fix: geocoder coordinate search results not showing (#2245)

[pierreeurope]

Summary

Fixes #2245

When entering coordinates directly in the geocoder search box (e.g., 3.5260, 98.6736), the marker might not appear because:

1. Pending geocoder API call could overwrite results: If the user types a partial string that triggers the debounced mapbox geocoder, then modifies it to valid coordinates, the pending API call could overwrite the coordinate results when it resolves.

2. Results dropdown might not be visible: The showResults state was not explicitly set to true in the coordinate path, relying on the focus handler which might not have fired.

Changes

In the coordinate detection branch of the onChange handler in geocoder.tsx:

• Clear any pending geocoder debounce timeout to prevent stale API results
• Explicitly set showResults to true to ensure the dropdown is visible

Testing

1. Enable geocoder in kepler.gl
2. Enter coordinates like 3.5260, 98.6736
3. Verify the result appears in the dropdown
4. Press Enter or click the result
5. Verify the marker appears on the map at the correct location