Восстановил поломанную отправку и печать

backend/src/Contracts/Messaging/Domain/Message.cs

@@ -23,9 +23,6 @@ public abstract class Message : AggregateRoot<Guid>
     protected List<DeletedMessage> _deletedFor = new();
     public IReadOnlyCollection<DeletedMessage> DeletedFor => _deletedFor.AsReadOnly();
 
-    protected List<Guid> _readByUsers = new();
-    public IReadOnlyCollection<Guid> ReadByUsers => _readByUsers.AsReadOnly();
-
     protected Message() : base(Guid.Empty) { }
 
     protected Message(Guid id, Guid chatId, Guid senderId, Guid? replyToId, Guid? forwardedFromId, DateTime createdAt, bool isImported) 
@@ -56,14 +53,4 @@ public abstract class Message : AggregateRoot<Guid>
         if (!_deletedFor.Exists(x => x.UserId == userId)) 
             _deletedFor.Add(new DeletedMessage(Id, userId)); 
     }
-
-    public void MarkAsRead(Guid userId)
-    {
-        if (!_readByUsers.Contains(userId))
-        {
-            _readByUsers.Add(userId);
-        }
-    }
-
-    public bool IsReadBy(Guid userId) => _readByUsers.Contains(userId);
 }

backend/src/Modules/Conversations/Application/Chats/LeaveOrDelete/LeaveOrDeleteChat.cs

@@ -1,15 +1,13 @@
 using System;
-using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
-using Knot.Contracts.Conversations.Application.Abstractions;
-using Knot.Contracts.Conversations.Domain;
-using Knot.Contracts.Messaging.Application.Abstractions;
-using Knot.Modules.Conversations.Infrastructure.SignalR;
 using Knot.Shared.Kernel;
-using Knot.Shared.Kernel.Storage;
+using Knot.Contracts.Conversations.Domain;
+using Knot.Contracts.Conversations.Application.Abstractions;
 using MediatR;
-using Microsoft.AspNetCore.SignalR;
+using System.Linq;
+using Knot.Contracts.Messaging.Application.Abstractions;
+using Knot.Shared.Kernel.Storage;
 
 namespace Knot.Modules.Conversations.Application.Chats.LeaveOrDelete;
 
@@ -21,21 +19,17 @@ internal sealed class LeaveOrDeleteChatCommandHandler : ICommandHandler<LeaveOrD
     private readonly IMessageRepository _messageRepository;
     private readonly IFileStorageService _fileStorage;
     private readonly IChatsUnitOfWork _uow;
-    private readonly IHubContext<ChatHub> _hubContext;
 
     public LeaveOrDeleteChatCommandHandler(
         IChatRepository chatRepository, 
-
         IMessageRepository messageRepository,
         IFileStorageService fileStorage,
-        IChatsUnitOfWork uow,
+        IChatsUnitOfWork uow)
-        IHubContext<ChatHub> hubContext)
     {
         _chatRepository = chatRepository;
         _messageRepository = messageRepository;
         _fileStorage = fileStorage;
         _uow = uow;
-        _hubContext = hubContext;
     }
 
     public async Task<Result<SuccessResponse>> Handle(LeaveOrDeleteChatCommand request, CancellationToken cancellationToken)
@@ -64,14 +58,6 @@ internal sealed class LeaveOrDeleteChatCommandHandler : ICommandHandler<LeaveOrD
             // DELETE ALL MESSAGES AND FILES FIRST
             await DeleteChatMediaAndMessagesAsync(chat.Id, cancellationToken);
             _chatRepository.Remove(chat);
-
-            // Notify all remaining members that the chat was deleted
-
-            foreach (var member in chat.Members)
-            {
-                await _hubContext.Clients.User(member.UserId.ToString())
-                    .SendAsync("chat_deleted", chat.Id.ToString(), cancellationToken);
-            }
         }
 
         await _uow.SaveChangesAsync(cancellationToken);
@@ -82,7 +68,6 @@ internal sealed class LeaveOrDeleteChatCommandHandler : ICommandHandler<LeaveOrD
     private async Task DeleteChatMediaAndMessagesAsync(Guid chatId, CancellationToken ct)
     {
         try 
-
         {
             // Get all messages directly from Mongo (not paged)
             var messages = await _messageRepository.GetChatMessagesAsync(chatId, int.MaxValue, 0, ct);

backend/src/Modules/Conversations/Application/Messages/GetMessages/GetMessagesQuery.cs

@@ -159,7 +159,7 @@ internal sealed class GetMessagesQueryHandler : IQueryHandler<GetMessagesQuery,
                 (message as StoryMessage)?.StoryMediaType,
                 (message as MediaMessage)?.Media.Select(m => new MediaDto(m.Id, m.Type, m.Url, m.Filename, m.Size, m.Duration)).ToList() ?? new List<MediaDto>(),
                 sender != null ? new MessageSenderDto(sender.Id, sender.Username, sender.DisplayName, sender.Avatar) : new MessageSenderDto(message.SenderId, "unknown", "Unknown", null),
-                message.ReadByUsers.Select(id => new ReadByDto(id)).ToList(),
+                new List<ReadByDto>(), // ReadBy not implemented in this detailed view yet
                 reactions?.Select(r =>
                 {
                     senders.TryGetValue(r.UserId, out var ru);

backend/src/Modules/Conversations/Application/Messages/Read/ReadMessagesCommandHandler.cs

@@ -1,8 +1,7 @@
-using Knot.Contracts.Conversations.Application.Abstractions;
-using Knot.Contracts.Conversations.Domain;
-using Knot.Contracts.Messaging.Application.Abstractions;
-using Knot.Shared.Kernel;
 using MediatR;
+using Knot.Contracts.Conversations.Domain;
+using Knot.Shared.Kernel;
+using Knot.Contracts.Conversations.Application.Abstractions;
 
 namespace Knot.Modules.Conversations.Application.Messages.Read;
 
@@ -12,13 +11,11 @@ public sealed class ReadMessagesCommandHandler : ICommandHandler<ReadMessagesCom
 {
     private readonly IChatRepository _chatRepository;
     private readonly IChatsUnitOfWork _unitOfWork;
-    private readonly IMessageRepository _messageRepository;
 
-    public ReadMessagesCommandHandler(IChatRepository chatRepository, IChatsUnitOfWork unitOfWork, IMessageRepository messageRepository)
+    public ReadMessagesCommandHandler(IChatRepository chatRepository, IChatsUnitOfWork unitOfWork)
     {
         _chatRepository = chatRepository;
         _unitOfWork = unitOfWork;
-        _messageRepository = messageRepository;
     }
 
     public async Task<Result> Handle(ReadMessagesCommand request, CancellationToken cancellationToken)
@@ -31,23 +28,6 @@ public sealed class ReadMessagesCommandHandler : ICommandHandler<ReadMessagesCom
 
         member.UpdateReadCursor(request.LastReadMessageId, request.LastReadSequenceId);
 
-        // Обновляем ReadByUsers для всех сообщений до LastReadSequenceId
-        var messages = await _messageRepository.GetChatMessagesAfterAsync(
-            request.ChatId,
-            0,
-            1000,
-            cancellationToken);
-
-        foreach (var message in messages)
-        {
-            if (message.SequenceId <= request.LastReadSequenceId &&
-                message.SenderId != request.UserId &&
-                !message.IsReadBy(request.UserId))
-            {
-                message.MarkAsRead(request.UserId);
-            }
-        }
-
         await _unitOfWork.SaveChangesAsync(cancellationToken);
 
         return Result.Success();

backend/src/Modules/Conversations/Application/Messages/SearchMessages/SearchMessagesQuery.cs

@@ -3,10 +3,10 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
-using Knot.Contracts.Conversations.Domain;
 using Knot.Contracts.Messaging.Application.Abstractions;
 using Knot.Contracts.Messaging.Domain;
 using Knot.Modules.Conversations.Application.DTOs;
+using Knot.Contracts.Conversations.Domain;
 using Knot.Shared.Kernel;
 using MediatR;
 
@@ -41,8 +41,7 @@ internal sealed class SearchMessagesQueryHandler : IQueryHandler<SearchMessagesQ
         var allReactions = await _reactionRepository.GetReactionsForMessagesAsync(messageIds, cancellationToken);
         var reactionsByMessage = allReactions.GroupBy(r => r.MessageId).ToDictionary(g => g.Key, g => g.ToList());
 
-        var result = messages.Select(message =>
+        var result = messages.Select(message => {
-        {
             var textMessage = message as TextMessage;
             var mediaMessage = message as MediaMessage;
             var storyMessage = message as StoryMessage;
@@ -67,7 +66,7 @@ internal sealed class SearchMessagesQueryHandler : IQueryHandler<SearchMessagesQ
                 mediaMessage?.Media.Select(media => new MediaDto(media.Id, media.Type, media.Url, media.Filename, media.Size)).ToList() ?? new List<MediaDto>(),
                 senders.TryGetValue(message.SenderId, out var senderUser) ? new MessageSenderDto(senderUser.Id, senderUser.Username, senderUser.DisplayName, senderUser.Avatar) : new MessageSenderDto(message.SenderId, "unknown", "Unknown", null),
                 reactionsByMessage.TryGetValue(message.Id, out var mr) ? mr.Select(reaction => new SimpleReactionDto(reaction.UserId, reaction.Emoji)).ToList() : new List<SimpleReactionDto>(),
-                message.ReadByUsers.Select(id => new ReadByDto(id)).ToList()
+                new List<ReadByDto>()
             );
         }).ToList();
 

backend/src/Modules/Conversations/Application/Messages/Send/SendMessageCommandHandler.cs

@@ -1,8 +1,8 @@
-using Knot.Contracts.Conversations.Application.Abstractions;
-using Knot.Contracts.Conversations.Domain;
 using Knot.Contracts.Messaging.Application.Abstractions;
 using Knot.Contracts.Messaging.Domain;
 using Knot.Contracts.Settings.Application.Abstractions;
+using Knot.Contracts.Conversations.Application.Abstractions;
+using Knot.Contracts.Conversations.Domain;
 using Knot.Shared.Kernel;
 
 namespace Knot.Modules.Conversations.Application.Messages.Send;
@@ -192,7 +192,6 @@ public sealed class SendMessageCommandHandler : ICommandHandler<SendMessageComma
         var senderMember = chat.Members.First(m => m.UserId == request.SenderId);
         senderMember.UpdateReadCursor(message.Id, message.SequenceId);
         senderMember.UpdateDeliveredCursor(message.Id);
-        message.MarkAsRead(request.SenderId); // Отправитель всегда "прочитал" своё сообщение
 
         // 5. ���������
         _messageRepository.Add(message);

backend/src/Modules/Conversations/Infrastructure/SignalR/ChatHub.cs

@@ -1,26 +1,26 @@
 using System.Collections.Concurrent;
 using System.Security.Claims;
-using Knot.Contracts.Auth.Application.Abstractions;
-using Knot.Contracts.Auth.Domain;
-using Knot.Contracts.Conversations.Application.Abstractions;
-using Knot.Contracts.Conversations.Domain;
-using Knot.Contracts.Messaging.Application.Abstractions;
-using Knot.Contracts.Messaging.Domain;
-using Knot.Modules.Conversations.Application.DTOs;
-using Knot.Modules.Conversations.Application.Messages.Delete;
-using Knot.Modules.Conversations.Application.Messages.Edit;
-using Knot.Modules.Conversations.Application.Messages.Pin;
-using Knot.Modules.Conversations.Application.Messages.React;
-using Knot.Modules.Conversations.Application.Messages.Read;
-using Knot.Modules.Conversations.Application.Messages.Send;
-using Knot.Modules.Conversations.Application.Messages.Unpin;
-using Knot.Modules.Conversations.Application.Messages.Vote;
-using Knot.Shared.Kernel;
 using MediatR;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.SignalR;
-using Microsoft.Extensions.Caching.Memory;
 using Microsoft.Extensions.Logging;
+using Knot.Modules.Conversations.Application.Messages.Send;
+using Knot.Modules.Conversations.Application.Messages.Read;
+using Knot.Modules.Conversations.Application.Messages.Delete;
+using Knot.Modules.Conversations.Application.Messages.React;
+using Knot.Contracts.Conversations.Domain;
+using Knot.Shared.Kernel;
+using Microsoft.Extensions.Caching.Memory;
+using Knot.Contracts.Auth.Domain;
+using Knot.Contracts.Auth.Application.Abstractions;
+using Knot.Modules.Conversations.Application.Messages.Pin;
+using Knot.Modules.Conversations.Application.Messages.Unpin;
+using Knot.Modules.Conversations.Application.Messages.Vote;
+using Knot.Modules.Conversations.Application.Messages.Edit;
+using Knot.Modules.Conversations.Application.DTOs;
+using Knot.Contracts.Messaging.Application.Abstractions;
+using Knot.Contracts.Messaging.Domain;
+using Knot.Contracts.Conversations.Application.Abstractions;
 
 namespace Knot.Modules.Conversations.Infrastructure.SignalR;
 
@@ -158,7 +158,6 @@ public sealed class ChatHub : Hub
             await _sender.Send(command);
         }
 
-        // Отправляем событие всем в чате о том, что пользователь прочитал сообщения
         await Clients.Group(request.ChatId.ToString()).SendAsync("messages_read", new
         {
             ChatId = request.ChatId.ToString(),

backend/src/Modules/Messaging/Domain/Message.cs

@@ -42,10 +42,6 @@ public abstract class Message : AggregateRoot<Guid>
     protected List<DeletedMessage> _deletedFor = new();
     public IReadOnlyCollection<DeletedMessage> DeletedFor => _deletedFor.AsReadOnly();
 
-    // ================== Прочитано ==================
-    protected List<Guid> _readByUsers = new();
-    public IReadOnlyCollection<Guid> ReadByUsers => _readByUsers.AsReadOnly();
-
     // ================== Инфраструктурный конструктор EF ==================
     protected Message() : base(Guid.Empty) { }
 
@@ -93,16 +89,6 @@ public abstract class Message : AggregateRoot<Guid>
             _deletedFor.Add(new DeletedMessage(Id, userId));
         }
     }
-
-    public void MarkAsRead(Guid userId)
-    {
-        if (!_readByUsers.Contains(userId))
-        {
-            _readByUsers.Add(userId);
-        }
-    }
-
-    public bool IsReadBy(Guid userId) => _readByUsers.Contains(userId);
 }
 
 

backend/src/Modules/Messaging/Infrastructure/Handlers/MessageSentDomainEventHandler.cs

@@ -84,7 +84,7 @@ public sealed class MessageSentDomainEventHandler : INotificationHandler<Message
                 size = m.Size
             }).ToList() ?? (object)Array.Empty<object>(),
             sender = senderObj,
-            readBy = message.ReadByUsers.Select(id => new { id }).ToList(),
+            readBy = new List<object>(),
             storyId = (message as StoryMessage)?.StoryId,
             storyMediaUrl = (message as StoryMessage)?.StoryMediaUrl,
             storyMediaType = (message as StoryMessage)?.StoryMediaType,

client-mobile/.gradle/buildOutputCleanup/cache.properties

@@ -0,0 +1,2 @@
+#Tue Apr 14 00:27:15 MSK 2026
+gradle.version=8.5

client-mobile/.gradle/config.properties

@@ -0,0 +1,2 @@
+#Tue Apr 14 00:13:58 MSK 2026
+java.home=C\:\\Program Files\\Android\\Android Studio\\jbr

client-mobile/app/build.gradle.kts

@@ -0,0 +1,141 @@
+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+    id("com.google.dagger.hilt.android")
+    id("com.google.gms.google-services")
+    kotlin("kapt")
+}
+
+android {
+    namespace = "ru.knot.messager"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "ru.knot.messager"
+        minSdk = 26
+        targetSdk = 34
+        versionCode = 1
+        versionName = "1.0.0"
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+        vectorDrawables {
+            useSupportLibrary = true
+        }
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+        }
+    }
+    
+    // Подключаем все наши папки с кодом как sourceSets
+    sourceSets {
+        getByName("main") {
+            java.srcDirs(
+                "src/main/kotlin",
+                "../auth",
+                "../chats",
+                "../core",
+                "../calls",
+                "../stories",
+                "../contacts",
+                "../profiles",
+                "../settings",
+                "../navigation"
+            )
+        }
+    }
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_17
+        targetCompatibility = JavaVersion.VERSION_17
+    }
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+    buildFeatures {
+        compose = true
+    }
+    composeOptions {
+        kotlinCompilerExtensionVersion = "1.5.8"
+    }
+    packaging {
+        resources {
+            excludes += "/META-INF/{AL2.0,LGPL2.1}"
+        }
+    }
+}
+
+dependencies {
+    // AndroidX & UI
+    implementation("androidx.core:core-ktx:1.12.0")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.6.2")
+    implementation("androidx.activity:activity-compose:1.8.1")
+    implementation(platform("androidx.compose:compose-bom:2023.10.01"))
+    implementation("androidx.compose.ui:ui")
+    implementation("androidx.compose.ui:ui-graphics")
+    implementation("androidx.compose.ui:ui-tooling-preview")
+    implementation("androidx.compose.material3:material3")
+    implementation("com.google.android.material:material:1.11.0")
+    implementation("androidx.navigation:navigation-compose:2.7.5")
+    implementation("androidx.compose.material:material-icons-extended")
+
+    // Hilt
+    implementation("com.google.dagger:hilt-android:2.48")
+    kapt("com.google.dagger:hilt-android-compiler:2.48")
+    implementation("androidx.hilt:hilt-navigation-compose:1.1.0")
+
+    // Network & SignalR
+    implementation("com.squareup.retrofit2:retrofit:2.9.0")
+    implementation("com.squareup.retrofit2:converter-gson:2.9.0")
+    implementation("com.squareup.okhttp3:logging-interceptor:4.12.0")
+    implementation("com.microsoft.signalr:signalr:7.0.0")
+
+    // WebRTC
+    implementation("com.github.webrtc-sdk:android:104.5112.01")
+
+    // Media3 (ExoPlayer)
+    implementation("androidx.media3:media3-exoplayer:1.2.0")
+    implementation("androidx.media3:media3-ui:1.2.0")
+    implementation("androidx.media3:media3-common:1.2.0")
+
+    // Images & GIF
+    implementation("io.coil-kt:coil-compose:2.5.0")
+    implementation("io.coil-kt:coil-gif:2.5.0")
+    implementation("io.coil-kt:coil-svg:2.5.0")
+    implementation("io.coil-kt:coil-video:2.5.0")
+
+    // Security
+    implementation("androidx.security:security-crypto:1.1.0-alpha06")
+
+    // UCrop (Image Cropping)
+    implementation("com.github.yalantis:ucrop:2.2.8")
+
+    // Firebase (Push Notifications)
+    implementation(platform("com.google.firebase:firebase-bom:32.7.0"))
+    implementation("com.google.firebase:firebase-messaging-ktx")
+    implementation("com.google.firebase:firebase-analytics-ktx")
+
+    // Room
+    val room_version = "2.6.1"
+    implementation("androidx.room:room-runtime:$room_version")
+    implementation("androidx.room:room-ktx:$room_version")
+    implementation("androidx.room:room-paging:$room_version")
+    kapt("androidx.room:room-compiler:$room_version")
+
+    // Paging 3
+    implementation("androidx.paging:paging-runtime-ktx:3.2.1")
+    implementation("androidx.paging:paging-compose:3.2.1")
+
+    // WorkManager
+    implementation("androidx.work:work-runtime-ktx:2.9.0")
+    implementation("androidx.hilt:hilt-work:1.1.0")
+    kapt("androidx.hilt:hilt-compiler:1.1.0")
+
+    // Testing
+    testImplementation("junit:junit:4.13.2")
+    androidTestImplementation("androidx.test.ext:junit:1.1.5")
+    androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
+}

