refac: modernize imports, standardize type hints and docstrings

backend/open_webui/retrieval/web/main.py

@@ -1,13 +1,11 @@
-import validators
+from __future__ import annotations
 
-from typing import Optional
 from urllib.parse import urlparse
 
-from pydantic import BaseModel
-
+import validators
 from open_webui.retrieval.web.utils import resolve_hostname
 from open_webui.utils.misc import is_string_allowed
-
+from pydantic import BaseModel
 
 def get_filtered_results(results, filter_list):
     if not filter_list:
@@ -39,8 +37,7 @@ def get_filtered_results(results, filter_list):
 
     return filtered_results
 
-
 class SearchResult(BaseModel):
     link: str
-    title: Optional[str]
-    snippet: Optional[str]
+    title: str | None
+    snippet: str | None