feat(voice): add iOS VAD runtime support

2026-05-21 20:51:45 +09:00
parent 171baf6e41
commit 6af4ecab0f
73 changed files with 11529 additions and 1249 deletions
@@ -9,9 +9,9 @@
 //     (all carried over from v0.3.0-beta.1)

 import 'dart:async';
+import 'dart:io' show File, Platform, Process;

 import 'package:connectivity_plus/connectivity_plus.dart';
-import 'dart:io' show Platform, Process;

 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
@@ -21,18 +21,54 @@ import 'package:path_provider/path_provider.dart';

 import 'l10n/generated/app_localizations.dart';
 import 'services/android_permissions_service.dart';
+import 'services/ios_permissions_service.dart';
 import 'src/rust/api.dart' as rust;
 import 'src/rust/lib.dart' as rust_err;
 import 'src/rust/frb_generated.dart';
 import 'widgets/permission_state_banner.dart';
+import 'widgets/voice_platform.dart';
 import 'widgets/voice_bar.dart';
 import 'widgets/voice_compact.dart';
 import 'widgets/voice_settings.dart';

 bool get _isMacOS => !kIsWeb && Platform.isMacOS;

+const MethodChannel _iosPlatformChannel = MethodChannel('chanora/ios_platform');
+
 const Color _appSurfaceColor = Color(0xFFFFFBFE);

+const String _sileroVadAsset = 'assets/models/silero_vad.onnx';
+const String _tenVadAsset = 'assets/models/ten_vad.onnx';
+
+Future<File> _copyBundledAssetToDocuments({
+  required String assetPath,
+  required String fileName,
+}) async {
+  final dir = await getApplicationDocumentsDirectory();
+  final file = File('${dir.path}/$fileName');
+  final data = await rootBundle.load(assetPath);
+  final bytes = data.buffer.asUint8List(data.offsetInBytes, data.lengthInBytes);
+
+  if (await file.exists() && await file.length() == bytes.length) {
+    return file;
+  }
+
+  await file.writeAsBytes(bytes, flush: true);
+  return file;
+}
+
+Future<void> _configureBundledVadModels() async {
+  final silero = await _copyBundledAssetToDocuments(
+    assetPath: _sileroVadAsset,
+    fileName: 'silero_vad.onnx',
+  );
+  await _copyBundledAssetToDocuments(
+    assetPath: _tenVadAsset,
+    fileName: 'ten_vad.onnx',
+  );
+  await rust.setVadModelPath(path: silero.path);
+}
+
 /// Top padding for macOS to clear traffic-light buttons.
 const double _macOSTrafficLightPad = 56.0;

@@ -78,15 +114,6 @@ String? _pttDisplayLabelForKey(LogicalKeyboardKey k) {
  return fallback;
 }

-/// True when the host is a touch-only mobile platform without a
-/// hardware keyboard. Mirrors the helpers in widgets/voice_bar.dart
-/// and widgets/voice_settings.dart so the AppBar + narrow-mode
-/// layout in main.dart can branch consistently.
-bool get _isTouchOnlyPttHost {
-  if (kIsWeb) return false;
-  return Platform.isIOS || Platform.isAndroid;
-}
-
 /// Public version string shown in the About dialog. Resolved at
 /// app init by combining a hardcoded semver baseline (kept in sync
 /// with the git tag and pubspec.yaml's `version:` field) with the
@@ -124,6 +151,23 @@ Future<void> main() async {

