diff --git a/api/routers/__init__.py b/api/routers/__init__.py
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+++ b/api/routers/__init__.py
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+"""
+路由模块
+"""
+
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diff --git a/api/routers/books.py b/api/routers/books.py
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+++ b/api/routers/books.py
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+"""
+回忆录相关 API 路由
+"""
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from database import get_async_db
+from database.models import Book as BookModel
+from services.pdf_service import pdf_service
+
+router = APIRouter(prefix="/api/books", tags=["books"])
+
+
+@router.get("/current")
+async def get_current_book(
+    user_id: str,
+    db: AsyncSession = Depends(get_async_db)
+):
+    """获取当前回忆录"""
+    stmt = select(BookModel).where(BookModel.user_id == user_id).order_by(BookModel.updated_at.desc())
+    result = await db.execute(stmt)
+    book = result.scalar_one_or_none()
+    
+    if not book:
+        return {"message": "No book found"}
+    
+    return {
+        "id": book.id,
+        "title": book.title,
+        "total_pages": book.total_pages,
+        "total_words": book.total_words,
+        "cover_image_url": book.cover_image_url
+    }
+
+
+@router.post("/export-pdf")
+async def export_pdf(
+    book_id: str,
+    user_id: str,
+    db: AsyncSession = Depends(get_async_db)
+):
+    """导出 PDF"""
+    book = await db.get(BookModel, book_id)
+    if not book or book.user_id != user_id:
+        raise HTTPException(status_code=404, detail="Book not found")
+    
+    # 获取所有章节
+    from ..database.models import Chapter
+    stmt = select(Chapter).where(Chapter.user_id == user_id).order_by(Chapter.order_index)
+    result = await db.execute(stmt)
+    chapters = result.scalars().all()
+    
+    # 生成 PDF
+    pdf_bytes = await pdf_service.generate_pdf(book, chapters)
+    
+    return {
+        "pdf_base64": pdf_bytes.decode('latin1'),  # 简化处理，实际应该用 base64
+        "filename": f"{book.title}.pdf"
+    }
+
diff --git a/api/routers/chapters.py b/api/routers/chapters.py
new file mode 100644
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--- /dev/null
+++ b/api/routers/chapters.py
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+"""
+章节相关 API 路由
+"""
+from typing import List
+
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from database import get_async_db
+from database.models import Chapter as ChapterModel
+
+router = APIRouter(prefix="/api/chapters", tags=["chapters"])
+
+
+@router.get("", response_model=List[dict])
+async def get_chapters(
+    user_id: str,
+    db: AsyncSession = Depends(get_async_db)
+):
+    """获取用户所有章节"""
+    stmt = select(ChapterModel).where(ChapterModel.user_id == user_id).order_by(ChapterModel.order_index)
+    result = await db.execute(stmt)
+    chapters = result.scalars().all()
+    
+    return [
+        {
+            "id": ch.id,
+            "title": ch.title,
+            "content": ch.content,
+            "order_index": ch.order_index,
+            "status": ch.status,
+            "category": ch.category,
+            "images": ch.images or []
+        }
+        for ch in chapters
+    ]
+
+
+@router.get("/{chapter_id}", response_model=dict)
+async def get_chapter(
+    chapter_id: str,
+    db: AsyncSession = Depends(get_async_db)
+):
+    """获取章节详情"""
+    chapter = await db.get(ChapterModel, chapter_id)
+    if not chapter:
+        raise HTTPException(status_code=404, detail="Chapter not found")
+    
+    return {
+        "id": chapter.id,
+        "title": chapter.title,
+        "content": chapter.content,
+        "order_index": chapter.order_index,
+        "status": chapter.status,
+        "category": chapter.category,
+        "images": chapter.images or []
+    }
+
+
+@router.post("/{chapter_id}/regenerate")
+async def regenerate_chapter(
+    chapter_id: str,
+    db: AsyncSession = Depends(get_async_db)
+):
+    """重新整理章节"""
+    # TODO: 实现重新整理逻辑
+    return {"status": "ok", "message": "Chapter regeneration triggered"}
+
diff --git a/api/routers/conversations.py b/api/routers/conversations.py
new file mode 100644
index 0000000..e4f0d0c
--- /dev/null
+++ b/api/routers/conversations.py
@@ -0,0 +1,89 @@
+"""
+对话相关 API 路由
+"""
+from datetime import datetime, timezone
+from typing import List, Optional
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+import uuid
+
