mega-plant/app/(dashboard)/layout.tsx

import Link from "next/link";
import { LayoutDashboard, TrendingUp, Wrench, Wallet, LineChart as LineChartIcon, Receipt, Boxes } from "lucide-react";
import { Sidebar, MobileNav, type NavItem } from "@/components/Sidebar";
import { ThemeToggle } from "@/components/ThemeToggle";
import { GlobalSearch } from "@/components/GlobalSearch";
import { AccountMenu } from "@/components/AccountMenu";
import { getAssets } from "@/lib/server-data";
import { requireUser } from "@/lib/auth";

export const dynamic = "force-dynamic";

const navItems: NavItem[] = [
  {
    kind: "group",
    label: "Dashboard",
    icon: <LayoutDashboard className="w-4 h-4" />,
    children: [
      { href: "/", label: "Overview" },
      { href: "/sites", label: "Sites" },
    ],
  },
  {
    kind: "group",
    label: "Plant Register",
    icon: <Boxes className="w-4 h-4" />,
    children: [
      { href: "/plant", label: "Register" },
      { href: "/plant/map", label: "Plant Map" },
    ],
  },
  {
    kind: "group",
    label: "Income",
    icon: <TrendingUp className="w-4 h-4" />,
    children: [
      { href: "/income", label: "Overview" },
      // The invoice register is split in two by the debtor on the invoice — see
      // lib/invoice-party-policy.json. The two are SIBLING routes on purpose: a nested
      // path would satisfy isGroupActive's prefix test for both leaves at once and
      // highlight both at the same time.
      { href: "/income/invoices", label: "Internal Invoices" },
      { href: "/income/external-invoices", label: "External Invoices" },
    ],
  },
  // Running Costs became a group so Insurance could sit under it. The Overview
  // leaf stays at the EXISTING /running path — the current page becomes the
  // overview, it does not move, so no bookmark or GlobalSearch target breaks.
  {
    kind: "group",
    label: "Running Costs",
    icon: <Wrench className="w-4 h-4" />,
    children: [
      { href: "/running", label: "Overview" },
      { href: "/running/insurance", label: "Insurance" },
    ],
  },
  {
    kind: "group",
    label: "Expenses",
    icon: <Wallet className="w-4 h-4" />,
    children: [
      { href: "/expenses", label: "Overview" },
      { href: "/expenses/vehicles", label: "Vehicle Costs" },
      { href: "/expenses/finance", label: "Finance (Bastion)" },
      { href: "/expenses/personnel", label: "Personnel" },
      { href: "/expenses/subscriptions", label: "Subscriptions" },
      { href: "/expenses/rent", label: "Rent & Utilities" },
      { href: "/expenses/petty-cash", label: "Cash Floats" },
    ],
  },
  { kind: "link", href: "/overheads", label: "Overheads Roll-up", icon: <Receipt className="w-4 h-4" /> },
  { kind: "link", href: "/charts", label: "Machine Charts", icon: <LineChartIcon className="w-4 h-4" /> },
];

export default async function DashboardLayout({ children }: { children: React.ReactNode }) {
  const { user } = await requireUser();
  const assets = await getAssets();
  return <>
        {/* z-[1100], not z-30: Leaflet's control panes are z-index 1000 and
            live in the root stacking context, so the old z-30 header lost and
            the Plant Map scrolled straight over it. Must stay above 1000, and
            below the mobile nav drawer (z-[1200]) in Sidebar.tsx. */}
          <header className="sticky top-0 z-[1100] h-16 bg-white/80 dark:bg-bg/80 backdrop-blur border-b border-gray-200 dark:border-border">
            <div className="flex items-center gap-2 sm:gap-6 px-4 sm:px-6 h-full">
              {/* The hamburger must live HERE, in the full-bleed header — not in
                  the content flex row below, where it indented every page on
                  mobile. See MobileNav for the portal detail. */}
              <MobileNav items={navItems} />

              <Link href="/" className="flex items-center gap-2 shrink-0 min-h-11 min-w-11">
                <img
                  src="/brand/logo.png"
                  alt="Mega Plant"
                  className="w-9 h-9 rounded-xl object-contain bg-white dark:bg-bg shadow-sm"
                />
                <div className="leading-tight hidden sm:block">
                  <div className="text-sm font-semibold text-[#003D5B] dark:text-white">Mega Plant</div>
                  <div className="text-xs text-gray-500 dark:text-gray-400">Plant management</div>
                </div>
              </Link>

              <GlobalSearch assets={assets.map((a) => ({
                id: a.id, code: a.code, name: a.name, category: a.category, supplier: a.supplier,
              }))} />

              <div className="ml-auto flex items-center gap-2 sm:gap-3 shrink-0">
                <div className="hidden md:flex items-center gap-2 px-3 py-1.5 rounded-xl bg-gradient-to-br from-[#30638E] to-[#003D5B] text-white shadow-lg shadow-blue-900/20">
                  <span className="text-xs uppercase tracking-wider text-white/70">FY</span>
                  <span className="text-sm font-semibold">2026</span>
                </div>
                <div className="hidden sm:block"><ThemeToggle /></div>
                <AccountMenu name={typeof user.name === "string" ? user.name : ""} email={user.email} />
              </div>
            </div>
          </header>

          <div className="flex">
            <Sidebar items={navItems} />
            <main className="flex-1 min-w-0">{children}</main>
          </div>

  </>;
}