feat(dashboard): integrate Checkbox component for comparison toggle in Chart, enhancing user interaction

components/dashboard/Chart.tsx

@@ -16,6 +16,7 @@ import type { TooltipProps } from 'recharts'
 import { formatNumber, formatDuration } from '@/lib/utils/format'
 import { ArrowTopRightIcon, ArrowBottomRightIcon, DownloadIcon, BarChartIcon } from '@radix-ui/react-icons'
 import { Button } from '@/components/ui/Button'
+import { Checkbox } from '@/components/ui/Checkbox'
 
 const COLORS = {
   brand: '#FD5E0F',
@@ -346,15 +347,11 @@ export default function Chart({ data, prevData, stats, prevStats, interval }: Ch
           {/* Right side: Controls */}
           <div className="flex items-center gap-3 self-end sm:self-auto">
             {prevData?.length ? (
-              <label className="flex cursor-pointer items-center gap-2 text-sm font-medium text-neutral-600 dark:text-neutral-400 hover:text-neutral-900 dark:hover:text-neutral-200 transition-colors select-none">
-                <input
-                  type="checkbox"
-                  checked={showComparison}
-                  onChange={() => setShowComparison((s) => !s)}
-                  className="h-4 w-4 rounded border-neutral-300 text-brand-orange focus:ring-brand-orange dark:border-neutral-600 dark:bg-neutral-800 focus:ring-offset-0"
-                />
-                <span>Compare</span>
-              </label>
+              <Checkbox
+                checked={showComparison}
+                onCheckedChange={setShowComparison}
+                label="Compare"
+              />
             ) : null}
 
             {/* Vertical Separator */}

components/ui/Checkbox.tsx

@@ -0,0 +1,44 @@
+import React from 'react';
+import { CheckIcon } from '@radix-ui/react-icons';
+
+export interface CheckboxProps extends Omit<React.InputHTMLAttributes<HTMLInputElement>, 'onChange'> {
+  checked?: boolean;
+  onCheckedChange?: (checked: boolean) => void;
+  label?: React.ReactNode;
+}
+
+export const Checkbox = React.forwardRef<HTMLInputElement, CheckboxProps>(
+  ({ className = '', checked, onCheckedChange, label, disabled, ...props }, ref) => {
+    return (
+      <label className={`inline-flex items-center gap-2 cursor-pointer select-none group ${disabled ? 'opacity-50 cursor-not-allowed' : ''}`}>
+        <div className="relative flex items-center justify-center">
+          <input
+            type="checkbox"
+            ref={ref}
+            className="peer sr-only"
+            checked={checked}
+            onChange={(e) => onCheckedChange?.(e.target.checked)}
+            disabled={disabled}
+            {...props}
+          />
+          <div className={`
+            w-5 h-5 rounded-md border transition-all duration-200 flex items-center justify-center
+            ${checked 
+              ? 'bg-brand-orange border-brand-orange text-white' 
+              : 'bg-white dark:bg-neutral-900 border-neutral-300 dark:border-neutral-700 group-hover:border-brand-orange/50'}
+            peer-focus-visible:ring-2 peer-focus-visible:ring-brand-orange/20 peer-focus-visible:ring-offset-2
+          `}>
+            <CheckIcon className={`w-3.5 h-3.5 transition-transform duration-200 ${checked ? 'scale-100' : 'scale-0'}`} />
+          </div>
+        </div>
+        {label && (
+          <span className="text-sm font-medium text-neutral-600 dark:text-neutral-400 group-hover:text-neutral-900 dark:group-hover:text-neutral-200 transition-colors">
+            {label}
+          </span>
+        )}
+      </label>
+    );
+  }
+);
+
+Checkbox.displayName = 'Checkbox';