新增打手撤单审核

apps/backend/src/db/migrations/043_worker_cancel_requests.sql

@@ -0,0 +1,32 @@
+-- 打手撤单申请：提交后由客服审核，审核通过才执行撤单与处罚。
+
+ALTER TABLE worker_users
+  ADD COLUMN IF NOT EXISTS level_penalty_accepted_count INTEGER NOT NULL DEFAULT 0;
+
+CREATE TABLE IF NOT EXISTS worker_order_cancel_requests (
+  id BIGSERIAL PRIMARY KEY,
+  work_order_id BIGINT NOT NULL REFERENCES work_orders(id) ON DELETE CASCADE,
+  work_order_share_id BIGINT REFERENCES work_order_shares(id) ON DELETE SET NULL,
+  worker_id BIGINT NOT NULL REFERENCES worker_users(id) ON DELETE CASCADE,
+  reason TEXT NOT NULL DEFAULT '',
+  status TEXT NOT NULL DEFAULT 'pending',
+  review_note TEXT NOT NULL DEFAULT '',
+  reviewed_by TEXT NOT NULL DEFAULT '',
+  level_before_id BIGINT REFERENCES worker_levels(id) ON DELETE SET NULL,
+  created_at TIMESTAMPTZ NOT NULL,
+  reviewed_at TIMESTAMPTZ,
+  updated_at TIMESTAMPTZ NOT NULL
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS idx_worker_cancel_requests_pending_target
+  ON worker_order_cancel_requests (work_order_id, worker_id, COALESCE(work_order_share_id, 0))
+  WHERE status = 'pending';
+
+CREATE INDEX IF NOT EXISTS idx_worker_cancel_requests_worker_created
+  ON worker_order_cancel_requests (worker_id, created_at DESC);
+
+CREATE INDEX IF NOT EXISTS idx_worker_cancel_requests_status_created
+  ON worker_order_cancel_requests (status, created_at DESC);
+
+COMMENT ON COLUMN worker_users.level_penalty_accepted_count IS '撤单处罚扣减的有效验收次数，不删除真实历史订单';
+COMMENT ON TABLE worker_order_cancel_requests IS '打手发起、客服审核的撤单申请';

apps/backend/src/repositories/worker-platform/types.ts

@@ -30,6 +30,7 @@ export type WorkerUserRow = {
   level_key?: string
   level_name?: string
   level_permission_json?: string | Record<string, unknown>
+  level_penalty_accepted_count?: number
   available_amount?: number
   frozen_deposit_amount?: number
   pending_unfreeze_amount?: number
@@ -66,6 +67,26 @@ export type WorkerWalletRow = {
   updated_at: string
 }
 
+export type WorkerCancelRequestRow = {
+  id: number
+  work_order_id: number
+  work_order_share_id: number | null
+  worker_id: number
+  reason: string
+  status: string
+  review_note: string
+  reviewed_by: string
+  level_before_id: number | null
+  created_at: string
+  reviewed_at: string | null
+  updated_at: string
+  work_order_no?: string
+  product_name?: string
+  worker_username?: string
+  worker_display_name?: string
+  share_quantity?: number | null
+}
+
 export type WorkerDepositUnfreezeRow = {
   id: number
   worker_id: number

apps/backend/src/repositories/worker-platform/work-order-repo.ts

@@ -13,6 +13,7 @@ import type {
   ProductRuleListInput,
   WorkCategoryRow,
   WorkerDepositUnfreezeRow,
+  WorkerCancelRequestRow,
   WorkOrderRow,
   WorkOrderShareRow,
   WorkOrderStatistics,
@@ -59,6 +60,20 @@ const WORK_ORDER_SHARE_SELECT = `
   LEFT JOIN worker_users wu ON wu.id = wos.worker_id
 `
 
+const WORKER_CANCEL_REQUEST_SELECT = `
+  SELECT
+    cr.*,
+    wo.work_order_no,
+    wo.product_name,
+    wu.username AS worker_username,
+    wu.display_name AS worker_display_name,
+    wos.quantity AS share_quantity
+  FROM worker_order_cancel_requests cr
+  INNER JOIN work_orders wo ON wo.id = cr.work_order_id
+  INNER JOIN worker_users wu ON wu.id = cr.worker_id
+  LEFT JOIN work_order_shares wos ON wos.id = cr.work_order_share_id
+`
+
 type WorkerOrderOverviewRow = {
   status: string
   order_count: number
@@ -1707,6 +1722,413 @@ export async function cancelWorkerWorkOrder(input: {
   })
 }
 