 /// Wire the iOS AVAudioSession lifecycle MethodChannel.
 ///
+rust.BridgeAudioRoute _parseBridgeAudioRoute(String s) {
+  switch (s) {
+    case 'Earpiece':
+      return rust.BridgeAudioRoute.earpiece;
+    case 'Speaker':
+      return rust.BridgeAudioRoute.speaker;
+    case 'WiredHeadset':
+      return rust.BridgeAudioRoute.wiredHeadset;
+    case 'BluetoothHfp':
+      return rust.BridgeAudioRoute.bluetoothHfp;
+    case 'BluetoothA2dp':
+      return rust.BridgeAudioRoute.bluetoothA2Dp;
+    default:
+      return rust.BridgeAudioRoute.unknown;
+  }
+}
+
 /// Swift side (AppDelegate) posts route-change and interruption
 /// events through `FlutterMethodChannel` named
 /// `"chanora/ios_audio_lifecycle"`. This handler dispatches them to
@@ -134,7 +178,12 @@ void _wireIosAudioLifecycle() {
    try {
      switch (call.method) {
        case 'handleRouteChange':
-          rust.handleRouteChange();
+          final routeStr = call.arguments as String? ?? 'Unknown';
+          final route = _parseBridgeAudioRoute(routeStr);
+          rust.handleRouteChange(route: route);
+          break;
+        case 'handleMediaServicesReset':
+          rust.handleMediaServicesReset();
          break;
        case 'handleInterruptionBegan':
          rust.handleInterruptionBegan();
@@ -144,6 +193,16 @@ void _wireIosAudioLifecycle() {
          final shouldResume = call.arguments as bool? ?? false;
          rust.handleInterruptionEnded(shouldResume: shouldResume);
          break;
+        case 'handleWillResignActive':
+        case 'handleDidEnterBackground':
+          rust.handleInterruptionBegan();
+          break;
+        case 'handleWillEnterForeground':
+          rust.handleInterruptionEnded(shouldResume: true);
+          break;
+        case 'handleWillTerminate':
+          rust.handleInterruptionBegan();
+          break;
        default:
          // Unknown method — ignore gracefully rather than crashing.
          break;
@@ -315,6 +374,7 @@ class _BetaHomeState extends State<_BetaHome> {
  // (see AndroidPermissionsService for the platform branch).
  final AndroidPermissionsService _androidPermissions =
      AndroidPermissionsService();
+  final IosPermissionsService _iosPermissions = IosPermissionsService();

  @override
  void initState() {
@@ -325,9 +385,13 @@ class _BetaHomeState extends State<_BetaHome> {
    // events as early as possible so the listen-only banner reflects
    // the system state on first frame.
    _androidPermissions.start();
+    unawaited(_iosPermissions.start());
    _androidPermissions.recordAudioState.addListener(
      _onRecordAudioPermissionChanged,
    );
+    _iosPermissions.recordAudioState.addListener(
+      _onRecordAudioPermissionChanged,
+    );
    WidgetsBinding.instance.addPostFrameCallback((_) {
      unawaited(_requestRecordAudioOnStartup());
    });
@@ -337,15 +401,34 @@ class _BetaHomeState extends State<_BetaHome> {

  Future<void> _requestRecordAudioOnStartup() async {
    try {
-      await _androidPermissions.ensureRecordAudio();
+      if (Platform.isAndroid) {
+        await _androidPermissions.ensureRecordAudio();
+      }
    } catch (_) {
      // Best-effort startup prompt only. The join path still gates on
      // ensureRecordAudio() and applies the listen-only hard-mute policy.
    }
  }