+from database import get_async_db, Conversation, Segment, User
+from database.models import Conversation as ConversationModel, Segment as SegmentModel
+
+router = APIRouter(prefix="/api/conversations", tags=["conversations"])
+
+
+@router.post("")
+async def create_conversation(
+    user_id: str,
+    db: AsyncSession = Depends(get_async_db)
+):
+    """创建新对话"""
+    conversation = ConversationModel(
+        id=str(uuid.uuid4()),
+        user_id=user_id,
+        started_at=datetime.now(timezone.utc),
+        status="active"
+    )
+    db.add(conversation)
+    await db.commit()
+    await db.refresh(conversation)
+    
+    return {
+        "id": conversation.id,
+        "user_id": conversation.user_id,
+        "started_at": conversation.started_at.isoformat(),
+        "status": conversation.status
+    }
+
+
+@router.get("/{conversation_id}")
+async def get_conversation(
+    conversation_id: str,
+    db: AsyncSession = Depends(get_async_db)
+):
+    """获取对话详情"""
+    conversation = await db.get(ConversationModel, conversation_id)
+    if not conversation:
+        raise HTTPException(status_code=404, detail="Conversation not found")
+    
+    return {
+        "id": conversation.id,
+        "user_id": conversation.user_id,
+        "started_at": conversation.started_at.isoformat(),
+        "ended_at": conversation.ended_at.isoformat() if conversation.ended_at else None,
+        "duration_seconds": conversation.duration_seconds,
+        "summary": conversation.summary,
+        "status": conversation.status,
+        "current_topic": conversation.current_topic,
+        "conversation_stage": conversation.conversation_stage
+    }
+
+
+@router.post("/{conversation_id}/end")
+async def end_conversation(
+    conversation_id: str,
+    db: AsyncSession = Depends(get_async_db)
+):
+    """结束对话"""
+    conversation = await db.get(ConversationModel, conversation_id)
+    if not conversation:
+        raise HTTPException(status_code=404, detail="Conversation not found")
+    
+    conversation.status = "ended"
+    conversation.ended_at = datetime.now(timezone.utc)
+    
+    if conversation.started_at:
+        duration = (conversation.ended_at - conversation.started_at).total_seconds()
+        conversation.duration_seconds = int(duration)
+    
+    await db.commit()
+    
+    return {
+        "id": conversation.id,
+        "status": conversation.status,
+        "ended_at": conversation.ended_at.isoformat(),
+        "duration_seconds": conversation.duration_seconds
+    }
+
diff --git a/api/routers/websocket.py b/api/routers/websocket.py
new file mode 100644
index 0000000..897790e
--- /dev/null
+++ b/api/routers/websocket.py
@@ -0,0 +1,273 @@
+"""
+WebSocket 路由：实时对话通信
+"""
+import uuid
+from datetime import datetime, timezone
+from enum import Enum
+from typing import Dict
+
+from fastapi import WebSocket, WebSocketDisconnect, HTTPException
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from agents import ConversationAgent, MemoryAgent
+from agents.prompts import ConversationStage
+from database import get_async_db
+from database.models import Conversation, Segment
+from services.asr_service import asr_service
+from services.tts_service import tts_service
+
+
+class MessageType(str, Enum):
+    """WebSocket 消息类型"""
+    CONNECT = "connect"
+    AUDIO_CHUNK = "audio_chunk"
+    TRANSCRIPT = "transcript"
+    AGENT_RESPONSE = "agent_response"
+    TTS_AUDIO = "tts_audio"
+    END_CONVERSATION = "end_conversation"
+    ERROR = "error"
+
+
+# 连接管理
+class ConnectionManager:
+    """WebSocket 连接管理器"""
+    
+    def __init__(self):
+        self.active_connections: Dict[str, WebSocket] = {}
+        self.conversation_agents: Dict[str, ConversationAgent] = {}
+        self.memory_agent = MemoryAgent()
+    
+    async def connect(self, websocket: WebSocket, conversation_id: str):
+        """建立连接"""
+        await websocket.accept()
+        self.active_connections[conversation_id] = websocket
+        self.conversation_agents[conversation_id] = ConversationAgent()
+    
+    def disconnect(self, conversation_id: str):
+        """断开连接"""
+        if conversation_id in self.active_connections:
+            del self.active_connections[conversation_id]
+        if conversation_id in self.conversation_agents:
+            self.conversation_agents[conversation_id].clear_memory(conversation_id)
+            del self.conversation_agents[conversation_id]
+    
+    async def send_message(self, conversation_id: str, message: dict):
