diff --git a/doc/tasks.md b/doc/tasks.md
index b4194633..53903725 100644
--- a/doc/tasks.md
+++ b/doc/tasks.md
@@ -9,6 +9,9 @@
     В логе получатель дважды отклонил приглашение и отправил ACK; отправитель до проверки получил только late ACK request=507.
     Отдельный повтор прошёл. Причина не установлена; проверить доставку UDP и шаги ускоренных часов под параллельной нагрузкой.
     Логи: /tmp/config-name-local-transport-failure.log, /tmp/config-name-local-transport-retry.log.
+    Ещё один общий прогон 19.10: 161/162, chat_adapter упал на строке 145 при ожидании доставки request=501.
+    Получатель принял приглашение и дважды отправил ACK; до проверки в логе отправителя нет приёма этого ACK. Отдельный повтор прошёл.
+    Логи: /tmp/utun-stream-preview-local-transport-failure.log, /tmp/utun-stream-preview-local-transport-retry.log.
 
 [ ] **Разобрать нестабильную проверку аудиопауз desktop-трансляции** — 17.10.2026:
     При проверке зума test_stream_view::realH264RenderingAndClose получил silenceGaps=3 вместо gapsBefore=2.
diff --git a/tools/chatgui-android/app/src/main/java/com/utun/chat/ui/screens/StreamScreen.kt b/tools/chatgui-android/app/src/main/java/com/utun/chat/ui/screens/StreamScreen.kt
index ab3116aa..bf8e1a1f 100644
--- a/tools/chatgui-android/app/src/main/java/com/utun/chat/ui/screens/StreamScreen.kt
+++ b/tools/chatgui-android/app/src/main/java/com/utun/chat/ui/screens/StreamScreen.kt
@@ -24,7 +24,8 @@ import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material.icons.automirrored.filled.VolumeOff
 import androidx.compose.material.icons.automirrored.filled.VolumeUp
 import androidx.compose.material.icons.filled.Check
-import androidx.compose.material.icons.filled.Close
+import androidx.compose.material.icons.filled.PlayArrow
+import androidx.compose.material.icons.filled.Stop
 import androidx.compose.material.icons.outlined.Person
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
@@ -35,6 +36,7 @@ import androidx.compose.ui.geometry.Offset
 import androidx.compose.ui.geometry.Size
 import androidx.compose.ui.graphics.StrokeCap
 import androidx.compose.ui.graphics.Path
+import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.graphics.drawscope.Stroke
 import androidx.compose.ui.graphics.drawscope.rotate
 import androidx.compose.ui.semantics.clearAndSetSemantics
@@ -145,54 +147,57 @@ fun StreamScreen(channelId: String, channelName: String, sources: List<StreamSou
         })
     }) { padding ->
         Column(Modifier.fillMaxSize().padding(padding).padding(12.dp), verticalArrangement = Arrangement.spacedBy(8.dp)) {
-            StreamCaptureToolbar(cameras, shownConfig, displayDegrees,
-                enabled = if (ongoing != null) ongoing.phase == StreamPhase.LIVE && ongoing.pendingConfig == null else !loadingModes,
-                audio = shownAudio,
-                audioEnabled = if (ongoing != null) ongoing.phase == StreamPhase.LIVE && ongoing.audioAvailable else !loadingModes,
-                onAudioChange = {
-                    LogManager.addLog("INFO", "stream", "screen audio group=$group enabled=$it live=${ongoing != null}")
-                    if (ongoing != null) StreamController.setAudioEnabled(it)
-                    else { audio = it; StreamController.rememberSettings(audio = it) }
-                }, onChange = {
-                    LogManager.addLog("INFO", "stream", "screen capture selection group=$group live=${ongoing != null} config=$it")
-                    if (ongoing != null) StreamController.change(it)
-                    else { config = it; StreamController.rememberSettings(config = it) }
-                })
-            if (selected != null) {
-                Text(selected.displayName, style = MaterialTheme.typography.titleSmall)
-                if (selected.self && local?.ongoing == true) {
-                    CaptureModeStatus(local.config, local.pendingConfig, local.notice)
-                    StreamTxPanel(local.id)
+            Row(Modifier.fillMaxWidth(), horizontalArrangement = Arrangement.spacedBy(8.dp), verticalAlignment = Alignment.CenterVertically) {
