fix(input-number): input number 输入 0.00000001 会自动变成科学计数法

[aaamrh]

Types of changes

• New feature
• Bug fix
• Enhancement
• Component style change
• Typescript definition change
• Documentation change
• Coding style change
• Refactoring
• Test cases
• Continuous integration
• Breaking change
• Others

Background and context

input number 组件输入小数会变成科学计数法，0.000000001 -> 1e-8 , 这是机器影响用户体验。
并且 react 版本并不存在这个问题。
经过搜索发现早期 arco-design-vue是修复过这个问题的 arco-design/arco-design#865

问题复现路径：
在文档中就能复现

Solution

• 新增 toSafeString 工具函数来处理科学计数法转换

• 修改 getStringValue 函数，使用 toSafeString 替代原生的 String() 方法

• 使用 number-precision 库确保精确的数值转换

• 📁 packages/web-vue/components/input-number/utils.ts - 新增工具函数

• 📁 packages/web-vue/components/input-number/input-number.tsx - 修改核心逻辑

• 📁 packages/web-vue/components/input-number/__test__/index.test.ts - 添加测试用例

How is the change tested?

添加并通过了组件测试用例。

1.234e5 => 123400

-0.000000000000000000001 => -0.000000000000000000001
等，具体文件在 packages/web-vue/components/input-number/test/index.test.ts`

Changelog

Component	Changelog(CN)	Changelog(EN)	Related issues
InputNumber	InputNumber 组件始终使用非科学计数法展示数值。	The InputNumber component always displays numbers in non-scientific notation.	#3599

Checklist:

• Test suite passes (npm run test)
• Provide changelog for relevant changes (e.g. bug fixes and new features) if applicable.
• Changes are submitted to the appropriate branch (e.g. features should be submitted to feature branch and others
  should be submitted to main branch)

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