refactor(router): remove unused localization and snackbar redirect

- Remove unused localization import and unused l10n variable
- Remove snackbar display for unauthorized access redirect
- Add print statement for unauthorized access attempt
- Update redirect comment to explain safe redirect logic

Author: fulleni

lib/router/router.dart

@@ -25,7 +25,6 @@ import 'package:flutter_news_app_web_dashboard_full_source_code/content_manageme
 import 'package:flutter_news_app_web_dashboard_full_source_code/content_management/view/edit_topic_page.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/content_management/widgets/filter_dialog/bloc/filter_dialog_bloc.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/content_management/widgets/filter_dialog/filter_dialog.dart';
-import 'package:flutter_news_app_web_dashboard_full_source_code/l10n/l10n.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/local_ads_management/bloc/filter_local_ads/filter_local_ads_bloc.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/local_ads_management/view/create_local_banner_ad_page.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/local_ads_management/view/create_local_interstitial_ad_page.dart';
@@ -66,7 +65,6 @@ GoRouter createRouter({
     // --- Redirect Logic ---
     redirect: (BuildContext context, GoRouterState state) {
       final appStatus = context.read<AppBloc>().state.status;
-      final l10n = AppLocalizationsX(context).l10n;
       final currentLocation = state.matchedLocation;
 
       print(
@@ -116,10 +114,12 @@ GoRouter createRouter({
 
         // Universally allowed routes like 'settings' are exempt from this check.
         if (!isAuthorized && destinationRouteName != Routes.settingsName) {
-          ScaffoldMessenger.of(context).showSnackBar(
-            SnackBar(content: Text(l10n.unauthorizedAccessRedirect)),
+          print(
+            '    Action: Unauthorized access to "$destinationRouteName". '
+            'Redirecting to $overviewPath.',
           );
-          // Redirect unauthorized users to the overview page.
+          // Redirect unauthorized users to the overview page. This is a safe
+          // redirect without side effects.
           return Routes.overview;
         }
         // --- End of RBAC ---