大更新，架构调整，数据分析能力提升，

__init__.py

@@ -5,9 +5,20 @@ Data Analysis Agent Package
 一个基于LLM的智能数据分析代理，专门为Jupyter Notebook环境设计。
 """
 
-from .core.notebook_agent import NotebookAgent
-from .config.llm_config import LLMConfig
-from .utils.code_executor import CodeExecutor
+try:
+    from .core.notebook_agent import NotebookAgent
+except (ImportError, ModuleNotFoundError):
+    NotebookAgent = None
+
+try:
+    from .config.llm_config import LLMConfig
+except (ImportError, ModuleNotFoundError):
+    from config.llm_config import LLMConfig
+
+try:
+    from .utils.code_executor import CodeExecutor
+except (ImportError, ModuleNotFoundError):
+    from utils.code_executor import CodeExecutor
 
 __version__ = "1.0.0"
 __author__ = "Data Analysis Agent Team"