fix(tabs): fix content adaptive problem when direction is rtl

[jadelike-wine]

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

#3280

Solution

How is the change tested?

  <a-tabs default-active-key="2" style="direction: rtl;" >
    <a-tab-pane key="1" title="Tab 1">
      Content of Tab Panel 1
    </a-tab-pane>
    <a-tab-pane key="2" title="Tab 2">
      Content of Tab Panel 2
    </a-tab-pane>
    <a-tab-pane key="3">
      <template #title>Tab 3</template>
      Content of Tab Panel 3
    </a-tab-pane>
  </a-tabs>

Changelog

Component	Changelog(CN)	Changelog(EN)	Related issues
tabs	解决 direction为 rtl 时内容自适应问题	fix content adaptive problem when direction is rtl	#3280

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)

Other information

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[oljc]

@jadelike-wine 感谢你的贡献！该 PR 解决了部分 issues 中提到的问题，但仍存在一些不足，尚未完全解决 RTL 模式下的样式问题。由于 Tabs 在 RTL 模式下需要处理的样式变动较多，建议参考 React 版 RTL 进一步完善。或者交由 Maintainer 后续优化。

[jadelike-wine]

@jadelike-wine 感谢你的贡献！该 PR 解决了部分 issues 中提到的问题，但仍存在一些不足，尚未完全解决 RTL 模式下的样式问题。由于 Tabs 在 RTL 模式下需要处理的样式变动较多，建议参考 React 版 RTL 进一步完善。或者交由 Maintainer 后续优化。

@oljc ok,我去看下react那边的源码吧先