localeParse missing A → a replacement causes date-fns crash with use12Hours

[daedalus28]

Bug

When using the date-fns generateConfig with use12Hours, the picker crashes with:

RangeError: Format string contains an unescaped latin alphabet character `A`

This happens because use12Hours causes rc-picker to internally inject uppercase A (moment.js AM/PM token) into the format string. The localeParse function in src/generate/dateFns.ts converts other moment tokens to date-fns equivalents but doesn't handle A → a:

const localeParse = (format: string) =>
  format
    .replace(/Y/g, 'y')
    .replace(/D/g, 'd')
    .replace(/gggg/, 'yyyy')
    .replace(/g/g, 'G')
    .replace(/([Ww])o/g, 'wo');
    // missing: .replace(/A/g, 'a')

date-fns uses lowercase a for AM/PM (hh:mm:ss a), while moment.js uses uppercase A. Since localeParse already handles the other moment → date-fns conversions, this one was likely just missed.

Suggested fix

Add .replace(/A/g, 'a') to localeParse:

const localeParse = (format: string) =>
  format
    .replace(/Y/g, 'y')
    .replace(/D/g, 'd')
    .replace(/gggg/, 'yyyy')
    .replace(/g/g, 'G')
    .replace(/([Ww])o/g, 'wo')
    .replace(/A/g, 'a');

Reproduction

import dateFnsGenerateConfig from '@rc-component/picker/es/generate/dateFns'
import generatePicker from 'antd/es/date-picker/generatePicker'

const DatePicker = generatePicker<Date>(dateFnsGenerateConfig)

// This crashes:
<DatePicker showTime use12Hours />

Versions

• @rc-component/picker: 1.9.1
• date-fns: 4.1.0
• antd: 6.3.5