diff --git a/web/src/App.tsx b/web/src/App.tsx
index 75ed1a64..35d564aa 100644
--- a/web/src/App.tsx
+++ b/web/src/App.tsx
@@ -1,8 +1,7 @@
 import { useState, useMemo, useEffect, useRef, useCallback } from 'react';
 import { AppShell } from './components/layout/AppShell';
 import { DocumentPane } from './components/doc/DocumentPane';
-import { MessageStream } from './components/chat/MessageStream';
-import { InputArea } from './components/chat/InputArea';
+import { ChatColumn } from './components/chat/ChatColumn';
 import { fetchFreeformDoc } from './api/freeformDoc';
 import type { DiffResult, OverlayMode } from './features/documentRevision/types';
 import { fetchProjectLineage, getProject } from './api/projectWorkflow';
@@ -35,7 +34,6 @@ import {
 import { DocumentLineage } from './types/projectWorkflow';
 import { StaleDocumentNotice } from './components/workflow/StaleDocumentNotice';
 import { StageAdvanceBanner } from './components/workflow/StageAdvanceBanner';
-import { ProposalConfirmCard } from './components/doc/ProposalConfirmCard';
 import { UserProjectRightsModal } from './components/user/UserProjectRightsModal';
 import { UserSettingsModal } from './components/user/UserSettingsModal';
 import { OnDemand } from './components/lazy/OnDemand';
@@ -114,13 +112,8 @@ import { RequestEpoch, shareInflight } from './data/initFanout';
 import {
   resolveSessionProjectId,
 } from './lib/sessionAdapter';
-import { CategoryFilterBar } from './components/history/CategoryFilterBar';
-import { HistoryCalendar } from './components/history/HistoryCalendar';
-import { ChatSearchModal } from './components/history/ChatSearchModal';
-import { DigestTimelineModal } from './components/history/DigestTimelineModal';
-import { navigateToAnchor, parseAnchorHash, resolveTurnAnchorId } from './engine/anchorNavigator';
+import { navigateToAnchor, parseAnchorHash } from './engine/anchorNavigator';
 import { useUnreadMarks } from './hooks/useUnreadMarks';
-import { CategoryDock } from './components/chat/CategoryDock';
 import { fetchChatCategories, fetchChatDates } from './api/chatWindow';
 import { ChatCategoryStat, ChatDateStat, QuotedMessage } from './types/workbench';
 import { saveFile } from './data/fileStore';
@@ -134,9 +127,6 @@ export {
 
 const loadAdminConsoleView = () =>
   import('./components/admin/console/AdminConsoleView').then((m) => ({ default: m.AdminConsoleView }));
-const loadChatExportModal = () =>
-  import('./components/history/ChatExportModal').then((m) => ({ default: m.ChatExportModal }));
-
 export default function App() {
   // Wave 2：启动时幂等剔除 localStorage 中的 demo seed 残留（须先于 load*）
   purgeDemoSeedsFromLocalStorage();
@@ -1553,156 +1543,42 @@ export default function App() {
         }}
         workflowBanner={workflowBanner}
         chatContent={
-          <div style={{ flex: 1, display: 'flex', flexDirection: 'column', height: '100%', overflow: 'hidden' }}>
-            {/* P1, P2, P3: 顶部分类统计过滤栏、历史日历、三模搜索、智能摘要、导出与未读角标 */}
-            <CategoryFilterBar
-              categories={categoryStats}
-              selectedCategory={chatWindow.selectedCategory}
-              onSelectCategory={chatWindow.setSelectedCategory}
-              onNavigateToCategory={(_cat, lastMessageId) => {
-                if (lastMessageId && activeSessionId) {
-                  const anchorId = resolveTurnAnchorId(lastMessageId, chatWindow.allMessages);
-                  navigateToAnchor(
-                    { sessionId: activeSessionId, messageId: anchorId, highlightMs: 2000 },
-                    { sessionId: activeSessionId, loadDayForAnchor: chatWindow.loadDayForAnchor }
-                  );
