Disable chat deletion

server/QMax.Api/Controllers/ChatsController.cs

@@ -274,7 +274,7 @@ public sealed class ChatsController(
     }
 
     [HttpPost("delete")]
-    public async Task<IActionResult> DeleteChats(ChatBulkActionRequest request, CancellationToken cancellationToken)
+    public IActionResult DeleteChats(ChatBulkActionRequest request)
     {
         var chatIds = request.ChatIds.Distinct().ToArray();
         if (chatIds.Length == 0)
@@ -282,30 +282,7 @@ public sealed class ChatsController(
             return BadRequest("chatIds are required.");
         }
 
-        var chats = await LoadChatsWithAttachmentsAsync(chatIds, cancellationToken);
-        if (chats.Count != chatIds.Length)
-        {
-            return NotFound();
-        }
-
-        var now = DateTimeOffset.UtcNow;
-        var files = AttachmentFiles(chats).ToArray();
-        foreach (var chat in chats)
-        {
-            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);
-        }
-
-        await db.SaveChangesAsync(cancellationToken);
-        DeleteFiles(files);
-        await hubContext.Clients.All.SendAsync("ChatListInvalidated", cancellationToken);
-        return NoContent();
+        return BadRequest("Chat deletion is disabled because MAX does not remove chats from the web client.");
     }
 
     [HttpGet("{chatId:guid}/search")]