feat(S3): content export - Markdown download and PDF print

- Backend: GET /api/export/:type/:id returns .md file download
- Backend: POST /api/export/text for direct text-to-md export
- Frontend: downloadMarkdown() utility for client-side .md download
- Frontend: printAsPdf() utility via browser print dialog
- GenerateView: export dropdown button (MD / PDF) on result card

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/flask_prompt_master/__init__.py

@@ -76,6 +76,10 @@ def create_app(config_class=None):
     from src.flask_prompt_master.routes.conversation_routes import conversation_bp
     app.register_blueprint(conversation_bp)
 
+    # 内容导出（Markdown 下载）
+    from src.flask_prompt_master.routes.export_routes import export_bp
+    app.register_blueprint(export_bp)
+
     # 提示词结构化质量评价（多段文本 + 模型 JSON 评价 + 历史）
     from src.flask_prompt_master.models import prompt_quality_models  # noqa: F401
     from src.flask_prompt_master.routes.prompt_quality_routes import prompt_quality_bp

src/flask_prompt_master/routes/export_routes.py

@@ -0,0 +1,97 @@
+# -*- coding: utf-8 -*-
+"""
+内容导出路由：Markdown 文件下载
+"""
+from flask import Blueprint, request, jsonify, Response
+from src.flask_prompt_master.models.models import Prompt, MealPlan, WeeklyReport, TravelPlan, MeetingMinutes, ResumeOptimization
+from src.flask_prompt_master.models.history_models import PromptHistory
+from src.flask_prompt_master.user_context import get_current_user_id
+from datetime import datetime
+
+export_bp = Blueprint('export', __name__)
+
+CONTENT_MODELS = {
+    'prompt': Prompt,
+    'meal': MealPlan,
+    'report': WeeklyReport,
+    'travel': TravelPlan,
+    'meeting': MeetingMinutes,
+    'resume': ResumeOptimization,
+    'history': PromptHistory,
+}
+
+FIELD_MAP = {
+    'prompt': ('input_text', 'generated_text'),
+    'meal': ('meal_plan_content',),
+    'report': ('report_content',),
+    'travel': ('plan_content',),
+    'meeting': ('summary_content',),
+    'resume': ('optimized_content',),
+    'history': ('generated_prompt',),
+}
+
+TITLE_MAP = {
+    'prompt': '提示词生成结果',
+    'meal': '饭菜规划',
+    'report': '周报/日报',
+    'travel': '旅行攻略',
+    'meeting': '会议纪要',
+    'resume': '简历优化',
+    'history': '历史记录',
+}
+
+
+@export_bp.route('/api/export/<content_type>/<int:content_id>', methods=['GET'])
+def export_content(content_type, content_id):
+    """导出内容为 Markdown 文件下载"""
+    if content_type not in CONTENT_MODELS:
+        return jsonify({'success': False, 'message': f'不支持的内容类型: {content_type}'}), 400
+
+    model = CONTENT_MODELS[content_type]
+    record = model.query.get(content_id)
+    if not record:
+        return jsonify({'success': False, 'message': '内容不存在'}), 404
+
+    fields = FIELD_MAP.get(content_type, [])
+    title = TITLE_MAP.get(content_type, '导出内容')
+
+    # 组装 Markdown 内容
+    lines = [f'# {title}', '', f'> 导出时间: {datetime.now().strftime("%Y-%m-%d %H:%M:%S")}', '']
+    for field in fields:
+        val = getattr(record, field, None) or ''
+        lines.append(val)
+        lines.append('')
+
+    markdown = '\n'.join(lines)
+
+    filename = f'{content_type}_{content_id}_{datetime.now().strftime("%Y%m%d%H%M%S")}.md'
+    return Response(
+        markdown,
+        mimetype='text/markdown; charset=utf-8',
+        headers={
+            'Content-Disposition': f'attachment; filename="{filename}"',
+            'X-Content-Type-Options': 'nosniff',
+        },
+    )
+
+
+@export_bp.route('/api/export/text', methods=['POST'])
+def export_text():
+    """直接导出文本内容为 Markdown（无需存储记录）"""
+    data = request.get_json(silent=True) or {}
+    content = (data.get('content') or '').strip()
+    title = (data.get('title') or '导出内容').strip()
+
+    if not content:
+        return jsonify({'success': False, 'message': '内容为空'}), 400
+
+    markdown = f'# {title}\n\n> 导出时间: {datetime.now().strftime("%Y-%m-%d %H:%M:%S")}\n\n{content}\n'
+    filename = f'export_{datetime.now().strftime("%Y%m%d%H%M%S")}.md'
+    return Response(
+        markdown,
+        mimetype='text/markdown; charset=utf-8',
+        headers={
+            'Content-Disposition': f'attachment; filename="{filename}"',
+            'X-Content-Type-Options': 'nosniff',
+        },
+    )

