feat(setting): 添加清空歌词排除列表功能

[MoYingJi]

新增「清空此页」按钮，同时为清空和重置添加确认提示

[gemini-code-assist]

Summary of Changes

Hello @MoYingJi, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

此拉取请求旨在增强歌词排除列表设置页面的用户体验和操作安全性。通过引入“清空此页”功能，用户可以更便捷地管理他们的排除列表，同时为“清空”和“重置”操作添加了明确的确认提示，有效避免了意外数据丢失，确保了用户操作的意图性。

Highlights

• 新增清空功能: 在歌词排除列表设置中，新增了“清空此页”按钮，允许用户一键清空当前页面的排除项（关键词或正则表达式）。
• 操作确认提示: 为“清空此页”和“重置此页”操作都添加了确认对话框，以防止用户误操作，提升用户体验。

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[gemini-code-assist]

Code Review

这个 PR 添加了清空歌词排除列表的功能，并为清空和重置操作增加了确认对话框，提升了用户体验和操作安全性。代码实现基本正确，但我发现 clear 和 reset 函数中存在大量重复代码。我建议将通用逻辑提取到一个辅助函数中，以提高代码的可读性和可维护性。