修改文档展示信息

src/views/SearchPage.vue

@@ -46,12 +46,14 @@
     >
       <div v-loading="previewLoading" class="preview-container">
         <iframe
-          v-if="previewIframeUrl && !previewLoading"
+          v-if="previewIframeUrl"
           :src="previewIframeUrl"
           class="preview-iframe"
           frameborder="0"
+          @load="previewLoading = false"
+          @error="previewLoading = false"
         ></iframe>
-        <el-empty v-if="!previewIframeUrl && !previewLoading" description="无法预览此文档" />
+        <el-empty v-if="!previewIframeUrl" description="无法预览此文档" />
       </div>
     </el-dialog>
   </div>
@@ -365,33 +367,12 @@ async function handlePreview(item: any) {
   previewLoading.value = true
   previewVisible.value = true
 
-  const url = `/api/v1/retrieval/files/preview?file_url=${encodeURIComponent(item.file_url)}`
-
-  try {
-    const resp = await fetch(url)
-    if (!resp.ok) {
-      const err = await resp.json().catch(() => ({}))
-      throw new Error(err.message || `预览失败 (${resp.status})`)
-    }
-
-    const contentType = resp.headers.get('content-type') || 'application/pdf'
-    const arrayBuffer = await resp.arrayBuffer()
-    const blob = new Blob([arrayBuffer], { type: contentType })
-    const blobUrl = URL.createObjectURL(blob)
-    previewIframeUrl.value = blobUrl
-  } catch (e: any) {
-    ElMessage.error(e.message || '预览失败')
-    previewVisible.value = false
-  } finally {
-    previewLoading.value = false
-  }
+  // 直接把后端预览接口当做 iframe 的 src，浏览器原生渲染 PDF
+  previewIframeUrl.value = `/api/v1/retrieval/files/preview?file_url=${encodeURIComponent(item.file_url)}`
 }
 
 function closePreview() {
   previewVisible.value = false
-  if (previewIframeUrl.value) {
-    URL.revokeObjectURL(previewIframeUrl.value)
-  }
   previewIframeUrl.value = ''
 }
 
@@ -484,7 +465,6 @@ async function doSearch() {
     const data = res.data
     if (data) {
       results.value = data.objs || []
-      // 使用外部 API 返回的 total_count
       totalCount.value = data.total_count || 0
     } else {
       results.value = []