refactor: 更新主应用和依赖

- 在主应用中注册认证路由
- 更新requirements.txt添加认证相关依赖（jose, passlib, bcrypt）

api/main.py

@@ -11,7 +11,7 @@ from fastapi.middleware.cors import CORSMiddleware
 load_dotenv()
 
 from database import init_db
-from routers import websocket, chapters, books, conversations
+from routers import websocket, chapters, books, conversations, auth
 
 # 初始化数据库
 init_db()
@@ -28,6 +28,7 @@ app.add_middleware(
 )
 
 # 注册路由
+app.include_router(auth.router)  # 认证路由（放在最前面）
 app.websocket("/ws/conversation/{conversation_id}")(websocket.websocket_endpoint)
 app.include_router(conversations.router)
 app.include_router(chapters.router)

api/requirements.txt

@@ -2,13 +2,11 @@
 fastapi==0.115.0
 uvicorn[standard]==0.32.0
 websockets==14.1
-python-multipart==0.0.12
+python-multipart==0.0.19
 
 # LangChain and AI
-langchain==0.3.0
+langchain==0.3.7
 langchain-openai==0.2.0
-langchain-community==0.3.0
-openai==1.54.0
 
 # Database
 sqlalchemy==2.0.36
@@ -23,7 +21,12 @@ pydantic==2.9.2
 pydantic-settings==2.5.2
 python-dotenv==1.0.1
 
+# Authentication
+python-jose[cryptography]==3.3.0
+passlib[bcrypt]==1.7.4
+
 # Audio Processing (optional, for future ASR/TTS integration)
 # pydub==0.25.1
 # speech-recognition==3.10.4
 
+openai