client-mobile/app/google-services.json

@@ -0,0 +1,29 @@
+{
+  "project_info": {
+    "project_number": "483917912506",
+    "project_id": "knot-bad1a",
+    "storage_bucket": "knot-bad1a.firebasestorage.app"
+  },
+  "client": [
+    {
+      "client_info": {
+        "mobilesdk_app_id": "1:483917912506:android:cd39213364869ef9e82583",
+        "android_client_info": {
+          "package_name": "ru.knot.messager"
+        }
+      },
+      "oauth_client": [],
+      "api_key": [
+        {
+          "current_key": "AIzaSyBAL_bZJYaa7rGERLX63LeFXz-__JXRWQY"
+        }
+      ],
+      "services": {
+        "appinvite_service": {
+          "other_platform_oauth_client": []
+        }
+      }
+    }
+  ],
+  "configuration_version": "1"
+}

client-mobile/app/src/main/AndroidManifest.xml

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="ru.knot.messager">
+
+    <uses-permission android:name="android.permission.INTERNET" />
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.CAMERA" />
+    <uses-permission android:name="android.permission.RECORD_AUDIO" />
+    <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+
+    <application
+        android:name="com.knot.messenger.MainApplication"
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:supportsRtl="true"
+        android:theme="@style/Theme.KnotMessenger"
+        android:networkSecurityConfig="@xml/network_security_config"
+        android:usesCleartextTraffic="true">
+
+        <activity
+            android:name="com.knot.messenger.MainActivity"
+            android:exported="true"
+            android:launchMode="singleTop"
+            android:windowSoftInputMode="adjustResize"
+            android:theme="@style/Theme.KnotMessenger">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+
+        <service
+            android:name="core.notifications.data.ForkFirebaseMessagingService"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="com.google.firebase.MESSAGING_EVENT" />
+            </intent-filter>
+        </service>
+
+    </application>
+</manifest>

client-mobile/app/src/main/kotlin/com/knot/messenger/MainActivity.kt

@@ -0,0 +1,60 @@
+package com.knot.messenger
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.ui.Modifier
+import dagger.hilt.android.AndroidEntryPoint
+import navigation.AppNavigation
+import core.presentation.theme.ForkMessengerTheme
+
+@AndroidEntryPoint
+class MainActivity : ComponentActivity() {
+    @javax.inject.Inject
+    lateinit var navigationManager: core.utils.NavigationManager
+
+    @javax.inject.Inject
+    lateinit var signalrNotificationObserver: chats.data.remote.signalr.SignalRNotificationObserver
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        
+        android.util.Log.d("MainActivity", "onCreate called")
+        signalrNotificationObserver.start()
+        android.util.Log.d("MainActivity", "signalrNotificationObserver.start() called")
+
+        intent.getStringExtra("chatId")?.let { chatId ->
+            navigationManager.navigateToChat(chatId)
+        }
+        
+        // Request notifications permission for Android 13+
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.TIRAMISU) {
+            androidx.core.app.ActivityCompat.requestPermissions(
+                this,
+                arrayOf(android.Manifest.permission.POST_NOTIFICATIONS),
+                101
+            )
+        }
+
+        setContent {
+            ForkMessengerTheme {
+                Surface(
+                    modifier = Modifier.fillMaxSize(),
+                    color = MaterialTheme.colorScheme.background
+                ) {
+                    AppNavigation(navigationManager = navigationManager)
+                }
+            }
+        }
+    }
+
+    override fun onNewIntent(intent: android.content.Intent?) {
+        super.onNewIntent(intent)
+        intent?.getStringExtra("chatId")?.let { chatId ->
+            navigationManager.navigateToChat(chatId)
+        }
+    }
+}

client-mobile/app/src/main/kotlin/com/knot/messenger/MainApplication.kt

@@ -0,0 +1,19 @@
+package com.knot.messenger
+
+import android.app.Application
+import coil.ImageLoader
+import coil.ImageLoaderFactory
+import coil.decode.VideoFrameDecoder
+import dagger.hilt.android.HiltAndroidApp
+
+@HiltAndroidApp
+class MainApplication : Application(), ImageLoaderFactory {
+    override fun newImageLoader(): ImageLoader {
+        return ImageLoader.Builder(this)
+            .components {
+                add(VideoFrameDecoder.Factory())
+            }
+            .build()
+    }
+}
+    

client-mobile/app/src/main/res/values-en/strings.xml

@@ -0,0 +1,64 @@
+<resources>
+    <string name="app_name">ForkMessenger</string>
+    <string name="login">Login</string>
+    <string name="register">Register</string>
+    <string name="username">Username</string>
+    <string name="password">Password</string>
+    <string name="display_name">Display Name</string>
+    <string name="settings">Settings</string>
+    <string name="save">Save</string>
+    <string name="back">Back</string>
+    <string name="server_connection">Server Connection</string>
+    <string name="api_base_url">API Base URL</string>
+    <string name="server_features">Server Features</string>
+    <string name="stories">Stories</string>
+    <string name="polls">Polls</string>
+    <string name="calls">Calls</string>
+    <string name="groups">Groups</string>
+    <string name="enabled">Enabled</string>
+    <string name="disabled">Disabled</string>
+    <string name="limits">Limits</string>
+    <string name="max_file_size">Max File Size</string>
+    <string name="max_group_members">Max Group Members</string>
+    <string name="message">Message</string>
+    <string name="call">Call</string>
+    <string name="block">Block</string>
+    <string name="profile">Profile</string>
+    <string name="confirm_password">Confirm Password</string>
+    <string name="passwords_not_match">Passwords do not match</string>
+    <string name="no_account_register">Don\'t have an account? Register</string>
+    <string name="already_have_account">Already have an account? Login</string>
+    <string name="error_occurred">An error occurred</string>
+    <string name="loading">Loading...</string>
+    <string name="chats_title">Chats</string>
+    <string name="contacts_title">Contacts</string>
+    <string name="stories_title">Stories</string>
+    <string name="create_story">Create Story</string>
+    <string name="send_message_hint">Type a message...</string>
+    <string name="reply_to_user">Reply to %1$s...</string>
+    <string name="story_editor">STORY EDITOR</string>
+    <string name="publish">PUBLISH</string>
+    <string name="start_creation">START CREATION</string>
+    <string name="text_tool">TEXT</string>
+    <string name="crop_tool">CROP</string>
+    <string name="stickers_tool">STICKERS</string>
+    <string name="brush_tool">BRUSH</string>
+    <string name="filters_tool">FILTERS</string>
+    <string name="remove">Remove</string>
+    <string name="no_chats_found">No chats found</string>
+    <string name="typing">typing...</string>
+    <string name="video_call">Video Call</string>
+    <string name="emoji">Emoji</string>
+    <string name="attach">Attach</string>
+    <string name="message_placeholder">Message...</string>
+    <string name="voice_message">Voice Message</string>
+    <string name="send">Send</string>
+    <string name="reply_photo">Photo</string>
+    <string name="reply_video">Video</string>
+    <string name="reply_audio">Audio</string>
+    <string name="reply_file">File</string>
+    <string name="reply_gif">GIF</string>
+    <string name="reply_prefix">Reply to </string>
+    <string name="reply_self">yourself</string>
+    <string name="no_messages_yet">No messages yet</string>
+</resources>

client-mobile/app/src/main/res/values/strings.xml

@@ -0,0 +1,86 @@
+<resources>
+    <string name="app_name">ForkMessenger</string>
+    <string name="login">Войти</string>
+    <string name="register">Регистрация</string>
+    <string name="username">Имя пользователя</string>
+    <string name="password">Пароль</string>
+    <string name="display_name">Отображаемое имя</string>
+    <string name="settings">Настройки</string>
+    <string name="save">Сохранить</string>
+    <string name="back">Назад</string>
+    <string name="server_connection">Подключение к серверу</string>
+    <string name="api_base_url">API Base URL</string>
+    <string name="server_features">Функции сервера</string>
+    <string name="stories">Истории</string>
+    <string name="polls">Опросы</string>
+    <string name="calls">Звонки</string>
+    <string name="groups">Группы</string>
+    <string name="enabled">Включено</string>
+    <string name="disabled">Отключено</string>
+    <string name="limits">Лимиты</string>
+    <string name="max_file_size">Макс. размер файла</string>
+    <string name="max_group_members">Макс. участников в группе</string>
+    <string name="message">Сообщение</string>
+    <string name="call">Позвонить</string>
+    <string name="block">Заблокировать</string>
+    <string name="profile">Профиль</string>
+    <string name="confirm_password">Подтвердите пароль</string>
+    <string name="passwords_not_match">Пароли не совпадают</string>
+    <string name="no_account_register">Нет аккаунта? Зарегистрироваться</string>
+    <string name="already_have_account">Уже есть аккаунт? Войти</string>
+    <string name="error_occurred">Произошла ошибка</string>
+    <string name="loading">Загрузка...</string>
+    <string name="chats_title">Чаты</string>
+    <string name="contacts_title">Контакты</string>
+    <string name="stories_title">Истории</string>
+    <string name="create_story">Создать историю</string>
+    <string name="send_message_hint">Напишите сообщение...</string>
+    <string name="reply_to_user">Ответить %1$s...</string>
+    <string name="story_editor">РЕДАКТОР ИСТОРИЙ</string>
+    <string name="publish">ОПУБЛИКОВАТЬ</string>
+    <string name="start_creation">НАЧАТЬ СОЗДАНИЕ</string>
+    <string name="text_tool">ТЕКСТ</string>
+    <string name="crop_tool">ОБРЕЗКА</string>
+    <string name="stickers_tool">СТИКЕРЫ</string>
+    <string name="brush_tool">КИСТЬ</string>
+    <string name="filters_tool">ФИЛЬТРЫ</string>
+    <string name="remove">Удалить</string>
+    <string name="no_chats_found">Чаты не найдены</string>
+    <string name="typing">печатает...</string>
+    <string name="video_call">Видеозвонок</string>
+    <string name="emoji">Эмодзи</string>
+    <string name="attach">Прикрепить</string>
+    <string name="message_placeholder">Сообщение...</string>
+    <string name="voice_message">Голосовое сообщение</string>
+    <string name="send">Отправить</string>
+    <string name="search_hint">Поиск...</string>
+    <string name="online">В сети</string>
+    <string name="last_seen">Был(а): %1$s</string>
+    <string name="last_seen_recently">недавно</string>
+    <string name="all">Все</string>
+    <string name="online_tab">Онлайн</string>
+    <string name="blocked">Заблокированные</string>
+    <string name="media">Медиа</string>
+    <string name="notifications">Уведомления</string>
+    <string name="mute">Без звука</string>
+    <string name="unmute">Включить звук</string>
+    <string name="log_out">Выйти из аккаунта</string>
+    <string name="bio">О себе</string>
+    <string name="edit_profile">Редактировать профиль</string>
+    <string name="username_label">Имя пользователя</string>
+    <string name="change_photo">Изменить фото</string>
+    <string name="cancel">Отмена</string>
+    <string name="crop">Обрезать</string>
+    <string name="chats">Чаты</string>
+    <string name="contacts_tab">Контакты</string>
+    <string name="profile_tab">Профиль</string>
+    <string name="saving">Сохранение...</string>
+    <string name="reply_photo">Фото</string>
+    <string name="reply_video">Видео</string>
+    <string name="reply_audio">Аудио</string>
+    <string name="reply_file">Файл</string>
+    <string name="reply_gif">GIF</string>
+    <string name="reply_prefix">Ответ </string>
+    <string name="reply_self">самому себе</string>
+    <string name="no_messages_yet">Сообщений пока нет</string>
+</resources>

client-mobile/app/src/main/res/values/styles.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <style name="Theme.KnotMessenger" parent="Theme.Material3.DayNight.NoActionBar">
+        <item name="android:statusBarColor">#0F0F10</item>
+        <item name="android:windowBackground">#0F0F10</item>
+    </style>
+</resources>

client-mobile/app/src/main/res/xml/network_security_config.xml

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<network-security-config>
+    <!-- Для отладки: доверяем пользовательским сертификатам -->
+    <debug-overrides>
+        <trust-anchors>
+            <certificates src="user" />
+            <certificates src="system" />
+        </trust-anchors>
+    </debug-overrides>
+    
+    <!-- Разрешаем cleartext (HTTP) трафик для локальных IP -->
+    <domain-config cleartextTrafficPermitted="true">
+        <domain includeSubdomains="true">localhost</domain>
+        <domain includeSubdomains="true">127.0.0.1</domain>
+        <domain includeSubdomains="true">10.0.0.0/8</domain>
+        <domain includeSubdomains="true">172.16.0.0/12</domain>
+        <domain includeSubdomains="true">192.168.0.0/16</domain>
+    </domain-config>
+</network-security-config>

client-mobile/auth/data/remote/api/AuthApi.kt

@@ -0,0 +1,29 @@
+package auth.data.remote.api
+
+import auth.data.remote.dto.AuthRequest
+import auth.data.remote.dto.AuthResponse
+import auth.data.remote.dto.RefreshTokenRequest
+import core.domain.model.ServerConfigModel
+import retrofit2.http.Body
+import retrofit2.http.GET
+import retrofit2.http.Headers
+import retrofit2.http.POST
+
+interface AuthApi {
+    @POST("auth/login")
+    suspend fun login(@Body request: AuthRequest): AuthResponse
+
+    @POST("auth/register")
+    suspend fun register(@Body request: AuthRequest): AuthResponse
+
+    @POST("auth/refresh")
+    suspend fun refreshToken(@Body request: RefreshTokenRequest): AuthResponse
+
+    @GET("config")
+    @Headers("Cache-Control: no-cache")
+    suspend fun getConfig(): ServerConfigModel
+
+    @POST("auth/push-token")
+    @Headers("Cache-Control: no-cache")
+    suspend fun updatePushToken(@Body token: String): Unit
+}

client-mobile/auth/data/remote/dto/AuthDtos.kt

@@ -0,0 +1,28 @@
+package auth.data.remote.dto
+
+import com.google.gson.annotations.SerializedName
+
+data class AuthRequest(
+    @SerializedName("userName") val userName: String,
+    @SerializedName("password") val password: String
+)
+
+data class AuthResponse(
+    @SerializedName("accessToken") val accessToken: String?,
+    @SerializedName("refreshToken") val refreshToken: String?,
+    @SerializedName("user") val user: UserDto?,
+    @SerializedName("userId") val userId: String?,
+    @SerializedName("username") val username: String?,
+    @SerializedName("displayName") val displayName: String?
+)
+
+data class UserDto(
+    @SerializedName("id") val id: String,
+    @SerializedName("userName") val userName: String,
+    @SerializedName("displayName") val displayName: String?,
+    @SerializedName("avatarUrl") val avatarUrl: String?
+)
+
+data class RefreshTokenRequest(
+    @SerializedName("refreshToken") val refreshToken: String
+)

client-mobile/auth/data/repository/AuthRepositoryImpl.kt

@@ -0,0 +1,131 @@
+package auth.data.repository
+
+import auth.data.remote.api.AuthApi
+import auth.data.remote.dto.AuthRequest
+import auth.data.remote.dto.RefreshTokenRequest
+import auth.domain.model.AuthResult
+import auth.domain.repository.AuthRepository
+import core.network.ServerConfig
+import core.security.TokenManager
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import javax.inject.Inject
+
+class AuthRepositoryImpl @Inject constructor(
+    private val api: AuthApi,
+    private val tokenManager: TokenManager,
+    private val serverConfig: ServerConfig
+) : AuthRepository {
+
+    private val _isAuthenticated = kotlinx.coroutines.flow.MutableStateFlow(tokenManager.getToken() != null)
+
+    override suspend fun login(userName: String, password: String): Result<AuthResult> {
+        return try {
+            val response = api.login(AuthRequest(userName, password))
+            val token = response.accessToken ?: return Result.failure(Exception("Token is null"))
+            val userId = response.userId ?: ""
+            
+            tokenManager.saveToken(token, userId, response.refreshToken)
+            _isAuthenticated.value = true
+            fetchConfig()
+            Result.success(
+                AuthResult(
+                    token = token,
+                    refreshToken = response.refreshToken,
+                    userId = userId,
+                    userName = response.username ?: userName,
+                    displayName = response.displayName ?: response.username ?: userName,
+                    avatarUrl = null
+                )
+            )
+        } catch (e: Exception) {
+            Result.failure(e)
+        }
+    }
+
+    override suspend fun register(userName: String, password: String): Result<AuthResult> {
+        return try {
+            val response = api.register(AuthRequest(userName, password))
+            val token = response.accessToken ?: return Result.failure(Exception("Token is null"))
+            val userId = response.userId ?: ""
+
+            tokenManager.saveToken(token, userId, response.refreshToken)
+            _isAuthenticated.value = true
+            fetchConfig()
+            Result.success(
+                AuthResult(
+                    token = token,
+                    refreshToken = response.refreshToken,
+                    userId = userId,
+                    userName = response.username ?: userName,
+                    displayName = response.displayName ?: response.username ?: userName,
+                    avatarUrl = null
+                )
+            )
+        } catch (e: Exception) {
+            Result.failure(e)
+        }
+    }
+
+    override suspend fun logout() {
+        tokenManager.deleteToken()
+        _isAuthenticated.value = false
+    }
+
+    override fun isAuthenticated(): Boolean {
+        return _isAuthenticated.value
+    }
+
+    override fun isAuthenticatedFlow(): kotlinx.coroutines.flow.StateFlow<Boolean> {
+        return _isAuthenticated.asStateFlow()
+    }
+
+    override suspend fun fetchConfig(): Result<Unit> {
+        return try {
+            val config = api.getConfig()
+            serverConfig.saveServerConfig(config)
+            Result.success(Unit)
+        } catch (e: Exception) {
+            Result.failure(e)
+        }
+    }
+
+    override suspend fun updatePushToken(token: String) {
+        try {
+            api.updatePushToken(token)
+        } catch (e: Exception) {
+            // Silent fail
+        }
+    }
+
+    override suspend fun refreshToken(): Result<AuthResult> {
+        val currentRefreshToken = tokenManager.getRefreshToken()
+        if (currentRefreshToken == null) {
+            return Result.failure(Exception("Refresh token is null"))
+        }
+
+        return try {
+            val response = api.refreshToken(RefreshTokenRequest(currentRefreshToken))
+            val newAccessToken = response.accessToken ?: return Result.failure(Exception("New access token is null"))
+            val newRefreshToken = response.refreshToken
+            val userId = response.userId ?: ""
+
+            tokenManager.saveToken(newAccessToken, userId, newRefreshToken)
+            _isAuthenticated.value = true
+
+            Result.success(
+                AuthResult(
+                    token = newAccessToken,
+                    refreshToken = newRefreshToken,
+                    userId = userId,
+                    userName = response.username ?: "",
+                    displayName = response.displayName ?: "",
+                    avatarUrl = null
+                )
+            )
+        } catch (e: Exception) {
+            Result.failure(e)
+        }
+    }
+}

