feat:拼单明细管理加一个撤份额的功能，指定数量

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

@@ -72,6 +72,7 @@ import {
   markAdminWorkOrderShareProblem,
   pinAdminWorkOrder,
   publishAdminWorkOrder,
+  reduceAdminWorkOrderShareQuantity,
   reopenAdminCancelledWorkOrder,
   resetAdminWorkOrderGiftMaterial,
   resolveAdminProblemWorkOrder,
@@ -306,6 +307,7 @@ export default function WorkOrdersPanel() {
   const [materialPasteText, setMaterialPasteText] = useState('')
   const [sharingOrder, setSharingOrder] = useState<WorkOrder | null>(null)
   const [cancelShare, setCancelShare] = useState<WorkOrderShare | null>(null)
+  const [reduceShare, setReduceShare] = useState<WorkOrderShare | null>(null)
   const [problemShare, setProblemShare] = useState<WorkOrderShare | null>(null)
   const [disposeShare, setDisposeShare] = useState<WorkOrderShare | null>(null)
   const [cancelSharingOrder, setCancelSharingOrder] = useState<WorkOrder | null>(null)
@@ -320,6 +322,7 @@ export default function WorkOrdersPanel() {
   const [materialForm] = Form.useForm<MaterialFormValues>()
   const [cancelForm] = Form.useForm<CancelOrderFormValues>()
   const [cancelShareForm] = Form.useForm<CancelShareFormValues>()
+  const [reduceShareForm] = Form.useForm<{ reduceQuantity?: number; note?: string }>()
   const [problemShareForm] = Form.useForm<{ note?: string }>()
   const [disposeShareForm] = Form.useForm<{
     action?: 'return_to_worker' | 'reopen' | 'cancel_release' | 'cancel_deduct'
@@ -725,6 +728,32 @@ export default function WorkOrdersPanel() {
     cancelShareForm.resetFields()
   }
 
+  /** 按份数撤销部分份额：减少的份数回到大厅，押金保持冻结。 */
+  async function submitReduceShare(values: { reduceQuantity?: number; note?: string }) {
+    if (!sharingOrder || !reduceShare) return
+    const workOrderId = sharingOrder.workOrderId
+    const reduceQuantity = Math.floor(Number(values.reduceQuantity || 0))
+    if (!Number.isFinite(reduceQuantity) || reduceQuantity <= 0) {
+      message.warning('请填写要撤掉的份数')
+      return
+    }
+    const keepQuantity = Math.max(0, reduceShare.quantity - reduceQuantity)
+    const succeeded = await runAction(
+      () =>
+        reduceAdminWorkOrderShareQuantity(workOrderId, reduceShare.shareId, {
+          reduceQuantity,
+          note: String(values.note || '').trim(),
+        }),
+      `已撤掉 ${reduceQuantity} 份，保留 ${keepQuantity} 份继续履约`,
+    )
+    if (!succeeded) return
+    await queryClient.invalidateQueries({
+      queryKey: ['admin-worker-platform-order-sharing', workOrderId],
+    })
+    setReduceShare(null)
+    reduceShareForm.resetFields()
+  }
+
   /** 按份额标记问题单：只影响该打手，母单状态不变。备注选填。 */
   async function submitProblemShare(values: { note?: string }) {
     if (!sharingOrder || !problemShare) return
@@ -3083,9 +3112,11 @@ export default function WorkOrdersPanel() {
         onCancel={() => {
           setSharingOrder(null)
           setCancelShare(null)
+          setReduceShare(null)
           setCancelSharingOrder(null)
           sharingForm.resetFields()
           cancelShareForm.resetFields()
+          reduceShareForm.resetFields()
           cancelSharingForm.resetFields()
         }}
         onOk={() => sharingForm.submit()}
@@ -3218,7 +3249,7 @@ export default function WorkOrdersPanel() {
                     loading={sharingQuery.isFetching}
                     pagination={false}
                     tableLayout="fixed"
-                    scroll={{ x: 1624 }}
+                    scroll={{ x: 1794 }}
                     rowClassName={(share) =>
                       share.problemMarked
                         ? 'admin-share-row-problem'
@@ -3363,6 +3394,27 @@ export default function WorkOrdersPanel() {
                           )
                         },
                       },
+                      {
+                        title: '撤单记录',
+                        width: 170,
+                        render: (_, share) => {
+                          // 份数前缀由展示层拼接：接口只给结构化的份数与原因文本
+                          const cancelledQuantity = Math.max(
+                            0,
+                            Math.floor(Number(share.cancelQuantity || 0)),
+                          )
+                          const note = String(share.cancelNote || '').trim()
+                          if (!cancelledQuantity && !note) return '-'
+                          const text = cancelledQuantity
+                            ? `撤 ${cancelledQuantity} 份${note ? ` · ${note}` : ''}`
+                            : note
+                          return (
+                            <Typography.Text style={{ fontSize: 12 }} ellipsis={{ tooltip: text }}>
+                              {text}
+                            </Typography.Text>
+                          )
+                        },
+                      },
                       {
                         title: '操作',
                         width: 300,
@@ -3451,6 +3503,24 @@ export default function WorkOrdersPanel() {
                                   单人撤单
                                 </Button>
                               ) : null}
+                              {(share.status === 'joined' || share.status === 'submitted') &&
+                              share.quantity >= 2 ? (
+                                <Button
+                                  danger
+                                  size="small"
+                                  icon={<UndoOutlined />}
+                                  title="按份数撤销部分份额：减少的份数立即回到大厅，押金保持冻结，验收资料保留"
+                                  onClick={() => {
+                                    setReduceShare(share)
+                                    reduceShareForm.setFieldsValue({
+                                      reduceQuantity: 1,
+                                      note: '',
+                                    })
+                                  }}
+                                >
+                                  撤份额
+                                </Button>
+                              ) : null}
                               {problemAction}
                             </Space>
                           )
@@ -3496,6 +3566,75 @@ export default function WorkOrdersPanel() {
         ) : null}
       </Modal>
 
