Why force use unicode-icon for the volume?

I just dont know why it force use unicode-icon for the volume.

<img width="518" height="102" alt="Image" src="https://github.com/user-attachments/assets/7ad6a110-c8c3-4a4e-9079-d931afd85684" />

#### Here is my `vol.sh`
```sh
MECHREVO|lym> cat vol.sh
#!/bin/sh
wpctl get-volume @DEFAULT_AUDIO_SINK@ | awk '{printf "%d%%", $2*100}'
```