As a casual user, I want to collapse news events, so that I can get an overview of multiple news events at my scren at once

### Description

Hello sir/madam, I don't like scrolling, please let me collapse event cards. :heart:

### Definition of Done

- [ ] Add a button to collapse a single news event so it only shows the title
- [ ] Add a button to expand a collapsed event
- [ ] Add a button for collapsing/expanding all news events

Start by locating the news event card entry point in the TypeScript frontend. Confirm how a single event is rendered and how the collection of events is managed. Done means each event can show only its title, individual events can be expanded again, and all events can be collapsed or expanded together.

Written by the indexing model from the issue text.