clear lot of tickets

src/screens/Library/MusicDetails.js

@@ -221,6 +221,38 @@ const MusicDetails = ({ route }) => {
     }
   }, [project?.musicTimestamps, project?.songIndex]);
 
+  const estimatedDurationMs = useMemo(() => {
+    const toMs = (value) => {
+      const num = Number(value);
+      if (!Number.isFinite(num) || num <= 0) return 0;
+      return num > 1000 ? Math.round(num) : Math.round(num * 1000);
+    };
+    const idx = Number(project?.songIndex);
+    const normalizedIdx = Number.isFinite(idx) && idx >= 0 ? idx : 0;
+    const tsEntry = project?.musicTimestamps?.[normalizedIdx];
+    if (tsEntry && typeof tsEntry === "object") {
+      const fromMetadata =
+        toMs(tsEntry.durationMs) ||
+        toMs(tsEntry.duration) ||
+        toMs(tsEntry.durationS) ||
+        toMs(tsEntry.durationSeconds) ||
+        toMs(tsEntry.audioDuration) ||
+        toMs(tsEntry.audioLength);
+      if (fromMetadata > 0) return fromMetadata;
+    }
+    let maxEndS = 0;
+    for (let i = 0; i < alignedWords.length; i++) {
+      const word = alignedWords[i];
+      const end = Number(word?.endS ?? word?.startS ?? 0);
+      if (Number.isFinite(end) && end > maxEndS) {
+        maxEndS = end;
+      }
+    }
+    return maxEndS > 0 ? Math.round(maxEndS * 1000) : 0;
+  }, [alignedWords, project?.musicTimestamps, project?.songIndex]);
+
+  const sliderDurationMs = durationMs > 0 ? durationMs : estimatedDurationMs;
+
   // Reset counters when the track changes
   useEffect(() => {
     listenedMsRef.current = 0;
@@ -320,7 +352,7 @@ const MusicDetails = ({ route }) => {
 
   const handleSliderSeek = useCallback(
     async (ratio) => {
-      const dur = durationMs || 0;
+      const dur = sliderDurationMs || 0;
       if (!trackDescriptor || dur <= 0) return;
       const targetMs = Math.max(0, Math.floor(dur * ratio));
       try {
@@ -333,7 +365,7 @@ const MusicDetails = ({ route }) => {
         console.log("MusicDetails seek error", e?.message);
       }
     },
-    [durationMs, trackDescriptor, isCurrentTrack, ensureLoaded, seekTrackTo]
+    [sliderDurationMs, trackDescriptor, isCurrentTrack, ensureLoaded, seekTrackTo]
   );
 
   const handleToggleLoop = useCallback(async () => {
@@ -839,10 +871,10 @@ const MusicDetails = ({ route }) => {
           <View style={{ paddingTop: 22 }}>
             <Slider
               value={fmt(positionMs)}
-              maxValue={fmt(durationMs)}
+              maxValue={fmt(sliderDurationMs)}
               progress={
-                durationMs
-                  ? Math.min(1, Math.max(0, (positionMs || 0) / durationMs))
+                sliderDurationMs
+                  ? Math.min(1, Math.max(0, (positionMs || 0) / sliderDurationMs))
                   : 0
               }
               seekEnabled={!!songUrl}