refactor(router): use named routes for entity details

- Replace direct navigation to entity details pages with a single named route
- Use path parameters to specify entity type and ID
- Remove unnecessary imports of EntityDetailsPage
- Update navigation in followed items pages (countries, sources, topics)

Author: fulleni

lib/account/view/manage_followed_items/countries/followed_countries_list_page.dart

@@ -2,7 +2,6 @@ import 'package:core/core.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/account/bloc/account_bloc.dart';
-import 'package:flutter_news_app_mobile_client_full_source_code/entity_details/view/entity_details_page.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/l10n/l10n.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/router/routes.dart';
 import 'package:go_router/go_router.dart';
@@ -97,12 +96,12 @@ class FollowedCountriesListPage extends StatelessWidget {
                   },
                 ),
                 onTap: () {
-                  context.push(
-                    Routes.countryDetails,
-                    extra: EntityDetailsPageArguments(
-                      entityId: country.id,
-                      contentType: ContentType.country,
-                    ),
+                  context.pushNamed(
+                    Routes.entityDetailsName,
+                    pathParameters: {
+                      'type': ContentType.country.name, // 'topic'
+                      'id': country.id,
+                    },
                   );
                 },
               );

lib/account/view/manage_followed_items/sources/followed_sources_list_page.dart

@@ -2,7 +2,6 @@ import 'package:core/core.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/account/bloc/account_bloc.dart';
-import 'package:flutter_news_app_mobile_client_full_source_code/entity_details/view/entity_details_page.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/l10n/l10n.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/router/routes.dart';
 import 'package:go_router/go_router.dart';
@@ -94,12 +93,12 @@ class FollowedSourcesListPage extends StatelessWidget {
                   },
                 ),
                 onTap: () {
-                  context.push(
-                    Routes.sourceDetails,
-                    extra: EntityDetailsPageArguments(
-                      entityId: source.id,
-                      contentType: ContentType.source,
-                    ),
+                  context.pushNamed(
+                    Routes.entityDetailsName,
+                    pathParameters: {
+                      'type': ContentType.source.name,
+                      'id': source.id,
+                    },
                   );
                 },
               );

lib/account/view/manage_followed_items/topics/followed_topics_list_page.dart

@@ -2,7 +2,6 @@ import 'package:core/core.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/account/bloc/account_bloc.dart';
-import 'package:flutter_news_app_mobile_client_full_source_code/entity_details/view/entity_details_page.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/l10n/l10n.dart';
 import 'package:flutter_news_app_mobile_client_full_source_code/router/routes.dart';
 import 'package:go_router/go_router.dart';
@@ -102,12 +101,12 @@ class FollowedTopicsListPage extends StatelessWidget {
                   },
                 ),
                 onTap: () {
-                  context.push(
-                    Routes.topicDetails,
-                    extra: EntityDetailsPageArguments(
-                      entityId: topic.id,
-                      contentType: ContentType.topic,
-                    ),
+                  context.pushNamed(
+                    Routes.entityDetailsName,
+                    pathParameters: {
+                      'type': ContentType.topic.name,
+                      'id': topic.id,
+                    },
                   );
                 },
               );