-                }
-              }}
-              onToggleCalendar={() => setIsCalendarOpen((prev) => !prev)}
-              isCalendarOpen={isCalendarOpen}
-              onOpenSearch={() => setIsSearchOpen(true)}
-              onOpenDigest={() => setIsDigestOpen(true)}
-              onOpenExport={() => setIsExportOpen(true)}
-              unreadTotal={unreadTotal}
-            />
-            {isCalendarOpen && (
-              <HistoryCalendar
-                dateStats={dateStats}
-                unreadMarks={unreadMarks}
-                onSelectDate={(date) => {
-                  chatWindow.jumpToDate(date);
-                  setIsCalendarOpen(false);
-                }}
-                onClose={() => setIsCalendarOpen(false)}
-              />
-            )}
-            {isSearchOpen && (
-              <ChatSearchModal
-                sessionId={activeSessionId}
-                onSelectHit={(hit) => {
-                  navigateToAnchor(
-                    { sessionId: activeSessionId, messageId: hit.message_id },
-                    { sessionId: activeSessionId, loadDayForAnchor: chatWindow.loadDayForAnchor }
-                  );
-                  setIsSearchOpen(false);
-                }}
-                onClose={() => setIsSearchOpen(false)}
-              />
-            )}
-            {isDigestOpen && (
-              <DigestTimelineModal
-                sessionId={activeSessionId}
-                onJumpToMessage={(messageId) => {
-                  navigateToAnchor(
-                    { sessionId: activeSessionId, messageId },
-                    { sessionId: activeSessionId, loadDayForAnchor: chatWindow.loadDayForAnchor }
-                  );
-                  setIsDigestOpen(false);
-                }}
-                onClose={() => setIsDigestOpen(false)}
-              />
-            )}
-            {isExportOpen && (
-              <OnDemand
-                label="聊天导出"
-                load={loadChatExportModal}
-                componentProps={{
-                  isOpen: isExportOpen,
-                  onClose: () => setIsExportOpen(false),
-                  sessionId: activeSessionId,
-                  dayStack: chatWindow.displayDayStack,
-                }}
-              />
-            )}
-            <div style={{ position: 'relative', flex: 1, minHeight: 0, display: 'flex', flexDirection: 'column' }}>
-              <MessageStream
-                sessionId={activeSessionId}
-                dayStack={chatWindow.displayDayStack}
-                isLoadingOlder={chatWindow.phase === 'loading_older'}
-                hasMoreBefore={chatWindow.hasMoreBefore}
-                onLoadOlder={chatWindow.loadOlder}
-                onLoadFullDay={chatWindow.loadFullDay}
-                onOpenCase={handleSelectDoc}
-                onCardAction={handleCardAction}
-                onErrorAction={handleErrorAction}
-                onQuote={handleQuoteMessage}
-                onNavigateToAnchor={(targetAnchor) => {
-                  navigateToAnchor(
-                    { sessionId: activeSessionId, messageId: targetAnchor },
-                    { sessionId: activeSessionId, loadDayForAnchor: chatWindow.loadDayForAnchor }
-                  );
-                }}
-                selectedCategory={chatWindow.selectedCategory}
-                unreadMessageIds={unreadMessageIds}
-                onSaveToPrivate={handleSaveMessageToPrivate}
-                onExportDocx={handleExportReplyDocx}
-                onOpenDoc={handleSelectDoc}
-              />
-              <CategoryDock
-                categories={categoryStats}
