feat: add ThemedChart wrapper component

src/design-system/composites/ThemedChart/ThemedChart.test.tsx

@@ -0,0 +1,46 @@
+import { describe, it, expect } from 'vitest'
+import { render } from '@testing-library/react'
+import { ThemedChart } from './ThemedChart'
+import { Line } from 'recharts'
+
+// Recharts uses ResizeObserver internally
+class ResizeObserverMock {
+  observe() {}
+  unobserve() {}
+  disconnect() {}
+}
+globalThis.ResizeObserver = ResizeObserverMock as any
+
+describe('ThemedChart', () => {
+  it('renders nothing when data is empty', () => {
+    const { container } = render(
+      <ThemedChart data={[]}>
+        <Line dataKey="value" />
+      </ThemedChart>,
+    )
+    expect(container.innerHTML).toBe('')
+  })
+
+  it('renders a chart container when data is provided', () => {
+    const data = [
+      { time: '10:00', value: 10 },
+      { time: '10:01', value: 20 },
+    ]
+    const { container } = render(
+      <ThemedChart data={data} height={160}>
+        <Line dataKey="value" />
+      </ThemedChart>,
+    )
+    expect(container.querySelector('.recharts-responsive-container')).toBeTruthy()
+  })
+
+  it('applies custom className', () => {
+    const data = [{ time: '10:00', value: 5 }]
+    const { container } = render(
+      <ThemedChart data={data} className="my-chart">
+        <Line dataKey="value" />
+      </ThemedChart>,
+    )
+    expect(container.querySelector('.my-chart')).toBeTruthy()
+  })
+})

src/design-system/composites/ThemedChart/ThemedChart.tsx

@@ -0,0 +1,66 @@
+import {
+  ResponsiveContainer,
+  ComposedChart,
+  CartesianGrid,
+  XAxis,
+  YAxis,
+  Tooltip,
+} from 'recharts'
+import { rechartsTheme } from '../../utils/rechartsTheme'
+import { ChartTooltip } from './ChartTooltip'
+
+interface ThemedChartProps {
+  data: Record<string, any>[]
+  height?: number
+  xDataKey?: string
+  xType?: 'number' | 'category'
+  xTickFormatter?: (value: any) => string
+  yTickFormatter?: (value: any) => string
+  yLabel?: string
+  children: React.ReactNode
+  className?: string
+}
+
+export function ThemedChart({
+  data,
+  height = 200,
+  xDataKey = 'time',
+  xType = 'category',
+  xTickFormatter,
+  yTickFormatter,
+  yLabel,
+  children,
+  className,
+}: ThemedChartProps) {
+  if (!data.length) {
+    return null
+  }
+
+  return (
+    <div className={className} style={{ width: '100%', height }}>
+      <ResponsiveContainer width="100%" height="100%">
+        <ComposedChart data={data} margin={{ top: 4, right: 8, bottom: 0, left: 0 }}>
+          <CartesianGrid {...rechartsTheme.cartesianGrid} />
+          <XAxis
+            dataKey={xDataKey}
+            type={xType}
+            {...rechartsTheme.xAxis}
+            tickFormatter={xTickFormatter}
+          />
+          <YAxis
+            {...rechartsTheme.yAxis}
+            tickFormatter={yTickFormatter}
+            label={yLabel ? {
+              value: yLabel,
+              angle: -90,
+              position: 'insideLeft',
+              style: { fontSize: 11, fill: 'var(--text-muted)' },
+            } : undefined}
+          />
+          <Tooltip content={<ChartTooltip />} cursor={rechartsTheme.tooltip.cursor} />
+          {children}
+        </ComposedChart>
+      </ResponsiveContainer>
+    </div>
+  )
+}