bug(<cosh>): 字体颜色导致部分terminal显示不出/auth部分内容

### Component

copilot-shell (cosh)

### Bug Description

字体颜色导致部分terminal显示不出/auth部分内容

### Steps to Reproduce

none

### Expected Behavior

面向Dark主题能正常显示

### Environment

e.g.iTerm


### Relevant Log Output

```shell

```

### Additional Context

_No response_