-                activeCategory={chatWindow.selectedCategory}
-                messages={chatWindow.allMessages}
-                unreadTotal={unreadTotal}
-                unreadMessageIds={unreadMessageIds}
-                isAllReadCompleted={isAllReadCompleted}
-                onConsumeNextUnread={async () => {
-                  const targetId = await consumeNextUnread();
-                  if (targetId && activeSessionId) {
-                    navigateToAnchor(
-                      { sessionId: activeSessionId, messageId: targetId, highlightMs: 2000 },
-                      { sessionId: activeSessionId, loadDayForAnchor: chatWindow.loadDayForAnchor }
-                    );
-                  }
-                }}
-                onNavigateToCategory={(_cat, lastMessageId) => {
-                  if (lastMessageId && activeSessionId) {
-                    const anchorId = resolveTurnAnchorId(lastMessageId, chatWindow.allMessages);
-                    navigateToAnchor(
-                      { sessionId: activeSessionId, messageId: anchorId, highlightMs: 2000 },
-                      { sessionId: activeSessionId, loadDayForAnchor: chatWindow.loadDayForAnchor }
-                    );
-                  }
-                }}
-                onSelectCategory={chatWindow.setSelectedCategory}
-              />
-            </div>
-            {pendingProposal && (
-              <div style={{ padding: '0 16px' }}>
-                {proposalError && (
-                  <div style={{ color: 'var(--danger, #b91c1c)', fontSize: 12, marginBottom: 8 }}>
-                    {proposalError}
-                  </div>
-                )}
-                <ProposalConfirmCard
-                  proposedChanges={pendingProposal.changes}
-                  impactAnalysis={pendingProposal.impact}
-                  potentialRisk={pendingProposal.risk}
-                  onAccept={handleAcceptProposal}
-                  onReject={handleRejectProposal}
-                />
-              </div>
-            )}
-            <InputArea
-              onSendMessage={handleSendMessage}
-              isThinking={isThinking}
-              isStreaming={isStreamingActive}
-              onStopStreaming={handleStopStreaming}
-              quotes={activeQuotes}
-              onRemoveQuote={handleRemoveQuote}
-              disabled={isCurrentProjectExited}
-              disabledMessage="您已退出该研发项目。依据受控体系审计要求，会话已转为只读留痕模式，无法继续发送消息。"
-            />
-          </div>
+          <ChatColumn
+            activeSessionId={activeSessionId}
+            categoryStats={categoryStats}
+            chatWindow={chatWindow}
+            isCalendarOpen={isCalendarOpen}
+            setIsCalendarOpen={setIsCalendarOpen}
+            isSearchOpen={isSearchOpen}
+            setIsSearchOpen={setIsSearchOpen}
+            isDigestOpen={isDigestOpen}
+            setIsDigestOpen={setIsDigestOpen}
+            isExportOpen={isExportOpen}
+            setIsExportOpen={setIsExportOpen}
+            unreadTotal={unreadTotal}
+            dateStats={dateStats}
+            unreadMarks={unreadMarks}
+            unreadMessageIds={unreadMessageIds}
+            isAllReadCompleted={isAllReadCompleted}
+            consumeNextUnread={consumeNextUnread}
+            handleSelectDoc={handleSelectDoc}
+            handleCardAction={handleCardAction}
+            handleErrorAction={handleErrorAction}
+            handleQuoteMessage={handleQuoteMessage}
+            handleSaveMessageToPrivate={handleSaveMessageToPrivate}
+            handleExportReplyDocx={handleExportReplyDocx}
+            pendingProposal={pendingProposal}
+            proposalError={proposalError}
