feat: add ai recommendation exports

apps/taro/src/pages/student/ai-school/index.tsx

@@ -1,6 +1,8 @@
 import { useEffect, useState } from 'react';
+import Taro from '@tarojs/taro';
 import { Button, Input, Picker, Text, Textarea, View } from '@tarojs/components';
 import {
+  exportSchoolRecommendationReport,
   generateSchoolRecommendation,
   loadSchoolRecommendationReports,
   type SchoolRecommendationReport,
@@ -22,6 +24,24 @@ function recommendationRows(report: SchoolRecommendationReport | null) {
   return report?.resultPayload?.recommendedSchools || [];
 }
 
+function saveExportFile(fileName: string, content: string, mimeType: string) {
+  if (process.env.TARO_ENV === 'h5' && typeof window !== 'undefined' && typeof document !== 'undefined') {
+    const blob = new Blob([content], { type: mimeType });
+    const url = window.URL.createObjectURL(blob);
+    const link = document.createElement('a');
+    link.href = url;
+    link.download = fileName;
+    link.rel = 'noopener noreferrer';
+    document.body.appendChild(link);
+    link.click();
+    link.remove();
+    window.URL.revokeObjectURL(url);
+    return;
+  }
+  Taro.setClipboardData({ data: content });
+  Taro.showToast({ title: '报告内容已复制', icon: 'none' });
+}
+
 export default function StudentAiSchoolPage() {
   const [profile, setProfile] = useState<StudentProfile | null>(null);
   const [reports, setReports] = useState<SchoolRecommendationReport[]>([]);
@@ -30,6 +50,7 @@ export default function StudentAiSchoolPage() {
   const [constraints, setConstraints] = useState('');
   const [riskIndex, setRiskIndex] = useState(0);
   const [loading, setLoading] = useState(false);
+  const [exporting, setExporting] = useState('');
   const [error, setError] = useState('');
 
   useEffect(() => {
@@ -65,6 +86,22 @@ export default function StudentAiSchoolPage() {
     }
   }
 
+  async function handleExport(format: 'markdown' | 'html') {
+    if (!current?.id) return;
+    setExporting(format);
+    setError('');
+    try {
+      const payload = await exportSchoolRecommendationReport(current.id, format);
+      if (!payload.item?.contentText) throw new Error('后端未返回报告内容');
+      saveExportFile(payload.item.fileName, payload.item.contentText, payload.item.mimeType);
+      if (process.env.TARO_ENV === 'h5') Taro.showToast({ title: '报告已导出', icon: 'success' });
+    } catch (nextError) {
+      setError(nextError instanceof Error ? nextError.message : '导出失败');
+    } finally {
+      setExporting('');
+    }
+  }
+
   const rows = recommendationRows(current);
 
   return (
@@ -123,6 +160,10 @@ export default function StudentAiSchoolPage() {
             <Text className='hero-title'>{riskLabel(current.resultPayload.riskLevel)}方案</Text>
             <Text className='hero-copy'>{current.resultPayload.summary}</Text>
           </View>
+          <View className='toolbar wrap compact-toolbar'>
+            <Button className='secondary-button' loading={exporting === 'markdown'} onClick={() => handleExport('markdown')}>导出MD</Button>
+            <Button className='secondary-button' loading={exporting === 'html'} onClick={() => handleExport('html')}>导出HTML</Button>
+          </View>
           <View className='list-stack'>
             {rows.map(item => (
               <View className='list-row' key={`${item.schoolId || item.schoolName}:${item.majorId || item.majorName || ''}`}>

apps/taro/src/services/ai.ts

@@ -63,6 +63,17 @@ export interface SchoolRecommendationReport {
   updatedAt: string;
 }
 
+export interface SchoolRecommendationExport {
+  reportId: string;
+  format: 'markdown' | 'html';
+  fileName: string;
+  mimeType: string;
+  contentBase64: string;
+  contentText?: string;
+  sha256: string;
+  sizeBytes: number;
+}
+
 export async function generateSchoolRecommendation(input: GenerateSchoolRecommendationInput) {
   return apiRequest<{ item?: SchoolRecommendationReport }>('/api/ai/school-recommendations/generate', {
     method: 'POST',
@@ -81,3 +92,9 @@ export async function loadSchoolRecommendationReport(reportId: string) {
     query: { reportId },
   });
 }
+
+export async function exportSchoolRecommendationReport(reportId: string, format: 'markdown' | 'html' = 'markdown') {
+  return apiRequest<{ item?: SchoolRecommendationExport }>('/api/ai/school-recommendations/export', {
+    query: { reportId, format },
+  });
+}