Refactor code structure for improved readability and maintainability

frontend/src/components/ui/checkbox.tsx

@@ -1,26 +0,0 @@
-import * as React from 'react';
-import * as CheckboxPrimitive from '@radix-ui/react-checkbox';
-import { Check } from 'lucide-react';
-
-import { cn } from '@/lib/utils';
-
-const Checkbox = React.forwardRef<
-  React.ElementRef<typeof CheckboxPrimitive.Root>,
-  React.ComponentPropsWithoutRef<typeof CheckboxPrimitive.Root>
->(({ className, ...props }, ref) => (
-  <CheckboxPrimitive.Root
-    ref={ref}
-    className={cn(
-      'peer h-4 w-4 shrink-0 rounded-sm border border-primary ring-offset-background focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 data-[state=checked]:bg-primary data-[state=checked]:text-primary-foreground',
-      className
-    )}
-    {...props}
-  >
-    <CheckboxPrimitive.Indicator className={cn('flex items-center justify-center text-current')}>
-      <Check className="h-4 w-4" />
-    </CheckboxPrimitive.Indicator>
-  </CheckboxPrimitive.Root>
-));
-Checkbox.displayName = CheckboxPrimitive.Root.displayName;
-
-export { Checkbox };