[Feature] 下载按钮禁用效果不明显

[SettingDust]

What new features do you want? (你想要什么新功能)

希望可以明显点xd，上面是已下载的

Additional context (额外说明)

No response

This issue is unique (这个issue是唯一的)

• [X] I have searched the issue tracker and did not find an issue describing my request.

[kaniol-lck]

给禁用状态下的颜色加深了一点：