{"message":"Food Monster Backend API","version":"1.0.0","endpoints":{"upload":"POST /api/upload - 上传图片并自动识别食物","get_image":"GET /api/image/{filename} - 获取图片","list_images":"GET /api/images - 获取所有图片列表","get_metadata":"GET /api/image/{filename}/metadata - 获取图片元数据（包括食物识别信息）","daily_nutrition":"GET /api/nutrition/daily/{date} - 获取指定日期的总营养（日期格式: YYYY-MM-DD）","nutrition_summary":"GET /api/nutrition/summary - 获取最近7天的营养汇总"}}