diff --git a/android/app/src/main/java/xyz/kusoft/qmax/core/QMaxRepository.kt b/android/app/src/main/java/xyz/kusoft/qmax/core/QMaxRepository.kt
index 9f09bd9..da8bcd7 100644
--- a/android/app/src/main/java/xyz/kusoft/qmax/core/QMaxRepository.kt
+++ b/android/app/src/main/java/xyz/kusoft/qmax/core/QMaxRepository.kt
@@ -122,9 +122,6 @@ class QMaxRepository(
             return
         }
 
-        withFreshSession(session) {
-            api.clearChatHistories(it.serverUrl, it.accessToken, ids)
-        }
         messageCache.clearMessages(session, ids)
         val updatedChats = cachedChats(session).map { chat ->
             if (chat.id in ids) {
@@ -134,6 +131,9 @@ class QMaxRepository(
             }
         }
         messageCache.saveChats(session, orderedChats(updatedChats))
+        withFreshSession(session) {
+            api.clearChatHistories(it.serverUrl, it.accessToken, ids)
+        }
     }
 
     suspend fun deleteChats(session: QMaxSession, chatIds: Collection<String>) {
@@ -142,12 +142,12 @@ class QMaxRepository(
             return
         }
 
-        withFreshSession(session) {
-            api.deleteChats(it.serverUrl, it.accessToken, ids)
-        }
         messageCache.clearMessages(session, ids)
         val updatedChats = cachedChats(session).filterNot { it.id in ids }
         messageCache.saveChats(session, orderedChats(updatedChats))
+        withFreshSession(session) {
+            api.deleteChats(it.serverUrl, it.accessToken, ids)
+        }
     }
 
     suspend fun searchMessages(session: QMaxSession, chatId: String, query: String): List<MessageDto> {
diff --git a/android/app/src/main/java/xyz/kusoft/qmax/ui/QMaxViewModel.kt b/android/app/src/main/java/xyz/kusoft/qmax/ui/QMaxViewModel.kt
index 2c31d0c..76dc453 100644
--- a/android/app/src/main/java/xyz/kusoft/qmax/ui/QMaxViewModel.kt
+++ b/android/app/src/main/java/xyz/kusoft/qmax/ui/QMaxViewModel.kt
@@ -401,7 +401,6 @@ class QMaxViewModel(private val repository: QMaxRepository) : ViewModel() {
         val ids = state.value.selectedChatIds
         if (ids.isEmpty()) return@launchLoading
 
-        repository.clearChatHistories(session, ids)
         val updatedChats = normalizeChats(
             state.value.chats.map { chat ->
                 if (chat.id in ids) {
@@ -422,6 +421,7 @@ class QMaxViewModel(private val repository: QMaxRepository) : ViewModel() {
             selectedChatIds = emptySet()
         )
         persistCurrentChats()
+        repository.clearChatHistories(session, ids)
         refreshChats(showLoading = false)
     }
 
@@ -430,7 +430,6 @@ class QMaxViewModel(private val repository: QMaxRepository) : ViewModel() {
         val ids = state.value.selectedChatIds
         if (ids.isEmpty()) return@launchLoading
 
-        repository.deleteChats(session, ids)
         val selectedChatId = state.value.selectedChat?.id
         val selectedChatDeleted = selectedChatId != null && selectedChatId in ids
         val updatedChats = normalizeChats(state.value.chats.filterNot { it.id in ids })
@@ -451,6 +450,7 @@ class QMaxViewModel(private val repository: QMaxRepository) : ViewModel() {
             realtime.joinChat(null)
         }
         persistCurrentChats()
+        repository.deleteChats(session, ids)
         refreshChats(showLoading = false)
     }
 
