fix chat messages

src/app/services/http.service.ts

@@ -1,4 +1,4 @@
-import { HttpClient, HttpErrorResponse } from '@angular/common/http';
+import { HttpClient, HttpErrorResponse, HttpResponse } from '@angular/common/http';
 import { Injectable } from '@angular/core';
 import { ok, err, Result } from 'neverthrow';
 
@@ -53,3 +53,10 @@ export class HttpService {
     }
   }
 }
+
+
+
+export function isHttpResponse(data: any): data is HttpResponse<any> {
+  return typeof data.status == 'number';
+}
+