feat(shop): move linked fee configuration to product level

shop/lib/actions/products.ts

@@ -9,7 +9,7 @@ export async function getProducts() {
   const supabase = await createClient()
   const { data, error } = await supabase
     .from('products')
-    .select('*, category:categories(*), modules:product_modules!product_modules_product_id_fkey(*)')
+    .select('*, category:categories(*), modules:product_modules(*)')
     .order('created_at', { ascending: false })
 
   if (error) throw error
@@ -90,7 +90,6 @@ export async function createProduct(
       requirements: m.requirements || [],
       exclusions: m.exclusions || [],
       has_quantity: m.has_quantity ?? false,
-      linked_fee_product_id: m.linked_fee_product_id || null,
     }))
     const { error: modulesError } = await supabase
       .from('product_modules')
@@ -128,7 +127,6 @@ export async function updateProduct(id: string, product: Partial<Product>, modul
       requirements: m.requirements || [],
       exclusions: m.exclusions || [],
       has_quantity: m.has_quantity ?? false,
-      linked_fee_product_id: m.linked_fee_product_id || null,
     }))
     const { error: modulesError } = await supabase
       .from('product_modules')

shop/lib/types.ts

@@ -18,6 +18,7 @@ export type Product = {
   requirements?: string[]
   exclusions?: string[]
   allow_update_discount?: boolean
+  linked_fee_product_id?: string | null
 }
 
 export type Category = {
@@ -46,7 +47,6 @@ export type ProductModule = {
   exclusions: string[]     // UUID[] von Modulen, die nicht gleichzeitig aktiv sein dürfen
   created_at: string
   has_quantity?: boolean
-  linked_fee_product_id?: string | null
 }
 
 export type Profile = {