feat(auth): Improve user fetching with caching and background refresh

lib/core/models/backend_config.dart

@@ -3,15 +3,55 @@ import 'package:flutter/foundation.dart';
 /// Subset of the backend `/api/config` response the app cares about.
 @immutable
 class BackendConfig {
-  const BackendConfig({this.enableWebsocket});
+  const BackendConfig({
+    this.enableWebsocket,
+    this.enableAudioInput,
+    this.enableAudioOutput,
+    this.sttProvider,
+    this.ttsProvider,
+    this.ttsVoice,
+    this.defaultSttLocale,
+    this.audioSampleRate,
+    this.audioFrameSize,
+    this.vadEnabled,
+  });
 
   /// Mirrors `features.enable_websocket` from OpenWebUI.
   final bool? enableWebsocket;
+  final bool? enableAudioInput;
+  final bool? enableAudioOutput;
+  final String? sttProvider;
+  final String? ttsProvider;
+  final String? ttsVoice;
+  final String? defaultSttLocale;
+  final int? audioSampleRate;
+  final int? audioFrameSize;
+  final bool? vadEnabled;
 
   /// Returns a copy with updated fields.
-  BackendConfig copyWith({bool? enableWebsocket}) {
+  BackendConfig copyWith({
+    bool? enableWebsocket,
+    bool? enableAudioInput,
+    bool? enableAudioOutput,
+    String? sttProvider,
+    String? ttsProvider,
+    String? ttsVoice,
+    String? defaultSttLocale,
+    int? audioSampleRate,
+    int? audioFrameSize,
+    bool? vadEnabled,
+  }) {
     return BackendConfig(
       enableWebsocket: enableWebsocket ?? this.enableWebsocket,
+      enableAudioInput: enableAudioInput ?? this.enableAudioInput,
+      enableAudioOutput: enableAudioOutput ?? this.enableAudioOutput,
+      sttProvider: sttProvider ?? this.sttProvider,
+      ttsProvider: ttsProvider ?? this.ttsProvider,
+      ttsVoice: ttsVoice ?? this.ttsVoice,
+      defaultSttLocale: defaultSttLocale ?? this.defaultSttLocale,
+      audioSampleRate: audioSampleRate ?? this.audioSampleRate,
+      audioFrameSize: audioFrameSize ?? this.audioFrameSize,
+      vadEnabled: vadEnabled ?? this.vadEnabled,
     );
   }
 
@@ -37,28 +77,114 @@ class BackendConfig {
   Map<String, dynamic> toJson() {
     return <String, dynamic>{
       'enable_websocket': enableWebsocket,
+      'enable_audio_input': enableAudioInput,
+      'enable_audio_output': enableAudioOutput,
+      'stt_provider': sttProvider,
+      'tts_provider': ttsProvider,
+      'tts_voice': ttsVoice,
+      'default_stt_locale': defaultSttLocale,
+      'audio_sample_rate': audioSampleRate,
+      'audio_frame_size': audioFrameSize,
+      'vad_enabled': vadEnabled,
     };
   }
 
   static BackendConfig fromJson(Map<String, dynamic> json) {
     bool? enableWebsocket;
+    bool? enableAudioInput;
+    bool? enableAudioOutput;
+    String? sttProvider;
+    String? ttsProvider;
+    String? ttsVoice;
+    String? defaultSttLocale;
+    int? audioSampleRate;
+    int? audioFrameSize;
+    bool? vadEnabled;
     // Try canonical format first
     final value = json['enable_websocket'];
     if (value is bool) {
       enableWebsocket = value;
     }
 
