修正若干bug，后端基本完成

services/auth.py

@@ -14,9 +14,9 @@ def get_current_time() -> int:
     """获取当前UTC时间戳"""
     return int(time.time())
 
-def create_token(user_id: int, username: str, role: str, expire_delta: int) -> str:
+def create_token(user_id: int, username: str, role: str, expire_delta) -> str:
     """创建JWT token"""
-    expire = get_current_time() + expire_delta
+    expire = get_current_time() + int(expire_delta.total_seconds())
     to_encode = {
         "id": user_id,
         "username": username,

services/db.py

@@ -24,8 +24,7 @@ def get_db_engine() -> AsyncEngine:
         raise RuntimeError("Database engine not initialized")
     return _engine
 
-@asynccontextmanager
-async def get_db_session() -> AsyncGenerator[AsyncSession, None]:
+async def get_db_session() -> AsyncSession:
     """获取数据库会话"""
     async with AsyncSession(get_db_engine()) as session:
         try:
@@ -35,6 +34,16 @@ async def get_db_session() -> AsyncGenerator[AsyncSession, None]:
             await session.rollback()
             raise
 
+async def get_db_session_dep() -> AsyncSession:
+    """FastAPI依赖注入使用的数据库会话获取函数"""
+    async with AsyncSession(get_db_engine()) as session:
+        try:
+            yield session
+            await session.commit()
+        except Exception:
+            await session.rollback()
+            raise
+
 async def init_db(engine: AsyncEngine):
     """初始化数据库"""
     global _engine

services/user.py

@@ -30,7 +30,7 @@ async def get_user(session: AsyncSession, user_id: int) -> Optional[UserResponse
     return UserResponse.from_orm(user) if user else None
 
 
-async def get_users(session: AsyncSession, skip: int = 0, limit: int = 100) -> List[UserResponse]:
+async def get_users_list(session: AsyncSession, skip: int = 0, limit: int = 100) -> List[UserResponse]:
     """获取用户列表"""
     result = await session.execute(select(User).offset(skip).limit(limit))
     users = result.scalars().all()