+/** 打手提交撤单申请；待审核期间订单与押金均保持原状。 */
+export async function createWorkerCancelRequest(input: {
+  workOrderId: number
+  workerId: number
+  reason: string
+  now: string
+}): Promise<{
+  request: WorkerCancelRequestRow | null
+  dailyUsed: number
+  failureReason:
+    | 'work_order_not_cancellable'
+    | 'work_order_owner_required'
+    | 'share_not_cancellable'
+    | 'request_pending'
+    | 'daily_limit_reached'
+    | null
+}> {
+  return withTransaction(async (client) => {
+    const orderResult = await client.query<WorkOrderRow>(
+      'SELECT * FROM work_orders WHERE id = $1 FOR UPDATE',
+      [input.workOrderId],
+    )
+    const workOrder = orderResult.rows[0] || null
+    if (!workOrder) {
+      return { request: null, dailyUsed: 0, failureReason: 'work_order_not_cancellable' }
+    }
+
+    let shareId: number | null = null
+    if (workOrder.sharing_enabled === true) {
+      const shareResult = await client.query<WorkOrderShareRow>(
+        `SELECT * FROM work_order_shares
+         WHERE work_order_id = $1 AND worker_id = $2
+         FOR UPDATE`,
+        [input.workOrderId, input.workerId],
+      )
+      const share = shareResult.rows[0] || null
+      if (!share || !resolveWorkOrderShareCancellationStatus(workOrder.status, share.status)) {
+        return { request: null, dailyUsed: 0, failureReason: 'share_not_cancellable' }
+      }
+      shareId = Number(share.id)
+    } else if (
+      workOrder.status !== 'in_progress' ||
+      Number(workOrder.assigned_worker_id || 0) !== input.workerId
+    ) {
+      return {
+        request: null,
+        dailyUsed: 0,
+        failureReason: workOrder.assigned_worker_id
+          ? 'work_order_not_cancellable'
+          : 'work_order_owner_required',
+      }
+    }
+
+    const dailyResult = await client.query<{ total: number }>(
+      `SELECT COUNT(*)::int AS total
+       FROM worker_order_cancel_requests
+       WHERE worker_id = $1
+         AND status IN ('pending', 'approved')
+         AND created_at >= date_trunc('day', $2::timestamptz AT TIME ZONE 'Asia/Shanghai') AT TIME ZONE 'Asia/Shanghai'`,
+      [input.workerId, input.now],
+    )
+    const dailyUsed = Number(dailyResult.rows[0]?.total || 0)
+    if (dailyUsed >= 5) {
+      return { request: null, dailyUsed, failureReason: 'daily_limit_reached' }
+    }
+
+    const pendingResult = await client.query<{ id: number }>(
+      `SELECT id FROM worker_order_cancel_requests
+       WHERE work_order_id = $1
+         AND worker_id = $2
+         AND COALESCE(work_order_share_id, 0) = $3
+         AND status = 'pending'
+       LIMIT 1`,
+      [input.workOrderId, input.workerId, shareId || 0],
+    )
+    if (pendingResult.rows[0]) {
+      return { request: null, dailyUsed, failureReason: 'request_pending' }
+    }
+
+    const created = await client.query<{ id: number }>(
+      `INSERT INTO worker_order_cancel_requests (
+         work_order_id, work_order_share_id, worker_id, reason, status, created_at, updated_at
+       ) VALUES ($1, $2, $3, $4, 'pending', $5, $5)
+       RETURNING id`,
+      [input.workOrderId, shareId, input.workerId, input.reason, input.now],
+    )
+    const requestId = Number(created.rows[0]?.id || 0)
+    await createWorkOrderEventWithClient(client, {
+      workOrderId: input.workOrderId,
+      actorType: 'worker',
+      actorId: String(input.workerId),
+      eventType: 'cancel_request_submitted',
+      fromStatus: workOrder.status,
+      toStatus: workOrder.status,
+      payloadJson: JSON.stringify({ requestId, shareId, reason: input.reason }),
+      now: input.now,
+    })
+    return {
+      request: await getWorkerCancelRequestByIdWithClient(client, requestId),
+      dailyUsed: dailyUsed + 1,
+      failureReason: null,
+    }
+  })
+}
+
+export async function listWorkerCancelRequests(
+  workerId: number | string,
+): Promise<WorkerCancelRequestRow[]> {
+  const result = await query<WorkerCancelRequestRow>(
+    `${WORKER_CANCEL_REQUEST_SELECT}
+     WHERE cr.worker_id = $1
+     ORDER BY cr.id DESC
+     LIMIT 100`,
+    [Number(workerId)],
+  )
+  return result.rows
+}
+
+export async function listAdminWorkerCancelRequests(
+  status = 'pending',
+): Promise<WorkerCancelRequestRow[]> {
+  const result = await query<WorkerCancelRequestRow>(
+    `${WORKER_CANCEL_REQUEST_SELECT}
+     WHERE ($1 = '' OR cr.status = $1)
+     ORDER BY cr.id DESC
+     LIMIT 200`,
+    [status],
+  )
+  return result.rows
+}
+
+export async function getWorkerCancelRequestRisk(workerId: number | string, now: string) {
+  const result = await query<{ daily_used: number; approved_total: number }>(
+    `SELECT
+       COUNT(*) FILTER (
+         WHERE status IN ('pending', 'approved')
+           AND created_at >= date_trunc('day', $2::timestamptz AT TIME ZONE 'Asia/Shanghai') AT TIME ZONE 'Asia/Shanghai'
+       )::int AS daily_used,
+       COUNT(*) FILTER (WHERE status = 'approved')::int AS approved_total
+     FROM worker_order_cancel_requests
+     WHERE worker_id = $1`,
+    [Number(workerId), now],
+  )
+  const row = result.rows[0]
+  const approvedTotal = Number(row?.approved_total || 0)
+  const nextPenaltyAt = Math.ceil((approvedTotal + 1) / 10) * 10
+  return {
+    dailyUsed: Number(row?.daily_used || 0),
+    dailyLimit: 5,
+    approvedTotal,
+    nextPenaltyAt,
+    remainingToPenalty: Math.max(0, nextPenaltyAt - approvedTotal),
+  }
+}
+
+/** 客服审核通过时在同一事务内撤单、退押金并执行等级处罚。 */
+export async function reviewWorkerCancelRequest(input: {
+  requestId: number
+  approved: boolean
+  reviewNote: string
+  actorName: string
+  now: string
+}): Promise<{
+  request: WorkerCancelRequestRow | null
+  order: WorkOrderRow | null
+  releasedDepositAmount: number
+  levelChanged: boolean
+  accountDisabled: boolean
+  failureReason: 'request_not_found' | 'request_not_pending' | 'target_state_changed' | null
+}> {
+  return withTransaction(async (client) => {
+    const requestResult = await client.query<WorkerCancelRequestRow>(
+      'SELECT * FROM worker_order_cancel_requests WHERE id = $1 FOR UPDATE',
+      [input.requestId],
+    )
+    const request = requestResult.rows[0] || null
+    if (!request) {
+      return {
+        request: null,
+        order: null,
+        releasedDepositAmount: 0,
+        levelChanged: false,
+        accountDisabled: false,
+        failureReason: 'request_not_found',
+      }
+    }
+    if (request.status !== 'pending') {
+      return {
+        request: await getWorkerCancelRequestByIdWithClient(client, request.id),
+        order: null,
+        releasedDepositAmount: 0,
+        levelChanged: false,
+        accountDisabled: false,
+        failureReason: 'request_not_pending',
+      }
+    }
+
+    const workOrderResult = await client.query<WorkOrderRow>(
+      'SELECT * FROM work_orders WHERE id = $1 FOR UPDATE',
+      [request.work_order_id],
+    )
+    const workOrder = workOrderResult.rows[0] || null
+    if (!workOrder) {
+      return {
+        request: null,
+        order: null,
+        releasedDepositAmount: 0,
+        levelChanged: false,
+        accountDisabled: false,
+        failureReason: 'target_state_changed',
+      }
+    }
+
+    if (!input.approved) {
+      await client.query(
+        `UPDATE worker_order_cancel_requests
+         SET status = 'rejected', review_note = $1, reviewed_by = $2, reviewed_at = $3, updated_at = $3
+         WHERE id = $4`,
+        [input.reviewNote, input.actorName, input.now, request.id],
+      )
+      await createWorkOrderEventWithClient(client, {
+        workOrderId: Number(workOrder.id),
+        actorType: 'admin',
+        actorId: input.actorName,
+        eventType: 'cancel_request_rejected',
+        fromStatus: workOrder.status,
+        toStatus: workOrder.status,
+        payloadJson: JSON.stringify({ requestId: request.id, note: input.reviewNote }),
+        now: input.now,
+      })
+      return {
+        request: await getWorkerCancelRequestByIdWithClient(client, request.id),
+        order: await getWorkOrderByIdWithClient(client, workOrder.id),
+        releasedDepositAmount: 0,
+        levelChanged: false,
+        accountDisabled: false,
+        failureReason: null,
+      }
+    }
+
+    let releasedDepositAmount = 0
+    if (request.work_order_share_id) {
+      const shareResult = await client.query<WorkOrderShareRow>(
+        `SELECT * FROM work_order_shares WHERE id = $1 AND work_order_id = $2 FOR UPDATE`,
+        [request.work_order_share_id, request.work_order_id],
+      )
+      const share = shareResult.rows[0] || null
+      if (
+        !share ||
+        Number(share.worker_id) !== Number(request.worker_id) ||
+        !resolveWorkOrderShareCancellationStatus(workOrder.status, share.status)
+      ) {
+        return {
+          request: null,
+          order: null,
+          releasedDepositAmount: 0,
+          levelChanged: false,
+          accountDisabled: false,
+          failureReason: 'target_state_changed',
+        }
+      }
+      await ensureWorkerWalletWithClient(client, Number(request.worker_id), input.now)
+      const wallet = await getWorkerWalletWithClient(client, Number(request.worker_id))
+      releasedDepositAmount = Math.min(
+        Number(share.share_deposit || 0),
+        Number(wallet?.frozen_deposit_amount || 0),
+      )
+      if (releasedDepositAmount > 0) {
+        const nextAvailable = Number(wallet?.available_amount || 0) + releasedDepositAmount
+        const nextFrozen = Math.max(
+          0,
+          Number(wallet?.frozen_deposit_amount || 0) - releasedDepositAmount,
+        )
+        await client.query(
+          `UPDATE worker_wallets
+           SET available_amount = $1, frozen_deposit_amount = $2, updated_at = $3
+           WHERE worker_id = $4`,
+          [nextAvailable, nextFrozen, input.now, request.worker_id],
+        )
+        await client.query(
+          `INSERT INTO worker_wallet_ledgers (
+             worker_id, ledger_type, amount, balance_after, frozen_after,
+             related_work_order_id, note, payload_json, created_at
+           ) VALUES ($1, 'deposit_release', $2, $3, $4, $5, '撤单申请审核通过退还拼单押金', $6::jsonb, $7)`,
+          [
+            request.worker_id,
+            releasedDepositAmount,
+            nextAvailable,
+            nextFrozen,
+            request.work_order_id,
+            JSON.stringify({ requestId: request.id, shareId: share.id, reason: request.reason }),
+            input.now,
+          ],
+        )
+      }
+      await client.query(
+        `UPDATE work_order_shares SET status = 'cancelled', updated_at = $1 WHERE id = $2`,
+        [input.now, share.id],
+      )
+      await client.query(
+        `UPDATE work_orders
+         SET status = 'open', submitted_at = NULL, published_at = COALESCE(published_at, $1), updated_at = $1
+         WHERE id = $2`,
+        [input.now, workOrder.id],
+      )
+    } else {
+      if (
+        workOrder.status !== 'in_progress' ||
+        Number(workOrder.assigned_worker_id || 0) !== Number(request.worker_id)
+      ) {
+        return {
+          request: null,
+          order: null,
+          releasedDepositAmount: 0,
+          levelChanged: false,
+          accountDisabled: false,
+          failureReason: 'target_state_changed',
+        }
+      }
+      await ensureWorkerWalletWithClient(client, Number(request.worker_id), input.now)
+      const wallet = await getWorkerWalletWithClient(client, Number(request.worker_id))
+      releasedDepositAmount = Math.min(
+        await getOutstandingDepositAmountWithClient(
+          client,
+          Number(request.worker_id),
+          workOrder.id,
+        ),
+        Number(wallet?.frozen_deposit_amount || 0),
+      )
+      await client.query(
+        `UPDATE work_orders
+         SET status = 'open', assigned_worker_id = NULL, assigned_at = NULL, deadline_at = NULL,
+             published_at = $1, updated_at = $1
+         WHERE id = $2`,
+        [input.now, workOrder.id],
+      )
+      if (releasedDepositAmount > 0) {
+        const nextAvailable = Number(wallet?.available_amount || 0) + releasedDepositAmount
+        const nextFrozen = Math.max(
+          0,
+          Number(wallet?.frozen_deposit_amount || 0) - releasedDepositAmount,
+        )
+        await client.query(
+          `UPDATE worker_wallets
+           SET available_amount = $1, frozen_deposit_amount = $2, updated_at = $3
+           WHERE worker_id = $4`,
+          [nextAvailable, nextFrozen, input.now, request.worker_id],
+        )
+        await client.query(
+          `INSERT INTO worker_wallet_ledgers (
+             worker_id, ledger_type, amount, balance_after, frozen_after,
+             related_work_order_id, note, payload_json, created_at
+           ) VALUES ($1, 'deposit_release', $2, $3, $4, $5, '撤单申请审核通过退还押金', $6::jsonb, $7)`,
+          [
+            request.worker_id,
+            releasedDepositAmount,
+            nextAvailable,
+            nextFrozen,
+            request.work_order_id,
+            JSON.stringify({ requestId: request.id, reason: request.reason }),
+            input.now,
+          ],
+        )
+      }
+    }
+
+    const penalty = await applyWorkerCancelRequestPenaltyWithClient(client, {
+      workerId: Number(request.worker_id),
+      requestId: Number(request.id),
+      now: input.now,
+    })
+    await client.query(
+      `UPDATE worker_order_cancel_requests
+       SET status = 'approved', review_note = $1, reviewed_by = $2, reviewed_at = $3,
+           level_before_id = $4, updated_at = $3
+       WHERE id = $5`,
+      [input.reviewNote, input.actorName, input.now, penalty.levelBeforeId, request.id],
+    )
+    const updatedOrder = await getWorkOrderByIdWithClient(client, workOrder.id)
+    await createWorkOrderEventWithClient(client, {
+      workOrderId: Number(workOrder.id),
+      actorType: 'admin',
+      actorId: input.actorName,
+      eventType: 'cancel_request_approved',
+      fromStatus: workOrder.status,
+      toStatus: updatedOrder?.status || workOrder.status,
+      payloadJson: JSON.stringify({
+        requestId: request.id,
+        shareId: request.work_order_share_id,
+        releasedDepositAmount,
+        levelChanged: penalty.levelChanged,
+        accountDisabled: penalty.accountDisabled,
+        note: input.reviewNote,
+      }),
+      now: input.now,
+    })
+    return {
+      request: await getWorkerCancelRequestByIdWithClient(client, request.id),
+      order: updatedOrder,
+      releasedDepositAmount,
+      levelChanged: penalty.levelChanged,
+      accountDisabled: penalty.accountDisabled,
+      failureReason: null,
+    }
+  })
+}
+
 export async function unassignWorkOrder(input: {
   workOrderId: number
   now: string
@@ -3349,6 +3771,171 @@ async function createWorkOrderEventWithClient(
   )
 }
 
