Report a problem tool

> UI-wise, it would make sense to put a link "report a bug (+ export a Geojson)" in the top-right bar, accessible at any time
>
> Hmm... maybe. In [another project](https://npw.scot), we chose to put a small button in the bottom-left of the map:
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> 
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> Users can opt into including their full project there:
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> I might split this out into a separate issue to do similar here.

_Originally posted by @dabreegster in [#387](https://github.com/a-b-street/ltn/issues/387#issuecomment-2976153464)_

The issue references a UI feature for reporting bugs with GeoJSON export, similar to another project. Look at the existing UI components in the frontend code, likely in a directory like `src/ui` or `web-ui`. Find where the top-right bar or map overlay buttons are defined. The feature involves adding a clickable element that triggers a modal or form, and exporting GeoJSON data. Check how map state or project data is currently accessed and serialized to GeoJSON. A good starting point is to examine the code for the map interface and any existing modal/dialog components.

Written by the indexing model from the issue text.