+                StreamCaptureToolbar(cameras, shownConfig, displayDegrees, Modifier.weight(1f),
+                    enabled = if (ongoing != null) ongoing.phase == StreamPhase.LIVE && ongoing.pendingConfig == null else !loadingModes,
+                    audio = shownAudio,
+                    audioEnabled = if (ongoing != null) ongoing.phase == StreamPhase.LIVE && ongoing.audioAvailable else !loadingModes,
+                    onAudioChange = {
+                        LogManager.addLog("INFO", "stream", "screen audio group=$group enabled=$it live=${ongoing != null}")
+                        if (ongoing != null) StreamController.setAudioEnabled(it)
+                        else { audio = it; StreamController.rememberSettings(audio = it) }
+                    }, onChange = {
+                        LogManager.addLog("INFO", "stream", "screen capture selection group=$group live=${ongoing != null} config=$it")
+                        if (ongoing != null) StreamController.change(it)
+                        else { config = it; StreamController.rememberSettings(config = it) }
+                    })
+                val action = if (ongoing == null) R.string.stream_start
+                    else if (ongoing.phase == StreamPhase.STOPPING) R.string.stream_stopping else R.string.stream_stop
+                StreamControlButton(stringResource(action),
+                    enabled = if (ongoing != null) ongoing.phase != StreamPhase.STOPPING
+                        else !loadingModes && config != null && group != 0L && state?.ongoing != true,
+                    containerColor = if (ongoing != null) Color(0xFFB32632) else Color(0xFF24633D), onClick = {
+                        if (ongoing != null) {
+                            LogManager.addLog("INFO", "stream", "screen stop group=$group id=${ongoing.id} phase=${ongoing.phase}")
+                            StreamController.stop()
+                        } else if (!cameraGranted || (audio && !micGranted)) {
+                            LogManager.addLog("INFO", "stream", "screen permissions group=$group camera=$cameraGranted mic=$micGranted audio=$audio")
+                            permissions.launch(listOf(Manifest.permission.CAMERA)
+                                .plus(if (audio) listOf(Manifest.permission.RECORD_AUDIO) else emptyList()).toTypedArray())
+                        } else config?.let {
+                            LogManager.addLog("INFO", "stream", "screen start group=$group audio=$audio config=$it")
+                            StreamController.start(group, it, audio)
+                        }
+                    }) {
+                    Icon(if (ongoing != null) Icons.Filled.Stop else Icons.Filled.PlayArrow,
+                        contentDescription = null, modifier = Modifier.size(32.dp))
                 }
+            }
+            if (ongoing != null) {
+                CaptureModeStatus(ongoing.config, ongoing.pendingConfig, ongoing.notice)
+                if (ongoing.phase == StreamPhase.STOPPING) Text(stringResource(R.string.stream_stopping))
+                StreamTxPanel(ongoing.id)
+            }
+            if (selected != null) {
                 Box(Modifier.weight(1f).fillMaxWidth()) {
                     if (selected.self && local?.ongoing != true) Text(stringResource(R.string.stream_ended))
                     else key(group, selected.id, selected.epoch) {
                         local?.preview?.let { LiveStreamView(it, displayDegrees) }
                     }
                 }
-                IconButton(onClick = { onSelect(null); onBack() }) { Icon(Icons.Filled.Close, stringResource(R.string.stream_close_view)) }
-                if (selected.self && local?.ongoing == true) Button(onClick = StreamController::stop,
-                    enabled = local.phase != StreamPhase.STOPPING) { Text(stringResource(R.string.stream_stop)) }
             } else {
-                if (local?.ongoing == true) {
-                    CaptureModeStatus(local.config, local.pendingConfig, local.notice)
-                    StreamTxPanel(local.id)
-                    Text(stringResource(when (local.phase) {
