feat(ext): draft extension structure (single-page mode)

packages/extension/src/components/ui/button.tsx

@@ -0,0 +1,60 @@
+import { Slot } from '@radix-ui/react-slot'
+import { type VariantProps, cva } from 'class-variance-authority'
+import * as React from 'react'
+
+import { cn } from '@/lib/utils'
+
+const buttonVariants = cva(
+	"inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-all disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg:not([class*='size-'])]:size-4 shrink-0 [&_svg]:shrink-0 outline-none focus-visible:border-ring focus-visible:ring-ring/50 focus-visible:ring-[3px] aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 aria-invalid:border-destructive",
+	{
+		variants: {
+			variant: {
+				default: 'bg-primary text-primary-foreground hover:bg-primary/90',
+				destructive:
+					'bg-destructive text-white hover:bg-destructive/90 focus-visible:ring-destructive/20 dark:focus-visible:ring-destructive/40 dark:bg-destructive/60',
+				outline:
+					'border bg-background shadow-xs hover:bg-accent hover:text-accent-foreground dark:bg-input/30 dark:border-input dark:hover:bg-input/50',
+				secondary: 'bg-secondary text-secondary-foreground hover:bg-secondary/80',
+				ghost: 'hover:bg-accent hover:text-accent-foreground dark:hover:bg-accent/50',
+				link: 'text-primary underline-offset-4 hover:underline',
+			},
+			size: {
+				default: 'h-9 px-4 py-2 has-[>svg]:px-3',
+				sm: 'h-8 rounded-md gap-1.5 px-3 has-[>svg]:px-2.5',
+				lg: 'h-10 rounded-md px-6 has-[>svg]:px-4',
+				icon: 'size-9',
+				'icon-sm': 'size-8',
+				'icon-lg': 'size-10',
+			},
+		},
+		defaultVariants: {
+			variant: 'default',
+			size: 'default',
+		},
+	}
+)
+
+function Button({
+	className,
+	variant = 'default',
+	size = 'default',
+	asChild = false,
+	...props
+}: React.ComponentProps<'button'> &
+	VariantProps<typeof buttonVariants> & {
+		asChild?: boolean
+	}) {
+	const Comp = asChild ? Slot : 'button'
+
+	return (
+		<Comp
+			data-slot="button"
+			data-variant={variant}
+			data-size={size}
+			className={cn(buttonVariants({ variant, size, className }))}
+			{...props}
+		/>
+	)
+}
+
+export { Button, buttonVariants }