Replace the old timeline dialog with a Bootstrap 5 modal (with HTMX support and jQuery fallback) and move AJAX content into the modal body. Add initTimelineDetailsTable to initialize/destroy DataTables for detail views and guard DataTable initialization when tables are absent. Revamp the timeline index: convert filters into a Bootstrap card with improved form layout, add Reset button, show a summary badge/count and a DXCC info alert for DXCC award, and embed the details modal markup. Convert timeline tables to responsive containers, use semantic <th> headers, and replace text links with accessible buttons that call displayTimelineContacts. Minor UI tweaks: change empty-result alert to warning and add a CSS class (menuOnResultTab) to the dropdown-menu in log_ajax for result-row actions.