+  ValueListenable<AndroidRecordAudioPermissionState>
+  get _activeRecordAudioState => Platform.isIOS
+      ? _iosPermissions.recordAudioState
+      : _androidPermissions.recordAudioState;
+
+  Future<AndroidRecordAudioPermissionState> _ensureActiveRecordAudio() {
+    return Platform.isIOS
+        ? _iosPermissions.ensureRecordAudio()
+        : _androidPermissions.ensureRecordAudio();
+  }
+
+  Future<void> _openActivePermissionSettings() {
+    return Platform.isIOS
+        ? _iosPermissions.openAppSettings()
+        : _androidPermissions.openAppSettings();
+  }
+
  void _onRecordAudioPermissionChanged() {
-    if (_androidPermissions.recordAudioState.value ==
+    if (_activeRecordAudioState.value ==
        AndroidRecordAudioPermissionState.granted) {
      unawaited(_clearPermissionHardMute());
    }
@@ -528,16 +611,16 @@ class _BetaHomeState extends State<_BetaHome> {
          final messenger = ScaffoldMessenger.of(context);
          if (began) {
            messenger.showSnackBar(
-              const SnackBar(
-                content: Text('Audio interrupted by system (phone call)'),
+              SnackBar(
+                content: Text(AppL10n.of(context).iosAudioInterrupted),
                duration: Duration(seconds: 3),
                backgroundColor: Colors.orange,
              ),
            );
          } else if (shouldResume) {
            messenger.showSnackBar(
-              const SnackBar(
-                content: Text('Audio resuming'),
+              SnackBar(
+                content: Text(AppL10n.of(context).iosAudioResuming),
                duration: Duration(seconds: 2),
                backgroundColor: Colors.green,
              ),
@@ -612,10 +695,14 @@ class _BetaHomeState extends State<_BetaHome> {
    _androidPermissions.recordAudioState.removeListener(
      _onRecordAudioPermissionChanged,
    );
+    _iosPermissions.recordAudioState.removeListener(
+      _onRecordAudioPermissionChanged,
+    );
    // SDD-106: detach the Kotlin -> Dart MethodChannel handler so a
    // late invokeMethod from the platform side cannot land on this
    // disposed state.
    _androidPermissions.stop();
+    _iosPermissions.stop();
    super.dispose();
  }

@@ -670,6 +757,14 @@ class _BetaHomeState extends State<_BetaHome> {
              : l10n.microphonePermissionBody,
        ),
        actions: [
+          if (Platform.isIOS && !isNetwork)
+            TextButton(
+              onPressed: () {
+                Navigator.pop(ctx);
+                unawaited(_openIosAppSettings());
+              },
+              child: Text(l10n.networkPermissionOpenSettings),
+            ),
          if (Platform.isMacOS)
            TextButton(
              onPressed: () {
@@ -691,6 +786,15 @@ class _BetaHomeState extends State<_BetaHome> {
    );
  }

