Scroll fix (#281)

* auto scroll

* scroll fix

app/src/main/java/com/bitchat/android/ui/ChatScreen.kt

@@ -50,6 +50,7 @@ fun ChatScreen(viewModel: ChatViewModel) {
     var showPasswordDialog by remember { mutableStateOf(false) }
     var passwordInput by remember { mutableStateOf("") }
     var showLocationChannelsSheet by remember { mutableStateOf(false) }
+    var forceScrollToBottom by remember { mutableStateOf(false) }
 
     // Show password dialog when needed
     LaunchedEffect(showPasswordPrompt) {
@@ -85,7 +86,8 @@ fun ChatScreen(viewModel: ChatViewModel) {
                 messages = displayMessages,
                 currentUserNickname = nickname,
                 meshService = viewModel.meshService,
-                modifier = Modifier.weight(1f)
+                modifier = Modifier.weight(1f),
+                forceScrollToBottom = forceScrollToBottom
             )
             // Input area - stays at bottom
             ChatInputSection(
@@ -99,6 +101,7 @@ fun ChatScreen(viewModel: ChatViewModel) {
                     if (messageText.text.trim().isNotEmpty()) {
                         viewModel.sendMessage(messageText.text.trim())
                         messageText = TextFieldValue("")
+                        forceScrollToBottom = !forceScrollToBottom // Toggle to trigger scroll
                     }
                 },
                 showCommandSuggestions = showCommandSuggestions,

app/src/main/java/com/bitchat/android/ui/MessageComponents.kt

@@ -31,13 +31,37 @@ fun MessagesList(
     messages: List<BitchatMessage>,
     currentUserNickname: String,
     meshService: BluetoothMeshService,
-    modifier: Modifier = Modifier
+    modifier: Modifier = Modifier,
+    forceScrollToBottom: Boolean = false
 ) {
     val listState = rememberLazyListState()
     
-    // Auto-scroll to bottom when new messages arrive
+    // Track if this is the first time messages are being loaded
+    var hasScrolledToInitialPosition by remember { mutableStateOf(false) }
+    
+    // Smart scroll: auto-scroll to bottom for initial load, then only when user is at or near the bottom
     LaunchedEffect(messages.size) {
         if (messages.isNotEmpty()) {
+            val layoutInfo = listState.layoutInfo
+            val lastVisibleIndex = layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: -1
+            val totalItems = layoutInfo.totalItemsCount
+            
+            // Always scroll to bottom on first load, or when user is near the bottom
+            val isFirstLoad = !hasScrolledToInitialPosition
+            val isNearBottom = lastVisibleIndex >= totalItems - 3
+            
+            if (isFirstLoad || isNearBottom) {
+                listState.animateScrollToItem(messages.size - 1)
+                if (isFirstLoad) {
+                    hasScrolledToInitialPosition = true
+                }
+            }
+        }
+    }
+    
+    // Force scroll to bottom when requested (e.g., when user sends a message)
+    LaunchedEffect(forceScrollToBottom) {
+        if (forceScrollToBottom && messages.isNotEmpty()) {
             listState.animateScrollToItem(messages.size - 1)
         }
     }