[fix] Crash while empty class set

app/src/main/java/com/acitelight/aether/view/VideoScreen.kt

@@ -298,27 +298,6 @@ fun CatalogueItemRow(
     }
 }
 
-@OptIn(ExperimentalMaterial3Api::class)
-@Composable
-fun TopRow(videoScreenViewModel: VideoScreenViewModel) {
-    val tabIndex by videoScreenViewModel.tabIndex;
-    if (videoScreenViewModel.videoLibrary.classes.isEmpty()) return
-    val colorScheme = MaterialTheme.colorScheme
-
-    ScrollableTabRow(
-        selectedTabIndex = tabIndex,
-        modifier = Modifier.background(colorScheme.surface)
-    ) {
-        videoScreenViewModel.videoLibrary.classes.forEachIndexed { index, title ->
-            Tab(
-                selected = tabIndex == index,
-                onClick = { videoScreenViewModel.setTabIndex(index) },
-                text = { Text(text = title, maxLines = 1) },
-            )
-        }
-    }
-}
-
 @Composable
 fun VideoCard(
     video: Video,

app/src/main/java/com/acitelight/aether/viewModel/VideoScreenViewModel.kt

@@ -53,6 +53,9 @@ class VideoScreenViewModel @Inject constructor(
 
         if (Global.loggedIn) {
             videoLibrary.classes.addAll(mediaManager.listVideoKlasses())
+            if(videoLibrary.classes.isEmpty())
+                return
+
             var i = 0
             for (it in videoLibrary.classes) {
                 videoLibrary.updatingMap[i++] = false