fix(worker-platform): 拼单取消后可重入，大厅置顶始终优先

apps/backend/src/services/worker-platform/worker-hall-action-service.ts

@@ -174,6 +174,8 @@ function resolveWorkOrderShareJoinError(
     | 'sharing_disabled'
     | 'work_order_owner_conflict'
     | 'sharing_quantity_full'
+    | 'worker_share_exists'
+    | 'worker_share_locked'
     | 'worker_active_order_limit'
     | 'worker_deposit_insufficient'
     | null,
@@ -183,6 +185,8 @@ function resolveWorkOrderShareJoinError(
     sharing_disabled: '该订单未启用拼单',
     work_order_owner_conflict: '你已整单接取该订单，无需拼单',
     sharing_quantity_full: '拼单数量已满或超出剩余数量',
+    worker_share_exists: '你已参与该拼单，剩余份数可用「立即抢单」追加',
+    worker_share_locked: '你的拼单份额已提交或已验收，不能再追加份数',
     worker_active_order_limit: '已达到当前等级最大同时接单量',
     worker_deposit_insufficient: '余额不足，无法冻结所需押金',
   }

apps/backend/src/services/worker-platform/worker-platform-service.test.ts

@@ -20,6 +20,7 @@ import {
   resolveWorkOrderShareCancellationStatus,
   resolveWorkOrderShareDepositAmount,
   resolveWorkOrderSharingCancellationPlan,
+  resolveWorkOrderShareJoinMode,
   resolveWorkOrderShareJoinQuantity,
   resolveOpenSharingSyncReward,
 } from '../../repositories/worker-platform/index.js'
@@ -1660,6 +1661,60 @@ test('拼单份数全部承接后不再显示在抢单大厅', () => {
   assert.equal(isWorkOrderSharingFilled(false, 15, 15), false)
 })
 
+test('拼单份额取消后允许原打手重新加入', () => {
+  assert.equal(resolveWorkOrderShareJoinMode({ existingShareStatus: 'cancelled' }), 'rejoin')
+  assert.equal(
+    resolveWorkOrderShareJoinMode({ existingShareStatus: 'cancelled', takeRemaining: true }),
+    'rejoin',
+  )
+})
+
+test('拼单份额未提交时只有立即抢单可以追加份数', () => {
+  assert.equal(
+    resolveWorkOrderShareJoinMode({ existingShareStatus: 'joined', takeRemaining: true }),
+    'append',
+  )
+  assert.equal(resolveWorkOrderShareJoinMode({ existingShareStatus: 'joined' }), 'reject')
+})
+
+test('拼单份额已提交或已验收后不再允许追加份数', () => {
+  assert.equal(
+    resolveWorkOrderShareJoinMode({ existingShareStatus: 'submitted', takeRemaining: true }),
+    'reject',
+  )
+  assert.equal(
+    resolveWorkOrderShareJoinMode({ existingShareStatus: 'accepted', takeRemaining: true }),
+    'reject',
+  )
+})
+
+test('打手首次参与拼单时新建份额', () => {
+  assert.equal(resolveWorkOrderShareJoinMode({ existingShareStatus: null }), 'create')
+})
+
+test('取消的拼单份额重新加入必须复用原行并重置超时与验收状态', async () => {
+  const { readFile } = await import('node:fs/promises')
+  const shareRepoSrc = await readFile(
+    new URL('../../repositories/worker-platform/work-order-share-repo.ts', import.meta.url),
+    'utf8',
+  )
+  assert.ok(
+    shareRepoSrc.includes('resolveWorkOrderShareJoinMode'),
+    'joinWorkOrderShare 必须按份额状态区分新建、追加、重入与拒绝',
+  )
+  assert.ok(
+    shareRepoSrc.includes("status = 'joined',") &&
+      shareRepoSrc.includes('created_at = $5') &&
+      shareRepoSrc.includes('submitted_at = NULL') &&
+      shareRepoSrc.includes('accepted_at = NULL'),
+    '复用 cancelled 份额时必须重置 created_at（超时时钟）与验收时间，避免重入后立即被判超时',
+  )
+  assert.ok(
+    shareRepoSrc.includes('const currentFrozenDeposit = revivingCancelledShare'),
+    '取消份额的押金已退还，重新加入时必须按已有押金为 0 重新计算',
+  )
+})
+
 function buildWorkOrderRow(overrides: Partial<WorkOrderRow> = {}): WorkOrderRow {
   return {
     id: 1,
@@ -3092,6 +3147,25 @@ test('打手端「我的订单」必须走"先取 id 再取详情"的延迟分
   assert.ok(src.includes('rowsById.get(id)'), 'ANY() 不保证顺序，必须按 id 顺序还原分页结果')
 })
 
+test('大厅候选集必须优先保留置顶单，不能被容量上限挤出', async () => {
+  const { readFile } = await import('node:fs/promises')
+  const src = await readFile(
+    new URL('../../repositories/worker-platform/work-order-query-repo.ts', import.meta.url),
+    'utf8',
+  )
+  const start = src.indexOf('function buildHallCandidateIdsSql')
+  const hallSql = src.slice(start, start + 2600)
+  assert.equal(
+    (hallSql.match(/candidate\.pinned_at DESC NULLS LAST/g) || []).length,
+    2,
+    '主分类与子分类的窗口排名都必须优先置顶单',
+  )
+  assert.ok(
+    hallSql.includes('ranked.pinned_at DESC NULLS LAST'),
+    '最终候选集 LIMIT 前必须优先置顶单，否则置顶单会被新单挤出大厅',
+  )
+})
+
 test('打手等级筛选必须先把等级解析成打手 id，并用 UNION 形式（不能用 OR + IN 子查询）', async () => {
   const { readFile } = await import('node:fs/promises')
   const src = await readFile(