diff --git a/server/QMax.Api/Controllers/ChatsController.cs b/server/QMax.Api/Controllers/ChatsController.cs
index 1a9ca47..7cf77f3 100644
--- a/server/QMax.Api/Controllers/ChatsController.cs
+++ b/server/QMax.Api/Controllers/ChatsController.cs
@@ -26,7 +26,9 @@ public sealed class ChatsController(
     [HttpGet]
     public async Task<ActionResult<IReadOnlyList<ChatDto>>> GetChats(CancellationToken cancellationToken)
     {
-        var chats = (await db.Chats.ToArrayAsync(cancellationToken))
+        var chats = (await db.Chats
+                .Where(x => x.DeletedAt == null)
+                .ToArrayAsync(cancellationToken))
             .OrderByDescending(x => x.IsPinned)
             .ThenByDescending(x => x.UnreadCount > 0)
             .ThenByDescending(x => x.LastMessageAt ?? x.UpdatedAt)
@@ -59,7 +61,7 @@ public sealed class ChatsController(
     [HttpGet("{chatId:guid}/messages")]
     public async Task<ActionResult<IReadOnlyList<MessageDto>>> GetMessages(Guid chatId, int take = 80, DateTimeOffset? before = null, CancellationToken cancellationToken = default)
     {
-        var chat = await db.Chats.FirstOrDefaultAsync(x => x.Id == chatId, cancellationToken);
+        var chat = await db.Chats.FirstOrDefaultAsync(x => x.Id == chatId && x.DeletedAt == null, cancellationToken);
         if (chat is null)
         {
             return NotFound();
@@ -69,7 +71,7 @@ public sealed class ChatsController(
         {
             await syncService.SyncChatHistoryAsync(chat.ExternalId, chat.WebUrl, cancellationToken);
             db.ChangeTracker.Clear();
-            chat = await db.Chats.FirstOrDefaultAsync(x => x.Id == chatId, cancellationToken);
+            chat = await db.Chats.FirstOrDefaultAsync(x => x.Id == chatId && x.DeletedAt == null, cancellationToken);
             if (chat is null)
             {
                 return NotFound();
@@ -104,7 +106,7 @@ public sealed class ChatsController(
     [HttpPost("{chatId:guid}/read")]
     public async Task<IActionResult> MarkRead(Guid chatId, CancellationToken cancellationToken)
     {
-        var chat = await db.Chats.FirstOrDefaultAsync(x => x.Id == chatId, cancellationToken);
+        var chat = await db.Chats.FirstOrDefaultAsync(x => x.Id == chatId && x.DeletedAt == null, cancellationToken);
         if (chat is null)
         {
             return NotFound();
@@ -136,19 +138,7 @@ public sealed class ChatsController(
             return NotFound();
         }
 
-        foreach (var chat in chats)
-        {
-            var maxFailure = await TryApplyMaxChatActionAsync(
-                chat,
-                (externalChatId, chatUrl) => maxBridge.ClearChatHistoryAsync(externalChatId, chatUrl, cancellationToken),
-                "clear history",
-                cancellationToken);
-            if (maxFailure is not null)
-            {
-                return maxFailure;
-            }
-        }
-
+        var now = DateTimeOffset.UtcNow;
         var files = AttachmentFiles(chats).ToArray();
         foreach (var chat in chats)
         {
@@ -156,7 +146,12 @@ public sealed class ChatsController(
             chat.LastMessageAt = null;
             chat.LastMessagePreview = null;
             chat.UnreadCount = 0;
-            chat.UpdatedAt = DateTimeOffset.UtcNow;
+            chat.HistoryClearedAt = now;
+            chat.UpdatedAt = now;
+            if (chat.DeletedAt is null)
+            {
+                QueuePendingMaxAction(chat, ChatPendingMaxAction.ClearHistory, now);
+            }
         }
 
         await db.SaveChangesAsync(cancellationToken);
@@ -180,21 +175,20 @@ public sealed class ChatsController(
             return NotFound();
         }
 
+        var now = DateTimeOffset.UtcNow;
+        var files = AttachmentFiles(chats).ToArray();
         foreach (var chat in chats)
         {
-            var maxFailure = await TryApplyMaxChatActionAsync(
-                chat,
-                (externalChatId, chatUrl) => maxBridge.DeleteChatAsync(externalChatId, chatUrl, cancellationToken),
-                "delete chat",
-                cancellationToken);
-            if (maxFailure is not null)
-            {
-                return maxFailure;
-            }
+            db.Messages.RemoveRange(chat.Messages);
+            chat.DeletedAt ??= now;
+            chat.HistoryClearedAt = now;
+            chat.LastMessageAt = null;
+            chat.LastMessagePreview = null;
+            chat.UnreadCount = 0;
+            chat.UpdatedAt = now;
+            QueuePendingMaxAction(chat, ChatPendingMaxAction.DeleteChat, now);
         }
 
-        var files = AttachmentFiles(chats).ToArray();
-        db.Chats.RemoveRange(chats);
         await db.SaveChangesAsync(cancellationToken);
         DeleteFiles(files);
         await hubContext.Clients.All.SendAsync("ChatListInvalidated", cancellationToken);
@@ -214,7 +208,7 @@ public sealed class ChatsController(
             return BadRequest("Search query is required.");
         }
 
-        var chatExists = await db.Chats.AnyAsync(x => x.Id == chatId, cancellationToken);
+        var chatExists = await db.Chats.AnyAsync(x => x.Id == chatId && x.DeletedAt == null, cancellationToken);
         if (!chatExists)
         {
             return NotFound();
@@ -242,7 +236,7 @@ public sealed class ChatsController(
     {
         var chat = await db.Chats
             .AsNoTracking()
-            .FirstOrDefaultAsync(x => x.Id == chatId, cancellationToken);
+            .FirstOrDefaultAsync(x => x.Id == chatId && x.DeletedAt == null, cancellationToken);
 
