refactor: startAt을 저장하고 계산하여 시간을 표시하도록 수정

src/app/session/page.tsx

@@ -28,6 +28,24 @@ const PRIMARY = "#2F6FED";
 const PRIMARY_HOVER = "#295FD1";
 const HOVER = "#F1F5FF";
 
+// localStorage keys (세션 시간/자리비움 복구용)
+const LS = {
+  active: "hushroom:session-active",
+  mode: "hushroom:session-mode",
+  id: "hushroom:session-id",
+  startedAt: "hushroom:session-startedAt",
+  awayTotalMs: "hushroom:session-awayTotalMs",
+  awayStartedAt: "hushroom:session-awayStartedAt",
+  isAway: "hushroom:session-isAway",
+
+  goal: "hushroom:session-goal",
+  nextAction: "hushroom:session-nextAction",
+
+  endElapsed: "hushroom:session-elapsed",
+  endAway: "hushroom:session-away",
+  endReason: "hushroom:session-end-reason",
+} as const;
+
 function clampMode(v: string | null): Mode {
   if (v === "sprint" || v === "deepwork" || v === "freeflow") return v;
   return "freeflow";
@@ -53,112 +71,15 @@ function formatHHMMSS(totalSeconds: number) {
   return `${hh}:${mm}:${ss}`;
 }
 
-function reasonLabel(r: RecenterReason) {
-  switch (r) {
-    case "distracted":
-      return "산만함";
-    case "stuck":
-      return "막힘";
-    case "tired":
-      return "피로";
-    case "overwhelmed":
-      return "부담";
-  }
+function safeNumber(v: string | null, fallback = 0) {
+  const n = Number(v ?? "");
+  return Number.isFinite(n) ? n : fallback;
 }
 
-/**
- * ✅ 리라이트 원칙(목적/이유 반영)
- * - 3초 안에 “뭘 하면 되는지” 떠오르는 행동 문구
- * - 목표 변경/재설정처럼 읽히는 표현 금지
- * - 작성/입력 강제 금지(원클릭 → 즉시 실행)
- * - 도구/도메인 중립
- * - “2분 동안만”이라는 임시성을 기본으로 내포
- */
-function recenterOptions(
-  goal: string,
-  reason: RecenterReason,
-): RecenterOption[] {
-  const g = goal.trim();
-  const goalHint = g ? `“${g}”로 복귀` : "목표로 복귀";
-
-  if (reason === "distracted") {
-    return [
-      {
-        id: "dist_1",
-        label: "2분 미션: 방해 요소 1개만 끄기(알림/탭/폰)",
-        pinText: "방해 요소 1개 끄기",
-      },
-      {
-        id: "dist_2",
-        label: "2분 미션: 화면을 ‘하나’만 남기기(지금 필요한 것만)",
-        pinText: "화면 하나만 남기기",
-      },
-      {
-        id: "dist_3",
-        label: `2분 미션: ${goalHint} — 가장 쉬운 첫 행동 1개`,
-        pinText: g ? `“${g}” 첫 행동 1개` : "첫 행동 1개",
-      },
-    ];
-  }
-
-  if (reason === "stuck") {
-    return [
-      {
-        id: "stuck_1",
-        label: "2분 미션: 막히는 건 잠깐 두고, 확실한 것 1개만 진행",
-        pinText: "확실한 것 1개 진행",
-      },
-      {
-        id: "stuck_2",
-        label: "2분 미션: 가장 작은 결과물 1개만 만들기(한 줄/한 칸/한 개)",
-        pinText: "가장 작은 결과물 1개",
-      },
-      {
-        id: "stuck_3",
-        label: "2분 미션: 60초 정리(다음 한 조각) + 60초 착수(그 조각)",
-        pinText: "정리 60초 + 착수 60초",
-      },
-    ];
-  }
-
-  if (reason === "tired") {
-    return [
-      {
-        id: "tired_1",
-        label: "2분 미션: 물 한 모금/자세 정리 후 1분만 손 움직이기",
-        pinText: "물/자세 정리 후 1분",
-      },
-      {
-        id: "tired_2",
-        label: "2분 미션: 30초 숨 고르기 + 90초 아주 쉬운 행동",
-        pinText: "30초 숨 + 90초 쉬운 행동",
-      },
-      {
-        id: "tired_3",
-        label: `2분 미션: ${goalHint} — 가장 가벼운 한 조각만`,
-        pinText: "가장 가벼운 한 조각",
-      },
-    ];
-  }
-
-  // overwhelmed
-  return [
-    {
-      id: "ovr_1",
-      label: "2분 미션: (2분만) 범위를 최소로 줄여 ‘첫 행동 1개’만",
-      pinText: "첫 행동 1개만",
-    },
-    {
-      id: "ovr_2",
-      label: "2분 미션: 완성 말고 ‘전진’만(아주 작은 1개)",
-      pinText: "아주 작은 1개 전진",
-    },
-    {
-      id: "ovr_3",
-      label: `2분 미션: ${goalHint} — 지금 당장 가능한 것 1개`,
-      pinText: "지금 가능한 것 1개",
-    },
-  ];
+function newId() {
+  return (crypto?.randomUUID?.() ?? `${Date.now()}-${Math.random()}`)
+    .replace(/[^a-zA-Z0-9]/g, "")
+    .slice(0, 24);
 }
 
