Fix: add future annotations to all files, fix date field name shadowing type in RewardRedeemRequest

backend/app/services/food_lookup.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 """Open Food Facts API client for barcode scanning and food search."""
 import httpx
 from app.schemas.food import FoodSearchResult

backend/app/services/points_engine.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 """Points calculation engine — the heart of the reward system."""
 import uuid
 from datetime import date, timedelta

backend/app/services/polar_sync.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 """Polar AccessLink API client for activity sync."""
 import uuid
 from datetime import datetime, timezone

backend/app/services/resource_matcher.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 """Resource recommendation engine — matches external programs to user profiles."""
 import uuid
 from sqlalchemy import select

backend/app/services/strava_sync.py

@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 """Strava API client for activity sync."""
 import uuid
 from datetime import datetime, timezone