+async function getWorkerCancelRequestByIdWithClient(
+  client: PoolClient,
+  requestId: number | string,
+): Promise<WorkerCancelRequestRow | null> {
+  const result = await client.query<WorkerCancelRequestRow>(
+    `${WORKER_CANCEL_REQUEST_SELECT} WHERE cr.id = $1 LIMIT 1`,
+    [Number(requestId)],
+  )
+  return result.rows[0] || null
+}
+
+async function countWorkerAcceptedOrdersWithClient(
+  client: PoolClient,
+  workerId: number,
+): Promise<number> {
+  const result = await client.query<{ total: number }>(
+    `SELECT COUNT(DISTINCT order_key)::int AS total
+     FROM (
+       SELECT COALESCE(
+         'order:' || NULLIF(wo.order_id::text, ''),
+         'platform_order:' || NULLIF(BTRIM(wo.platform_order_id), ''),
+         'work_order:' || wo.id::text
+       ) AS order_key
+       FROM work_orders wo
+       WHERE wo.assigned_worker_id = $1 AND wo.status = 'accepted'
+
+       UNION
+
+       SELECT COALESCE(
+         'order:' || NULLIF(wo.order_id::text, ''),
+         'platform_order:' || NULLIF(BTRIM(wo.platform_order_id), ''),
+         'work_order:' || wo.id::text
+       ) AS order_key
+       FROM work_order_shares wos
+       INNER JOIN work_orders wo ON wo.id = wos.work_order_id
+       WHERE wos.worker_id = $1 AND wos.status = 'accepted'
+     ) AS completed_orders`,
+    [workerId],
+  )
+  return Number(result.rows[0]?.total || 0)
+}
+
+/** 将有效验收次数压到低一级门槛，保留真实订单与资金流水。 */
+async function applyWorkerCancelRequestPenaltyWithClient(
+  client: PoolClient,
+  input: { workerId: number; requestId: number; now: string },
+): Promise<{ levelBeforeId: number | null; levelChanged: boolean; accountDisabled: boolean }> {
+  const workerResult = await client.query<{
+    level_id: number | null
+    level_key: string
+    level_name: string
+    sort_order: number
+    level_penalty_accepted_count: number
+  }>(
+    `SELECT wu.level_id, wl.level_key, wl.name AS level_name, wl.sort_order,
+            wu.level_penalty_accepted_count
+     FROM worker_users wu
+     LEFT JOIN worker_levels wl ON wl.id = wu.level_id
+     WHERE wu.id = $1
+     FOR UPDATE OF wu`,
+    [input.workerId],
+  )
+  const worker = workerResult.rows[0]
+  const levelBeforeId = worker?.level_id ? Number(worker.level_id) : null
+  if (!worker || !levelBeforeId) {
+    return { levelBeforeId, levelChanged: false, accountDisabled: false }
+  }
+
+  const approvedResult = await client.query<{ total: number }>(
+    `SELECT COUNT(*)::int AS total
+     FROM worker_order_cancel_requests
+     WHERE worker_id = $1 AND status = 'approved'`,
+    [input.workerId],
+  )
+  const approvedTotal = Number(approvedResult.rows[0]?.total || 0) + 1
+  const isVip1 = String(worker.level_key || '').toLowerCase() === 'vip1'
+
+  if (isVip1) {
+    const vip1ApprovedResult = await client.query<{ total: number }>(
+      `SELECT COUNT(*)::int AS total
+       FROM worker_order_cancel_requests
+       WHERE worker_id = $1 AND status = 'approved' AND level_before_id = $2`,
+      [input.workerId, levelBeforeId],
+    )
+    const vip1ApprovedTotal = Number(vip1ApprovedResult.rows[0]?.total || 0) + 1
+    if (vip1ApprovedTotal >= 5) {
+      await client.query(
+        `UPDATE worker_users
+         SET status = 'disabled', session_version = session_version + 1, updated_at = $1
+         WHERE id = $2`,
+        [input.now, input.workerId],
+      )
+      await client.query(
+        `UPDATE worker_sessions
+         SET status = 'revoked', revoked_at = $1, updated_at = $1
+         WHERE worker_id = $2 AND status = 'active'`,
+        [input.now, input.workerId],
+      )
+      await client.query(
+        `INSERT INTO worker_level_logs (
+           worker_id, from_level_id, to_level_id, reason, payload_json, created_at
+         ) VALUES ($1, $2, $2, 'cancel_request_ban', $3::jsonb, $4)`,
+        [
+          input.workerId,
+          levelBeforeId,
+          JSON.stringify({ requestId: input.requestId, vip1ApprovedTotal, approvedTotal }),
+          input.now,
+        ],
+      )
+      return { levelBeforeId, levelChanged: false, accountDisabled: true }
+    }
+    return { levelBeforeId, levelChanged: false, accountDisabled: false }
+  }
+
+  if (approvedTotal % 10 !== 0) {
+    return { levelBeforeId, levelChanged: false, accountDisabled: false }
+  }
+
+  const lowerLevelResult = await client.query<{
+    id: number
+    level_key: string
+    threshold: number
+  }>(
+    `SELECT id, level_key, COALESCE((permission_json->>'upgradeThreshold')::int, 0) AS threshold
+     FROM worker_levels
+     WHERE status = 'active' AND sort_order < $1
+     ORDER BY sort_order DESC, id DESC
+     LIMIT 1`,
+    [Number(worker.sort_order || 0)],
+  )
+  const lowerLevel = lowerLevelResult.rows[0]
+  if (!lowerLevel) {
+    return { levelBeforeId, levelChanged: false, accountDisabled: false }
+  }
+  const actualAcceptedCount = await countWorkerAcceptedOrdersWithClient(client, input.workerId)
+  const nextPenaltyAcceptedCount = Math.max(
+    Number(worker.level_penalty_accepted_count || 0),
+    actualAcceptedCount - Math.max(0, Number(lowerLevel.threshold || 0)),
+  )
+  await client.query(
+    `UPDATE worker_users
+     SET level_id = $1, level_penalty_accepted_count = $2, updated_at = $3
+     WHERE id = $4`,
+    [lowerLevel.id, nextPenaltyAcceptedCount, input.now, input.workerId],
+  )
+  await client.query(
+    `INSERT INTO worker_level_logs (
+       worker_id, from_level_id, to_level_id, reason, payload_json, created_at
+     ) VALUES ($1, $2, $3, 'cancel_request_penalty', $4::jsonb, $5)`,
+    [
+      input.workerId,
+      levelBeforeId,
+      lowerLevel.id,
+      JSON.stringify({
+        requestId: input.requestId,
+        approvedTotal,
+        actualAcceptedCount,
+        penaltyAcceptedCount: nextPenaltyAcceptedCount,
+      }),
+      input.now,
+    ],
+  )
+  return { levelBeforeId, levelChanged: true, accountDisabled: false }
+}
+
 async function getOutstandingDepositAmountWithClient(
   client: PoolClient,
   workerId: number,

