plane/web/layouts/admin-layout/header.tsx

import { FC } from "react";
// next
import Link from "next/link";
// mobx
import { observer } from "mobx-react-lite";
// ui
import { Breadcrumbs } from "@plane/ui";
// mobx store
import { useMobxStore } from "lib/mobx/store-provider";
// icons
import { ArrowLeftToLine, Settings } from "lucide-react";

export const InstanceAdminHeader: FC = observer(() => {
  const {
    workspace: { workspaceSlug },
    user: { currentUserSettings },
  } = useMobxStore();

  const redirectWorkspaceSlug =
    workspaceSlug ||
    currentUserSettings?.workspace?.last_workspace_slug ||
    currentUserSettings?.workspace?.fallback_workspace_slug ||
    "";

  return (
    <div className="relative flex w-full flex-shrink-0 flex-row z-10 h-[3.75rem] items-center justify-between gap-x-2 gap-y-4 border-b border-custom-border-200 bg-custom-sidebar-background-100 p-4">
      <div className="flex items-center gap-2 flex-grow w-full whitespace-nowrap overflow-ellipsis">
        <div>
          <Breadcrumbs>
            <Breadcrumbs.BreadcrumbItem
              type="text"
              icon={<Settings className="h-4 w-4 text-custom-text-300" />}
              label="General"
            />
          </Breadcrumbs>
        </div>
      </div>
      <div className="flex-shrink-0">
        <Link href={redirectWorkspaceSlug}>
          <a>
            <ArrowLeftToLine className="h-4 w-4 text-custom-text-300" />
          </a>
        </Link>
      </div>
    </div>
  );
});