fix search results sorting

shared/models/main.py

@@ -789,7 +789,9 @@ class MainSearchPageMixin(
             # Put results without a timestamp first, as they'll be person litsings etc.
             key=lambda result: result.timestamp
             if hasattr(result, "timestamp")
-            else datetime.date(year=9999, month=1, day=1),
+            else datetime.datetime(year=9999, month=1, day=1).replace(
+                tzinfo=datetime.timezone.utc
+            ),
             reverse=True,
         )