[Bug]: Some legend properties in the bullet chart are not working.

[alexsbolduin]

Describe the bug / 问题描述

I've tried different configs. But it doesn't work even on the standard sandbox config.

import { Bullet } from '@ant-design/plots';
import React from 'react';
import { createRoot } from 'react-dom/client';

const DemoBullet = () => {
  const config = {
    // default xField: 'title'、rangeField: 'ranges'、measureField: 'measures'、targetField: 'targets'
    data: [
      {
        title: '满意度',
        ranges: 100,
        measures: 80,
        targets: 85,
      },
    ],
  };
  return <Bullet {...config} />;
};

createRoot(document.getElementById('container')).render(<DemoBullet />);

1. The option to disable concif does not work. Neither option:
   {
   legend: false;
   }
   {
   legend: {color: false};
   }
   {
   legend: {
   color: {},
   size: {},
   },
   }

The first option has an error: Cannot set properties of undefined (setting 'itemMarker’).

2. Not work customization legend title:
   {
   legend: {
   size: {
   title: 'TITLE',
   titleSpacing: 0,
   titleInset: 0,
   titlePosition: 't',
   titleFontSize: 16,
   titleFontFamily: 'sans-serif',
   titleFontWeight: 500,
   titleLineHeight: 20,
   titleTextAlign: 'center',
   titleTextBaseline: 'middle',
   titleFill: '#000',
   titleFillOpacity: 0.9,
   titleStroke: '#DAF5EC',
   titleStrokeOpacity: 0.9,
   titleLineWidth: 2,
   titleLineDash: [4, 8],
   titleOpacity: 1,
   titleShadowColor: '#d3d3d3',
   titleShadowBlur: 10,
   titleShadowOffsetX: 10,
   titleShadowOffsetY: 10,
   titleCursor: 'pointer',
   },
   },
   }

3. Not work itemMarker figures: itemMarker: "triangle", or another.
   legend: {
   color: {
   itemMarker: "bowtie",
   itemMarkerSize: 20
   }
   }

Please, help.

Reproduction link / 复现链接

No response

Steps to Reproduce the Bug or Issue / 重现步骤

No response

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• IE (Nonsupport / 不支持)
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[dosubot]

The Bullet chart in @ant-design/plots does not currently support disabling the legend with legend: false, customizing the legend title, or changing the legend marker shape via config. These options are hardcoded in the chart's implementation, so attempts to use them either have no effect or cause errors like "Cannot set properties of undefined (setting 'itemMarker')" when legend is set to false or misconfigured. The chart always expects a legend object and forcibly sets the marker shape internally, ignoring user overrides. Legend title customization and size legend options are also not supported for Bullet charts—only the color legend is rendered, and its title cannot be changed via config. If you need a custom legend, you can build your own legend UI outside the chart and control the chart state via chart instance methods or events. More details on this behavior are in the Bullet chart adaptor code and class defaults.

To reply, just mention @dosu.

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