feat(pl): allocate copy_seq_no on first driver plan share-to-group

Add ensure-copy-seq API and miniprogram clipboard prefix so each plan
gets a tenant-scoped fixed serial on first copy; cover allocation with
unit tests and refresh the backend graph.

Co-authored-by: Cursor <cursoragent@cursor.com>

miniprogram/pages/pl/driver-plan/detail.vue

@@ -281,9 +281,23 @@ function promptCopyAfterSave() {
       cancelText: '关闭',
       success: async (res) => {
         if (res.confirm) {
-          const ok = await copyDriverPlanToClipboard(page.value || {})
-          if (ok) {
-            setTimeout(() => goList(), 400)
+          try {
+            const ensured = await driverPlanApi.ensureCopySeq(planId.value)
+            const copySeqNo = ensured?.copySeqNo ?? ensured?.copy_seq_no
+            if (copySeqNo == null || copySeqNo === '') {
+              uni.showToast({ title: '复制失败', icon: 'none' })
+              resolve()
+              return
+            }
+            const ok = await copyDriverPlanToClipboard({
+              ...(page.value || {}),
+              copySeqNo
+            })
+            if (ok) {
+              setTimeout(() => goList(), 400)
+            }
+          } catch (e) {
+            uni.showToast({ title: '复制失败', icon: 'none' })
           }
         }
         resolve()

miniprogram/pages/pl/driver-plan/list.vue

@@ -240,9 +240,14 @@ async function handleCopy(row) {
   }
   uni.showLoading({ title: '加载中...', mask: true })
   try {
-    const page = await driverPlanApi.get(id)
+    const page = (await driverPlanApi.get(id)) || {}
+    const ensured = await driverPlanApi.ensureCopySeq(id)
+    const copySeqNo = ensured?.copySeqNo ?? ensured?.copy_seq_no
+    if (copySeqNo == null || copySeqNo === '') {
+      throw new Error('no seq')
+    }
     uni.hideLoading()
-    await copyDriverPlanToClipboard(page || {})
+    await copyDriverPlanToClipboard({ ...page, copySeqNo })
   } catch (e) {
     uni.hideLoading()
     uni.showToast({ title: '复制失败', icon: 'none' })