feat: Fix nutrition service and add location-based alerts

Changes:
- Fix nutrition service: add is_active column and Pydantic validation for UUID/datetime
- Add location-based alerts feature: users can now see alerts within 1km radius
- Fix CORS and response serialization in nutrition service
- Add getCurrentLocation() and loadAlertsNearby() functions
- Improve UI for nearby alerts display with distance and response count

shared/auth.py

@@ -4,7 +4,7 @@ This module provides common authentication functionality to avoid circular impor
 """
 
 import logging
-from datetime import datetime, timedelta
+from datetime import datetime, timedelta, timezone
 from typing import Optional
 
 import jwt
@@ -65,14 +65,18 @@ def create_access_token(data: dict, expires_delta: Optional[timedelta] = None) -
     """Create access token."""
     to_encode = data.copy()
     if expires_delta:
-        expire = datetime.utcnow() + expires_delta
+        expire = datetime.now(timezone.utc) + expires_delta
     else:
-        expire = datetime.utcnow() + timedelta(minutes=15)
+        expire = datetime.now(timezone.utc) + timedelta(minutes=15)
     to_encode.update({"exp": expire})
-    encoded_jwt = jwt.encode(
-        to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM
-    )
-    return encoded_jwt
+    try:
+        encoded_jwt = jwt.encode(
+            to_encode, settings.SECRET_KEY, algorithm=settings.ALGORITHM
+        )
+        return encoded_jwt
+    except Exception as e:
+        logging.error(f"Error encoding JWT: {e}, data: {data}, expire: {expire}")
+        raise
 
 
 def verify_token(token: str) -> Optional[dict]:
@@ -85,7 +89,8 @@ def verify_token(token: str) -> Optional[dict]:
         if user_id is None:
             return None
         return {"user_id": int(user_id), "email": payload.get("email")}
-    except InvalidTokenError:
+    except InvalidTokenError as e:
+        logging.error(f"Token validation error: {e}")
         return None