+            handleAcceptProposal={handleAcceptProposal}
+            handleRejectProposal={handleRejectProposal}
+            handleSendMessage={handleSendMessage}
+            isThinking={isThinking}
+            isStreamingActive={isStreamingActive}
+            handleStopStreaming={handleStopStreaming}
+            activeQuotes={activeQuotes}
+            handleRemoveQuote={handleRemoveQuote}
+            isCurrentProjectExited={isCurrentProjectExited}
+          />
         }
         docContent={
           <DocumentPane
diff --git a/web/src/components/chat/ChatColumn.test.ts b/web/src/components/chat/ChatColumn.test.ts
new file mode 100644
index 00000000..0a01cf05
--- /dev/null
+++ b/web/src/components/chat/ChatColumn.test.ts
@@ -0,0 +1,14 @@
+import assert from 'node:assert/strict';
+import { readFileSync } from 'node:fs';
+import test from 'node:test';
+
+test('chat column lives outside the workbench shell', () => {
+  const app = readFileSync(new URL('../../App.tsx', import.meta.url), 'utf8');
+  const column = readFileSync(new URL('./ChatColumn.tsx', import.meta.url), 'utf8');
+  assert.equal((app.match(/<ChatColumn\b/g) || []).length, 1);
+  assert.equal(app.includes('<MessageStream'), false);
+  assert.equal(app.includes('<InputArea'), false);
+  assert.equal(column.includes('<MessageStream'), true);
+  assert.equal(column.includes('<InputArea'), true);
+  assert.equal(column.includes('ProposalConfirmCard'), true);
+});
diff --git a/web/src/components/chat/ChatColumn.tsx b/web/src/components/chat/ChatColumn.tsx
new file mode 100644
index 00000000..03a35d00
--- /dev/null
+++ b/web/src/components/chat/ChatColumn.tsx
@@ -0,0 +1,242 @@
+import type React from 'react';
+import { OnDemand } from '../lazy/OnDemand';
+import { CategoryFilterBar } from '../history/CategoryFilterBar';
+import { HistoryCalendar } from '../history/HistoryCalendar';
+import { ChatSearchModal } from '../history/ChatSearchModal';
+import { DigestTimelineModal } from '../history/DigestTimelineModal';
+import { navigateToAnchor, resolveTurnAnchorId } from '../../engine/anchorNavigator';
+import { CategoryDock } from './CategoryDock';
+import { MessageStream } from './MessageStream';
+import { InputArea } from './InputArea';
+import { ProposalConfirmCard } from '../doc/ProposalConfirmCard';
+import type { UseChatWindowReturn } from '../../hooks/useChatWindow';
+import type { ChatCategoryStat, ChatDateStat, ChatMessage, QuotedMessage, UnreadMark } from '../../types/workbench';
+
+const loadChatExportModal = () =>
+  import('../history/ChatExportModal').then((m) => ({ default: m.ChatExportModal }));
+
+export interface ChatColumnProps {
+  activeSessionId: string;
+  categoryStats: ChatCategoryStat[];
+  chatWindow: UseChatWindowReturn;
+  isCalendarOpen: boolean;
+  setIsCalendarOpen: (next: boolean | ((prev: boolean) => boolean)) => void;
+  isSearchOpen: boolean;
+  setIsSearchOpen: (open: boolean) => void;
+  isDigestOpen: boolean;
+  setIsDigestOpen: (open: boolean) => void;
+  isExportOpen: boolean;
+  setIsExportOpen: (open: boolean) => void;
+  unreadTotal: number;
+  dateStats: ChatDateStat[];
+  unreadMarks: UnreadMark[];
+  unreadMessageIds: number[];
+  isAllReadCompleted: boolean;
+  consumeNextUnread: () => Promise<number | null | undefined>;
+  handleSelectDoc: (id: string) => void;
+  handleCardAction: (cardId: string, actionId: string, payload?: unknown) => void;
+  handleErrorAction: (messageId: string, action: 'retry' | 'continue' | 'restart') => void;
+  handleQuoteMessage: (message: ChatMessage) => void;
+  handleSaveMessageToPrivate: (message: ChatMessage) => void;