client-mobile/auth/di/AuthModule.kt

@@ -0,0 +1,34 @@
+package auth.di
+
+import auth.data.remote.api.AuthApi
+import auth.data.repository.AuthRepositoryImpl
+import auth.domain.repository.AuthRepository
+import core.network.ServerConfig
+import core.security.TokenManager
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+import retrofit2.Retrofit
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+object AuthModule {
+
+    @Provides
+    @Singleton
+    fun provideAuthApi(retrofit: Retrofit): AuthApi {
+        return retrofit.create(AuthApi::class.java)
+    }
+
+    @Provides
+    @Singleton
+    fun provideAuthRepository(
+        api: AuthApi,
+        tokenManager: TokenManager,
+        serverConfig: ServerConfig
+    ): AuthRepository {
+        return AuthRepositoryImpl(api, tokenManager, serverConfig)
+    }
+}

client-mobile/auth/domain/model/AuthModels.kt

@@ -0,0 +1,10 @@
+package auth.domain.model
+
+data class AuthResult(
+    val token: String,
+    val refreshToken: String?,
+    val userId: String,
+    val userName: String,
+    val displayName: String,
+    val avatarUrl: String?
+)

client-mobile/auth/domain/repository/AuthRepository.kt

@@ -0,0 +1,14 @@
+package auth.domain.repository
+
+import auth.domain.model.AuthResult
+
+interface AuthRepository {
+    suspend fun login(userName: String, password: String): Result<AuthResult>
+    suspend fun register(userName: String, password: String): Result<AuthResult>
+    suspend fun logout()
+    suspend fun fetchConfig(): Result<Unit>
+    fun isAuthenticated(): Boolean
+    fun isAuthenticatedFlow(): kotlinx.coroutines.flow.StateFlow<Boolean>
+    suspend fun updatePushToken(token: String)
+    suspend fun refreshToken(): Result<AuthResult>
+}

client-mobile/auth/presentation/AuthViewModel.kt

@@ -0,0 +1,94 @@
+package auth.presentation
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import auth.domain.repository.AuthRepository
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import kotlinx.coroutines.flow.update
+import kotlinx.coroutines.launch
+import com.google.firebase.messaging.FirebaseMessaging
+import javax.inject.Inject
+
+data class AuthState(
+    val isLoading: Boolean = false,
+    val error: String? = null,
+    val isAuthenticated: Boolean = false
+)
+
+@HiltViewModel
+class AuthViewModel @Inject constructor(
+    private val repository: AuthRepository
+) : ViewModel() {
+
+    private val _state = MutableStateFlow(AuthState(isAuthenticated = repository.isAuthenticated()))
+    val state: StateFlow<AuthState> = _state.asStateFlow()
+
+    init {
+        viewModelScope.launch {
+            repository.isAuthenticatedFlow().collect { authenticated ->
+                _state.update { it.copy(isAuthenticated = authenticated) }
+                if (authenticated) {
+                    updatePushToken()
+                }
+            }
+        }
+    }
+
+    fun checkAuth() {
+        _state.update { it.copy(isAuthenticated = repository.isAuthenticated()) }
+    }
+
+    fun login(userName: String, password: String) {
+        viewModelScope.launch {
+            _state.update { it.copy(isLoading = true, error = null) }
+            repository.login(userName, password)
+                .onSuccess {
+                    _state.update { it.copy(isLoading = false, isAuthenticated = true) }
+                    updatePushToken()
+                }
+                .onFailure { e ->
+                    _state.update { it.copy(isLoading = false, error = e.message) }
+                }
+        }
+    }
+
+    fun register(userName: String, password: String) {
+        viewModelScope.launch {
+            _state.update { it.copy(isLoading = true, error = null) }
+            repository.register(userName, password)
+                .onSuccess {
+                    _state.update { it.copy(isLoading = false, isAuthenticated = true) }
+                    updatePushToken()
+                }
+                .onFailure { e ->
+                    _state.update { it.copy(isLoading = false, error = e.message) }
+                }
+        }
+    }
+
+    fun refreshToken() {
+        viewModelScope.launch {
+            repository.refreshToken()
+                .onSuccess {
+                    // Token refreshed successfully
+                }
+                .onFailure {
+                    // Refresh failed, will trigger logout via AuthInterceptor
+                }
+        }
+    }
+
+    private fun updatePushToken() {
+        FirebaseMessaging.getInstance().token.addOnCompleteListener { task ->
+            if (task.isSuccessful) {
+                val token = task.result
+                viewModelScope.launch {
+                    repository.updatePushToken(token)
+                }
+            }
+        }
+    }
+}

client-mobile/auth/presentation/LoginScreen.kt

@@ -0,0 +1,95 @@
+package auth.presentation
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Settings
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.unit.dp
+import ru.knot.messager.R
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun LoginScreen(
+    viewModel: AuthViewModel,
+    onNavigateToRegister: () -> Unit,
+    onNavigateToSettings: () -> Unit,
+    onLoginSuccess: () -> Unit
+) {
+    val state by viewModel.state.collectAsState()
+    var userName by remember { mutableStateOf("") }
+    var password by remember { mutableStateOf("") }
+
+    LaunchedEffect(state.isAuthenticated) {
+        if (state.isAuthenticated) {
+            onLoginSuccess()
+        }
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.login)) },
+                actions = {
+                    IconButton(onClick = onNavigateToSettings) {
+                        Icon(Icons.Default.Settings, contentDescription = stringResource(R.string.settings))
+                    }
+                }
+            )
+        }
+    ) { paddingValues ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(paddingValues)
+                .padding(16.dp),
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.Center
+        ) {
+            OutlinedTextField(
+                value = userName,
+                onValueChange = { userName = it },
+                label = { Text(stringResource(R.string.username)) },
+                modifier = Modifier.fillMaxWidth(),
+                singleLine = true
+            )
+            Spacer(modifier = Modifier.height(8.dp))
+            OutlinedTextField(
+                value = password,
+                onValueChange = { password = it },
+                label = { Text(stringResource(R.string.password)) },
+                modifier = Modifier.fillMaxWidth(),
+                visualTransformation = PasswordVisualTransformation(),
+                singleLine = true
+            )
+            Spacer(modifier = Modifier.height(16.dp))
+            
+            if (state.isLoading) {
+                CircularProgressIndicator()
+            } else {
+                Button(
+                    onClick = { viewModel.login(userName, password) },
+                    modifier = Modifier.fillMaxWidth(),
+                    enabled = userName.isNotBlank() && password.isNotBlank()
+                ) {
+                    Text(stringResource(R.string.login))
+                }
+                TextButton(onClick = onNavigateToRegister) {
+                    Text(stringResource(R.string.no_account_register))
+                }
+            }
+
+            if (state.error != null) {
+                Text(
+                    text = state.error!!,
+                    color = MaterialTheme.colorScheme.error,
+                    modifier = Modifier.padding(top = 8.dp)
+                )
+            }
+        }
+    }
+}

client-mobile/auth/presentation/RegisterScreen.kt

@@ -0,0 +1,106 @@
+package auth.presentation
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.input.PasswordVisualTransformation
+import androidx.compose.ui.unit.dp
+import ru.knot.messager.R
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun RegisterScreen(
+    viewModel: AuthViewModel,
+    onNavigateToLogin: () -> Unit,
+    onRegisterSuccess: () -> Unit
+) {
+    val state by viewModel.state.collectAsState()
+    var userName by remember { mutableStateOf("") }
+    var password by remember { mutableStateOf("") }
+    var confirmPassword by remember { mutableStateOf("") }
+    var errorMessage by remember { mutableStateOf<String?>(null) }
+    
+    val passwordsNotMatchMsg = stringResource(R.string.passwords_not_match)
+
+    LaunchedEffect(state.isAuthenticated) {
+        if (state.isAuthenticated) {
+            onRegisterSuccess()
+        }
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(title = { Text(stringResource(R.string.register)) })
+        }
+    ) { paddingValues ->
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(paddingValues)
+                .padding(16.dp),
+            horizontalAlignment = Alignment.CenterHorizontally,
+            verticalArrangement = Arrangement.Center
+        ) {
+            OutlinedTextField(
+                value = userName,
+                onValueChange = { userName = it },
+                label = { Text(stringResource(R.string.username)) },
+                modifier = Modifier.fillMaxWidth(),
+                singleLine = true
+            )
+            Spacer(modifier = Modifier.height(8.dp))
+            OutlinedTextField(
+                value = password,
+                onValueChange = { password = it },
+                label = { Text(stringResource(R.string.password)) },
+                modifier = Modifier.fillMaxWidth(),
+                visualTransformation = PasswordVisualTransformation(),
+                singleLine = true
+            )
+            Spacer(modifier = Modifier.height(8.dp))
+            OutlinedTextField(
+                value = confirmPassword,
+                onValueChange = { confirmPassword = it },
+                label = { Text(stringResource(R.string.confirm_password)) },
+                modifier = Modifier.fillMaxWidth(),
+                visualTransformation = PasswordVisualTransformation(),
+                singleLine = true
+            )
+            Spacer(modifier = Modifier.height(16.dp))
+
+            if (state.isLoading) {
+                CircularProgressIndicator()
+            } else {
+                Button(
+                    onClick = {
+                        if (password == confirmPassword) {
+                            errorMessage = null
+                            viewModel.register(userName, password)
+                        } else {
+                            errorMessage = passwordsNotMatchMsg
+                        }
+                    },
+                    modifier = Modifier.fillMaxWidth(),
+                    enabled = userName.isNotBlank() && password.isNotBlank() && confirmPassword.isNotBlank()
+                ) {
+                    Text(stringResource(R.string.register))
+                }
+                TextButton(onClick = onNavigateToLogin) {
+                    Text(stringResource(R.string.already_have_account))
+                }
+            }
+
+            val displayError = state.error ?: errorMessage
+            if (displayError != null) {
+                Text(
+                    text = displayError,
+                    color = MaterialTheme.colorScheme.error,
+                    modifier = Modifier.padding(top = 8.dp)
+                )
+            }
+        }
+    }
+}

client-mobile/build.gradle.kts

@@ -0,0 +1,8 @@
+// Top-level build file
+plugins {
+    id("com.android.application") version "8.2.0" apply false
+    id("com.android.library") version "8.2.0" apply false
+    id("org.jetbrains.kotlin.android") version "1.9.22" apply false
+    id("com.google.dagger.hilt.android") version "2.48" apply false
+    id("com.google.gms.google-services") version "4.4.0" apply false
+}

client-mobile/calls/data/remote/CallAudioManager.kt

@@ -0,0 +1,43 @@
+package calls.data.remote
+
+import android.content.Context
+import android.media.AudioAttributes
+import android.media.AudioFocusRequest
+import android.media.AudioManager
+import android.os.Build
+
+class CallAudioManager(private val context: Context) {
+    private val audioManager = context.getSystemService(Context.AUDIO_SERVICE) as AudioManager
+    private var originalMode: Int = AudioManager.MODE_NORMAL
+    private var originalIsSpeakerphoneOn: Boolean = false
+
+    fun startCallMode(isVideoCall: Boolean) {
+        originalMode = audioManager.mode
+        originalIsSpeakerphoneOn = audioManager.isSpeakerphoneOn
+
+        audioManager.mode = AudioManager.MODE_IN_COMMUNICATION
+        setSpeakerphoneOn(isVideoCall)
+
+        // Запрашиваем фокус аудио
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            val playbackAttributes = AudioAttributes.Builder()
+                .setUsage(AudioAttributes.USAGE_VOICE_COMMUNICATION)
+                .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
+                .build()
+            val focusRequest = AudioFocusRequest.Builder(AudioManager.AUDIOFOCUS_GAIN_TRANSIENT)
+                .setAudioAttributes(playbackAttributes)
+                .build()
+            audioManager.requestAudioFocus(focusRequest)
+        }
+    }
+
+    fun setSpeakerphoneOn(on: Boolean) {
+        audioManager.isSpeakerphoneOn = on
+    }
+
+    fun stopCallMode() {
+        audioManager.mode = originalMode
+        audioManager.isSpeakerphoneOn = originalIsSpeakerphoneOn
+        audioManager.abandonAudioFocus(null)
+    }
+}

client-mobile/calls/data/remote/GroupWebRtcManager.kt

@@ -0,0 +1,46 @@
+package calls.data.remote
+
+import android.content.Context
+import org.webrtc.*
+import java.util.concurrent.ConcurrentHashMap
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class GroupWebRtcManager @Inject constructor(private val context: Context) {
+    private val peerConnections = ConcurrentHashMap<String, PeerConnection>()
+    private val factory: PeerConnectionFactory by lazy { createFactory() }
+    
+    private fun createFactory(): PeerConnectionFactory {
+        PeerConnectionFactory.initialize(
+            PeerConnectionFactory.InitializationOptions.builder(context).createInitializationOptions()
+        )
+        return PeerConnectionFactory.builder()
+            .setVideoEncoderFactory(DefaultVideoEncoderFactory(EglBase.create().eglBaseContext, true, true))
+            .setVideoDecoderFactory(DefaultVideoDecoderFactory(EglBase.create().eglBaseContext))
+            .createPeerConnectionFactory()
+    }
+
+    fun addParticipant(userId: String, observer: PeerConnection.Observer): PeerConnection? {
+        val iceServers = listOf(
+            PeerConnection.IceServer.builder("stun:stun.l.google.com:19302").createIceServer()
+        )
+        val pc = factory.createPeerConnection(iceServers, observer)
+        if (pc != null) {
+            peerConnections[userId] = pc
+        }
+        return pc
+    }
+
+    fun removeParticipant(userId: String) {
+        peerConnections[userId]?.dispose()
+        peerConnections.remove(userId)
+    }
+
+    fun getPeerConnection(userId: String): PeerConnection? = peerConnections[userId]
+
+    fun closeAll() {
+        peerConnections.values.forEach { it.dispose() }
+        peerConnections.clear()
+    }
+}

client-mobile/calls/data/remote/WebRtcManager.kt

@@ -0,0 +1,50 @@
+package calls.data.remote
+
+import android.content.Context
+import org.webrtc.*
+import javax.inject.Inject
+import javax.inject.Singleton
+
+@Singleton
+class WebRtcManager @Inject constructor(private val context: Context) {
+    private var peerConnection: PeerConnection? = null
+    private val factory: PeerConnectionFactory by lazy { createFactory() }
+    
+    // Аудио и видео источники
+    private val videoSource by lazy { factory.createVideoSource(false) }
+    private val audioSource by lazy { factory.createAudioSource(MediaConstraints()) }
+
+    private fun createFactory(): PeerConnectionFactory {
+        PeerConnectionFactory.initialize(
+            PeerConnectionFactory.InitializationOptions.builder(context).createInitializationOptions()
+        )
+        return PeerConnectionFactory.builder()
+            .setVideoEncoderFactory(DefaultVideoEncoderFactory(EglBase.create().eglBaseContext, true, true))
+            .setVideoDecoderFactory(DefaultVideoDecoderFactory(EglBase.create().eglBaseContext))
+            .createPeerConnectionFactory()
+    }
+
+    fun initializePeerConnection(observer: PeerConnection.Observer) {
+        val iceServers = listOf(
+            PeerConnection.IceServer.builder("stun:stun.l.google.com:19302").createIceServer()
+        )
+        peerConnection = factory.createPeerConnection(iceServers, observer)
+    }
+
+    fun createOffer(observer: SdpObserver) {
+        peerConnection?.createOffer(observer, MediaConstraints())
+    }
+
+    fun setRemoteDescription(sdp: String, type: SessionDescription.Type, observer: SdpObserver) {
+        peerConnection?.setRemoteDescription(observer, SessionDescription(type, sdp))
+    }
+
+    fun addIceCandidate(candidate: IceCandidate) {
+        peerConnection?.addIceCandidate(candidate)
+    }
+
+    fun close() {
+        peerConnection?.dispose()
+        peerConnection = null
+    }
+}

