Merge pull request 'Violet theme, flicker-free refresh, STT context' (#17) from dev into main

lib/app.dart

@@ -193,7 +193,7 @@ class _ShellState extends ConsumerState<_Shell> with WidgetsBindingObserver {
   ];
 
   // Minimum gap between app-resume refreshes to avoid hammering the server.
-  static const _resumeCooldown = Duration(minutes: 5);
+  static const _resumeCooldown = Duration(seconds: 30);
   DateTime? _lastResumeRefresh;
   int? _prevTabIndex;
 
@@ -236,13 +236,13 @@ class _ShellState extends ConsumerState<_Shell> with WidgetsBindingObserver {
   /// Refresh every major data provider. Safe to call speculatively —
   /// providers that aren't currently watched are already disposed.
   void _refreshAll() {
-    ref.invalidate(conversationsProvider);
-    ref.invalidate(calendarProvider);
-    ref.invalidate(newsProvider);
-    // Notifier (not AsyncNotifier) — needs explicit refresh call.
+    ref.read(conversationsProvider.notifier).refresh();
+    ref.read(calendarProvider.notifier).refresh();
+    ref.read(newsProvider.notifier).refresh();
     ref.read(knowledgeProvider.notifier).refresh();
-    // briefingProvider is an AsyncNotifier family; invalidating the family
-    // is safe even if no conversation is open.
+    // briefingProvider is an AsyncNotifier family; invalidating is safe
+    // even if no conversation is open — it doesn't cause flicker since
+    // the briefing screen isn't a list view.
     ref.invalidate(briefingProvider);
   }
 
@@ -254,7 +254,7 @@ class _ShellState extends ConsumerState<_Shell> with WidgetsBindingObserver {
       case 1:
         ref.read(knowledgeProvider.notifier).refresh();
       case 2:
-        ref.invalidate(conversationsProvider);
+        ref.read(conversationsProvider.notifier).refresh();
     }
   }
 

lib/core/theme.dart

@@ -3,21 +3,21 @@ import 'package:google_fonts/google_fonts.dart';
 
 // ── Colour constants ──────────────────────────────────────────────────────────
 
-const _darkBackground    = Color(0xFF111113);
-const _darkSurface       = Color(0xFF18181C);
-const _darkSurfaceVar    = Color(0xFF1E1E24);
-const _darkPrimary       = Color(0xFF6366F1);
-const _darkOnSurface     = Color(0xFFE8E8F0);
+const _darkBackground    = Color(0xFF0F0F14);
+const _darkSurface       = Color(0xFF16161F);
+const _darkSurfaceVar    = Color(0xFF1A1A24);
+const _darkPrimary       = Color(0xFF7C3AED);
+const _darkOnSurface     = Color(0xFFE4E4F0);
 const _darkOnSurfaceVar  = Color(0xFF8888A8);
-const _darkOutline       = Color(0xFF2E2E3A);
+const _darkOutline       = Color(0xFF2A2A3A);
 
-const _lightBackground   = Color(0xFFF4F4F8);
+const _lightBackground   = Color(0xFFF5F5FB);
 const _lightSurface      = Color(0xFFFFFFFF);
-const _lightSurfaceVar   = Color(0xFFF0F0F5);
-const _lightPrimary      = Color(0xFF4F46E5);
-const _lightOnSurface    = Color(0xFF18181C);
-const _lightOnSurfaceVar = Color(0xFF6B6B88);
-const _lightOutline      = Color(0xFFD4D4E4);
+const _lightSurfaceVar   = Color(0xFFF0F0F8);
+const _lightPrimary      = Color(0xFF7C3AED);
+const _lightOnSurface    = Color(0xFF1A1A1A);
+const _lightOnSurfaceVar = Color(0xFF666666);
+const _lightOutline      = Color(0xFFDDDDE8);
 
 // ── Typography ─────────────────────────────────────────────────────────────────
 
