- Created `MailServiceApplication` with Spring Boot setup.
- Added `MailPollingService` for IMAP polling, `TurnierNr` extraction, and auto-reply functionality.
- Implemented structured email sending for online nominations via `OnlineNennungFormular`.
- Updated frontend with `Erfolgsscreen` for nomination confirmation and fallback handling.
- Added build configurations for Mail-Service and frontend nomination module.
- Documented phase-based roadmap for Online-Nennung and Mail-Service rollout.