feat: implement product categories with tabbed filtering and admin configuration

shop/app/order/page.tsx

@@ -1,5 +1,5 @@
 import { createClient } from '@/lib/supabase/server'
-import { getProducts } from '@/lib/actions/products'
+import { getProducts, getCategories } from '@/lib/actions/products'
 import { OrderWizard } from '@/components/order-wizard'
 import { redirect } from 'next/navigation'
 import { Suspense } from 'react'
@@ -34,6 +34,7 @@ async function OrderDataWrapper() {
   }
 
   const products = await getProducts()
+  const categories = await getCategories()
   
   // Fetch profile if exists
   const { data: profile } = await supabase
@@ -42,5 +43,5 @@ async function OrderDataWrapper() {
     .eq('id', user.id)
     .single()
 
-  return <OrderWizard products={products} initialProfile={profile} />
+  return <OrderWizard products={products} categories={categories} initialProfile={profile} />
 }