fixed errors in branding and invite page, added an error route for better react error display

resources/js/components/RouteErrorElement.tsx

@@ -0,0 +1,50 @@
+import React from 'react';
+import { isRouteErrorResponse, useNavigate, useRouteError } from 'react-router-dom';
+import { AlertTriangle, RotateCcw } from 'lucide-react';
+
+import { Button } from '@/components/ui/button';
+
+export function RouteErrorElement(): React.ReactElement {
+  const error = useRouteError();
+  const navigate = useNavigate();
+
+  const statusText = (() => {
+    if (isRouteErrorResponse(error)) {
+      return `${error.status} ${error.statusText}`;
+    }
+    if (error instanceof Error) {
+      return error.message;
+    }
+    return 'Unerwarteter Fehler';
+  })();
+
+  return (
+    <div className="flex min-h-screen items-center justify-center bg-slate-50 px-4 py-10 text-slate-900 dark:bg-slate-950 dark:text-slate-50">
+      <div className="w-full max-w-lg rounded-2xl border border-slate-200 bg-white p-6 shadow-lg dark:border-slate-800 dark:bg-slate-900">
+        <div className="flex items-center gap-3">
+          <div className="flex h-10 w-10 items-center justify-center rounded-full bg-amber-100 text-amber-700 dark:bg-amber-900/40 dark:text-amber-200">
+            <AlertTriangle className="h-5 w-5" />
+          </div>
+          <div>
+            <p className="text-sm font-semibold text-slate-900 dark:text-slate-50">Unerwarteter Fehler</p>
+            <p className="text-xs text-slate-600 dark:text-slate-300">{statusText}</p>
+          </div>
+        </div>
+        <p className="mt-4 text-sm text-slate-700 dark:text-slate-200">
+          Etwas ist schiefgelaufen. Du kannst es erneut versuchen oder zur letzten Seite zurückkehren.
+        </p>
+        <div className="mt-5 flex flex-wrap gap-2">
+          <Button variant="outline" onClick={() => navigate(-1)}>
+            Zurück
+          </Button>
+          <Button onClick={() => window.location.reload()}>
+            <RotateCcw className="mr-2 h-4 w-4" /> Neu laden
+          </Button>
+        </div>
+      </div>
+    </div>
+  );
+}
+
+export default RouteErrorElement;
+