@@ -41,7 +41,7 @@ ThemeData fabledDarkTheme() {
     brightness:          Brightness.dark,
     primary:             _darkPrimary,
     onPrimary:           Colors.white,
-    primaryContainer:    const Color(0xFF3730A3),
+    primaryContainer:    const Color(0xFF5B21B6),
     onPrimaryContainer:  _darkOnSurface,
     secondary:           _darkPrimary,
     onSecondary:         Colors.white,
@@ -118,7 +118,7 @@ ThemeData fabledLightTheme() {
     brightness:          Brightness.light,
     primary:             _lightPrimary,
     onPrimary:           Colors.white,
-    primaryContainer:    const Color(0xFFE0E0FF),
+    primaryContainer:    const Color(0xFFEDE5FF),
     onPrimaryContainer:  _lightOnSurface,
     secondary:           _lightPrimary,
     onSecondary:         Colors.white,
@@ -218,15 +218,15 @@ class GradientButton extends StatelessWidget {
               : const LinearGradient(
                   begin: Alignment.topLeft,
                   end: Alignment.bottomRight,
-                  colors: [Color(0xFF6366F1), Color(0xFF4F46E5)],
+                  colors: [Color(0xFF7C3AED), Color(0xFF5B21B6)],
                 ),
-          color: disabled ? const Color(0xFF6366F1) : null,
+          color: disabled ? const Color(0xFF7C3AED) : null,
           borderRadius: BorderRadius.circular(12),
           boxShadow: disabled
               ? null
               : [
                   BoxShadow(
-                    color: const Color(0xFF6366F1).withValues(alpha: 0.35),
+                    color: const Color(0xFF7C3AED).withValues(alpha: 0.45),
                     blurRadius: 8,
                     offset: const Offset(0, 3),
                   ),

lib/data/api/voice_api.dart

@@ -40,16 +40,20 @@ class VoiceApi {
   }
 
   /// POST WebM/Opus audio bytes and return the transcript string.
+  /// [context] is optional recent conversation text passed as initial_prompt
+  /// to Whisper, reducing mishearings of domain-specific words.
   /// Returns empty string on empty or error response.
-  Future<String> transcribe(Uint8List audioBytes) async {
+  Future<String> transcribe(Uint8List audioBytes, {String? context}) async {
     try {
-      final formData = FormData.fromMap({
+      final fields = <String, dynamic>{
         'audio': MultipartFile.fromBytes(
           audioBytes,
           filename: 'audio.m4a',
           contentType: DioMediaType('audio', 'mp4'),
         ),
-      });
+        if (context != null && context.isNotEmpty) 'context': context,
+      };
+      final formData = FormData.fromMap(fields);
       final response = await _dio.post(
         '/api/voice/transcribe',
         data: formData,

lib/data/repositories/voice_repository.dart

@@ -7,6 +7,7 @@ class VoiceRepository {
   const VoiceRepository(this._api);
 
   Future<VoiceStatus> checkStatus() => _api.checkStatus();
-  Future<String> transcribe(Uint8List audioBytes) => _api.transcribe(audioBytes);
+  Future<String> transcribe(Uint8List audioBytes, {String? context}) =>
+      _api.transcribe(audioBytes, context: context);
   Future<Uint8List> synthesise(String text) => _api.synthesise(text);
 }

lib/providers/calendar_provider.dart

@@ -56,6 +56,17 @@ class CalendarNotifier extends AsyncNotifier<CalendarState> {
     );
   }
 
+  /// Re-fetch events for the current range without clearing state (no flicker).
+  Future<void> refresh() async {
+    final current = state.value;
+    if (current == null) return;
+    final events = await ref.read(eventsApiProvider).getEvents(
+      current.loadedRange.start,
+      current.loadedRange.end,
+    );
+    state = AsyncData(current.copyWith(eventsByDay: _groupByDay(events)));
+  }
+
   /// Synchronously updates selectedDay and focusedMonth. No API call.
   void selectDay(DateTime day) {
     final current = state.value;

lib/providers/chat_provider.dart

@@ -58,6 +58,12 @@ class ConversationsNotifier extends AsyncNotifier<List<Conversation>> {
     ]);
   }
 