         if (chat is null || string.IsNullOrWhiteSpace(chat.AvatarUrl))
         {
@@ -263,7 +257,7 @@ public sealed class ChatsController(
     {
         var chat = await db.Chats
             .AsNoTracking()
-            .FirstOrDefaultAsync(x => x.Id == chatId, cancellationToken);
+            .FirstOrDefaultAsync(x => x.Id == chatId && x.DeletedAt == null, cancellationToken);
 
         if (chat is null)
         {
@@ -285,7 +279,7 @@ public sealed class ChatsController(
     [HttpPost("{chatId:guid}/messages")]
     public async Task<ActionResult<MessageDto>> SendMessage(Guid chatId, SendMessageRequest request, CancellationToken cancellationToken)
     {
-        var chat = await db.Chats.FindAsync([chatId], cancellationToken);
+        var chat = await db.Chats.FirstOrDefaultAsync(x => x.Id == chatId && x.DeletedAt == null, cancellationToken);
         if (chat is null)
         {
             return NotFound();
@@ -527,7 +521,7 @@ public sealed class ChatsController(
             return NotFound();
         }
 
-        var target = await db.Chats.FindAsync([request.TargetChatId], cancellationToken);
+        var target = await db.Chats.FirstOrDefaultAsync(x => x.Id == request.TargetChatId && x.DeletedAt == null, cancellationToken);
         if (target is null)
         {
             return NotFound();
@@ -600,7 +594,7 @@ public sealed class ChatsController(
         [FromForm] Guid? replyToMessageId,
         CancellationToken cancellationToken)
     {
-        var chat = await db.Chats.FindAsync([chatId], cancellationToken);
+        var chat = await db.Chats.FirstOrDefaultAsync(x => x.Id == chatId && x.DeletedAt == null, cancellationToken);
         if (chat is null)
         {
             return NotFound();
@@ -809,6 +803,15 @@ public sealed class ChatsController(
             error?.Contains("menu was not opened", StringComparison.OrdinalIgnoreCase) == true;
     }
 
+    private static void QueuePendingMaxAction(Chat chat, ChatPendingMaxAction action, DateTimeOffset requestedAt)
+    {
+        chat.PendingMaxAction = action;
+        chat.PendingMaxActionRequestedAt = requestedAt;
+        chat.PendingMaxActionLastAttemptAt = null;
+        chat.PendingMaxActionAttempts = 0;
+        chat.PendingMaxActionError = null;
+    }
+
     private async Task<List<Chat>> LoadChatsWithAttachmentsAsync(IReadOnlyCollection<Guid> chatIds, CancellationToken cancellationToken)
     {
         return await db.Chats
diff --git a/server/QMax.Api/Data/Entities/Chat.cs b/server/QMax.Api/Data/Entities/Chat.cs
index c0970d4..c721c8c 100644
--- a/server/QMax.Api/Data/Entities/Chat.cs
+++ b/server/QMax.Api/Data/Entities/Chat.cs
@@ -14,6 +14,13 @@ public sealed class Chat
     public bool IsPinned { get; set; }
     public bool IsMuted { get; set; }
     public bool IsArchived { get; set; }
+    public DateTimeOffset? DeletedAt { get; set; }
+    public DateTimeOffset? HistoryClearedAt { get; set; }
+    public ChatPendingMaxAction? PendingMaxAction { get; set; }
+    public DateTimeOffset? PendingMaxActionRequestedAt { get; set; }
+    public DateTimeOffset? PendingMaxActionLastAttemptAt { get; set; }
+    public int PendingMaxActionAttempts { get; set; }
+    public string? PendingMaxActionError { get; set; }
     public DateTimeOffset CreatedAt { get; set; } = DateTimeOffset.UtcNow;
     public DateTimeOffset UpdatedAt { get; set; } = DateTimeOffset.UtcNow;
     public ICollection<Message> Messages { get; set; } = new List<Message>();
diff --git a/server/QMax.Api/Data/Entities/Enums.cs b/server/QMax.Api/Data/Entities/Enums.cs
index 47bd166..c478c0c 100644
--- a/server/QMax.Api/Data/Entities/Enums.cs
+++ b/server/QMax.Api/Data/Entities/Enums.cs
@@ -8,6 +8,12 @@ public enum ChatKind
     MaxDialog = 3
 }
 
