[Select] Fix ScrollUpButton bug, add empty state, and consider Base UI migration

[ravisuhag]

Summary

Select wraps Radix UI with Ariakit for autocomplete support. Has a bug in scroll button assignment, accessibility role conflicts, and hardcoded magic numbers.

Improvements

1. Fix ScrollUpButton bug

ScrollUpButton is incorrectly assigned to SelectPrimitive.ScrollDownButton (line 12). Should be SelectPrimitive.ScrollUpButton.

6. Add empty state customization

No props for custom "no options" message. Currently relies on implicit CSS selector-based detection.

8. Consider Base UI migration

Component uses Radix UI while the project is migrating to Base UI (ColorPicker, Dialog, Sheet already migrated).

Moved to Cross-Cutting Issues

The following items have been moved to cross-cutting issues that address them across all components:

• Replace hardcoded CSS values with design tokens (Replace hardcoded CSS values with design tokens #672)
• Accessibility baseline (Accessibility baseline: aria attributes, roles, and semantic HTML #673)
• Add displayName (Add displayName to components and sub-components #676)

Files

• packages/raystack/raystack/components/select/