设计验证真实痛点的调研问卷

只是写法示意，不是完整程序。

// ANS 调研问卷有效样本清洗与条件跳题判定器 (ans-survey-logic.ts)
export function validateAnsSurveySubmission(durationSec: number, answers: Record<string, string>) {
  const keys = Object.keys(answers);
  const isTooFast = durationSec < Math.max(8, keys.length * 1.8);
  return { valid: !isTooFast && keys.length > 0, reason: isTooFast ? "SPEED_RUN_SUSPECTED" : "OK" };
}