Cover channel closure and keep stream selection usable for long lists

tools/chatgui-android/app/src/main/java/com/utun/chat/ui/screens/ChatScreen.kt

@@ -15,6 +15,7 @@ import androidx.compose.foundation.combinedClickable
 import androidx.compose.foundation.ExperimentalFoundationApi
 import androidx.compose.foundation.gestures.awaitFirstDown
 import androidx.compose.foundation.horizontalScroll
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.rememberScrollState
@@ -107,7 +108,7 @@ fun ChatScreen(
         onDismissRequest = { chooseStream = false },
         title = { Text(stringResource(R.string.stream_choose_source)) },
         text = {
-            Column {
+            Column(Modifier.heightIn(max = 360.dp).verticalScroll(rememberScrollState())) {
                 streams.forEach { source ->
                     TextButton(onClick = { chooseStream = false; onWatchStream(source) }) {
                         Text("${source.displayName} · ${source.id.toULong()}")