[前端] 修复PDF加载：直接用axios获取arraybuffer，绕过blob处理问题

chat_web_front/src/views/reading/index.vue

@@ -217,6 +217,7 @@ import Loading from "@/components/Loading.vue";
 import {UploadFilled} from '@element-plus/icons-vue';
 import {ElMessage, ElMessageBox, type UploadFile, type UploadFiles} from "element-plus";
 import Mark from "mark.js";
+import axios from '@/utils/request/axios';
 
 // ===================== 面板尺寸与折叠 =====================
 const leftWidth = ref(280);
@@ -437,10 +438,11 @@ const loadPdfFile = async () => {
   if (!selectedFile.value) return;
   docHtml.value = '';
   try {
-    const resp = await downloadFile({ fileId: selectedFile.value.fileId });
-    const blob = new Blob([resp]);
-    const arrayBuffer = await blob.arrayBuffer();
-    pdfData.value = arrayBuffer;
+    const resp = await axios.get('/gpt/file/downloadFile', {
+      params: { fileId: selectedFile.value.fileId },
+      responseType: 'arraybuffer'
+    });
+    pdfData.value = resp.data;
   } catch (e: any) {
     pdfData.value = null;
     docHtml.value = '<p style="color:#999;text-align:center;margin-top:40px;">PDF 文件加载失败</p>';