Prevents UI re-trigger while email is in flight. Status flow: S (scheduled) → P (processing) → D (delivered) / S (failed, retryable) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Prevents UI re-trigger while email is in flight. Status flow: S (scheduled) → P (processing) → D (delivered) / S (failed, retryable) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>