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/backend/src/routes/admin/worker-platform.ts

@@ -8,6 +8,7 @@ import {
   deleteAdminWorkerLevel,
   getAdminWorkerFinanceConfig,
   getAdminWorkerPlatformSummary,
+  getAdminWorkOrderSharing,
   listAdminWorkerFinanceRequests,
   listAdminWorkCategories,
   listAdminWorkProductRules,
@@ -26,6 +27,7 @@ import {
   submitAdminWorkOrderMaterial,
   syncAdminWorkerOrdersFromSource,
   unpublishAdminWorkOrder,
+  updateAdminWorkOrderSharing,
 } from '../../services/worker-platform/worker-platform-service.js'
 import { createJsonHandler, requireAdminRoles } from './session.js'
 
@@ -349,6 +351,35 @@ router.post(
   }),
 )
 
+router.get(
+  '/worker-platform/orders/:workOrderId/sharing',
+  requireAdminRoles(['admin', 'operator', 'support']),
+  createJsonHandler((req) => getAdminWorkOrderSharing(String(req.params.workOrderId || '')), {
+    successMessage: 'ok',
+    errorMessage: '读取拼单信息失败',
+    scope: '[admin/worker-platform/orders/:workOrderId/sharing]',
+  }),
+)
+
+router.post(
+  '/worker-platform/orders/:workOrderId/sharing',
+  requireAdminRoles(['admin', 'operator']),
+  createJsonHandler(
+    (req) => updateAdminWorkOrderSharing(String(req.params.workOrderId || ''), req.body || {}),
+    {
+      successMessage: '拼单配置已保存',
+      errorMessage: '保存拼单配置失败',
+      scope: '[admin/worker-platform/orders/:workOrderId/sharing]',
+      audit: (req, data) => ({
+        action: 'work_order_sharing_config_updated',
+        targetType: 'work_order',
+        targetId: String(req.params.workOrderId || ''),
+        data: data && typeof data === 'object' ? (data as Record<string, unknown>) : {},
+      }),
+    },
+  ),
+)
+
 router.post(
   '/worker-platform/orders/:workOrderId/problem',
   requireAdminRoles(['admin', 'operator', 'support']),

apps/backend/src/routes/worker.ts

@@ -4,12 +4,14 @@ import { createRateLimitMiddleware, getBodyFieldRateLimitKey } from '../middlewa
 import { uploadSingleFile } from './file-upload.js'
 import { uploadFileAsset } from '../services/file-storage/file-storage-service.js'
 import {
+  cancelWorkerOrder,
   changeWorkerPassword,
   createWorkerRechargeRequest,
   createWorkerWithdrawRequest,
   getWorkerProfile,
   getWorkerSessionSummary,
   grabWorkerHallOrder,
+  joinWorkerSharingOrder,
   listWorkerProfileFinanceRequests,
   listWorkerProfileWalletLedgers,
   listWorkerHallOrders,
@@ -182,6 +184,24 @@ router.post(
   ),
 )
 
+router.post(
+  '/hall/orders/:workOrderId/join-sharing',
+  requireActiveWorker,
+  createRouteHandler(
+    (req) =>
+      joinWorkerSharingOrder(
+        String(req.params.workOrderId || ''),
+        req.body || {},
+        getRequiredWorkerSession(req),
+      ),
+    {
+      successMessage: '拼单成功',
+      errorMessage: '拼单失败',
+      scope: '[worker/hall/orders/:workOrderId/join-sharing]',
+    },
+  ),
+)
+
 router.get(
   '/orders',
   requireActiveWorker,
@@ -210,6 +230,19 @@ router.post(
   ),
 )
 
+router.post(
+  '/orders/:workOrderId/cancel',
+  requireActiveWorker,
+  createRouteHandler(
+    (req) => cancelWorkerOrder(String(req.params.workOrderId || ''), getRequiredWorkerSession(req)),
+    {
+      successMessage: '已取消接单',
+      errorMessage: '取消接单失败',
+      scope: '[worker/orders/:workOrderId/cancel]',
+    },
+  ),
+)
+
 router.use((req, res) => {
   res.status(404).json(buildNotFoundPayload(req))
 })