Refactor code structure for improved readability and maintainability

backend/app/api/__init__.py

@@ -1,2 +1 @@
-# src/api/__init__.py
-"""API接口模块"""
+"""API接口模块"""

backend/app/api/models/__init__.py

@@ -1,4 +1,3 @@
-# src/api/models/__init__.py
 """API数据模型"""
 
 from .document import (
@@ -19,4 +18,4 @@ __all__ = [
     "SearchResponse",
     "DocumentStatusResponse",
     "ErrorResponse"
-]
+]

backend/app/api/models/document.py

@@ -1,4 +1,3 @@
-# src/api/models/document.py
 """文档相关Pydantic数据模型"""
 
 from pydantic import BaseModel, Field
@@ -60,4 +59,4 @@ class ErrorResponse(BaseModel):
     """错误响应"""
     error: str = Field(..., description="错误类型")
     message: str = Field(..., description="错误消息")
-    timestamp: datetime = Field(default_factory=datetime.now, description="时间戳")
+    timestamp: datetime = Field(default_factory=datetime.now, description="时间戳")

backend/app/api/routes/__init__.py

@@ -1,4 +1,3 @@
-# src/api/routes/__init__.py
 """API路由模块"""
 
 from fastapi import APIRouter
@@ -14,4 +13,4 @@ api_router.include_router(documents_router)
 api_router.include_router(knowledge_router)
 api_router.include_router(agent_router)
 
-__all__ = ["api_router", "documents_router", "knowledge_router", "agent_router"]
+__all__ = ["api_router", "documents_router", "knowledge_router", "agent_router"]

backend/app/api/routes/agent.py

@@ -1,4 +1,3 @@
-# src/api/routes/agent.py
 """Agent API接口 - 问答对话接口"""
 
 from fastapi import APIRouter, HTTPException, Depends

backend/app/api/routes/documents.py

@@ -1,4 +1,3 @@
-# src/api/routes/documents.py
 """文档上传与处理接口"""
 
 from fastapi import APIRouter, UploadFile, File, Form, HTTPException

backend/app/api/routes/knowledge.py

@@ -1,4 +1,3 @@
-# src/api/routes/knowledge.py
 """知识库检索接口"""
 
 from fastapi import APIRouter, HTTPException