8. SMTP: emailService.js (nodemailer), templates (welcome/payment/low_credits)
/api/admin/email/test — тест отправки
app_settings category=smtp (HOST/PORT/USER/PASS/FROM/ENABLED)
9. Maintenance mode: middleware в index.js, MAINTENANCE_MODE в engine settings
При true → 503 для всех запросов кроме /uploads и /api/settings
10. Blog topic bank:
DB: blog_topics(category,topic,is_used,source,priority)
40 тем мигрированы из хардкода (source=hardcoded)
autogen.js: getNextTopic берёт из DB, fallback на TOPIC_BANK
admin API: GET/POST /blog-topics, DELETE /:id, POST /generate (AI +10)
Ник (Claude)