fix(sessions): keep fresh chats during auto tidy (#1871)

Co-authored-by: Alexandre Teixeira <111787685+alteixeira20@users.noreply.github.com>

routes/session_routes.py

@@ -10,8 +10,9 @@ import logging
 from core.session_manager import SessionManager
 from core.models import ChatMessage
 from src.request_models import SessionResponse
-from core.database import Session as DbSession, SessionLocal, Document, GalleryImage
+from core.database import Session as DbSession, SessionLocal, Document, GalleryImage, utcnow_naive
 from src.auth_helpers import get_current_user, effective_user, _auth_disabled
+from src.session_actions import is_session_recently_active
 
 
 def _sanitize_export_filename(name: str) -> str:
@@ -1028,6 +1029,7 @@ def setup_session_routes(session_manager: SessionManager, config: dict, webhook_
                 db.query(DbMsg.session_id, _sa_func.count(DbMsg.id))
                 .filter(DbMsg.role == "assistant").group_by(DbMsg.session_id).all()
             )
+            cleanup_now = utcnow_naive()
             for row in rows:
                 # Never delete important sessions
                 if getattr(row, 'is_important', False):
@@ -1040,6 +1042,8 @@ def setup_session_routes(session_manager: SessionManager, config: dict, webhook_
                     if hasattr(session_manager, 'delete_session'):
                         session_manager.delete_session(row.id)
                     continue
+                if is_session_recently_active(row, now=cleanup_now):
+                    continue
                 msg_count = _counts.get(row.id, 0)
                 should_delete = False
                 if msg_count == 0: