Improved TOC scrolling behavior and fixed incorrect content indentation logic. Added test for image-only sections.

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

@@ -1551,7 +1551,7 @@ internal fun buildReaderContentPlan(book: Fb2Book): ReaderContentPlan {
                 }
             }
         }
-        val childDepth = if (blocks.isEmpty()) readerDepth else readerDepth + 1
+        val childDepth = if (blocks.hasIndentBearingContent()) readerDepth + 1 else readerDepth
         addSections(section.sections, childDepth)
     }
 
@@ -1811,6 +1811,19 @@ private fun Fb2Section.readableBlocks(): List<Fb2Block> =
         images.map(Fb2Block::Image) + paragraphs.map { Fb2Block.Paragraph(Fb2Text(listOf(Fb2TextSpan(it)))) }
     }
 
+private fun List<Fb2Block>.hasIndentBearingContent(): Boolean =
+    any { block ->
+        when (block) {
+            Fb2Block.EmptyLine,
+            is Fb2Block.Image,
+            is Fb2Block.Subtitle -> false
+            is Fb2Block.Cite,
+            is Fb2Block.Epigraph,
+            is Fb2Block.Paragraph,
+            is Fb2Block.Poem -> true
+        }
+    }
+
 private data class ChapterEntry(
     val title: String,
     val section: Fb2Section,

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

@@ -693,11 +693,23 @@ private fun TableOfContentsDialog(
     onOpenEntry: (ReaderTocEntry) -> Unit,
     onDismiss: () -> Unit,
 ) {
+    val selectedEntryIndex = currentItemIndex?.let { itemIndex ->
+        contentPlan.tocEntries.indexOfFirst { it.itemIndex == itemIndex }.takeIf { it >= 0 }
+    }
+    val listState = rememberLazyListState(
+        initialFirstVisibleItemIndex = selectedEntryIndex?.let { it + 1 } ?: 0,
+    )
+
+    LaunchedEffect(contentPlan, selectedEntryIndex) {
+        selectedEntryIndex?.let { listState.scrollToItem(it + 1) }
+    }
+
     AlertDialog(
         onDismissRequest = onDismiss,
         title = { Text(strings.tableOfContents) },
         text = {
             LazyColumn(
+                state = listState,
                 modifier = Modifier.fillMaxWidth().heightIn(max = 480.dp),
             ) {
                 item(key = "back") {