Handle events without coordinates to avoid placing them at the map center.

[Mitchina]

Description

Currently, events submitted without coordinates are displayed at the center of the map by default. This can be misleading and may affect the user experience by suggesting a location that does not exist.

This can occurs because the issue form does not require the coordinates data because some events are fully online, and creators may also submit events before the location is finalized or known. As a result, coordinates may be missing at the time of event creation.

Example of an event without coordinates placed at the map center:

Goals:

-Develop a robust approach to handle events without coordinates, accounting for cases where events are fully online or locations are pending, such as excluding them from the map or placing them in a designated area (e.g., a specific zone for online events or “location TBD” section).

-Ensure the solution integrates smoothly with existing event categories and marker logic, maintaining clear visual distinction and usability.

[benjaoming]

@Mitchina I'm doing a quick update that should skip events without coordinates. But I definitely like your solution to figure out a special place for them!