Release v1.0.1

[SiteRelEnby]

Added

• Support page. A new Support entry in the sidebar with two sections. The top is an operator contact card populated from optional env vars (SUPPORT_EMAIL, SUPPORT_URL, SUPPORT_NOTE, STATUS_URL), surfaced read-only via GET /v1/auth/config the same way the legal-footer links are; it hides entirely when none are set, so a bare self-host shows nothing there. The bottom is static and identical on every instance: links to the project's GitHub issue tracker for bug reports and to the security policy + security@sheaf.sh for private vulnerability disclosure. The status-page link is operator-set rather than static, since a self-hosted instance's status page is the operator's own.
• SMTP2GO delivery webhook. A new POST /v1/webhooks/smtp2go/events endpoint feeds SMTP2GO's delivery/bounce/spam events into the same deliverability lifecycle as the SES and SendGrid handlers, so bounce suppression and soft-bounce self-healing work when sending via SMTP2GO (over the smtp backend). delivered clears transient soft-bounce state, bounce maps hard/soft from SMTP2GO's classification (an unclassified bounce defaults to soft, the conservative choice), and spam is treated as a complaint. SMTP2GO does not sign payloads, so the endpoint is guarded by a shared secret in the URL (SMTP2GO_WEBHOOK_SECRET; returns 404 when unset) - point the SMTP2GO webhook at /v1/webhooks/smtp2go/events?token= (JSON or form-encoded output both accepted) and enable at least the Delivered, Bounce, and Spam events. See SELFHOSTING for setup.