Ship Your Project in Days, Not Months

// 1. Define Schema with Zod
const productSchema = z.object({
  name: z.string().min(2, "Name is required"),
  price: z.coerce.number().min(0.01),
  category: z.enum(['electronics', 'clothing']),
  attributes: z.array(z.object({ key: z.string(), value: z.string() }))
});

type ProductForm = z.infer<typeof productSchema>;

// 2. Create Form
export function CreateProductForm() {
  const { register, handleSubmit, control, formState: { errors } } = useForm<ProductForm>({
    resolver: zodResolver(productSchema),
    defaultValues: { attributes: [] }
  });

  const onSubmit = (data: ProductForm) => {
    // 'data' matches API expected DTO exactly
    createProductMutation.mutate(data);
  };

  return (
    <form onSubmit={handleSubmit(onSubmit)} className="space-y-4">
      <Input label="Name" {...register('name')} error={errors.name?.message} />
      <SelectController control={control} name="category" options={CATEGORIES} />
      
      {/* Nested Field Array logic handles dynamic attributes... */}
      <Button type="submit" isLoading={isSubmitting}>Create Product</Button>
    </form>
  );
}

// Column definitions are fully typed based on your Row data
const columns: ColumnDef<Order>[] = [
  { 
    accessorKey: 'id',
    header: 'Order ID',
    cell: ({ getValue }) => <span className="font-mono">#{getValue()}</span> 
  },
  { 
    accessorKey: 'total',
    header: ({ column }) => <SortableHeader column={column} title="Amount" />,
    cell: ({ row }) => formatCurrency(row.getValue('total'))
  },
  {
    accessorKey: 'status',
    header: 'Status',
    cell: ({ row }) => <StatusBadge status={row.original.status} />
  },
  {
    id: 'actions',
    cell: ({ row }) => <RowActionsMenu order={row.original} />
  }
];

// Verify easy implementation
<DataTable
  columns={columns}
  data={orders}
  pageCount={pageCount}
  onPaginationChange={setPagination} // Server-side pagination ready
  onRowSelectionChange={setSelectedRows}
  toolbar={<OrdersToolbar />}
/>

// src/routes/app.tsx
export const appRoutes = [
  {
    path: '/admin',
    element: (
      // Protect entire admin section
      <AuthGuard requireRole="admin">
        <AdminLayout />
      </AuthGuard>
    ),
    children: [
      { path: 'dashboard', element: <Dashboard /> },
      { path: 'users', element: <UsersList /> }
    ]
  }
];

// AuthGuard Implementation (Simplified)
export function AuthGuard({ children, requireRole }: Props) {
  const { user, isAuthenticated, isLoading } = useAuth();
  const location = useLocation();

  if (isLoading) return <FullPageSpinner />;

  if (!isAuthenticated) {
    return <Navigate to="/login" state={{ from: location }} replace />;
  }

  if (requireRole && user.role !== requireRole) {
    return <Navigate to="/unauthorized" replace />;
  }

  return children;
}

export function ProjectsPage() {
  const { data, isLoading, isError, refetch } = useProjects();

  // The PageLayout handles the "boring" stuff so you focus on content
  return (
    <PageLayout
      title="Projects"
      subtitle="Manage your team's ongoing work"
      actions={<Button onClick={newProject}>+ New Project</Button>}
      
      // Automatic state handling
      isLoading={isLoading}
      loadingComponent={<ProjectsSkeleton />}
      
      isError={isError}
      errorComponent={<ErrorState onRetry={refetch} />}
      
      isEmpty={data?.length === 0}
      emptyComponent={
        <EmptyState 
          icon="folder" 
          title="No projects yet" 
          action={{ label: 'Create First Project', onClick: newProject }} 
        />
      }
    >
      {/* Only renders when data is ready */}
      <ProjectGrid projects={data} />
    </PageLayout>
  );
}