feat: 正式结算单详情新增开票发票查看下载（金蝶回写直链）

- 发票信息卡片内新增只读开票发票表格（issuedInvoices，金蝶A303-5回写）
- 查看：数电PDF优先，退预览图/板式文件直链新窗口打开
- 下载：按直链扩展名命名，不经A801-2代理

src/views/settlement/components/formal-settlement-editor.vue

@@ -437,6 +437,30 @@
             </template>
           </el-table-column>
         </el-table>
+
+        <div v-if="issuedInvoices.length" class="formal-editor__issued-invoices">
+          <div class="formal-editor__issued-title">
+            开票发票（本结算单开票申请经金蝶开票回写，文件由金蝶发票云直链提供）
+          </div>
+          <el-table :data="issuedInvoices" border>
+            <el-table-column type="index" label="序号" width="64" align="center" />
+            <el-table-column prop="invoiceNo" label="发票号" min-width="150" align="center" />
+            <el-table-column prop="invoiceDate" label="开票日期" min-width="130" align="center">
+              <template #default="{ row }">{{ displayValue(row.invoiceDate) }}</template>
+            </el-table-column>
+            <el-table-column prop="invoiceAmount" label="价税合计" min-width="130" align="center">
+              <template #default="{ row }">{{ formatMoney(row.invoiceAmount) }}</template>
+            </el-table-column>
+            <el-table-column label="操作" width="160" align="center">
+              <template #default="{ row }">
+                <div class="formal-editor__links">
+                  <el-link type="primary" @click="viewIssuedInvoice(row)">查看</el-link>
+                  <el-link type="primary" @click="downloadIssuedInvoice(row)">下载</el-link>
+                </div>
+              </template>
+            </el-table-column>
+          </el-table>
+        </div>
       </section-card>
 
       <kingdee-invoice-pool-dialog
@@ -985,6 +1009,8 @@ export default {
       attachments: [],
       selectedAttachmentRows: [],
       invoices: [],
+      // 开票申请经金蝶回写的发票结果（只读展示，含板式文件/数电PDF下载地址）
+      issuedInvoices: [],
       invoiceClaimNo: '',
       invoiceClaimLoading: false,
       // 金蝶侧发票附件查看/下载进行中（行组级 loading 守卫）
@@ -1206,6 +1232,7 @@ export default {
       this.attachments = this.parseAttachments(data.attachmentsJson);
       this.selectedAttachmentRows = [];
       this.invoices = data.invoices || [];
+      this.issuedInvoices = data.issuedInvoices || [];
       this.sortAttachments();
       this.contracts = this.filterContracts(this.allContracts, this.form.projectId);
     },
@@ -1235,6 +1262,7 @@ export default {
       this.attachments = [];
       this.selectedAttachmentRows = [];
       this.invoices = [];
+      this.issuedInvoices = [];
       this.invoiceClaimNo = '';
       this.invoiceClaimDialog.visible = false;
       this.invoiceClaimDialog.selected = [];
@@ -2406,6 +2434,30 @@ export default {
       if (!url) return this.$message.warning('当前发票暂无可下载附件');
       downloadFileByUrl(url, this.invoiceAttachmentName(row));
     },
+    // 开票发票预览地址：数电PDF优先（OFD浏览器无法预览），退预览图、板式文件
+    issuedInvoicePreviewUrl(row) {
+      return row.invoicePdfFileUrl || row.invoiceImageUrl || row.invoiceFileUrl || '';
+    },
+    // 开票发票下载地址：数电PDF优先，退板式文件、数电XML
+    issuedInvoiceDownloadUrl(row) {
+      return row.invoicePdfFileUrl || row.invoiceFileUrl || row.invoiceXmlFileUrl || '';
+    },
+    // 下载文件名按直链扩展名推断（数电票 .pdf / 板式文件 .ofd|.pdf），缺省 .pdf
+    issuedInvoiceFileName(row, url) {
+      const match = String(url || '').split('?')[0].match(/\.([a-zA-Z0-9]+)$/);
+      const extension = match ? `.${match[1].toLowerCase()}` : '.pdf';
+      return `${row.invoiceNo || '发票'}${extension}`;
+    },
+    viewIssuedInvoice(row) {
+      const url = this.issuedInvoicePreviewUrl(row);
+      if (!url) return this.$message.warning('当前发票暂无可查看文件，可稍后重试开票结果同步');
+      window.open(url, '_blank');
+    },
+    downloadIssuedInvoice(row) {
+      const url = this.issuedInvoiceDownloadUrl(row);
+      if (!url) return this.$message.warning('当前发票暂无可下载文件，可稍后重试开票结果同步');
+      downloadFileByUrl(url, this.issuedInvoiceFileName(row, url));
+    },
     buildSavePayload() {
       return {
         id: this.form.id,
@@ -2887,6 +2939,14 @@ export default {
 .formal-editor__invoice-claim :deep(.el-input) {
   width: 360px;
 }
+.formal-editor__issued-invoices {
+  margin-top: 16px;
+}
+.formal-editor__issued-title {
+  margin-bottom: 8px;
+  color: var(--el-text-color-secondary);
+  font-size: 13px;
+}
 .formal-editor__negative-amount {
   color: var(--el-color-danger);
 }