apps/backend/src/repositories/worker-platform/worker-repo.ts

@@ -1087,12 +1087,14 @@ export async function maybeUpgradeWorkerLevelWithClient(
   const current = await client.query<{
     id: number
     level_id: number | null
+    level_penalty_accepted_count: number
     upgrade_threshold: number | null
   }>(
     `
       SELECT
         wu.id,
         wu.level_id,
+        wu.level_penalty_accepted_count,
         COALESCE((wl.permission_json->>'upgradeThreshold')::int, 0) AS upgrade_threshold
       FROM worker_users wu
       LEFT JOIN worker_levels wl ON wl.id = wu.level_id
@@ -1134,6 +1136,10 @@ export async function maybeUpgradeWorkerLevelWithClient(
     [workerId],
   )
   const acceptedCount = Number(acceptedResult.rows[0]?.total || 0)
+  const effectiveAcceptedCount = Math.max(
+    0,
+    acceptedCount - Number(currentRow.level_penalty_accepted_count || 0),
+  )
 
   const nextLevelResult = await client.query<{
     id: number
@@ -1149,7 +1155,7 @@ export async function maybeUpgradeWorkerLevelWithClient(
       ORDER BY COALESCE((permission_json->>'upgradeThreshold')::int, 0) DESC, sort_order ASC
       LIMIT 1
     `,
-    [acceptedCount],
+    [effectiveAcceptedCount],
   )
   const nextLevel = nextLevelResult.rows[0]
   const nextLevelId = Number(nextLevel?.id || 0)
@@ -1176,7 +1182,13 @@ export async function maybeUpgradeWorkerLevelWithClient(
         worker_id, from_level_id, to_level_id, reason, payload_json, created_at
       ) VALUES ($1, $2, $3, 'auto', $4::jsonb, $5)
     `,
-    [workerId, currentRow.level_id || null, nextLevelId, JSON.stringify({ acceptedCount }), now],
+    [
+      workerId,
+      currentRow.level_id || null,
+      nextLevelId,
+      JSON.stringify({ acceptedCount, effectiveAcceptedCount }),
+      now,
+    ],
   )
   return getWorkerUserByIdWithClient(client, workerId)
 }

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

@@ -31,12 +31,14 @@ import {
   listAdminWorkerLevels,
   listAdminWorkerUsers,
   listAdminWorkOrders,
+  listAdminWorkerCancelRequests,
   markAdminWorkOrderProblem,
   pinAdminWorkOrder,
   publishAdminWorkOrder,
   reopenAdminCancelledWorkOrder,
   reprocessAdminKuaishouSendCodeWorkOrders,
   reviewAdminWorkerFinanceRequest,
+  reviewAdminWorkerCancelRequest,
   resolveAdminProblemWorkOrder,
   reviewAdminWorkerUser,
   resetAdminWorkerPassword,
@@ -483,6 +485,40 @@ router.get(
   }),
 )
 
+router.get(
+  '/worker-platform/cancel-requests',
+  requireAdminRoles(['admin', 'operator', 'support']),
+  createJsonHandler((req) => listAdminWorkerCancelRequests(req.query), {
+    successMessage: 'ok',
+    errorMessage: '读取撤单申请失败',
+    scope: '[admin/worker-platform/cancel-requests]',
+  }),
+)
+
+router.post(
+  '/worker-platform/cancel-requests/:requestId/review',
+  requireAdminRoles(['admin', 'operator', 'support']),
+  createJsonHandler(
+    (req) =>
+      reviewAdminWorkerCancelRequest(
+        String(req.params.requestId || ''),
+        req.body || {},
+        req.adminSession?.username || '',
+      ),
+    {
+      successMessage: '撤单申请已审核',
+      errorMessage: '审核撤单申请失败',
+      scope: '[admin/worker-platform/cancel-requests/:requestId/review]',
+      audit: (req, data) => ({
+        action: 'worker_cancel_request_reviewed',
+        targetType: 'worker_cancel_request',
+        targetId: String(req.params.requestId || ''),
+        data: data && typeof data === 'object' ? (data as Record<string, unknown>) : {},
+      }),
+    },
+  ),
+)
+
 router.post(
   '/worker-platform/orders/mock',
   requireAdminRoles(['admin', 'operator', 'support']),

apps/backend/src/routes/worker.ts

@@ -37,6 +37,8 @@ import {
   remindWorkerOrderAcceptance,
   supplementWorkerAcceptedOrderEvidence,
   submitWorkerOrderAcceptance,
+  getWorkerCancelRequestSummary,
+  submitWorkerCancelRequest,
 } from '../services/worker-platform/index.js'
 import { buildNotFoundPayload, createRouteHandler } from '../utils/http.js'
 import {
@@ -440,6 +442,34 @@ router.get(
   }),
 )
 
+router.get(
+  '/orders/cancel-requests',
+  requireActiveWorker,
+  createRouteHandler((req) => getWorkerCancelRequestSummary(getRequiredWorkerSession(req)), {
+    successMessage: 'ok',
+    errorMessage: '读取取消申请失败',
+    scope: '[worker/orders/cancel-requests]',
+  }),
+)
+
+router.post(
+  '/orders/:workOrderId/cancel-requests',
+  requireActiveWorker,
+  createRouteHandler(
+    (req) =>
+      submitWorkerCancelRequest(
+        String(req.params.workOrderId || ''),
+        req.body || {},
+        getRequiredWorkerSession(req),
+      ),
+    {
+      successMessage: '取消申请已提交，等待客服审核',
+      errorMessage: '提交取消申请失败',
+      scope: '[worker/orders/:workOrderId/cancel-requests]',
+    },
+  ),
+)
+
 router.get(
   '/orders/:workOrderId/events',
   requireActiveWorker,

apps/backend/src/services/admin/admin-notification-service.ts

@@ -96,6 +96,32 @@ export async function createWorkerAcceptanceAdminNotification(input: {
   })
 }
 
+export async function createWorkerCancelRequestAdminNotification(input: {
+  requestId: number
+  workOrderId: number
+  workOrderNo: string
+  productName: string
+  workerName: string
+  reason: string
+}) {
+  return createConfiguredWorkerPlatformNotification('cancel_requested', {
+    notificationType: 'worker_cancel_requested',
+    priority: 'high',
+    entityType: 'worker_cancel_request',
+    entityId: input.requestId,
+    dedupeKey: `worker_cancel_request:${input.requestId}`,
+    title: '有打手撤单申请待审核',
+    body: [
+      `订单：${input.workOrderNo || input.workOrderId}`,
+      `商品：${input.productName || '-'}`,
+      `打手：${input.workerName || '-'}`,
+      `原因：${input.reason || '-'}`,
+    ].join('；'),
+    actionPath: `${ADMIN_WORKER_PLATFORM_PATH}?tab=cancel-requests&cancelRequestId=${input.requestId}`,
+    now: new Date().toISOString(),
+  })
+}
+
 export async function remindWorkerAcceptanceAdminNotification(workOrderId: number) {
   const now = new Date().toISOString()
   const eventConfig = getWorkerPlatformNotificationConfig().events.acceptance_reminded