 function useLocalPresence(roomKey: string, status: PresenceStatus) {
@@ -268,7 +189,6 @@ function useLocalPresence(roomKey: string, status: PresenceStatus) {
           }
         } catch {}
       };
-      // window.addEventListener("storage", onStorage);
       return () => window.removeEventListener("storage", onStorage);
     }
 
@@ -276,7 +196,6 @@ function useLocalPresence(roomKey: string, status: PresenceStatus) {
       channelRef.current?.close();
       channelRef.current = null;
     };
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [roomKey]);
 
   useEffect(() => {
@@ -284,7 +203,6 @@ function useLocalPresence(roomKey: string, status: PresenceStatus) {
     participantsRef.current.set(selfId, { id: selfId, status, lastSeen: now });
     publish({ type: "ping", roomKey, from: selfId, status, ts: now });
     syncStateToReact();
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [status, roomKey, selfId]);
 
   useEffect(() => {
@@ -326,7 +244,6 @@ function useLocalPresence(roomKey: string, status: PresenceStatus) {
       window.removeEventListener("beforeunload", onBeforeUnload);
       publish({ type: "leave", roomKey, from: selfId, ts: Date.now() });
     };
-    // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [roomKey, selfId, status]);
 
   return { participants, selfId };
@@ -353,31 +270,24 @@ function SessionInner() {
   const [goal, setGoal] = useState("");
   const [nextAction, setNextAction] = useState("");
 
+  // ✅ startedAt/now 기반 시간
+  const [startedAt, setStartedAt] = useState<number>(() => Date.now());
+  const [now, setNow] = useState<number>(() => Date.now());
+  const endedRef = useRef(false);
+
+  // ✅ away: 누적 ms + (현재 away면 now-startedAt)
   const [isAway, setIsAway] = useState(false);
-  const [awaySeconds, setAwaySeconds] = useState(0);
+  const awayTotalMsRef = useRef(0);
+  const awayStartedAtRef = useRef<number | null>(null);
 
   // presence (로컬)
   const presenceStatus: PresenceStatus = isAway ? "away" : "focus";
   const roomKey = "lounge";
   const { participants } = useLocalPresence(roomKey, presenceStatus);
 
-  // time
-  const [elapsed, setElapsed] = useState(0);
-  const [remaining, setRemaining] = useState(duration ?? 0);
-
-  // refs (interval에서 최신값 쓰기)
-  const elapsedRef = useRef(0);
-  const awayRef = useRef(0);
-  const isAwayRef = useRef(false);
-
-  useEffect(() => {
-    isAwayRef.current = isAway;
-  }, [isAway]);
-
   // toast
   const [toast, setToast] = useState<string | null>(null);
   const toastTimerRef = useRef<number | null>(null);
-
   const showToast = (msg: string) => {
     setToast(msg);
     if (toastTimerRef.current) window.clearTimeout(toastTimerRef.current);
@@ -419,72 +329,129 @@ function SessionInner() {
     setCheckinOpen(false);
   };
 
-  // 세션 초기화(모드/길이 바뀔 때)
+  // 세션 시작/복구 (mode가 바뀌면 새 세션)
   useEffect(() => {
-    setElapsed(0);
-    elapsedRef.current = 0;
+    endedRef.current = false;
 
-    setAwaySeconds(0);
-    awayRef.current = 0;
+    const active = localStorage.getItem(LS.active) === "1";
+    const storedMode = localStorage.getItem(LS.mode);
+    const storedStartedAt = safeNumber(localStorage.getItem(LS.startedAt), 0);
 