+        """发送消息"""
+        if conversation_id in self.active_connections:
+            websocket = self.active_connections[conversation_id]
+            await websocket.send_json(message)
+    
+    async def receive_message(self, conversation_id: str) -> dict:
+        """接收消息"""
+        if conversation_id in self.active_connections:
+            websocket = self.active_connections[conversation_id]
+            return await websocket.receive_json()
+        raise HTTPException(status_code=404, detail="Connection not found")
+
+
+manager = ConnectionManager()
+
+
+async def websocket_endpoint(websocket: WebSocket, conversation_id: str):
+    """
+    WebSocket 端点：处理实时对话
+    
+    Args:
+        websocket: WebSocket 连接
+        conversation_id: 对话 ID
+    """
+    await manager.connect(websocket, conversation_id)
+    
+    try:
+        # 发送连接确认
+        await manager.send_message(conversation_id, {
+            "type": MessageType.CONNECT,
+            "conversation_id": conversation_id,
+            "data": {"status": "connected"},
+            "timestamp": datetime.now(timezone.utc).isoformat()
+        })
+        
+        # 从数据库获取对话信息
+        async for db in get_async_db():
+            conversation = await db.get(Conversation, conversation_id)
+            if not conversation:
+                # 如果对话不存在，创建新对话
+                from database.models import User as UserModel
+                # 假设用户 ID 从连接参数获取（实际应该从认证获取）
+                user_id = "default_user"  # TODO: 从认证获取实际用户 ID
+                
+                conversation = Conversation(
+                    id=conversation_id,
+                    user_id=user_id,
+                    started_at=datetime.now(timezone.utc),
+                    status="active"
+                )
+                db.add(conversation)
+                await db.commit()
+            
+            current_stage = ConversationStage(conversation.conversation_stage) if conversation.conversation_stage else ConversationStage.CHILDHOOD
+            
+            # 主循环：处理消息
+            while True:
+                try:
+                    message = await websocket.receive_json()
+                    msg_type = message.get("type")
+                    
+                    if msg_type == MessageType.AUDIO_CHUNK:
+                        # 处理音频块
+                        audio_data = message.get("data", {}).get("audio_base64", "")
+                        
+                        # 调用 ASR 服务转文字
+                        transcript = await asr_service.transcribe(audio_data)
+                        
+                        # 保存段落到数据库
+                        segment = Segment(
+                            id=str(uuid.uuid4()),
+                            conversation_id=conversation_id,
+                            transcript_text=transcript,
+                            processed=False
+                        )
+                        db.add(segment)
+                        await db.commit()
+                        
+                        # 发送转写结果
+                        await manager.send_message(conversation_id, {
+                            "type": MessageType.TRANSCRIPT,
+                            "conversation_id": conversation_id,
+                            "data": {"text": transcript},
+                            "timestamp": datetime.now(timezone.utc).isoformat()
+                        })
+                        
+                        # Agent 生成回应
+                        agent = manager.conversation_agents.get(conversation_id)
+                        if agent:
+                            # 检测对话阶段
+                            detected_stage = agent.detect_stage(conversation_id, transcript)
+                            if detected_stage != current_stage:
+                                current_stage = detected_stage
+                                conversation.conversation_stage = current_stage.value
+                                await db.commit()
+                            
+                            # 获取已聊话题
+                            stmt_segments = select(Segment).where(
+                                Segment.conversation_id == conversation_id
+                            ).order_by(Segment.created_at)
+                            result_segments = await db.execute(stmt_segments)
+                            previous_segments = result_segments.scalars().all()
+                            covered_topics = [seg.topic_category for seg in previous_segments if seg.topic_category]
