fix: Add TestWidgetsFlutterBinding.ensureInitialized() to tests

Fixes test failures caused by path_provider requiring Flutter bindings
to be initialized before use.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: cfsmp3

test/bloc_test.dart

@@ -6,6 +6,8 @@ import 'package:ccxgui/models/settings_model.dart';
 import 'package:ccxgui/repositories/settings_repository.dart';
 
 void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
   group('CounterBloc', () {
     SettingsRepository _settingsRepository = SettingsRepository();
     SettingsModel settingsModel = SettingsModel();