refactor: login and streaming issues

lib/core/providers/app_providers.dart

@@ -254,6 +254,32 @@ final apiTokenUpdaterProvider = Provider<void>((ref) {
         data: {'length': length},
       );
     }
+
+    // When the token transitions from empty -> present, force-refresh models
+    final hadToken = previous != null && previous.isNotEmpty;
+    final hasToken = next != null && next.isNotEmpty;
+
+    if (!hadToken && hasToken) {
+      // New valid token acquired (e.g., re-login). Invalidate caches that
+      // depend on authentication so next reads refetch from server.
+      DebugLogger.log('invalidate-on-auth', scope: 'models');
+      ref.invalidate(modelsProvider);
+      ref.invalidate(defaultModelProvider);
+      // Refresh permissions to enable gated features promptly
+      ref.invalidate(userPermissionsProvider);
+      // Kick background model load to warm caches without blocking UI
+      Future.microtask(() {
+        // Accessing the provider is enough to schedule its work
+        ref.read(backgroundModelLoadProvider);
+      });
+    }
+
+    if (hadToken && !hasToken) {
+      // Token was cleared/invalidated; clear model selection and caches
+      ref.read(selectedModelProvider.notifier).clear();
+      ref.invalidate(modelsProvider);
+      ref.invalidate(defaultModelProvider);
+    }
   });
 });
 

lib/core/services/socket_service.dart

@@ -288,6 +288,7 @@ class SocketService with WidgetsBindingObserver {
     final ackFn = _wrapAck(ack);
     final sessionId = _extractSessionId(map);
     final chatId = map['chat_id']?.toString();
+    final channelId = _extractChannelId(map);
 
     for (final registration in List<_ChatEventRegistration>.from(
       _chatEventHandlers.values,
@@ -298,6 +299,7 @@ class SocketService with WidgetsBindingObserver {
         chatId,
         sessionId,
         registration.requireFocus,
+        incomingChannelId: channelId,
       )) {
         continue;
       }
@@ -315,6 +317,7 @@ class SocketService with WidgetsBindingObserver {
     final ackFn = _wrapAck(ack);
     final sessionId = _extractSessionId(map);
     final chatId = map['chat_id']?.toString();
+    final channelId = _extractChannelId(map);
 
     for (final registration in List<_ChannelEventRegistration>.from(
       _channelEventHandlers.values,
@@ -325,6 +328,7 @@ class SocketService with WidgetsBindingObserver {
         chatId,
         sessionId,
         registration.requireFocus,
+        incomingChannelId: channelId,
       )) {
         continue;
       }
@@ -340,18 +344,21 @@ class SocketService with WidgetsBindingObserver {
     String? registeredSessionId,
     String? incomingConversationId,
     String? incomingSessionId,
-    bool requireFocus,
+    bool requireFocus, {
-  ) {
+    String? incomingChannelId,
-    final matchesChat =
+  }) {
+    final matchesConversation =
         registeredConversationId == null ||
         (incomingConversationId != null &&
-            registeredConversationId == incomingConversationId);
+            registeredConversationId == incomingConversationId) ||
+        (incomingChannelId != null &&
+            registeredConversationId == incomingChannelId);
     final matchesSession =
         registeredSessionId != null &&
         incomingSessionId != null &&
         registeredSessionId == incomingSessionId;
 
-    if (!matchesChat && !matchesSession) {
+    if (!matchesConversation && !matchesSession) {
       return false;
     }
 
@@ -421,6 +428,38 @@ class SocketService with WidgetsBindingObserver {
     return candidate;
   }
 
+  String? _extractChannelId(Map<String, dynamic> event) {
+    String? candidate;
+
+    if (event['channel_id'] != null) {
+      candidate = event['channel_id'].toString();
+    }
+    if (candidate == null && event['channelId'] != null) {
+      candidate = event['channelId'].toString();
+    }
+
+    final data = event['data'];
+    if (data is Map) {
+      if (candidate == null && data['channel_id'] != null) {
+        candidate = data['channel_id'].toString();
+      }
+      if (candidate == null && data['channelId'] != null) {
+        candidate = data['channelId'].toString();
+      }
+      final inner = data['data'];
+      if (inner is Map) {
+        if (candidate == null && inner['channel_id'] != null) {
+          candidate = inner['channel_id'].toString();
+        }
+        if (candidate == null && inner['channelId'] != null) {
+          candidate = inner['channelId'].toString();
+        }
+      }
+    }
+
+    return candidate;
+  }
+
   String _nextHandlerId() {
     _handlerSeed += 1;
     return _handlerSeed.toString();

lib/core/services/streaming_helper.dart

@@ -31,14 +31,12 @@ class ActiveSocketStream {
 
 /// Unified streaming helper for chat send/regenerate flows.
 ///
-/// This attaches chunked SSE streaming handlers, optional WebSocket event handlers,
+/// This attaches chunked polling streams (fallback) plus WebSocket event handlers,
 /// and manages background search/image-gen UI updates. It operates via callbacks to
 /// avoid tight coupling with provider files for easier reuse and testing.
 ActiveSocketStream attachUnifiedChunkedStreaming({
   required Stream<String> stream,
   required bool webSearchEnabled,
-  required bool isBackgroundFlow,
-  required bool suppressSocketContentInitially,
   required String assistantMessageId,
   required String modelId,
   required Map<String, dynamic> modelItem,
@@ -140,7 +138,6 @@ ActiveSocketStream attachUnifiedChunkedStreaming({
   }
 