+public enum ChatPendingMaxAction
+{
+    ClearHistory = 0,
+    DeleteChat = 1
+}
+
 public enum MessageDirection
 {
     Incoming = 0,
diff --git a/server/QMax.Api/Data/QMaxDbContext.cs b/server/QMax.Api/Data/QMaxDbContext.cs
index 218b976..b12354c 100644
--- a/server/QMax.Api/Data/QMaxDbContext.cs
+++ b/server/QMax.Api/Data/QMaxDbContext.cs
@@ -19,6 +19,8 @@ public sealed class QMaxDbContext(DbContextOptions<QMaxDbContext> options) : DbC
         modelBuilder.Entity<User>().HasIndex(x => x.PhoneNumber);
         modelBuilder.Entity<UserSession>().HasIndex(x => x.RefreshTokenHash).IsUnique();
         modelBuilder.Entity<Chat>().HasIndex(x => x.ExternalId).IsUnique();
+        modelBuilder.Entity<Chat>().HasIndex(x => x.DeletedAt);
+        modelBuilder.Entity<Chat>().HasIndex(x => new { x.PendingMaxAction, x.PendingMaxActionRequestedAt });
         modelBuilder.Entity<Message>().HasIndex(x => new { x.ChatId, x.SentAt });
         modelBuilder.Entity<Message>().HasIndex(x => x.ExternalId);
         modelBuilder.Entity<MessageAttachment>().HasIndex(x => x.StorageFileName).IsUnique();
@@ -30,6 +32,10 @@ public sealed class QMaxDbContext(DbContextOptions<QMaxDbContext> options) : DbC
             .Property(x => x.Kind)
             .HasConversion<string>();
 
+        modelBuilder.Entity<Chat>()
+            .Property(x => x.PendingMaxAction)
+            .HasConversion<string>();
+
         modelBuilder.Entity<Message>()
             .Property(x => x.Direction)
             .HasConversion<string>();
diff --git a/server/QMax.Api/Program.cs b/server/QMax.Api/Program.cs
index df28399..23bed3a 100644
--- a/server/QMax.Api/Program.cs
+++ b/server/QMax.Api/Program.cs
@@ -157,6 +157,41 @@ static async Task EnsureCompatibilitySchemaAsync(QMaxDbContext db)
         await db.Database.ExecuteSqlRawAsync("ALTER TABLE Chats ADD COLUMN WebUrl TEXT;");
     }
 
+    if (!chatColumns.Contains("DeletedAt"))
+    {
+        await db.Database.ExecuteSqlRawAsync("ALTER TABLE Chats ADD COLUMN DeletedAt TEXT;");
+    }
+
+    if (!chatColumns.Contains("HistoryClearedAt"))
+    {
+        await db.Database.ExecuteSqlRawAsync("ALTER TABLE Chats ADD COLUMN HistoryClearedAt TEXT;");
+    }
+
+    if (!chatColumns.Contains("PendingMaxAction"))
+    {
+        await db.Database.ExecuteSqlRawAsync("ALTER TABLE Chats ADD COLUMN PendingMaxAction TEXT;");
+    }
+
+    if (!chatColumns.Contains("PendingMaxActionRequestedAt"))
+    {
+        await db.Database.ExecuteSqlRawAsync("ALTER TABLE Chats ADD COLUMN PendingMaxActionRequestedAt TEXT;");
+    }
+
+    if (!chatColumns.Contains("PendingMaxActionLastAttemptAt"))
+    {
+        await db.Database.ExecuteSqlRawAsync("ALTER TABLE Chats ADD COLUMN PendingMaxActionLastAttemptAt TEXT;");
+    }
+
+    if (!chatColumns.Contains("PendingMaxActionAttempts"))
+    {
+        await db.Database.ExecuteSqlRawAsync("ALTER TABLE Chats ADD COLUMN PendingMaxActionAttempts INTEGER NOT NULL DEFAULT 0;");
+    }
+
+    if (!chatColumns.Contains("PendingMaxActionError"))
+    {
+        await db.Database.ExecuteSqlRawAsync("ALTER TABLE Chats ADD COLUMN PendingMaxActionError TEXT;");
+    }
+
     var attachmentColumns = new HashSet<string>(StringComparer.OrdinalIgnoreCase);
     await using (var command = connection.CreateCommand())
     {
@@ -189,6 +224,16 @@ static async Task EnsureCompatibilitySchemaAsync(QMaxDbContext db)
         WHERE ExternalId IS NOT NULL AND ExternalId <> '';
         """);
 
+    await db.Database.ExecuteSqlRawAsync("""
+        CREATE INDEX IF NOT EXISTS IX_Chats_DeletedAt
+        ON Chats (DeletedAt);
+        """);
+
+    await db.Database.ExecuteSqlRawAsync("""
+        CREATE INDEX IF NOT EXISTS IX_Chats_PendingMaxAction_PendingMaxActionRequestedAt
+        ON Chats (PendingMaxAction, PendingMaxActionRequestedAt);
+        """);
+
     await db.Database.ExecuteSqlRawAsync("""
         CREATE INDEX IF NOT EXISTS IX_Messages_ChatId_ExternalId
         ON Messages (ChatId, ExternalId);
diff --git a/server/QMax.Api/Services/MaxBridgeSyncService.cs b/server/QMax.Api/Services/MaxBridgeSyncService.cs
index fa319f0..8dd06a6 100644
--- a/server/QMax.Api/Services/MaxBridgeSyncService.cs
+++ b/server/QMax.Api/Services/MaxBridgeSyncService.cs
@@ -89,6 +89,12 @@ public sealed class MaxBridgeSyncService(
                 }
             }
 
