👑 [需求] 表格背景色改变时，需保证文本的识别性

### 🥰 需求描述 [详细地描述需求，让大家都能理解]
表格自定义 Header 背景色时，如调成深色，背景色与文本色颜色差异度不够，解决方案建议如下

### 🧐 解决方案 [如果你有解决方案，在这里清晰地阐述]

### 🚑 其他信息 [如截图等其他信息可以贴在这里]

The issue provides only a screenshot and does not name any files, tests, or entry points. Start by reproducing a table with a custom dark Header background, then locate the table header styling in the components editor. Done means the header text remains clearly readable across supported background colors, with coverage for the changed behavior.

Written by the indexing model from the issue text.