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

ws_test_final_results.txt

@@ -0,0 +1,22 @@
+
+🔐 Step 1: Getting JWT token...
+Status: 200
+✅ Token obtained: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiI1M...
+✅ User ID: 51
+
+📡 Step 2: Testing WebSocket connection...
+✅ WebSocket connected!
+📨 Received: {"type": "connection_established", "message": "WebSocket connection established successfully", "user_id": 51, "timestamp": "2025-12-13T14:15:14.982894"}
+
+🏓 Step 3: Testing ping/pong...
+📤 Ping sent
+📨 Received: {"type": "connection_established", "message": "Connected to emergency notifications", "user_id": 51}
+
+👂 Step 4: Listening for broadcasts (10 seconds)...
+(Leave this running and create an emergency alert in another terminal)
+📨 Broadcast received: {
+  "type": "pong"
+}
+⏱️  No broadcasts received (timeout)
+
+✅ WebSocket connection test completed successfully!