fix: 修复Mermaid架构图语法错误

README.md

@@ -90,20 +90,20 @@ graph TB
 
     LangGraph -->|节点1| RetrieveMemory[记忆检索]
     LangGraph -->|节点2| MemoryTrigger[记忆触发]
-    LangGraph -->|节点3| LLMCall[LLM 调用 (React 模式)]
+    LangGraph -->|节点3| LLMCall[LLM调用 React模式]
     LangGraph -->|节点4| ToolNode[工具执行]
     LangGraph -->|节点5| Summarize[记忆摘要]
     LangGraph -->|节点6| Finalize[最终处理]
 
     ToolNode -->|调用| Tools[工具集合]
     Tools -->|RAG| RAGTool[知识库检索]
-    Tools -->|子图| SubgraphTools[子图工具<br>通讯录/词典/资讯]
+    Tools -->|子图| SubgraphTools[子图工具: 通讯录/词典/资讯]
 
-    RAGTool -->|检索| Qdrant[(Qdrant 向量库)]
+    RAGTool -->|检索| Qdrant[Qdrant向量库]
     RAGTool -->|重排序| RerankService[rerank_services]
     RAGTool -->|嵌入| EmbeddingService[embedding_services]
 
-    RetrieveMemory -->|存储| PostgreSQL[(PostgreSQL)]
+    RetrieveMemory -->|存储| PostgreSQL[PostgreSQL]
     Summarize -->|存储| PostgreSQL
 
     SubgraphAPI -->|路由| Subgraphs[子图系统 subgraphs]
@@ -111,14 +111,14 @@ graph TB
     Subgraphs --> Dictionary[词典子图]
     Subgraphs --> NewsAnalysis[资讯分析子图]
     Subgraphs --> Core[核心工具 core/]
-    Core --> Intent[意图理解 (React)]
+    Core --> Intent[意图理解 React]
     Core --> HumanReview[人工审核]
     Core --> Formatter[格式化输出]
     Core --> StateBase[状态基类]
 
-    Contact -->|数据库| ContactDB[(PostgreSQL 联系人)]
-    Dictionary -->|数据库| DictionaryDB[(PostgreSQL 生词本)]
-    NewsAnalysis -->|检索| NewsQdrant[(Qdrant 向量检索)]
+    Contact -->|数据库| ContactDB[PostgreSQL联系人]
+    Dictionary -->|数据库| DictionaryDB[PostgreSQL生词本]
+    NewsAnalysis -->|检索| NewsQdrant[Qdrant向量检索]
 
     style User fill:#e1f5ff
     style Frontend fill:#fff4e1