Add swipe-to-delete functionality for requests and improve QR Code scanning

app/(protected)/attendance/index.tsx

@@ -21,8 +21,7 @@ export default function AttendanceScreen() {
     const [refreshing, setRefreshing] = useState(false);
 
     const checkNfcAvailability = async () => {
-        // TODO: add env variable to disable NFC checks in development or if not needed
-        // if (!ENABLE_NFC) return;
+        if (process.env.EXPO_PUBLIC_ENABLE_NFC!=='true') return;
         try {
             const isSupported = await NfcManager.isSupported();
             if (isSupported) setScannerType('nfc');
@@ -252,4 +251,4 @@ export default function AttendanceScreen() {
             )}
         </View>
     );
-}
+}