fix: server side tts on ios

ios/Podfile.lock

@@ -1,6 +1,7 @@
 PODS:
   - audioplayers_darwin (0.0.1):
     - Flutter
+    - FlutterMacOS
   - connectivity_plus (0.0.1):
     - Flutter
   - DKImagePickerController/Core (4.3.9):
@@ -86,7 +87,7 @@ PODS:
     - FlutterMacOS
 
 DEPENDENCIES:
-  - audioplayers_darwin (from `.symlinks/plugins/audioplayers_darwin/ios`)
+  - audioplayers_darwin (from `.symlinks/plugins/audioplayers_darwin/darwin`)
   - connectivity_plus (from `.symlinks/plugins/connectivity_plus/ios`)
   - file_picker (from `.symlinks/plugins/file_picker/ios`)
   - Flutter (from `Flutter`)
@@ -117,7 +118,7 @@ SPEC REPOS:
 
 EXTERNAL SOURCES:
   audioplayers_darwin:
-    :path: ".symlinks/plugins/audioplayers_darwin/ios"
+    :path: ".symlinks/plugins/audioplayers_darwin/darwin"
   connectivity_plus:
     :path: ".symlinks/plugins/connectivity_plus/ios"
   file_picker:
@@ -160,7 +161,7 @@ EXTERNAL SOURCES:
     :path: ".symlinks/plugins/webview_flutter_wkwebview/darwin"
 
 SPEC CHECKSUMS:
-  audioplayers_darwin: ccf9c770ee768abb07e26d90af093f7bab1c12ab
+  audioplayers_darwin: 4f9ca89d92d3d21cec7ec580e78ca888e5fb68bd
   connectivity_plus: cb623214f4e1f6ef8fe7403d580fdad517d2f7dd
   DKImagePickerController: 946cec48c7873164274ecc4624d19e3da4c1ef3c
   DKPhotoGallery: b3834fecb755ee09a593d7c9e389d8b5d6deed60

lib/core/services/api_service.dart

@@ -2438,7 +2438,7 @@ class ApiService {
     return [];
   }
 
-  Future<List<int>> generateSpeech({
+  Future<({Uint8List bytes, String mimeType})> generateSpeech({
     required String text,
     String? voice,
   }) async {
@@ -2450,12 +2450,75 @@ class ApiService {
       options: Options(responseType: ResponseType.bytes),
     );
 
-    // Return audio data as bytes
+    final rawMimeType = response.headers.value('content-type');
-    final data = response.data;
+    final audioBytes = _coerceAudioBytes(response.data);
-    if (data is List<int>) return data;
+    final resolvedMimeType = _resolveAudioMimeType(rawMimeType, audioBytes);
-    if (data is Uint8List) return data.toList();
+
-    if (data is List) return (data).cast<int>();
+    return (bytes: audioBytes, mimeType: resolvedMimeType);
-    return [];
+  }
+
+  Uint8List _coerceAudioBytes(Object? data) {
+    if (data is Uint8List && data.isNotEmpty) {
+      return Uint8List.fromList(data);
+    }
+    if (data is List<int>) {
+      return Uint8List.fromList(data);
+    }
+    if (data is List) {
+      return Uint8List.fromList(data.cast<int>());
+    }
+    return Uint8List(0);
+  }
+
+  String _resolveAudioMimeType(String? rawMimeType, Uint8List bytes) {
+    final sanitized = rawMimeType?.split(';').first.trim();
+    if (sanitized != null && sanitized.isNotEmpty) {
+      return sanitized;
+    }
+    if (_matchesPrefix(bytes, const [0x52, 0x49, 0x46, 0x46]) &&
+        _matchesPrefix(bytes, const [0x57, 0x41, 0x56, 0x45], offset: 8)) {
+      return 'audio/wav';
+    }
+    if (_matchesPrefix(bytes, const [0x4F, 0x67, 0x67, 0x53])) {
+      return 'audio/ogg';
+    }
+    if (_matchesPrefix(bytes, const [0x66, 0x4C, 0x61, 0x43])) {
+      return 'audio/flac';
+    }
+    if (_looksLikeMp4(bytes)) {
+      return 'audio/mp4';
+    }
+    if (_looksLikeMpeg(bytes)) {
+      return 'audio/mpeg';
+    }
+    return 'audio/mpeg';
+  }
+
+  bool _matchesPrefix(Uint8List bytes, List<int> signature, {int offset = 0}) {
+    if (bytes.length < offset + signature.length) {
+      return false;
+    }
+    for (var i = 0; i < signature.length; i++) {
+      if (bytes[offset + i] != signature[i]) {
+        return false;
+      }
+    }
+    return true;
+  }
+
+  bool _looksLikeMp4(Uint8List bytes) {
+    return bytes.length >= 8 &&
+        _matchesPrefix(bytes, const [0x66, 0x74, 0x79, 0x70], offset: 4);
+  }
+
+  bool _looksLikeMpeg(Uint8List bytes) {
+    if (bytes.length >= 3 &&
+        bytes[0] == 0x49 &&
+        bytes[1] == 0x44 &&
+        bytes[2] == 0x33) {
+      return true;
+    }
+    return bytes.length >= 2 && bytes[0] == 0xFF && (bytes[1] & 0xE0) == 0xE0;
   }
 