+  Future<void> _openIosAppSettings() async {
+    try {
+      await _iosPlatformChannel.invokeMethod<bool>('openAppSettings');
+    } catch (_) {
+      // Best-effort affordance only; if iOS refuses the URL, the
+      // dialog still explained the missing microphone permission.
+    }
+  }
+
  // ignore: unused_element
  Future<void> _setPtt(bool active, {bool reportError = true}) async {
    try {
@@ -718,13 +822,9 @@ class _BetaHomeState extends State<_BetaHome> {
    final next = !_outputMuted;
    try {
      await rust.setOutputMuted(muted: next);
-      await rust.setHardMute(
-        muted: next || _inputMuted || _hardMuteByPermission,
-      );
      if (!mounted) return;
      setState(() {
        _outputMuted = next;
-        _hardMute = next || _inputMuted || _hardMuteByPermission;
      });
    } catch (e) {
      if (!mounted) return;
@@ -770,7 +870,11 @@ class _BetaHomeState extends State<_BetaHome> {
      // Trace: SDD-106 §1 (request timing), §2 (listen-only on denial),
      //        §3 (path to settings on permanent denial), §6
      //        (TransmitModeSelector clamp); SRS-209.
-      final permState = await _androidPermissions.ensureRecordAudio();
+      final permState = Platform.isAndroid
+          ? await _androidPermissions.ensureRecordAudio()
+          : Platform.isIOS
+          ? await _iosPermissions.ensureRecordAudio()
+          : AndroidRecordAudioPermissionState.granted;
      if (permState != AndroidRecordAudioPermissionState.granted) {
        // Listen-only: clamp hard-mute. The permission_state_banner
        // surfaces the path-to-grant; the user can re-attempt at any
@@ -800,6 +904,7 @@ class _BetaHomeState extends State<_BetaHome> {
          });
        }
      }
+      await _configureBundledVadModels();
      await rust.voiceJoin(channelId: ch.id, password: password ?? '');
      if (!mounted) return;
      unawaited(_onRefresh());
@@ -930,19 +1035,42 @@ class _BetaHomeState extends State<_BetaHome> {
  /// Narrow-mode voice controls modal sheet (Plan E status chip
  /// trigger). On mobile this is the **single** voice-controls
  /// surface: route picker + inline mode radio + inline release-tail
-  /// slider + level meter + stats + (desktop-only) capability badge.
-  /// Zero navigation depth \u2014 no nested dialog.
+  /// slider + level meter + stats + audio processing + (desktop-only)
+  /// capability badge. Zero navigation depth — no nested dialog.
  Future<void> _onOpenVoiceDetailsSheet() async {
+    // Load current audio processing config for the sheet.
+    rust.BridgeAudioProcessingConfig audioConfig;
+    try {
+      audioConfig = await rust.getAudioProcessingConfig();
+    } catch (_) {
+      audioConfig = const rust.BridgeAudioProcessingConfig(
+        route: rust.BridgeAudioRoute.unknown,
+        iosMode: rust.BridgeIosVoiceProcessingMode.platformVoiceProcessing,
+        processingBackend: rust.BridgeAudioBackend.platformVoiceProcessing,
+        vadBackend: rust.BridgeVadBackend.sileroOnnx,
+        aec: rust.BridgeEffectOwner.platform,
+        ns: rust.BridgeEffectOwner.platform,
+        agc: rust.BridgeEffectOwner.platform,
+        hpfEnabled: true,
+        limiterEnabled: true,
+        vadHangoverMs: 500,
+        vadPreRollMs: 160,
+        vadMinTxMs: 200,
+        debugWavDumpEnabled: false,
+      );
+    }
+    if (!mounted) return;
+
    await showVoiceDetailsSheet(
      context,
-      audioStats: _audioStats,
      transmitMode: _transmitMode,
      releaseTailMs: _releaseTailMs,
      pttBoundKeyLabel: _pttBoundKeyLabel,
      pttLevel: _pttLevel,
      pttBackendId: _pttBackendId,
      pttBoundInputClass: _pttBoundInputClass,
-      isTouchOnly: _isTouchOnlyPttHost,
+      isTouchOnly: isTouchOnlyPttHost,
+      initialAudioConfig: audioConfig,
      onModeChanged: (mode) async {
        try {
          await rust.setTransmitMode(mode: mode);
@@ -963,21 +1091,55 @@ class _BetaHomeState extends State<_BetaHome> {
          setState(() => _error = e.toString());
        }
      },
+      onAudioConfigChanged: (config) async {
+        try {
+          await rust.setAudioProcessingConfig(config: config);
+        } catch (e) {
+          if (!mounted) return;
+          setState(() => _error = e.toString());
+        }
+      },
    );
  }