client-mobile/calls/presentation/CallScreen.kt

@@ -0,0 +1,148 @@
+package calls.presentation
+
+import androidx.compose.animation.*
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.shape.RoundedCornerShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.draw.clip
+import androidx.compose.ui.graphics.Brush
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.layout.ContentScale
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import coil.compose.AsyncImage
+import core.presentation.components.AppAvatar
+import ru.knot.messager.R
+
+@Composable
+fun CallScreen(
+    viewModel: CallViewModel,
+    onBack: () -> Unit
+) {
+    val state by viewModel.state.collectAsState()
+
+    Box(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(
+                Brush.verticalGradient(
+                    colors = listOf(
+                        Color(0xFF0F0F10),
+                        Color(0xFF161618),
+                        Color(0xFF6366F1).copy(alpha = 0.2f)
+                    )
+                )
+            )
+    ) {
+        // Контент звонка (Аватар или Видео)
+        Column(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(top = 100.dp),
+            horizontalAlignment = Alignment.CenterHorizontally
+        ) {
+            AppAvatar(
+                url = state.callerAvatar,
+                name = state.callerName,
+                size = 140.dp
+            )
+            
+            Spacer(modifier = Modifier.height(24.dp))
+            
+            Text(
+                text = state.callerName,
+                style = MaterialTheme.typography.headlineMedium,
+                color = Color.White,
+                fontWeight = FontWeight.Bold
+            )
+            
+            Text(
+                text = when (state.status) {
+                    CallStatus.INCOMING -> "Входящий звонок..."
+                    CallStatus.OUTGOING -> "Вызов..."
+                    CallStatus.CONNECTED -> "00:00" // TODO: Timer
+                    CallStatus.ENDED -> "Звонок завершен"
+                    else -> ""
+                },
+                style = MaterialTheme.typography.bodyLarge,
+                color = Color.White.copy(alpha = 0.7f)
+            )
+        }
+
+        // Кнопки управления (Внизу)
+        Box(
+            modifier = Modifier
+                .align(Alignment.BottomCenter)
+                .padding(bottom = 60.dp)
+                .fillMaxWidth(),
+            contentAlignment = Alignment.Center
+        ) {
+            Row(
+                horizontalArrangement = Arrangement.spacedBy(32.dp),
+                verticalAlignment = Alignment.CenterVertically
+            ) {
+                if (state.status == CallStatus.INCOMING) {
+                    // Кнопка отклонить
+                    CallActionButton(
+                        icon = Icons.Default.CallEnd,
+                        backgroundColor = Color.Red,
+                        onClick = { viewModel.endCall(); onBack() }
+                    )
+                    // Кнопка принять
+                    CallActionButton(
+                        icon = Icons.Default.Call,
+                        backgroundColor = Color(0xFF10B981), // Green
+                        onClick = { viewModel.acceptCall() }
+                    )
+                } else {
+                    // Стандартные кнопки во время разговора
+                    IconButton(
+                        onClick = { /* viewModel.toggleMic() */ },
+                        modifier = Modifier.size(56.dp).clip(CircleShape).background(Color.White.copy(alpha = 0.1f))
+                    ) {
+                        Icon(Icons.Default.Mic, contentDescription = null, tint = Color.White)
+                    }
+
+                    CallActionButton(
+                        icon = Icons.Default.CallEnd,
+                        backgroundColor = Color.Red,
+                        onClick = { viewModel.endCall(); onBack() }
+                    )
+
+                    IconButton(
+                        onClick = { /* viewModel.toggleSpeaker() */ },
+                        modifier = Modifier.size(56.dp).clip(CircleShape).background(Color.White.copy(alpha = 0.1f))
+                    ) {
+                        Icon(Icons.Default.VolumeUp, contentDescription = null, tint = Color.White)
+                    }
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun CallActionButton(
+    icon: androidx.compose.ui.graphics.vector.ImageVector,
+    backgroundColor: Color,
+    onClick: () -> Unit
+) {
+    FloatingActionButton(
+        onClick = onClick,
+        containerColor = backgroundColor,
+        contentColor = Color.White,
+        shape = CircleShape,
+        modifier = Modifier.size(64.dp)
+    ) {
+        Icon(icon, contentDescription = null, modifier = Modifier.size(32.dp))
+    }
+}

client-mobile/calls/presentation/CallViewModel.kt

@@ -0,0 +1,99 @@
+package calls.presentation
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import calls.data.remote.WebRtcManager
+import chats.data.remote.signalr.ChatEvent
+import chats.data.remote.signalr.ChatHubClient
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.*
+import kotlinx.coroutines.launch
+import org.webrtc.*
+import javax.inject.Inject
+
+enum class CallStatus { IDLE, INCOMING, OUTGOING, CONNECTED, ENDED }
+
+data class CallState(
+    val status: CallStatus = CallStatus.IDLE,
+    val chatId: String? = null,
+    val callerName: String = "",
+    val callerAvatar: String? = null,
+    val isMuted: Boolean = false,
+    val isSpeakerOn: Boolean = false,
+    val localVideoTrack: VideoTrack? = null,
+    val remoteVideoTrack: VideoTrack? = null
+)
+
+@HiltViewModel
+class CallViewModel @Inject constructor(
+    private val webRtcManager: WebRtcManager,
+    private val signalrClient: ChatHubClient
+) : ViewModel() {
+
+    private val _state = MutableStateFlow(CallState())
+    val state: StateFlow<CallState> = _state.asStateFlow()
+
+    init {
+        observeSignaling()
+    }
+
+    private fun observeSignaling() {
+        signalrClient.events
+            .onEach { event ->
+                when (event) {
+                    is ChatEvent.CallIncoming -> onIncomingCall(event)
+                    is ChatEvent.CallAnswered -> onCallAnswered(event)
+                    is ChatEvent.IceCandidateReceived -> onIceCandidate(event)
+                    is ChatEvent.CallEnded -> onCallEnded()
+                    else -> Unit
+                }
+            }
+            .launchIn(viewModelScope)
+    }
+
+    private fun onIncomingCall(event: ChatEvent.CallIncoming) {
+        _state.update { it.copy(
+            status = CallStatus.INCOMING,
+            chatId = event.chatId,
+            callerName = "User ${event.from}" // TODO: Load actual user info
+        ) }
+        // Set remote description from offer
+        webRtcManager.setRemoteDescription(event.offer, SessionDescription.Type.OFFER, object : SdpObserver {
+            override fun onCreateSuccess(p0: SessionDescription?) {}
+            override fun onSetSuccess() {}
+            override fun onCreateFailure(p0: String?) {}
+            override fun onSetFailure(p0: String?) {}
+        })
+    }
+
+    private fun onCallAnswered(event: ChatEvent.CallAnswered) {
+        _state.update { it.copy(status = CallStatus.CONNECTED) }
+        webRtcManager.setRemoteDescription(event.answer, SessionDescription.Type.ANSWER, object : SdpObserver {
+            override fun onCreateSuccess(p0: SessionDescription?) {}
+            override fun onSetSuccess() {}
+            override fun onCreateFailure(p0: String?) {}
+            override fun onSetFailure(p0: String?) {}
+        })
+    }
+
+    private fun onIceCandidate(event: ChatEvent.IceCandidateReceived) {
+        // Parse candidate JSON and add to peer connection
+        // webRtcManager.addIceCandidate(...)
+    }
+
+    private fun onCallEnded() {
+        _state.update { it.copy(status = CallStatus.ENDED) }
+        webRtcManager.close()
+    }
+
+    fun acceptCall() {
+        val chatId = _state.value.chatId ?: return
+        // Create answer and send via SignalR
+    }
+
+    fun endCall() {
+        val chatId = _state.value.chatId ?: return
+        // Send call_end via SignalR
+        onCallEnded()
+    }
+}

client-mobile/calls/presentation/GroupCallViewModel.kt

@@ -0,0 +1,87 @@
+package calls.presentation
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import chats.data.remote.signalr.ChatHubClient
+import chats.data.remote.signalr.ChatEvent
+import calls.data.remote.GroupWebRtcManager
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.*
+import kotlinx.coroutines.launch
+import org.webrtc.*
+import javax.inject.Inject
+
+data class ParticipantState(
+    val userId: String,
+    val videoTrack: VideoTrack? = null,
+    val isAudioMuted: Boolean = false,
+    val isVideoDisabled: Boolean = false
+)
+
+data class GroupCallState(
+    val chatId: String? = null,
+    val participants: Map<String, ParticipantState> = emptyMap(),
+    val isMicEnabled: Boolean = true,
+    val isCameraEnabled: Boolean = true
+)
+
+@HiltViewModel
+class GroupCallViewModel @Inject constructor(
+    private val webRtcManager: GroupWebRtcManager,
+    private val signalrClient: ChatHubClient
+) : ViewModel() {
+
+    private val _state = MutableStateFlow(GroupCallState())
+    val state: StateFlow<GroupCallState> = _state.asStateFlow()
+
+    init {
+        observeSignalREvents()
+    }
+
+    private fun observeSignalREvents() {
+        signalrClient.events.onEach { event ->
+            when (event) {
+                is ChatEvent.GroupCallUserJoined -> handleUserJoined(event.userId)
+                is ChatEvent.GroupCallUserLeft -> handleUserLeft(event.userId)
+                is ChatEvent.GroupCallOffer -> handleOffer(event.from, event.offer)
+                is ChatEvent.GroupCallAnswer -> handleAnswer(event.from, event.answer)
+                // Дополнительные обработчики ICE кандидатов и т.д.
+                else -> Unit
+            }
+        }.launchIn(viewModelScope)
+    }
+
+    private fun handleUserJoined(userId: String) {
+        // Создаем PeerConnection для нового участника
+        // Логика идентична портированному CallModal.tsx
+        _state.update { it.copy(participants = it.participants + (userId to ParticipantState(userId))) }
+    }
+
+    private fun handleUserLeft(userId: String) {
+        webRtcManager.removeParticipant(userId)
+        _state.update { it.copy(participants = it.participants - userId) }
+    }
+
+    private fun handleOffer(from: String, sdp: String) {
+        // Установка RemoteDescription и создание Answer
+    }
+
+    private fun handleAnswer(from: String, sdp: String) {
+        // Установка RemoteDescription
+    }
+
+    fun toggleMic() {
+        _state.update { it.copy(isMicEnabled = !it.isMicEnabled) }
+        // Логика управления AudioTrack
+    }
+
+    fun toggleCamera() {
+        _state.update { it.copy(isCameraEnabled = !it.isCameraEnabled) }
+        // Логика управления VideoTrack
+    }
+
+    override fun onCleared() {
+        super.onCleared()
+        webRtcManager.closeAll()
+    }
+}

client-mobile/calls/presentation/components/VideoGrid.kt

@@ -0,0 +1,67 @@
+package calls.presentation.components
+
+import android.view.ViewGroup
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.grid.GridCells
+import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
+import androidx.compose.foundation.lazy.grid.items
+import androidx.compose.runtime.*
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.viewinterop.AndroidView
+import org.webrtc.EglBase
+import org.webrtc.SurfaceViewRenderer
+import org.webrtc.VideoTrack
+
+@Composable
+fun VideoGrid(
+    participants: Map<String, VideoTrack?>,
+    localVideoTrack: VideoTrack?
+) {
+    val eglBaseContext = remember { EglBase.create().eglBaseContext }
+    val allVideoTracks = remember(participants, localVideoTrack) {
+        listOfNotNull(localVideoTrack) + participants.values.filterNotNull()
+    }
+
+    LazyVerticalGrid(
+        columns = GridCells.Fixed(if (allVideoTracks.size <= 2) 1 else 2),
+        modifier = Modifier.fillMaxSize(),
+        contentPadding = PaddingValues(8.dp)
+    ) {
+        items(allVideoTracks) { track ->
+            Box(
+                modifier = Modifier
+                    .padding(4.dp)
+                    .fillMaxWidth()
+                    .aspectRatio(if (allVideoTracks.size == 1) 0.6f else 1f)
+            ) {
+                VideoRenderer(videoTrack = track, eglBaseContext = eglBaseContext)
+            }
+        }
+    }
+}
+
+@Composable
+fun VideoRenderer(
+    videoTrack: VideoTrack,
+    eglBaseContext: EglBase.Context
+) {
+    AndroidView(
+        factory = { context ->
+            SurfaceViewRenderer(context).apply {
+                init(eglBaseContext, null)
+                layoutParams = ViewGroup.LayoutParams(
+                    ViewGroup.LayoutParams.MATCH_PARENT,
+                    ViewGroup.LayoutParams.MATCH_PARENT
+                )
+            }
+        },
+        update = { view ->
+            videoTrack.addSink(view)
+        },
+        onRelease = { view ->
+            videoTrack.removeSink(view)
+            view.release()
+        }
+    )
+}

client-mobile/chats/ARCHITECTURE.md

@@ -0,0 +1,167 @@
+# Архитектура Offline-first для мессенджера Knot
+
+## Обзор
+
+Система кэширования истории чатов реализует паттерн **Offline-first** с использованием:
+- **Room** - локальная база данных
+- **Paging 3** - пагинация с RemoteMediator
+- **WorkManager** - фоновая синхронизация
+- **SignalR** - real-time обновления
+
+## Компоненты
+
+### 1. Data Layer
+
+#### MessageEntity
+```kotlin
+@Entity(tableName = "messages")
+data class MessageEntity(
+    @PrimaryKey val id: String,
+    val chatId: String,
+    val senderId: String,
+    val content: String?,
+    val sequenceId: Int,
+    val createdAt: String,
+    
+    // Поля синхронизации
+    val syncStatus: SyncStatus,      // SYNCED, SYNCING, FAILED
+    val isDeletedLocally: Boolean,   // Помечено на удаление
+    val isEditedLocally: Boolean,    // Помечено на редактирование
+    val editedContent: String?,      // Новое содержимое
+    val lastUpdated: Long            // Время последнего изменения
+)
+```
+
+#### MessageDao
+Основные методы:
+- `getMessagesPagingSource()` - PagingSource для Paging 3
+- `upsertMessage()` - Вставка/обновление с разрешением конфликтов
+- `markAsDeletedLocally()` - Пометка на удаление
+- `markAsEditedLocally()` - Пометка на редактирование
+- `getPendingSyncMessages()` - Получение сообщений для синхронизации
+
+### 2. Pagination (Paging 3)
+
+#### MessageRemoteMediator
+Управляет загрузкой данных:
+- **REFRESH** - первая загрузка последних сообщений
+- **APPEND** - загрузка более старых сообщений (прокрутка вниз)
+- **PREPEND** - загрузка более новых сообщений (прокрутка вверх)
+
+Логика:
+1. Проверяет наличие данных в Room
+2. При необходимости загружает из API
+3. Сохраняет в Room
+4. Paging читает из локальной базы
+
+### 3. Background Sync (WorkManager)
+
+#### MessageSyncWorker
+Обрабатывает отложенную синхронизацию:
+- Отправка новых сообщений (SYNCING)
+- Обновление отредактированных (isEditedLocally = true)
+- Удаление помеченных (isDeletedLocally = true)
+- Повтор при ошибках (FAILED)
+
+Политика повторных попыток:
+- Экспоненциальная задержка
+- Максимум 3 попытки
+- Требуется подключение к сети
+
+### 4. Real-time Updates (SignalR)
+
+#### MessageSignalRHandler
+Обрабатывает события:
+- `new_message` - новое сообщение
+- `message_edited` - редактирование
+- `message_deleted` - удаление
+- `messages_read` - прочтение
+- `reaction_added/removed` - реакции
+
+Все изменения сразу записываются в Room → UI обновляется через Flow
+
+### 5. Repository
+
+#### ChatRepositoryImpl
+Единая точка входа для ViewModel:
+- `getMessagesPaging()` - Paging 3 поток
+- `getMessagesFlow()` - простой Flow списка
+- `sendMessage()` - отправка с локальным сохранением
+- `deleteLocalMessage()` - локальное удаление
+- `editLocalMessage()` - локальное редактирование
+
+## Conflict Resolution
+
+Приоритет данных:
+1. **Сообщения в процессе отправки (SYNCING)** - локальные данные имеют приоритет
+2. **Сообщения в процессе редактирования** - локальные данные имеют приоритет
+3. **Все остальные случаи** - серверные данные имеют приоритет
+
+## Схема работы
+
+### Отправка сообщения
+```
+User → sendMessage() → Сохранение в Room (SYNCING) → UI показывает сообщение
+                     → WorkManager планирует синхронизацию
+                     → Отправка на сервер
+                     → Обновление статуса (SYNCED)
+```
+
+### Получение сообщений
+```
+UI ← getMessagesPaging() ← Room ← RemoteMediator ← API
+                          ↑
+                          └─── SignalR обновления
+```
+
+### Удаление сообщения
+```
+User → deleteLocalMessage() → Пометка (isDeletedLocally = true)
+                            → WorkManager удаляет на сервере
+                            → Удаление из Room
+```
+
+## Использование
+
+### Paging 3 в ViewModel
+```kotlin
+@HiltViewModel
+class ChatViewModel @Inject constructor(
+    private val repository: ChatRepository
+) : ViewModel() {
+    
+    val messages: Flow<PagingData<Message>> = 
+        repository.getMessagesPaging(chatId)
+            .cachedIn(viewModelScope)
+}
+```
+
+### Офлайн отправка
+```kotlin
+// Сообщение сразу появится в UI
+val message = repository.sendMessage(
+    chatId = chatId,
+    content = "Hello"
+)
+
+// Синхронизация произойдёт в фоне
+```
+
+## Миграции
+
+При обновлении схемы БД используется миграция `MIGRATION_1_2`:
+- Добавляет поля синхронизации
+- Сохраняет существующие данные
+- Устанавливает значения по умолчанию
+
+## Тестирование
+
+### Юнит-тесты
+- MessageDao тесты
+- MessageRemoteMediator тесты
+- ChatRepositoryImpl тесты
+
+### Интеграционные тесты
+- Синхронизация с сервером
+- Обработка конфликтов
+- WorkManager сценарии

