fix(web-admin): harden contract product validation and fetch race

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

web-admin/src/components/business/pl-plan-form-dialog/index.vue

@@ -513,6 +513,8 @@
   const productSelectorVisible = ref(false)
   /** 当前装货合同明细中的 CRM productId（非内部客户限制选品） */
   const loadContractProductIds = ref<string[]>([])
+  /** 装货合同明细拉取序号，避免快速换合同时旧响应覆盖新结果 */
+  let loadContractFetchSeq = 0
   /**
    * 内部客户：undefined → ProductSelector 全量目录
    * 非内部：始终传 string[]（合同无明细时为 []）→ 受限模式，勿与「未传」混淆
@@ -1017,16 +1019,22 @@
       const id = String(contracts?.[0]?.contractId || '').trim()
       const prevId = String(prev?.[0]?.contractId || '').trim()
       if (!id) {
+        loadContractFetchSeq += 1
         loadContractProductIds.value = []
         return
       }
+      const seq = ++loadContractFetchSeq
+      let allowedIds: string[] = []
       try {
         const res = await getContract(id)
+        if (seq !== loadContractFetchSeq) return
         const detail = pickBxData<{ products?: Array<{ productId?: string | null }> }>(res)
-        loadContractProductIds.value = collectContractProductIds(detail?.products || [])
+        allowedIds = collectContractProductIds(detail?.products || [])
       } catch {
-        loadContractProductIds.value = []
+        if (seq !== loadContractFetchSeq) return
+        allowedIds = []
       }
+      loadContractProductIds.value = allowedIds
       // 合同 id 变化时过滤装货产品（详情首次灌入同 id / 加载中不刷）
       if (
         prev &&
@@ -1036,7 +1044,7 @@
       ) {
         const nextProducts = filterProductsByAllowedProductIds(
           loadForm.value.products || [],
-          loadContractProductIds.value
+          allowedIds
         )
         loadForm.value = { ...loadForm.value, products: nextProducts }
         syncFromLoadProducts()
@@ -1739,16 +1747,22 @@
     }
     if (
       !isPlInternalCustomerName(loadForm.value.customerName) &&
-      (loadForm.value.contracts || []).length === 1 &&
-      loadContractProductIds.value.length
+      (loadForm.value.contracts || []).length === 1
     ) {
-      const allowed = new Set(loadContractProductIds.value.map((id) => String(id).trim()))
-      const orphan = (loadForm.value.products || []).some(
-        (row) => !allowed.has(String(row.productId || '').trim())
-      )
-      if (orphan) {
-        ElMessage.warning('装货产品须属于所选合同')
-        return false
+      const products = loadForm.value.products || []
+      if (products.length) {
+        const allowed = new Set(
+          loadContractProductIds.value.map((id) => String(id).trim()).filter(Boolean)
+        )
+        if (!allowed.size) {
+          ElMessage.warning('所选合同暂无产品明细，或合同明细加载失败，请重选合同后再保存')
+          return false
+        }
+        const orphan = products.some((row) => !allowed.has(String(row.productId || '').trim()))
+        if (orphan) {
+          ElMessage.warning('装货产品须属于所选合同')
+          return false
+        }
       }
     }
     return true