feat: add Analytics page with scan stats API

Charts and JSON export for scan volume; completes core nav surface.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/app/analytics/page.tsx

@@ -0,0 +1,140 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import {
+  Bar,
+  BarChart,
+  CartesianGrid,
+  ResponsiveContainer,
+  Tooltip,
+  XAxis,
+  YAxis,
+} from "recharts";
+import { motion } from "framer-motion";
+import { Download, TrendingUp } from "lucide-react";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Button } from "@/components/ui/button";
+
+type Stats = {
+  total: number;
+  completed: number;
+  failed: number;
+  successRate: number;
+  daily: { date: string; scans: number; completed: number }[];
+  topDomains: { domain: string; count: number }[];
+};
+
+export default function AnalyticsPage() {
+  const [stats, setStats] = useState<Stats | null>(null);
+
+  useEffect(() => {
+    fetch("/api/analytics/stats")
+      .then((r) => r.json())
+      .then(setStats)
+      .catch(() => setStats(null));
+  }, []);
+
+  const exportSummary = () => {
+    if (!stats) return;
+    const blob = new Blob([JSON.stringify(stats, null, 2)], {
+      type: "application/json",
+    });
+    const url = URL.createObjectURL(blob);
+    const a = document.createElement("a");
+    a.href = url;
+    a.download = "domain-scanner-analytics.json";
+    a.click();
+    URL.revokeObjectURL(url);
+  };
+
+  return (
+    <div className="mx-auto max-w-6xl px-4 pb-24 pt-24">
+      <div className="flex flex-col gap-4 sm:flex-row sm:items-end sm:justify-between">
+        <div>
+          <h1 className="text-4xl font-bold tracking-tight md:text-5xl">Analytics</h1>
+          <p className="mt-2 text-zinc-400">
+            Scan volume, success rate, and top domains — last 7 days.
+          </p>
+        </div>
+        <Button variant="secondary" onClick={exportSummary} disabled={!stats}>
+          <Download className="h-4 w-4" /> Export JSON
+        </Button>
+      </div>
+
+      <div className="mt-10 grid gap-4 sm:grid-cols-3">
+        {[
+          { label: "Total scans", value: stats?.total ?? "—" },
+          { label: "Success rate", value: stats ? `${stats.successRate}%` : "—" },
+          { label: "Failed", value: stats?.failed ?? "—" },
+        ].map((kpi, i) => (
+          <motion.div
+            key={kpi.label}
+            initial={{ opacity: 0, y: 12 }}
+            animate={{ opacity: 1, y: 0 }}
+            transition={{ delay: i * 0.08 }}
+          >
+            <Card className="glass">
+              <CardContent className="pt-6">
+                <p className="text-sm text-zinc-500">{kpi.label}</p>
+                <p className="mt-1 text-3xl font-semibold tabular-nums">{kpi.value}</p>
+              </CardContent>
+            </Card>
+          </motion.div>
+        ))}
+      </div>
+
+      <Card className="glass mt-8">
+        <CardHeader>
+          <CardTitle className="flex items-center gap-2">
+            <TrendingUp className="h-5 w-5" /> Scans per day
+          </CardTitle>
+        </CardHeader>
+        <CardContent className="h-72">
+          {stats?.daily.length ? (
+            <ResponsiveContainer width="100%" height="100%">
+              <BarChart data={stats.daily}>
+                <CartesianGrid strokeDasharray="3 3" stroke="#333" />
+                <XAxis dataKey="date" tick={{ fill: "#a1a1aa", fontSize: 12 }} />
+                <YAxis tick={{ fill: "#a1a1aa", fontSize: 12 }} />
+                <Tooltip
+                  contentStyle={{
+                    background: "#18181b",
+                    border: "1px solid #3f3f46",
+                    borderRadius: 8,
+                  }}
+                />
+                <Bar dataKey="scans" fill="#8b5cf6" radius={[4, 4, 0, 0]} />
+                <Bar dataKey="completed" fill="#22d3ee" radius={[4, 4, 0, 0]} />
+              </BarChart>
+            </ResponsiveContainer>
+          ) : (
+            <p className="py-16 text-center text-zinc-500">
+              Run scans from the dashboard to populate charts.
+            </p>
+          )}
+        </CardContent>
+      </Card>
+
+      {stats?.topDomains.length ? (
+        <Card className="glass mt-8">
+          <CardHeader>
+            <CardTitle>Top domains</CardTitle>
+          </CardHeader>
+          <CardContent>
+            <ul className="space-y-2">
+              {stats.topDomains.map((d) => (
+                <li
+                  key={d.domain}
+                  className="flex justify-between rounded-lg bg-white/5 px-3 py-2 text-sm"
+                >
+                  <span>{d.domain}</span>
+                  <span className="text-zinc-500">{d.count} scans</span>
+                </li>
+              ))}
+            </ul>
+          </CardContent>
+        </Card>
+      ) : null}
+    </div>
+  );
+}

src/app/api/analytics/stats/route.ts

@@ -0,0 +1,51 @@
+import { NextResponse } from "next/server";
+import { prisma } from "@/lib/prisma";
+
+export async function GET() {
+  const [total, completed, failed, last7] = await Promise.all([
+    prisma.scan.count(),
+    prisma.scan.count({ where: { status: "COMPLETED" } }),
+    prisma.scan.count({ where: { status: "FAILED" } }),
+    prisma.scan.findMany({
+      where: {
+        createdAt: { gte: new Date(Date.now() - 7 * 24 * 60 * 60 * 1000) },
+      },
+      select: { createdAt: true, status: true },
+      orderBy: { createdAt: "asc" },
+    }),
+  ]);
+
+  const byDay = new Map<string, { scans: number; completed: number }>();
+  for (const row of last7) {
+    const key = row.createdAt.toISOString().slice(0, 10);
+    const cur = byDay.get(key) ?? { scans: 0, completed: 0 };
+    cur.scans += 1;
+    if (row.status === "COMPLETED") cur.completed += 1;
+    byDay.set(key, cur);
+  }
+
+  const daily = [...byDay.entries()].map(([date, v]) => ({
+    date,
+    scans: v.scans,
+    completed: v.completed,
+  }));
+
+  const topDomains = await prisma.scan.groupBy({
+    by: ["domain"],
+    _count: { domain: true },
+    orderBy: { _count: { domain: "desc" } },
+    take: 8,
+  });
+
+  return NextResponse.json({
+    total,
+    completed,
+    failed,
+    successRate: total ? Math.round((completed / total) * 100) : 0,
+    daily,
+    topDomains: topDomains.map((d) => ({
+      domain: d.domain,
+      count: d._count.domain,
+    })),
+  });
+}

src/components/layout/header.tsx

@@ -12,6 +12,7 @@ import { ThemeToggle } from "@/components/theme-toggle";
 const links = [
   { href: "/dashboard", label: "Dashboard" },
   { href: "/monitoring", label: "Monitoring" },
+  { href: "/analytics", label: "Analytics" },
   { href: "/api-docs", label: "API" },
   { href: "/settings", label: "Settings" },
 ];