新增复制单个链接功能，优化批次下载对话框逻辑，提升用户体验

src/views/links/LinkGenerate.vue

@@ -451,6 +451,14 @@
             <el-icon><Download /></el-icon>
             立即下载
           </el-button>
+          <el-button 
+            v-if="batchDownloadDialog.count === 1" 
+            type="success" 
+            @click="copyCurrentBatchSingleLink"
+          >
+            <el-icon><DocumentCopy /></el-icon>
+            复制
+          </el-button>
         </div>
       </template>
     </el-dialog>
@@ -571,7 +579,8 @@ const batchDownloadDialog = reactive({
   visible: false,
   downloading: false,
   batchId: '',
-  count: 0
+  count: 0,
+  singleCodeNo: ''
 })
 
 // 状态选项
@@ -630,7 +639,8 @@ const handleGenerate = async () => {
     
     // 弹出批次下载对话框
     if (result && result.batchId && result.codeNos && result.codeNos.length > 0) {
-      showBatchDownloadDialog(result.batchId, result.codeNos.length)
+      const maybeSingle = result.codeNos.length === 1 ? result.codeNos[0] : ''
+      showBatchDownloadDialog(result.batchId, result.codeNos.length, maybeSingle)
     }
     
     // 重置表单
@@ -971,10 +981,11 @@ const closeBatchDeleteByStatusDialog = () => {
 }
 
 // 批次下载对话框相关方法
-const showBatchDownloadDialog = (batchId, count) => {
+const showBatchDownloadDialog = (batchId, count, singleCodeNo = '') => {
   batchDownloadDialog.visible = true
   batchDownloadDialog.batchId = batchId
   batchDownloadDialog.count = count
+  batchDownloadDialog.singleCodeNo = singleCodeNo
   batchDownloadDialog.downloading = false
 }
 
@@ -983,6 +994,7 @@ const closeBatchDownloadDialog = () => {
   batchDownloadDialog.batchId = ''
   batchDownloadDialog.count = 0
   batchDownloadDialog.downloading = false
+  batchDownloadDialog.singleCodeNo = ''
 }
 
 const downloadCurrentBatch = async () => {
@@ -1038,6 +1050,13 @@ const downloadCurrentBatch = async () => {
   }
 }
 
+// 复制本次单个链接
+const copyCurrentBatchSingleLink = async () => {
+  if (batchDownloadDialog.count !== 1 || !batchDownloadDialog.singleCodeNo) return
+  const url = generateLinkUrl(batchDownloadDialog.singleCodeNo)
+  await copyToClipboard(url)
+}
+
 const handleBatchDeleteByStatus = async () => {
   try {
     // 表单验证
@@ -1570,6 +1589,13 @@ onUnmounted(() => {
   text-align: center;
 }
 
+/* 批次下载对话框按钮区域布局（桌面端） */
+.batch-download-dialog .dialog-footer {
+  display: flex;
+  gap: 8px;
+  justify-content: flex-end;
+}
+
 .download-content {
   padding: 20px 0;
 }
@@ -1626,6 +1652,16 @@ onUnmounted(() => {
   .info-text p {
     font-size: 13px;
   }
+
+  /* 批次下载对话框按钮区域布局（移动端） */
+  .batch-download-dialog .dialog-footer {
+    flex-direction: column;
+  }
+
+  .batch-download-dialog .dialog-footer .el-button {
+    width: 100%;
+    height: 44px;
+  }
 }
 
 @media (max-width: 480px) {