增加渲染节点功能，优化工具操作和样式

src/store/chatToolStore.ts

@@ -34,6 +34,12 @@ export type ChatToolAction =
       series?: Array<{ name: string; data: number[]; type?: "line" | "bar" }>;
       xAxisName?: string;
       yAxisName?: string;
+    }
+  | {
+      type: "render_junctions";
+      nodeAreaMap: Record<string, string>;
+      areaIds?: string[];
+      areaColors?: Record<string, string>;
     };
 
 interface ChatToolState {