fix: 🐛 wd-textarea组件maxlength限制长度无效

[zqran]

🤔 这个 PR 的性质是？(至少选择一个)

• 日常 bug 修复
• 新特性提交
• 站点、文档改进
• 演示代码改进
• 组件样式/交互改进
• TypeScript 定义更新
• CI/CD 改进
• 包体积优化
• 性能优化
• 功能增强
• 国际化改进
• 代码重构
• 代码风格优化
• 测试用例
• 分支合并
• 其他改动（是关于什么的改动？）

🔗 相关 Issue

问题描述：在 form 表单中使用 textarea 组件，并设置了 maxlength 属性时，textarea 的文本长度第一次渲染正常，从第二次开始 maxlength 的限制会失效，导致，整个文本内容都被渲染出来。

问题复现：

11.mp4

💡 需求背景和解决方案

// 当前文本域文字长度
const currentLength = computed(() => {
  // 当前长度，每次都应该通过 `formatValue` 来格式化
  return String(formatValue(props.modelValue) || '').length
})

☑️ 请求合并前的自查清单

⚠️ 请自检并全部勾选全部选项。⚠️

• 文档已补充或无须补充
• 代码演示已提供或无须提供
• TypeScript 定义已补充或无须补充

Summary by CodeRabbit

• Bug Fixes
  • 修复了文本区域长度计算不准确的问题，通过引入格式化逻辑来确保文本值的准确性。

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[coderabbitai]

Walkthrough

此次更改涉及 wd-textarea.vue 组件中 currentLength 计算属性的修改。计算文本区域值长度的方式被更新，从直接使用 props.modelValue，改为使用 formatValue 函数，以确保在计算长度之前对值进行适当处理，从而提高计算的准确性。

Changes

文件	更改摘要
src/uni_modules/wot-design-uni/components/wd-textarea/wd-textarea.vue	更新 currentLength 计算属性以使用 formatValue 函数计算文本区域值的长度。

Poem

🐰 在文本框里轻轻跳，
长度不再有烦恼。
格式化，让它更美，
计算准确心情好！
哦，文本如花绽放，
快乐写作不停放。 🌼

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[coderabbitai]

Actionable comments posted: 0

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between febe730 and 614c3da.

Files selected for processing (1)

• src/uni_modules/wot-design-uni/components/wd-textarea/wd-textarea.vue (1 hunks)

Additional comments not posted (1)

src/uni_modules/wot-design-uni/components/wd-textarea/wd-textarea.vue (1)

172-172: 优化 currentLength 计算属性的实现

通过使用 formatValue 函数处理 props.modelValue，确保在计算长度之前对值进行适当的格式化，这有助于提高计算的准确性和组件的健壮性。