feat: on device speech to text

ios/Podfile.lock

@@ -1,4 +1,7 @@
 PODS:
+  - CwlCatchException (2.2.1):
+    - CwlCatchExceptionSupport (~> 2.2.1)
+  - CwlCatchExceptionSupport (2.2.1)
   - DKImagePickerController/Core (4.3.9):
     - DKImagePickerController/ImageDataManager
     - DKImagePickerController/Resource
@@ -55,6 +58,10 @@ PODS:
   - shared_preferences_foundation (0.0.1):
     - Flutter
     - FlutterMacOS
+  - speech_to_text (7.2.0):
+    - CwlCatchException
+    - Flutter
+    - FlutterMacOS
   - sqflite_darwin (0.0.4):
     - Flutter
     - FlutterMacOS
@@ -75,12 +82,15 @@ DEPENDENCIES:
   - record_ios (from `.symlinks/plugins/record_ios/ios`)
   - share_plus (from `.symlinks/plugins/share_plus/ios`)
   - shared_preferences_foundation (from `.symlinks/plugins/shared_preferences_foundation/darwin`)
+  - speech_to_text (from `.symlinks/plugins/speech_to_text/darwin`)
   - sqflite_darwin (from `.symlinks/plugins/sqflite_darwin/darwin`)
   - url_launcher_ios (from `.symlinks/plugins/url_launcher_ios/ios`)
   - wakelock_plus (from `.symlinks/plugins/wakelock_plus/ios`)
 
 SPEC REPOS:
   trunk:
+    - CwlCatchException
+    - CwlCatchExceptionSupport
     - DKImagePickerController
     - DKPhotoGallery
     - SDWebImage
@@ -107,6 +117,8 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/share_plus/ios"
   shared_preferences_foundation:
     :path: ".symlinks/plugins/shared_preferences_foundation/darwin"
+  speech_to_text:
+    :path: ".symlinks/plugins/speech_to_text/darwin"
   sqflite_darwin:
     :path: ".symlinks/plugins/sqflite_darwin/darwin"
   url_launcher_ios:
@@ -115,6 +127,8 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/wakelock_plus/ios"
 
 SPEC CHECKSUMS:
+  CwlCatchException: 7acc161b299a6de7f0a46a6ed741eae2c8b4d75a
+  CwlCatchExceptionSupport: 54ccab8d8c78907b57f99717fb19d4cc3bce02dc
   DKImagePickerController: 946cec48c7873164274ecc4624d19e3da4c1ef3c
   DKPhotoGallery: b3834fecb755ee09a593d7c9e389d8b5d6deed60
   file_picker: a0560bc09d61de87f12d246fc47d2119e6ef37be
@@ -128,6 +142,7 @@ SPEC CHECKSUMS:
   SDWebImage: f29024626962457f3470184232766516dee8dfea
   share_plus: 50da8cb520a8f0f65671c6c6a99b3617ed10a58a
   shared_preferences_foundation: 9e1978ff2562383bd5676f64ec4e9aa8fa06a6f7
+  speech_to_text: 3b313d98516d3d0406cea424782ec25470c59d19
   sqflite_darwin: 20b2a3a3b70e43edae938624ce550a3cbf66a3d0
   SwiftyGif: 706c60cf65fa2bc5ee0313beece843c8eb8194d4
   url_launcher_ios: 694010445543906933d732453a59da0a173ae33d

ios/Runner/Info.plist

@@ -54,6 +54,8 @@
 		<!-- Permissions -->
 		<key>NSMicrophoneUsageDescription</key>
 		<string>Conduit uses the microphone to record voice messages and enable voice-to-text in chats. For example, when you hold the mic button in a conversation, we capture your speech to send as an audio message or transcript.</string>
+		<key>NSSpeechRecognitionUsageDescription</key>
+		<string>Conduit uses on-device speech recognition so you can dictate messages hands‑free. Your speech is converted to text on your device when available.</string>
 		<key>NSCameraUsageDescription</key>
 		<string>Conduit uses the camera to take photos or videos you choose to share in chats. For example, you can snap a photo of a document and attach it to a message.</string>
 		<key>NSPhotoLibraryUsageDescription</key>

lib/core/services/settings_service.dart

@@ -12,6 +12,10 @@ class SettingsService {
   static const String _largeTextKey = 'large_text';
   static const String _darkModeKey = 'dark_mode';
   static const String _defaultModelKey = 'default_model';
+  // Voice input settings
+  static const String _voiceLocaleKey = 'voice_locale_id';
+  static const String _voiceHoldToTalkKey = 'voice_hold_to_talk';
+  static const String _voiceAutoSendKey = 'voice_auto_send_final';
 
   /// Get reduced motion preference
   static Future<bool> getReduceMotion() async {
@@ -111,6 +115,9 @@ class SettingsService {
       largeText: await getLargeText(),
       darkMode: await getDarkMode(),
       defaultModel: await getDefaultModel(),
+      voiceLocaleId: await getVoiceLocaleId(),
+      voiceHoldToTalk: await getVoiceHoldToTalk(),
+      voiceAutoSendFinal: await getVoiceAutoSendFinal(),
     );
   }
 
@@ -124,9 +131,47 @@ class SettingsService {
       setLargeText(settings.largeText),
       setDarkMode(settings.darkMode),
       setDefaultModel(settings.defaultModel),
+      setVoiceLocaleId(settings.voiceLocaleId),
+      setVoiceHoldToTalk(settings.voiceHoldToTalk),
+      setVoiceAutoSendFinal(settings.voiceAutoSendFinal),
     ]);
   }
 