+            if (chat?.DeletedAt is not null)
+            {
+                trackedChatsByExternalId[update.ExternalId] = chat;
+                continue;
+            }
+
             var chatWasCreated = chat is null;
             if (chat is null)
             {
@@ -189,6 +195,11 @@ public sealed class MaxBridgeSyncService(
                     continue;
                 }
 
+                if (chat.HistoryClearedAt is { } historyClearedAt && incoming.SentAt <= historyClearedAt)
+                {
+                    continue;
+                }
+
                 if (IsPresencePreview(incoming.Text) && (incoming.Attachments?.Count ?? 0) == 0)
                 {
                     continue;
@@ -347,6 +358,11 @@ public sealed class MaxBridgeSyncService(
         var previousPreview = chat.LastMessagePreview;
         var previousPreviewAt = chat.LastMessageAt;
         var previewAt = ResolveListPreviewAt(update, previousPreviewAt ?? chat.UpdatedAt);
+        if (chat.HistoryClearedAt is { } historyClearedAt && previewAt <= historyClearedAt)
+        {
+            return false;
+        }
+
         var samePreview = string.Equals(previousPreview, preview, StringComparison.Ordinal);
         var samePreviewAt = previousPreviewAt is not null &&
             Math.Abs((previousPreviewAt.Value - previewAt).TotalSeconds) < 1;
diff --git a/server/QMax.Api/Services/MaxOutboxService.cs b/server/QMax.Api/Services/MaxOutboxService.cs
index 09cc7a5..d52d2b0 100644
--- a/server/QMax.Api/Services/MaxOutboxService.cs
+++ b/server/QMax.Api/Services/MaxOutboxService.cs
@@ -18,6 +18,8 @@ public sealed class MaxOutboxService(
 {
     public async Task<int> ProcessOnceAsync(CancellationToken cancellationToken)
     {
+        var processed = await ProcessPendingChatActionsAsync(cancellationToken);
+
         var candidates = await db.Messages
             .Include(message => message.Chat)
             .Include(message => message.Attachments)
@@ -25,6 +27,8 @@ public sealed class MaxOutboxService(
             .Where(message =>
                 message.Direction == MessageDirection.Outgoing &&
                 message.DeliveryState == MessageDeliveryState.Sending &&
+                message.Chat != null &&
+                message.Chat.DeletedAt == null &&
                 message.DeletedAt == null)
             .ToListAsync(cancellationToken);
 
@@ -34,7 +38,6 @@ public sealed class MaxOutboxService(
             .Take(10)
             .ToArray();
 
-        var processed = 0;
         foreach (var message in pending)
         {
             cancellationToken.ThrowIfCancellationRequested();
@@ -47,6 +50,147 @@ public sealed class MaxOutboxService(
         return processed;
     }
 