-    if (duration) setRemaining(duration);
-    lastCheckpointRef.current = 0;
+    const shouldResume = active && storedMode === mode && storedStartedAt > 0;
 
+    if (shouldResume) {
+      setStartedAt(storedStartedAt);
+      setNow(Date.now());
+
+      const isAwayStored = localStorage.getItem(LS.isAway) === "1";
+      const awayTotal = safeNumber(localStorage.getItem(LS.awayTotalMs), 0);
+      const awayStartedAt = safeNumber(
+        localStorage.getItem(LS.awayStartedAt),
+        0,
+      );
+
+      awayTotalMsRef.current = Math.max(0, awayTotal);
+      awayStartedAtRef.current =
+        isAwayStored && awayStartedAt > 0 ? awayStartedAt : null;
+      setIsAway(isAwayStored);
+    } else {
+      const t = Date.now();
+      localStorage.setItem(LS.active, "1");
+      localStorage.setItem(LS.mode, mode);
+      localStorage.setItem(LS.id, newId());
+      localStorage.setItem(LS.startedAt, String(t));
+      localStorage.setItem(LS.awayTotalMs, "0");
+      localStorage.removeItem(LS.awayStartedAt);
+      localStorage.setItem(LS.isAway, "0");
+
+      setStartedAt(t);
+      setNow(t);
+
+      awayTotalMsRef.current = 0;
+      awayStartedAtRef.current = null;
       setIsAway(false);
-    isAwayRef.current = false;
+    }
 
+    // UI 관련 리셋(기존 로직 유지)
     setToast(null);
     if (toastTimerRef.current) window.clearTimeout(toastTimerRef.current);
-
+    lastCheckpointRef.current = 0;
     shownCheckinsRef.current = new Set();
     resetRecenter();
-    // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [duration]);
+    setCheckinOpen(false);
+  }, [mode, duration]);
 
   // 목표/다음 단계(고정) 로드
   useEffect(() => {
-    setGoal(localStorage.getItem("hushroom:session-goal") ?? "");
-    setNextAction(localStorage.getItem("hushroom:session-nextAction") ?? "");
+    setGoal(localStorage.getItem(LS.goal) ?? "");
+    setNextAction(localStorage.getItem(LS.nextAction) ?? "");
   }, []);
 
-  // 메인 타이머
+  // now 갱신(탭 전환/잠자기 복귀 시에도 보정)
   useEffect(() => {
-    const id = window.setInterval(() => {
-      setElapsed((prev) => {
-        const next = prev + 1;
-        elapsedRef.current = next;
-        return next;
-      });
+    const tick = () => setNow(Date.now());
 
-      if (isAwayRef.current) {
-        setAwaySeconds((prev) => {
-          const next = prev + 1;
-          awayRef.current = next;
-          return next;
-        });
-      }
+    tick();
+    const id = window.setInterval(tick, 250);
 
-      if (duration) {
-        setRemaining((prev) => {
-          const next = Math.max(0, prev - 1);
-          if (next === 0 && prev !== 0) {
-            localStorage.setItem("hushroom:session-elapsed", String(duration));
-            localStorage.setItem(
-              "hushroom:session-away",
-              String(awayRef.current),
-            );
-            localStorage.setItem("hushroom:session-end-reason", "timed_out");
+    const onVis = () => tick();
+    const onFocus = () => tick();
+    const onPageShow = () => tick();
+
+    document.addEventListener("visibilitychange", onVis);
+    window.addEventListener("focus", onFocus);
+    window.addEventListener("pageshow", onPageShow);
+
+    return () => {
+      window.clearInterval(id);
+      document.removeEventListener("visibilitychange", onVis);
+      window.removeEventListener("focus", onFocus);
+      window.removeEventListener("pageshow", onPageShow);
+    };
+  }, []);
+
+  const elapsed = useMemo(() => {
+    const d = now - startedAt;
+    return Math.max(0, Math.floor(d / 1000));
+  }, [now, startedAt]);
+
+  const remaining = useMemo(() => {
+    if (!duration) return 0;
+    return Math.max(0, duration - elapsed);
+  }, [duration, elapsed]);
+
+  const awayMs = useMemo(() => {
+    const base = awayTotalMsRef.current;
+    const extra = awayStartedAtRef.current ? now - awayStartedAtRef.current : 0;
+    return Math.max(0, base + extra);
+  }, [now, isAway]); // isAway 변화 시 즉시 반영
+
+  const awaySeconds = useMemo(() => Math.floor(awayMs / 1000), [awayMs]);
+
+  const focusSeconds = Math.max(0, elapsed - awaySeconds);
+
+  const timeMain = useMemo(() => {
+    if (mode === "freeflow") return formatHHMMSS(elapsed);
+    return formatHHMMSS(remaining);
+  }, [elapsed, remaining, mode]);
+
+  // ✅ 타임아웃 종료(점프 포함)
+  useEffect(() => {
+    if (!duration) return;
+    if (endedRef.current) return;
+    if (elapsed < duration) return;
+
+    endedRef.current = true;
+
+    localStorage.setItem(LS.endElapsed, String(duration));
+    localStorage.setItem(LS.endAway, String(awaySeconds));
+    localStorage.setItem(LS.endReason, "timed_out");
+
+    localStorage.setItem(LS.active, "0");
     router.push(`/session/end?mode=${mode}`);
-          }
-          return next;
-        });
-      }
-    }, 1000);
+  }, [elapsed, duration, mode, router, awaySeconds]);
 