  Future<void> _onOpenVoiceSettings() async {
+    // Load the current audio processing config before opening the dialog.
+    rust.BridgeAudioProcessingConfig audioConfig;
+    try {
+      audioConfig = await rust.getAudioProcessingConfig();
+    } catch (_) {
+      // If not connected yet, use a sensible default.
+      audioConfig = const rust.BridgeAudioProcessingConfig(
+        route: rust.BridgeAudioRoute.unknown,
+        iosMode: rust.BridgeIosVoiceProcessingMode.platformVoiceProcessing,
+        processingBackend: rust.BridgeAudioBackend.platformVoiceProcessing,
+        vadBackend: rust.BridgeVadBackend.sileroOnnx,
+        aec: rust.BridgeEffectOwner.platform,
+        ns: rust.BridgeEffectOwner.platform,
+        agc: rust.BridgeEffectOwner.platform,
+        hpfEnabled: true,
+        limiterEnabled: true,
+        vadHangoverMs: 500,
+        vadPreRollMs: 160,
+        vadMinTxMs: 200,
+        debugWavDumpEnabled: false,
+      );
+    }
+    if (!mounted) return;
+
    final result = await showDialog<VoiceSettingsResult>(
      context: context,
      builder: (ctx) => VoiceSettingsDialog(
        initialMode: _transmitMode,
        initialReleaseTailMs: _releaseTailMs,
+        initialAudioConfig: audioConfig,
      ),
    );
    if (result == null) return;
    try {
      await rust.setTransmitMode(mode: result.mode);
      await rust.setReleaseTailMs(ms: result.releaseTailMs);
+      await rust.setAudioProcessingConfig(config: result.audioConfig);
    } catch (e) {
      if (!mounted) return;
      setState(() => _error = e.toString());
@@ -1083,6 +1245,27 @@ class _BetaHomeState extends State<_BetaHome> {
          ),
        ),
        actions: [
+          TextButton(
+            onPressed: () async {
+              try {
+                final path = await _writeDiagnosticExport(text);
+                if (!ctx.mounted) return;
+                Navigator.of(ctx).pop();
+                if (!mounted) return;
+                ScaffoldMessenger.of(this.context).showSnackBar(
+                  SnackBar(content: Text(l10n.diagnosticsSaved(path))),
+                );
+              } catch (e) {
+                if (!ctx.mounted) return;
+                Navigator.of(ctx).pop();
+                if (!mounted) return;
+                ScaffoldMessenger.of(this.context).showSnackBar(
+                  SnackBar(content: Text(l10n.statusError(e.toString()))),
+                );
+              }
+            },
+            child: Text(l10n.diagnosticsSaveAction),
+          ),
          TextButton(
            onPressed: () async {
              await Clipboard.setData(ClipboardData(text: text));
@@ -1100,6 +1283,18 @@ class _BetaHomeState extends State<_BetaHome> {
    );
  }

