRight]).toEqual([false, false, true])
+    expect(files.previewExpanded).toBe(true)
+    expect(files.rightWidth).toBe(382)
+  })
+
+  it('keeps the conversation visible after an expanded file pane is closed', () => {
+    const layout = selectWorkbenchLayout({ ...desktop, rightTab: 'files', filesView: 'preview', previewOpen: true, previewExpanded: true, rightCollapsed: true })
+    expect(layout.showConversation).toBe(true)
+    expect(layout.showRight).toBe(false)
+    expect(layout.previewExpanded).toBe(false)
+  })
+
+  it.each([1024, 1440])('fits stored oversized work panes inside %ipx while reserving conversation space', width => {
+    const layout = selectWorkbenchLayout({ ...desktop, width, leftWidth: 4000, rightWidth: 4000 })
+    expect(layout.compact).toBe(false)
+    expect(layout.leftWidth).toBeGreaterThanOrEqual(220)
+    expect(layout.leftWidth).toBeLessThanOrEqual(420)
+    expect(layout.rightWidth).toBeGreaterThanOrEqual(280)
+    expect(layout.rightWidth).toBeLessThanOrEqual(560)
+    expect(layout.leftWidth + layout.rightWidth + 360 + 32).toBeLessThanOrEqual(width)
+  })
+
+  it('fits wide file reading at 1024px without discarding the conversation', () => {
+    const layout = selectWorkbenchLayout({ ...desktop, width: 1024, leftWidth: 420, previewWidth: 1100, rightTab: 'files', filesView: 'preview', previewOpen: true })
+    expect(layout.showConversation).toBe(true)
+    expect(layout.rightWidth).toBeGreaterThanOrEqual(420)
+    expect(layout.leftWidth + layout.rightWidth + 320 + 32).toBeLessThanOrEqual(1024)
+  })
+
+  it('enlarges desktop reading inside the existing right pane and rejects invalid saved widths', () => {
+    const layout = selectWorkbenchLayout({ ...desktop, leftWidth: NaN, previewWidth: Infinity, rightTab: 'files', filesView: 'preview', previewOpen: true, previewExpanded: true })
+    expect(layout.showConversation).toBe(false)
+    expect(layout.showRight).toBe(true)
+    expect(layout.previewExpanded).toBe(true)
+    expect(Number.isFinite(layout.leftWidth + layout.rightWidth)).toBe(true)
+    expect(layout.leftWidth + layout.rightWidth + 20).toBeLessThanOrEqual(1440)
+  })
+})
+
+describe('workbench navigation', () => {
+  function action(node: ReactNode, label: string): (() => void) | undefined {
+    for (const child of Children.toArray(node)) {
+      if (!isValidElement<{ children?: ReactNode; 'aria-label'?: string; onClick?: () => void }>(child)) continue
+      if (child.props['aria-label'] === label) return child.props.onClick
+      const found = action(child.props.children, label)
+      if (found) return found
+    }
+  }
+
+  it('keeps work and file entrances available when the auxiliary pane is closed', () => {
+    const html = renderToStaticMarkup(createElement(TopBar))
+    expect(html).toContain('aria-label="打开工作"')
+    expect(html).toContain('aria-label="打开文件"')
+  })
+
+  it('offers a clear return to the conversation while reading a file on a narrow screen', () => {
+    const html = renderToStaticMarkup(createElement<NonNullable<Parameters<typeof TopBar>[0]>>(TopBar, {
+      compact: true, activePane: 'files', onConversation: () => undefined,
+    }))
+    expect(html).toContain('aria-label="返回对话"')
+    for (const name of ['打开上下文', '打开工作', '打开文件']) expect(html).toContain(`aria-label="${name}"`)
+  })
+
+  it('opens ordinary work with all results reachable instead of only pending confirmations', () => {
+    action(TopBar(), '打开工作')?.()
+    expect(store.openInbox).toHaveBeenCalledOnce()
+    expect(store.setUI).toHaveBeenCalledWith({ inboxFilter: 'all', previewExpanded: false })
+  })
+
+  it('connects both the return action and conversation navigation to the same return path', () => {
+    const onConversation = vi.fn()
+    const topbar = TopBar({ compact: true, activePane: 'files', onConversation })
+    action(topbar, '返回对话')?.()
+    action(topbar, '打开对话')?.()
+    expect(onConversation).toHaveBeenCalledTimes(2)
+  })
+
+  it('names conversation creation accurately and exposes conversation selection to the keyboard', () => {
+    const html = renderToStaticMarkup(createElement(TaskSidebar))
+    expect(html).toContain('新建对话')
+    expect(html).not.toContain('新建任务')
+    expect(html).toMatch(/<button[^>]*class="tsb-task-open"/)
+    expect(html).toContain('更多对话操作')
+    expect(html.match(/材料项目/g)).toHaveLength(1)
+  })
+})