fix: improve voice and chat controls

apps/chanora_flutter/lib/main.dart

@@ -174,6 +174,7 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
   bool _hardMute = false;
   bool _hardMuteByPermission = false;
   bool _hardMuteByTalkPower = false;
+  bool _hardMuteByOutputMute = false;
   bool _permissionHardMuteClearInFlight = false;
   int _releaseTailMs = 200;
   BigInt? _currentVoiceChannelId;
@@ -212,6 +213,7 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
   final ValueNotifier<int> _chatFeedRevision = ValueNotifier(0);
   int _chatUnread = 0;
   bool _chatOpen = false;
+  bool _chatPreviewSnackBarVisible = false;
   final ValueNotifier<List<_ReceivedPoke>> _pokeSnackBarPokes = ValueNotifier(
     const [],
   );
@@ -484,8 +486,10 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
       await rust.setHardMute(muted: false);
       if (!mounted || !_hardMuteByPermission) return;
       setState(() {
-        _hardMute = false;
         _hardMuteByPermission = false;
+        if (!_inputMuted && !_hardMuteByTalkPower && !_hardMuteByOutputMute) {
+          _hardMute = false;
+        }
       });
     } catch (e) {
       if (!mounted) return;
@@ -1010,6 +1014,14 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
       if (!mounted) return;
       setState(() {
         _outputMuted = next;
+        _hardMuteByOutputMute = next;
+        if (next) {
+          _hardMute = true;
+        } else if (!_inputMuted &&
+            !_hardMuteByPermission &&
+            !_hardMuteByTalkPower) {
+          _hardMute = false;
+        }
       });
     } catch (e) {
       if (!mounted) return;
@@ -1104,8 +1116,9 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
   }
 
   Future<void> _onToggleHardMute() async {
-    // Don't allow manual unmute when talk-power-muted.
-    if (_hardMuteByTalkPower && _hardMute) {
+    // Don't allow manual unmute while another policy owns the local
+    // transmit clamp.
+    if ((_hardMuteByTalkPower || _hardMuteByOutputMute) && _hardMute) {
       return;
     }
     final next = !_hardMute;
@@ -1200,6 +1213,8 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
       pttBoundInputClass: _pttBoundInputClass,
       isTouchOnly: isTouchOnlyPttHost,
       initialAudioConfig: audioConfig,
+      onnxRuntimeAvailable:
+          StartupDependencyScope.maybeOf(context)?.hasOnnxRuntime ?? true,
       onModeChanged: (mode) async {
         try {
           await rust.setTransmitMode(mode: mode);
@@ -1241,6 +1256,8 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
         initialMode: _transmitMode,
         initialReleaseTailMs: _releaseTailMs,
         initialAudioConfig: audioConfig,
+        onnxRuntimeAvailable:
+            StartupDependencyScope.maybeOf(ctx)?.hasOnnxRuntime ?? true,
         pttLevel: _pttLevel,
         pttBackendId: _pttBackendId,
         pttBoundInputClass: _pttBoundInputClass,
@@ -1399,6 +1416,10 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
     _audioStats = null;
     _inputMuted = false;
     _outputMuted = false;
+    _hardMute = false;
+    _hardMuteByPermission = false;
+    _hardMuteByTalkPower = false;
+    _hardMuteByOutputMute = false;
     _inChannel = false;
     _currentVoiceChannelId = null;
     _pendingVoiceChannelId = null;
@@ -1418,6 +1439,7 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
     String clientName = '',
   }) async {
     final initialSnapshot = _snapshot!;
+    _dismissChatPreviewSnackBar();
     setState(() {
       _chatUnread = 0;
       _chatOpen = true;
@@ -1500,36 +1522,50 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
     if (_pokeSnackBarPokes.value.isNotEmpty) return;
     final messenger = ScaffoldMessenger.of(context);
     messenger.hideCurrentSnackBar();
-    messenger.showSnackBar(
+    _chatPreviewSnackBarVisible = true;
+    void openChatFromPreview() {
+      _dismissChatPreviewSnackBar();
+      unawaited(
+        _onOpenChat(
+          target: target,
+          clientName: _chatClientNameForTarget(target, senderName),
+        ),
+      );
+    }
+
+    final controller = messenger.showSnackBar(
       SnackBar(
         behavior: SnackBarBehavior.floating,
         margin: _chatSnackBarMargin(),
-        duration: const Duration(seconds: 7),
-        content: Column(
-          mainAxisSize: MainAxisSize.min,
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            Text(
-              '$senderName (${_chatTargetLabel(target)})',
-              maxLines: 1,
-              overflow: TextOverflow.ellipsis,
-              style: const TextStyle(fontWeight: FontWeight.w600),
-            ),
-            const SizedBox(height: 4),
-            Text(message, maxLines: 3, overflow: TextOverflow.ellipsis),
-          ],
-        ),
-        action: SnackBarAction(
-          label: 'Open',
-          onPressed: () => unawaited(
-            _onOpenChat(
-              target: target,
-              clientName: _chatClientNameForTarget(target, senderName),
-            ),
+        duration: const Duration(seconds: 4),
+        content: GestureDetector(
+          behavior: HitTestBehavior.opaque,
+          onTap: openChatFromPreview,
+          child: Column(
+            mainAxisSize: MainAxisSize.min,
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              Text(
+                '$senderName (${_chatTargetLabel(target)})',
+                maxLines: 1,
+                overflow: TextOverflow.ellipsis,
+                style: const TextStyle(fontWeight: FontWeight.w600),
+              ),
+              const SizedBox(height: 4),
+              Text(message, maxLines: 3, overflow: TextOverflow.ellipsis),
+            ],
           ),
         ),
+        action: SnackBarAction(label: 'Open', onPressed: openChatFromPreview),
       ),
     );
+    controller.closed.then((_) => _chatPreviewSnackBarVisible = false);
+  }
+
+  void _dismissChatPreviewSnackBar() {
+    if (!_chatPreviewSnackBarVisible || !mounted) return;
+    _chatPreviewSnackBarVisible = false;
+    ScaffoldMessenger.of(context).removeCurrentSnackBar();
   }
 
