feat: Fetch mind map in search page #2247 (#2292)

### What problem does this PR solve?
feat: Fetch mind map in search page #2247

### Type of change


- [x] New Feature (non-breaking change which adds functionality)

web/src/services/chat-service.ts

@@ -25,6 +25,7 @@ const {
   tts,
   ask,
   mindmap,
+  getRelatedQuestions,
 } = api;
 
 const methods = {
@@ -116,6 +117,10 @@ const methods = {
     url: mindmap,
     method: 'post',
   },
+  getRelatedQuestions: {
+    url: getRelatedQuestions,
+    method: 'post',
+  },
 } as const;
 
 const chatService = registerServer<keyof typeof methods>(methods, request);