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

services/emergency_service/main.py

@@ -349,6 +349,43 @@ async def health_check():
     return {"status": "healthy", "service": "emergency_service"}
 
 
+@app.get("/alerts")
+async def get_alerts_public(db: AsyncSession = Depends(get_db)):
+    """Get all emergency alerts (public endpoint for testing)"""
+    result = await db.execute(
+        select(EmergencyAlert)
+        .order_by(EmergencyAlert.created_at.desc())
+        .limit(50)
+    )
+    alerts = result.scalars().all()
+    return [EmergencyAlertResponse.model_validate(alert) for alert in alerts]
+
+
+@app.post("/alerts")
+async def create_alert_public(
+    alert_data: dict,
+    db: AsyncSession = Depends(get_db)
+):
+    """Create emergency alert (public endpoint for testing)"""
+    try:
+        new_alert = EmergencyAlert(
+            user_id=alert_data.get("user_id", 1),
+            alert_type=alert_data.get("alert_type", "medical"),
+            latitude=alert_data.get("latitude", 0),
+            longitude=alert_data.get("longitude", 0),
+            title=alert_data.get("title", "Emergency Alert"),
+            description=alert_data.get("description", ""),
+            is_resolved=False
+        )
+        db.add(new_alert)
+        await db.commit()
+        await db.refresh(new_alert)
+        return {"status": "success", "alert_id": new_alert.id}
+    except Exception as e:
+        await db.rollback()
+        return {"status": "error", "detail": str(e)}
+
+
 @app.websocket("/api/v1/emergency/ws/{user_id}")
 async def websocket_endpoint(websocket: WebSocket, user_id: str):
     """WebSocket endpoint for emergency notifications"""