feat: Add quantity support for product modules, multiply prices in order snapshot and pdf

shop/lib/actions/orders.ts

@@ -50,6 +50,7 @@ function hashOrderSnapshot(snapshot: object): string {
  */
 export async function submitOrder(params: {
   selections: WizardSelections
+  moduleQuantities?: Record<string, number>
   products?: Product[]
   categories?: Category[]
   customerProfile: Partial<Profile>
@@ -57,7 +58,7 @@ export async function submitOrder(params: {
   endCustomer?: EndCustomer | null
   billingInterval?: 'one_time' | 'monthly'
 }): Promise<Order> {
-  const { selections, customerProfile, endCustomerId, endCustomer, billingInterval } = params
+  const { selections, moduleQuantities, customerProfile, endCustomerId, endCustomer, billingInterval } = params
   const supabase = await createClient()
 
   const { data: { user } } = await supabase.auth.getUser()
@@ -106,7 +107,7 @@ export async function submitOrder(params: {
   // 1. Snapshots aufbauen
   // Wenn Endkunde vorhanden: dessen Daten einfrieren; sonst Partner-Profil (Fallback)
   const customerSnapshot = buildCustomerSnapshot(customerProfile, endCustomer ?? null)
-  const orderSnapshot = buildOrderSnapshot(selections, dbProducts, dbCategories, billingInterval)
+  const orderSnapshot = buildOrderSnapshot(selections, dbProducts, dbCategories, billingInterval, moduleQuantities)
 
   // 2. Idempotenz-Guard: Prüfen ob identische Bestellung in den letzten 30s existiert
   const orderHash = hashOrderSnapshot(orderSnapshot)

shop/lib/actions/products.ts

@@ -89,6 +89,7 @@ export async function createProduct(
       price: m.price,
       requirements: m.requirements || [],
       exclusions: m.exclusions || [],
+      has_quantity: m.has_quantity ?? false,
     }))
     const { error: modulesError } = await supabase
       .from('product_modules')
@@ -125,6 +126,7 @@ export async function updateProduct(id: string, product: Partial<Product>, modul
       price: m.price,
       requirements: m.requirements || [],
       exclusions: m.exclusions || [],
+      has_quantity: m.has_quantity ?? false,
     }))
     const { error: modulesError } = await supabase
       .from('product_modules')