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

@@ -50,6 +50,8 @@ import {
   resolveProblemWorkOrder,
   reviewWorkerFinanceRequest,
   reopenCancelledWorkOrder,
+  listAdminWorkerCancelRequests as listWorkerCancelRequestsForAdmin,
+  reviewWorkerCancelRequest,
   updateWorkOrder,
   updateWorkOrderBasic,
   updateWorkerUser,
@@ -108,6 +110,7 @@ import {
   mapWorkProductRule,
   mapWorkerLevel,
   mapWorkerUser,
+  mapWorkerCancelRequest,
   normalizeAdminFinanceReviewStatus,
   normalizeAmountFen,
   normalizeBoolean,
@@ -1355,6 +1358,74 @@ export async function listAdminWorkOrders(query: JsonObject = {}) {
   }
 }
 
+export async function listAdminWorkerCancelRequests(query: JsonObject = {}) {
+  const status = String(query.status || 'pending').trim()
+  const normalizedStatus = ['pending', 'approved', 'rejected'].includes(status) ? status : 'pending'
+  return {
+    items: (await listWorkerCancelRequestsForAdmin(normalizedStatus)).map(mapWorkerCancelRequest),
+  }
+}
+
+export async function reviewAdminWorkerCancelRequest(
+  requestId: number | string,
+  payload: JsonObject = {},
+  actorName = '',
+) {
+  const approved = payload.approved === true || String(payload.action || '').trim() === 'approve'
+  const reviewNote = String(payload.reviewNote || payload.note || '').trim()
+  if (!reviewNote) {
+    throw createHttpError('请填写审核备注', {
+      statusCode: 400,
+      errorCode: 'worker_cancel_request_review_note_required',
+    })
+  }
+  const result = await reviewWorkerCancelRequest({
+    requestId: Number(requestId),
+    approved,
+    reviewNote,
+    actorName,
+    now: nowIso(),
+  })
+  if (result.failureReason === 'request_not_found') {
+    throw createHttpError('撤单申请不存在', {
+      statusCode: 404,
+      errorCode: 'worker_cancel_request_not_found',
+    })
+  }
+  if (result.failureReason === 'request_not_pending') {
+    throw createHttpError('该撤单申请已审核，请刷新后重试', {
+      statusCode: 409,
+      errorCode: 'worker_cancel_request_not_pending',
+    })
+  }
+  if (!result.request || !result.order) {
+    throw createHttpError('订单状态已变化，无法审核该撤单申请', {
+      statusCode: 409,
+      errorCode: 'worker_cancel_request_target_changed',
+    })
+  }
+  await resolveAdminNotificationEntity(
+    'worker_cancel_request',
+    Number(result.request.id),
+    approved ? 'approved' : 'rejected',
+  )
+  const workerId = Number(result.request.worker_id)
+  publishWorkOrderRealtimeChange({
+    workOrderId: Number(result.order.id),
+    workerIds: workerId > 0 ? [workerId] : [],
+    hallChanged: approved,
+  })
+  if (approved && workerId > 0) publishWorkerWalletRealtimeChange(workerId)
+  return {
+    request: mapWorkerCancelRequest(result.request),
+    order: mapWorkOrderAdmin(result.order),
+    approved,
+    releasedDepositAmount: result.releasedDepositAmount,
+    levelChanged: result.levelChanged,
+    accountDisabled: result.accountDisabled,
+  }
+}
+
 export async function deductAdminWorkOrderPendingDeposit(
   workOrderId: number | string,
   payload: JsonObject = {},

apps/backend/src/services/worker-platform/mappers.ts

@@ -257,6 +257,41 @@ export function mapWorkerUser(worker: WorkerUserRow) {
   }
 }
 
+export function mapWorkerCancelRequest(request: {
+  id: number
+  work_order_id: number
+  work_order_share_id: number | null
+  worker_id: number
+  reason: string
+  status: string
+  review_note: string
+  reviewed_by: string
+  created_at: string
+  reviewed_at: string | null
+  work_order_no?: string
+  product_name?: string
+  worker_username?: string
+  worker_display_name?: string
+  share_quantity?: number | null
+}) {
+  return {
+    requestId: Number(request.id),
+    workOrderId: Number(request.work_order_id),
+    shareId: request.work_order_share_id ? Number(request.work_order_share_id) : null,
+    workerId: Number(request.worker_id),
+    workOrderNo: String(request.work_order_no || ''),
+    productName: String(request.product_name || ''),
+    workerName: String(request.worker_display_name || request.worker_username || ''),
+    shareQuantity: request.share_quantity ? Number(request.share_quantity) : null,
+    reason: String(request.reason || ''),
+    status: String(request.status || ''),
+    reviewNote: String(request.review_note || ''),
+    reviewedBy: String(request.reviewed_by || ''),
+    createdAt: request.created_at,
+    reviewedAt: request.reviewed_at,
+  }
+}
+
 export function mapWalletLedger(ledger: WorkerWalletLedgerRow | null | undefined) {
   if (!ledger) return null
   return {

apps/backend/src/services/worker-platform/worker-platform-notification-config-service.ts

@@ -8,6 +8,7 @@ export const WORKER_PLATFORM_NOTIFICATION_EVENT_KEYS = [
   'acceptance_submitted',
   'acceptance_reminded',
   'material_required',
+  'cancel_requested',
 ] as const
 
 export type WorkerPlatformNotificationEventKey =
@@ -51,6 +52,7 @@ export function createDefaultWorkerPlatformNotificationConfig(): WorkerPlatformN
         soundEnabled: false,
         externalPushEnabled: false,
       },
+      cancel_requested: createEnabledEventConfig(),
     },
   }
 }

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

@@ -6,6 +6,7 @@ import {
   acceptWorkOrderAndSettle,
   acceptWorkOrderShareAndSettle,
   countWorkerAcceptedOrders,
+  createWorkerCancelRequest,
   countWorkerActiveOrders,
   countWorkerTimeoutEvents,
   countWorkerWithdrawRequestsOnDay,
@@ -42,6 +43,7 @@ import {
   listPendingMaterialWorkOrdersByPlatformOrderId,
   listWorkerFinanceRequests,
   listWorkerCompletionLeaderboard,
+  listWorkerCancelRequests,
   listWorkerSharesByWorker,
   listWorkerWalletLedgers,
   listWorkerWorkOrderNotes,
@@ -53,6 +55,7 @@ import {
   listWorkOrderShares,
   listWorkOrderSharesByOrderIds,
   listWorkerLevels,
+  getWorkerCancelRequestRisk,
   listDueDepositUnfreezes,
   listOverdueWorkOrders,
   releaseDepositUnfreeze,
@@ -82,6 +85,7 @@ import { getWorkerFinanceConfig } from './worker-finance-config-service.js'
 import { refreshUploadedFileUrls } from '../file-storage/file-storage-service.js'
 import {
   createWorkerAcceptanceAdminNotification,
+  createWorkerCancelRequestAdminNotification,
   createWorkerRechargeAdminNotification,
   createWorkerWithdrawAdminNotification,
   getWorkerAcceptanceReminder,
@@ -111,6 +115,7 @@ import {
   mapWorkOrderPublic,
   mapWorkOrderEvents,
   mapWorkOrderShare,
+  mapWorkerCancelRequest,
   mapWorkerUser,
   normalizeAmountFen,
   assertWithdrawChannelAllowedForAmount,
@@ -1738,6 +1743,82 @@ export async function getWorkerMyOrderEvents(workOrderId: number | string, sessi
   return { items: await mapWorkOrderEvents(events) }
 }
 
+export async function getWorkerCancelRequestSummary(session: WorkerSession) {
+  requireActiveWorkerSession(session)
+  const [risk, requests] = await Promise.all([
+    getWorkerCancelRequestRisk(session.workerId, nowIso()),
+    listWorkerCancelRequests(session.workerId),
+  ])
+  return { risk, items: requests.map(mapWorkerCancelRequest) }
+}
+
+export async function submitWorkerCancelRequest(
+  workOrderId: number | string,
+  payload: JsonObject = {},
+  session: WorkerSession,
+) {
+  requireActiveWorkerSession(session)
+  const reason = String(payload.reason || '').trim()
+  if (!reason) {
+    throw createHttpError('请填写申请取消原因', {
+      statusCode: 400,
+      errorCode: 'worker_cancel_request_reason_required',
+    })
+  }
+  if (reason.length > 300) {
+    throw createHttpError('申请取消原因不能超过 300 个字符', {
+      statusCode: 400,
+      errorCode: 'worker_cancel_request_reason_too_long',
+    })
+  }
+  const now = nowIso()
+  const result = await createWorkerCancelRequest({
+    workOrderId: Number(workOrderId),
+    workerId: Number(session.workerId),
+    reason,
+    now,
+  })
+  if (result.failureReason === 'daily_limit_reached') {
+    throw createHttpError('今日最多申请取消 5 次，请明日再试', {
+      statusCode: 429,
+      errorCode: 'worker_cancel_request_daily_limit',
+    })
+  }
+  if (result.failureReason === 'request_pending') {
+    throw createHttpError('该订单已有待审核的取消申请', {
+      statusCode: 409,
+      errorCode: 'worker_cancel_request_pending',
+    })
+  }
+  if (result.failureReason === 'share_not_cancellable') {
+    throw createHttpError('当前拼单份额不能申请取消', {
+      statusCode: 409,
+      errorCode: 'worker_cancel_request_share_status_invalid',
+    })
+  }
+  if (!result.request) {
+    throw createHttpError('当前订单不能申请取消', {
+      statusCode: 409,
+      errorCode: 'worker_cancel_request_status_invalid',
+    })
+  }
+  const worker = await getRequiredWorker(session.workerId)
+  await createWorkerCancelRequestAdminNotification({
+    requestId: Number(result.request.id),
+    workOrderId: Number(result.request.work_order_id),
+    workOrderNo: result.request.work_order_no || '',
+    productName: result.request.product_name || '',
+    workerName: worker.display_name || worker.username,
+    reason,
+  })
+  const risk = await getWorkerCancelRequestRisk(session.workerId, now)
+  publishWorkOrderRealtimeChange({
+    workOrderId: Number(result.request.work_order_id),
+    workerIds: [Number(session.workerId)],
+  })
+  return { request: mapWorkerCancelRequest(result.request), risk }
+}
+
 export async function saveWorkerOrderNote(
   workOrderId: number | string,
   payload: JsonObject = {},

