add MoviePilot AI agent implementation and workflow manager

app/chain/message.py

@@ -847,7 +847,7 @@ class MessageChain(ChainBase):
 
             # 异步处理AI智能体请求
             import asyncio
-            from app.agent.agent import agent_manager
+            from app.agent import agent_manager
             
             # 生成会话ID
             session_id = f"user_{userid}_{hash(user_message) % 10000}"

app/chain/workflow.py

@@ -11,7 +11,7 @@ from pydantic.fields import Callable
 from app.chain import ChainBase
 from app.core.config import global_vars
 from app.core.event import Event, eventmanager
-from app.core.workflow import WorkFlowManager
+from app.workflow import WorkFlowManager
 from app.db.models import Workflow
 from app.db.workflow_oper import WorkflowOper
 from app.log import logger