Back button isn't visible when artist has a white portrait background

[Insprill]

Describe the bug (BUG 描述)
On the artist page, if the background of the portrait image is white, you can't see the back button.

To Reproduce (复现步骤)

1. Find an artist with a white portrait background (e.g. Bruce Springsteen)
2. You won't be able to see the back button.

Expected behavior (期望行为)
The button should have a slight drop shadow, or some other way make it visible against any background.

Screenshots (截图)
This screenshot is the top half of my screen when viewing Bruce Springsteen in my library. You cannot see the back button.

Platform and Device Info (操作系统及设备信息)

• OS: IOS v16.7.9
• Version: v1.3.0

Music Server Type (音乐服务器类型)
Navidrome v0.52.5

[gitbobobo]

1.3.1 has been released.