+                            
+                            # 生成回应
+                            response = agent.generate_response(
+                                conversation_id=conversation_id,
+                                user_message=transcript,
+                                current_stage=current_stage,
+                                covered_topics=covered_topics
+                            )
+                            
+                            # 更新段落的 Agent 回应
+                            segment.agent_response = response
+                            await db.commit()
+                            
+                            # 发送 Agent 回应
+                            await manager.send_message(conversation_id, {
+                                "type": MessageType.AGENT_RESPONSE,
+                                "conversation_id": conversation_id,
+                                "data": {"text": response},
+                                "timestamp": datetime.now(timezone.utc).isoformat()
+                            })
+                            
+                            # 调用 TTS 服务生成音频
+                            tts_audio = await tts_service.synthesize(response)
+                            
+                            # 发送 TTS 音频
+                            await manager.send_message(conversation_id, {
+                                "type": MessageType.TTS_AUDIO,
+                                "conversation_id": conversation_id,
+                                "data": {"audio_base64": tts_audio},
+                                "timestamp": datetime.now(timezone.utc).isoformat()
+                            })
+                    
+                    elif msg_type == MessageType.END_CONVERSATION:
+                        # 结束对话
+                        conversation.status = "ended"
+                        conversation.ended_at = datetime.now(timezone.utc)
+                        await db.commit()
+                        
+                        # 触发整理 Agent
+                        await process_conversation_segments(conversation_id, db)
+                        
+                        await manager.send_message(conversation_id, {
+                            "type": MessageType.END_CONVERSATION,
+                            "conversation_id": conversation_id,
+                            "data": {"status": "ended"},
+                            "timestamp": datetime.now(timezone.utc).isoformat()
+                        })
+                        break
+                
+                except Exception as e:
+                    await manager.send_message(conversation_id, {
+                        "type": MessageType.ERROR,
+                        "data": {"message": str(e)},
+                        "timestamp": datetime.now(timezone.utc).isoformat()
+                    })
+    
+    except WebSocketDisconnect:
+        manager.disconnect(conversation_id)
+    except Exception:
+        manager.disconnect(conversation_id)
+        raise
+
+
+async def process_conversation_segments(conversation_id: str, db: AsyncSession):
+    """
+    处理对话段落，生成章节
+    
+    Args:
+        conversation_id: 对话 ID
+        db: 数据库会话
+    """
+    # 获取所有未处理的段落
+    stmt = select(Segment).where(
+        Segment.conversation_id == conversation_id,
+        Segment.processed == False
+    )
+    result = await db.execute(stmt)
+    segments = result.scalars().all()
+    
+    if not segments:
+        return
+    
+    # 准备段落数据
+    segments_data = [
+        {"transcript_text": seg.transcript_text}
+        for seg in segments
+    ]
+    
+    # 调用整理 Agent
+    memory_agent = manager.memory_agent
+    chapters_data = memory_agent.process_segments(segments_data)
+    
+    # 保存章节到数据库
+    from database import Chapter
+    conversation = await db.get(Conversation, conversation_id)
+    
+    for category, chapter_data in chapters_data.items():
+        chapter = Chapter(
+            id=str(uuid.uuid4()),
+            user_id=conversation.user_id,
+            title=chapter_data["title"],
+            content=chapter_data["content"],
+            order_index=chapter_data.get("order_index", 999),
+            status="completed",
+            category=category,
+            images=chapter_data.get("image_suggestions", [])
+        )
+        db.add(chapter)
+    
+    # 标记段落为已处理
+    for seg in segments:
+        seg.processed = True
+    
+    await db.commit()
+