feat(chat): join users to rooms on sign-in

apps/edr-freight-web/backoffice/src/features/chat/useChatSso.ts

@@ -1,19 +0,0 @@
-import { useQuery } from "@tanstack/react-query";
-
-import { chatApi } from "./chatApi";
-
-export const CHAT_SSO_KEY = ["chat", "sso"] as const;
-
-/**
- * The login_token this resolves to is single-use and expires in 5 minutes
- * (Synapse default) — the global `staleTime: 0` (queryClient.ts) already
- * means every fresh mount of the launch page refetches rather than reusing
- * a possibly-spent link.
- */
-export function useChatSso() {
-  return useQuery({
-    queryKey: CHAT_SSO_KEY,
-    queryFn: chatApi.getSsoUrl,
-    retry: false,
-  });
-}