+  handleExportReplyDocx: (message: ChatMessage) => void | Promise<void>;
+  pendingProposal: { changes: string; impact: string; risk: string } | null;
+  proposalError: string | null;
+  handleAcceptProposal: () => void;
+  handleRejectProposal: () => void;
+  handleSendMessage: React.ComponentProps<typeof InputArea>['onSendMessage'];
+  isThinking: boolean;
+  isStreamingActive: boolean;
+  handleStopStreaming: () => void;
+  activeQuotes: QuotedMessage[];
+  handleRemoveQuote: (index: number) => void;
+  isCurrentProjectExited: boolean;
+}
+
+export function ChatColumn({
+  activeSessionId,
+  categoryStats,
+  chatWindow,
+  isCalendarOpen,
+  setIsCalendarOpen,
+  isSearchOpen,
+  setIsSearchOpen,
+  isDigestOpen,
+  setIsDigestOpen,
+  isExportOpen,
+  setIsExportOpen,
+  unreadTotal,
+  dateStats,
+  unreadMarks,
+  unreadMessageIds,
+  isAllReadCompleted,
+  consumeNextUnread,
+  handleSelectDoc,
+  handleCardAction,
+  handleErrorAction,
+  handleQuoteMessage,
+  handleSaveMessageToPrivate,
+  handleExportReplyDocx,
+  pendingProposal,
+  proposalError,
+  handleAcceptProposal,
+  handleRejectProposal,
+  handleSendMessage,
+  isThinking,
+  isStreamingActive,
+  handleStopStreaming,
+  activeQuotes,
+  handleRemoveQuote,
+  isCurrentProjectExited,
+}: ChatColumnProps) {
+  return (
+    <div style={{ flex: 1, display: 'flex', flexDirection: 'column', height: '100%', overflow: 'hidden' }}>
+      <CategoryFilterBar
+        categories={categoryStats}
+        selectedCategory={chatWindow.selectedCategory}
+        onSelectCategory={chatWindow.setSelectedCategory}
+        onNavigateToCategory={(_cat, lastMessageId) => {
+          if (lastMessageId && activeSessionId) {
+            const anchorId = resolveTurnAnchorId(lastMessageId, chatWindow.allMessages);
+            navigateToAnchor(
+              { sessionId: activeSessionId, messageId: anchorId, highlightMs: 2000 },
+              { sessionId: activeSessionId, loadDayForAnchor: chatWindow.loadDayForAnchor }
+            );
+          }
+        }}
+        onToggleCalendar={() => setIsCalendarOpen((prev) => !prev)}
+        isCalendarOpen={isCalendarOpen}
+        onOpenSearch={() => setIsSearchOpen(true)}
+        onOpenDigest={() => setIsDigestOpen(true)}
+        onOpenExport={() => setIsExportOpen(true)}
+        unreadTotal={unreadTotal}
+      />
+      {isCalendarOpen && (
+        <HistoryCalendar
+          dateStats={dateStats}
+          unreadMarks={unreadMarks}
+          onSelectDate={(date) => {
+            chatWindow.jumpToDate(date);
+            setIsCalendarOpen(false);
+          }}
+          onClose={() => setIsCalendarOpen(false)}
+        />
+      )}
+      {isSearchOpen && (
+        <ChatSearchModal
+          sessionId={activeSessionId}
+          onSelectHit={(hit) => {
+            navigateToAnchor(
+              { sessionId: activeSessionId, messageId: hit.message_id },
+              { sessionId: activeSessionId, loadDayForAnchor: chatWindow.loadDayForAnchor }
+            );
+            setIsSearchOpen(false);
+          }}
+          onClose={() => setIsSearchOpen(false)}
+        />
+      )}
+      {isDigestOpen && (
+        <DigestTimelineModal
+          sessionId={activeSessionId}
+          onJumpToMessage={(messageId) => {
+            navigateToAnchor(
+              { sessionId: activeSessionId, messageId },
+              { sessionId: activeSessionId, loadDayForAnchor: chatWindow.loadDayForAnchor }
+            );
+            setIsDigestOpen(false);
+          }}
+          onClose={() => setIsDigestOpen(false)}
+        />
+      )}
+      {isExportOpen && (
+        <OnDemand
+          label="聊天导出"
