Добавьте файлы проекта.

src/Massenger.Client/ViewModels/ChatsViewModel.cs

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+using System.Collections.ObjectModel;
+using CommunityToolkit.Mvvm.ComponentModel;
+using CommunityToolkit.Mvvm.Input;
+using Massenger.Client.Pages;
+using Massenger.Client.Services;
+using Massenger.Shared;
+
+namespace Massenger.Client.ViewModels;
+
+public partial class ChatsViewModel(ApiClient apiClient, RealtimeService realtimeService) : BaseViewModel
+{
+    public ObservableCollection<ChatSummaryDto> Chats { get; } = [];
+
+    [ObservableProperty]
+    private ChatSummaryDto? selectedChat;
+
+    public string EmptyState => Chats.Count == 0 ? "No chats yet. Open Discover to start a dialog, group or channel." : string.Empty;
+
+    [RelayCommand]
+    public async Task LoadAsync()
+    {
+        await RunBusyAsync(async () =>
+        {
+            var chats = await apiClient.GetChatsAsync();
+            MainThread.BeginInvokeOnMainThread(() =>
+            {
+                Chats.Clear();
+                foreach (var chat in chats)
+                {
+                    Chats.Add(chat);
+                }
+
+                OnPropertyChanged(nameof(EmptyState));
+            });
+        });
+    }
+
+    [RelayCommand]
+    public async Task OpenChatAsync(ChatSummaryDto? chat)
+    {
+        if (chat is null)
+        {
+            return;
+        }
+
+        SelectedChat = null;
+        await Shell.Current.GoToAsync($"{nameof(ChatPage)}?chatId={chat.Id}");
+    }
+
+    public void AttachRealtime()
+    {
+        realtimeService.MessageReceived -= OnRealtimeChanged;
+        realtimeService.MessageUpdated -= OnRealtimeChanged;
+        realtimeService.ChatCreated -= OnChatCreated;
+        realtimeService.ChatsChanged -= OnRealtimeChanged;
+
+        realtimeService.MessageReceived += OnRealtimeChanged;
+        realtimeService.MessageUpdated += OnRealtimeChanged;
+        realtimeService.ChatCreated += OnChatCreated;
+        realtimeService.ChatsChanged += OnRealtimeChanged;
+    }
+
+    private void OnChatCreated(object? sender, ChatSummaryDto e)
+    {
+        MainThread.BeginInvokeOnMainThread(() => _ = LoadAsync());
+    }
+
+    private void OnRealtimeChanged(object? sender, EventArgs e)
+    {
+        MainThread.BeginInvokeOnMainThread(() => _ = LoadAsync());
+    }
+
+    private void OnRealtimeChanged(object? sender, MessageDto e)
+    {
+        MainThread.BeginInvokeOnMainThread(() => _ = LoadAsync());
+    }
+}