feat: add admin operations suite

src/components/admin/dashboard-chart.tsx

@@ -0,0 +1,15 @@
+'use client'
+
+import { Card, CardContent, CardHeader, CardTitle } from '@/components/ui/card'
+
+interface ChartDataPoint { label: string; value: number }
+
+export function DashboardChart({ title, data, description }: { title: string; data: ChartDataPoint[]; color?: string; description?: string }) {
+  const max = Math.max(1, ...data.map((point) => point.value))
+  return (
+    <Card>
+      <CardHeader className="pb-2"><CardTitle className="text-sm font-medium">{title}</CardTitle>{description && <p className="text-xs text-muted-foreground">{description}</p>}</CardHeader>
+      <CardContent><div className="flex h-[200px] items-end gap-1" aria-label={title}>{data.map((point) => <div key={point.label} className="flex min-w-0 flex-1 flex-col items-center gap-1"><span className="text-[10px] text-muted-foreground">{point.value}</span><div className="w-full rounded-t bg-[var(--admin-accent)]" style={{ height: `${Math.max(2, (point.value / max) * 150)}px` }} title={`${point.label}: ${point.value}`} /><span className="max-w-full truncate text-[9px] text-muted-foreground">{point.label}</span></div>)}</div></CardContent>
+    </Card>
+  )
+}