fix(unread): Ensure unread button is also initially on-updates shown if needed

AI-assistant: Copilot 1.0.10 (Claude Sonnet 4.6)

Signed-off-by: Andy Scherzinger <info@andy-scherzinger.de>

Author: AndyScherzinger

app/src/main/java/com/nextcloud/talk/conversationlist/ui/ConversationList.kt

@@ -33,6 +33,7 @@ import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.runtime.snapshotFlow
+import kotlinx.coroutines.flow.first
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
@@ -113,6 +114,19 @@ fun ConversationList(
             }
     }
 
+    // Unread-bubble: also trigger the check after entries are first loaded (or updated)
+    LaunchedEffect(entries) {
+        if (entries.isEmpty()) {
+            onScrollStopped(0)
+            return@LaunchedEffect
+        }
+        // Wait until the LazyColumn has measured visible items so the last-visible index is accurate.
+        snapshotFlow { listState.layoutInfo.visibleItemsInfo }
+            .first { it.isNotEmpty() }
+        val lastVisible = listState.layoutInfo.visibleItemsInfo.lastOrNull()?.index ?: 0
+        onScrollStopped(lastVisible)
+    }
+
     PullToRefreshBox(
         isRefreshing = isRefreshing,
         onRefresh = onRefresh,