+  // Voice input specific settings
+  static Future<String?> getVoiceLocaleId() async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.getString(_voiceLocaleKey);
+  }
+
+  static Future<void> setVoiceLocaleId(String? localeId) async {
+    final prefs = await SharedPreferences.getInstance();
+    if (localeId == null || localeId.isEmpty) {
+      await prefs.remove(_voiceLocaleKey);
+    } else {
+      await prefs.setString(_voiceLocaleKey, localeId);
+    }
+  }
+
+  static Future<bool> getVoiceHoldToTalk() async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.getBool(_voiceHoldToTalkKey) ?? false;
+  }
+
+  static Future<void> setVoiceHoldToTalk(bool value) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_voiceHoldToTalkKey, value);
+  }
+
+  static Future<bool> getVoiceAutoSendFinal() async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.getBool(_voiceAutoSendKey) ?? false;
+  }
+
+  static Future<void> setVoiceAutoSendFinal(bool value) async {
+    final prefs = await SharedPreferences.getInstance();
+    await prefs.setBool(_voiceAutoSendKey, value);
+  }
+
   /// Get effective animation duration considering all settings
   static Duration getEffectiveAnimationDuration(
     BuildContext context,
@@ -176,6 +221,9 @@ class AppSettings {
   final bool largeText;
   final bool darkMode;
   final String? defaultModel;
+  final String? voiceLocaleId;
+  final bool voiceHoldToTalk;
+  final bool voiceAutoSendFinal;
 
   const AppSettings({
     this.reduceMotion = false,
@@ -185,6 +233,9 @@ class AppSettings {
     this.largeText = false,
     this.darkMode = true,
     this.defaultModel,
+    this.voiceLocaleId,
+    this.voiceHoldToTalk = false,
+    this.voiceAutoSendFinal = false,
   });
 
   AppSettings copyWith({
@@ -195,6 +246,9 @@ class AppSettings {
     bool? largeText,
     bool? darkMode,
     Object? defaultModel = const _DefaultValue(),
+    Object? voiceLocaleId = const _DefaultValue(),
+    bool? voiceHoldToTalk,
+    bool? voiceAutoSendFinal,
   }) {
     return AppSettings(
       reduceMotion: reduceMotion ?? this.reduceMotion,
@@ -204,6 +258,9 @@ class AppSettings {
       largeText: largeText ?? this.largeText,
       darkMode: darkMode ?? this.darkMode,
       defaultModel: defaultModel is _DefaultValue ? this.defaultModel : defaultModel as String?,
+      voiceLocaleId: voiceLocaleId is _DefaultValue ? this.voiceLocaleId : voiceLocaleId as String?,
+      voiceHoldToTalk: voiceHoldToTalk ?? this.voiceHoldToTalk,
+      voiceAutoSendFinal: voiceAutoSendFinal ?? this.voiceAutoSendFinal,
     );
   }
 
@@ -217,7 +274,10 @@ class AppSettings {
         other.highContrast == highContrast &&
         other.largeText == largeText &&
         other.darkMode == darkMode &&
-        other.defaultModel == defaultModel;
+        other.defaultModel == defaultModel &&
+        other.voiceLocaleId == voiceLocaleId &&
+        other.voiceHoldToTalk == voiceHoldToTalk &&
+        other.voiceAutoSendFinal == voiceAutoSendFinal;
   }
 
   @override
@@ -230,6 +290,9 @@ class AppSettings {
       largeText,
       darkMode,
       defaultModel,
+      voiceLocaleId,
+      voiceHoldToTalk,
+      voiceAutoSendFinal,
     );
   }
 }
@@ -285,6 +348,21 @@ class AppSettingsNotifier extends StateNotifier<AppSettings> {
     await SettingsService.setDefaultModel(modelId);
   }
 
+  Future<void> setVoiceLocaleId(String? localeId) async {
+    state = state.copyWith(voiceLocaleId: localeId);
+    await SettingsService.setVoiceLocaleId(localeId);
+  }
+
+  Future<void> setVoiceHoldToTalk(bool value) async {
+    state = state.copyWith(voiceHoldToTalk: value);
+    await SettingsService.setVoiceHoldToTalk(value);
+  }
+
+  Future<void> setVoiceAutoSendFinal(bool value) async {
+    state = state.copyWith(voiceAutoSendFinal: value);
+    await SettingsService.setVoiceAutoSendFinal(value);
+  }
+
   Future<void> resetToDefaults() async {
     const defaultSettings = AppSettings();
     await SettingsService.saveSettings(defaultSettings);

lib/features/chat/services/voice_input_service.dart

@@ -1,14 +1,22 @@
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:record/record.dart';
+import 'package:flutter/widgets.dart';
 import 'dart:async';
 import 'dart:io' show Platform;
 import 'package:path_provider/path_provider.dart';
 import 'package:path/path.dart' as p;
+import 'package:speech_to_text/speech_recognition_error.dart';
+import 'package:speech_to_text/speech_recognition_result.dart';
+import 'package:speech_to_text/speech_to_text.dart' as stt;
 
 class VoiceInputService {
   final AudioRecorder _recorder = AudioRecorder();
+  stt.SpeechToText? _speech;
   bool _isInitialized = false;
   bool _isListening = false;
+  bool _localSttAvailable = false;
+  String? _selectedLocaleId;
+  List<stt.LocaleName> _locales = const [];
   StreamController<String>? _textStreamController;
   String _currentText = '';
   // Public stream for UI waveform visualization (emits partial text length as proxy)
@@ -23,16 +31,46 @@ class VoiceInputService {
   Future<bool> initialize() async {
     if (_isInitialized) return true;
     if (!isSupportedPlatform) return false;
-    // Log platform for diagnostics
+    // Prepare local speech recognizer
-    // ignore: avoid_print
+    try {
-    print(
+      _speech = stt.SpeechToText();
-      'DEBUG: VoiceInputService initialize on platform: '
+      _localSttAvailable = await _speech!.initialize(
-      '${Platform.isAndroid
+        onStatus: (status) {
-          ? 'Android'
+          // When platform end-of-speech triggers, ensure we stop timer/streams
-          : Platform.isIOS
+          if (status.toLowerCase().contains('notListening') ||
-          ? 'iOS'
+              status.toLowerCase().contains('done')) {
-          : 'Other'}',
+            // No-op: UI manages stopping; SpeechToText emits final result
-    );
+          }
+        },
+        onError: (SpeechRecognitionError error) {
+          // If any error, we keep fallback available; no throws here.
+        },
+      );
+      if (_localSttAvailable) {
+        try {
+          _locales = await _speech!.locales();
+          final deviceTag = WidgetsBinding.instance.platformDispatcher.locale
+              .toLanguageTag();
+          final match = _locales.firstWhere(
+            (l) => l.localeId.toLowerCase() == deviceTag.toLowerCase(),
+            orElse: () {
+              final primary = deviceTag.split(RegExp('[-_]')).first.toLowerCase();
+              return _locales.firstWhere(
+                (l) => l.localeId.toLowerCase().startsWith('$primary-'),
+                orElse: () => _locales.isNotEmpty
+                    ? _locales.first
+                    : stt.LocaleName('en_US', 'English (US)'),
+              );
+            },
+          );
+          _selectedLocaleId = match.localeId;
+        } catch (_) {
+          _selectedLocaleId = null;
+        }
+      }
+    } catch (_) {
+      _localSttAvailable = false;
+    }
     _isInitialized = true;
     return true;
   }
@@ -46,10 +84,16 @@ class VoiceInputService {
   }
 
