feat(distribution): 补齐退款加价回退、本站自卖与开通默认规则

退款时压缩卖方加价，人工/自动批次仅完结单可入账，号主收入进主站钱包；仲裁后重算释放并支持作废未入账 DS。开通时四种模式按默认生效，对外口径合并为 35/40/25，不再单独展示通道费。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/features/admin/api/adminDistribution.ts

@@ -94,9 +94,6 @@ export interface OnboardDistributionSitePayload {
   tax_enabled?: boolean
   tax_rate_bps?: number
   settlement_hold_days?: number
-  distributor_receive_ratio?: number
-  platform_sell_ratio?: number
-  service_fee_value?: number
 }
 
 export interface OnboardDistributionSiteResult {
@@ -254,6 +251,13 @@ export async function settleDistributionBatch(id: number) {
   return data.data
 }
 
+export async function cancelDistributionBatch(id: number) {
+  const { data } = await apiClient.post<ApiResponse<DistributionSettlementBatch>>(
+    `/admin/distribution/settlement-batches/${id}/cancel`
+  )
+  return data.data
+}
+
 export async function fetchDistributionSettlementItems(batchId: number) {
   const { data } = await apiClient.get<ApiResponse<{ items: DistributionSettlementItem[] }>>(
     `/admin/distribution/settlement-batches/${batchId}/items`