Remove notification system and fix data refresh issues

- Removed NotificationPanel component and related files
- Removed notifications API endpoint and utils
- Fixed data refresh functionality with cache-busting
- Added refreshing state with better UI feedback
- Added no-cache headers to API endpoint
- Improved refresh button with loading state

app/components/LibraryList.tsx

@@ -1,7 +1,7 @@
 'use client';
 
 import { useState, useEffect } from 'react';
-import { calculateDistance, getCurrentLocation, getCoordinatesFromZip, isValidSanDiegoZip } from '../utils/notifications';
+import { calculateDistance, getCurrentLocation, getCoordinatesFromZip, isValidSanDiegoZip } from '../utils/location';
 
 interface LocationData {
   name: string;