   bool get isListening => _isListening;
-  bool get isAvailable => _isInitialized;
+  bool get isAvailable => _isInitialized; // service usable (local or fallback)
+  bool get hasLocalStt => _localSttAvailable;
+  String? get selectedLocaleId => _selectedLocaleId;
+  List<stt.LocaleName> get locales => _locales;
+
+  void setLocale(String? localeId) {
+    _selectedLocaleId = localeId;
+  }
 
   Stream<String> startListening() {
-    // Ensure initialized; we allow initialize to pass even if native STT unavailable
     if (!_isInitialized) {
       throw Exception('Voice input not initialized');
     }
@@ -61,21 +105,52 @@ class VoiceInputService {
     _textStreamController = StreamController<String>.broadcast();
     _currentText = '';
     _isListening = true;
-
     _intensityController = StreamController<int>.broadcast();
 
-    // Start recording raw audio; UI or auto-timer will stop and trigger transcription via API
+    if (_localSttAvailable && _speech != null) {
-    // ignore: avoid_print
+      // Local on-device STT path
-    print('DEBUG: VoiceInputService startListening');
+      _autoStopTimer?.cancel();
-    _startRecordingProxyIntensity();
+      // SpeechToText has its own end-of-speech handling; we still cap at 60s
+      _autoStopTimer = Timer(const Duration(seconds: 60), () {
+        if (_isListening) {
+          _stopListening();
+        }
+      });
 
-    // Auto-stop after 30 seconds similar to native STT behavior
+      _speech!.listen(
-    _autoStopTimer?.cancel();
+        localeId: _selectedLocaleId,
-    _autoStopTimer = Timer(const Duration(seconds: 30), () {
+        listenFor: const Duration(seconds: 60),
-      if (_isListening) {
+        pauseFor: const Duration(seconds: 5),
-        _stopListening();
+        onResult: (SpeechRecognitionResult result) {
-      }
+          if (!_isListening) return;
-    });
+          _currentText = result.recognizedWords;
+          _textStreamController?.add(_currentText);
+          if (result.finalResult) {
+            // Will be followed by notListening status; we proactively close
+            _stopListening();
+          }
+        },
+        onSoundLevelChange: (level) {
+          // level is roughly 0..1+; map to 0..10
+          final scaled = (level * 10).clamp(0, 10).round();
+          _intensityController?.add(scaled);
+        },
+        listenOptions: stt.SpeechListenOptions(
+          partialResults: true,
+          cancelOnError: true,
+          listenMode: stt.ListenMode.confirmation,
+        ),
+      );
+    } else {
+      // Fallback: record audio and signal file path for server transcription
+      _startRecordingProxyIntensity();
+      _autoStopTimer?.cancel();
+      _autoStopTimer = Timer(const Duration(seconds: 30), () {
+        if (_isListening) {
+          _stopListening();
+        }
+      });
+    }
 
     return _textStreamController!.stream;
   }
@@ -88,10 +163,14 @@ class VoiceInputService {
     if (!_isListening) return;
 
     _isListening = false;
-    // Also stop recorder if active
+    if (_localSttAvailable && _speech != null) {
-    await _stopRecording();
+      try {
-    // ignore: avoid_print
+        await _speech!.stop();
-    print('DEBUG: VoiceInputService stopped listening');
+      } catch (_) {}
+    } else {
+      // Also stop recorder if active
+      await _stopRecording();
+    }
 
     _autoStopTimer?.cancel();
     _autoStopTimer = null;
@@ -111,6 +190,9 @@ class VoiceInputService {
   void dispose() {
     stopListening();
     _stopRecording(force: true);
+    try {
+      _speech?.cancel();
+    } catch (_) {}
   }
 
   // --- Recording and intensity proxy for server transcription path ---
@@ -138,8 +220,7 @@ class VoiceInputService {
         ),
         path: filePath,
       );
-      // ignore: avoid_print
+      // recording started at filePath
-      print('DEBUG: VoiceInputService recording started at: $filePath');
 
       // Drive intensity from amplitude stream and detect silence
       // Consider amplitude less than threshold as silence; stop after ~3s of continuous silence
@@ -167,8 +248,6 @@ class VoiceInputService {
             }
           });
     } catch (e) {
-      // ignore: avoid_print
-      print('DEBUG: VoiceInputService recording failed: $e');
       _textStreamController?.addError('Audio recording failed: $e');
       _stopListening();
     }
@@ -182,8 +261,6 @@ class VoiceInputService {
         _textStreamController?.addError('Recording failed: no file path');
         return;
       }
-      // ignore: avoid_print
-      print('DEBUG: VoiceInputService recording saved: $path');
       // Hand off recorded file path to listeners as a special token; UI layer will upload for transcription
       _textStreamController?.add('[[AUDIO_FILE_PATH]]:$path');
     } catch (e) {
@@ -203,6 +280,8 @@ final voiceInputAvailableProvider = FutureProvider<bool>((ref) async {
   if (!service.isSupportedPlatform) return false;
   final initialized = await service.initialize();
   if (!initialized) return false;
+  // If local STT exists, we consider it available; otherwise ensure mic permission for fallback
+  if (service.hasLocalStt) return true;
   final hasPermission = await service.checkPermissions();
   if (!hasPermission) return false;
   return service.isAvailable;

