aabde17532
Phase 4 implementation: - 4.1 IONOS SMTP email configuration (production + docker profiles) - 4.2 Portal navigation update (info board, events, forum links) - 4.3 Tier enforcement: PlanTierService (forum=Pro+, info board limits) - 4.4 WebSocket real-time updates (WebSocketEventPublisher) - 4.5 EmailService: notification, event reminder, info board templates + rate limiting - 4.6 Enterprise custom FROM: CustomMailDomain entity, DNS verification, controller New files: - PlanTierService: tier checks for forum/info board/enterprise features - NotificationDispatchService: EMAIL channel dispatch via preferences - WebSocketEventPublisher: STOMP topic push for forum/info board/events - CustomMailDomainService: DNS TXT record verification for custom FROM - MailSettingsController: Enterprise custom domain API endpoints - CustomMailDomain entity + repository - V16 migration: email dispatch index - V17 migration: custom_mail_domains table - Frontend: use-forum-subscription + use-info-board-subscription hooks - Portal navbar: added info board, events, forum navigation items - i18n: added portal nav translations (de + en) Also fixed pre-existing Phase 2.5/3 compilation issues: - Member entity: added userId field - AuditService: added convenience overloads (logEvent, 4-param log) - AuditEventType: added INFO_BOARD_POST_UPDATED, INFO_BOARD_POST_DELETED - QuotaViolationCode: added TIER_UPGRADE_REQUIRED - StaffPermissionChecker: added requirePermission(UserDetails, ...) - TenantContext: added getCurrentTenantId() alias - MemberRepository: added findByUserId, findByClubId, findAllByClubId - EmailServiceTest: updated for new constructor signature