client-mobile/chats/IMPLEMENTATION_SUMMARY.md

@@ -0,0 +1,178 @@
+# Сводка реализации системы кэширования
+
+## 📁 Созданные файлы
+
+### Data Layer
+1. **core/database/data/ChatDatabase.kt** (обновлён)
+   - Добавлены поля синхронизации в MessageEntity
+   - Расширен MessageDao методами для Paging и офлайн-операций
+   - Добавлен SyncStatusConverter для Room
+
+2. **core/database/data/Migrations.kt** (новый)
+   - Миграция MIGRATION_1_2 для обновления схемы БД
+
+3. **core/di/DatabaseModule.kt** (обновлён)
+   - Добавлена миграция
+   - Изменено имя БД на константу
+
+4. **core/di/WorkManagerModule.kt** (новый)
+   - DI модуль для WorkManager
+
+### Paging 3
+5. **chats/data/paging/MessageRemoteMediator.kt** (новый)
+   - RemoteMediator для загрузки данных из сети
+   - Управление пагинацией (REFRESH, APPEND, PREPEND)
+   - Сохранение в Room
+
+6. **chats/data/paging/MessagePagingSource.kt** (новый)
+   - PagingSource для чтения из Room
+
+### Sync (WorkManager)
+7. **chats/data/sync/MessageSyncWorker.kt** (новый)
+   - Worker для фоновой синхронизации
+   - Обработка отправки, редактирования, удаления
+   - Политика повторных попыток (exponential backoff)
+
+### SignalR Integration
+8. **chats/data/signalr/MessageSignalRHandler.kt** (новый)
+   - Обработчик SignalR событий
+   - Обновление локального кэша в реальном времени
+   - Разрешение конфликтов
+
+### Repository
+9. **chats/domain/repository/ChatRepository.kt** (обновлён)
+   - Добавлен метод getMessagesPaging()
+   - Добавлены editLocalMessage()
+
+10. **chats/data/repository/ChatRepositoryImpl.kt** (обновлён)
+    - Полная реализация Offline-first
+    - Интеграция Paging 3, SignalR, WorkManager
+    - Conflict Resolution логика
+
+### DI
+11. **chats/di/ChatModule.kt** (обновлён)
+    - Регистрация MessageSignalRHandler
+    - Обновлён ChatRepositoryImpl с новыми зависимостями
+
+### Domain Models
+12. **chats/domain/model/ChatModels.kt** (обновлён)
+    - Добавлен ChatMember
+    - Добавлено поле members в Chat
+
+### Application
+13. **app/src/main/kotlin/com/knot/messenger/MainApplication.kt** (обновлён)
+    - Реализация Configuration.Provider для WorkManager
+    - Интеграция Hilt WorkerFactory
+
+### Документация
+14. **chats/ARCHITECTURE.md** (новый)
+    - Описание архитектуры
+    - Схема работы компонентов
+
+15. **chats/USAGE_EXAMPLES.md** (новый)
+    - Примеры использования
+    - Best practices
+
+## 🔧 Изменения в зависимостях (app/build.gradle.kts)
+
+Добавлено:
+```kotlin
+// Paging 3
+implementation("androidx.paging:paging-runtime-ktx:3.2.1")
+implementation("androidx.paging:paging-compose:3.2.1")
+
+// WorkManager + Hilt
+implementation("androidx.work:work-runtime-ktx:2.9.0")
+implementation("androidx.hilt:hilt-work:1.1.0")
+kapt("androidx.hilt:hilt-compiler:1.1.0")
+```
+
+## 🏗️ Архитектурные решения
+
+### 1. Offline-first подход
+- Все данные читаются из локальной Room базы
+- Сетевые запросы только для синхронизации
+- UI всегда работает с локальными данными
+
+### 2. Paging 3 с RemoteMediator
+- Единый источник истины - Room
+- RemoteMediator управляет загрузкой из сети
+- Автоматическая инвалидация при изменениях
+
+### 3. Conflict Resolution
+- **SYNCING/EDITING**: локальные данные имеют приоритет
+- **SYNCED**: серверные данные имеют приоритет
+- SignalR события применяются аккуратно
+
+### 4. Background Sync
+- WorkManager для надёжной доставки
+- Exponential backoff при ошибках
+- Требуется NetzwerkType.CONNECTED
+
+### 5. Real-time Updates
+- SignalR события → Room → Flow → UI
+- Автоматическое обновление UI
+- Минимальная задержка
+
+## 📊 Схема потока данных
+
+```
+┌─────────────┐     ┌──────────────┐     ┌─────────────┐
+│    SignalR  │────▶│  SignalR     │────▶│    Room     │
+│   (Server)  │     │   Handler    │     │  (SQLite)   │
+└─────────────┘     └──────────────┘     └──────┬──────┘
+                                                 │
+┌─────────────┐     ┌──────────────┐     ┌──────▼──────┐
+│     API     │◀───▶│  Remote      │◀───▶│   Paging    │
+│  (Retrofit) │     │  Mediator    │     │  Source     │
+└─────────────┘     └──────────────┘     └──────┬──────┘
+                                                 │
+┌─────────────┐     ┌──────────────┐     ┌──────▼──────┐
+│  WorkManager│◀───▶│   Repository │◀───▶│     UI      │
+│   (Sync)    │     │              │     │   (Flow)    │
+└─────────────┘     └──────────────┘     └─────────────┘
+```
+
+## ✅ Checklist реализации
+
+- [x] MessageEntity с полями синхронизации
+- [x] MessageDao с PagingSource методами
+- [x] MessageRemoteMediator для Paging 3
+- [x] MessageSyncWorker для WorkManager
+- [x] MessageSignalRHandler для real-time
+- [x] ChatRepositoryImpl с полной логикой
+- [x] DI модули обновлены
+- [x] Миграция БД
+- [x] Hilt Worker интеграция
+- [x] Документация
+
+## 🚀 Следующие шаги
+
+1. **Тестирование**
+   - Юнит-тесты для MessageDao
+   - Интеграционные тесты для Repository
+   - UI тесты с Paging 3
+
+2. **Мониторинг**
+   - Логирование синхронизации
+   - Метрики ошибок
+   - Analytics офлайн-режима
+
+3. **Оптимизация**
+   - Индексы в БД для производительности
+   - Кэширование изображений
+   - Оптимизация запросов
+
+4. **Улучшения**
+   - Поиск по сообщениям
+   - Избранные сообщения
+   - Архивация чатов
+
+## 🔍 Ключевые особенности
+
+1. **Мгновенный UI** - сообщения появляются сразу
+2. **Надёжная синхронизация** - WorkManager гарантирует доставку
+3. **Real-time** - SignalR для мгновенных обновлений
+4. **Офлайн-работа** - полное функционирование без сети
+5. **Разрешение конфликтов** - умная логика приоритетов
+6. **Пагинация** - эффективная работа с большими чатами

client-mobile/chats/INTEGRATION_GUIDE.md

@@ -0,0 +1,296 @@
+# Руководство по интеграции
+
+## Быстрый старт
+
+### 1. Добавление зависимостей
+
+В `app/build.gradle.kts` уже добавлены:
+```kotlin
+// Paging 3
+implementation("androidx.paging:paging-runtime-ktx:3.2.1")
+implementation("androidx.paging:paging-compose:3.2.1")
+
+// WorkManager + Hilt
+implementation("androidx.work:work-runtime-ktx:2.9.0")
+implementation("androidx.hilt:hilt-work:1.1.0")
+kapt("androidx.hilt:hilt-compiler:1.1.0")
+```
+
+### 2. Обновление Application класса
+
+`MainApplication.kt` уже обновлён:
+```kotlin
+@HiltAndroidApp
+class MainApplication : Application(), ImageLoaderFactory, Configuration.Provider {
+    @Inject lateinit var workerFactory: WorkerFactory
+    
+    override val workManagerConfiguration: Configuration
+        get() = Configuration.Builder()
+            .setWorkerFactory(workerFactory)
+            .setMinimumLoggingLevel(android.util.Log.INFO)
+            .build()
+}
+```
+
+### 3. Миграция базы данных
+
+База данных автоматически обновится при первом запуске благодаря `MIGRATION_1_2`.
+
+## Использование в ViewModel
+
+### Вариант 1: Paging 3 (рекомендуется для больших чатов)
+
+```kotlin
+@HiltViewModel
+class ChatViewModel @Inject constructor(
+    private val repository: ChatRepository,
+    savedStateHandle: SavedStateHandle
+) : ViewModel() {
+    
+    private val chatId: String = savedStateHandle["chatId"] ?: ""
+    
+    val messages: Flow<PagingData<Message>> = repository
+        .getMessagesPaging(chatId)
+        .cachedIn(viewModelScope)
+    
+    fun sendMessage(content: String) {
+        viewModelScope.launch {
+            repository.sendMessage(chatId, content, "text")
+        }
+    }
+    
+    fun deleteMessage(messageId: String) {
+        viewModelScope.launch {
+            repository.deleteLocalMessage(messageId)
+        }
+    }
+}
+```
+
+### Вариант 2: Простой Flow (для небольших чатов)
+
+```kotlin
+@HiltViewModel
+class ChatViewModel @Inject constructor(
+    private val repository: ChatRepository,
+    savedStateHandle: SavedStateHandle
+) : ViewModel() {
+    
+    private val chatId: String = savedStateHandle["chatId"] ?: ""
+    
+    val messages: Flow<List<Message>> = repository
+        .getMessagesFlow(chatId)
+        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(5000), emptyList())
+}
+```
+
+## Использование в UI (Compose)
+
+### С Paging 3
+
+```kotlin
+@Composable
+fun ChatScreen(viewModel: ChatViewModel = hiltViewModel()) {
+    val messages by viewModel.messages.collectAsLazyPagingItems()
+    
+    LazyColumn(
+        reverseLayout = true, // Сообщения снизу вверх
+        modifier = Modifier.fillMaxSize()
+    ) {
+        items(
+            count = messages.itemCount,
+            key = messages.key
+        ) { index ->
+            messages[index]?.let { message ->
+                MessageItem(message = message)
+            }
+        }
+        
+        // Индикатор загрузки
+        when {
+            messages.loadState.refresh is LoadState.Loading -> {
+                item { LoadingIndicator() }
+            }
+            messages.loadState.append is LoadState.Loading -> {
+                item { LoadingIndicator() }
+            }
+        }
+        
+        // Ошибки
+        messages.loadState.append.let { loadState ->
+            if (loadState is LoadState.Error) {
+                item {
+                    Text("Ошибка: ${loadState.error.message}")
+                    Button(onClick = { messages.retry() }) {
+                        Text("Повторить")
+                    }
+                }
+            }
+        }
+    }
+}
+```
+
+### С простым Flow
+
+```kotlin
+@Composable
+fun ChatScreen(viewModel: ChatViewModel = hiltViewModel()) {
+    val messages by viewModel.messages.collectAsState()
+    
+    LazyColumn(reverseLayout = true) {
+        items(messages) { message ->
+            MessageItem(message = message)
+        }
+    }
+}
+```
+
+## Отправка сообщения
+
+```kotlin
+// Мгновенное отображение в UI
+viewModel.sendMessage("Привет!")
+
+// Сообщение сохраняется локально и появляется в UI сразу
+// WorkManager отправит его на сервер в фоне
+```
+
+## Удаление сообщения
+
+```kotlin
+// Мягкое удаление (через WorkManager)
+viewModel.deleteMessage(messageId)
+
+// Или немедленное удаление
+viewModelScope.launch {
+    repository.deleteMessage(messageId, forEveryone = false)
+}
+```
+
+## Редактирование сообщения
+
+```kotlin
+viewModelScope.launch {
+    repository.editLocalMessage(messageId, "Новый текст")
+}
+```
+
+## Мониторинг синхронизации
+
+```kotlin
+// В ViewModel
+val syncStatus: Flow<List<MessageEntity>> = messageDao
+    .getPendingSyncMessagesFlow()
+    .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), emptyList())
+
+// В UI
+val pendingMessages by syncStatus.collectAsState()
+if (pendingMessages.isNotEmpty()) {
+    Text("${pendingMessages.size} сообщений ожидают отправки")
+}
+```
+
+## Обработка офлайн-режима
+
+```kotlin
+@Composable
+fun MessageItem(message: Message) {
+    val isPending = message.id.startsWith("local_")
+    
+    Row(modifier = Modifier.fillMaxWidth()) {
+        Text(
+            text = message.content ?: "",
+            modifier = Modifier.weight(1f)
+        )
+        
+        // Индикатор отправки
+        if (isPending) {
+            CircularProgressIndicator(
+                modifier = Modifier.size(16.dp),
+                strokeWidth = 2.dp
+            )
+        }
+        
+        // Статус прочтения
+        Icon(
+            imageVector = if (message.isRead) Icons.Default.DoneAll else Icons.Default.Done,
+            contentDescription = null
+        )
+    }
+}
+```
+
+## Проверка сборки
+
+```bash
+cd client-mobile
+./gradlew assembleDebug
+```
+
+## Возможные проблемы и решения
+
+### 1. Ошибка: "WorkerFactory not found"
+**Решение:** Убедитесь, что `MainApplication` реализует `Configuration.Provider`
+
+### 2. Ошибка: "Table messages has no column named syncStatus"
+**Решение:** Проверьте, что миграция `MIGRATION_1_2` добавлена в `DatabaseModule`
+
+### 3. Paging не загружает данные
+**Решение:** Проверьте логи `MessageRemoteMediator` - возможны проблемы с API
+
+### 4. Сообщения не синхронизируются
+**Решение:** Проверьте WorkManager логи и наличие сетевого подключения
+
+### 5. SignalR не подключается
+**Решение:** Проверьте `ChatHubClient.connect()` - должен вызываться после авторизации
+
+## Тестирование
+
+### Юнит-тесты
+
+```kotlin
+@Test
+fun `message saved locally should have SYNCING status`() = runTest {
+    val message = MessageEntity(
+        id = "test",
+        chatId = "chat1",
+        // ...
+        syncStatus = SyncStatus.SYNCING
+    )
+    dao.insertMessage(message)
+    
+    val saved = dao.getMessageById("test")
+    assertEquals(SyncStatus.SYNCING, saved?.syncStatus)
+}
+```
+
+### Интеграционные тесты
+
+```kotlin
+@Test
+fun `sending message should save locally and sync to server`() = runTest {
+    // Arrange
+    val repository = ChatRepositoryImpl(...)
+    
+    // Act
+    val message = repository.sendMessage("chat1", "Hello", "text")
+    
+    // Assert
+    assertTrue(message.id.startsWith("local_"))
+    
+    // Wait for sync
+    delay(5000)
+    
+    val synced = dao.getMessageById(message.id)
+    assertEquals(SyncStatus.SYNCED, synced?.syncStatus)
+}
+```
+
+## Дополнительные ресурсы
+
+- [Paging 3 Documentation](https://developer.android.com/topic/libraries/architecture/paging/v3-overview)
+- [WorkManager Documentation](https://developer.android.com/topic/libraries/architecture/workmanager)
+- [Room Documentation](https://developer.android.com/training/data-storage/room)
+- [ARCHITECTURE.md](ARCHITECTURE.md) - детальное описание архитектуры
+- [USAGE_EXAMPLES.md](USAGE_EXAMPLES.md) - больше примеров использования

client-mobile/chats/USAGE_EXAMPLES.md

@@ -0,0 +1,262 @@
+# Примеры использования системы кэширования
+
+## 1. Paging 3 в ViewModel
+
+```kotlin
+@HiltViewModel
+class ChatViewModel @Inject constructor(
+    private val repository: ChatRepository,
+    savedStateHandle: SavedStateHandle
+) : ViewModel() {
+    
+    private val chatId: String = savedStateHandle["chatId"] ?: ""
+    
+    // Paging 3 поток для UI
+    val messages: Flow<PagingData<Message>> = repository
+        .getMessagesPaging(chatId)
+        .cachedIn(viewModelScope)
+    
+    // Простой Flow для небольших чатов
+    val messagesList: Flow<List<Message>> = repository
+        .getMessagesFlow(chatId)
+}
+```
+
+## 2. UI с Paging 3 (Jetpack Compose)
+
+```kotlin
+@Composable
+fun ChatScreen(viewModel: ChatViewModel = hiltViewModel()) {
+    val messages by viewModel.messages.collectAsLazyPagingItems()
+    
+    LazyColumn {
+        items(
+            count = messages.itemCount,
+            key = messages.key
+        ) { index ->
+            val message = messages[index]
+            message?.let {
+                MessageItem(message = it)
+            }
+        }
+        
+        // Индикаторы загрузки
+        when {
+            messages.loadState.refresh is LoadState.Loading -> {
+                item { LoadingIndicator() }
+            }
+            messages.loadState.append is LoadState.Loading -> {
+                item { LoadingIndicator() }
+            }
+            messages.loadState.prepend is LoadState.Loading -> {
+                item { LoadingIndicator() }
+            }
+        }
+        
+        // Обработка ошибок
+        messages.loadState.append.let { loadState ->
+            if (loadState is LoadState.Error) {
+                item {
+                    ErrorView(
+                        message = loadState.error.message,
+                        onRetry = { messages.retry() }
+                    )
+                }
+            }
+        }
+    }
+}
+```
+
+## 3. Отправка сообщения (Offline-first)
+
+```kotlin
+@HiltViewModel
+class ChatViewModel @Inject constructor(
+    private val repository: ChatRepository
+) : ViewModel() {
+    
+    fun sendMessage(chatId: String, content: String) {
+        viewModelScope.launch {
+            try {
+                // Сообщение сразу сохраняется локально и появляется в UI
+                val message = repository.sendMessage(
+                    chatId = chatId,
+                    content = content,
+                    type = "text"
+                )
+                
+                // UI обновляется мгновенно через Flow
+                Log.d("ChatViewModel", "Message saved locally: ${message.id}")
+                
+                // Синхронизация с сервером произойдёт в фоне
+            } catch (e: Exception) {
+                Log.e("ChatViewModel", "Failed to send message", e)
+            }
+        }
+    }
+}
+```
+
+## 4. Удаление сообщения
+
+```kotlin
+fun deleteMessage(messageId: String) {
+    viewModelScope.launch {
+        // Локальное удаление (сообщение скрывается из UI)
+        repository.deleteLocalMessage(messageId)
+        
+        // WorkManager удалит сообщение на сервере в фоне
+        // При получении подтверждения - сообщение удаляется из БД
+    }
+}
+
+// Или немедленное удаление (если онлайн)
+fun deleteMessageImmediately(messageId: String, forEveryone: Boolean) {
+    viewModelScope.launch {
+        repository.deleteMessage(messageId, forEveryone)
+    }
+}
+```
+
+## 5. Редактирование сообщения
+
+```kotlin
+fun editMessage(messageId: String, newContent: String) {
+    viewModelScope.launch {
+        // Локальное редактирование
+        repository.editLocalMessage(messageId, newContent)
+        
+        // UI обновляется мгновенно
+        // WorkManager отправит изменения на сервер в фоне
+    }
+}
+```
+
+## 6. Отслеживание статуса синхронизации
+
+```kotlin
+// Наблюдение за сообщениями, ожидающими синхронизации
+fun observePendingMessages() {
+    viewModelScope.launch {
+        messageDao.getPendingSyncMessagesFlow().collect { messages ->
+            if (messages.isNotEmpty()) {
+                Log.d("Sync", "${messages.size} messages pending sync")
+            }
+        }
+    }
+}
+
+// Проверка статуса конкретного сообщения
+fun isMessageSynced(messageId: String): Boolean {
+    return runBlocking {
+        val message = messageDao.getMessageById(messageId)
+        message?.syncStatus == SyncStatus.SYNCED
+    }
+}
+```
+
+## 7. Обработка ошибок синхронизации
+
+```kotlin
+fun retryFailedMessages() {
+    viewModelScope.launch {
+        val failedMessages = messageDao.getFailedSyncMessages()
+        
+        failedMessages.forEach { message ->
+            when {
+                message.isDeletedLocally -> {
+                    // Повторить удаление
+                    MessageSyncWorker.scheduleSync(context)
+                }
+                message.isEditedLocally -> {
+                    // Повторить редактирование
+                    MessageSyncWorker.scheduleSync(context)
+                }
+                else -> {
+                    // Повторить отправку
+                    MessageSyncWorker.scheduleSync(context)
+                }
+            }
+        }
+    }
+}
+```
+
+## 8. Прочтение сообщений
+
+```kotlin
+fun markAsRead(chatId: String, lastMessageId: String, lastReadSequenceId: Int) {
+    viewModelScope.launch {
+        // Отправляем статус прочтения через SignalR
+        repository.markMessagesAsRead(chatId, lastMessageId, lastReadSequenceId)
+        
+        // Локальная база обновляется автоматически
+    }
+}
+```
+
+## 9. Real-time обновления
+
+SignalR события обрабатываются автоматически:
+- Новые сообщения появляются в UI мгновенно
+- Редактирования/удаления синхронизируются
+- Статусы прочтения обновляются
+- Реакции отображаются в реальном времени
+
+```kotlin
+// Обработчик SignalR уже интегрирован в ChatRepositoryImpl
+// Дополнительные действия можно добавить в MessageSignalRHandler
+```
+
+## 10. Кэширование в ViewModel
+
+```kotlin
+@HiltViewModel
+class ChatViewModel @Inject constructor(
+    private val repository: ChatRepository,
+    savedStateHandle: SavedStateHandle
+) : ViewModel() {
+    
+    private val chatId: String = savedStateHandle["chatId"] ?: ""
+    
+    // Кэшируем PagingData в scope ViewModel
+    val messages: Flow<PagingData<Message>> = repository
+        .getMessagesPaging(chatId)
+        .cachedIn(viewModelScope)  // Важно для сохранения состояния
+    
+    // При повороте экрана пагинация сохраняется
+}
+```
+
+## Рекомендации
+
+### 1. Выбор между Paging 3 и Flow
+- **Paging 3** - для больших чатов (>100 сообщений)
+- **Flow<List>** - для небольших чатов или когда нужна вся история сразу
+
+### 2. Обработка офлайн-режима
+```kotlin
+// UI должен показывать статус сообщения
+@Composable
+fun MessageItem(message: Message) {
+    val isPending = message.id.startsWith("local_")
+    
+    Row {
+        Text(text = message.content)
+        if (isPending) {
+            CircularProgressIndicator(modifier = Modifier.size(12.dp))
+        }
+    }
+}
+```
+
+### 3. Конфликты данных
+- Локальные изменения имеют приоритет во время отправки
+- Серверные данные перезаписывают локальные после SYNCED
+- SignalR события всегда применяются к актуальным данным
+
+### 4. Производительность
+- Используйте `cachedIn(viewModelScope)` для PagingData
+- Избегайте частых вызовов `getMessages()` из сети
+- Позволяйте WorkManager управлять синхронизацией

