feat(products): edit support on /admin/products; Purchasing Items -> /inventory/items

- updateProduct server action (name + description, code locked)
- EditProductButton dialog in product-form.tsx
- Edit entry wired into ProductActionsMenu
- Sidebar Purchasing Items for Manager/Admin now points to /inventory/items (cart view)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

App/app/(portal)/admin/products/actions.ts

@@ -35,6 +35,29 @@ export async function createProduct(formData: FormData): Promise<ActionResult> {
   return { ok: true };
 }
 
+export async function updateProduct(formData: FormData): Promise<ActionResult> {
+  const session = await auth();
+  if (!session?.user || !hasPermission(session.user.role, "manage_products")) {
+    return { error: "Forbidden" };
+  }
+
+  const id = formData.get("id") as string;
+  if (!id) return { error: "Product ID required" };
+
+  const parsed = z.object({
+    name: z.string().min(1).max(200),
+    description: z.string().optional(),
+  }).safeParse({
+    name: formData.get("name"),
+    description: formData.get("description") || undefined,
+  });
+  if (!parsed.success) return { error: parsed.error.errors[0].message };
+
+  await db.product.update({ where: { id }, data: parsed.data });
+  revalidatePath("/admin/products");
+  return { ok: true };
+}
+
 export async function deleteProduct(id: string): Promise<ActionResult> {
   const session = await auth();
   if (!session?.user || !hasPermission(session.user.role, "manage_products")) return { error: "Forbidden" };

App/app/(portal)/admin/products/product-form.tsx

@@ -3,7 +3,7 @@
 import { useState } from "react";
 import { useRouter } from "next/navigation";
 import { AdminDialog } from "@/components/ui/admin-dialog";
-import { createProduct, toggleProductActive } from "./actions";
+import { createProduct, updateProduct, toggleProductActive } from "./actions";
 
 type ProductRow = {
   id: string;
@@ -78,6 +78,63 @@ export function AddProductButton() {
   );
 }
 
+export function EditProductButton({
+  product,
+  open: controlledOpen,
+  onOpenChange,
+}: {
+  product: ProductRow;
+  open?: boolean;
+  onOpenChange?: (v: boolean) => void;
+}) {
+  const router = useRouter();
+  const [internalOpen, setInternalOpen] = useState(false);
+  const [pending, setPending] = useState(false);
+  const [error, setError] = useState("");
+
+  const isControlled = controlledOpen !== undefined;
+  const open = isControlled ? controlledOpen : internalOpen;
+  const setOpen = isControlled ? (onOpenChange ?? (() => {})) : setInternalOpen;
+
+  async function handleSubmit(e: React.FormEvent<HTMLFormElement>) {
+    e.preventDefault();
+    setPending(true);
+    setError("");
+    const fd = new FormData(e.currentTarget);
+    fd.set("id", product.id);
+    const result = await updateProduct(fd);
+    if ("error" in result) { setError(result.error); setPending(false); }
+    else { setPending(false); setOpen(false); router.refresh(); }
+  }
+
+  return (
+    <>
+      {!isControlled && (
+        <button onClick={() => setOpen(true)}
+          className="rounded border border-primary-200 bg-primary-50 px-2.5 py-1 text-xs font-medium text-primary-700 hover:bg-primary-100 transition-colors">
+          Edit
+        </button>
+      )}
+      <AdminDialog title={`Edit — ${product.name}`} open={open} onClose={() => setOpen(false)}>
+        <form onSubmit={handleSubmit} className="space-y-4">
+          <ProductFormFields product={product} />
+          {error && <p className="text-sm text-danger-700 bg-danger-50 rounded-lg px-3 py-2">{error}</p>}
+          <div className="flex justify-end gap-3 pt-1">
+            <button type="button" onClick={() => setOpen(false)}
+              className="rounded-lg border border-neutral-300 px-4 py-2 text-sm font-medium text-neutral-700 hover:bg-neutral-50">
+              Cancel
+            </button>
+            <button type="submit" disabled={pending}
+              className="rounded-lg bg-primary-600 px-4 py-2 text-sm font-semibold text-white hover:bg-primary-700 disabled:opacity-60">
+              {pending ? "Saving…" : "Save Changes"}
+            </button>
+          </div>
+        </form>
+      </AdminDialog>
+    </>
+  );
+}
+
 export function ToggleProductButton({ product }: { product: ProductRow }) {
   const router = useRouter();
   const [toggling, setToggling] = useState(false);

App/app/(portal)/admin/products/products-table.tsx

@@ -5,7 +5,7 @@ import { useState } from "react";
 import { formatCurrency, formatDate } from "@/lib/utils";
 import { useTableControls } from "@/components/ui/use-table-controls";
 import { TableControls, SortableTh } from "@/components/ui/table-controls";
-import { AddProductButton } from "./product-form";
+import { AddProductButton, EditProductButton } from "./product-form";
 import { RowActionsMenu, RowActionsItem, RowActionsDestructiveItem, RowActionsSeparator } from "@/components/ui/row-actions-menu";
 import { DeleteConfirmDialog } from "@/components/ui/delete-confirm-dialog";
 import { ConfirmDialog } from "@/components/ui/confirm-dialog";
@@ -26,12 +26,14 @@ export type ProductRow = {
 const CHIPS = ["Active", "Inactive"];
 
 function ProductActionsMenu({ product }: { product: ProductRow }) {
+  const [editOpen, setEditOpen] = useState(false);
   const [deleteOpen, setDeleteOpen] = useState(false);
   const [toggleOpen, setToggleOpen] = useState(false);
 
   return (
     <>
       <RowActionsMenu>
+        <RowActionsItem onClick={() => setEditOpen(true)}>Edit</RowActionsItem>
         <RowActionsItem onClick={() => setToggleOpen(true)}>
           {product.isActive ? "Deactivate" : "Activate"}
         </RowActionsItem>
@@ -39,6 +41,11 @@ function ProductActionsMenu({ product }: { product: ProductRow }) {
         <RowActionsDestructiveItem onClick={() => setDeleteOpen(true)}>Delete</RowActionsDestructiveItem>
       </RowActionsMenu>
 
+      <EditProductButton
+        product={{ id: product.id, code: product.code, name: product.name, description: product.description, isActive: product.isActive }}
+        open={editOpen}
+        onOpenChange={setEditOpen}
+      />
       <DeleteConfirmDialog
         open={deleteOpen}
         onOpenChange={setDeleteOpen}

App/components/layout/sidebar.tsx

@@ -57,7 +57,7 @@ const PURCHASING_STAFF: NavItem[] = [
 // Manager / Admin catalogue management — Sites conditionally shown
 const PURCHASING_MGMT: NavItem[] = [
   { href: "/inventory/vendors", label: "Vendors",      icon: Store,   roles: ["MANAGER", "ADMIN"] },
-  { href: "/admin/products",    label: "Items",        icon: Package, roles: ["MANAGER", "ADMIN"] },
+  { href: "/inventory/items",   label: "Items",        icon: Package, roles: ["MANAGER", "ADMIN"] },
   { href: "/admin/vessels",     label: "Cost Centres", icon: Ship,    roles: ["MANAGER", "ADMIN"] },
   ...(INVENTORY_ENABLED
     ? [{ href: "/admin/sites", label: "Sites", icon: MapPin, roles: ["MANAGER", "ADMIN"] as Role[] }]