refactor: 重构目录结构 - 简化层级

backend/app/main_graph/tools/graph_tools.py

@@ -0,0 +1,17 @@
+"""
+工具定义模块 - 子图工具 + RAG 工具
+Subgraph Tools + RAG Tools
+"""
+
+# 子图工具
+from .subgraph_tools import (
+    SUBGRAPH_TOOLS,
+    SUBGRAPH_TOOLS_BY_NAME,
+    dictionary_tool,
+    news_analysis_tool,
+    contact_tool
+)
+
+# 工具列表和映射（全局常量）
+AVAILABLE_TOOLS = SUBGRAPH_TOOLS.copy()
+TOOLS_BY_NAME = SUBGRAPH_TOOLS_BY_NAME.copy()