导入方式修改

backend/app/main_graph/tools/common_tools.py

@@ -20,7 +20,7 @@ def web_search_tool(query: str, max_results: int = 5) -> str:
         格式化的搜索结果，包含引用溯源
     """
     try:
-        from app.core import web_search
+        from backend.app.core import web_search
         return web_search(query, max_results)
     except Exception as e:
         return f"联网搜索出错：{str(e)}"
@@ -40,7 +40,7 @@ def generate_chart_tool(data_text: str, chart_type: str = "bar") -> str:
         格式化的图表输出（Mermaid 格式）
     """
     try:
-        from app.core import generate_chart
+        from backend.app.core import generate_chart
         return generate_chart(data_text, chart_type)
     except Exception as e:
         return f"生成图表出错：{str(e)}\n\n请使用格式：标题,标签1:值1,标签2:值2,..."