Fix ReservationList infinite update loop under React 18/19

[mazdak]

Summary

This change fixes a potential infinite update loop in the Agenda’s ReservationList when used with newer React versions (18/19+).

The current implementation of ReservationList.componentDidUpdate uses prevProps !== this.props as part of its guard:

With React 18/19 and the new architecture, props objects are often recreated on each render. As a result, prevProps !== this.props can be true on every update, even when the values have not changed. Combined with setState in componentDidUpdate, this can cause ReservationList to continually update, leading to:

• Error: Maximum update depth exceeded. This can happen when a component repeatedly calls setState inside componentWillUpdate or componentDidUpdate.
• A component stack pointing at ReservationList → Agenda.

What this PR changes

ReservationList.componentDidUpdate is updated to only respond when:

• The visible topDay actually changes (by value), or
• The items reference changes while topDay stays the same.

This keeps the original behavior (recomputing reservations when topDay moves or items change) but avoids treating a new props object as a guaranteed change. In practice this:

• Prevents unnecessary updateReservations calls on every render.
• Avoids “Maximum update depth exceeded” loops under React 18/19/new architecture.

Impact

• No public API changes.
• No behavior change for callers that update topDay or items explicitly.
• Improves compatibility with React 18/19 and React Native new architecture, where props identity is not stable.

I’ve tested this change against a real app using Agenda under React 19 / RN 0.81, where it eliminates the infinite update crash (ReservationList → Agenda) without regressing scrolling behavior.

[feri-irawan]

We need this