lib/features/chat/views/chat_page.dart

@@ -29,6 +29,10 @@ import 'chat_page_helpers.dart';
 import '../../../shared/widgets/themed_dialogs.dart';
 import '../../onboarding/views/onboarding_sheet.dart';
 import '../../../shared/widgets/sheet_handle.dart';
+import '../../../shared/widgets/conduit_components.dart';
+import '../../../core/services/settings_service.dart';
+// Removed unused PlatformUtils import
+import '../../../core/services/platform_service.dart' as ps;
 
 class ChatPage extends ConsumerStatefulWidget {
   const ChatPage({super.key});
@@ -1791,20 +1795,35 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
   Timer? _elapsedTimer;
   bool _isTranscribing = false;
   String _languageTag = 'en';
+  bool _holdToTalk = false;
+  bool _autoSendFinal = false;
 
   @override
   void initState() {
     super.initState();
     _voiceService = ref.read(voiceInputServiceProvider);
     try {
-      _languageTag = WidgetsBinding.instance.platformDispatcher.locale
+      final preset = _voiceService.selectedLocaleId;
-          .toLanguageTag()
+      if (preset != null && preset.isNotEmpty) {
-          .split(RegExp('[-_]'))
+        _languageTag = preset.split(RegExp('[-_]')).first.toLowerCase();
-          .first
+      } else {
-          .toLowerCase();
+        _languageTag = WidgetsBinding.instance.platformDispatcher.locale
+            .toLanguageTag()
+            .split(RegExp('[-_]'))
+            .first
+            .toLowerCase();
+      }
     } catch (_) {
       _languageTag = 'en';
     }
+    // Load voice settings from app settings
+    final settings = ref.read(appSettingsProvider);
+    _holdToTalk = settings.voiceHoldToTalk;
+    _autoSendFinal = settings.voiceAutoSendFinal;
+    if (settings.voiceLocaleId != null && settings.voiceLocaleId!.isNotEmpty) {
+      _voiceService.setLocale(settings.voiceLocaleId);
+      _languageTag = settings.voiceLocaleId!.split(RegExp('[-_]')).first.toLowerCase();
+    }
   }
 
   void _startListening() async {
@@ -1813,12 +1832,23 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
       _recognizedText = '';
       _elapsedSeconds = 0;
     });
+    // Haptic: indicate start listening
+    final hapticEnabled = ref.read(hapticEnabledProvider);
+    ps.PlatformService.hapticFeedbackWithSettings(
+      type: ps.HapticType.medium,
+      hapticEnabled: hapticEnabled,
+    );
 
     try {
-      // Ensure service is initialized and has permission
+      // Ensure service is initialized (local STT will request permissions itself)
       final ok = await _voiceService.initialize();
-      if (!ok || !await _voiceService.checkPermissions()) {
+      if (!ok) {
-        throw Exception('Microphone permission not granted');
+        throw Exception('Voice service unavailable');
+      }
+      // Only check mic permission when falling back to recording
+      if (!_voiceService.hasLocalStt) {
+        final mic = await _voiceService.checkPermissions();
+        if (!mic) throw Exception('Microphone permission not granted');
       }
 
       // Start elapsed timer for UX
@@ -1838,7 +1868,7 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
       });
       _textSub = stream.listen(
         (text) {
-          // If we receive a special token with recorded audio path, transcribe it via API
+          // If we receive a special token with recorded audio path, transcribe it via API (fallback)
           if (text.startsWith('[[AUDIO_FILE_PATH]]:')) {
             final filePath = text.split(':').skip(1).join(':');
             debugPrint(
@@ -1857,6 +1887,10 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
             _isListening = false;
           });
           _elapsedTimer?.cancel();
+          // Auto-send on final local result if enabled
+          if (_autoSendFinal && _recognizedText.trim().isNotEmpty) {
+            _sendText();
+          }
         },
         onError: (error) {
           debugPrint('DEBUG: VoiceInputSheet stream error: $error');
@@ -1864,7 +1898,13 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
             _isListening = false;
           });
           _elapsedTimer?.cancel();
-          if (mounted) {}
+          if (mounted) {
+            final hapticEnabled = ref.read(hapticEnabledProvider);
+            ps.PlatformService.hapticFeedbackWithSettings(
+              type: ps.HapticType.warning,
+              hapticEnabled: hapticEnabled,
+            );
+          }
         },
       );
     } catch (e) {
@@ -1903,6 +1943,9 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
       });
       // Stop listening state if we have a result
       setState(() => _isListening = false);
+      if (_autoSendFinal && _recognizedText.trim().isNotEmpty) {
+        _sendText();
+      }
     } catch (e) {
       if (!mounted) return;
       setState(() => _isListening = false);
@@ -1922,10 +1965,22 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
         _isListening = false;
       });
     }
+    // Haptic: subtle stop confirmation
+    final hapticEnabled = ref.read(hapticEnabledProvider);
+    ps.PlatformService.hapticFeedbackWithSettings(
+      type: ps.HapticType.selection,
+      hapticEnabled: hapticEnabled,
+    );
   }
 
   void _sendText() {
     if (_recognizedText.isNotEmpty) {
+      // Haptic: success send
+      final hapticEnabled = ref.read(hapticEnabledProvider);
+      ps.PlatformService.hapticFeedbackWithSettings(
+        type: ps.HapticType.success,
+        hapticEnabled: hapticEnabled,
+      );
       widget.onTextReceived(_recognizedText);
       Navigator.pop(context);
     }
@@ -1937,9 +1992,103 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
     return '$m:$s';
   }
 
