抽象统一定位方法，支持多种地理要素

src/components/chat/chatMessageSections.test.ts

@@ -56,11 +56,11 @@ describe("parseContentWithToolCalls", () => {
 
   it("parses a complete tool_call block", () => {
     const content =
-      '分析完成。\n<tool_call>{"tool":"locate_nodes","params":{"ids":["J1","J2"]}}</tool_call>\n以上是结果。';
+      '分析完成。\n<tool_call>{"tool":"locate_junctions","params":{"ids":["J1","J2"]}}</tool_call>\n以上是结果。';
     const result = parseContentWithToolCalls(content);
 
     expect(result.toolCalls).toHaveLength(1);
-    expect(result.toolCalls[0].tool).toBe("locate_nodes");
+    expect(result.toolCalls[0].tool).toBe("locate_junctions");
     expect(result.toolCalls[0].params).toEqual({ ids: ["J1", "J2"] });
 
     expect(result.segments).toHaveLength(3);
@@ -70,7 +70,7 @@ describe("parseContentWithToolCalls", () => {
     });
     expect(result.segments[1]).toMatchObject({
       type: "tool_call",
-      toolCall: { tool: "locate_nodes" },
+      toolCall: { tool: "locate_junctions" },
     });
     expect(result.segments[2]).toEqual({
       type: "text",