Music Shake 첫 박 시각 · 카운트다운 · 옛 일시 정지 판 정리

app/firebase/functions/src/quest/verify.ts

@@ -119,6 +119,13 @@ export const fnQuestVerifyMusicShake = onCall(async (req) => {
   if (typeof questSegments === 'number' && questSegments !== totalSegments) {
     fail(ERR.questAbnormal, '곡의 구간 수가 퀘스트 정의와 다릅니다.');
   }
+  // 첫 박 시각(영상 시각 기준 박 위치 `firstBeatMs + i·60/bpm`)도 같은 기준이어야 한다.
+  const questFirstBeat = quest.get('firstBeatMs');
+  const firstBeatMs = typeof questFirstBeat === 'number' ? questFirstBeat : 0;
+  const sentFirstBeat = req.data?.firstBeatMs;
+  if (sentFirstBeat !== undefined && sentFirstBeat !== firstBeatMs) {
+    fail(ERR.questAbnormal, '첫 박 시각이 퀘스트 정의와 다릅니다.');
+  }
   const limit = await dailyLimitOf(questId);
   const state = await progress(uid, questId, key);
   if (state.count >= limit) {
@@ -134,7 +141,7 @@ export const fnQuestVerifyMusicShake = onCall(async (req) => {
     type: 'musicShake',
     fandomId: optionalStr(req.data, 'fandomId') ?? '',
     value: judgement.perfect,
-    evidence: { musicShake: { trackId, totalSegments, judgements: judgement } },
+    evidence: { musicShake: { trackId, totalSegments, firstBeatMs, judgements: judgement } },
     questId,
     verified: grade !== 'F',
     rejectReason: grade === 'F' ? ERR.questIncomplete : null,