fix(knowledge): make protected file downloads WebView-safe

mobile-uni/src/pages/user/sop/index.vue

@@ -229,7 +229,7 @@
                   <view class="resource-copy">
                     <text class="resource-title">{{ resource.title }}</text>
                     <text class="resource-meta">
-                      {{ resource.loading ? '正在安全读取…' : resource.type === 'VIDEO' ? (resource.localUrl ? '已加载，可直接播放' : '点击加载操作视频') : '点击查看或下载原文件' }}
+                      {{ resource.loading ? (resource.type === 'VIDEO' ? '正在安全读取…' : '正在生成安全下载链接…') : resource.type === 'VIDEO' ? (resource.localUrl ? '已加载，可直接播放' : '点击加载操作视频') : '点击下载原文件' }}
                     </text>
                   </view>
                   <text class="resource-arrow">›</text>
@@ -423,6 +423,7 @@ import {
   chooseKnowledgeMedia,
   generateSummaryCard,
   queryKnowledgeTool,
+  requestKnowledgeResourceDownloadLink,
   searchKnowledge,
   searchKnowledgeWithMedia,
   submitAnswerFeedback
@@ -1206,24 +1207,36 @@ const openKnowledgeResource = async (resource: KnowledgeResource) => {
   if (resource.type === 'VIDEO' && resource.localUrl) return;
   resource.loading = true;
   try {
+    if (resource.type === 'FILE') {
+      const downloadUrl = await requestKnowledgeResourceDownloadLink(resource.attachmentId);
+      if (typeof document !== 'undefined') {
+        const link = document.createElement('a');
+        link.href = downloadUrl;
+        link.target = '_blank';
+        link.rel = 'noreferrer';
+        document.body.appendChild(link);
+        link.click();
+        link.remove();
+        return;
+      }
+      uni.downloadFile({
+        url: downloadUrl,
+        success: (response) => {
+          if (response.statusCode >= 200 && response.statusCode < 300 && response.tempFilePath) {
+            uni.openDocument({ filePath: response.tempFilePath, showMenu: true });
+            return;
+          }
+          uni.showToast({ title: '文件下载失败，请稍后重试', icon: 'none' });
+        },
+        fail: () => uni.showToast({ title: '文件下载失败，请稍后重试', icon: 'none' })
+      });
+      return;
+    }
     const localUrl = await authenticatedFileUrl(resource.contentUrl);
     if (resource.localUrl && resource.localUrl !== localUrl) {
       releaseAuthenticatedFileUrl(resource.localUrl);
     }
     resource.localUrl = localUrl;
-    if (resource.type === 'FILE') {
-      if (typeof document !== 'undefined') {
-        const link = document.createElement('a');
-        link.href = localUrl;
-        link.download = resource.title || '资料文件';
-        link.target = '_blank';
-        document.body.appendChild(link);
-        link.click();
-        link.remove();
-      } else {
-        uni.openDocument({ filePath: localUrl, showMenu: true });
-      }
-    }
   } catch (error) {
     uni.showToast({ title: requestErrorText(error, '资料读取失败'), icon: 'none' });
   } finally {