+    final audioIn = json['enable_audio_input'];
+    if (audioIn is bool) enableAudioInput = audioIn;
+    final audioOut = json['enable_audio_output'];
+    if (audioOut is bool) enableAudioOutput = audioOut;
+
+    final stt = json['stt_provider'];
+    if (stt is String) sttProvider = stt;
+    final tts = json['tts_provider'];
+    if (tts is String) ttsProvider = tts;
+    final ttsVoiceValue = json['tts_voice'];
+    if (ttsVoiceValue is String) ttsVoice = ttsVoiceValue;
+
+    final defaultLocale = json['default_stt_locale'];
+    if (defaultLocale is String) defaultSttLocale = defaultLocale;
+
+    final sampleRate = json['audio_sample_rate'];
+    if (sampleRate is int) audioSampleRate = sampleRate;
+    final frameSize = json['audio_frame_size'];
+    if (frameSize is int) audioFrameSize = frameSize;
+
+    final vad = json['vad_enabled'];
+    if (vad is bool) vadEnabled = vad;
+
     // Fallback to nested format for backwards compatibility
-    if (enableWebsocket == null) {
-      final features = json['features'];
-      if (features is Map<String, dynamic>) {
-        final nestedValue = features['enable_websocket'];
-        if (nestedValue is bool) {
-          enableWebsocket = nestedValue;
-        }
+    final features = json['features'];
+    if (features is Map<String, dynamic>) {
+      final nestedValue = features['enable_websocket'];
+      if (nestedValue is bool && enableWebsocket == null) {
+        enableWebsocket = nestedValue;
+      }
+      final nestedAudioIn = features['enable_audio_input'];
+      if (nestedAudioIn is bool && enableAudioInput == null) {
+        enableAudioInput = nestedAudioIn;
+      }
+      final nestedAudioOut = features['enable_audio_output'];
+      if (nestedAudioOut is bool && enableAudioOutput == null) {
+        enableAudioOutput = nestedAudioOut;
+      }
+      final nestedStt = features['stt_provider'];
+      if (nestedStt is String && sttProvider == null) {
+        sttProvider = nestedStt;
+      }
+      final nestedTts = features['tts_provider'];
+      if (nestedTts is String && ttsProvider == null) {
+        ttsProvider = nestedTts;
+      }
+      final nestedVoice = features['tts_voice'];
+      if (nestedVoice is String && ttsVoice == null) {
+        ttsVoice = nestedVoice;
+      }
+      final nestedLocale = features['default_stt_locale'];
+      if (nestedLocale is String && defaultSttLocale == null) {
+        defaultSttLocale = nestedLocale;
+      }
+      final nestedSample = features['audio_sample_rate'];
+      if (nestedSample is int && audioSampleRate == null) {
+        audioSampleRate = nestedSample;
+      }
+      final nestedFrame = features['audio_frame_size'];
+      if (nestedFrame is int && audioFrameSize == null) {
+        audioFrameSize = nestedFrame;
+      }
+      final nestedVad = features['vad_enabled'];
+      if (nestedVad is bool && vadEnabled == null) {
+        vadEnabled = nestedVad;
       }
     }
 
-    return BackendConfig(enableWebsocket: enableWebsocket);
+    return BackendConfig(
+      enableWebsocket: enableWebsocket,
+      enableAudioInput: enableAudioInput,
+      enableAudioOutput: enableAudioOutput,
+      sttProvider: sttProvider,
+      ttsProvider: ttsProvider,
+      ttsVoice: ttsVoice,
+      defaultSttLocale: defaultSttLocale,
+      audioSampleRate: audioSampleRate,
+      audioFrameSize: audioFrameSize,
+      vadEnabled: vadEnabled,
+    );
   }
 }

lib/core/providers/app_providers.dart

@@ -521,17 +521,88 @@ final apiTokenUpdaterProvider = Provider<void>((ref) {
 @Riverpod(keepAlive: true)
 Future<User?> currentUser(Ref ref) async {
   final api = ref.read(apiServiceProvider);
-  final isAuthenticated = ref.watch(isAuthenticatedProvider2);
+  final authState = ref.watch(authStateManagerProvider);
+  final isAuthenticated = authState.maybeWhen(
+    data: (state) => state.isAuthenticated,
+    orElse: () => false,
+  );
 
   if (api == null || !isAuthenticated) return null;
 
