{"message":"WeChat Mini Program Backend API","version":"1.0.0","endpoints":{"health":"/api/health","wechatAuth":"/api/wechat/auth","generateQuestions":"/api/generate-questions","generateApplication":"/api/generate-application","chat":"/api/chat","qaHistory":"/api/qa-history","sessions":"/api/sessions","sessionMessages":"/api/sessions/:sessionId/messages"}}