feat(router): 新增PDF预览独立页面并优化预览体验

将PDF预览从弹窗改为独立页面，提升大文件加载体验
添加返回课程详情页功能并保持学习资料弹窗状态
优化PDF组件关闭逻辑和错误处理

 <!--
  * @Date: 2025-01-21
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-10-22 09:57:57
+ * @LastEditTime: 2025-10-22 10:49:55
  * @FilePath: /mlaj/src/components/ui/PdfViewer.vue
  * @Description: PDF预览组件 - 使用pdf-vue3库
 -->
@@ -345,7 +345,7 @@ const handleClose = () => {
 
     // 使用nextTick确保在DOM更新前完成清理
     nextTick(() => {
-        emit('update:show', false);
+        emit('onClose', true);
     });
 };
 

@@ -226,6 +226,14 @@ export const routes = [
     }
   },
   {
+    path: '/pdfPreview',
+    name: 'PdfPreview',
+    component: () => import('@/views/study/PdfPreviewPage.vue'),
+    meta: {
+      title: 'PDF预览',
+    }
+  },
+  {
     path: '/profile/studyCourse/:id',
     component: () => import('@/views/profile/StudyCoursePage.vue'),
     meta: {

+<!--
+ * @Date: 2025-10-22 10:45:51
+ * @LastEditors: hookehuyr hookehuyr@gmail.com
+ * @LastEditTime: 2025-10-22 10:54:10
+ * @FilePath: /mlaj/src/views/study/PdfPreviewPage.vue
+ * @Description: 文件描述
+-->
+<template>
+  <div class="pdf-preview-page">
+    <PdfViewer :show="true" :url="pdfUrl" :title="pdfTitle" @onClose="handleClose" />
+  </div>
+</template>
+
+<script setup>
+import { computed } from 'vue'
+import { useRoute, useRouter } from 'vue-router'
+import PdfViewer from '@/components/ui/PdfViewer.vue'
+
+const route = useRoute()
+const router = useRouter()
+
+// 从路由查询参数获取PDF的URL和标题
+const pdfUrl = computed(() => {
+  const url = route.query.url || ''
+  // 兼容可能存在的编码
+  return typeof url === 'string' ? decodeURIComponent(url) : ''
+})
+
+const pdfTitle = computed(() => {
+  const title = route.query.title || ''
+  return typeof title === 'string' ? decodeURIComponent(title) : ''
+})
+
+const handleClose = () => {
+  const returnId = route.query.returnId
+  const openMaterials = route.query.openMaterials
+  if (returnId) {
+    // 使用 replace 跳回学习详情页并打开学习资料弹框，避免历史中保留PDF预览
+    router.replace({ path: `/studyDetail/${returnId}`, query: { openMaterials: openMaterials || '1' } })
+  } else {
+    // 无返回ID时，使用 replace 导航到学习页，避免返回进入PDF预览
+    router.replace({ path: '/study' })
+  }
+}
+</script>
+
+<style scoped>
+.pdf-preview-page {
+  height: 100vh;
+  width: 100vw;
+  background: #fff;
+  display: flex;
+  flex-direction: column;
+}
+</style>

@@ -260,8 +260,7 @@
             </div>
         </van-popup>
 
-        <!-- PDF预览 -->
-        <PdfViewer v-model:show="pdfShow" :url="pdfUrl" :title="pdfTitle" @onLoad="onPdfLoad" @onProgress="onPdfProgress" @onComplete="onPdfComplete" />
+        <!-- PDF预览改为独立页面，点击资源时跳转到 /pdfPreview -->
 
         <!-- Office 文档预览弹窗 -->
         <van-popup
@@ -877,7 +876,10 @@ const popupVideoPlayerRef = ref(null); // 弹窗视频播放器引用
 const showPdf = ({ title, url, meta_id }) => {
     pdfTitle.value = title;
     pdfUrl.value = url;
-    pdfShow.value = true;
+    // 跳转到PDF预览页面，并带上返回的课程ID和打开资料弹框的标记
+    const encodedUrl = encodeURIComponent(url);
+    const encodedTitle = encodeURIComponent(title);
+    router.replace({ name: 'PdfPreview', query: { url: encodedUrl, title: encodedTitle, returnId: courseId.value, openMaterials: '1' } });
     // 新增记录
     let paramsObj = {
         schedule_id: courseId.value,
@@ -1270,6 +1272,22 @@ const downloadFailInfo = ref({
 // 学习资料弹窗状态
 const showMaterialsPopup = ref(false);
 
+// 路由参数监听：如果openMaterials=1，则打开学习资料弹框
+watch(() => route.query.openMaterials, (val) => {
+    if (val === '1' || val === 1 || val === true) {
+        showMaterialsPopup.value = true;
+    }
+}, { immediate: true });
+
+// 监听弹框关闭：关闭时移除URL中的openMaterials参数，防止刷新再次打开
+watch(showMaterialsPopup, (val, oldVal) => {
+    if (oldVal && !val) {
+        const newQuery = { ...route.query };
+        delete newQuery.openMaterials;
+        router.replace({ path: route.path, query: newQuery });
+    }
+});
+
 /**
  * 复制文件地址到剪贴板
  * @param {string} url - 要复制的文件地址