apps/frontend/src/components/WorkOrderEventTimeline.tsx

@@ -95,6 +95,21 @@ export function formatWorkOrderEvent(event: WorkOrderEvent): EventNodeStyle {
       }
     case 'cancelled_by_worker':
       return { title: '打手取消接单', color: 'red' }
+    case 'cancel_request_submitted':
+      return {
+        title: note ? `打手提交撤单申请：${note}` : '打手提交撤单申请，等待客服审核',
+        color: 'orange',
+      }
+    case 'cancel_request_rejected':
+      return {
+        title: note ? `客服驳回撤单申请：${note}` : '客服驳回撤单申请',
+        color: 'green',
+      }
+    case 'cancel_request_approved':
+      return {
+        title: note ? `客服同意撤单申请：${note}` : '客服同意撤单申请，订单已回到大厅',
+        color: 'red',
+      }
     case 'timeout_reopen':
       return { title: '订单超时未完成，已退回抢单大厅', color: 'orange' }
 

apps/frontend/src/pages/admin/AdminWorkerPlatformPage.tsx

@@ -7,6 +7,7 @@ import PageHeader from '@/components/admin/PageHeader'
 import { fetchAdminWorkerPlatformSummary } from '@/services/admin'
 import { getAdminRole } from '@/utils/admin-auth'
 import CategoriesPanel from './panels/CategoriesPanel'
+import CancelRequestsPanel from './panels/CancelRequestsPanel'
 import FinancePanel from './panels/FinancePanel'
 import LevelsPanel from './panels/LevelsPanel'
 import NotificationsPanel from './panels/NotificationsPanel'
@@ -21,8 +22,7 @@ export default function AdminWorkerPlatformPage() {
   const role = getAdminRole()
   const isAdmin = role === 'admin'
   const isSupport = role === 'support'
-  const visibleActiveTab =
+  const visibleActiveTab = !isAdmin && activeTab === 'notifications' ? 'orders' : activeTab
-    isSupport || (!isAdmin && activeTab === 'notifications') ? 'orders' : activeTab
 
   useEffect(() => {
     const tab = searchParams.get('tab')
@@ -46,9 +46,13 @@ export default function AdminWorkerPlatformPage() {
         onChange={changeTab}
         items={
           isSupport
-            ? [{ key: 'orders', label: '接单工单', children: <WorkOrdersPanel /> }]
+            ? [
+                { key: 'orders', label: '接单工单', children: <WorkOrdersPanel /> },
+                { key: 'cancel-requests', label: '撤单审核', children: <CancelRequestsPanel /> },
+              ]
             : [
                 { key: 'orders', label: '接单工单', children: <WorkOrdersPanel /> },
+                { key: 'cancel-requests', label: '撤单审核', children: <CancelRequestsPanel /> },
                 { key: 'rules', label: '接单模板', children: <ProductRulesPanel /> },
                 { key: 'product-match', label: '匹配诊断', children: <ProductMatchPanel /> },
                 { key: 'categories', label: '分类', children: <CategoriesPanel /> },
@@ -70,6 +74,7 @@ const ACTIVE_TAB_STORAGE_KEY = 'admin-worker-platform-tab'
 function loadActiveTabPreference(): string {
   const saved = localStorage.getItem(ACTIVE_TAB_STORAGE_KEY)
   return saved === 'orders' ||
+    saved === 'cancel-requests' ||
     saved === 'rules' ||
     saved === 'product-match' ||
     saved === 'categories' ||
@@ -88,6 +93,7 @@ function loadActiveTab(tab: string | null): string {
 function isWorkerPlatformTab(tab: string | null): tab is string {
   return [
     'orders',
+    'cancel-requests',
     'rules',
     'product-match',
     'categories',