-    return () => window.clearInterval(id);
-  }, [duration, mode, router]);
-
-  // freeflow 60분 토스트
+  // freeflow 60분 토스트(점프 시에도 “현재 배수” 기준으로 1회만)
   useEffect(() => {
     if (mode !== "freeflow") return;
     const mins = Math.floor(elapsed / 60);
@@ -511,76 +478,40 @@ function SessionInner() {
     }
   }, [elapsed, mode, isAway, checkinOpen, mission, checkinTimes]);
 
-  // 2분 미션 카운트다운
-  useEffect(() => {
-    if (!mission) return;
+  // ✅ 자리비움 토글(누적 ms 기반)
+  const toggleAway = () => {
+    const t = Date.now();
+    const next = !isAway;
 
-    const tick = () => {
-      const left = Math.max(0, Math.ceil((mission.endsAt - Date.now()) / 1000));
-      setMissionLeft(left);
-      if (left === 0) setCheckinStep("done");
-    };
+    if (next) {
+      // away 시작
+      awayStartedAtRef.current = t;
+      localStorage.setItem(LS.awayStartedAt, String(t));
+      localStorage.setItem(LS.isAway, "1");
+      setIsAway(true);
+      return;
+    }
 
-    tick();
-    const id = window.setInterval(tick, 250);
-    return () => window.clearInterval(id);
-  }, [mission]);
-
-  const timeMain = useMemo(() => {
-    if (mode === "freeflow") return formatHHMMSS(elapsed);
-    return formatHHMMSS(remaining);
-  }, [elapsed, remaining, mode]);
-
-  const focusSeconds = Math.max(0, elapsed - awaySeconds);
-
-  const openRecenter = () => {
-    setRecenterReason(null);
-    setMission(null);
-    setMissionLeft(0);
-    setCheckinStep("reason");
-    setCheckinOpen(true);
-  };
-
-  const startMission = (opt: RecenterOption) => {
-    const endsAt = Date.now() + 2 * 60 * 1000;
-    setMission({ option: opt, endsAt });
-    setMissionLeft(120);
-    setCheckinStep("running");
-    setCheckinOpen(true);
-    showToast("좋아요. 딱 2분만.");
-  };
-
-  const endMissionEarly = () => {
-    if (!mission) return;
-    setMission({ ...mission, endsAt: Date.now() });
-    setMissionLeft(0);
-    setCheckinStep("done");
-  };
-
-  const pinMissionAsNext = () => {
-    if (!mission) return;
-    const text = mission.option.pinText.trim();
-    if (!text) return;
-
-    setNextAction(text);
-    localStorage.setItem("hushroom:session-nextAction", text);
-    showToast("다음 단계로 고정했어요.");
-    resetRecenter();
-  };
-
-  const unpinNext = () => {
-    setNextAction("");
-    localStorage.removeItem("hushroom:session-nextAction");
-    showToast("고정을 해제했어요.");
+    // away 종료
+    if (awayStartedAtRef.current) {
+      awayTotalMsRef.current += t - awayStartedAtRef.current;
+      localStorage.setItem(LS.awayTotalMs, String(awayTotalMsRef.current));
+    }
+    awayStartedAtRef.current = null;
+    localStorage.removeItem(LS.awayStartedAt);
+    localStorage.setItem(LS.isAway, "0");
+    setIsAway(false);
   };
 
