🐛[BUG]ProFormMoney组件如果设置了customSymbol为A$或者AU$，输入框输入金额会被裁切

### 🐛 bug 描述
ProFormMoney组件中如果设置了customSymbol, 如果是单个$则正常，如果$前面有字符则会出现bug, 输入的金额会被裁切，只能输入一个字符

### 📷 复现步骤

### 💻 复现代码

### © 版本信息

- ProComponents 版本: [2.6.50]
- umi 版本 4.0.1
- 浏览器环境 Chrome 122.0.6261.129
- 开发环境 [Windows 10]

### 🚑 其他信息

Start by reproducing the issue with the provided ProFormMoney example using customSymbol="AU$" in Chrome, then inspect the ProFormMoney handling of customSymbol and input values. Done means amounts are no longer clipped when the symbol contains characters before $, while the existing single-$ behavior remains working.

Written by the indexing model from the issue text.