apps/frontend/src/pages/admin/panels/CancelRequestsPanel.tsx

@@ -0,0 +1,203 @@
+import { ReloadOutlined } from '@ant-design/icons'
+import { useQuery, useQueryClient } from '@tanstack/react-query'
+import { App, Button, Card, Form, Input, Modal, Space, Table, Tag, Typography } from 'antd'
+import type { TableColumnsType } from 'antd'
+import { useEffect, useState } from 'react'
+import { useSearchParams } from 'react-router'
+
+import { fetchAdminWorkerCancelRequests, reviewAdminWorkerCancelRequest } from '@/services/admin'
+import type { WorkerCancelRequest } from '@/types/worker-platform'
+import { formatAdminDateTime } from '@/utils/admin-time'
+
+type ReviewFormValues = {
+  reviewNote?: string
+}
+
+export default function CancelRequestsPanel() {
+  const { message } = App.useApp()
+  const queryClient = useQueryClient()
+  const [searchParams, setSearchParams] = useSearchParams()
+  const [reviewTarget, setReviewTarget] = useState<{
+    request: WorkerCancelRequest
+    approved: boolean
+  } | null>(null)
+  const [form] = Form.useForm<ReviewFormValues>()
+  const requestsQuery = useQuery({
+    queryKey: ['admin-worker-cancel-requests', 'pending'],
+    queryFn: () => fetchAdminWorkerCancelRequests('pending'),
+  })
+
+  useEffect(() => {
+    const requestId = Number(searchParams.get('cancelRequestId') || 0)
+    if (!Number.isInteger(requestId) || requestId <= 0) return
+    const request = (requestsQuery.data?.data.items || []).find(
+      (item) => item.requestId === requestId,
+    )
+    if (!request) return
+    setReviewTarget({ request, approved: true })
+    form.resetFields()
+    setSearchParams(
+      (current) => {
+        current.delete('cancelRequestId')
+        return current
+      },
+      { replace: true },
+    )
+  }, [form, requestsQuery.data, searchParams, setSearchParams])
+
+  async function refreshAll() {
+    await Promise.all([
+      queryClient.invalidateQueries({ queryKey: ['admin-worker-cancel-requests'] }),
+      queryClient.invalidateQueries({ queryKey: ['admin-worker-platform-orders'] }),
+      queryClient.invalidateQueries({ queryKey: ['admin-worker-platform-summary'] }),
+    ])
+  }
+
+  function openReview(request: WorkerCancelRequest, approved: boolean) {
+    setReviewTarget({ request, approved })
+    form.resetFields()
+  }
+
+  async function submitReview(values: ReviewFormValues) {
+    if (!reviewTarget) return
+    try {
+      const response = await reviewAdminWorkerCancelRequest(reviewTarget.request.requestId, {
+        approved: reviewTarget.approved,
+        reviewNote: String(values.reviewNote || '').trim(),
+      })
+      const result = response.data
+      const resultText = result.accountDisabled
+        ? '，该打手已封禁'
+        : result.levelChanged
+          ? '，该打手已降一级 VIP'
+          : ''
+      message.success(`${result.approved ? '已同意' : '已驳回'}撤单申请${resultText}`)
+      setReviewTarget(null)
+      form.resetFields()
+      await refreshAll()
+    } catch (error) {
+      message.error(error instanceof Error ? error.message : '审核撤单申请失败')
+    }
+  }
+
+  const columns: TableColumnsType<WorkerCancelRequest> = [
+    {
+      title: '订单',
+      width: 260,
+      render: (_, request) => (
+        <div className="cell-stack">
+          <Typography.Text strong>{request.productName || '-'}</Typography.Text>
+          <Typography.Text type="secondary">{request.workOrderNo || '-'}</Typography.Text>
+        </div>
+      ),
+    },
+    {
+      title: '打手 / 份数',
+      width: 180,
+      render: (_, request) => (
+        <div className="cell-stack">
+          <Typography.Text>{request.workerName || `打手 #${request.workerId}`}</Typography.Text>
+          {request.shareQuantity ? (
+            <Tag color="purple">拼单 {request.shareQuantity} 份</Tag>
+          ) : (
+            <Tag>整单</Tag>
+          )}
+        </div>
+      ),
+    },
+    {
+      title: '申请原因',
+      render: (_, request) => (
+        <Typography.Text ellipsis={{ tooltip: request.reason }}>{request.reason}</Typography.Text>
+      ),
+    },
+    {
+      title: '申请时间',
+      width: 180,
+      render: (_, request) => formatAdminDateTime(request.createdAt),
+    },
+    {
+      title: '操作',
+      width: 180,
+      render: (_, request) => (
+        <Space>
+          <Button type="primary" size="small" onClick={() => openReview(request, true)}>
+            同意
+          </Button>
+          <Button danger size="small" onClick={() => openReview(request, false)}>
+            驳回
+          </Button>
+        </Space>
+      ),
+    },
+  ]
+
+  return (
+    <>
+      <Card
+        title={`待审核撤单申请（${requestsQuery.data?.data.items.length || 0}）`}
+        extra={
+          <Button
+            icon={<ReloadOutlined />}
+            loading={requestsQuery.isFetching}
+            onClick={() => requestsQuery.refetch()}
+          >
+            刷新
+          </Button>
+        }
+        bordered={false}
+      >
+        <Table<WorkerCancelRequest>
+          rowKey="requestId"
+          size="small"
+          loading={requestsQuery.isLoading}
+          dataSource={requestsQuery.data?.data.items || []}
+          columns={columns}
+          pagination={false}
+          locale={{ emptyText: '暂无待审核撤单申请' }}
+          scroll={{ x: 900 }}
+        />
+      </Card>
+      <Modal
+        title={reviewTarget?.approved ? '同意撤单申请' : '驳回撤单申请'}
+        open={Boolean(reviewTarget)}
+        onCancel={() => {
+          setReviewTarget(null)
+          form.resetFields()
+        }}
+        onOk={() => form.submit()}
+        okText={reviewTarget?.approved ? '确认同意' : '确认驳回'}
+        okButtonProps={reviewTarget?.approved ? undefined : { danger: true }}
+        destroyOnHidden
+      >
+        {reviewTarget ? (
+          <Space direction="vertical" size={12} style={{ width: '100%' }}>
+            <Typography.Text>
+              {reviewTarget.request.workerName || `打手 #${reviewTarget.request.workerId}`}：
+              {reviewTarget.request.reason}
+            </Typography.Text>
+            <Typography.Text type={reviewTarget.approved ? 'warning' : 'secondary'}>
+              {reviewTarget.approved
+                ? '同意后将退还冻结押金，并将整单或对应拼单份额回到大厅；该申请会计入撤单处罚次数。'
+                : '驳回后不会计入累计次数，且会释放本次申请的当天额度。'}
+            </Typography.Text>
+            <Form form={form} layout="vertical" onFinish={submitReview}>
+              <Form.Item
+                label="审核备注"
+                name="reviewNote"
+                rules={[{ required: true, whitespace: true, message: '请填写审核备注' }]}
+              >
+                <Input.TextArea
+                  rows={3}
+                  maxLength={300}
+                  showCount
+                  placeholder="请填写审核结论或说明"
+                />
+              </Form.Item>
+            </Form>
+          </Space>
+        ) : null}
+      </Modal>
+    </>
+  )
+}

apps/frontend/src/pages/admin/panels/NotificationsPanel.tsx

@@ -24,6 +24,7 @@ const notificationEventRows: NotificationEventRow[] = [
   { key: 'acceptance_submitted', name: '提交验收', description: '打手提交订单验收资料' },
   { key: 'acceptance_reminded', name: '催验收', description: '打手在验收后催促处理' },
   { key: 'material_required', name: '待补资料工单', description: '新工单等待后台补充资料' },
+  { key: 'cancel_requested', name: '撤单申请', description: '打手提交新的撤单申请，等待客服审核' },
 ]
 
 export default function NotificationsPanel() {

apps/frontend/src/pages/admin/panels/WorkOrdersPanel.tsx

@@ -267,7 +267,6 @@ export default function WorkOrdersPanel() {
       }),
     enabled: Boolean(assignOrder),
   })
-
   useEffect(() => {
     setSelectedAcceptanceOrderIds([])
   }, [statuses, keyword, workerId, workerLevelIds, targetWorkOrderId, page, pageSize])
@@ -1327,7 +1326,6 @@ export default function WorkOrdersPanel() {
           </div>
         ) : null}
       </Drawer>
-
       <Modal
         title={`编辑工单 · ${getDisplayOrderNo(editOrder)}`}
         open={Boolean(editOrder)}
@@ -2012,7 +2010,10 @@ function renderWorkOrderWorkers(order: WorkOrder) {
   const names = order.sharingWorkers
     .map((worker) => worker.displayName || worker.username || `打手#${worker.workerId}`)
     .join('、')
-  const quantity = order.sharingWorkers.reduce((sum, worker) => sum + Number(worker.quantity || 0), 0)
+  const quantity = order.sharingWorkers.reduce(
+    (sum, worker) => sum + Number(worker.quantity || 0),
+    0,
+  )
   return (
     <div className="cell-stack">
       <Typography.Text ellipsis={{ tooltip: names }}>{names}</Typography.Text>

apps/frontend/src/pages/worker/WorkerOrdersPage.tsx

@@ -34,6 +34,7 @@ import WorkOrderEventTimeline from '@/components/WorkOrderEventTimeline'
 import ImagePreviewList from '@/components/files/ImagePreviewList'
 import ImageUpload from '@/components/files/ImageUpload'
 import {
+  fetchWorkerCancelRequests,
   fetchWorkerMyOrderOverview,
   fetchWorkerMyOrders,
   fetchWorkerProfile,
@@ -43,6 +44,7 @@ import {
   saveWorkerOrderNote,
   supplementWorkerAcceptedOrderEvidence,
   submitWorkerAcceptance,
+  submitWorkerCancelRequest,
 } from '@/services/worker'
 import type {
   CollectField,
@@ -73,6 +75,10 @@ type WorkerNoteFormValues = {
   note?: string
 }
 
+type CancelRequestFormValues = {
+  reason?: string
+}
+
 function buildWorkerOrderQuery(status: string, keyword: string, page: number, pageSize: number) {
   return {
     keyword,
@@ -194,9 +200,11 @@ export default function WorkerOrdersPage() {
   const [detailOrder, setDetailOrder] = useState<WorkOrder | null>(null)
   const [editingOrder, setEditingOrder] = useState<WorkOrder | null>(null)
   const [noteOrder, setNoteOrder] = useState<WorkOrder | null>(null)
+  const [cancelRequestOrder, setCancelRequestOrder] = useState<WorkOrder | null>(null)
   const [acceptanceFiles, setAcceptanceFiles] = useState<UploadedFile[]>([])
   const [form] = Form.useForm<AcceptanceFormValues>()
   const [noteForm] = Form.useForm<WorkerNoteFormValues>()
+  const [cancelRequestForm] = Form.useForm<CancelRequestFormValues>()
 
   const ordersQuery = useQuery({
     queryKey: ['worker-my-orders', status, keyword, page, pageSize],
@@ -221,6 +229,11 @@ export default function WorkerOrdersPage() {
     queryFn: fetchWorkerMyOrderOverview,
     retry: false,
   })
+  const cancelRequestsQuery = useQuery({
+    queryKey: ['worker-cancel-requests'],
+    queryFn: fetchWorkerCancelRequests,
+    retry: false,
+  })
   const overviewByStatus = new Map(
     (overviewQuery.data?.data.items || []).map((item) => [item.status, item]),
   )
@@ -229,6 +242,7 @@ export default function WorkerOrdersPage() {
     await Promise.all([
       queryClient.invalidateQueries({ queryKey: ['worker-my-orders'] }),
       queryClient.invalidateQueries({ queryKey: ['worker-my-orders-overview'] }),
+      queryClient.invalidateQueries({ queryKey: ['worker-cancel-requests'] }),
     ])
   }
 
@@ -314,6 +328,27 @@ export default function WorkerOrdersPage() {
     noteForm.setFieldsValue({ note: String(order.workerNote || '') })
   }
 