-  void _cancel() {
+  void _pickLanguage() async {
-    _stopListening();
+    // Only for local STT
-    Navigator.pop(context);
+    if (!_voiceService.hasLocalStt) return;
+    final locales = _voiceService.locales;
+    if (locales.isEmpty) return;
+    if (!mounted) return;
+    final selected = await showModalBottomSheet<String>(
+      context: context,
+      backgroundColor: Colors.transparent,
+      builder: (context) {
+        return Container(
+          decoration: BoxDecoration(
+            color: context.conduitTheme.surfaceBackground,
+            borderRadius: const BorderRadius.vertical(
+              top: Radius.circular(AppBorderRadius.bottomSheet),
+            ),
+            border: Border.all(
+              color: context.conduitTheme.dividerColor,
+              width: BorderWidth.regular,
+            ),
+            boxShadow: ConduitShadows.modal,
+          ),
+          padding: const EdgeInsets.all(Spacing.bottomSheetPadding),
+          child: SafeArea(
+            top: false,
+            child: Column(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                const SheetHandle(),
+                const SizedBox(height: Spacing.md),
+                Text('Select Language',
+                    style: TextStyle(
+                      fontSize: AppTypography.headlineSmall,
+                      color: context.conduitTheme.textPrimary,
+                      fontWeight: FontWeight.w600,
+                    )),
+                const SizedBox(height: Spacing.sm),
+                Flexible(
+                  child: ListView.separated(
+                    shrinkWrap: true,
+                    itemCount: locales.length,
+                    separatorBuilder: (_, sep) => Divider(
+                      height: 1,
+                      color: context.conduitTheme.dividerColor,
+                    ),
+                    itemBuilder: (ctx, i) {
+                      final l = locales[i];
+                      final isSelected = l.localeId == _voiceService.selectedLocaleId;
+                      return ListTile(
+                        title: Text(
+                          l.name,
+                          style: TextStyle(color: context.conduitTheme.textPrimary),
+                        ),
+                        subtitle: Text(
+                          l.localeId,
+                          style: TextStyle(color: context.conduitTheme.textSecondary),
+                        ),
+                        trailing: isSelected
+                            ? Icon(Icons.check, color: context.conduitTheme.buttonPrimary)
+                            : null,
+                        onTap: () => Navigator.pop(ctx, l.localeId),
+                      );
+                    },
+                  ),
+                ),
+              ],
+            ),
+          ),
+        );
+      },
+    );
+
+    if (selected != null && mounted) {
+      setState(() {
+        _voiceService.setLocale(selected);
+        _languageTag = selected.split(RegExp('[-_]')).first.toLowerCase();
+      });
+      // Persist preferred locale
+      await ref.read(appSettingsProvider.notifier).setVoiceLocaleId(selected);
+      if (_isListening) {
+        // Restart listening to apply new language
+        await _voiceService.stopListening();
+        _startListening();
+      }
+    }
+  }
+
+  Widget _buildThemedSwitch({
+    required bool value,
+    required ValueChanged<bool> onChanged,
+  }) {
+    final theme = context.conduitTheme;
+    return ps.PlatformService.getPlatformSwitch(
+      value: value,
+      onChanged: onChanged,
+      activeColor: theme.buttonPrimary,
+    );
   }
 
   @override
@@ -1951,40 +2100,40 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
 
   @override
   Widget build(BuildContext context) {
+    final media = MediaQuery.of(context);
+    final isCompact = media.size.height < 680;
     return Container(
-      height: MediaQuery.of(context).size.height * 0.6,
+      height: media.size.height * (isCompact ? 0.45 : 0.6),
       decoration: BoxDecoration(
         color: context.conduitTheme.surfaceBackground,
         borderRadius: const BorderRadius.vertical(
-          top: Radius.circular(AppBorderRadius.lg),
+          top: Radius.circular(AppBorderRadius.bottomSheet),
         ),
         border: Border.all(color: context.conduitTheme.dividerColor, width: 1),
+        boxShadow: ConduitShadows.modal,
       ),
-      child: Column(
+      child: SafeArea(
+        top: false,
+        bottom: true,
+        child: Padding(
+          padding: const EdgeInsets.all(Spacing.bottomSheetPadding),
+          child: Column(
         children: [
           // Handle bar
-          Container(
+          const SheetHandle(),
-            margin: const EdgeInsets.only(top: Spacing.sm),
-            width: 40,
-            height: 4,
-            decoration: BoxDecoration(
-              color: context.conduitTheme.dividerColor,
-              borderRadius: BorderRadius.circular(AppBorderRadius.xs),
-            ),
-          ),
 