+  /// Re-fetch conversations without clearing the current list (no flicker).
+  Future<void> refresh() async {
+    final fresh = await ref.read(chatRepositoryProvider).getConversations();
+    state = AsyncData(fresh);
+  }
+
   // Called after a message is sent to patch the server-generated title
   // in-place without triggering a full reload or loading state.
   void patchConversation(Conversation updated) {
@@ -86,6 +92,13 @@ class MessagesNotifier extends AsyncNotifier<List<Message>> {
     return messages;
   }
 
+  /// Re-fetch messages without clearing the current list (no flicker).
+  Future<void> refresh() async {
+    final (_, messages) =
+        await ref.read(chatRepositoryProvider).getMessages(_convId);
+    state = AsyncData(messages);
+  }
+
   Future<void> sendMessage(String content) async {
     final convId = _convId;
     final repo = ref.read(chatRepositoryProvider);

lib/providers/knowledge_provider.dart

@@ -115,12 +115,43 @@ class KnowledgeNotifier extends Notifier<KnowledgeState> {
   }
 
   Future<void> refresh() async {
-    state = KnowledgeState(
-      noteType: state.noteType,
-      activeTags: state.activeTags,
-      searchQuery: state.searchQuery,
-    );
-    await _fetchFromScratch();
+    // Keep current items visible during re-fetch (no flicker).
+    try {
+      if (state.noteType == 'task') {
+        final tasks = await ref.read(tasksApiProvider).getAll();
+        final items = {
+          for (final t in tasks) t.id: KnowledgeItem.fromTask(t),
+        };
+        state = state.copyWith(
+          ids: tasks.map((t) => t.id).toList(),
+          items: items,
+          totalIds: tasks.length,
+          hasMore: false,
+        );
+        await _loadCounts();
+        return;
+      }
+
+      final (ids, total) = await _repo.fetchIds(
+        noteType: state.noteType,
+        tags: state.activeTags,
+        q: state.searchQuery,
+        limit: 50,
+        offset: 0,
+      );
+      // Hydrate the new IDs
+      final batch = await _repo.fetchBatch(ids);
+      final freshItems = {for (final item in batch) item.id: item};
+      state = state.copyWith(
+        ids: ids,
+        items: freshItems,
+        totalIds: total,
+        hasMore: ids.length < total,
+      );
+      await Future.wait([_loadCounts(), _loadTags()]);
+    } catch (_) {
+      // Silent — stale data is better than an error on refresh
+    }
   }
 
   // ── Scroll-triggered loaders ─────────────────────────────────────────────

lib/providers/news_provider.dart

@@ -71,6 +71,25 @@ class NewsNotifier extends AsyncNotifier<NewsState> {
     );
   }
 
+  /// Re-fetch the first page without clearing state (no flicker).
+  Future<void> refresh() async {
+    final current = state.value;
+    final items = await ref.read(newsApiProvider).getNewsItems(
+          days: 90,
+          limit: _limit,
+          offset: 0,
+          feedId: current?.selectedFeedId,
+        );
+    state = AsyncData(NewsState(
+      items: items,
+      offset: items.length,
+      hasMore: items.length == _limit,
+      loadingMore: false,
+      selectedFeedId: current?.selectedFeedId,
+      reactions: {for (final item in items) item.id: item.reaction},
+    ));
+  }
+
   Future<void> loadMore() async {
     final current = state.value;
     if (current == null || current.loadingMore || !current.hasMore) return;

lib/providers/projects_provider.dart

@@ -15,6 +15,12 @@ class ProjectsNotifier extends AsyncNotifier<List<Project>> {
         .getAll(sort: 'updated_at', order: 'desc');
   }
 
