feat: The Other Dude v9.0.1 — full-featured email system

ci: add GitHub Pages deployment workflow for docs site

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/components/monitoring/Sparkline.tsx

@@ -0,0 +1,24 @@
+import { LineChart, Line } from 'recharts'
+
+interface SparklineProps {
+  data: number[]
+  color?: string
+  width?: number
+  height?: number
+}
+
+export function Sparkline({ data, color = '#38BDF8', width = 60, height = 24 }: SparklineProps) {
+  const chartData = data.map((v, i) => ({ v, i }))
+  return (
+    <LineChart width={width} height={height} data={chartData}>
+      <Line
+        type="monotone"
+        dataKey="v"
+        stroke={color}
+        dot={false}
+        strokeWidth={1.5}
+        isAnimationActive={false}
+      />
+    </LineChart>
+  )
+}