client-mobile/chats/data/paging/MessagePagingSource.kt

@@ -0,0 +1,80 @@
+package chats.data.paging
+
+import androidx.paging.PagingSource
+import androidx.paging.PagingState
+import core.database.data.MessageDao
+import core.database.data.MessageEntity
+import android.util.Log
+
+/**
+ * PagingSource для загрузки сообщений из локальной базы Room
+ * Данные сортируются по sequenceId DESC (новые сообщения первыми)
+ */
+class MessagePagingSource(
+    private val dao: MessageDao,
+    private val chatId: String
+) : PagingSource<Int, MessageEntity>() {
+
+    companion object {
+        private const val TAG = "MessagePagingSource"
+    }
+
+    override fun getRefreshKey(state: PagingState<Int, MessageEntity>): Int? {
+        Log.d(TAG, "getRefreshKey() called")
+        return state.anchorPosition?.let { anchorPosition ->
+            val anchorPage = state.closestPageToPosition(anchorPosition)
+            anchorPage?.prevKey?.plus(1) ?: anchorPage?.nextKey?.minus(1)
+        }
+    }
+
+    override suspend fun load(params: LoadParams<Int>): LoadResult<Int, MessageEntity> {
+        Log.d(TAG, ">>> load() called with: position=${params.key}, loadSize=${params.loadSize}")
+        return try {
+            // При DESC порядке:
+            // - key = sequenceId последнего сообщения в текущей странице
+            // - APPEND = загружаем сообщения С МЕНЬШИМ sequenceId (старые)
+            // - PREPEND = загружаем сообщения С БОЛЬШИМ sequenceId (новые)
+            
+            val position = params.key  // sequenceId граничного сообщения
+            val loadSize = params.loadSize
+
+            Log.d(TAG, "Loading: chatId=$chatId, position=$position, loadSize=$loadSize")
+
+            val messages = if (position == null) {
+                // Первая загрузка - получаем самые последние сообщения (включая maxSeq)
+                val maxSeq = dao.getMaxSequenceId(chatId)
+                Log.d(TAG, "First load: maxSeq=$maxSeq")
+                if (maxSeq == null) {
+                    Log.d(TAG, "No messages in database")
+                    emptyList()
+                } else {
+                    // Используем <= чтобы включить самое последнее сообщение
+                    dao.getMessagesUpToAndIncluding(chatId, maxSeq, loadSize)
+                }
+            } else {
+                // Загружаем сообщения с sequenceId < position (старые)
+                Log.d(TAG, "Append: loading messages before sequenceId=$position")
+                dao.getMessagesBefore(chatId, position, loadSize)
+            }
+            
+            Log.d(TAG, "Loaded ${messages.size} messages, first=${messages.firstOrNull()?.sequenceId}, last=${messages.lastOrNull()?.sequenceId}")
+
+            // Для DESC порядка:
+            // - prevKey = максимальный sequenceId в странице (для загрузки новых)
+            // - nextKey = минимальный sequenceId в странице (для загрузки старых)
+            val prevKey = messages.firstOrNull()?.sequenceId?.plus(1)
+            val nextKey = messages.lastOrNull()?.sequenceId?.minus(1)
+
+            Log.d(TAG, "prevKey=$prevKey, nextKey=$nextKey")
+
+            LoadResult.Page(
+                data = messages,
+                prevKey = prevKey,
+                nextKey = nextKey
+            )
+        } catch (e: Exception) {
+            Log.e(TAG, "Error loading messages", e)
+            LoadResult.Error(e)
+        }
+    }
+}

client-mobile/chats/data/paging/MessageRemoteMediator.kt

@@ -0,0 +1,203 @@
+package chats.data.paging
+
+import android.util.Log
+import androidx.paging.*
+import chats.data.remote.api.ChatApi
+import chats.data.remote.dto.MessageDto
+import chats.domain.model.MediaType
+import com.google.gson.Gson
+import core.database.data.ChatDatabase
+import core.database.data.MessageDao
+import core.database.data.MessageEntity
+import core.database.data.SyncStatus
+import core.network.ServerConfig
+import core.security.TokenManager
+
+/**
+ * RemoteMediator для Paging 3
+ * Управляет загрузкой сообщений из сети и кэшированием в Room
+ * 
+ * Логика работы:
+ * 1. При первой загрузке (REFRESH) - загружаем последние сообщения
+ * 2. При прокрутке вниз (APPEND) - загружаем более старые сообщения
+ * 3. При прокрутке вверх (PREPEND) - загружаем более новые сообщения
+ * 4. Данные сохраняются в Room, Paging читает из базы
+ */
+@OptIn(ExperimentalPagingApi::class)
+class MessageRemoteMediator(
+    private val chatId: String,
+    private val api: ChatApi,
+    private val database: ChatDatabase,
+    private val dao: core.database.data.MessageDao,
+    private val serverConfig: ServerConfig,
+    private val tokenManager: TokenManager
+) : RemoteMediator<Int, MessageEntity>() {
+
+    private val gson = Gson()
+    private val baseUrl = serverConfig.getBaseUrl().removeSuffix("/api/")
+
+    /**
+     * Состояние пагинации
+     */
+    data class MessageRemoteMediatorState(
+        val lastSequenceId: Int?,
+        val firstSequenceId: Int?
+    )
+
+    override suspend fun initialize(): InitializeAction {
+        // Всегда запускаем refresh для проверки кэша
+        return InitializeAction.LAUNCH_INITIAL_REFRESH
+    }
+
+    override suspend fun load(
+        loadType: LoadType,
+        state: PagingState<Int, MessageEntity>
+    ): MediatorResult {
+        Log.d(TAG, ">>> load() loadType=$loadType")
+        return try {
+            // Проверяем наличие данных в локальной БД
+            val localMinSeq = dao.getMinSequenceId(chatId)
+            val localMaxSeq = dao.getMaxSequenceId(chatId)
+            Log.d(TAG, "Local DB: minSeq=$localMinSeq, maxSeq=$localMaxSeq")
+
+            when (loadType) {
+                LoadType.REFRESH -> {
+                    // Если есть локальные данные - не делаем API запрос
+                    if (localMaxSeq != null) {
+                        Log.d(TAG, "REFRESH: Using cached data (maxSeq=$localMaxSeq)")
+                        return MediatorResult.Success(endOfPaginationReached = false)
+                    }
+                    // Нет данных - загружаем последние сообщения
+                    Log.d(TAG, "REFRESH: No cached data, fetching from API")
+                }
+                LoadType.APPEND -> {
+                    Log.d(TAG, "APPEND: Loading older messages")
+                }
+                LoadType.PREPEND -> {
+                    Log.d(TAG, "PREPEND: Loading newer messages")
+                }
+            }
+
+            // Определяем pivot для API запроса
+            val pivotValue: Long? = when (loadType) {
+                LoadType.REFRESH -> null  // Последние сообщения
+                LoadType.APPEND -> {
+                    // Старые сообщения - берём минимальный sequenceId из текущей страницы
+                    (state.pages.lastOrNull()?.data?.lastOrNull()?.sequenceId
+                        ?: localMinSeq)?.toLong()?.minus(1)
+                }
+                LoadType.PREPEND -> {
+                    // Новые сообщения - берём максимальный sequenceId
+                    (state.pages.firstOrNull()?.data?.firstOrNull()?.sequenceId
+                        ?: localMaxSeq)?.toLong()?.plus(1)
+                }
+            }
+
+            val limit = when (loadType) {
+                LoadType.REFRESH -> state.config.initialLoadSize
+                else -> state.config.pageSize
+            }
+
+            Log.d(TAG, "API call: chatId=$chatId, pivot=$pivotValue, limit=$limit")
+
+            // Выполняем запрос к API
+            val messages = try {
+                api.getMessages(
+                    chatId = chatId,
+                    cursor = null,
+                    pivot = pivotValue,
+                    limit = limit
+                )
+            } catch (e: Exception) {
+                Log.e(TAG, "API call failed - offline?", e)
+                // При ошибке сети и наличии локальных данных - успех
+                if ((localMinSeq != null || localMaxSeq != null)) {
+                    Log.d(TAG, "Offline mode: returning success with cached data")
+                    return MediatorResult.Success(endOfPaginationReached = true)
+                }
+                throw e
+            }
+
+            Log.d(TAG, "Received ${messages.size} messages from API")
+
+            if (messages.isEmpty()) {
+                Log.d(TAG, "End of pagination - no more messages")
+                return MediatorResult.Success(endOfPaginationReached = true)
+            }
+
+            // Сохраняем в базу
+            val currentUserId = tokenManager.getUserId() ?: ""
+            val entities = messages.map { dto -> 
+                dto.toEntity(currentUserId, baseUrl, gson) 
+            }
+            Log.d(TAG, "Saving ${entities.size} messages to DB, first seq=${entities.firstOrNull()?.sequenceId}, last seq=${entities.lastOrNull()?.sequenceId}")
+            dao.upsertMessages(entities)
+
+            // Проверяем что данные сохранились
+            val savedCount = dao.getMessagesCount(chatId)
+            Log.d(TAG, "Total messages in DB after save: $savedCount")
+
+            val endOfPaginationReached = messages.size < limit
+            Log.d(TAG, "endOfPaginationReached=$endOfPaginationReached")
+            MediatorResult.Success(endOfPaginationReached = endOfPaginationReached)
+
+        } catch (e: Exception) {
+            Log.e(TAG, "Error loading messages", e)
+            MediatorResult.Error(e)
+        }
+    }
+
+    companion object {
+        private const val TAG = "MessageRemoteMediator"
+    }
+}
+
+/**
+ * Extension function для преобразования DTO в Entity
+ */
+private fun MessageDto.toEntity(
+    currentUserId: String,
+    baseUrl: String,
+    gson: Gson
+): MessageEntity {
+    // Определяем тип медиа
+    val mediaType = when {
+        media.isEmpty() -> MediaType.TEXT.name
+        media.any { it.type.startsWith("image") || it.url.endsWith(".gif") } -> MediaType.GIF.name
+        media.any { it.type.startsWith("image") } -> MediaType.IMAGE.name
+        media.any { it.type.startsWith("video") } -> MediaType.VIDEO.name
+        media.any { it.type.startsWith("audio") } -> MediaType.AUDIO.name
+        else -> MediaType.FILE.name
+    }
+
+    // Сериализуем медиа в JSON
+    val mediaJson = gson.toJson(media)
+
+    // Сериализуем реакции в JSON
+    val reactionsMap = reactions?.associate { it.emoji to it.count } ?: emptyMap()
+    val reactionsJson = gson.toJson(reactionsMap)
+
+    // Определяем, прочитано ли сообщение текущим пользователем
+    val isRead = senderId == currentUserId
+
+    return MessageEntity(
+        id = id,
+        chatId = chatId ?: "",
+        senderId = senderId ?: "",
+        senderName = sender?.displayName ?: sender?.username ?: "Unknown",
+        senderAvatar = sender?.avatarUrl,
+        content = content,
+        sequenceId = sequenceId ?: 0,
+        createdAt = createdAt ?: "",
+        mediaType = mediaType,
+        mediaJson = mediaJson,
+        reactionsJson = reactionsJson,
+        isRead = isRead,
+        replyToId = replyTo?.id,
+        syncStatus = SyncStatus.SYNCED,
+        isDeletedLocally = false,
+        isEditedLocally = false,
+        editedContent = null,
+        lastUpdated = System.currentTimeMillis()
+    )
+}

client-mobile/chats/data/remote/api/ChatApi.kt

@@ -0,0 +1,124 @@
+package chats.data.remote.api
+
+import chats.data.remote.dto.ChatDto
+import chats.data.remote.dto.MessageDto
+import retrofit2.http.*
+
+data class SendMessageRequest(
+    val content: String?,
+    val type: String = "text",
+    val attachments: List<AttachmentRequest>? = null,
+    val replyToId: String? = null,
+    val quote: String? = null,
+    val forwardedFromId: String? = null
+)
+
+data class AttachmentRequest(
+    val type: String,
+    val url: String,
+    val fileName: String,
+    val fileSize: Long
+)
+
+interface ChatApi {
+    @GET("chats")
+    suspend fun getChats(): List<ChatDto>
+
+    @GET("messages/chat/{chatId}")
+    suspend fun getMessages(
+        @Path("chatId") chatId: String,
+        @Query("cursor") cursor: String? = null,
+        @Query("pivot") pivot: Long? = null,
+        @Query("afterSequenceId") afterSequenceId: Long? = null,
+        @Query("limit") limit: Int? = 50
+    ): List<MessageDto>
+
+    @POST("messages/chat/{chatId}")
+    suspend fun sendMessage(@Path("chatId") chatId: String, @Body request: SendMessageRequest): MessageDto
+
+    @Multipart
+    @POST("messages/upload")
+    suspend fun uploadFile(@Part file: okhttp3.MultipartBody.Part): FileUploadResponse
+
+    // Klipy GIF API
+    @GET("klipy/trending")
+    suspend fun getTrendingGifs(@Query("page") page: Int): KlipyResponse
+
+    @GET("klipy/search")
+    suspend fun searchGifs(@Query("q") query: String, @Query("page") page: Int): KlipyResponse
+
+    @GET("klipy/categories")
+    suspend fun getGifCategories(): GifCategoriesResponse
+
+    @POST("klipy/shared/{id}")
+    suspend fun markGifShared(@Path("id") id: String, @Body query: String)
+
+    @POST("messages/{messageId}/reactions")
+    suspend fun addReaction(@Path("messageId") messageId: String, @Query("emoji") emoji: String)
+
+    @POST("chats/personal")
+    suspend fun createPersonalChat(@Body request: CreatePersonalChatRequest): ChatDto
+
+    @POST("chats/{chatId}/typing")
+    suspend fun sendTypingStatus(@Path("chatId") chatId: String)
+
+    @POST("chats/{chatId}/read")
+    suspend fun markMessagesAsRead(@Path("chatId") chatId: String, @Body lastMessageId: String)
+
+    @DELETE("messages/{messageId}")
+    suspend fun deleteMessage(@Path("messageId") messageId: String, @Query("forEveryone") forEveryone: Boolean): retrofit2.Response<Unit>
+
+    @PUT("messages/{messageId}")
+    suspend fun editMessage(@Path("messageId") messageId: String, @Body request: SendMessageRequest): MessageDto
+}
+
+data class CreatePersonalChatRequest(
+    val userId: String
+)
+
+data class KlipyResponse(
+    val data: KlipyDataWrapper
+)
+
+data class KlipyDataWrapper(
+    val data: List<KlipyGifDto>
+)
+
+data class KlipyGifDto(
+    val id: String,
+    val images: GifImagesDto? = null,
+    val files: Map<String, Map<String, GifImageSourceDto>>? = null,
+    val file: Map<String, Map<String, GifImageSourceDto>>? = null,
+    val media_formats: Map<String, GifImageSourceDto>? = null,
+    val title: String? = null
+)
+
+data class GifImagesDto(
+    val fixed_height: GifImageSourceDto? = null,
+    val original: GifImageSourceDto? = null,
+    val fixed_height_small: GifImageSourceDto? = null
+)
+
+data class GifImageSourceDto(
+    val url: String
+)
+
+data class GifCategoryDto(
+    val category: String,
+    val preview_url: String,
+    val query: String
+)
+
+data class FileUploadResponse(
+    val url: String,
+    val filename: String,
+    val size: Long
+)
+
+data class GifCategoriesResponse(
+    val data: GifCategoriesData
+)
+
+data class GifCategoriesData(
+    val categories: List<GifCategoryDto>
+)

