Completely refactor the LLM integration method to easily replace the LLM used by each module and optimize the retransmission mechanism.

ReportEngine/nodes/base_node.py

@@ -6,14 +6,14 @@ Report Engine节点基类
 import logging
 from abc import ABC, abstractmethod
 from typing import Any, Dict, Optional
-from ..llms.base import BaseLLM
+from ..llms.base import LLMClient
 from ..state.state import ReportState
 
 
 class BaseNode(ABC):
     """节点基类"""
     
-    def __init__(self, llm_client: BaseLLM, node_name: str = ""):
+    def __init__(self, llm_client: LLMClient, node_name: str = ""):
         """
         初始化节点
         

ReportEngine/nodes/html_generation_node.py

@@ -8,7 +8,7 @@ from datetime import datetime
 from typing import Dict, Any
 
 from .base_node import StateMutationNode
-from ..llms.base import BaseLLM
+from ..llms.base import LLMClient
 from ..state.state import ReportState
 from ..prompts import SYSTEM_PROMPT_HTML_GENERATION
 # 不再需要text_processing依赖
@@ -17,7 +17,7 @@ from ..prompts import SYSTEM_PROMPT_HTML_GENERATION
 class HTMLGenerationNode(StateMutationNode):
     """HTML生成处理节点"""
     
-    def __init__(self, llm_client: BaseLLM):
+    def __init__(self, llm_client: LLMClient):
         """
         初始化HTML生成节点