+  // Fast path: use user already in auth state.
+  final authUser = authState.maybeWhen(
+    data: (state) => state.user,
+    orElse: () => null,
+  );
+  if (authUser != null) return authUser;
+
+  // Next: try cached user from storage, then refresh in the background.
+  final storage = ref.read(optimizedStorageServiceProvider);
+  final cachedUser = await _getCachedUserWithAvatar(storage);
+  if (cachedUser != null) {
+    final lastRefresh = ref.read(_lastUserRefreshProvider);
+    final now = DateTime.now();
+    final shouldRefresh =
+        lastRefresh == null ||
+        now.difference(lastRefresh) > const Duration(minutes: 5);
+
+    if (shouldRefresh) {
+      Future.microtask(() async {
+        final fresh = await _refreshCurrentUser(ref);
+        if (fresh != null && ref.mounted) {
+          ref.read(_lastUserRefreshProvider.notifier).set(now);
+          ref.invalidate(currentUserProvider);
+        }
+      });
+    }
+    return cachedUser;
+  }
+
+  // Fallback: fetch fresh.
+  final fresh = await _refreshCurrentUser(ref);
+  if (fresh != null) {
+    ref.read(_lastUserRefreshProvider.notifier).set(DateTime.now());
+  }
+  return fresh;
+}
+
+Future<User?> _getCachedUserWithAvatar(OptimizedStorageService storage) async {
+  final cachedUser = await storage.getLocalUser();
+  if (cachedUser == null) return null;
+  final cachedAvatar = await storage.getLocalUserAvatar();
+  if (cachedAvatar == null ||
+      cachedAvatar.isEmpty ||
+      cachedUser.profileImage == cachedAvatar) {
+    return cachedUser;
+  }
+  return cachedUser.copyWith(profileImage: cachedAvatar);
+}
+
+Future<User?> _refreshCurrentUser(Ref ref) async {
+  final api = ref.read(apiServiceProvider);
+  if (api == null) return null;
+
   try {
-    return await api.getCurrentUser();
-  } catch (e) {
+    final user = await api.getCurrentUser();
+    final storage = ref.read(optimizedStorageServiceProvider);
+    await storage.saveLocalUser(user);
+    if (user.profileImage != null && user.profileImage!.isNotEmpty) {
+      await storage.saveLocalUserAvatar(user.profileImage);
+    }
+    return user;
+  } catch (_) {
     return null;
   }
 }
 
+@Riverpod(keepAlive: true)
+class _LastUserRefresh extends _$LastUserRefresh {
+  @override
+  DateTime? build() => null;
+
+  void set(DateTime? timestamp) => state = timestamp;
+}
+
 // Helper provider to force refresh auth state - now using unified system
 final refreshAuthStateProvider = Provider<void>((ref) {
   // This provider can be invalidated to force refresh the unified auth system

lib/features/chat/views/chat_page.dart

@@ -16,7 +16,6 @@ import '../providers/chat_providers.dart';
 import '../../../core/utils/debug_logger.dart';
 import '../../../core/utils/user_display_name.dart';
 import '../../../core/utils/model_icon_utils.dart';
-import '../../auth/providers/unified_auth_providers.dart';
 import '../../../core/utils/android_assistant_handler.dart';
 import '../widgets/modern_chat_input.dart';
 import '../widgets/user_message_bubble.dart';
@@ -1128,8 +1127,7 @@ class _ChatPageState extends ConsumerState<ChatPage> {
       data: (user) => user,
       orElse: () => null,
     );
-    final authUser = ref.watch(currentUserProvider2);
-    final user = userFromProfile ?? authUser;
+    final user = userFromProfile;
     String? greetingName;
     if (user != null) {
       final derived = deriveUserDisplayName(user, fallback: '').trim();

lib/features/navigation/widgets/chats_drawer.dart

@@ -17,7 +17,6 @@ import '../../../shared/widgets/themed_dialogs.dart';
 import 'package:conduit/l10n/app_localizations.dart';
 import '../../../core/utils/user_display_name.dart';
 import '../../../core/utils/model_icon_utils.dart';
-import '../../auth/providers/unified_auth_providers.dart';
 import '../../../core/utils/user_avatar_utils.dart';
 import '../../../shared/utils/conversation_context_menu.dart';
 import '../../../shared/widgets/user_avatar.dart';
@@ -1483,8 +1482,7 @@ class _ChatsDrawerState extends ConsumerState<ChatsDrawer> {
       data: (u) => u,
       orElse: () => null,
     );
-    final authUser = ref.watch(currentUserProvider2);
-    final user = userFromProfile ?? authUser;
+    final user = userFromProfile;
     final api = ref.watch(apiServiceProvider);
 
     String initialFor(String name) {

lib/features/onboarding/views/onboarding_sheet.dart

@@ -8,7 +8,6 @@ import '../../../core/providers/app_providers.dart';
 import '../../../core/utils/user_display_name.dart';
 import '../../../shared/theme/theme_extensions.dart';
 import '../../../shared/widgets/sheet_handle.dart';
-import '../../auth/providers/unified_auth_providers.dart';
 
 class OnboardingSheet extends ConsumerStatefulWidget {
   const OnboardingSheet({super.key});
@@ -73,8 +72,7 @@ class _OnboardingSheetState extends ConsumerState<OnboardingSheet> {
       data: (user) => user,
       orElse: () => null,
     );
-    final authUser = ref.watch(currentUserProvider2);
-    final user = userFromProfile ?? authUser;
+    final user = userFromProfile;
     final greetingName = deriveUserDisplayName(user);
     final pages = _buildPages(l10n, greetingName);
     final pageCount = pages.length;