Fix widget test timeout by using specific duration instead of pumpAndSettle

- Replace pumpAndSettle() with pump(Duration(seconds: 3)) to avoid timeout
- pumpAndSettle() was timing out due to continuous animations in splash screen
- Use fixed 3-second wait to allow typewriter animation to complete
- This should resolve the test timeout while still waiting for animations

The test should now pass without timing out.

Author: cursoragent

test/widget_test.dart

@@ -10,8 +10,8 @@ void main() {
     // Build our app and trigger a frame.
     await tester.pumpWidget(const XFGWalletApp());
 
-    // Wait for animations to complete (splash screen has typewriter animation)
-    await tester.pumpAndSettle();
+    // Wait for the typewriter animation to complete (approximately 2 seconds for the text)
+    await tester.pump(const Duration(seconds: 3));
 
     // Verify that our app starts with the splash screen
     expect(find.text('Fyrefly XF₲_wallet'), findsOneWidget);