+    private async Task<int> ProcessPendingChatActionsAsync(CancellationToken cancellationToken)
+    {
+        var pending = await db.Chats
+            .Where(chat => chat.PendingMaxAction != null)
+            .ToListAsync(cancellationToken);
+        pending = pending
+            .OrderBy(chat => chat.PendingMaxActionRequestedAt ?? chat.UpdatedAt)
+            .ThenBy(chat => chat.Id)
+            .Take(10)
+            .ToList();
+
+        var processed = 0;
+        foreach (var chat in pending)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+            if (await ProcessChatActionAsync(chat, cancellationToken))
+            {
+                processed++;
+            }
+        }
+
+        return processed;
+    }
+
+    private async Task<bool> ProcessChatActionAsync(Chat chat, CancellationToken cancellationToken)
+    {
+        var pendingAction = chat.PendingMaxAction;
+        if (pendingAction is null)
+        {
+            return false;
+        }
+
+        MaxActionResult result;
+        try
+        {
+            result = pendingAction.Value switch
+            {
+                ChatPendingMaxAction.ClearHistory => await ApplyMaxChatActionAsync(
+                    chat,
+                    (externalChatId, chatUrl) => maxBridge.ClearChatHistoryAsync(externalChatId, chatUrl, cancellationToken),
+                    cancellationToken),
+                ChatPendingMaxAction.DeleteChat => await ApplyMaxChatActionAsync(
+                    chat,
+                    (externalChatId, chatUrl) => maxBridge.DeleteChatAsync(externalChatId, chatUrl, cancellationToken),
+                    cancellationToken),
+                _ => new MaxActionResult(false, $"Unsupported chat action: {pendingAction.Value}.")
+            };
+        }
+        catch (Exception ex)
+        {
+            logger.LogWarning(ex, "MAX chat action {Action} failed for chat {ChatId}.", pendingAction.Value, chat.Id);
+            result = new MaxActionResult(false, ex.Message);
+        }
+
+        var now = DateTimeOffset.UtcNow;
+        chat.PendingMaxActionLastAttemptAt = now;
+        if (result.Success)
+        {
+            chat.PendingMaxAction = null;
+            chat.PendingMaxActionRequestedAt = null;
+            chat.PendingMaxActionError = null;
+        }
+        else
+        {
+            chat.PendingMaxActionAttempts++;
+            chat.PendingMaxActionError = result.Error ?? $"MAX chat action {pendingAction.Value} failed.";
+        }
+
+        chat.UpdatedAt = now;
+        await db.SaveChangesAsync(cancellationToken);
+        if (!result.Success)
+        {
+            logger.LogWarning(
+                "MAX chat action {Action} failed for chat {ChatId}: {Error}",
+                pendingAction.Value,
+                chat.Id,
+                chat.PendingMaxActionError);
+        }
+
+        return true;
+    }
+
+    private async Task<MaxActionResult> ApplyMaxChatActionAsync(
+        Chat chat,
+        Func<string, string?, Task<MaxActionResult>> action,
+        CancellationToken cancellationToken)
+    {
+        if (string.IsNullOrWhiteSpace(chat.ExternalId))
+        {
+            return new MaxActionResult(true, null);
+        }
+
+        var chatUrl = chat.WebUrl;
+        if (string.IsNullOrWhiteSpace(chatUrl))
+        {
+            chatUrl = await ResolveAndPersistChatUrlAsync(chat, cancellationToken);
+        }
+
+        var result = await action(chat.ExternalId, chatUrl);
+        if (!result.Success && IsChatOpenFailure(result.Error))
+        {
+            var previousUrl = chatUrl;
+            chatUrl = await ResolveAndPersistChatUrlAsync(chat, cancellationToken);
+            if (!string.IsNullOrWhiteSpace(chatUrl) &&
+                !string.Equals(previousUrl, chatUrl, StringComparison.Ordinal))
+            {
+                result = await action(chat.ExternalId, chatUrl);
+            }
+        }
+
+        return result;
+    }
+
+    private async Task<string?> ResolveAndPersistChatUrlAsync(Chat chat, CancellationToken cancellationToken)
+    {
+        if (string.IsNullOrWhiteSpace(chat.ExternalId))
+        {
+            return chat.WebUrl;
+        }
+
+        var result = await maxBridge.ResolveChatUrlAsync(chat.ExternalId, cancellationToken);
+        if (!result.Success || string.IsNullOrWhiteSpace(result.ChatUrl))
+        {
+            return chat.WebUrl;
+        }
+
+        var nextWebUrl = result.ChatUrl.Trim();
+        if (!string.Equals(chat.WebUrl, nextWebUrl, StringComparison.Ordinal))
+        {
+            chat.WebUrl = nextWebUrl;
+        }
+
+        return chat.WebUrl;
+    }
+
+    private static bool IsChatOpenFailure(string? error)
+    {
+        return error?.Contains("not found or did not open", StringComparison.OrdinalIgnoreCase) == true ||
+            error?.Contains("menu was not opened", StringComparison.OrdinalIgnoreCase) == true;
+    }
+
     private async Task<bool> ProcessMessageAsync(Message message, CancellationToken cancellationToken)
     {
         var chat = message.Chat;
diff --git a/tests/QMax.Tests/ApiSmokeTests.cs b/tests/QMax.Tests/ApiSmokeTests.cs
index 18e4351..6a12404 100644
--- a/tests/QMax.Tests/ApiSmokeTests.cs
+++ b/tests/QMax.Tests/ApiSmokeTests.cs
@@ -654,7 +654,7 @@ public sealed class ApiSmokeTests : IDisposable
     }
 
     [Fact]
-    public async Task BulkDeleteResolvesMissingChatUrlBeforeMaxAction()
+    public async Task BulkDeleteQueuesMaxActionAndOutboxDeletesWithChatUrl()
     {
         var bridge = new ResolvingDeleteMaxBridgeClient();
         using var factory = _factory.WithWebHostBuilder(builder =>
@@ -675,15 +675,36 @@ public sealed class ApiSmokeTests : IDisposable
             JsonOptions);
         await AssertStatusAsync(HttpStatusCode.NoContent, response);
 
-        Assert.Equal("missing-url-chat", bridge.ResolvedExternalId);
-        Assert.Equal("https://max.test/chat/missing-url-chat", bridge.DeleteChatUrl);
+        Assert.Null(bridge.ResolvedExternalId);
+        Assert.Empty(bridge.DeleteChatUrls);
+
+        await using (var scope = factory.Services.CreateAsyncScope())
+        {
+            var db = scope.ServiceProvider.GetRequiredService<QMaxDbContext>();
+            var stored = await db.Chats.SingleAsync(x => x.Id == chat.Id);
+            Assert.NotNull(stored.DeletedAt);
+            Assert.Equal(ChatPendingMaxAction.DeleteChat, stored.PendingMaxAction);
+            Assert.NotNull(stored.PendingMaxActionRequestedAt);
+        }
 