+  Future<void> refresh() async {
+    final fresh = await ref.read(projectsRepositoryProvider)
+        .getAll(sort: 'updated_at', order: 'desc');
+    state = AsyncData(fresh);
+  }
+
   Future<Project> create({
     required String title,
     String? description,

lib/providers/tasks_provider.dart

@@ -17,6 +17,11 @@ class TasksNotifier extends AsyncNotifier<List<Task>> {
     return ref.watch(tasksRepositoryProvider).getAll();
   }
 
+  Future<void> refresh() async {
+    final fresh = await ref.read(tasksRepositoryProvider).getAll();
+    state = AsyncData(fresh);
+  }
+
   Future<Task> create({
     required String title,
     String? description,

lib/providers/voice_provider.dart

@@ -108,6 +108,10 @@ class VoiceNotifier extends Notifier<VoiceState> {
   int _lastSeenLength = 0;
   bool _streamComplete = false;
 
+  // Last complete assistant response — passed to Whisper as initial_prompt
+  // to reduce STT mishearings of domain-specific words.
+  String _lastAssistantContent = '';
+
   // TTS playback queue
   final _ttsQueue = Queue<Uint8List>();
   bool _ttsPlaying = false;
@@ -205,6 +209,7 @@ class VoiceNotifier extends Notifier<VoiceState> {
     _dispatchSentences(flush: isComplete);
 
     if (isComplete) {
+      _lastAssistantContent = fullContent;
       _streamComplete = true;
       _checkRestartListening();
     }
@@ -278,8 +283,10 @@ class VoiceNotifier extends Notifier<VoiceState> {
 
       if (!state.voiceModeActive) return;
 
-      final transcript =
-          await ref.read(voiceRepositoryProvider).transcribe(bytes);
+      final transcript = await ref.read(voiceRepositoryProvider).transcribe(
+            bytes,
+            context: _lastAssistantContent.isNotEmpty ? _lastAssistantContent : null,
+          );
 
       if (!state.voiceModeActive) return;
 

lib/screens/briefing/briefing_screen.dart

@@ -462,7 +462,7 @@ class _GradientSendButton extends StatelessWidget {
             : const LinearGradient(
                 begin: Alignment.topLeft,
                 end: Alignment.bottomRight,
-                colors: [Color(0xFF6366F1), Color(0xFF4F46E5)],
+                colors: [Color(0xFF7C3AED), Color(0xFF5B21B6)],
               ),
         color: disabled ? scheme.onSurface.withValues(alpha: 0.12) : null,
         borderRadius: BorderRadius.circular(10),

lib/screens/calendar/calendar_screen.dart

@@ -67,10 +67,13 @@ class CalendarScreen extends ConsumerWidget {
             ),
             const Divider(height: 1),
             Expanded(
-              child: _AgendaList(
-                events:
-                    cal.eventsByDay[dateOnly(cal.selectedDay)] ?? [],
-                notifier: notifier,
+              child: RefreshIndicator(
+                onRefresh: () => ref.read(calendarProvider.notifier).refresh(),
+                child: _AgendaList(
+                  events:
+                      cal.eventsByDay[dateOnly(cal.selectedDay)] ?? [],
+                  notifier: notifier,
+                ),
               ),
             ),
           ],
@@ -106,7 +109,12 @@ class _AgendaList extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     if (events.isEmpty) {
-      return const Center(child: Text('No events'));
+      return ListView(
+        children: const [
+          SizedBox(height: 80),
+          Center(child: Text('No events')),
+        ],
+      );
     }
     return ListView.builder(
       padding: const EdgeInsets.symmetric(vertical: 8),

lib/screens/calendar/event_form_sheet.dart

@@ -57,7 +57,7 @@ class _EventFormSheetState extends ConsumerState<EventFormSheet> {
     '#EF4444',
     '#F59E0B',
     '#10B981',
-    '#6366F1',
+    '#7C3AED',
     '#8B5CF6',
     '#EC4899',
   ];

lib/screens/chat/chat_screen.dart

@@ -16,12 +16,27 @@ class ChatScreen extends ConsumerStatefulWidget {
   ConsumerState<ChatScreen> createState() => _ChatScreenState();
 }
 
