fix(email): replace nodemailer SMTP with Brevo HTTP API#6
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SMTP connections to port 587 are blocked on Render. Switch to Brevo transactional API over HTTPS instead. Remove nodemailer dependency. Test env keeps an in-memory capture without any transport.
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Problem
SMTP connections on port 587 time out on Render - the hosting provider
blocks outbound SMTP traffic, so nodemailer never reaches any relay server.
Solution
Replace the SMTP transport with Brevo's transactional email API, which
runs over HTTPS (port 443). No SMTP credentials needed.
Changes
emailService.ts: remove nodemailer, send viafetchto Brevo APIpackage.json: removenodemailerand@types/nodemailer.env.example: replaceSMTP_*vars withBREVO_API_KEYandEMAIL_FROM