US‑E1‑01 – Event anlegen

[mvk-abs]

User Story
Als Event Editor möchte ich ein neues Event mit Titel, Ort, Start‑ und Enddatum sowie Beschreibung anlegen, um eine zentrale Datenbasis für die weitere Planung zu schaffen.

**Akzeptanzkriterien**  
```gherkin
Feature: Create Event
  Scenario: Successful event creation
    Given the user is authenticated as "Event Editor"
    When the user enters Title, Location, valid Start and End dates, Description
      And presses "Save"
    Then a new event exists with status "Draft"
      And YY1_EVENT_ID is generated
      And a project is created in S/4HANA and its ProjectUUID is stored with the event
  Scenario: Mandatory field validation
    When the user leaves the Title empty and presses "Save"
    Then the system shows error "Title is required" and no event is persisted
```

**UI Notes**  
- Fiori Elements → Object Page (Draft enabled).  
- Sections: General Data, Dates, Description.  
- “Save” in footer bar triggers CAP action *saveEvent* (calls S/4 API).