   EdgeInsetsGeometry _chatSnackBarMargin() {
@@ -1589,6 +1625,14 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
     if (own == null) return;
     _inputMuted = own.inputMuted;
     _outputMuted = own.outputMuted;
+    _hardMuteByOutputMute = own.outputMuted;
+    if (own.outputMuted) {
+      _hardMute = true;
+    } else if (!_inputMuted &&
+        !_hardMuteByPermission &&
+        !_hardMuteByTalkPower) {
+      _hardMute = false;
+    }
     if (!_voiceStateInitialized || _currentVoiceChannelId == null) {
       _currentVoiceChannelId = own.channelId;
       _pendingVoiceChannelId = null;
@@ -1607,7 +1651,7 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
       rust.setInputMuted(muted: true);
     } else if (own.talkPowerOk && _hardMuteByTalkPower) {
       _hardMuteByTalkPower = false;
-      if (!_hardMuteByPermission) {
+      if (!_hardMuteByPermission && !_hardMuteByOutputMute && !_inputMuted) {
         _hardMute = false;
         rust.setHardMute(muted: false);
         rust.setInputMuted(muted: false);
@@ -1622,12 +1666,12 @@ class _BetaHomeState extends State<_BetaHome> with WidgetsBindingObserver {
 
   Future<void> _onShowDiagnostics(BuildContext context) async {
     final l10n = AppL10n.of(context);
-    final rustText = rust.exportDiagnostics();
+    final rustText = await rust.exportDiagnostics();
+    if (!context.mounted) return;
     final uiText = _uiDiagnostics.isEmpty
         ? 'UI diagnostics: none'
         : ['UI diagnostics:', ..._uiDiagnostics].join('\n');
     final text = '$uiText\n\nRust diagnostics:\n$rustText';
-    if (!mounted) return;
     await showDialog<void>(
       context: context,
       builder: (ctx) => AlertDialog(