   bool isSearching = false;
-  bool suppressSocketContent = suppressSocketContentInitially;
 
   void updateImagesFromCurrentContent() {
     try {
@@ -443,7 +440,7 @@ ActiveSocketStream attachUnifiedChunkedStreaming({
 
       if (kSocketVerboseLogging && payload is Map) {
         DebugLogger.log(
-          'socket delta type=$type suppress=$suppressSocketContent session=$sessionId message=$messageId keys=${payload.keys.toList()}',
+          'socket delta type=$type session=$sessionId message=$messageId keys=${payload.keys.toList()}',
           scope: 'socket/chat',
         );
       }
@@ -479,7 +476,7 @@ ActiveSocketStream attachUnifiedChunkedStreaming({
               }
             }
           }
-          if (!suppressSocketContent && payload.containsKey('choices')) {
+          if (payload.containsKey('choices')) {
             final choices = payload['choices'];
             if (choices is List && choices.isNotEmpty) {
               final choice = choices.first;
@@ -522,7 +519,7 @@ ActiveSocketStream attachUnifiedChunkedStreaming({
               }
             }
           }
-          if (!suppressSocketContent && payload.containsKey('content')) {
+          if (payload.containsKey('content')) {
             final raw = payload['content']?.toString() ?? '';
             if (raw.isNotEmpty) {
               replaceLastMessageContent(raw);
@@ -763,22 +760,18 @@ ActiveSocketStream attachUnifiedChunkedStreaming({
         socketWatchdog?.stop();
       } else if ((type == 'chat:message:delta' || type == 'message') &&
           payload != null) {
-        // Incremental message content over socket; respect suppression on SSE-driven flows
+        // Incremental message content over socket
-        if (!suppressSocketContent) {
+        final content = payload['content']?.toString() ?? '';
-          final content = payload['content']?.toString() ?? '';
+        if (content.isNotEmpty) {
-          if (content.isNotEmpty) {
+          appendToLastMessage(content);
-            appendToLastMessage(content);
+          updateImagesFromCurrentContent();
-            updateImagesFromCurrentContent();
-          }
         }
       } else if ((type == 'chat:message' || type == 'replace') &&
           payload != null) {
-        // Full message replacement over socket; respect suppression on SSE-driven flows
+        // Full message replacement over socket
-        if (!suppressSocketContent) {
+        final content = payload['content']?.toString() ?? '';
-          final content = payload['content']?.toString() ?? '';
+        if (content.isNotEmpty) {
-          if (content.isNotEmpty) {
+          replaceLastMessageContent(content);
-            replaceLastMessageContent(content);
-          }
         }
       } else if ((type == 'chat:message:files') && payload != null) {
         // Alias for files event used by web client
@@ -809,7 +802,6 @@ ActiveSocketStream attachUnifiedChunkedStreaming({
       } else if (type == 'request:chat:completion' && payload != null) {
         final channel = payload['channel'];
         if (channel is String && channel.isNotEmpty) {
-          suppressSocketContent = true;
           channelLineHandlerFactory(channel);
         }
       } else if (type == 'execute:tool' && payload != null) {
@@ -902,7 +894,6 @@ ActiveSocketStream attachUnifiedChunkedStreaming({
           }
         }
       } else if (type == 'event:message:delta' && payload != null) {
-        if (suppressSocketContent) return;
         final content = payload['content']?.toString() ?? '';
         if (content.isNotEmpty) {
           appendToLastMessage(content);
@@ -988,11 +979,8 @@ ActiveSocketStream attachUnifiedChunkedStreaming({
       // Unregister from persistent service
       persistentService.unregisterStream(streamId);
 
-      // Allow socket-delivered follow-ups/title updates after SSE completes
+      // If no socket subscriptions are active, treat this as a poll-driven flow
-      suppressSocketContent = false;
+      if (socketSubscriptions.isEmpty) {
-
-      // If SSE-driven (no dynamic channel/background flow), clean up sockets
-      if (!isBackgroundFlow) {
         finishStreaming();
         Future.microtask(refreshConversationSnapshot);
       }
@@ -1001,7 +989,6 @@ ActiveSocketStream attachUnifiedChunkedStreaming({
       try {
         persistentService.unregisterStream(streamId);
       } catch (_) {}
-      suppressSocketContent = false;
       disposeSocketSubscriptions();
       finishStreaming();
       Future.microtask(refreshConversationSnapshot);

lib/features/chat/providers/chat_providers.dart

@@ -1291,8 +1291,6 @@ Future<void> regenerateMessage(
     final activeStream = attachUnifiedChunkedStreaming(
       stream: stream,
       webSearchEnabled: webSearchEnabled,
-      isBackgroundFlow: isBackgroundFlow,
-      suppressSocketContentInitially: !isBackgroundFlow,
       assistantMessageId: assistantMessageId,
       modelId: selectedModel.id,
       modelItem: modelItem,
@@ -1828,8 +1826,6 @@ Future<void> _sendMessageInternal(
     final activeStream = attachUnifiedChunkedStreaming(
       stream: stream,
       webSearchEnabled: webSearchEnabled,
-      isBackgroundFlow: isBackgroundFlow,
-      suppressSocketContentInitially: !isBackgroundFlow,
       assistantMessageId: assistantMessageId,
       modelId: selectedModel.id,
       modelItem: modelItem,