council(execute): FrontendDev - Round 4: export button fix + mark Phase 2 complete
- Fix P1 bug: ticket/list.html export button (GET→POST form) matching IS_AJAX_POST
- Mark all plan.md tasks complete (seat templates, tickets, verifiers, verifications views)
- BackendArchitect: AuditService.php (S4 design), Verifier.php CONCAT fix, Verification.php column() fix
- BackendArchitect: SeatTemplate.php countSeats fix, TicketService.php transaction fix
- BackendArchitect: EventListener.php audit_log table added
- SecurityEngineer: S1-S5 security audit complete
- [CONSENSUS: YES] all three agents vote YES
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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