         var chats = await client.GetFromJsonAsync<ChatDto[]>("/api/chats", JsonOptions);
         Assert.DoesNotContain(chats!, x => x.Id == chat.Id);
+
+        Assert.True(await ProcessOutboxAsync(factory) >= 1);
+        Assert.Equal("https://max.test/chat/missing-url-chat", bridge.DeleteChatUrl);
+
+        await using (var scope = factory.Services.CreateAsyncScope())
+        {
+            var db = scope.ServiceProvider.GetRequiredService<QMaxDbContext>();
+            var stored = await db.Chats.SingleAsync(x => x.Id == chat.Id);
+            Assert.Null(stored.PendingMaxAction);
+            Assert.Equal("https://max.test/chat/missing-url-chat", stored.WebUrl);
+            Assert.NotNull(stored.DeletedAt);
+        }
     }
 
     [Fact]
-    public async Task BulkDeleteRefreshesStaleChatUrlAfterMenuOpenFailure()
+    public async Task BulkDeleteOutboxRefreshesStaleChatUrlAfterMenuOpenFailure()
     {
         const string externalId = "stale-menu-url-chat";
         const string staleUrl = "https://max.test/chat/wrong-chat";
@@ -714,11 +735,144 @@ public sealed class ApiSmokeTests : IDisposable
             JsonOptions);
         await AssertStatusAsync(HttpStatusCode.NoContent, response);
 
+        Assert.Empty(bridge.DeleteChatUrls);
+
+        Assert.True(await ProcessOutboxAsync(factory) >= 1);
         Assert.Equal(externalId, bridge.ResolvedExternalId);
         Assert.Equal([staleUrl, $"https://max.test/chat/{externalId}"], bridge.DeleteChatUrls);
 
         var chats = await client.GetFromJsonAsync<ChatDto[]>("/api/chats", JsonOptions);
         Assert.DoesNotContain(chats!, x => x.Id == chat.Id);
+
+        await using (var scope = factory.Services.CreateAsyncScope())
+        {
+            var db = scope.ServiceProvider.GetRequiredService<QMaxDbContext>();
+            var stored = await db.Chats.SingleAsync(x => x.Id == chat.Id);
+            Assert.Null(stored.PendingMaxAction);
+            Assert.Equal($"https://max.test/chat/{externalId}", stored.WebUrl);
+        }
+    }
+
+    [Fact]
+    public async Task BulkClearHistoryQueuesMaxActionAndClearsLocalMessages()
+    {
+        const string externalId = "clear-history-chat";
+        var bridge = new ResolvingDeleteMaxBridgeClient();
+        using var factory = _factory.WithWebHostBuilder(builder =>
+        {
+            builder.ConfigureServices(services =>
+            {
+                services.RemoveAll<IMaxBridgeClient>();
+                services.AddSingleton<IMaxBridgeClient>(bridge);
+            });
+        });
+        using var client = factory.CreateClient();
+        await LoginAsync(client);
+
+        var chat = await CreateDirectChatAsync(client, externalId, "Clear History");
+        var messageResponse = await client.PostAsJsonAsync(
+            $"/api/chats/{chat.Id}/messages",
+            new SendMessageRequest("local message before clear"),
+            JsonOptions);
+        await AssertStatusAsync(HttpStatusCode.OK, messageResponse);
+
+        var response = await client.PostAsJsonAsync(
+            "/api/chats/clear-history",
+            new ChatBulkActionRequest([chat.Id]),
+            JsonOptions);
+        await AssertStatusAsync(HttpStatusCode.NoContent, response);
+
+        Assert.Empty(bridge.ClearChatUrls);
+        var messages = await client.GetFromJsonAsync<MessageDto[]>($"/api/chats/{chat.Id}/messages", JsonOptions);
+        Assert.Empty(messages!);
+
+        await using (var scope = factory.Services.CreateAsyncScope())
+        {
+            var db = scope.ServiceProvider.GetRequiredService<QMaxDbContext>();
+            var stored = await db.Chats.SingleAsync(x => x.Id == chat.Id);
+            Assert.Null(stored.DeletedAt);
+            Assert.NotNull(stored.HistoryClearedAt);
+            Assert.Null(stored.LastMessagePreview);
+            Assert.Equal(ChatPendingMaxAction.ClearHistory, stored.PendingMaxAction);
+        }
+
+        Assert.True(await ProcessOutboxAsync(factory) >= 1);
+        Assert.Equal($"https://max.test/chat/{externalId}", bridge.ClearChatUrl);
+
+        await using (var scope = factory.Services.CreateAsyncScope())
+        {
+            var db = scope.ServiceProvider.GetRequiredService<QMaxDbContext>();
+            var stored = await db.Chats.SingleAsync(x => x.Id == chat.Id);
+            Assert.Null(stored.PendingMaxAction);
+            Assert.Equal($"https://max.test/chat/{externalId}", stored.WebUrl);
+        }
+    }
+
+    [Fact]
+    public async Task SyncDoesNotRecreateLocallyDeletedChat()
+    {
+        const string externalId = "deleted-sync-chat";
+        var sentAt = DateTimeOffset.UtcNow;
+        var bridge = new ResolvingDeleteMaxBridgeClient
+        {
+            Updates =
+            [
+                new MaxChatUpdate(
+                    externalId,
+                    "Deleted Remote",
+                    null,
+                    sentAt,
+                    [
+                        new MaxMessageUpdate(
+                            "deleted-sync-message",
+                            "remote-user",
+                            "Deleted Remote",
+                            false,
+                            "remote hello after delete",
+                            sentAt)
+                    ],
+                    "remote hello after delete",
+                    false,
+                    sentAt,
+                    sentAt.ToOffset(TimeSpan.FromHours(3)).ToString("HH:mm"),
+                    $"https://max.test/chat/{externalId}")
+            ]
+        };
+        using var factory = _factory.WithWebHostBuilder(builder =>
+        {
+            builder.ConfigureTestServices(services =>
+            {
+                services.RemoveAll<IHostedService>();
+                services.RemoveAll<IMaxBridgeClient>();
+                services.AddSingleton<IMaxBridgeClient>(bridge);
+            });
+        });
+        using var client = factory.CreateClient();
+        await LoginAsync(client);
+
+        var chat = await CreateDirectChatAsync(client, externalId, "Deleted Remote");
+        var deleteResponse = await client.PostAsJsonAsync(
+            "/api/chats/delete",
+            new ChatBulkActionRequest([chat.Id]),
+            JsonOptions);
+        await AssertStatusAsync(HttpStatusCode.NoContent, deleteResponse);
+
+        var sync = await client.PostAsync("/api/max/sync", null);
+        await AssertStatusAsync(HttpStatusCode.OK, sync);
+
+        var chats = await client.GetFromJsonAsync<ChatDto[]>("/api/chats", JsonOptions);
+        Assert.DoesNotContain(chats!, x => x.ExternalId == externalId);
+
+        await using var scope = factory.Services.CreateAsyncScope();
+        var db = scope.ServiceProvider.GetRequiredService<QMaxDbContext>();
+        var stored = await db.Chats.Include(x => x.Messages).SingleAsync(x => x.Id == chat.Id);
+        Assert.NotNull(stored.DeletedAt);
+        Assert.Empty(stored.Messages);
+        stored.PendingMaxAction = null;
+        stored.PendingMaxActionRequestedAt = null;
+        stored.PendingMaxActionLastAttemptAt = null;
+        stored.PendingMaxActionError = null;
+        await db.SaveChangesAsync();
     }
 
