{"message":"🔍 搜题小帮手后端API服务","version":"1.0.0","status":"running","timestamp":"2026-04-11T02:22:52.543Z","endpoints":{"search":"POST /api/questions/search","stats":"GET /api/questions/stats","ocr":"POST /api/ocr/recognize","login":"POST /api/user/login","userInfo":"GET /api/user/info/:openid","userStats":"GET /api/user/stats","inviteReward":"POST /api/user/invite-reward","recordInvite":"POST /api/user/record-invite","searchCount":"GET /api/user/search-count/:openid","addSearchCount":"POST /api/user/add-search-count","recordSearch":"POST /api/user/record-search"}}