[Feature]: Always show clickable coords and bottom Jump In button on What's On event details

### Summary

Improve "Jump In" access on the What's On event details for non-live events: make the event coordinates always clickable, and add a Jump In button at the bottom of the event details (in addition to the existing top placement), matching the in-world experience.

### Problem / Motivation

A user reported that the Jump In button at the bottom of an event's details on the What's On page is visible from the in-world client but missing on the website for events that are not yet live. Discussion in the thread clarified that the button was intentionally removed for non-live events to prevent new users from jumping into empty/inactive scenes. However, this behavior is also used by recurrent users as a way to discover and visit "interesting" places from the website (a gap that will eventually be covered by a separate Places discovery page).

The team agreed on a middle ground: keep protecting new users from landing in empty spaces by default, while still giving recurrent/informed users an intentional way to jump to the location.

### Priority

Medium

### Target audience

All users

### Area

What's On

### Proposed Solution

1. Once an event goes live, the existing "Add to Calendar" button already changes to "Jump In" — no change needed there (confirmed working as intended).
2. Make the event Coordinates always clickable (for both live and non-live events), so recurrent users who recognize this pattern can jump directly to the location. New users are not expected to intuitively discover this, which is acceptable since the dedicated Places discovery page (separate initiative) will address broader place discovery.
3. Every event's details view should be scrollable to the bottom and include a Jump In button at the bottom, mirroring the in-world experience. More generally, the team wants more "Jump In World" buttons across the site.

Note: A dedicated PLACES page (separate initiative) is in progress and should further help users find scenes/places.

### Acceptance Criteria

- [ ] Event Coordinates are clickable and trigger Jump In, regardless of whether the event is live.
- [ ] Event details panel is scrollable to the bottom and includes a Jump In button at the bottom, for both live and non-live events.
- [ ] Existing behavior where "Add to Calendar" becomes "Jump In" once an event goes live is unchanged.

### Out of scope

- The Places discovery page (tracked as a separate initiative).

### Additional Context

Discussed in Slack thread starting with a report from Flora Gomes that the bottom Jump In button was missing on the website (but present in-world) for non-live events. Vicky de Campos confirmed it was intentionally removed to avoid new users jumping into empty spaces, and proposed making coordinates clickable as a middle ground; Kim Currier and Dawid Krajewski agreed, noting the lack of a Places page is part of why users rely on this Jump In pattern from the website today.

Reported by Flora Gomes
Requested by Braian Mellor via Slack