feat: 台账导入页新增模板下载功能

- 各台账卡片「下载模板」按钮接入后端接口，可下载对应单表模板
- 合并导入区新增「下载合并模板」按钮，下载包含全部20个Sheet的合并模板

src/api/ledger/index.js

@@ -10,6 +10,12 @@ export function clearLedgerByTimeRange(params) {
   return request({ url: '/ledger/import/clear', method: 'delete', params })
 }
 
+// ===== 导入模板下载 =====
+// type 为空 → 合并模板（全部20个Sheet）；type=supervisionProblem 等 → 单台账模板
+export function downloadLedgerTemplate(params) {
+  return request({ url: '/ledger/template', method: 'get', params, responseType: 'blob' })
+}
+
 // ===== 台账一键导入 =====
 export function importSupervisionProblem(data) {
   return request({ url: '/ledger/import/supervisionProblem', method: 'post', data })

src/views/ledger/import/index.vue

@@ -15,17 +15,22 @@
             <div class="combined-desc">上传「旅检三部"三三"数字管理平台.xlsx」，系统将自动识别20个Sheet并分别导入对应台账表</div>
           </div>
         </div>
-        <el-upload
-          :action="''"
-          :auto-upload="false"
-          :show-file-list="false"
-          :on-change="handleCombinedChange"
-          accept=".xlsx,.xls"
-        >
-          <el-button type="primary" size="large" :loading="combinedLoading" class="combined-btn">
-            <el-icon><Upload /></el-icon> 选择文件并全量导入
+        <div class="combined-btns">
+          <el-upload
+            :action="''"
+            :auto-upload="false"
+            :show-file-list="false"
+            :on-change="handleCombinedChange"
+            accept=".xlsx,.xls"
+          >
+            <el-button type="primary" size="large" :loading="combinedLoading" class="combined-btn">
+              <el-icon><Upload /></el-icon> 选择文件并全量导入
+            </el-button>
+          </el-upload>
+          <el-button size="large" class="combined-tpl-btn" @click="downloadCombinedTemplate">
+            <el-icon><Download /></el-icon> 下载合并模板
           </el-button>
-        </el-upload>
+        </div>
       </div>
       <div v-if="combinedResult" class="combined-result">
         <div class="result-title">导入结果：</div>
@@ -123,7 +128,7 @@
 import { ref, reactive } from 'vue'
 import { ElMessage, ElMessageBox } from 'element-plus'
 import { Upload, Download, Document, DocumentChecked, Warning, Trophy, UserFilled, Ticket, DataAnalysis, Histogram, Medal, Memo, Money, Calendar, Flag, Files, Reading, Management, FirstAidKit, House, Bell, Delete, DeleteFilled } from '@element-plus/icons-vue'
-import { importCombinedLedger, clearLedgerByTimeRange } from '@/api/ledger/index'
+import { importCombinedLedger, clearLedgerByTimeRange, downloadLedgerTemplate } from '@/api/ledger/index'
 import {
   importSupervisionProblem,
   importPatrolInspection,
@@ -420,8 +425,35 @@ async function handleFileChange(uploadFile, item) {
   }
 }
 
-function downloadTemplate(item) {
-  ElMessage.info('模板文件功能开发中，请联系管理员获取模板')
+async function downloadTemplate(item) {
+  try {
+    const res = await downloadLedgerTemplate({ type: item.key })
+    triggerDownload(res, item.title + '_导入模板.xlsx')
+  } catch {
+    ElMessage.error('模板下载失败')
+  }
+}
+
+async function downloadCombinedTemplate() {
+  try {
+    const res = await downloadLedgerTemplate({})
+    triggerDownload(res, '旅检三部三三数字管理平台_模板.xlsx')
+  } catch {
+    ElMessage.error('合并模板下载失败')
+  }
+}
+
+function triggerDownload(blob, fileName) {
+  const url = URL.createObjectURL(new Blob([blob], {
+    type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
+  }))
+  const a = document.createElement('a')
+  a.href = url
+  a.download = fileName
+  document.body.appendChild(a)
+  a.click()
+  document.body.removeChild(a)
+  URL.revokeObjectURL(url)
 }
 </script>
 
@@ -483,12 +515,24 @@ function downloadTemplate(item) {
     max-width: 580px;
   }
 
+  .combined-btns {
+    display: flex;
+    gap: 10px;
+    align-items: center;
+    flex-wrap: wrap;
+  }
+
   .combined-btn {
     min-width: 180px;
     height: 44px;
     font-size: 15px;
   }
 
+  .combined-tpl-btn {
+    height: 44px;
+    font-size: 14px;
+  }
+
   .combined-result {
     margin-top: 14px;
     padding-top: 14px;