feat(admin): move allow_update_discount option to product level

shop/components/admin/create-product-dialog.tsx

@@ -61,6 +61,7 @@ const productSchema = z.object({
   requirements: z.array(z.string()).default([]),
   exclusions: z.array(z.string()).default([]),
   modules: z.array(moduleSchema).default([]),
+  allow_update_discount: z.boolean().default(true),
 })
 
 type ProductFormValues = z.infer<typeof productSchema>
@@ -93,6 +94,7 @@ export function CreateProductDialog({
       show_in_abo: product ? (product.show_in_abo ?? true) : true,
       requirements: product?.requirements || [],
       exclusions: product?.exclusions || [],
+      allow_update_discount: product ? (product.allow_update_discount ?? true) : true,
       modules: product?.modules?.map(m => ({
         id: m.id,
         name: m.name,
@@ -277,6 +279,30 @@ export function CreateProductDialog({
                   />
                 </div>
 
+                {form.watch('billing_interval') === 'one_time' && (
+                  <FormField
+                    control={form.control}
+                    name="allow_update_discount"
+                    render={({ field }) => (
+                      <FormItem className="flex flex-row items-start space-x-3 space-y-0 rounded-md border p-4 bg-slate-50 dark:bg-white/5 border-slate-200 dark:border-white/10">
+                        <FormControl>
+                          <Checkbox
+                            checked={field.value}
+                            onCheckedChange={field.onChange}
+                          />
+                        </FormControl>
+                        <div className="space-y-1 leading-none">
+                          <FormLabel className="text-slate-900 dark:text-white font-medium cursor-pointer">Update-Rabatt erlauben</FormLabel>
+                          <FormDescription className="text-xs text-slate-500">
+                            Kunden erhalten für dieses Produkt den selektiven Update-Rabatt.
+                          </FormDescription>
+                        </div>
+                      </FormItem>
+                    )}
+                  />
+                )}
+
+
                 <FormField
                   control={form.control}
                   name="description"