기록 시간 슬라이더 표시 정리

js/main.js

@@ -1492,6 +1492,17 @@ function formatDateTime(value) {
     });
 }
 
+function formatTimelineTime(value) {
+    const ts = toTimestamp(value);
+    if (!ts) return '-';
+    return new Date(ts).toLocaleString(langCode === 'ko' ? 'ko-KR' : 'en-US', {
+        month: '2-digit',
+        day: '2-digit',
+        hour: '2-digit',
+        minute: '2-digit',
+    });
+}
+
 function speedColor(kmh) {
     return speedBucket(kmh).color;
 }
@@ -2001,10 +2012,7 @@ function moveSelectedHistoryPoint(index, pan = false, syncSlider = true) {
 
     const value = document.getElementById('historyTimelineValue');
     if (value) {
-        const prev = points[Math.max(0, safeIndex - 1)];
-        const seconds = safeIndex > 0 ? Math.max(1, (toTimestamp(point.time) - toTimestamp(prev.time)) / 1000) : 0;
-        const kmh = safeIndex > 0 ? distanceMeters(prev, point) / seconds * 3.6 : 0;
-        value.textContent = `${formatDateTime(point.time)} · ${speedLabel(kmh)} ${formatSpeed(kmh)}`;
+        value.textContent = formatTimelineTime(point.time);
     }
     if (syncSlider) {
         const slider = document.getElementById('historyTimelineSlider');