-                        StreamPhase.LIVE -> R.string.stream_live
-                        StreamPhase.STOPPING -> R.string.stream_stopping
-                        else -> R.string.stream_connecting
-                    }))
-                    Button(onClick = StreamController::stop, enabled = local.phase != StreamPhase.STOPPING) { Text(stringResource(R.string.stream_stop)) }
-                } else {
-                    if (!loadingModes && cameras.isEmpty()) Text(stringResource(R.string.stream_no_modes), color = MaterialTheme.colorScheme.error)
-                    Button(onClick = {
-                        if (!cameraGranted || (audio && !micGranted)) permissions.launch(
-                            listOf(Manifest.permission.CAMERA).plus(if (audio) listOf(Manifest.permission.RECORD_AUDIO) else emptyList()).toTypedArray())
-                        else {
-                            config?.let { StreamController.start(group, it, audio) }
-                        }
-                    }, enabled = config != null && group != 0L && state?.ongoing != true) { Text(stringResource(R.string.stream_start)) }
-                }
+                if (ongoing == null && !loadingModes && cameras.isEmpty())
+                    Text(stringResource(R.string.stream_no_modes), color = MaterialTheme.colorScheme.error)
                 local?.error?.let { Text(stringResource(it), color = MaterialTheme.colorScheme.error) }
                 if (sourcesFailed) Text(stringResource(R.string.stream_list_failed), color = MaterialTheme.colorScheme.error)
                 else if (sources.isEmpty() && local?.ongoing != true) Text(stringResource(R.string.stream_none))
@@ -217,9 +222,9 @@ private fun StreamTxPanel(id: Long) {
     val s = snapshot?.takeIf { it.id == id } ?: return
     Column {
         Text(stringResource(R.string.stream_tx_queues, s.videoBytes / 1024.0, s.inflightBytes / 1024.0),
-            style = MaterialTheme.typography.bodySmall, minLines = 2)
+            style = MaterialTheme.typography.bodySmall)
         Text(stringResource(R.string.stream_tx_total, s.totalBytes / 1024.0, s.acked1s / 1024.0, s.acked1s * 8 / 1_000_000.0),
-            style = MaterialTheme.typography.bodySmall, minLines = 2)
+            style = MaterialTheme.typography.bodySmall)
     }
 }
 
@@ -228,7 +233,7 @@ private enum class StreamIconShape { CAMERA, CHIP, GAUGE, SCREEN }
 
 /** Одна строка управления: значки отражают применённый режим, меню сохраняют все варианты выбора. */
 @Composable
-private fun StreamCaptureToolbar(cameras: List<StreamCamera>, config: StreamCaptureConfig?, display: Int,
+private fun StreamCaptureToolbar(cameras: List<StreamCamera>, config: StreamCaptureConfig?, display: Int, modifier: Modifier,
                                  enabled: Boolean, audio: Boolean, audioEnabled: Boolean, onAudioChange: (Boolean) -> Unit,
                                  onChange: (StreamCaptureConfig) -> Unit) {
     val mode = config?.mode
@@ -250,7 +255,7 @@ private fun StreamCaptureToolbar(cameras: List<StreamCamera>, config: StreamCapt
     val bitrateValue = config?.let { stringResource(R.string.stream_bitrate_value, it.bitrate / 1_000_000.0) } ?: "—"
     val bitrateDescription = if (config != null && config.videoBitrate == null)
         stringResource(R.string.stream_bitrate_auto_value, bitrateValue) else stringResource(R.string.stream_bitrate, bitrateValue)
-    Row(Modifier.fillMaxWidth().horizontalScroll(rememberScrollState()), horizontalArrangement = Arrangement.spacedBy(4.dp),
+    Row(modifier.horizontalScroll(rememberScrollState()), horizontalArrangement = Arrangement.spacedBy(4.dp),
         verticalAlignment = Alignment.CenterVertically) {
         StreamControlButton(stringResource(if (audio) R.string.stream_audio_on else R.string.stream_audio_off),
             enabled = audioEnabled, checked = audio, onClick = { onAudioChange(!audio) }) {
@@ -347,21 +352,23 @@ private fun StreamCaptureToolbar(cameras: List<StreamCamera>, config: StreamCapt
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
