Sub-ticket of MARS-365 soporte/actions.ts: (1) close+notify race can double-email a user — make close conditional UPDATE…RETURNING, email only the transitioned row; (2) support update returns ok when zero ticket rows updated — treat empty RETURNING as not-found. Codex audit, Elazar-greenlit 2026-06-30. Investigate-then-fix; audit cross-review (notify/email path). · mars