client-mobile/chats/data/remote/dto/ChatDtos.kt

@@ -0,0 +1,57 @@
+package chats.data.remote.dto
+
+import com.google.gson.annotations.SerializedName
+
+data class UserBasicDto(
+    @SerializedName("id") val id: String,
+    @SerializedName("username") val username: String? = null,
+    @SerializedName("displayName") val displayName: String? = null,
+    @SerializedName("avatarUrl") val avatarUrl: String? = null
+)
+
+data class MessageDto(
+    @SerializedName("id", alternate = ["Id"]) val id: String,
+    @SerializedName("chatId", alternate = ["ChatId"]) val chatId: String? = null,
+    @SerializedName("senderId", alternate = ["SenderId"]) val senderId: String? = null,
+    @SerializedName("content", alternate = ["Content"]) val content: String? = null,
+    @SerializedName("type", alternate = ["Type"]) val type: String? = null,
+    @SerializedName("sequenceId", alternate = ["SequenceId"]) val sequenceId: Int? = null,
+    @SerializedName("createdAt", alternate = ["CreatedAt"]) val createdAt: String? = null,
+    @SerializedName("sender", alternate = ["Sender"]) val sender: UserBasicDto? = null,
+    @SerializedName("media", alternate = ["Media"]) val media: List<MediaItemDto> = emptyList(),
+    @SerializedName("reactions", alternate = ["Reactions"]) val reactions: List<ReactionDto>? = emptyList(),
+    @SerializedName("replyTo", alternate = ["ReplyTo"]) val replyTo: MessageDto? = null,
+    @SerializedName("isPinned", alternate = ["IsPinned"]) val isPinned: Boolean? = false,
+    @SerializedName("forwardedFromId", alternate = ["ForwardedFromId"]) val forwardedFromId: String? = null,
+    @SerializedName("forwardedFrom", alternate = ["ForwardedFrom"]) val forwardedFrom: UserBasicDto? = null
+)
+
+data class ReactionDto(
+    @SerializedName("emoji") val emoji: String,
+    @SerializedName("count") val count: Int,
+    @SerializedName("isSetByMe") val isSetByMe: Boolean
+)
+
+data class MediaItemDto(
+    @SerializedName("id") val id: String,
+    @SerializedName("type") val type: String,
+    @SerializedName("url") val url: String,
+    @SerializedName("filename") val filename: String? = null,
+    @SerializedName("size") val size: Long? = null,
+    @SerializedName("duration") val duration: Double? = null
+)
+
+data class ChatDto(
+    @SerializedName("id") val id: String,
+    @SerializedName("type") val type: String,
+    @SerializedName("name") val name: String? = null,
+    @SerializedName("avatar") val avatar: String? = null,
+    @SerializedName("unreadCount", alternate = ["UnreadCount", "unread_count"]) val unreadCount: Int = 0,
+    @SerializedName("messages") val messages: List<MessageDto> = emptyList(),
+    @SerializedName("members") val members: List<ChatMemberDto> = emptyList()
+)
+
+data class ChatMemberDto(
+    @SerializedName("userId") val userId: String,
+    @SerializedName("user") val user: UserBasicDto? = null
+)

client-mobile/chats/data/remote/signalr/ChatEvent.kt

@@ -0,0 +1,33 @@
+package chats.data.remote.signalr
+
+import chats.data.remote.dto.ChatDto
+import chats.data.remote.dto.MessageDto
+
+sealed class ChatEvent {
+    data class NewMessage(val message: MessageDto) : ChatEvent()
+    data class MessageEdited(val messageId: String, val chatId: String, val content: String) : ChatEvent()
+    data class MessageDeleted(val messageId: String, val chatId: String) : ChatEvent()
+    data class MessagesRead(val chatId: String, val userId: String, val lastReadSequenceId: Int) : ChatEvent()
+    data class UserTyping(val chatId: String, val userId: String) : ChatEvent()
+    data class UserStoppedTyping(val chatId: String, val userId: String) : ChatEvent()
+    data class UserOnline(val userId: String) : ChatEvent()
+    data class UserOffline(val userId: String, val lastSeen: String?) : ChatEvent()
+    data class NewChat(val chat: ChatDto) : ChatEvent()
+    data class ReactionUpdated(val messageId: String, val chatId: String, val userId: String, val emoji: String, val isRemoved: Boolean = false) : ChatEvent()
+    data class MessagePinned(val chatId: String, val message: MessageDto) : ChatEvent()
+    data class MessageUnpinned(val chatId: String, val messageId: String) : ChatEvent()
+
+    // Call Events (WebRTC Signaling)
+    data class CallIncoming(val chatId: String, val from: String, val offer: String, val callType: String) : ChatEvent()
+    data class CallAnswered(val chatId: String, val answer: String) : ChatEvent()
+    data class IceCandidateReceived(val chatId: String, val candidate: String) : ChatEvent()
+    data class CallEnded(val chatId: String) : ChatEvent()
+
+    // Group Call Events
+    data class GroupCallIncoming(val chatId: String, val from: String, val callerInfo: Any) : ChatEvent()
+    data class GroupCallParticipants(val chatId: String, val participants: List<String>) : ChatEvent()
+    data class GroupCallUserJoined(val chatId: String, val userId: String) : ChatEvent()
+    data class GroupCallUserLeft(val chatId: String, val userId: String) : ChatEvent()
+    data class GroupCallOffer(val chatId: String, val from: String, val offer: String) : ChatEvent()
+    data class GroupCallAnswer(val chatId: String, val from: String, val answer: String) : ChatEvent()
+}

client-mobile/chats/data/remote/signalr/ChatHubClient.kt

@@ -0,0 +1,338 @@
+package chats.data.remote.signalr
+
+import android.util.Log
+import io.reactivex.rxjava3.core.Single
+import com.microsoft.signalr.HubConnection
+import com.microsoft.signalr.HubConnectionBuilder
+import com.microsoft.signalr.HubConnectionState
+import chats.data.remote.dto.ChatDto
+import chats.data.remote.dto.MessageDto
+import kotlinx.coroutines.flow.*
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+import javax.inject.Singleton
+
+import kotlinx.coroutines.delay
+
+data class ReadMessagesRequest(
+    val chatId: String,
+    val lastReadMessageId: String,
+    val lastReadSequenceId: Int
+)
+
+data class MessagesReadEvent(
+    @com.google.gson.annotations.SerializedName("chatId", alternate = ["ChatId"]) val chatId: String? = null,
+    @com.google.gson.annotations.SerializedName("userId", alternate = ["UserId"]) val userId: String? = null,
+    @com.google.gson.annotations.SerializedName("lastReadSequenceId", alternate = ["LastReadSequenceId"]) val lastReadSequenceId: Int? = null
+) {
+    val effectiveChatId: String get() = chatId ?: ""
+    val effectiveUserId: String get() = userId ?: ""
+    val effectiveLastReadSequenceId: Int get() = lastReadSequenceId ?: 0
+}
+
+data class ReactionEvent(
+    @com.google.gson.annotations.SerializedName("messageId", alternate = ["MessageId"]) val messageId: String? = null,
+    @com.google.gson.annotations.SerializedName("chatId", alternate = ["ChatId"]) val chatId: String? = null,
+    @com.google.gson.annotations.SerializedName("userId", alternate = ["UserId"]) val userId: String? = null,
+    @com.google.gson.annotations.SerializedName("username", alternate = ["Username", "UserName"]) val username: String? = null,
+    @com.google.gson.annotations.SerializedName("emoji", alternate = ["Emoji"]) val emoji: String? = null
+)
+
+enum class ConnectionStatus { CONNECTED, CONNECTING, DISCONNECTED }
+
+@Singleton
+class ChatHubClient @Inject constructor() {
+    private var hubConnection: HubConnection? = null
+    // extraBufferCapacity=1024 позволяет буферизовать события пока нет подписчиков
+    private val _events = MutableSharedFlow<ChatEvent>(replay = 0, extraBufferCapacity = 1024)
+    val events: SharedFlow<ChatEvent> = _events.asSharedFlow()
+    
+    private val _status = MutableStateFlow(ConnectionStatus.DISCONNECTED)
+    val status: StateFlow<ConnectionStatus> = _status.asStateFlow()
+
+    private val scope = CoroutineScope(Dispatchers.IO)
+    private var lastBaseUrl: String? = null
+    private var lastToken: String? = null
+
+    fun connect(baseUrl: String, accessToken: String) {
+        // Проверяем текущее состояние
+        val currentState = hubConnection?.connectionState
+        if (currentState == HubConnectionState.CONNECTED) {
+            Log.d("ChatHubClient", "Already connected, skipping")
+            return
+        }
+        
+        // Если соединение в процессе - останавливаем его
+        if (currentState == HubConnectionState.CONNECTING) {
+            Log.d("ChatHubClient", "Connection in progress ($currentState), stopping first...")
+            hubConnection?.stop()
+        }
+        
+        // Сохраняем параметры для переподключения
+        lastBaseUrl = baseUrl
+        lastToken = accessToken
+        _status.value = ConnectionStatus.CONNECTING
+
+        Log.d("ChatHubClient", "Connecting to ${baseUrl}/hubs/chat with token: ${accessToken.take(10)}...")
+        
+        // Создаем новое соединение
+        val newHubConnection = HubConnectionBuilder.create("${baseUrl}/hubs/chat")
+            .withAccessTokenProvider(Single.just(accessToken))
+            .build()
+
+        hubConnection = newHubConnection
+        
+        setupHandlers()
+
+        hubConnection?.onClosed { exception ->
+            Log.e("ChatHubClient", "Connection closed. Reconnecting...", exception)
+            _status.value = ConnectionStatus.DISCONNECTED
+            scope.launch {
+                // Проверяем, есть ли еще актуальные параметры для переподключения
+                val reconnectBaseUrl = lastBaseUrl
+                val reconnectToken = lastToken
+                
+                if (reconnectBaseUrl != null && reconnectToken != null) {
+                    Log.d("ChatHubClient", "Attempting reconnection with saved parameters...")
+                    delay(5000)
+                    connect(reconnectBaseUrl, reconnectToken)
+                } else {
+                    Log.w("ChatHubClient", "Cannot reconnect: missing baseUrl or token")
+                }
+            }
+        }
+
+        scope.launch {
+            try {
+                Log.d("ChatHubClient", "Starting SignalR connection...")
+                hubConnection?.start()?.blockingAwait()
+                _status.value = ConnectionStatus.CONNECTED
+                Log.d("ChatHubClient", "SignalR Connected successfully!")
+            } catch (e: Exception) {
+                Log.e("ChatHubClient", "SignalR Connection Error", e)
+                _status.value = ConnectionStatus.DISCONNECTED
+            }
+        }
+    }
+
+    private fun setupHandlers() {
+        hubConnection?.let { conn ->
+            Log.d("ChatHubClient", "Setting up SignalR handlers")
+            
+            conn.on("new_message", { message: MessageDto ->
+                Log.d("ChatHubClient", ">>> new_message event received: ${message.id} in chat ${message.chatId}")
+                _events.tryEmit(ChatEvent.NewMessage(message))
+            }, MessageDto::class.java)
+
+            conn.on("message_edited", { messageId: String, chatId: String, content: String ->
+                Log.d("ChatHubClient", ">>> message_edited event: $messageId")
+                _events.tryEmit(ChatEvent.MessageEdited(messageId, chatId, content))
+            }, String::class.java, String::class.java, String::class.java)
+
+            conn.on("message_deleted", { messageId: String, chatId: String ->
+                Log.d("ChatHubClient", ">>> message_deleted event: $messageId")
+                _events.tryEmit(ChatEvent.MessageDeleted(messageId, chatId))
+            }, String::class.java, String::class.java)
+
+            conn.on("messages_read", { data: MessagesReadEvent ->
+                Log.d("ChatHubClient", ">>> messages_read event: ${data.effectiveChatId}")
+                _events.tryEmit(ChatEvent.MessagesRead(
+                    data.effectiveChatId, 
+                    data.effectiveUserId, 
+                    data.effectiveLastReadSequenceId
+                ))
+            }, MessagesReadEvent::class.java)
+
+            conn.on("user_typing", { data: ReactionEvent ->
+                _events.tryEmit(ChatEvent.UserTyping(data.chatId ?: "", data.userId ?: ""))
+            }, ReactionEvent::class.java)
+
+            conn.on("user_stopped_typing", { data: ReactionEvent ->
+                _events.tryEmit(ChatEvent.UserStoppedTyping(data.chatId ?: "", data.userId ?: ""))
+            }, ReactionEvent::class.java)
+
+            conn.on("user_online", { userId: String ->
+                _events.tryEmit(ChatEvent.UserOnline(userId))
+            }, String::class.java)
+
+            conn.on("new_chat", { chat: ChatDto ->
+                Log.d("ChatHubClient", ">>> new_chat event: ${chat.id}")
+                _events.tryEmit(ChatEvent.NewChat(chat))
+            }, ChatDto::class.java)
+
+            conn.on("reaction_added", { data: ReactionEvent ->
+                Log.d("ChatHubClient", ">>> reaction_added event: ${data.emoji} on ${data.messageId}")
+                _events.tryEmit(ChatEvent.ReactionUpdated(
+                    data.messageId ?: "", 
+                    data.chatId ?: "", 
+                    data.userId ?: "", 
+                    data.emoji ?: "",
+                    isRemoved = false
+                ))
+            }, ReactionEvent::class.java)
+
+            conn.on("reaction_removed", { data: ReactionEvent ->
+                Log.d("ChatHubClient", ">>> reaction_removed event: ${data.emoji} on ${data.messageId}")
+                _events.tryEmit(ChatEvent.ReactionUpdated(
+                    data.messageId ?: "", 
+                    data.chatId ?: "", 
+                    data.userId ?: "", 
+                    data.emoji ?: "",
+                    isRemoved = true
+                ))
+            }, ReactionEvent::class.java)
+
+            // WebRTC Signaling Handlers
+            conn.on("call_incoming", { chatId: String, from: String, offer: String, callType: String ->
+                _events.tryEmit(ChatEvent.CallIncoming(chatId, from, offer, callType))
+            }, String::class.java, String::class.java, String::class.java, String::class.java)
+
+            conn.on("call_answered", { chatId: String, answer: String ->
+                _events.tryEmit(ChatEvent.CallAnswered(chatId, answer))
+            }, String::class.java, String::class.java)
+
+            conn.on("ice_candidate", { chatId: String, candidate: String ->
+                _events.tryEmit(ChatEvent.IceCandidateReceived(chatId, candidate))
+            }, String::class.java, String::class.java)
+
+            conn.on("call_ended", { chatId: String ->
+                _events.tryEmit(ChatEvent.CallEnded(chatId))
+            }, String::class.java)
+            conn.on("message_pinned", { data: Map<String, Any> ->
+                // The web version expects a message object, but here we might get a partial DTO or just IDs.
+                // Let's assume we get { chatId, message: MessageDto } based on web
+                // We'll trust the DTO mapping if possible, but SignalR java client is picky with nested objects in Maps.
+                // For simplicity, we might needs a dedicated DTO if it fails.
+            }, Map::class.java)
+
+            conn.on("message_pinned", { chatId: String, message: MessageDto ->
+                _events.tryEmit(ChatEvent.MessagePinned(chatId, message))
+            }, String::class.java, MessageDto::class.java)
+
+            conn.on("message_unpinned", { chatId: String, messageId: String ->
+                _events.tryEmit(ChatEvent.MessageUnpinned(chatId, messageId))
+            }, String::class.java, String::class.java)
+        }
+    }
+
+    fun disconnect() {
+        hubConnection?.stop()
+        _status.value = ConnectionStatus.DISCONNECTED
+    }
+
+    /**
+     * Принудительное переподключение - останавливает текущее соединение и создает новое
+     */
+    fun reconnect() {
+        Log.d("ChatHubClient", "Forced reconnect requested")
+        val baseUrl = lastBaseUrl
+        val token = lastToken
+        
+        if (baseUrl != null && token != null) {
+            disconnect()
+            // Небольшая задержка перед переподключением
+            scope.launch {
+                delay(1000)
+                connect(baseUrl, token)
+            }
+        } else {
+            Log.w("ChatHubClient", "Cannot reconnect: missing saved credentials")
+        }
+    }
+
+    fun addReaction(messageId: String, chatId: String, emoji: String) {
+        if (hubConnection?.connectionState == HubConnectionState.CONNECTED) {
+            hubConnection?.invoke("add_reaction", mapOf(
+                "messageId" to messageId,
+                "chatId" to chatId,
+                "emoji" to emoji
+            ))?.doOnError { Log.e("ChatHubClient", "add_reaction error", it) }
+              ?.subscribe()
+            Log.d("ChatHubClient", "Invoked add_reaction: $emoji on $messageId")
+        } else {
+            Log.w("ChatHubClient", "Cannot add_reaction: Not connected")
+        }
+    }
+
+    fun removeReaction(messageId: String, chatId: String, emoji: String) {
+        if (hubConnection?.connectionState == HubConnectionState.CONNECTED) {
+            hubConnection?.invoke("remove_reaction", mapOf(
+                "messageId" to messageId,
+                "chatId" to chatId,
+                "emoji" to emoji
+            ))?.doOnError { Log.e("ChatHubClient", "remove_reaction error", it) }
+              ?.subscribe()
+            Log.d("ChatHubClient", "Invoked remove_reaction: $emoji on $messageId")
+        }
+    }
+
+    fun pinMessage(messageId: String, chatId: String) {
+        if (hubConnection?.connectionState == HubConnectionState.CONNECTED) {
+            hubConnection?.invoke("pin_message", mapOf(
+                "messageId" to messageId,
+                "chatId" to chatId
+            ))?.doOnError { Log.e("ChatHubClient", "pin_message error", it) }
+              ?.subscribe()
+        }
+    }
+
+    fun unpinMessage(messageId: String, chatId: String) {
+        if (hubConnection?.connectionState == HubConnectionState.CONNECTED) {
+            hubConnection?.invoke("unpin_message", mapOf(
+                "messageId" to messageId,
+                "chatId" to chatId
+            ))?.doOnError { Log.e("ChatHubClient", "unpin_message error", it) }
+              ?.subscribe()
+        }
+    }
+
+    fun readMessages(request: ReadMessagesRequest) {
+        if (hubConnection?.connectionState == HubConnectionState.CONNECTED) {
+            hubConnection?.invoke("read_messages", request)
+                ?.doOnError { Log.e("ChatHubClient", "read_messages error", it) }
+                ?.subscribe()
+            Log.d("ChatHubClient", "Sent read_messages for chat: ${request.chatId}")
+        }
+    }
+
+    fun joinChat(chatId: String) {
+        scope.launch {
+            // Wait for connection to be established if it's currently connecting
+            var attempts = 0
+            while (hubConnection?.connectionState != HubConnectionState.CONNECTED && attempts < 10) {
+                delay(500)
+                attempts++
+            }
+            
+            if (hubConnection?.connectionState == HubConnectionState.CONNECTED) {
+                Log.d("ChatHubClient", "Joining chat room: $chatId")
+                hubConnection?.invoke("join_chat", chatId)
+                    ?.doOnError { Log.e("ChatHubClient", "join_chat error", it) }
+                    ?.subscribe()
+                Log.d("ChatHubClient", "Joined chat room: $chatId")
+            } else {
+                Log.e("ChatHubClient", "Failed to join chat room $chatId: Not connected (state=${hubConnection?.connectionState})")
+            }
+        }
+    }
+
+    fun sendTypingIndicator(chatId: String) {
+        if (hubConnection?.connectionState == HubConnectionState.CONNECTED) {
+            hubConnection?.invoke("typing_start", chatId)
+                ?.doOnError { Log.e("ChatHubClient", "typing_start error", it) }
+                ?.subscribe()
+            Log.d("ChatHubClient", "Sent typing indicator for chat: $chatId")
+        }
+    }
+
+    fun sendUserStoppedTyping(chatId: String) {
+        if (hubConnection?.connectionState == HubConnectionState.CONNECTED) {
+            hubConnection?.invoke("typing_stop", chatId)
+                ?.doOnError { Log.e("ChatHubClient", "typing_stop error", it) }
+                ?.subscribe()
+            Log.d("ChatHubClient", "Sent user stopped typing for chat: $chatId")
+        }
+    }
+}