 private fun StreamControlButton(description: String, enabled: Boolean = true, checked: Boolean? = null,
-                                onClick: () -> Unit, icon: @Composable () -> Unit) {
+                                containerColor: Color? = null, onClick: () -> Unit, icon: @Composable () -> Unit) {
     TooltipBox(positionProvider = TooltipDefaults.rememberPlainTooltipPositionProvider(), tooltip = { PlainTooltip { Text(description) } },
         state = rememberTooltipState()) {
         val modifier = Modifier.size(48.dp).semantics { contentDescription = description }
         val colors = MaterialTheme.colorScheme
-        val background = colors.surfaceVariant.copy(alpha = 0.55f)
+        val background = containerColor ?: colors.surfaceVariant.copy(alpha = 0.55f)
+        val disabledBackground = containerColor?.copy(alpha = 0.38f) ?: colors.surfaceVariant.copy(alpha = 0.2f)
+        val content = if (containerColor != null) Color.White else colors.onSurface
         val shape = RoundedCornerShape(12.dp)
         if (checked == null) FilledTonalIconButton(onClick = onClick, enabled = enabled, modifier = modifier, shape = shape,
-            colors = IconButtonDefaults.filledTonalIconButtonColors(containerColor = background, contentColor = colors.onSurface,
-                disabledContainerColor = colors.surfaceVariant.copy(alpha = 0.2f))) {
+            colors = IconButtonDefaults.filledTonalIconButtonColors(containerColor = background, contentColor = content,
+                disabledContainerColor = disabledBackground, disabledContentColor = content.copy(alpha = 0.38f))) {
             Box(Modifier.clearAndSetSemantics {}) { icon() }
         } else FilledTonalIconToggleButton(checked = checked, onCheckedChange = { onClick() }, enabled = enabled,
             modifier = modifier, shape = shape,
             colors = IconButtonDefaults.filledTonalIconToggleButtonColors(containerColor = background, contentColor = colors.onSurfaceVariant,
-                disabledContainerColor = colors.surfaceVariant.copy(alpha = 0.2f), checkedContainerColor = colors.primaryContainer,
+                disabledContainerColor = disabledBackground, checkedContainerColor = colors.primaryContainer,
                 checkedContentColor = colors.onPrimaryContainer)) {
             Box(Modifier.clearAndSetSemantics {}) { icon() }
         }
@@ -513,12 +520,17 @@ internal fun StreamDisplayDegrees(): Int {
 private fun CameraPreviewSurface(preview: StreamPreview, displayDegrees: Int) {
     val state by preview.state.collectAsState()
     val aspect = state.format?.aspect(displayDegrees) ?: 9f / 16f
-    Column(Modifier.fillMaxSize()) {
-        Text(stringResource(if (state.failed) R.string.stream_preview_failed else if (state.active) R.string.stream_live else R.string.stream_connecting))
-        Box(Modifier.weight(1f).fillMaxWidth(), contentAlignment = Alignment.Center) {
-            Box(Modifier.aspectRatio(aspect, matchHeightConstraintsFirst = true)) {
-                AndroidView(factory = { CameraPreviewView(it, preview) }, modifier = Modifier.matchParentSize(),
-                    update = { it.update(state.format, displayDegrees) }, onRelease = { it.close() })
+    Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
+        Box(Modifier.aspectRatio(aspect, matchHeightConstraintsFirst = true)) {
+            AndroidView(factory = { CameraPreviewView(it, preview) }, modifier = Modifier.matchParentSize(),
+                update = { it.update(state.format, displayDegrees) }, onRelease = { it.close() })
+        }
+        if (state.failed || !state.active) {
+            Surface(Modifier.align(Alignment.TopCenter).padding(8.dp), shape = RoundedCornerShape(8.dp),
+                color = MaterialTheme.colorScheme.surface.copy(alpha = 0.9f)) {
+                Text(stringResource(if (state.failed) R.string.stream_preview_failed else R.string.stream_connecting),
+                    Modifier.padding(horizontal = 8.dp, vertical = 4.dp),
+                    color = if (state.failed) MaterialTheme.colorScheme.error else MaterialTheme.colorScheme.onSurface)
             }
         }
     }