           // Header: Title + timer + language chip
-          Padding(
+              Padding(
-            padding: const EdgeInsets.all(Spacing.lg),
+                padding: const EdgeInsets.only(top: Spacing.md, bottom: Spacing.md),
-            child: Row(
+                child: Row(
-              mainAxisAlignment: MainAxisAlignment.spaceBetween,
+                  mainAxisAlignment: MainAxisAlignment.spaceBetween,
-              children: [
+                  children: [
-                Text(
+                    Text(
-                  _isListening
+                  _isTranscribing
-                      ? 'Listening\u2026'
+                      ? 'Transcribing…'
-                      : _isTranscribing
+                      : _isListening
-                      ? 'Transcribing\u2026'
+                          ? (_voiceService.hasLocalStt ? 'Listening…' : 'Recording…')
-                      : 'Voice',
+                          : 'Voice',
                   style: TextStyle(
                     fontSize: AppTypography.headlineMedium,
                     fontWeight: FontWeight.w600,
@@ -1994,28 +2143,43 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
                 Row(
                   children: [
                     // Language chip
-                    Container(
+                    GestureDetector(
-                      padding: const EdgeInsets.symmetric(
+                      onTap: _voiceService.hasLocalStt ? _pickLanguage : null,
-                        horizontal: Spacing.xs,
+                      child: Container(
-                        vertical: 4,
+                        padding: const EdgeInsets.symmetric(
-                      ),
+                          horizontal: Spacing.xs,
-                      decoration: BoxDecoration(
+                          vertical: 4,
-                        color: context.conduitTheme.surfaceBackground
-                            .withValues(alpha: 0.4),
-                        borderRadius: BorderRadius.circular(
-                          AppBorderRadius.badge,
                         ),
-                        border: Border.all(
+                        decoration: BoxDecoration(
-                          color: context.conduitTheme.dividerColor,
+                          color: context.conduitTheme.surfaceBackground
-                          width: BorderWidth.thin,
+                              .withValues(alpha: 0.4),
+                          borderRadius: BorderRadius.circular(
+                            AppBorderRadius.badge,
+                          ),
+                          border: Border.all(
+                            color: context.conduitTheme.dividerColor,
+                            width: BorderWidth.thin,
+                          ),
                         ),
-                      ),
+                        child: Row(
-                      child: Text(
+                          children: [
-                        _languageTag.toUpperCase(),
+                            Text(
-                        style: TextStyle(
+                              _languageTag.toUpperCase(),
-                          fontSize: AppTypography.labelSmall,
+                              style: TextStyle(
-                          color: context.conduitTheme.textSecondary,
+                                fontSize: AppTypography.labelSmall,
-                          fontWeight: FontWeight.w600,
+                                color: context.conduitTheme.textSecondary,
+                                fontWeight: FontWeight.w600,
+                              ),
+                            ),
+                            if (_voiceService.hasLocalStt) ...[
+                              const SizedBox(width: 4),
+                              Icon(
+                                Icons.arrow_drop_down,
+                                size: 16,
+                                color: context.conduitTheme.iconSecondary,
+                              ),
+                            ],
+                          ],
                         ),
                       ),
                     ),
@@ -2032,25 +2196,108 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
                         ),
                       ),
                     ),
+                    const SizedBox(width: Spacing.sm),
+                    // Close sheet
+                    ConduitIconButton(
+                      icon: Platform.isIOS ? CupertinoIcons.xmark : Icons.close,
+                      tooltip: 'Close',
+                      isCompact: true,
+                      onPressed: () => Navigator.of(context).pop(),
+                    ),
                   ],
                 ),
               ],
             ),
           ),
 
-          // Microphone animation and waveform
+          // Toggles row: Hold to talk, Auto-send
+          Padding(
+            padding: const EdgeInsets.only(bottom: Spacing.sm),
+            child: Row(
+              children: [
+                Expanded(
+                  child: Row(
+                    mainAxisSize: MainAxisSize.min,
+                    children: [
+                      _buildThemedSwitch(
+                        value: _holdToTalk,
+                        onChanged: (v) async {
+                          setState(() => _holdToTalk = v);
+                          await ref.read(appSettingsProvider.notifier).setVoiceHoldToTalk(v);
+                        },
+                      ),
+                      const SizedBox(width: Spacing.xs),
+                      Text(
+                        'Hold to talk',
+                        style: TextStyle(color: context.conduitTheme.textSecondary),
+                      ),
+                    ],
+                  ),
+                ),
+                Expanded(
+                  child: Row(
+                    mainAxisAlignment: MainAxisAlignment.end,
+                    children: [
+                      _buildThemedSwitch(
+                        value: _autoSendFinal,
+                        onChanged: (v) async {
+                          setState(() => _autoSendFinal = v);
+                          await ref.read(appSettingsProvider.notifier).setVoiceAutoSendFinal(v);
+                        },
+                      ),
+                      const SizedBox(width: Spacing.xs),
+                      Text(
+                        'Auto-send',
+                        style: TextStyle(color: context.conduitTheme.textSecondary),
+                      ),
+                    ],
+                  ),
+                ),
+              ],
+            ),
+          ),
+
+          // Microphone + waveform
           Expanded(
-            child: Center(
+            child: LayoutBuilder(
-              child: Column(
+              builder: (context, viewport) {
-                mainAxisAlignment: MainAxisAlignment.center,
+                final isUltra = media.size.height < 560;
-                children: [
+                final double micSize = isUltra ? 64 : (isCompact ? 80 : 100);
-                  // Microphone icon with animation (tap to toggle)
+                final double micIconSize = isUltra ? 26 : (isCompact ? 32 : 40);
+                // Extra top padding so scale animation (up to 1.2x) never clips
+                final double topPaddingForScale = ((micSize * 1.2) - micSize) / 2 + 8;
+
+                final content = Center(
+                  child: Column(
+                    mainAxisSize: MainAxisSize.min,
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    children: [
+                      // Top spacer (baseline); additional padding handled by scroll view
+                      SizedBox(height: isUltra ? Spacing.sm : Spacing.md),
+                  // Microphone control
                   GestureDetector(
+                        onTapDown: _holdToTalk
+                            ? (_) {
+                                if (!_isListening) _startListening();
+                              }
+                            : null,
+                        onTapUp: _holdToTalk
+                            ? (_) {
+                                if (_isListening) _stopListening();
+                              }
+                            : null,
+                        onTapCancel: _holdToTalk
+                            ? () {
+                                if (_isListening) _stopListening();
+                              }
+                            : null,
                         onTap: () =>
-                            _isListening ? _stopListening() : _startListening(),
+                            _holdToTalk
+                                ? null
+                                : (_isListening ? _stopListening() : _startListening()),
                         child: Container(
-                          width: 100,
+                          width: micSize,
-                          height: 100,
+                          height: micSize,
                           decoration: BoxDecoration(
                             color: _isListening
                                 ? context.conduitTheme.error.withValues(
@@ -2076,7 +2323,7 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
                                 : (Platform.isIOS
                                       ? CupertinoIcons.mic_off
                                       : Icons.mic_off),
-                            size: 40,
+                            size: micIconSize,
                             color: _isListening
                                 ? context.conduitTheme.error
                                 : context.conduitTheme.iconSecondary,
@@ -2099,22 +2346,24 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
                         end: const Offset(1, 1),
                       ),
 
