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- 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>