Revert "Fix page position loss when switching reader modes"

This reverts commit 5f879f6c83.

app/src/main/kotlin/org/koitharu/kotatsu/reader/ui/pager/BaseReaderFragment.kt

@@ -25,16 +25,18 @@ abstract class BaseReaderFragment<B : ViewBinding> : BaseFragment<B>(), ZoomCont
 		readerAdapter = onCreateAdapter()
 
 		viewModel.content.observe(viewLifecycleOwner) {
-			// Determine which state to use for restoring position:
+			// Use getCurrentState() to handle configuration changes (e.g., screen rotation) properly.
-			// - content.state: explicitly set state (e.g., after mode switch or chapter change)
+			// getCurrentState() always has the most recent reading position, while content.state
-			// - getCurrentState(): current reading position saved in SavedStateHandle
+			// may contain the initial state from when content was first loaded.
 			val currentState = viewModel.getCurrentState()
-			val pendingState = when {
+			if (it.state == null && it.pages.isNotEmpty() && readerAdapter?.hasItems != true) {
-				it.state == null && it.pages.isNotEmpty() && readerAdapter?.hasItems != true -> currentState
+				onPagesChanged(it.pages, currentState)
-				readerAdapter?.hasItems != true && it.state != currentState && currentState != null -> currentState
+			} else if (currentState != null) {
-				else -> it.state
+				// If we have a current state, use it instead of content.state
+				onPagesChanged(it.pages, currentState)
+			} else {
+				onPagesChanged(it.pages, it.state)
 			}
-			onPagesChanged(it.pages, pendingState)
 		}
 	}