New Database

backend/calendar_mgr.py

@@ -4,10 +4,7 @@ Every function is scoped to an explicit `user_id` so each user only ever
 sees/mutates their own data (defense in depth: rows are filtered by user_id
 even though they also join user-scoped groups/sources).
 """
-import os
-import hashlib
-import tempfile
-from datetime import datetime, timedelta, date
+from datetime import datetime, timedelta
 from backend.time_util import now as tz_now
 from flask import current_app
 from backend.models import get_db