   const onEnd = () => {
-    localStorage.setItem(
-      "hushroom:session-elapsed",
-      String(elapsedRef.current),
-    );
-    localStorage.setItem("hushroom:session-away", String(awayRef.current));
-    localStorage.setItem("hushroom:session-end-reason", "manual");
+    if (endedRef.current) return;
+    endedRef.current = true;
+
+    localStorage.setItem(LS.endElapsed, String(elapsed));
+    localStorage.setItem(LS.endAway, String(awaySeconds));
+    localStorage.setItem(LS.endReason, "manual");
+
+    localStorage.setItem(LS.active, "0");
     router.push(`/session/end?mode=${mode}`);
   };
 
@@ -642,32 +573,6 @@ function SessionInner() {
                 </div>
               </div>
             )}
-
-            {/* Next action (고정) */}
-            {nextAction && (
-              <div
-                className="mt-3 rounded-2xl border bg-white px-4 py-3"
-                style={{ borderColor: BORDER }}
-              >
-                <div className="flex items-center justify-between gap-3">
-                  <div className="text-xs font-semibold text-slate-600">
-                    다음 단계(고정)
-                  </div>
-                  <button
-                    type="button"
-                    className="rounded-lg border px-2 py-1 text-xs font-semibold text-slate-700 transition hover:bg-[#F1F5FF] active:scale-[0.99]"
-                    style={{ borderColor: BORDER }}
-                    onClick={unpinNext}
-                  >
-                    해제
-                  </button>
-                </div>
-
-                <div className="mt-1 text-xl font-semibold text-blue-700 line-clamp-2 break-words">
-                  {nextAction}
-                </div>
-              </div>
-            )}
           </div>
 
           <div className="text-[44px] font-semibold leading-none text-slate-900 tabular-nums">
@@ -675,202 +580,11 @@ function SessionInner() {
           </div>
         </div>
 
