Feat: Displays the embedded page of the chat module #3221 (#9532)

### What problem does this PR solve?

Feat: Displays the embedded page of the chat module #3221
Feat: Let the agen operator support the selection of tts model #3221

### Type of change


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

web/src/services/next-chat-service.ts

@@ -28,6 +28,7 @@ const {
   getRelatedQuestions,
   listNextDialog,
   upload_and_parse,
+  fetchExternalChatInfo,
 } = api;
 
 const methods = {
@@ -131,6 +132,10 @@ const methods = {
     method: 'post',
     url: upload_and_parse,
   },
+  fetchExternalChatInfo: {
+    url: fetchExternalChatInfo,
+    method: 'get',
+  },
 } as const;
 
 const chatService = registerNextServer<keyof typeof methods>(methods);