-class _ChatScreenState extends ConsumerState<ChatScreen> {
+class _ChatScreenState extends ConsumerState<ChatScreen>
+    with WidgetsBindingObserver {
   final _controller = TextEditingController();
   final _scrollController = ScrollController();
 
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addObserver(this);
+  }
+
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    if (state == AppLifecycleState.resumed) {
+      ref.read(messagesProvider(widget.conversationId).notifier).refresh();
+    }
+  }
+
   @override
   void dispose() {
+    WidgetsBinding.instance.removeObserver(this);
     _controller.dispose();
     _scrollController.dispose();
     // Exit voice mode if the user navigates away mid-session.

lib/screens/chat/conversations_tab_screen.dart

@@ -64,7 +64,7 @@ class ConversationsTabScreen extends ConsumerWidget {
             );
           }
           return RefreshIndicator(
-            onRefresh: () async => ref.invalidate(conversationsProvider),
+            onRefresh: () => ref.read(conversationsProvider.notifier).refresh(),
             child: ListView.builder(
               itemCount: convs.length,
               itemBuilder: (ctx, i) {

lib/screens/library/project_tasks_screen.dart

@@ -55,11 +55,11 @@ class _ProjectTasksScreenState extends ConsumerState<ProjectTasksScreen> {
   }
 
   Color _parseColor(String? hex) {
-    if (hex == null || hex.isEmpty) return const Color(0xFF6366F1);
+    if (hex == null || hex.isEmpty) return const Color(0xFF7C3AED);
     try {
       return Color(int.parse(hex.replaceFirst('#', '0xFF')));
     } catch (_) {
-      return const Color(0xFF6366F1);
+      return const Color(0xFF7C3AED);
     }
   }
 
@@ -151,8 +151,10 @@ class _ProjectTasksScreenState extends ConsumerState<ProjectTasksScreen> {
     return RefreshIndicator(
       onRefresh: () async {
         setState(() => _pendingStatus.clear());
-        ref.invalidate(projectTasksProvider(widget.projectId));
-        ref.invalidate(projectMilestonesProvider(widget.projectId));
+        await Future.wait([
+          ref.refresh(projectTasksProvider(widget.projectId).future),
+          ref.refresh(projectMilestonesProvider(widget.projectId).future),
+        ]);
       },
       child: CustomScrollView(
         slivers: [

lib/screens/news/news_screen.dart

@@ -96,7 +96,9 @@ class _NewsScreenState extends ConsumerState<NewsScreen> {
             ),
             const Divider(height: 1),
             Expanded(
-              child: ListView.builder(
+              child: RefreshIndicator(
+                onRefresh: () => ref.read(newsProvider.notifier).refresh(),
+                child: ListView.builder(
                 padding:
                     const EdgeInsets.symmetric(horizontal: 8, vertical: 8),
                 itemCount: news.items.length + 1,
@@ -128,6 +130,7 @@ class _NewsScreenState extends ConsumerState<NewsScreen> {
                   );
                 },
               ),
+              ),
             ),
           ],
         ),

lib/screens/projects/projects_screen.dart

@@ -19,7 +19,7 @@ class ProjectsScreen extends ConsumerWidget {
         data: (projects) => projects.isEmpty
             ? const Center(child: Text('No projects yet.'))
             : RefreshIndicator(
-                onRefresh: () async => ref.invalidate(projectsProvider),
+                onRefresh: () => ref.read(projectsProvider.notifier).refresh(),
                 child: ListView.separated(
                   itemCount: projects.length,
                   separatorBuilder: (_, _) => const Divider(height: 1),