+  Future<String> _writeDiagnosticExport(String text) async {
+    final dir = await getApplicationDocumentsDirectory();
+    final stamp = DateTime.now()
+        .toUtc()
+        .toIso8601String()
+        .replaceAll(':', '-')
+        .replaceAll('.', '-');
+    final file = File('${dir.path}/chanora-diagnostics-$stamp.txt');
+    await file.writeAsString(text, flush: true);
+    return file.path;
+  }
+
  Future<void> _onConfigurePtt(BuildContext context) async {
    // On the Linux GNOME-Wayland portal backend, the portal hosts
    // its own system-managed binding dialog (gen2 v0.9.3 / Q3a).
@@ -1399,26 +1594,33 @@ class _BetaHomeState extends State<_BetaHome> {
            const SizedBox(height: 12),
            if (_phase == _Phase.idle) ...[
              Expanded(
-                child: SingleChildScrollView(
-                  keyboardDismissBehavior:
-                      ScrollViewKeyboardDismissBehavior.onDrag,
-                  child: Column(
-                    crossAxisAlignment: CrossAxisAlignment.stretch,
-                    children: [
-                      _ConnectForm(
-                        hostCtl: _hostCtl,
-                        nickCtl: _nickCtl,
-                        passwordCtl: _passwordCtl,
-                        onConnect: () => _onConnect(),
-                        onAddBookmark: _onAddCurrentBookmark,
-                      ),
-                      const SizedBox(height: 16),
-                      _BookmarkList(
-                        bookmarks: _bookmarks,
-                        onConnect: _onUseBookmark,
-                        onDelete: _onDeleteBookmark,
-                      ),
-                    ],
+                child: AnimatedPadding(
+                  duration: const Duration(milliseconds: 180),
+                  curve: Curves.easeOut,
+                  padding: EdgeInsets.only(
+                    bottom: MediaQuery.viewInsetsOf(ctx).bottom,
+                  ),
+                  child: SingleChildScrollView(
+                    keyboardDismissBehavior:
+                        ScrollViewKeyboardDismissBehavior.onDrag,
+                    child: Column(
+                      crossAxisAlignment: CrossAxisAlignment.stretch,
+                      children: [
+                        _ConnectForm(
+                          hostCtl: _hostCtl,
+                          nickCtl: _nickCtl,
+                          passwordCtl: _passwordCtl,
+                          onConnect: () => _onConnect(),
+                          onAddBookmark: _onAddCurrentBookmark,
+                        ),
+                        const SizedBox(height: 16),
+                        _BookmarkList(
+                          bookmarks: _bookmarks,
+                          onConnect: _onUseBookmark,
+                          onDelete: _onDeleteBookmark,
+                        ),
+                      ],
+                    ),
                  ),
                ),
              ),
@@ -1450,11 +1652,14 @@ class _BetaHomeState extends State<_BetaHome> {
                      onConfigure: _onOpenVoiceSettings,
                      onPttHeldChanged: _onOnscreenPttHeldChanged,
                    );
-                    // SDD-106 §2/§3 + SRS-209: listen-only banner.
-                    // Self-hides on granted / unknown / non-Android.
-                    final permissionBanner = PermissionStateBanner(
-                      service: _androidPermissions,
-                    );
+                    // SDD-106 §2/§3 + SRS-209 + SRS-164: listen-only
+                    // banner. Self-hides on granted / unknown.
+                    final permissionBanner =
+                        PermissionStateBanner.fromCallbacks(
+                          recordAudioState: _activeRecordAudioState,
+                          ensureRecordAudio: _ensureActiveRecordAudio,
+                          openAppSettings: _openActivePermissionSettings,
+                        );
                    final snapshotView = _SnapshotView(
                      snapshot: _snapshot!,
                      audioStats: _audioStats,
@@ -1501,7 +1706,7 @@ class _BetaHomeState extends State<_BetaHome> {
                          releaseTailMs: _releaseTailMs,
                          pttBoundKeyLabel: _pttBoundKeyLabel,
                          audioStats: _audioStats,
-                          isTouchOnly: _isTouchOnlyPttHost,
+                          isTouchOnly: isTouchOnlyPttHost,
                          onTap: () => _onOpenVoiceDetailsSheet(),
                        ),
                        if (_inChannel &&
@@ -1552,7 +1757,10 @@ class _BetaHomeState extends State<_BetaHome> {

