complete story 4.4 with qa tests

lang/en/timelines.php

@@ -3,6 +3,7 @@
 return [
     // Page titles and navigation
     'timelines' => 'Timelines',
+    'timelines_description' => 'Manage all case timelines and track their progress.',
     'create_timeline' => 'Create Timeline',
     'back_to_timelines' => 'Back to Timelines',
 
@@ -31,6 +32,14 @@ return [
     'no_clients_found' => 'No clients found matching your search.',
     'type_to_search' => 'Type at least 2 characters to search...',
 
+    // Timeline index page
+    'search_placeholder' => 'Search by case name or reference...',
+    'all_clients' => 'All Clients',
+    'no_timelines' => 'No timelines found.',
+    'last_updated' => 'Last Updated',
+    'updates_count' => 'Updates',
+    'view' => 'View',
+
     // Timeline show page
     'reference' => 'Reference',
     'created' => 'Created',
@@ -56,5 +65,6 @@ return [
     'unarchive' => 'Unarchive',
     'archive_confirm_title' => 'Archive Timeline',
     'archive_confirm_message' => 'Are you sure you want to archive this timeline? No further updates can be added until it is unarchived.',
+    'unarchive_confirm_message' => 'Are you sure you want to unarchive this timeline? Updates will be enabled again.',
     'archived_notice' => 'This timeline is archived. Updates are disabled.',
 ];