more fixes web + mobile

src/screens/Library/MusicDetails.js

@@ -63,6 +63,8 @@ const MusicDetails = ({ route }) => {
   const [fav, setFav] = useState(false);
   const [currentUID] = useGlobal("currentUID");
   const wasPlayingBeforeSeek = useRef(false);
+  const hasCapturedSeekStateRef = useRef(false);
+  const lastSeekTargetMsRef = useRef(null);
   const listenedMsRef = useRef(0);
   const incrementDoneRef = useRef(false);
   const timerRef = useRef(null);
@@ -330,8 +332,12 @@ const MusicDetails = ({ route }) => {
 
   const handleSliderSeekStart = useCallback(async () => {
     if (!trackDescriptor) return;
-    try {
+    lastSeekTargetMsRef.current = null;
+    if (!hasCapturedSeekStateRef.current) {
+      hasCapturedSeekStateRef.current = true;
       wasPlayingBeforeSeek.current = isTrackPlaying;
+    }
+    try {
       if (!isCurrentTrack) {
         await ensureLoaded({ startPositionMs: positionMs, autoPlay: false });
       }
@@ -355,6 +361,7 @@ const MusicDetails = ({ route }) => {
       const dur = sliderDurationMs || 0;
       if (!trackDescriptor || dur <= 0) return;
       const targetMs = Math.max(0, Math.floor(dur * ratio));
+      lastSeekTargetMsRef.current = targetMs;
       try {
         if (!isCurrentTrack) {
           await ensureLoaded({ startPositionMs: targetMs, autoPlay: false });
@@ -422,11 +429,24 @@ const MusicDetails = ({ route }) => {
   ]);
 
   const handleSliderSeekEnd = useCallback(async () => {
+    const targetMs =
+      typeof lastSeekTargetMsRef.current === "number"
+        ? Math.max(0, lastSeekTargetMsRef.current)
+        : null;
     try {
       if (wasPlayingBeforeSeek.current) {
         if (!isCurrentTrack) {
-          await ensureLoaded({ startPositionMs: positionMs, autoPlay: true });
+          await ensureLoaded({
+            startPositionMs:
+              targetMs !== null && Number.isFinite(targetMs)
+                ? targetMs
+                : positionMs,
+            autoPlay: true,
+          });
         } else {
+          if (targetMs !== null && Number.isFinite(targetMs)) {
+            await seekTrackTo(targetMs);
+          }
           await resumeTrack();
         }
       }
@@ -434,8 +454,10 @@ const MusicDetails = ({ route }) => {
       console.log("MusicDetails seek end error", e?.message);
     } finally {
       wasPlayingBeforeSeek.current = false;
+      hasCapturedSeekStateRef.current = false;
+      lastSeekTargetMsRef.current = null;
     }
-  }, [ensureLoaded, isCurrentTrack, positionMs, resumeTrack]);
+  }, [ensureLoaded, isCurrentTrack, positionMs, resumeTrack, seekTrackTo]);
 
   const handleSeekBySeconds = useCallback(
     async (deltaSeconds) => {