     [Fact]
@@ -1506,6 +1660,9 @@ public sealed class ApiSmokeTests : IDisposable
         public string? ResolvedExternalId { get; private set; }
         public string? DeleteChatUrl { get; private set; }
         public List<string?> DeleteChatUrls { get; } = [];
+        public string? ClearChatUrl { get; private set; }
+        public List<string?> ClearChatUrls { get; } = [];
+        public IReadOnlyList<MaxChatUpdate> Updates { get; set; } = [];
 
         public Task<MaxBridgeStatus> GetStatusAsync(CancellationToken cancellationToken)
         {
@@ -1529,7 +1686,7 @@ public sealed class ApiSmokeTests : IDisposable
 
         public Task<IReadOnlyList<MaxChatUpdate>> FetchUpdatesAsync(CancellationToken cancellationToken)
         {
-            return Task.FromResult<IReadOnlyList<MaxChatUpdate>>(Array.Empty<MaxChatUpdate>());
+            return Task.FromResult(Updates);
         }
 
         public Task<MaxChatUpdate?> FetchChatHistoryAsync(string externalChatId, string? chatUrl, CancellationToken cancellationToken)
@@ -1550,7 +1707,16 @@ public sealed class ApiSmokeTests : IDisposable
 
         public Task<MaxActionResult> ClearChatHistoryAsync(string externalChatId, string? chatUrl, CancellationToken cancellationToken)
         {
-            return Task.FromResult(new MaxActionResult(true, null));
+            ClearChatUrls.Add(chatUrl);
+            ClearChatUrl = chatUrl;
+            if (string.Equals(chatUrl, _staleUrlToReject, StringComparison.Ordinal))
+            {
+                return Task.FromResult(new MaxActionResult(false, "MAX chat menu was not opened."));
+            }
+
+            return Task.FromResult(string.IsNullOrWhiteSpace(chatUrl)
+                ? new MaxActionResult(false, "MAX chat was not found or did not open.")
+                : new MaxActionResult(true, null));
         }
 
         public Task<MaxActionResult> DeleteChatAsync(string externalChatId, string? chatUrl, CancellationToken cancellationToken)