feat: optimize tenant admin view and enhance user list with dynamic columns and metadata search

adminfront/src/components/auth/RoleGuard.tsx

@@ -0,0 +1,36 @@
+import * as React from "react";
+import { useQuery } from "@tanstack/react-query";
+import { fetchMe } from "../../lib/adminApi";
+
+interface RoleGuardProps {
+  children: React.ReactNode;
+  roles: string[];
+  fallback?: React.ReactNode;
+}
+
+/**
+ * RoleGuard conditionally renders children based on the current user's role.
+ * 
+ * Usage:
+ * <RoleGuard roles={['super_admin']}>
+ *   <button>System Only Action</button>
+ * </RoleGuard>
+ */
+export function RoleGuard({ children, roles, fallback = null }: RoleGuardProps) {
+  const { data: profile, isLoading } = useQuery({
+    queryKey: ["me"],
+    queryFn: fetchMe,
+    staleTime: 5 * 60 * 1000, // 5 minutes
+  });
+
+  if (isLoading) return null;
+
+  const userRole = profile?.role || "user";
+  const hasAccess = roles.includes(userRole);
+
+  if (!hasAccess) {
+    return <>{fallback}</>;
+  }
+
+  return <>{children}</>;
+}