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- TicketController::create: validate csrf_token from POST before processing - CreateTicketView: emit hidden csrf_token field; replace innerHTML duplicate list with DOM methods to prevent any XSS path; guard checkDuplicates() with lt.api availability check - index.php audit-log: allowlist action_type; validate date_from/date_to as YYYY-MM-DD before passing to query Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>