   // Server audio transcription removed; rely on on-device STT in UI layer

lib/core/services/background_streaming_handler.dart

@@ -27,11 +27,11 @@ class BackgroundStreamingHandler {
   void Function(List<String> streamIds)? onStreamsSuspending;
   void Function()? onBackgroundTaskExpiring;
   void Function(List<String> streamIds, int estimatedSeconds)?
-      onBackgroundTaskExtended;
+  onBackgroundTaskExtended;
   void Function()? onBackgroundKeepAlive;
   bool Function()? shouldContinueInBackground;
   void Function(String error, String errorType, List<String> streamIds)?
-      onServiceFailed;
+  onServiceFailed;
 
   void _setupMethodCallHandler() {
     _channel.setMethodCallHandler((call) async {

lib/core/services/persistent_streaming_service.dart

@@ -178,9 +178,7 @@ class PersistentStreamingService with WidgetsBindingObserver {
     for (final streamId in staleStreams) {
       final callback = _streamRecoveryCallbacks[streamId];
       if (callback != null && _retryAttempts[streamId] == null) {
-        DebugLogger.stream(
+        DebugLogger.stream('Initiating recovery for stale stream: $streamId');
-          'Initiating recovery for stale stream: $streamId',
-        );
         _attemptStreamRecovery(streamId, callback);
       }
     }

lib/core/services/sse_stream_parser.dart

@@ -27,19 +27,16 @@ class SSEStreamParser {
 
     // Set up heartbeat monitoring
     if (heartbeatTimeout.inMilliseconds > 0) {
-      heartbeatTimer = Timer.periodic(
+      heartbeatTimer = Timer.periodic(const Duration(seconds: 30), (timer) {
-        const Duration(seconds: 30),
+        final timeSinceLastData = DateTime.now().difference(lastDataReceived);
-        (timer) {
+        if (timeSinceLastData > heartbeatTimeout) {
-          final timeSinceLastData = DateTime.now().difference(lastDataReceived);
+          DebugLogger.warning(
-          if (timeSinceLastData > heartbeatTimeout) {
+            'SSE stream heartbeat timeout: No data received for ${timeSinceLastData.inSeconds}s',
-            DebugLogger.warning(
+            data: {'timeout': heartbeatTimeout.inSeconds},
-              'SSE stream heartbeat timeout: No data received for ${timeSinceLastData.inSeconds}s',
+          );
-              data: {'timeout': heartbeatTimeout.inSeconds},
+          timer.cancel();
-            );
+        }
-            timer.cancel();
+      });
-          }
-        },
-      );
     }
 
     try {

lib/core/widgets/error_boundary.dart

@@ -198,8 +198,10 @@ class _ErrorBoundaryState extends ConsumerState<ErrorBoundary> {
                             onPressed: _retry,
                             icon: const Icon(Icons.refresh_rounded),
                             style: FilledButton.styleFrom(
-                              backgroundColor: context.conduitTheme.buttonPrimary,
+                              backgroundColor:
-                              foregroundColor: context.conduitTheme.buttonPrimaryText,
+                                  context.conduitTheme.buttonPrimary,
+                              foregroundColor:
+                                  context.conduitTheme.buttonPrimaryText,
                               padding: const EdgeInsets.symmetric(
                                 horizontal: Spacing.lg,
                                 vertical: Spacing.md,
@@ -212,7 +214,8 @@ class _ErrorBoundaryState extends ConsumerState<ErrorBoundary> {
                               elevation: 0,
                             ),
                             label: Text(
-                              AppLocalizations.of(context)?.retry ?? 'Try Again',
+                              AppLocalizations.of(context)?.retry ??
+                                  'Try Again',
                               style: context.conduitTheme.bodySmall?.copyWith(
                                 fontWeight: FontWeight.w600,
                                 color: context.conduitTheme.buttonPrimaryText,

lib/features/chat/services/text_to_speech_service.dart

@@ -9,6 +9,8 @@ import 'package:flutter_tts/flutter_tts.dart';
 import '../../../core/services/api_service.dart';
 import '../../../core/services/settings_service.dart';
 
