feat: Study 页面学习材料 Markdown 渲染

- 接口 materialURL/materialUrl，移除 lastLearningStatus
- 新增 Markdown 渲染函数：支持 [text](url) 和裸链接
- 学习材料区从 URL 列表改为 HTML 渲染展示
- 任务描述从只读 textarea 改为纯文本段落
- 优化 detail-block 分隔线、label 样式
- material-content 链接样式（绿色虚线+箭头图标）
- 微调统计标签/数值字号

src/components/Study.vue

@@ -19,8 +19,7 @@ import { getUrlTitle } from "@/utils/fetchTitle";
 interface TaskItem {
   title: string;
   description: string;
-  materialURL: string;
-  lastLearningStatus: string;
+  materialUrl: string;
   priority: number | string;
   taskNum: string;
   taskId: number;
@@ -52,17 +51,32 @@ const selectedTask = computed(() =>
   tasks.value.find((item) => item.taskId === selectedTaskId.value) || null
 );
 
-// 多 URL 支持
-const urlList = computed(() => {
-  const raw = selectedTask.value?.materialURL || "";
-  return raw.split(/\r?\n/).map((s) => s.trim()).filter((s) => s.startsWith("http"));
+const escapeHtml = (s: string) => s.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+const escapeAttr = (s: string) => s.replace(/"/g, "&quot;").replace(/&/g, "&amp;");
+
+function renderMarkdown(raw: string): string {
+  if (!raw.trim()) return "";
+  let html = raw;
+  const links: string[] = [];
+  html = html.replace(/\[([^\]]+)\]\(([^)]+)\)/g, (_m: string, text: string, url: string) => {
+    const tag = `<a href="${escapeAttr(url)}" target="_blank" rel="noopener">${escapeHtml(text)}</a>`;
+    links.push(tag);
+    return `__LINK_${links.length - 1}__`;
   });
-const urlTitles = ref<string[]>([]);
-async function loadUrlTitles() {
-  const urls = urlList.value;
-  if (urls.length === 0) { urlTitles.value = []; return; }
-  urlTitles.value = await fetchTitles(urls);
+  html = html.replace(/https?:\/\/[^\s)\u3001\uFF09\u300D\u300B<>]+/g, (url) => {
+    const clean = url.replace(/[.。,，;；!！？?？）］」》]]+$/, "");
+    const tag = `<a href="${escapeAttr(clean)}" target="_blank" rel="noopener">${escapeHtml(clean)}</a>`;
+    links.push(tag);
+    return `__LINK_${links.length - 1}__`;
+  });
+  html = html.replace(/\n/g, "<br>");
+  for (let i = 0; i < links.length; i++) {
+    html = html.replace(`__LINK_${i}__`, links[i]);
   }
+  return html;
+}
+
+const materialHtml = computed(() => renderMarkdown(selectedTask.value?.materialUrl || ""));
 
 const formatEffectiveTime = (seconds: number): string => {
   if (!seconds || seconds <= 0) return "0分钟";
@@ -141,8 +155,7 @@ const fetchTasks = async () => {
     tasks.value = (res?.data?.records || []).map((record: any) => ({
       title: record.taskName,
       description: record.taskDescription || "",
-      materialURL: record.materialURL || record.materialUrl || "",
-      lastLearningStatus: record.lastLearningStatus || "未开始",
+      materialUrl: record.materialUrl || "",
       priority: Number.isFinite(record.taskPriority) ? Math.round(record.taskPriority) : "-",
       taskNum: record.taskNum,
       taskId: record.id,
@@ -324,7 +337,6 @@ onMounted(() => {
               <span class="task-priority">{{ item.priority }}</span>
               {{ item.title }}
             </p>
-            <p class="task-meta">状态：{{ item.lastLearningStatus }}</p>
           </div>
         </el-scrollbar>
       </aside>
@@ -339,18 +351,12 @@ onMounted(() => {
 
             <div class="detail-block">
               <p class="label">任务描述</p>
-              <el-input type="textarea" :model-value="selectedTask.description" :rows="4" readonly />
+              <p class="description-text">{{ selectedTask.description || '暂无描述' }}</p>
             </div>
 
             <div class="detail-block">
               <p class="label">学习材料</p>
-              <div v-if="urlList.length > 0" class="material-list">
-                <div v-for="(url, i) in urlList" :key="i" class="material-item">
-                  <el-link :href="url" target="_blank" type="success">
-                    {{ urlTitles[i] || url }}
-                  </el-link>
-                </div>
-              </div>
+              <div v-if="materialHtml" class="material-content" v-html="materialHtml" />
               <p v-else class="empty-text">暂未填写材料地址</p>
             </div>
 
@@ -578,11 +584,6 @@ onMounted(() => {
   justify-content: center;
 }
 
-.task-meta {
-  margin: 4px 0 0;
-  font-size: 12px;
-  color: var(--text-secondary);
-}
 
 .content-zone {
   display: grid;
@@ -606,14 +607,33 @@ onMounted(() => {
   font-size: 22px;
 }
 
+.description-text {
+  margin: 0;
+  font-size: 14px;
+  line-height: 1.7;
+  color: var(--text-primary);
+  white-space: pre-wrap;
+  word-break: break-word;
+}
+
 .detail-block {
-  margin-top: 16px;
+  margin-top: 20px;
+  padding-top: 16px;
+  border-top: 1px solid var(--border-soft);
+}
+
+.detail-block:first-child {
+  margin-top: 0;
+  padding-top: 0;
+  border-top: none;
 }
 
 .label {
-  margin: 0 0 8px;
+  margin: 0 0 10px;
   color: var(--text-secondary);
-  font-size: 13px;
+  font-size: 14px;
+  font-weight: 500;
+  letter-spacing: 0.5px;
 }
 
 .empty-text {
@@ -621,19 +641,29 @@ onMounted(() => {
   color: var(--text-secondary);
 }
 
-.material-list {
-  display: flex;
-  flex-direction: column;
-  gap: 6px;
+.material-content {
+  font-size: 14px;
+  line-height: 1.8;
+  word-break: break-word;
+  color: var(--text-primary);
 }
 
-.material-item {
-  padding: 4px 0;
-  word-break: break-all;
+.material-content :deep(a) {
+  color: var(--green-600);
+  text-decoration: none;
+  border-bottom: 1px dashed var(--green-400);
+  transition: color 0.15s, border-color 0.15s;
 }
 
-.material-item .el-link {
-  font-size: 13px;
+.material-content :deep(a:hover) {
+  color: var(--green-800);
+  border-bottom-style: solid;
+}
+
+.material-content :deep(a)::after {
+  content: " ↗";
+  font-size: 11px;
+  opacity: 0.5;
 }
 
 .stats-grid {
@@ -649,12 +679,12 @@ onMounted(() => {
 }
 
 .stat-label {
-  font-size: 12px;
+  font-size: 13px;
   color: var(--text-secondary);
 }
 
 .stat-value {
-  font-size: 14px;
+  font-size: 15px;
   font-weight: 600;
   color: var(--text-primary);
 }