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/date_picker_input.tsx

@@ -0,0 +1,17 @@
+import { DatePickerInput as MantineDatePickerInput, DatePicker as MantineDatePicker } from '@mantine/dates'
+import type { DatePickerInputProps as MantineDatePickerInputProps, DatePickerProps as MantineDatePickerProps } from '@mantine/dates'
+import '@mantine/dates/styles.css'
+
+interface DatePickerInputProps extends MantineDatePickerInputProps<'default'> {}
+interface DatePickerProps extends MantineDatePickerProps<'default'> {}
+
+function DatePickerInput(props: DatePickerInputProps) {
+  return <MantineDatePickerInput {...props} />
+}
+
+function DatePicker(props: DatePickerProps) {
+  return <MantineDatePicker {...props} />
+}
+
+export { DatePickerInput, DatePicker }
+export type { DatePickerInputProps, DatePickerProps }