Add user lock/unlock functionality and remove partner management

shop/app/admin/einstellungen/page.tsx

@@ -1,5 +1,60 @@
+/* Updated Admin Settings without Partner Management */
 'use client';
 
+import { useState, useEffect } from 'react';
+import { Switch } from '@/components/ui/switch';
+import { Button } from '@/components/ui/button';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog';
+
+export default function AdminSettings() {
+  const [demoActive, setDemoActive] = useState(true);
+
+  useEffect(() => {
+    const state = localStorage.getItem('demo_banner_disabled') !== 'true';
+    setDemoActive(state);
+  }, []);
+
+  const toggleDemo = (checked: boolean) => {
+    setDemoActive(checked);
+    localStorage.setItem('demo_banner_disabled', (!checked).toString());
+    window.dispatchEvent(new Event('storage_demo_changed'));
+  };
+
+  return (
+    <div className="p-6 max-w-4xl mx-auto text-slate-900 dark:text-white space-y-8">
+      {/* Page Header */}
+      <div>
+        <h1 className="text-3xl font-extrabold tracking-tight">Admin Einstellungen</h1>
+        <p className="text-slate-500 dark:text-slate-400 text-sm mt-1">
+          Verwalten Sie globale Shopeinstellungen.
+        </p>
+      </div>
+
+      {/* Allgemeine Einstellungen */}
+      <div className="p-5 bg-white dark:bg-slate-900/50 rounded-xl border border-slate-200 dark:border-white/10 shadow-sm space-y-4">
+        <h2 className="text-lg font-bold">Allgemeine Einstellungen</h2>
+        <div className="flex items-center justify-between p-4 bg-slate-50 dark:bg-white/5 rounded-lg border border-slate-100 dark:border-white/5">
+          <div>
+            <p className="font-medium text-sm text-slate-900 dark:text-white">Demo-Warnmeldungen</p>
+            <p className="text-xs text-slate-500 dark:text-slate-400">Schaltet gelbe Banner ein oder aus.</p>
+          </div>
+          <Switch checked={demoActive} onCheckedChange={toggleDemo} />
+        </div>
+      </div>
+    </div>
+  );
+}
+
+
 import { useState, useEffect } from 'react';
 import { Switch } from '@/components/ui/switch';
 import { Button } from '@/components/ui/button';