+      <Modal
+        title={`撤份额 · ${reduceShare?.worker?.displayName || reduceShare?.worker?.username || ''}`}
+        open={Boolean(reduceShare)}
+        okText="确认撤销"
+        cancelText="取消"
+        okButtonProps={{ danger: true }}
+        onCancel={() => {
+          setReduceShare(null)
+          reduceShareForm.resetFields()
+        }}
+        onOk={() => reduceShareForm.submit()}
+        destroyOnHidden
+      >
+        {reduceShare ? (
+          <Form
+            form={reduceShareForm}
+            layout="vertical"
+            initialValues={{ reduceQuantity: 1 }}
+            onFinish={submitReduceShare}
+          >
+            <Alert
+              showIcon
+              type="warning"
+              message={`将从该打手的 ${reduceShare.quantity} 份中撤掉指定份数`}
+              description="撤掉的份数会立刻回到抢单大厅；押金保持原冻结额不退还；验收资料保留，之后仍可单独验收剩余份数。"
+              style={{ marginBottom: 16 }}
+            />
+            <Form.Item
+              label={`撤掉份数（1 ~ ${Math.max(1, reduceShare.quantity - 1)} 份）`}
+              name="reduceQuantity"
+              rules={[{ required: true, message: '请填写要撤掉的份数' }]}
+            >
+              <InputNumber
+                min={1}
+                max={Math.max(1, reduceShare.quantity - 1)}
+                precision={0}
+                addonAfter="份"
+                style={{ width: '100%' }}
+              />
+            </Form.Item>
+            <Form.Item noStyle shouldUpdate>
+              {() => {
+                const reduceQuantity = Math.floor(
+                  Number(reduceShareForm.getFieldValue('reduceQuantity') || 0),
+                )
+                const boundedReduce = Math.max(
+                  0,
+                  Math.min(Math.max(0, reduceShare.quantity - 1), reduceQuantity),
+                )
+                const keepQuantity = Math.max(0, reduceShare.quantity - boundedReduce)
+                return (
+                  <Typography.Text type="secondary">
+                    调整后保留 {keepQuantity} 份，回到大厅 {boundedReduce} 份；剩余份额报酬{' '}
+                    {formatMoney(keepQuantity * Number(reduceShare.unitReward || 0))}
+                  </Typography.Text>
+                )
+              }}
+            </Form.Item>
+            <Form.Item label="撤销原因（选填）" name="note">
+              <Input.TextArea
+                rows={3}
+                maxLength={200}
+                placeholder="如：打手账号实际只能赠送 5 份"
+              />
+            </Form.Item>
+          </Form>
+        ) : null}
+      </Modal>
+
       <Modal
         title={`标记份额问题单 · ${
           problemShare?.worker?.displayName || problemShare?.worker?.username || ''