add 0.5 seconds

src/screens/Library/MusicDetails.js

@@ -217,6 +217,8 @@ const MusicDetails = () => {
     () => Math.max(0, (progressInfo.pos || 0) / 1000),
     [progressInfo.pos]
   );
+  // Preview lead: show words 0.5s earlier
+  const visibleTimeS = useMemo(() => Math.max(0, currentTimeS + 0.5), [currentTimeS]);
   // Group words into timed lines (similar to KaraokeLyrics)
   const groupAlignedWordsToLines = (words = [], { removeTags = true } = {}) => {
     const out = [];
@@ -296,13 +298,13 @@ const MusicDetails = () => {
     if (!lines || lines.length === 0) return -1;
     for (let i = 0; i < lines.length; i++) {
       const L = lines[i];
-      if (currentTimeS >= (L.startS || 0) && currentTimeS <= (L.endS || 0))
+      if (visibleTimeS >= (L.startS || 0) && visibleTimeS <= (L.endS || 0))
         return i;
     }
-    if (currentTimeS > (lines[lines.length - 1]?.endS || 0))
+    if (visibleTimeS > (lines[lines.length - 1]?.endS || 0))
       return lines.length - 1;
     return -1;
-  }, [lines, currentTimeS]);
+  }, [lines, visibleTimeS]);
 
   // Auto-scroll lyrics to keep the current line visible
   const lyricsRef = useRef(null);
@@ -487,7 +489,7 @@ const MusicDetails = () => {
                     <Text
                       key={`w-${i}-${j}`}
                       style={
-                        currentTimeS >= (w.startS || 0)
+                        visibleTimeS >= (w.startS || 0)
                           ? styles.karaokeWordActive
                           : styles.karaokeWord
                       }