POL-124: Migrate frontend from React Native to Next.js web app

- Replace mobile/ (Expo) with web/ (Next.js 16 + Tailwind + shadcn/ui)
- Pages: login, register, pending, championships, championship detail, registrations, profile, admin
- Logic/view separated: hooks/ for data, components/ for UI, pages compose both
- Types in src/types/ (one interface per file)
- Auth: Zustand store + localStorage tokens + cookie presence flag for proxy
- API layer: axios client with JWT auto-refresh

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

web/src/app/(auth)/pending/page.tsx

@@ -0,0 +1,25 @@
+import Link from "next/link";
+import { Card, CardContent, CardHeader, CardTitle, CardDescription } from "@/components/ui/card";
+import { Button } from "@/components/ui/button";
+
+export default function PendingPage() {
+  return (
+    <Card className="text-center">
+      <CardHeader>
+        <div className="mx-auto mb-2 text-5xl">⏳</div>
+        <CardTitle className="text-2xl">Awaiting approval</CardTitle>
+        <CardDescription>
+          Your organizer account has been submitted. An admin will review it shortly.
+        </CardDescription>
+      </CardHeader>
+      <CardContent>
+        <p className="mb-6 text-sm text-gray-500">
+          Once approved you can log in and start creating championships.
+        </p>
+        <Button asChild variant="outline" className="w-full">
+          <Link href="/login">Back to login</Link>
+        </Button>
+      </CardContent>
+    </Card>
+  );
+}