+typedef _SpeechChunk = ({Uint8List bytes, String mimeType});
+
 /// Lightweight wrapper around FlutterTts to centralize configuration
 class TextToSpeechService {
   final FlutterTts _tts = FlutterTts();
@@ -20,7 +22,7 @@ class TextToSpeechService {
   bool _available = false;
   bool _voiceConfigured = false;
   int _session = 0; // increments to cancel in-flight work
-  final List<Uint8List> _buffered = <Uint8List>[]; // server chunks
+  final List<_SpeechChunk> _buffered = <_SpeechChunk>[]; // server chunks
   int _expectedChunks = 0;
   int _currentIndex = -1;
   bool _waitingNext = false;
@@ -51,9 +53,6 @@ class TextToSpeechService {
         case PlayerState.paused:
           _handlePause();
           break;
-        case PlayerState.stopped:
-          _handleCancel();
-          break;
         default:
           break;
       }
@@ -238,6 +237,7 @@ class TextToSpeechService {
       _waitingNext = false;
       if (_engine == TtsEngine.server) {
         await _player.stop();
+        _handleCancel();
       } else {
         await _tts.stop();
       }
@@ -486,18 +486,23 @@ class TextToSpeechService {
     _expectedChunks = chunks.length;
 
     // Fetch first chunk to start playback quickly
-    final firstBytes = await _fetchServerAudio(
+    final firstChunk = await _fetchServerAudio(
       chunks.first,
       effectiveVoice,
       session,
     );
     if (session != _session) return; // canceled
-    if (firstBytes.isEmpty) throw Exception('Empty audio response');
+    if (firstChunk.bytes.isEmpty) {
+      throw Exception('Empty audio response');
+    }
 
     await _player.stop();
-    _buffered.add(Uint8List.fromList(firstBytes));
+    final bufferedFirst = _cloneChunk(firstChunk);
+    _buffered.add(bufferedFirst);
     _currentIndex = 0;
-    await _player.play(BytesSource(_buffered.first));
+    await _player.play(
+      BytesSource(bufferedFirst.bytes, mimeType: bufferedFirst.mimeType),
+    );
     _onSentenceIndex?.call(0);
 
     // Prefetch the rest in background
@@ -518,10 +523,10 @@ class TextToSpeechService {
     for (final chunk in remaining) {
       if (session != _session) return; // canceled
       try {
-        final audio = await _fetchServerAudio(chunk, voice, session);
+        final audioChunk = await _fetchServerAudio(chunk, voice, session);
         if (session != _session) return;
-        if (audio.isNotEmpty) {
+        if (audioChunk.bytes.isNotEmpty) {
-          _buffered.add(Uint8List.fromList(audio));
+          _buffered.add(_cloneChunk(audioChunk));
           // If the player finished the previous chunk and is waiting, start now
           if (_waitingNext && (_currentIndex + 1) < _buffered.length) {
             _waitingNext = false;
@@ -535,7 +540,7 @@ class TextToSpeechService {
     }
   }
 
-  Future<List<int>> _fetchServerAudio(
+  Future<_SpeechChunk> _fetchServerAudio(
     String text,
     String? voice,
     int session,
@@ -565,11 +570,15 @@ class TextToSpeechService {
     final nextIndex = _currentIndex + 1;
     if (nextIndex < 0 || nextIndex >= _buffered.length) return;
     _currentIndex = nextIndex;
-    final bytes = _buffered[nextIndex];
+    final chunk = _buffered[nextIndex];
-    await _player.play(BytesSource(bytes));
+    await _player.play(BytesSource(chunk.bytes, mimeType: chunk.mimeType));
     _onSentenceIndex?.call(_currentIndex);
   }
 
+  _SpeechChunk _cloneChunk(_SpeechChunk chunk) {
+    return (bytes: Uint8List.fromList(chunk.bytes), mimeType: chunk.mimeType);
+  }
+
   List<String> _splitForTts(String text) {
     // Normalize whitespace
     final normalized = text.replaceAll(RegExp(r"\s+"), ' ').trim();

lib/features/chat/widgets/modern_chat_input.dart

@@ -1557,7 +1557,9 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
 
     // Enhanced color scheme for active state
     final Color activeBackground = isActive
-        ? theme.buttonPrimary.withValues(alpha: brightness == Brightness.dark ? 0.22 : 0.14)
+        ? theme.buttonPrimary.withValues(
+            alpha: brightness == Brightness.dark ? 0.22 : 0.14,
+          )
         : Colors.transparent;
 
     final Color inactiveBackground = brightness == Brightness.dark
@@ -1578,13 +1580,13 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
     // Enhanced content colors
     final Color activeTextColor = theme.buttonPrimary;
     final Color inactiveTextColor = theme.textPrimary.withValues(
-      alpha: enabled ? (brightness == Brightness.dark ? 0.85 : 0.75) : Alpha.disabled,
+      alpha: enabled
+          ? (brightness == Brightness.dark ? 0.85 : 0.75)
+          : Alpha.disabled,
     );
     final Color textColor = isActive ? activeTextColor : inactiveTextColor;
 