    return Scaffold(
      appBar: AppBar(title: headerTitle, actions: headerActions),
-      body: Padding(padding: const EdgeInsets.all(16), child: bodyContent),
+      body: SafeArea(
+        top: false,
+        child: Padding(padding: const EdgeInsets.all(16), child: bodyContent),
+      ),
    );
  }
 }
@@ -1961,146 +2169,6 @@ class _BookmarkList extends StatelessWidget {
 /// Driven by the `BridgeEvent::PttCapability` stream published by
 /// the `PttController` (SDD-088). The `_BetaHomeState` listener
 /// updates the props on each transition.
-class PttCapabilityBadge extends StatelessWidget {
-  /// Construct a badge.
-  const PttCapabilityBadge({
-    super.key,
-    required this.level,
-    required this.backendId,
-    required this.boundInputClass,
-  });
-
-  /// Resolved capability level as the bridge emits it
-  /// (`L0Focused` / `L1WindowsHook` / `L2WindowsRawInput` /
-  /// `L1MacOSEventTap` / `L1LinuxGnomeWaylandPortal`).
-  final String level;
-
-  /// Stable backend identifier (`focused`, `windows-raw-input`, …).
-  final String backendId;
-
-  /// Privacy-safe input class (`keyboard`, `mouse-side-button`,
-  /// or empty when no binding is set).
-  final String boundInputClass;
-
-  bool get _isFocused => level == 'L0Focused';
-
-  String _explainBodyForPlatform(AppL10n l10n) {
-    // Use `defaultTargetPlatform` rather than `Theme.of(context).platform`
-    // because the latter is influenced by debug platform overrides
-    // that callers may toggle in dev mode. We want the badge's
-    // explanation to match the actual host OS.
-    switch (defaultTargetPlatform) {
-      case TargetPlatform.windows:
-        return l10n.pttCapabilityExplainGoGlobalWindows;
-      case TargetPlatform.macOS:
-        return l10n.pttCapabilityExplainGoGlobalMacos;
-      case TargetPlatform.linux:
-        return l10n.pttCapabilityExplainGoGlobalLinux;
-      case TargetPlatform.iOS:
-        return l10n.pttCapabilityExplainGoGlobalIos;
-      default:
-        return l10n.pttCapabilityExplainGoGlobalGeneric;
-    }
-  }
-
-  void _openExplanationSheet(BuildContext context) {
-    final l10n = AppL10n.of(context);
-    showModalBottomSheet<void>(
-      context: context,
-      showDragHandle: true,
-      builder: (sheetContext) {
-        final theme = Theme.of(sheetContext);
-        return SafeArea(
-          child: Padding(
-            padding: const EdgeInsets.fromLTRB(20, 4, 20, 24),
-            child: Column(
-              mainAxisSize: MainAxisSize.min,
-              crossAxisAlignment: CrossAxisAlignment.start,
-              children: [
-                Text(
-                  l10n.pttCapabilityExplainTitle,
-                  style: theme.textTheme.titleMedium,
-                ),
-                const SizedBox(height: 12),
-                Text(
-                  l10n.pttCapabilityExplainFocusedHeading,
-                  style: theme.textTheme.titleSmall,
-                ),
-                const SizedBox(height: 4),
-                Text(
-                  l10n.pttCapabilityExplainFocusedBody,
-                  style: theme.textTheme.bodyMedium,
-                ),
-                const SizedBox(height: 16),
-                Text(
-                  _explainBodyForPlatform(l10n),
-                  style: theme.textTheme.bodyMedium,
-                ),
-                const SizedBox(height: 16),
-                Align(
-                  alignment: AlignmentDirectional.centerEnd,
-                  child: TextButton(
-                    onPressed: () => Navigator.of(sheetContext).pop(),
-                    child: Text(l10n.closeAction),
-                  ),
-                ),
-              ],
-            ),
-          ),
-        );
-      },
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final l10n = AppL10n.of(context);
-    final theme = Theme.of(context);
-    final badgeLabel = l10n.pttCapabilityBadge(level, backendId);
-    final tooltipMessage = boundInputClass.isEmpty
-        ? badgeLabel
-        : '$badgeLabel\n($boundInputClass)';
-    return Padding(
-      padding: const EdgeInsets.only(bottom: 6),
-      child: Tooltip(
-        message: tooltipMessage,
-        child: Row(
-          children: [
-            Icon(
-              _isFocused ? Icons.crop_free : Icons.public,
-              size: 14,
-              color: theme.colorScheme.onSurfaceVariant,
-            ),
-            const SizedBox(width: 4),
-            Expanded(
-              child: Text(
-                badgeLabel,
-                style: theme.textTheme.bodySmall?.copyWith(
-                  color: theme.colorScheme.onSurfaceVariant,
-                ),
-              ),
-            ),
-            // Info icon only for L0Focused — the explanation sheet
-            // tells the user why their PTT may not work outside the
-            // app window and how to grant the permission. There is
-            // intentionally NO 'Configure' button here: the single
-            // configuration entry point is the Voice Bar's
-            // settings gear (onConfigure on `VoiceBar`). Having two
-            // identical bind-key entry points just confuses users.
-            if (_isFocused)
-              IconButton(
-                icon: const Icon(Icons.info_outline, size: 16),
-                tooltip: l10n.pttCapabilityExplainTitle,
-                visualDensity: VisualDensity.compact,
-                onPressed: () => _openExplanationSheet(context),
-              ),
-          ],
-        ),
-      ),
-    );
-  }
-}
-
 class _SnapshotView extends StatelessWidget {
  const _SnapshotView({
    required this.snapshot,