+  function openCancelRequestModal(order: WorkOrder) {
+    markOrderAsRead(order)
+    setCancelRequestOrder(order)
+    cancelRequestForm.resetFields()
+  }
+
+  async function submitCancelRequest(values: CancelRequestFormValues) {
+    if (!cancelRequestOrder) return
+    try {
+      await submitWorkerCancelRequest(cancelRequestOrder.workOrderId, {
+        reason: String(values.reason || '').trim(),
+      })
+      message.success('取消申请已提交，等待客服审核')
+      setCancelRequestOrder(null)
+      cancelRequestForm.resetFields()
+      await refreshAll()
+    } catch (error) {
+      message.error(error instanceof Error ? error.message : '提交取消申请失败')
+    }
+  }
+
   async function saveOrderNote(values: WorkerNoteFormValues) {
     if (!noteOrder) return
     try {
@@ -644,6 +679,11 @@ export default function WorkerOrdersPage() {
             {canRemindAcceptance(row) ? (
               <Button onClick={() => submitAcceptanceReminder(row)}>催验收</Button>
             ) : null}
+            {canRequestCancel(row) ? (
+              <Button danger onClick={() => openCancelRequestModal(row)}>
+                申请取消
+              </Button>
+            ) : null}
           </Space>
         </div>
       ),
@@ -950,6 +990,11 @@ export default function WorkerOrdersPage() {
                             催验收
                           </Button>
                         ) : null}
+                        {canRequestCancel(order) ? (
+                          <Button size="small" danger onClick={() => openCancelRequestModal(order)}>
+                            申请取消
+                          </Button>
+                        ) : null}
                       </div>
                     </div>
                   </article>
@@ -1113,6 +1158,11 @@ export default function WorkerOrdersPage() {
                   {hasSubmittedAcceptance(detailOrder) ? '补充图片' : '上传图片 / 提交验收'}
                 </Button>
               ) : null}
+              {canRequestCancel(detailOrder) ? (
+                <Button danger onClick={() => openCancelRequestModal(detailOrder)}>
+                  申请取消
+                </Button>
+              ) : null}
             </Space>
           ) : null
         }
@@ -1229,6 +1279,46 @@ export default function WorkerOrdersPage() {
           </div>
         ) : null}
       </Drawer>
+      <Modal
+        title={`申请取消 · ${getDisplayOrderNo(cancelRequestOrder)}`}
+        open={Boolean(cancelRequestOrder)}
+        width={isMobile ? '92%' : 520}
+        onCancel={() => {
+          setCancelRequestOrder(null)
+          cancelRequestForm.resetFields()
+        }}
+        onOk={() => cancelRequestForm.submit()}
+        okText="提交申请"
+        destroyOnHidden
+      >
+        <Space direction="vertical" size={8} style={{ width: '100%', marginBottom: 16 }}>
+          <Typography.Text type="secondary">
+            提交后由客服审核；通过后退还本次冻结押金，订单或拼单份额将回到大厅。
+          </Typography.Text>
+          <Typography.Text type="secondary">
+            今日申请：{cancelRequestsQuery.data?.data.risk.dailyUsed || 0}/
+            {cancelRequestsQuery.data?.data.risk.dailyLimit || 5}；累计通过：
+            {cancelRequestsQuery.data?.data.risk.approvedTotal || 0} 次。
+          </Typography.Text>
+          <Typography.Text type="warning">
+            每累计 10 次通过申请最多降一级；VIP1 期间累计 5 次通过将封禁账号。
+          </Typography.Text>
+        </Space>
+        <Form form={cancelRequestForm} layout="vertical" onFinish={submitCancelRequest}>
+          <Form.Item
+            label="申请原因"
+            name="reason"
+            rules={[{ required: true, whitespace: true, message: '请填写申请取消原因' }]}
+          >
+            <Input.TextArea
+              rows={4}
+              maxLength={300}
+              showCount
+              placeholder="请说明无法继续处理的原因"
+            />
+          </Form.Item>
+        </Form>
+      </Modal>
       <Modal
         title={`订单备注 · ${getDisplayOrderNo(noteOrder)}`}
         open={Boolean(noteOrder)}
@@ -1382,6 +1472,16 @@ function canRemindAcceptance(order: WorkOrder) {
   return !order.myShare && order.status === 'pending_acceptance'
 }
 
+function canRequestCancel(order: WorkOrder) {
+  if (order.myShare) {
+    return (
+      ['joined', 'submitted'].includes(order.myShare.status) &&
+      ['open', 'pending_acceptance'].includes(order.status)
+    )
+  }
+  return order.status === 'in_progress'
+}
+
 function canAutoAcceptOrder(order: WorkOrder, workerCanAutoAcceptWithoutEvidence: boolean) {
   if (!workerCanAutoAcceptWithoutEvidence) return false
   if (order.myShare) return order.myShare.status === 'joined' && order.status !== 'accepted'

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

@@ -13,6 +13,7 @@ import type {
   WorkProductMatchLog,
   WorkerFinanceConfig,
   WorkerFinanceRequest,
+  WorkerCancelRequest,
   WorkerPlatformNotificationConfig,
   WorkerProductMatchConfig,
   WorkerLevel,
@@ -39,6 +40,28 @@ export function fetchAdminWorkerPlatformSummary() {
   }>('/api/v1/admin/worker-platform/summary')
 }
 
+export function fetchAdminWorkerCancelRequests(
+  status: 'pending' | 'approved' | 'rejected' = 'pending',
+) {
+  return apiGet<{ items: WorkerCancelRequest[] }>('/api/v1/admin/worker-platform/cancel-requests', {
+    status,
+  })
+}
+
+export function reviewAdminWorkerCancelRequest(
+  requestId: number,
+  payload: { approved: boolean; reviewNote: string },
+) {
+  return apiPost<{
+    request: WorkerCancelRequest
+    order: WorkOrder
+    approved: boolean
+    releasedDepositAmount: number
+    levelChanged: boolean
+    accountDisabled: boolean
+  }>(`/api/v1/admin/worker-platform/cancel-requests/${requestId}/review`, payload)
+}
+
 export function fetchAdminWorkerLevels() {
   return apiGet<{ items: WorkerLevel[] }>('/api/v1/admin/worker-platform/levels')
 }

apps/frontend/src/services/worker.ts

@@ -6,6 +6,8 @@ import type {
   WorkOrderEvent,
   WorkOrderShare,
   WorkerFinanceRequest,
+  WorkerCancelRequest,
+  WorkerCancelRequestRisk,
   WorkerHallOrdersResponse,
   WorkerLeaderboardResponse,
   WorkerLeaderboardPeriod,
@@ -211,6 +213,19 @@ export function fetchWorkerMyOrderEvents(workOrderId: number) {
   return apiGet<{ items: WorkOrderEvent[] }>(`/api/v1/worker/orders/${workOrderId}/events`)
 }
 
+export function fetchWorkerCancelRequests() {
+  return apiGet<{ risk: WorkerCancelRequestRisk; items: WorkerCancelRequest[] }>(
+    '/api/v1/worker/orders/cancel-requests',
+  )
+}
+
+export function submitWorkerCancelRequest(workOrderId: number, payload: { reason: string }) {
+  return apiPost<{ request: WorkerCancelRequest; risk: WorkerCancelRequestRisk }>(
+    `/api/v1/worker/orders/${workOrderId}/cancel-requests`,
+    payload,
+  )
+}
+
 export function markWorkerOrderRead(workOrderId: number) {
   return apiPost<{ viewedAt: string; isUnread: false }>(`/api/v1/worker/orders/${workOrderId}/read`)
 }

apps/frontend/src/types/worker-platform.ts

@@ -100,6 +100,31 @@ export type WorkerFinanceRequest = {
   }
 }
 
+export type WorkerCancelRequest = {
+  requestId: number
+  workOrderId: number
+  shareId: number | null
+  workerId: number
+  workOrderNo: string
+  productName: string
+  workerName: string
+  shareQuantity: number | null
+  reason: string
+  status: 'pending' | 'approved' | 'rejected' | string
+  reviewNote: string
+  reviewedBy: string
+  createdAt: string
+  reviewedAt: string | null
+}
+
+export type WorkerCancelRequestRisk = {
+  dailyUsed: number
+  dailyLimit: number
+  approvedTotal: number
+  nextPenaltyAt: number
+  remainingToPenalty: number
+}
+
 export type WorkerFinanceConfig = {
   depositUnfreezeDays: number
   recharge: {
@@ -125,6 +150,7 @@ export type WorkerPlatformNotificationEventKey =
   | 'acceptance_submitted'
   | 'acceptance_reminded'
   | 'material_required'
+  | 'cancel_requested'
 
 export type WorkerPlatformNotificationConfig = {
   events: Record<