Fix test files to use correct package name and app class

- Update widget_test.dart: fuego_wallet -> xfg_wallet, FuegoWalletApp -> XFGWalletApp
- Update rpc_service_test.dart: fuego_wallet -> xfg_wallet
- Fix expected default node from 'node1.usexfg.org' to '207.244.247.64:18180'
- Fix expected default port from 28280 to 18180
- Update test descriptions to reflect XF₲ Wallet branding

Author: ColinRitman

test/rpc_service_test.dart

@@ -1,14 +1,14 @@
 // Unit tests for FuegoRPCService
 
 import 'package:flutter_test/flutter_test.dart';
-import 'package:fuego_wallet/services/fuego_rpc_service.dart';
+import 'package:xfg_wallet/services/fuego_rpc_service.dart';
 
 void main() {
   group('FuegoRPCService', () {
     test('should initialize with default remote node', () {
       final service = FuegoRPCService();
       expect(service.defaultRemoteNodes.isNotEmpty, true);
-      expect(service.defaultRemoteNodes.first, 'node1.usexfg.org');
+      expect(service.defaultRemoteNodes.first, '207.244.247.64:18180');
     });
 
     test('should update node correctly', () {
@@ -23,7 +23,7 @@ void main() {
     test('should use default port when not specified', () {
       final service = FuegoRPCService();
       service.updateNode('test-node.com');
-      expect(service.currentNodeUrl, 'http://testnetnode.com:28280');
+      expect(service.currentNodeUrl, 'http://test-node.com:18180');
     });
   });
 }

test/widget_test.dart

@@ -1,17 +1,17 @@
-// Basic Flutter widget test for Fuego Wallet
+// Basic Flutter widget test for XF₲ Wallet
 
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
-import 'package:fuego_wallet/main.dart';
+import 'package:xfg_wallet/main.dart';
 
 void main() {
-  testWidgets('Fuego Wallet app smoke test', (WidgetTester tester) async {
+  testWidgets('XF₲ Wallet app smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
-    await tester.pumpWidget(const FuegoWalletApp());
+    await tester.pumpWidget(const XFGWalletApp());
 
     // Verify that our app starts with the splash screen
-    expect(find.text('FUEGO WALLET'), findsOneWidget);
+    expect(find.text('XF₲ WALLET'), findsOneWidget);
     expect(find.text('Privacy-Focused Cryptocurrency'), findsOneWidget);
   });
 }