fixed bug on opening a book on android

composeApp/src/commonMain/kotlin/net/sergeych/toread/App.kt

@@ -232,9 +232,11 @@ private fun BookReaderApp(
                 is AppState.Error, AppState.LoadingStartup -> defaultLibraryScanPath().orEmpty()
             }
             val nextState = runCatching {
+                val book = Fb2Format.parse(request.bytes, request.displayName)
+                saveActiveReadingFileId(request.id)
                 AppState.Reader(
                     fileId = request.id,
-                    book = Fb2Format.parse(request.bytes, request.displayName),
+                    book = book,
                     libraryItems = emptyList(),
                     scanPath = scanPath,
                 )

composeApp/src/commonMain/kotlin/net/sergeych/toread/AppState.kt

@@ -47,9 +47,11 @@ internal suspend fun loadStartupState(): AppState {
     }
     platformRequest?.let { request ->
         return runCatching {
+            val book = Fb2Format.parse(request.bytes, request.displayName)
+            saveActiveReadingFileId(request.id)
             AppState.Reader(
                 fileId = request.id,
-                book = Fb2Format.parse(request.bytes, request.displayName),
+                book = book,
                 libraryItems = emptyList(),
                 scanPath = scanPath,
             )

composeApp/src/commonMain/kotlin/net/sergeych/toread/ReaderScreen.kt

@@ -7,6 +7,7 @@ import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.LazyListState
 import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.layout.Row
@@ -67,6 +68,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.rememberUpdatedState
 import androidx.compose.runtime.setValue
 import androidx.compose.runtime.snapshotFlow
 import androidx.compose.ui.Alignment
@@ -105,7 +107,7 @@ internal fun BookView(
 ) {
     val stats = remember(book) { BookStats.from(book) }
     val contentPlan = remember(book) { buildReaderContentPlan(book) }
-    val listState = rememberLazyListState()
+    val listState = remember(fileId) { LazyListState() }
     val scope = rememberCoroutineScope()
     val snackbarHostState = remember { SnackbarHostState() }
     var restored by remember(fileId) { mutableStateOf(false) }
@@ -162,6 +164,7 @@ internal fun BookView(
             readAloudResumeSentenceIndex,
             backStack,
         )
+    val currentReadingPositionProvider by rememberUpdatedState { currentReadingPosition() }
 
     fun openPosition(position: ReadingPosition, backStack: List<ReadingPosition>) {
         scope.launch {
@@ -226,6 +229,11 @@ internal fun BookView(
 
     DisposableEffect(fileId) {
         onDispose {
+            if (restored) {
+                scope.launch {
+                    saveLibraryReadingPosition(fileId, currentReadingPositionProvider())
+                }
+            }
             ReadAloudPlatform.stop()
         }
     }