+          load={loadChatExportModal}
+          componentProps={{
+            isOpen: isExportOpen,
+            onClose: () => setIsExportOpen(false),
+            sessionId: activeSessionId,
+            dayStack: chatWindow.displayDayStack,
+          }}
+        />
+      )}
+      <div style={{ position: 'relative', flex: 1, minHeight: 0, display: 'flex', flexDirection: 'column' }}>
+        <MessageStream
+          sessionId={activeSessionId}
+          dayStack={chatWindow.displayDayStack}
+          isLoadingOlder={chatWindow.phase === 'loading_older'}
+          hasMoreBefore={chatWindow.hasMoreBefore}
+          onLoadOlder={chatWindow.loadOlder}
+          onLoadFullDay={chatWindow.loadFullDay}
+          onOpenCase={handleSelectDoc}
+          onCardAction={handleCardAction}
+          onErrorAction={handleErrorAction}
+          onQuote={handleQuoteMessage}
+          onNavigateToAnchor={(targetAnchor) => {
+            navigateToAnchor(
+              { sessionId: activeSessionId, messageId: targetAnchor },
+              { sessionId: activeSessionId, loadDayForAnchor: chatWindow.loadDayForAnchor }
+            );
+          }}
+          selectedCategory={chatWindow.selectedCategory}
+          unreadMessageIds={unreadMessageIds}
+          onSaveToPrivate={handleSaveMessageToPrivate}
+          onExportDocx={handleExportReplyDocx}
+          onOpenDoc={handleSelectDoc}
+        />
+        <CategoryDock
+          categories={categoryStats}
+          activeCategory={chatWindow.selectedCategory}
+          messages={chatWindow.allMessages}
+          unreadTotal={unreadTotal}
+          unreadMessageIds={unreadMessageIds}
+          isAllReadCompleted={isAllReadCompleted}
+          onConsumeNextUnread={async () => {
+            const targetId = await consumeNextUnread();
+            if (targetId && activeSessionId) {
+              navigateToAnchor(
+                { sessionId: activeSessionId, messageId: targetId, highlightMs: 2000 },
+                { sessionId: activeSessionId, loadDayForAnchor: chatWindow.loadDayForAnchor }
+              );
+            }
+          }}
+          onNavigateToCategory={(_cat, lastMessageId) => {
+            if (lastMessageId && activeSessionId) {
+              const anchorId = resolveTurnAnchorId(lastMessageId, chatWindow.allMessages);
+              navigateToAnchor(
+                { sessionId: activeSessionId, messageId: anchorId, highlightMs: 2000 },
+                { sessionId: activeSessionId, loadDayForAnchor: chatWindow.loadDayForAnchor }
+              );
+            }
+          }}
+          onSelectCategory={chatWindow.setSelectedCategory}
+        />
+      </div>
+      {pendingProposal && (
+        <div style={{ padding: '0 16px' }}>
+          {proposalError && (
+            <div style={{ color: 'var(--danger, #b91c1c)', fontSize: 12, marginBottom: 8 }}>
+              {proposalError}
+            </div>
+          )}
+          <ProposalConfirmCard
+            proposedChanges={pendingProposal.changes}
+            impactAnalysis={pendingProposal.impact}
+            potentialRisk={pendingProposal.risk}
+            onAccept={handleAcceptProposal}
+            onReject={handleRejectProposal}
+          />
+        </div>
+      )}
+      <InputArea
+        onSendMessage={handleSendMessage}
+        isThinking={isThinking}
+        isStreaming={isStreamingActive}
+        onStopStreaming={handleStopStreaming}
+        quotes={activeQuotes}
+        onRemoveQuote={handleRemoveQuote}
+        disabled={isCurrentProjectExited}
+        disabledMessage="您已退出该研发项目。依据受控体系审计要求，会话已转为只读留痕模式，无法继续发送消息。"
+      />
+    </div>
+  );
+}