B2B-88: add starter kit structure and elements

packages/ui/src/shadcn/scroll-area.tsx

@@ -0,0 +1,45 @@
+'use client';
+
+import * as React from 'react';
+
+import * as ScrollAreaPrimitive from '@radix-ui/react-scroll-area';
+
+import { cn } from '../lib/utils';
+
+const ScrollArea: React.FC<
+  React.ComponentPropsWithoutRef<typeof ScrollAreaPrimitive.Root>
+> = ({ className, children, ...props }) => (
+  <ScrollAreaPrimitive.Root
+    className={cn('relative overflow-hidden', className)}
+    {...props}
+  >
+    <ScrollAreaPrimitive.Viewport className="h-full w-full rounded-[inherit]">
+      {children}
+    </ScrollAreaPrimitive.Viewport>
+    <ScrollBar />
+    <ScrollAreaPrimitive.Corner />
+  </ScrollAreaPrimitive.Root>
+);
+ScrollArea.displayName = ScrollAreaPrimitive.Root.displayName;
+
+const ScrollBar: React.FC<
+  React.ComponentPropsWithoutRef<typeof ScrollAreaPrimitive.ScrollAreaScrollbar>
+> = ({ className, orientation = 'vertical', ...props }) => (
+  <ScrollAreaPrimitive.ScrollAreaScrollbar
+    orientation={orientation}
+    className={cn(
+      'flex touch-none transition-colors select-none',
+      orientation === 'vertical' &&
+        'h-full w-2.5 border-l border-l-transparent p-[1px]',
+      orientation === 'horizontal' &&
+        'h-2.5 border-t border-t-transparent p-[1px]',
+      className,
+    )}
+    {...props}
+  >
+    <ScrollAreaPrimitive.ScrollAreaThumb className="bg-border relative flex-1 rounded-full" />
+  </ScrollAreaPrimitive.ScrollAreaScrollbar>
+);
+ScrollBar.displayName = ScrollAreaPrimitive.ScrollAreaScrollbar.displayName;
+
+export { ScrollArea, ScrollBar };