feat: rebrand to Domain Scanner platform

Replace GeoExport static site with Next.js domain intelligence app:
real DNS/WHOIS/SSL/HTTP/geo scans, SSE progress, Docker stack,
updated install/uninstall scripts, and full documentation.

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

src/app/monitoring/page.tsx

@@ -0,0 +1,79 @@
+"use client";
+
+import { useState } from "react";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Card, CardContent, CardHeader, CardTitle } from "@/components/ui/card";
+import { Bell, Plus } from "lucide-react";
+import { toast } from "sonner";
+
+export default function MonitoringPage() {
+  const [domain, setDomain] = useState("");
+  const [monitors, setMonitors] = useState<
+    { id: string; domain: string; type: string }[]
+  >([]);
+
+  const addMonitor = async () => {
+    const res = await fetch("/api/monitors", {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({ domain, type: "DNS" }),
+    });
+    if (res.status === 401) {
+      toast.error("Sign in to add monitors");
+      return;
+    }
+    if (!res.ok) {
+      toast.error("Could not create monitor");
+      return;
+    }
+    const data = await res.json();
+    setMonitors((m) => [...m, data.monitor]);
+    setDomain("");
+    toast.success("Monitor created (cron worker: roadmap)");
+  };
+
+  return (
+    <div className="mx-auto max-w-4xl px-4 pb-24 pt-24">
+      <h1 className="text-4xl font-bold">Monitoring</h1>
+      <p className="mt-2 text-zinc-400">
+        DNS and SSL change alerts — queue workers ship in v1.1.
+      </p>
+
+      <Card className="mt-8">
+        <CardHeader>
+          <CardTitle className="flex items-center gap-2">
+            <Bell className="h-5 w-5" /> Add monitor
+          </CardTitle>
+        </CardHeader>
+        <CardContent className="flex flex-col gap-3 sm:flex-row">
+          <Input
+            placeholder="domain.com"
+            value={domain}
+            onChange={(e) => setDomain(e.target.value)}
+          />
+          <Button onClick={addMonitor}>
+            <Plus className="h-4 w-4" /> Add
+          </Button>
+        </CardContent>
+      </Card>
+
+      {monitors.length === 0 ? (
+        <div className="mt-16 text-center">
+          <div className="mx-auto mb-4 flex h-16 w-16 items-center justify-center rounded-2xl bg-white/5">
+            <Bell className="h-8 w-8 text-zinc-600" />
+          </div>
+          <p className="text-zinc-500">No monitors yet. Add one to track DNS/SSL changes.</p>
+        </div>
+      ) : (
+        <ul className="mt-8 space-y-3">
+          {monitors.map((m) => (
+            <li key={m.id} className="glass rounded-xl px-4 py-3">
+              {m.domain} — {m.type}
+            </li>
+          ))}
+        </ul>
+      )}
+    </div>
+  );
+}