initial: mirror of @fn_library from fn_registry

75 components + DESIGN_SYSTEM.md + sync script.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

components/textarea.tsx

@@ -0,0 +1,26 @@
+import * as React from 'react'
+import { Textarea as MantineTextarea } from '@mantine/core'
+
+interface TextareaProps extends Omit<React.ComponentProps<typeof MantineTextarea>, 'autosize'> {
+  autoResize?: boolean
+}
+
+const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
+  ({ className, autoResize = false, ...props }, ref) => {
+    return (
+      <MantineTextarea
+        ref={ref}
+        data-slot="textarea"
+        autosize={autoResize}
+        minRows={autoResize ? 2 : undefined}
+        size="sm"
+        className={className}
+        {...props}
+      />
+    )
+  }
+)
+Textarea.displayName = 'Textarea'
+
+export { Textarea }
+export type { TextareaProps }