fix: Carousel keyboard navigation for vertical orientation

[mahdirajaee]

Bug

Fixes #10219

The Carousel component's handleKeyDown callback only handles ArrowLeft and ArrowRight keys, regardless of the carousel's orientation. When orientation is set to "vertical", pressing ArrowUp/ArrowDown does nothing, and ArrowLeft/ArrowRight still triggers prev/next navigation, which is incorrect for a vertical layout.

Fix

Updated handleKeyDown to check the orientation prop and select the appropriate key bindings:

• Horizontal (default): ArrowLeft for previous, ArrowRight for next
• Vertical: ArrowUp for previous, ArrowDown for next

Added orientation to the useCallback dependency array so the handler updates when orientation changes.

Files changed

• apps/v4/registry/bases/base/ui/carousel.tsx
• apps/v4/registry/bases/radix/ui/carousel.tsx

Both the base and radix implementations have been updated with the same fix.

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