feat(account): add close button and modify navigation for account pages

- Add close button to AppBar leading widget for better navigation experience
- Replace context.goNamed with context.pushNamed for followed items navigation
- Update SavedFiltersPage and SavedHeadlinesPage with close button

Author: fulleni

lib/account/view/manage_followed_items/manage_followed_items_page.dart

@@ -21,6 +21,12 @@ class ManageFollowedItemsPage extends StatelessWidget {
 
     return Scaffold(
       appBar: AppBar(
+        leading: IconButton(
+          icon: const Icon(Icons.close),
+          onPressed: () {
+            context.pop();
+          },
+        ),
         title: Text(
           l10n.accountContentPreferencesTile,
           style: textTheme.titleLarge,
@@ -37,7 +43,7 @@ class ManageFollowedItemsPage extends StatelessWidget {
             ),
             trailing: const Icon(Icons.chevron_right),
             onTap: () {
-              context.goNamed(Routes.followedTopicsListName);
+              context.pushNamed(Routes.followedTopicsListName);
             },
           ),
           const Divider(
@@ -52,7 +58,7 @@ class ManageFollowedItemsPage extends StatelessWidget {
             ),
             trailing: const Icon(Icons.chevron_right),
             onTap: () {
-              context.goNamed(Routes.followedSourcesListName);
+              context.pushNamed(Routes.followedSourcesListName);
             },
           ),
           const Divider(
@@ -70,7 +76,7 @@ class ManageFollowedItemsPage extends StatelessWidget {
             ),
             trailing: const Icon(Icons.chevron_right),
             onTap: () {
-              context.goNamed(Routes.followedCountriesListName);
+              context.pushNamed(Routes.followedCountriesListName);
             },
           ),
           const Divider(

lib/account/view/saved_filters_page.dart

@@ -25,6 +25,12 @@ class SavedFiltersPage extends StatelessWidget {
 
     return Scaffold(
       appBar: AppBar(
+        leading: IconButton(
+          icon: const Icon(Icons.close),
+          onPressed: () {
+            context.pop();
+          },
+        ),
         title: Text(
           // Use the correct localization key for the page title.
           l10n.savedFiltersPageTitle,

lib/account/view/saved_headlines_page.dart

@@ -28,6 +28,12 @@ class SavedHeadlinesPage extends StatelessWidget {
 
     return Scaffold(
       appBar: AppBar(
+        leading: IconButton(
+          icon: const Icon(Icons.close),
+          onPressed: () {
+            context.pop();
+          },
+        ),
         title: Text(
           l10n.accountSavedHeadlinesTile,
           style: textTheme.titleLarge,