Move Projekt-KIQ-HP bahn/ -> dhive/ (dhive project); add steering files

dhive/Projekt-KIQ-HP/src/components/ProtectedRoute.jsx

@@ -0,0 +1,28 @@
+import React from 'react';
+import { Navigate, useLocation } from 'react-router-dom';
+import { useAuth } from '../contexts/AuthContext';
+
+/**
+ * ProtectedRoute: checks session via AuthContext.
+ * allowedRoles: array of roles that can access this route.
+ * If no session, redirects to /login.
+ * If role set but not allowed, redirects to /.
+ */
+export default function ProtectedRoute({ children, allowedRoles }) {
+  const { session, role, loading } = useAuth();
+  const location = useLocation();
+
+  if (loading) {
+    return <div style={{ display: 'flex', justifyContent: 'center', alignItems: 'center', height: '100vh', color: '#00FF00', fontFamily: 'monospace' }}>Authentifizierung läuft...</div>;
+  }
+
+  if (!session) {
+    return <Navigate to="/login" state={{ from: location }} replace />;
+  }
+
+  if (allowedRoles && !allowedRoles.includes(role)) {
+    return <Navigate to="/" replace />;
+  }
+
+  return children;
+}