接单平台新增拼单与取消接单能力

拼单功能：
- 工单/物品规则支持拼单配置（启用、总数量、单价），总价=单价×数量三方联动，启用拼单时工单金额自动同步拼单总价
- 拼单参与按数量冻结比例押金，验收通过后按份额结算报酬，升级统计按数量计入
- 抢单大厅拼单入口：紫色渐变大按钮带单价展示，拼单进度/剩余份数，弹窗输入数量实时预估报酬与押金
- 我的订单展示拼单份额（数量×单价、状态），拼单者各自提交验收，全部提交后管理员统一验收
- 新增 work_order_shares 表与迁移 008

取消接单：
- 进行中订单可取消（押金全额退还、工单回大厅），30 天内限 5 次防滥用

apps/frontend/src/services/admin/worker-platform.ts

@@ -2,6 +2,7 @@ import { apiDelete, apiGet, apiPost } from '@/lib/http'
 import type {
   WorkCategory,
   WorkOrder,
+  WorkOrderShare,
   WorkProductRule,
   WorkerFinanceConfig,
   WorkerFinanceRequest,
@@ -97,6 +98,10 @@ export function saveAdminWorkProductRule(payload: {
   rewardAmount?: number
   requiredDepositAmount?: number
   depositThresholdAmount?: number
+  sharingEnabled?: boolean
+  sharingTotalQuantity?: number
+  sharingUnitReward?: number
+  sharingTotalAmount?: number
   fieldsText?: string
   sortOrder?: number
 }) {
@@ -217,6 +222,27 @@ export function unpublishAdminWorkOrder(workOrderId: number) {
   )
 }
 
+export function fetchAdminWorkOrderSharing(workOrderId: number) {
+  return apiGet<{ order: WorkOrder; shares: WorkOrderShare[] }>(
+    `/api/v1/admin/worker-platform/orders/${workOrderId}/sharing`,
+  )
+}
+
+export function updateAdminWorkOrderSharing(
+  workOrderId: number,
+  payload: {
+    enabled: boolean
+    totalQuantity: number
+    unitReward: number
+    totalAmount?: number
+  },
+) {
+  return apiPost<{ order: WorkOrder }>(
+    `/api/v1/admin/worker-platform/orders/${workOrderId}/sharing`,
+    payload,
+  )
+}
+
 export function markAdminWorkOrderProblem(workOrderId: number, note: string) {
   return apiPost<{ order: WorkOrder }>(
     `/api/v1/admin/worker-platform/orders/${workOrderId}/problem`,