-        {/* Check-in / Recenter banner (임시 미션) */}
-        {checkinOpen && (
-          <div
-            className="mt-4 rounded-2xl border bg-white px-4 py-3 text-sm text-slate-800 shadow-sm"
-            style={{ borderColor: BORDER }}
-          >
-            {/* ASK */}
-            {checkinStep === "ask" && (
-              <div className="flex items-center justify-between gap-3">
-                <div className="font-semibold">지금 목표에 붙어있나요?</div>
-                <div className="flex gap-2">
-                  <button
-                    type="button"
-                    className="rounded-xl border px-3 py-2 font-semibold transition active:scale-[0.99]"
-                    style={{ borderColor: BORDER }}
-                    onClick={() => {
-                      setCheckinOpen(false);
-                      setCheckinStep("ask");
-                      showToast("좋아요. 이어가요.");
-                    }}
-                  >
-                    붙어있음
-                  </button>
-                </div>
-              </div>
-            )}
-
-            {/* REASON */}
-            {checkinStep === "reason" && (
-              <div>
-                <div className="font-semibold">어느 쪽에 가까워요?</div>
-                <div className="mt-2 grid grid-cols-2 gap-2">
-                  {(
-                    [
-                      "distracted",
-                      "stuck",
-                      "tired",
-                      "overwhelmed",
-                    ] as RecenterReason[]
-                  ).map((r) => (
-                    <button
-                      key={r}
-                      type="button"
-                      className="rounded-2xl border bg-white px-3 py-2 text-left font-semibold transition hover:bg-[#F1F5FF] active:scale-[0.99]"
-                      style={{ borderColor: BORDER }}
-                      onClick={() => {
-                        setRecenterReason(r);
-                        setCheckinStep("pick");
-                      }}
-                    >
-                      {reasonLabel(r)}
-                    </button>
-                  ))}
-                </div>
-
-                <div className="mt-2 flex justify-end">
-                  <button
-                    type="button"
-                    className="rounded-xl border px-3 py-2 font-semibold transition active:scale-[0.99]"
-                    style={{ borderColor: BORDER }}
-                    onClick={() => resetRecenter()}
-                  >
-                    닫기
-                  </button>
-                </div>
-              </div>
-            )}
-
-            {/* PICK */}
-            {checkinStep === "pick" && recenterReason && (
-              <div>
-                <div className="flex items-center justify-between gap-3">
-                  <div className="font-semibold">
-                    그럼 2분만 ({reasonLabel(recenterReason)})
-                  </div>
-                  <button
-                    type="button"
-                    className="rounded-xl border px-3 py-2 font-semibold transition active:scale-[0.99]"
-                    style={{ borderColor: BORDER }}
-                    onClick={() => setCheckinStep("reason")}
-                  >
-                    뒤로
-                  </button>
-                </div>
-
-                <div className="mt-2 grid gap-2">
-                  {recenterOptions(goal, recenterReason).map((opt) => (
-                    <button
-                      key={opt.id}
-                      type="button"
-                      className="rounded-2xl border px-3 py-2 text-left font-semibold transition hover:bg-[#F1F5FF] active:scale-[0.99]"
-                      style={{ borderColor: BORDER }}
-                      onClick={() => startMission(opt)}
-                    >
-                      {opt.label}
-                    </button>
-                  ))}
-                </div>
-
-                <div className="mt-2 text-xs text-slate-500">
-                  선택해도 “고정”되지 않습니다. 2분 미션만 실행해요.
-                </div>
-              </div>
-            )}
-
-            {/* RUNNING */}
-            {checkinStep === "running" && mission && (
-              <div>
-                <div className="flex items-start justify-between gap-3">
-                  <div>
-                    <div className="font-semibold">
-                      복구 중 · {missionLeft}s
-                    </div>
-                    <div className="mt-1 text-slate-700">
-                      {mission.option.label}
-                    </div>
-                  </div>
-
-                  <button
-                    type="button"
-                    className="rounded-xl border px-3 py-2 font-semibold transition active:scale-[0.99]"
-                    style={{ borderColor: BORDER }}
-                    onClick={endMissionEarly}
-                  >
-                    완료
-                  </button>
-                </div>
-
-                <div className="mt-2 text-xs text-slate-500">
-                  2분만 행동에 붙이면 다시 돌아옵니다.
-                </div>
-              </div>
-            )}
-
-            {/* DONE */}
-            {checkinStep === "done" && mission && (
-              <div>
-                <div className="font-semibold">
-                  좋아요. 다시 목표로 돌아가요.
-                </div>
-
-                <div className="mt-3 flex flex-wrap gap-2">
-                  <button
-                    type="button"
-                    className="rounded-xl border px-3 py-2 font-semibold transition active:scale-[0.99]"
-                    style={{ borderColor: BORDER }}
-                    onClick={() => {
-                      resetRecenter(); // 기본: 임시 미션은 사라짐
-                      showToast("좋아요. 목표로 돌아가요.");
-                    }}
-                  >
-                    계속
-                  </button>
-
-                  <button
-                    type="button"
-                    className="rounded-xl border px-3 py-2 font-semibold transition active:scale-[0.99]"
-                    style={{ borderColor: BORDER }}
-                    onClick={() => {
-                      setMission(null);
-                      setMissionLeft(0);
-                      setCheckinStep(recenterReason ? "pick" : "reason");
-                    }}
-                  >
-                    다시 2분
-                  </button>
-
-                  <button
-                    type="button"
-                    className="rounded-xl px-3 py-2 font-semibold text-white transition active:scale-[0.99]"
-                    style={{ backgroundColor: PRIMARY }}
-                    onMouseEnter={(e) =>
-                      (e.currentTarget.style.backgroundColor = PRIMARY_HOVER)
-                    }
-                    onMouseLeave={(e) =>
-                      (e.currentTarget.style.backgroundColor = PRIMARY)
-                    }
-                    onClick={pinMissionAsNext}
-                  >
-                    다음 단계로 고정
-                  </button>
-                </div>
-
-                <div className="mt-2 text-xs text-slate-500">
-                  고정은 선택 사항이에요. 기본은 사라집니다.
-                </div>
-              </div>
-            )}
-          </div>
-        )}
-
         {/* Actions */}
         <div className="mt-5 grid grid-cols-2 gap-3">
           <button
             type="button"
-            onClick={() => setIsAway((v) => !v)}
+            onClick={toggleAway}
             className="rounded-3xl border bg-white px-4 py-4 text-base font-semibold text-slate-800 shadow-sm transition active:scale-[0.99]"
             style={{ borderColor: BORDER }}
             onMouseEnter={(e) =>