-    final Color iconColor = isActive
+    final Color iconColor = isActive ? activeTextColor : inactiveTextColor;
-        ? activeTextColor
-        : inactiveTextColor;
 
     return AnimatedContainer(
       duration: const Duration(milliseconds: 200),
@@ -1632,11 +1634,7 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
                 AnimatedContainer(
                   duration: const Duration(milliseconds: 200),
                   curve: Curves.easeOutCubic,
-                  child: Icon(
+                  child: Icon(icon, size: IconSize.small + 1, color: iconColor),
-                    icon,
-                    size: IconSize.small + 1,
-                    color: iconColor,
-                  ),
                 ),
                 const SizedBox(width: Spacing.xs + 1),
                 AnimatedDefaultTextStyle(

pubspec.lock

@@ -69,58 +69,58 @@ packages:
     dependency: "direct main"
     description:
       name: audioplayers
-      sha256: c05c6147124cd63e725e861335a8b4d57300b80e6e92cea7c145c739223bbaef
+      sha256: "5441fa0ceb8807a5ad701199806510e56afde2b4913d9d17c2f19f2902cf0ae4"
       url: "https://pub.dev"
     source: hosted
-    version: "5.2.1"
+    version: "6.5.1"
   audioplayers_android:
     dependency: transitive
     description:
       name: audioplayers_android
-      sha256: b00e1a0e11365d88576320ec2d8c192bc21f1afb6c0e5995d1c57ae63156acb5
+      sha256: "60a6728277228413a85755bd3ffd6fab98f6555608923813ce383b190a360605"
       url: "https://pub.dev"
     source: hosted
-    version: "4.0.3"
+    version: "5.2.1"
   audioplayers_darwin:
     dependency: transitive
     description:
       name: audioplayers_darwin
-      sha256: "3034e99a6df8d101da0f5082dcca0a2a99db62ab1d4ddb3277bed3f6f81afe08"
+      sha256: "0811d6924904ca13f9ef90d19081e4a87f7297ddc19fc3d31f60af1aaafee333"
       url: "https://pub.dev"
     source: hosted
-    version: "5.0.2"
+    version: "6.3.0"
   audioplayers_linux:
     dependency: transitive
     description:
       name: audioplayers_linux
-      sha256: "60787e73fefc4d2e0b9c02c69885402177e818e4e27ef087074cf27c02246c9e"
+      sha256: f75bce1ce864170ef5e6a2c6a61cd3339e1a17ce11e99a25bae4474ea491d001
       url: "https://pub.dev"
     source: hosted
-    version: "3.1.0"
+    version: "4.2.1"
   audioplayers_platform_interface:
     dependency: transitive
     description:
       name: audioplayers_platform_interface
-      sha256: "365c547f1bb9e77d94dd1687903a668d8f7ac3409e48e6e6a3668a1ac2982adb"
+      sha256: "0e2f6a919ab56d0fec272e801abc07b26ae7f31980f912f24af4748763e5a656"
       url: "https://pub.dev"
     source: hosted
-    version: "6.1.0"
+    version: "7.1.1"
   audioplayers_web:
     dependency: transitive
     description:
       name: audioplayers_web
-      sha256: "22cd0173e54d92bd9b2c80b1204eb1eb159ece87475ab58c9788a70ec43c2a62"
+      sha256: "1c0f17cec68455556775f1e50ca85c40c05c714a99c5eb1d2d57cc17ba5522d7"
       url: "https://pub.dev"
     source: hosted
-    version: "4.1.0"
+    version: "5.1.1"
   audioplayers_windows:
     dependency: transitive
     description:
       name: audioplayers_windows
-      sha256: "9536812c9103563644ada2ef45ae523806b0745f7a78e89d1b5fb1951de90e1a"
+      sha256: "4048797865105b26d47628e6abb49231ea5de84884160229251f37dfcbe52fd7"
       url: "https://pub.dev"
     source: hosted
-    version: "3.1.0"
+    version: "4.2.1"
   boolean_selector:
     dependency: transitive
     description:

pubspec.yaml

@@ -47,7 +47,7 @@ dependencies:
   record: ^6.1.1
   stts: ^1.2.5
   flutter_tts: ^4.2.3
-  audioplayers: ^5.2.1
+  audioplayers: ^6.5.1
   image_picker: ^1.2.0
   file_picker: ^10.3.3
   path_provider: ^2.1.4