feat: 避免含有标题的较短本地音乐因时长或文件大小而被排除

[kyv001]

在一些专辑中（如Exhale EP - Devin Wild）会有作为过渡的短小间奏曲目。这些曲目的本地文件往往时长小于30秒或者文件大小小于1MB从而会被本地曲目扫描器排除。但这些曲目作为专辑的一部分不应被排除。

解决方案：仅当确认本地文件没有标题时将过短或过小的音频文件过滤，避免误伤短小曲目。

[gemini-code-assist]

Summary of Changes

Hello @kyv001, 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!

此拉取请求旨在改进本地音乐扫描器的行为，以更智能地处理短小或文件大小较小的音乐文件。通过修改过滤逻辑，它现在能够识别并包含那些作为专辑一部分但可能因其时长或大小而被错误排除的合法曲目，特别是那些带有标题的间奏曲。

Highlights

• 优化本地音乐扫描逻辑: 移除了对小于1MB文件的无条件排除，并调整了时长和文件大小的过滤规则。
• 避免误伤短小曲目: 现在，只有当本地音乐文件没有标题元数据时，才会应用时长（小于30秒或大于2小时）和文件大小（小于1MB）的过滤规则。
• 提升用户体验: 确保专辑中的短小间奏曲目（如EP中的过渡曲）能够被正确扫描和显示，即使它们时长很短或文件很小。

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[gemini-code-assist]

Code Review

你好，感谢你的贡献。这个 PR 的改动很棒，它通过仅在音轨无标题时进行时长和大小过滤，巧妙地解决了短小曲目（如专辑中的间奏曲）被错误排除的问题。

代码实现逻辑清晰，我只有一些关于代码可读性和可维护性的建议：

1. 可以将两个关于时长的 if 判断合并，使代码更简洁。
2. 建议将过滤条件中的魔法数字（如 30, 7200）提取为具名常量，以提高代码的可读性和可维护性。

具体的修改建议请见我的行间评论。总体来说，这是一个很好的改进！

[gemini-code-assist]

为了使代码更简洁，可以将两个关于时长的 if 判断合并为一个。这样可以减少代码行数，并使过滤逻辑更紧凑。

Suggested change

	// 时长 < 30s
	if (metadata.format.duration && metadata.format.duration < 30) return;
	// 时长 > 2h (7200s)
	if (metadata.format.duration && metadata.format.duration > 7200) return;
	// 时长 < 30s 或 > 2h (7200s)
	if (metadata.format.duration && (metadata.format.duration < 30 || metadata.format.duration > 7200)) return;