Polygon with 2 vertices disappears on click

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## How to reproduce?
- set draw polygon mode
- tap two vertices on the map
- click on each on the two vertices

## Expected result
- nothing happens

## Actual result
- the polygon disappears and the map enters in simple_select mode

## possible correction

```
import { MapboxDrawCustomMode } from '@mapbox/mapbox-gl-draw';
import MapboxDraw from '@mapbox/mapbox-gl-draw';

const DrawModes = {
SIMPLE_SELECT: 'simple_select',
DIRECT_SELECT: 'direct_select'
};

// Start with a copy of the original draw_polygon mode
const DrawPolygonMode = MapboxDraw.modes.draw_polygon;

// Override or extend the mode with custom functionality
export const DrawPolygonModeUndo: MapboxDrawCustomMode = {
...DrawPolygonMode, // Copy all existing methods
clickOnVertex(state) {
// If there are more than 2 vertices, finish the polygon on vertex click
// This corrects a bug, where if there are only two vertices and a vertex is clicked,
// the polygon is closed and disappears.

// Check if state has property 'polygon'
if (!('polygon' in state)) {
return;
}

if (state.currentVertexPosition > 2) {
// Only close the polygon if there are more than 2 vertices
return this.changeMode(DrawModes.SIMPLE_SELECT, { featureIds: [state.polygon.id] });
}
}
};

```

Start with the draw_polygon mode and reproduce the issue by creating a polygon with two vertices, then clicking either vertex. Check the vertex-click behavior and verify that two-vertex polygons remain visible and the map does not enter simple_select mode, while polygons with more than two vertices retain their expected behavior.

Written by the indexing model from the issue text.