Initial commit: Rampart v0.2.0

Multi-layer DDoS protection for Minecraft servers.

- rampart-core: Edge node with XDP/eBPF + Rust L7 filtering
- rampart-manager: REST API with JWT auth, Redis sync
- rampart-cli: CLI tool for operators
- velocity-plugin: Domain check, HMAC verify, server registry, load balancer
- paper-plugin: Auto-registration, heartbeat, HMAC verify
- dashboard: React + Vite web UI for management

dashboard/src/App.tsx

@@ -0,0 +1,17 @@
+import { useState } from 'react'
+import Login from './components/Login'
+import Layout from './components/Layout'
+
+function App() {
+  const [token, setToken] = useState<string | null>(
+    () => sessionStorage.getItem('rampart_token')
+  )
+
+  if (!token) {
+    return <Login onLogin={(t) => setToken(t)} />
+  }
+
+  return <Layout />
+}
+
+export default App