[bug]: model category separator is too subtle

[keturn]

Is there an existing issue for this problem?

• I have searched the existing issues

Version number

3.6.0rc1

Browser

chrome 126

What happened

In the model selector, models are sorted by base model type, which is fine and good as that has a lot to do with the capabilities and qualities of the model.

But the separator is way too understated:

What you expected to happen

Clearer indication of when I have scrolled to a different model category.

Additional context

A few possible UI options:

• change foreground or background color
• add some border
• make that model-type header sticky so it's always visible even when you're in the middle of the list
• submenus

[HenryLoenwind]

for example. That's a quick&dirty color invert.