- Remove all onerror="this.style.display='none'" from avatar imgs in
layout_header.php, DashboardView.php, and TicketView.php (PHP + JS)
- Replace onclick SLA dismiss with data-action="dismiss-priority-banner"
attribute; handler wired via existing click delegation in TicketView.php
- Global capture-phase error delegation in layout_footer.php handles all
avatar image failures by adding .lt-avatar-img-err class (CSS display:none)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>