Notification is added

lib/logic/session_timer.dart

@@ -5,6 +5,7 @@ import 'package:http/http.dart' as http;
 import 'package:paladinvpn/logic/app_config.dart';
 import 'package:paladinvpn/logic/vpn_connection.dart';
 import 'package:paladinvpn/logic/crypto_service.dart';
+import 'package:paladinvpn/components/notification.dart';
 
 /// SessionTimer acts as the client-side session authority for the VPN tunnel.
 /// 
@@ -51,6 +52,16 @@ class SessionTimer extends ChangeNotifier {
     return '${gb.toStringAsFixed(2)} GB';
   }
 
+  String get formattedDataUsed {
+    if (_usedBytes == 0) return '0.00 MB';
+    if (_usedBytes > 1024 * 1024 * 1024) {
+      final gb = _usedBytes / (1024 * 1024 * 1024);
+      return '${gb.toStringAsFixed(2)} GB';
+    }
+    final mb = _usedBytes / (1024 * 1024);
+    return '${mb.toStringAsFixed(2)} MB';
+  }
+
   double get progress {
     // Max duration is generally 60 or 90 minutes. We'll base the ring purely on data usage or just standard time
     // For UI simplicity, we'll return data progress:
@@ -119,6 +130,11 @@ class SessionTimer extends ChangeNotifier {
         }
         _lastUsedBytes = _usedBytes;
 
+        VpnNotificationManager.showOrUpdateStatus(
+          timeLeft: formatted,
+          speedKbps: '${_currentSpeedKbps.toStringAsFixed(2)} KB/s',
+        );
+
         notifyListeners();
       } else if (response.statusCode == 404) {
         // Peer not found on server (expired/deleted natively)
@@ -159,6 +175,7 @@ class SessionTimer extends ChangeNotifier {
     _timer = null;
     _remainingSeconds = 0;
     _currentSpeedKbps = 0.0;
+    VpnNotificationManager.cancel();
     notifyListeners();
   }