-                  const SizedBox(height: Spacing.md),
+                  SizedBox(height: isUltra ? Spacing.xs : (isCompact ? Spacing.sm : Spacing.md)),
                   // Simple animated bars waveform based on intensity proxy
                   SizedBox(
-                    height: 32,
+                    height: isUltra ? 18 : (isCompact ? 24 : 32),
                     child: AnimatedSwitcher(
                       duration: const Duration(milliseconds: 150),
                       child: Row(
                         key: ValueKey<int>(_intensity),
                         mainAxisAlignment: MainAxisAlignment.center,
-                        children: List.generate(12, (i) {
+                        children: List.generate(isUltra ? 10 : 12, (i) {
                           final normalized = ((_intensity + i) % 10) / 10.0;
-                          final barHeight = 8 + (normalized * 24);
+                          final base = isUltra ? 4 : (isCompact ? 6 : 8);
+                          final range = isUltra ? 14 : (isCompact ? 18 : 24);
+                          final barHeight = base + (normalized * range);
                           return Container(
-                            width: 4,
+                            width: isUltra ? 2.5 : (isCompact ? 3 : 4),
                             height: barHeight,
-                            margin: const EdgeInsets.symmetric(horizontal: 2),
+                            margin: EdgeInsets.symmetric(horizontal: isUltra ? 1 : (isCompact ? 1.5 : 2)),
                             decoration: BoxDecoration(
                               color: context.conduitTheme.buttonPrimary
                                   .withValues(alpha: 0.7),
@@ -2125,151 +2374,156 @@ class _VoiceInputSheetState extends ConsumerState<_VoiceInputSheet> {
                       ),
                     ),
                   ),
-                  const SizedBox(height: Spacing.xl),
+                  SizedBox(height: isUltra ? Spacing.sm : (isCompact ? Spacing.md : Spacing.xl)),
 
-                  // Recognized text / Transcribing state
+                  // Recognized text / Transcribing state with Clear action
-                  Container(
+                  ConstrainedBox(
-                    margin: const EdgeInsets.symmetric(horizontal: 20),
-                    padding: const EdgeInsets.all(Spacing.md),
                     constraints: BoxConstraints(
-                      maxHeight: MediaQuery.of(context).size.height * 0.2,
+                      maxHeight: media.size.height * (isUltra ? 0.13 : (isCompact ? 0.16 : 0.2)),
-                      minHeight: 80,
+                      minHeight: isUltra ? 56 : (isCompact ? 64 : 80),
                     ),
-                    decoration: BoxDecoration(
+                    child: ConduitCard(
-                      color: context.conduitTheme.inputBackground,
+                      isCompact: isCompact,
-                      borderRadius: BorderRadius.circular(AppBorderRadius.md),
+                      padding: EdgeInsets.all(isCompact ? Spacing.md : Spacing.md),
-                      border: Border.all(
+                      child: Column(
-                        color: context.conduitTheme.inputBorder,
+                        mainAxisSize: MainAxisSize.min,
-                        width: 1,
+                        crossAxisAlignment: CrossAxisAlignment.stretch,
+                        children: [
+                          // Inline clear action aligned to the end
+                          Row(
+                            children: [
+                              Text(
+                                'Transcript',
+                                style: TextStyle(
+                                  fontSize: AppTypography.labelSmall,
+                                  fontWeight: FontWeight.w600,
+                                  color: context.conduitTheme.textSecondary,
+                                ),
+                              ),
+                              const Spacer(),
+                              ConduitIconButton(
+                                icon: Icons.close,
+                                isCompact: true,
+                                tooltip: 'Clear',
+                                onPressed: _recognizedText.isNotEmpty && !_isTranscribing
+                                    ? () {
+                                        setState(() => _recognizedText = '');
+                                      }
+                                    : null,
+                              ),
+                            ],
+                          ),
+                          const SizedBox(height: Spacing.xs),
+                          if (_isTranscribing)
+                            Center(
+                              child: Row(
+                                mainAxisAlignment: MainAxisAlignment.center,
+                                children: [
+                                  ConduitLoadingIndicator(
+                                    size: isUltra ? 14 : (isCompact ? 16 : 18),
+                                    isCompact: true,
+                                  ),
+                                  const SizedBox(width: Spacing.xs),
+                                  Text(
+                                    'Transcribing…',
+                                    style: TextStyle(
+                                      fontSize: isUltra
+                                          ? AppTypography.bodySmall
+                                          : (isCompact
+                                                ? AppTypography.bodyMedium
+                                                : AppTypography.bodyLarge),
+                                      color: context.conduitTheme.textSecondary,
+                                    ),
+                                  ),
+                                ],
+                              ),
+                            )
+                          else
+                            Flexible(
+                              child: SingleChildScrollView(
+                                child: Text(
+                                  _recognizedText.isEmpty
+                                      ? (_isListening
+                                            ? (_voiceService.hasLocalStt
+                                                  ? 'Speak now…'
+                                                  : 'Recording…')
+                                            : 'Tap Start to begin')
+                                      : _recognizedText,
+                                  style: TextStyle(
+                                    fontSize: isUltra
+                                        ? AppTypography.bodySmall
+                                        : (isCompact
+                                              ? AppTypography.bodyMedium
+                                              : AppTypography.bodyLarge),
+                                    color: _recognizedText.isEmpty
+                                        ? context.conduitTheme.inputPlaceholder
+                                        : context.conduitTheme.textPrimary,
+                                    height: 1.4,
+                                  ),
+                                  textAlign: TextAlign.center,
+                                ),
+                              ),
+                            ),
+                        ],
                       ),
                     ),
-                    child: _isTranscribing
-                        ? Center(
-                            child: Row(
-                              mainAxisAlignment: MainAxisAlignment.center,
-                              children: [
-                                SizedBox(
-                                  width: 16,
-                                  height: 16,
-                                  child: CircularProgressIndicator(
-                                    strokeWidth: 2,
-                                    color: context.conduitTheme.buttonPrimary,
-                                  ),
-                                ),
-                                const SizedBox(width: Spacing.xs),
-                                Text(
-                                  'Transcribing…',
-                                  style: TextStyle(
-                                    fontSize: AppTypography.bodyLarge,
-                                    color: context.conduitTheme.textSecondary,
-                                  ),
-                                ),
-                              ],
-                            ),
-                          )
-                        : SingleChildScrollView(
-                            child: Text(
-                              _recognizedText.isEmpty
-                                  ? (_isListening
-                                        ? 'Speak now…'
-                                        : 'Tap Start to begin')
-                                  : _recognizedText,
-                              style: TextStyle(
-                                fontSize: AppTypography.bodyLarge,
-                                color: _recognizedText.isEmpty
-                                    ? context.conduitTheme.inputPlaceholder
-                                    : context.conduitTheme.textPrimary,
-                                height: 1.5,
-                              ),
-                              textAlign: TextAlign.center,
-                            ),
-                          ),
                   ),
-                ],
+                    ],
-              ),
+                  ),
+                );
+
+                // Make scrollable if content exceeds available height
+                return SingleChildScrollView(
+                  physics: const ClampingScrollPhysics(),
+                  padding: EdgeInsets.only(top: topPaddingForScale),
+                  child: ConstrainedBox(
+                    constraints: BoxConstraints(minHeight: viewport.maxHeight),
+                    child: content,
+                  ),
+                );
+              },
             ),
           ),
 