vue-app/src/utils/export.ts

@@ -0,0 +1,38 @@
+/**
+ * 导出文本为 Markdown / PDF
+ */
+
+export function downloadMarkdown(content: string, title = '导出内容') {
+  const now = new Date().toISOString().slice(0, 19).replace(/[:T]/g, '-')
+  const markdown = `# ${title}\n\n> 导出时间: ${new Date().toLocaleString('zh-CN')}\n\n${content}\n`
+  const blob = new Blob([markdown], { type: 'text/markdown; charset=utf-8' })
+  const url = URL.createObjectURL(blob)
+  const a = document.createElement('a')
+  a.href = url
+  a.download = `${title.replace(/\s+/g, '_')}_${now}.md`
+  document.body.appendChild(a)
+  a.click()
+  document.body.removeChild(a)
+  URL.revokeObjectURL(url)
+}
+
+export function printAsPdf(content: string, title = '导出内容') {
+  const w = window.open('', '_blank', 'width=800,height=600')
+  if (!w) return
+  w.document.write(`
+    <!DOCTYPE html>
+    <html><head><meta charset="utf-8">
+    <title>${title}</title>
+    <style>
+      body { font-family: system-ui, sans-serif; max-width: 800px; margin: 0 auto; padding: 2rem; line-height: 1.7; }
+      pre { white-space: pre-wrap; background: #f5f5f5; padding: 1rem; border-radius: 6px; }
+    </style></head>
+    <body><h1>${title}</h1><p><em>导出时间: ${new Date().toLocaleString('zh-CN')}</em></p><pre>${escapeHtml(content)}</pre></body></html>
+  `)
+  w.document.close()
+  setTimeout(() => w.print(), 300)
+}
+
+function escapeHtml(text: string) {
+  return text.replace(/&/g, '&amp;').replace(/</g, '&lt;').replace(/>/g, '&gt;')
+}

vue-app/src/views/GenerateView.vue

@@ -4,6 +4,8 @@ import { useRouter } from 'vue-router'
 import { fetchGenerateMeta, fetchTemplatesByCategory, generatePrompt, continuePrompt } from '@/api/modules/prompt'
 import { quickAddFavorite } from '@/api/modules/favorite'
 import type { PromptTemplateItem } from '@/api/types/template'
+import { ArrowDownBold } from '@element-plus/icons-vue'
+import { downloadMarkdown, printAsPdf } from '@/utils/export'
 
 const metaLoading = ref(true)
 const templatesLoading = ref(false)
@@ -279,6 +281,19 @@ function resetConversation() {
   ElMessage.info('已开始新对话')
 }
 
+function exportMarkdown() {
+  if (!result.value) return
+  const tpl = selectedTemplate.value
+  downloadMarkdown(result.value.generated_text, tpl?.name || '提示词生成结果')
+  ElMessage.success('Markdown 已下载')
+}
+
+function exportPdf() {
+  if (!result.value) return
+  const tpl = selectedTemplate.value
+  printAsPdf(result.value.generated_text, tpl?.name || '提示词生成结果')
+}
+
 async function addToFavorites() {
   if (!result.value || selectedTemplateId.value == null) return
   const tpl = selectedTemplate.value
@@ -439,6 +454,17 @@ onMounted(async () => {
               加入收藏
             </el-button>
             <el-button type="success" plain size="small" @click="copyResult">复制</el-button>
+            <el-dropdown trigger="click" @command="(cmd: string) => cmd === 'md' ? exportMarkdown() : exportPdf()">
+              <el-button type="info" plain size="small">
+                导出 <el-icon class="el-icon--right"><ArrowDownBold /></el-icon>
+              </el-button>
+              <template #dropdown>
+                <el-dropdown-menu>
+                  <el-dropdown-item command="md">Markdown (.md)</el-dropdown-item>
+                  <el-dropdown-item command="pdf">PDF (打印)</el-dropdown-item>
+                </el-dropdown-menu>
+              </template>
+            </el-dropdown>
           </el-space>
         </div>
       </template>