feat: add taro student learning flow

apps/taro/src/pages/student/assets/index.config.ts

@@ -0,0 +1,3 @@
+export default definePageConfig({
+  navigationBarTitleText: '资料',
+});

apps/taro/src/pages/student/assets/index.tsx

@@ -0,0 +1,70 @@
+import { useEffect, useState } from 'react';
+import Taro from '@tarojs/taro';
+import { Button, Text, View } from '@tarojs/components';
+import { loadContentAssets, signAssetDownload, signAssetPreview, type ContentAsset } from '@/services/catalog';
+import '../student.css';
+
+function openUrl(url?: string) {
+  if (!url) return;
+  if (process.env.TARO_ENV === 'h5' && typeof window !== 'undefined') {
+    window.open(url, '_blank', 'noopener,noreferrer');
+    return;
+  }
+  Taro.setClipboardData({ data: url });
+}
+
+export default function StudentAssetsPage() {
+  const [assets, setAssets] = useState<ContentAsset[]>([]);
+  const [error, setError] = useState('');
+
+  useEffect(() => {
+    loadContentAssets({ includeLocked: true })
+      .then(payload => setAssets(payload.items || []))
+      .catch(nextError => setError(nextError instanceof Error ? nextError.message : '资料加载失败'));
+  }, []);
+
+  async function preview(asset: ContentAsset) {
+    try {
+      const payload = await signAssetPreview(asset.id);
+      openUrl(payload.preview?.url);
+    } catch (nextError) {
+      setError(nextError instanceof Error ? nextError.message : '预览失败');
+    }
+  }
+
+  async function download(asset: ContentAsset) {
+    try {
+      const payload = await signAssetDownload(asset.id);
+      openUrl(payload.download?.url);
+    } catch (nextError) {
+      setError(nextError instanceof Error ? nextError.message : '下载失败');
+    }
+  }
+
+  return (
+    <View className='student-page'>
+      <View className='student-topbar'>
+        <View className='student-title-block'>
+          <Text className='student-kicker'>Assets</Text>
+          <Text className='student-title'>资料下载</Text>
+          <Text className='student-subtitle'>私有文件必须向后端申请短期签名，前端不直接拼对象存储地址。</Text>
+        </View>
+      </View>
+      <View className='list-stack'>
+        {assets.map(item => (
+          <View className='list-row' key={item.id}>
+            <Text className='row-main'>{item.title || item.fileName || '未命名资料'}</Text>
+            <Text className='row-meta'>{item.assetType || 'asset'} · {item.visibility || 'public'}</Text>
+            {item.description ? <Text className='row-meta'>{item.description}</Text> : null}
+            <View className='toolbar'>
+              <Button className='secondary-button' onClick={() => preview(item)}>预览</Button>
+              <Button className='primary-button' onClick={() => download(item)}>下载</Button>
+            </View>
+          </View>
+        ))}
+      </View>
+      {!assets.length ? <View className='empty-state'>暂无可见资料。</View> : null}
+      {error ? <Text className='error-text'>{error}</Text> : null}
+    </View>
+  );
+}