fix(update): 修复更新提示找不到路径

[YueerMoe]

修复 Windows 更新脚本中 cmd 引号转义错误，避免出现「系统找不到路径 "\"」。

• 修复位置：src-tauri/src/services/update.rs
• 原因：cmd.exe 不支持 " 作为转义；改为使用 ""path"" 的双引号写法

[gemini-code-assist]

Summary of Changes

Hello @YueerMoe, 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!

此拉取请求修复了 Windows 更新脚本中的一个关键错误，该错误导致 cmd 命令在处理路径时因不正确的引号转义而失败，从而引发“系统找不到路径”的提示。通过将路径引用从 \" 调整为 "" 格式，确保了 cmd.exe 能够正确解析路径。此外，还引入了一个新的单元测试，以验证更新批处理脚本中路径引用的正确性，从而提高了更新过程的健壮性。

Highlights

• 修复 Windows 更新脚本: 解决了 Windows 更新脚本中 cmd 引号转义错误，该错误导致更新提示出现“系统找不到路径 "\"”的问题。
• 引用转义方式调整: 将 cmd.exe 不支持的 \" 转义方式改为使用 ""path"" 的双引号写法，以正确处理路径。
• 新增单元测试: 为 build_updater_batch 函数添加了单元测试，确保更新脚本中的路径引用逻辑正确。

Changelog

• src-tauri/src/services/update.rs
  • 调整了 build_updater_batch 函数中生成批处理脚本时，清理临时文件命令的路径引用方式，将 \" 替换为 ""，以兼容 cmd.exe。
  • 为 build_updater_batch 函数添加了新的单元测试，以验证 Windows 更新脚本中路径引用的正确性。
  • 格式化了 UpdatePaths 结构体的初始化代码，使其更易读。

Activity

• 此拉取请求尚未有任何人工活动（如评论或审查）。

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[gemini-code-assist]

Code Review

你好！感谢你对 Windows 更新脚本的修复。通过使用 "" 来转义路径，你解决了 cmd.exe 中一个常见的引号处理问题，这无疑会提高更新过程的稳定性。我还注意到你为此更改添加了单元测试，这是一个非常好的实践，值得称赞。

我发现了一个与引号相关的小问题，可能会导致批处理脚本在某些情况下失败。我在代码中留下了具体的修改建议。请查看。

[gemini-code-assist]

这个测试断言似乎也受到了批处理命令中多余引号的影响。断言检查的字符串末尾包含了四个双引号，而根据修正后的命令，它应该只包含两个双引号。

为了与代码的修复保持一致，请更新此断言。

Suggested change

	assert!(content.contains(
	r#"if exist ""C:\Temp\endfield-cat-update"" rd /s /q ""C:\Temp\endfield-cat-update""""#
	));
	assert!(content.contains(
	r#"if exist ""C:\Temp\endfield-cat-update"" rd /s /q ""C:\Temp\endfield-cat-update"""#
	));