feat(07-03): SettingsModule — SMTP config backend + connection test (DKV-05)
- SmtpConfigDto: host/port/encryption/username/password/fromAddress with class-validator
- SettingsService: getSmtpConfig (SMTP_SAFE_SELECT, no password), saveSmtpConfig (AES-256-GCM
encryption via CalendarCryptoService, preserve existing password on empty), getDecryptedSmtpConfig
(internal, used by DkvMailService), testSmtpConfig (nodemailer.verify(), returns boolean, T-07-16),
getStartupSmtpConfig (tenant-agnostic, used by MailModule factory, D-06)
- SettingsController: GET/PUT /settings/smtp + POST /settings/smtp/test, all @Roles(ADMIN, SUPER_ADMIN)
- SettingsModule: imports CalendarModule, exports SettingsService
- AppModule: imports SettingsModule
schalli
1bec0e76ee