           // Action buttons
-          Padding(
+          Builder(builder: (context) {
-            padding: const EdgeInsets.all(Spacing.lg),
+            final showStartStop = !_holdToTalk;
-            child: Row(
+            final showSend = !_autoSendFinal;
-              children: [
+            if (!showStartStop && !showSend) {
-                // Start/Stop toggle button
+              return const SizedBox.shrink();
-                Expanded(
+            }
-                  child: FilledButton.tonal(
+            return Padding(
-                    onPressed: _isListening ? _stopListening : _startListening,
+              padding: EdgeInsets.only(top: isCompact ? Spacing.sm : Spacing.md),
-                    style: FilledButton.styleFrom(
+              child: Row(
-                      padding: const EdgeInsets.symmetric(vertical: Spacing.md),
+                children: [
-                      shape: RoundedRectangleBorder(
+                  if (showStartStop) ...[
-                        borderRadius: BorderRadius.circular(AppBorderRadius.md),
+                    Expanded(
+                      child: ConduitButton(
+                        text: _isListening ? 'Stop' : 'Start',
+                        isSecondary: true,
+                        isCompact: isCompact,
+                        onPressed: _isListening ? _stopListening : _startListening,
                       ),
                     ),
-                    child: Text(
+                  ],
-                      _isListening ? 'Stop' : 'Start',
+                  if (showStartStop && showSend) const SizedBox(width: Spacing.xs),
-                      style: TextStyle(
+                  if (showSend) ...[
-                        fontSize: AppTypography.bodyLarge,
+                    Expanded(
-                        fontWeight: FontWeight.w600,
+                      child: ConduitButton(
-                        color: context.conduitTheme.textPrimary,
+                        text: 'Send',
+                        isCompact: isCompact,
+                        onPressed: _recognizedText.isNotEmpty ? _sendText : null,
                       ),
                     ),
-                  ),
+                  ],
-                ),
+                ],
-
+              ),
-                const SizedBox(width: Spacing.xs),
+            );
-                // Cancel button
+          }),
-                Expanded(
-                  child: TextButton(
-                    onPressed: _cancel,
-                    style: TextButton.styleFrom(
-                      padding: const EdgeInsets.symmetric(vertical: Spacing.md),
-                      shape: RoundedRectangleBorder(
-                        borderRadius: BorderRadius.circular(AppBorderRadius.md),
-                        side: BorderSide(
-                          color: context.conduitTheme.dividerColor,
-                          width: 1,
-                        ),
-                      ),
-                    ),
-                    child: Text(
-                      'Cancel',
-                      style: TextStyle(
-                        color: context.conduitTheme.textPrimary,
-                        fontSize: AppTypography.bodyLarge,
-                        fontWeight: FontWeight.w500,
-                      ),
-                    ),
-                  ),
-                ),
-
-                const SizedBox(width: Spacing.xs),
-
-                // Send button
-                Expanded(
-                  child: FilledButton(
-                    onPressed: _recognizedText.isNotEmpty ? _sendText : null,
-                    style: FilledButton.styleFrom(
-                      backgroundColor: context.conduitTheme.buttonPrimary,
-                      foregroundColor: context.conduitTheme.buttonPrimaryText,
-                      padding: const EdgeInsets.symmetric(vertical: Spacing.md),
-                      shape: RoundedRectangleBorder(
-                        borderRadius: BorderRadius.circular(AppBorderRadius.md),
-                      ),
-                    ),
-                    child: Text(
-                      'Send',
-                      style: TextStyle(
-                        fontSize: AppTypography.bodyLarge,
-                        fontWeight: FontWeight.w600,
-                      ),
-                    ),
-                  ),
-                ),
-              ],
-            ),
-          ),
         ],
       ),
+        ),
+      ),
     );
   }
 }

pubspec.lock

@@ -824,6 +824,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.3.0"
+  pedantic:
+    dependency: transitive
+    description:
+      name: pedantic
+      sha256: "67fc27ed9639506c856c840ccce7594d0bdcd91bc8d53d6e52359449a1d50602"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.11.1"
   petitparser:
     dependency: transitive
     description:
@@ -1085,6 +1093,30 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "1.10.1"
+  speech_to_text:
+    dependency: "direct main"
+    description:
+      name: speech_to_text
+      sha256: c07557664974afa061f221d0d4186935bea4220728ea9446702825e8b988db04
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.3.0"
+  speech_to_text_platform_interface:
+    dependency: transitive
+    description:
+      name: speech_to_text_platform_interface
+      sha256: a1935847704e41ee468aad83181ddd2423d0833abe55d769c59afca07adb5114
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.3.0"
+  speech_to_text_windows:
+    dependency: transitive
+    description:
+      name: speech_to_text_windows
+      sha256: "2c9846d18253c7bbe059a276297ef9f27e8a2745dead32192525beb208195072"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0+beta.8"
   sprintf:
     dependency: transitive
     description:

pubspec.yaml

@@ -35,6 +35,7 @@ dependencies:
   
   # Platform Features
   record: ^6.0.0
+  speech_to_text: ^7.3.0
   image_picker: ^1.1.2
   file_picker: ^10.2.1
   path_provider: ^2.1.4