refac: modernize type annotations (PEP 604 / PEP 585)

backend/open_webui/routers/terminals.py

@@ -12,14 +12,13 @@ from urllib.parse import unquote
 import aiohttp
 from fastapi import APIRouter, Depends, Request, Response, WebSocket
 from fastapi.responses import JSONResponse, StreamingResponse
-from starlette.background import BackgroundTask
-
-from open_webui.utils.auth import get_verified_user
-from open_webui.utils.access_control import has_connection_access
-from open_webui.env import AIOHTTP_CLIENT_SESSION_SSL
 from open_webui.config import TERMINAL_PROXY_HEADERS
+from open_webui.env import AIOHTTP_CLIENT_SESSION_SSL
 from open_webui.models.groups import Groups
 from open_webui.models.users import Users
+from open_webui.utils.access_control import has_connection_access
+from open_webui.utils.auth import get_verified_user
+from starlette.background import BackgroundTask
 
 log = logging.getLogger(__name__)
 
@@ -199,6 +198,7 @@ async def _resolve_authenticated_connection(ws: WebSocket, server_id: str):
     """
     import asyncio
     import json
+
     from open_webui.utils.auth import decode_token
 
     # First-message authentication