feat(account): add entry point for saved filters management

Adds a new "Saved Filters" ListTile to the AccountPage. This serves as the new, centralized entry point for users to access the page where they can manage (reorder, rename, delete) their saved headline filters.

Author: fulleni

lib/account/view/account_page.dart

@@ -72,6 +72,26 @@ class AccountPage extends StatelessWidget {
             indent: AppSpacing.paddingMedium,
             endIndent: AppSpacing.paddingMedium,
           ),
+          ListTile(
+            leading: Icon(
+              Icons.filter_list_alt,
+              color: theme.colorScheme.primary,
+            ),
+            // This will be updated to use l10n.accountSavedFiltersTile later.
+            title: Text(
+              'Saved Filters',
+              style: textTheme.titleMedium,
+            ),
+            trailing: const Icon(Icons.chevron_right),
+            onTap: () {
+              // This will be updated to use Routes.accountSavedFiltersName later.
+              context.goNamed('accountSavedFilters');
+            },
+          ),
+          const Divider(
+            indent: AppSpacing.paddingMedium,
+            endIndent: AppSpacing.paddingMedium,
+          ),
           _buildSettingsTile(context),
           const Divider(
             indent: AppSpacing.paddingMedium,