client-mobile/chats/data/remote/signalr/SignalRNotificationObserver.kt

@@ -0,0 +1,552 @@
+package chats.data.remote.signalr
+
+import android.content.Context
+import core.network.NetworkManager
+import core.network.ServerConfig
+import core.notifications.data.ActiveChatTracker
+import core.notifications.data.NotificationHelper
+import core.security.TokenManager
+import chats.data.sync.MessageSyncWorker
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.SupervisorJob
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.flow.filterIsInstance
+import kotlinx.coroutines.flow.launchIn
+import kotlinx.coroutines.flow.onEach
+import kotlinx.coroutines.flow.filter
+import kotlinx.coroutines.flow.distinctUntilChanged
+import kotlinx.coroutines.flow.collect
+import javax.inject.Inject
+import javax.inject.Singleton
+import chats.data.remote.signalr.ConnectionStatus
+import okhttp3.OkHttpClient
+import okhttp3.Request
+import java.util.concurrent.TimeUnit
+
+@Singleton
+class SignalRNotificationObserver @Inject constructor(
+    private val signalrClient: ChatHubClient,
+    private val activeChatTracker: ActiveChatTracker,
+    private val tokenManager: TokenManager,
+    private val chatRepository: chats.domain.repository.ChatRepository,
+    private val serverConfig: ServerConfig,
+    private val networkManager: NetworkManager,
+    private val messageDao: core.database.data.MessageDao,
+    private val api: chats.data.remote.api.ChatApi,
+    @ApplicationContext private val context: Context
+) {
+    private val scope = CoroutineScope(SupervisorJob() + Dispatchers.Main)
+    private var isStarted = false
+    private val processedMessageIds = mutableSetOf<String>()
+
+    // OkHttpClient для ping запроса
+    private val pingClient = OkHttpClient.Builder()
+        .connectTimeout(5, TimeUnit.SECONDS)
+        .readTimeout(5, TimeUnit.SECONDS)
+        .build()
+
+    fun start() {
+        if (isStarted) return
+        isStarted = true
+        
+        // Запускаем мониторинг сети
+        networkManager.startMonitoring()
+        
+        // Принудительно обновляем состояние сети при старте
+        networkManager.refreshNetworkState()
+        
+        // Подключаемся к SignalR при старте приложения
+        connectSignalR()
+        
+        // Initial count load
+        refresh()
+        
+        // Запускаем периодическую проверку подключения SignalR
+        startConnectionHealthCheck()
+        
+        // Слушаем восстановление сети и переподключаем SignalR
+        networkManager.isOnline
+            .filter { it } // Только переход в онлайн
+            .distinctUntilChanged()
+            .onEach {
+                android.util.Log.d("SignalRNtfObserver", "Network restored! Reconnecting SignalR and syncing...")
+                // Небольшая задержка чтобы сеть стабилизировалась
+                kotlinx.coroutines.delay(1500)
+                reconnectOnNetworkRestored()
+            }
+            .launchIn(scope)
+        
+        // Также отслеживаем состояние SignalR для переподключения
+        signalrClient.status
+            .filter { it == ConnectionStatus.DISCONNECTED }
+            .onEach {
+                android.util.Log.d("SignalRNtfObserver", "SignalR disconnected, checking network...")
+                // Если мы offline и SignalR отключен - не делаем ничего
+                // Подключимся когда сеть восстановится
+            }
+            .launchIn(scope)
+        
+        // При восстановлении соединения SignalR обновляем список чатов и вступаем в них
+        signalrClient.status
+            .filter { it == ConnectionStatus.CONNECTED }
+            .onEach {
+                android.util.Log.d("SignalRNtfObserver", "SignalR connected, refreshing chats and joining rooms")
+                onSignalRConnected()
+            }
+            .launchIn(scope)
+        
+        // Слушаем события SignalR для уведомлений и обновления списка чатов
+        android.util.Log.d("SignalRNtfObserver", "Starting to listen to signalrClient.events")
+        signalrClient.events
+            .onEach { event ->
+                android.util.Log.d("SignalRNtfObserver", ">>> Received event: ${event::class.simpleName}")
+                when (event) {
+                    is ChatEvent.NewMessage -> {
+                        val currentUserId = tokenManager.getUserId()
+                        val message = event.message
+                        
+                        android.util.Log.d("SignalRNtfObserver", "New message: ${message.id} from ${message.senderId}, current: $currentUserId")
+                        
+                        // Don't show if it's our message or already processed
+                        if (message.senderId == currentUserId) {
+                            android.util.Log.d("SignalRNtfObserver", "Skipping - own message")
+                            return@onEach
+                        }
+                        if (processedMessageIds.contains(message.id)) {
+                            android.util.Log.d("SignalRNtfObserver", "Skipping - already processed")
+                            return@onEach
+                        }
+                        
+                        // Mark as processed
+                        processedMessageIds.add(message.id)
+                        if (processedMessageIds.size > 200) {
+                            processedMessageIds.remove(processedMessageIds.first())
+                        }
+                        
+                        // Increment immediately for UI feedback
+                        activeChatTracker.incrementUnreadCount()
+
+                        // Refresh total count from source of truth in background
+                        refresh()
+                        
+                        // Don't show if this chat is currently open
+                        if (activeChatTracker.currentChatId.value == message.chatId) {
+                            android.util.Log.d("SignalRNtfObserver", "Skipping - chat is open: ${message.chatId}")
+                            return@onEach
+                        }
+                        
+                        android.util.Log.d("SignalRNtfObserver", "Showing notification for chat: ${message.chatId}")
+                        NotificationHelper.showNotification(
+                            context = context,
+                            title = message.sender?.displayName ?: "Новое сообщение",
+                            body = message.content ?: "Вам прислали вложение",
+                            type = "chat",
+                            chatId = message.chatId,
+                            notificationId = message.id.hashCode(),
+                            totalCount = activeChatTracker.totalUnreadCount.value
+                        )
+                    }
+                    is ChatEvent.MessagesRead -> {
+                        android.util.Log.d("SignalRNtfObserver", "Messages read event")
+                        // If anyone read messages, sync our total count
+                        refresh()
+                    }
+                    else -> {
+                        android.util.Log.d("SignalRNtfObserver", "Unhandled event: ${event::class.simpleName}")
+                        Unit
+                    }
+                }
+            }
+            .launchIn(scope)
+    }
+
+    private fun startConnectionHealthCheck() {
+        // Каждые 10 секунд проверяем подключение и при необходимости переподключаемся
+        scope.launch {
+            var consecutiveFailures = 0
+            
+            while (true) {
+                kotlinx.coroutines.delay(10000)
+                val currentStatus = signalrClient.status.value
+                val isOnline = networkManager.isOnline.value
+                
+                if (isOnline && currentStatus == ConnectionStatus.DISCONNECTED) {
+                    consecutiveFailures++
+                    android.util.Log.d("SignalRNtfObserver", "Health check: Network online but SignalR disconnected (failures: $consecutiveFailures), reconnecting...")
+                    signalrClient.reconnect()
+                } else if (isOnline && currentStatus == ConnectionStatus.CONNECTED) {
+                    // Сбрасываем счетчик ошибок при успешном подключении
+                    consecutiveFailures = 0
+                    android.util.Log.d("SignalRNtfObserver", "Health check: Connection healthy")
+                }
+            }
+        }
+    }
+
+    private fun onSignalRConnected() {
+        android.util.Log.d("SignalRNtfObserver", "SignalR connected - syncing missed messages...")
+        refresh()
+        // Вступаем во все чаты для получения событий
+        joinAllChats()
+        // Синхронизируем пропущенные сообщения
+        syncMissedMessages()
+    }
+
+    /**
+     * Синхронизирует пропущенные сообщения после восстановления соединения
+     * Запрашивает только НОВЫЕ сообщения с последнего известного sequenceId
+     * Показывает уведомления для непрочитанных сообщений
+     */
+    private fun syncMissedMessages() {
+        scope.launch {
+            try {
+                android.util.Log.d("SignalRNtfObserver", "Starting missed messages sync...")
+                val chats = chatRepository.getChats()
+                android.util.Log.d("SignalRNtfObserver", "Syncing ${chats.size} chats for missed messages")
+                
+                // Запрашиваем только новые сообщения для каждого чата
+                chats.forEach { chat ->
+                    try {
+                        // Получаем последний известный sequenceId из локальной базы
+                        val lastSequenceId = chatRepository.getLastKnownSequenceId(chat.id)
+                        
+                        if (lastSequenceId != null) {
+                            // Запрашиваем сообщения ПОСЛЕ lastSequenceId (только новые)
+                            android.util.Log.d("SignalRNtfObserver", "Chat ${chat.id}: last known seqId=$lastSequenceId, fetching newer...")
+                            val newMessages = chatRepository.getMessages(
+                                chatId = chat.id,
+                                afterSequenceId = lastSequenceId.toLong(),
+                                limit = 100
+                            )
+                            
+                            android.util.Log.d("SignalRNtfObserver", "Chat ${chat.id}: fetched ${newMessages.size} messages from API")
+                            
+                            // Показываем уведомление если есть новые сообщения и чат не открыт
+                            if (newMessages.isNotEmpty() && activeChatTracker.currentChatId.value != chat.id) {
+                                android.util.Log.d("SignalRNtfObserver", "Chat ${chat.id}: ${newMessages.size} new messages, showing notification")
+                                showMissedMessagesNotification(chat, newMessages)
+                            } else {
+                                android.util.Log.d("SignalRNtfObserver", "Chat ${chat.id}: skipping notification (messages=${newMessages.size}, chatOpen=${activeChatTracker.currentChatId.value == chat.id})")
+                            }
+                        } else {
+                            // Нет локальных сообщений - загружаем последние 50
+                            android.util.Log.d("SignalRNtfObserver", "Chat ${chat.id}: no local messages, fetching last 50")
+                            chatRepository.getMessages(chatId = chat.id, limit = 50)
+                        }
+                        
+                        android.util.Log.d("SignalRNtfObserver", "Synced chat ${chat.id}")
+                        // Небольшая пауза между чатами чтобы не перегружать сервер
+                        kotlinx.coroutines.delay(100)
+                    } catch (e: Exception) {
+                        android.util.Log.e("SignalRNtfObserver", "Failed to sync chat ${chat.id}", e)
+                    }
+                }
+                
+                android.util.Log.d("SignalRNtfObserver", "Missed messages sync completed")
+                
+                // Обновляем счетчик непрочитанных после синхронизации
+                refresh()
+            } catch (e: Exception) {
+                android.util.Log.e("SignalRNtfObserver", "Sync failed", e)
+            }
+        }
+    }
+
+    /**
+     * Показывает уведомление о пропущенных сообщениях
+     */
+    private fun showMissedMessagesNotification(chat: chats.domain.model.Chat, newMessages: List<chats.domain.model.Message>) {
+        scope.launch {
+            try {
+                android.util.Log.d("SignalRNtfObserver", "showMissedMessagesNotification called for chat ${chat.id} with ${newMessages.size} messages")
+                
+                // Фильтруем сообщения не от текущего пользователя
+                val currentUserId = tokenManager.getUserId()
+                android.util.Log.d("SignalRNtfObserver", "Current user ID: $currentUserId")
+                
+                val messagesFromOthers = newMessages.filter { it.senderId != currentUserId }
+                android.util.Log.d("SignalRNtfObserver", "Messages from others: ${messagesFromOthers.size}")
+                
+                if (messagesFromOthers.isEmpty()) {
+                    android.util.Log.d("SignalRNtfObserver", "No new messages from others in chat ${chat.id} - all messages are from current user")
+                    return@launch
+                }
+                
+                // Группируем сообщения по отправителям
+                val messagesBySender = messagesFromOthers.groupBy { it.senderId }
+                android.util.Log.d("SignalRNtfObserver", "Messages grouped by ${messagesBySender.size} sender(s)")
+                
+                // Для каждого отправителя показываем уведомление
+                messagesBySender.forEach { (senderId, messages) ->
+                    val senderName = messages.firstOrNull()?.senderName ?: "Контакт"
+                    val messageCount = messages.size
+                    
+                    android.util.Log.d("SignalRNtfObserver", "Processing sender $senderName with $messageCount messages")
+                    
+                    // Формируем текст уведомления
+                    val notificationText = when {
+                        messageCount == 1 -> {
+                            messages.firstOrNull()?.content ?: "Новое сообщение"
+                        }
+                        messageCount <= 3 -> {
+                            messages.take(3).mapNotNull { it.content }.joinToString(", ")
+                        }
+                        else -> {
+                            "$messageCount новых сообщений"
+                        }
+                    }
+                    
+                    android.util.Log.d("SignalRNtfObserver", "Showing notification for chat ${chat.id}: $senderName - $notificationText")
+                    
+                    // Небольшая задержка перед показом уведомления
+                    kotlinx.coroutines.delay(500)
+                    
+                    // Показываем уведомление
+                    NotificationHelper.showNotification(
+                        context = context,
+                        title = senderName,
+                        body = notificationText,
+                        type = "chat",
+                        chatId = chat.id,
+                        notificationId = chat.id.hashCode(),
+                        totalCount = activeChatTracker.totalUnreadCount.value
+                    )
+                }
+            } catch (e: Exception) {
+                android.util.Log.e("SignalRNtfObserver", "Failed to show missed messages notification", e)
+            }
+        }
+    }
+
+    /**
+     * Получает последний известный sequenceId для чата из локальной базы
+     */
+    private suspend fun getLastKnownSequenceId(chatId: String): Int? {
+        return try {
+            chatRepository.getLastKnownSequenceId(chatId)
+        } catch (e: Exception) {
+            android.util.Log.e("SignalRNtfObserver", "Failed to get last sequenceId for $chatId", e)
+            null
+        }
+    }
+
+    private fun reconnectOnNetworkRestored() {
+        android.util.Log.d("SignalRNtfObserver", "Network restored, starting reconnection sequence...")
+        
+        scope.launch {
+            // 1. Сначала делаем HTTP ping запрос чтобы "разбудить" сетевой стек
+            android.util.Log.d("SignalRNtfObserver", "Sending HTTP ping to wake up network...")
+            val pingSuccess = sendHttpPing()
+            android.util.Log.d("SignalRNtfObserver", "HTTP ping result: $pingSuccess")
+            
+            // 2. Небольшая пауза для стабилизации
+            kotlinx.coroutines.delay(1000)
+            
+            // 3. Принудительное переподключение SignalR
+            android.util.Log.d("SignalRNtfObserver", "Forcing SignalR reconnect...")
+            signalrClient.reconnect()
+            
+            // 4. Ждем пока SignalR подключится (максимум 10 секунд)
+            var waitCount = 0
+            while (signalrClient.status.value != ConnectionStatus.CONNECTED && waitCount < 20) {
+                kotlinx.coroutines.delay(500)
+                waitCount++
+            }
+            
+            if (signalrClient.status.value == ConnectionStatus.CONNECTED) {
+                android.util.Log.d("SignalRNtfObserver", "SignalR reconnected, syncing missed messages...")
+                // 5. Синхронизируем пропущенные сообщения
+                syncMissedMessages()
+                
+                // 6. Пробуем отправить отложенные сообщения НЕМЕДЛЕННО (не через WorkManager)
+                sendPendingMessagesImmediately()
+                
+                // 7. Также планируем WorkManager на всякий случай
+                MessageSyncWorker.scheduleSync(context)
+                android.util.Log.d("SignalRNtfObserver", "Outgoing sync worker scheduled")
+            } else {
+                android.util.Log.w("SignalRNtfObserver", "SignalR failed to reconnect within timeout")
+            }
+        }
+    }
+
+    /**
+     * Немедленно отправляет отложенные сообщения без ожидания WorkManager
+     * Вызывается сразу после восстановления соединения
+     */
+    private fun sendPendingMessagesImmediately() {
+        scope.launch {
+            try {
+                android.util.Log.d("SignalRNtfObserver", "Checking for pending messages to send...")
+                
+                // Получаем все сообщения со статусом SYNCING
+                val pendingMessages = messageDao.getPendingSyncMessages()
+                android.util.Log.d("SignalRNtfObserver", "Found ${pendingMessages.size} pending messages")
+                
+                if (pendingMessages.isEmpty()) {
+                    android.util.Log.d("SignalRNtfObserver", "No pending messages to send")
+                    return@launch
+                }
+                
+                var successCount = 0
+                var failureCount = 0
+                
+                for (message in pendingMessages) {
+                    try {
+                        android.util.Log.d("SignalRNtfObserver", "Sending pending message: ${message.id}")
+                        
+                        val attachments = parseAttachments(message.mediaJson)
+                        val request = chats.data.remote.api.SendMessageRequest(
+                            content = message.content,
+                            type = message.mediaType.lowercase(),
+                            attachments = attachments,
+                            replyToId = message.replyToId
+                        )
+                        
+                        val response = api.sendMessage(message.chatId, request)
+                        
+                        // Обновляем сообщение в базе
+                        val syncedMessage = message.copy(
+                            id = response.id,
+                            sequenceId = response.sequenceId ?: message.sequenceId,
+                            createdAt = response.createdAt ?: message.createdAt,
+                            syncStatus = core.database.data.SyncStatus.SYNCED,
+                            isDeletedLocally = false,
+                            isEditedLocally = false,
+                            editedContent = null,
+                            lastUpdated = System.currentTimeMillis()
+                        )
+                        
+                        messageDao.insertMessage(syncedMessage)
+                        android.util.Log.d("SignalRNtfObserver", "Message sent successfully: ${response.id}")
+                        successCount++
+                        
+                    } catch (e: Exception) {
+                        android.util.Log.e("SignalRNtfObserver", "Failed to send message ${message.id}", e)
+                        failureCount++
+                    }
+                }
+                
+                android.util.Log.d("SignalRNtfObserver", "Pending messages sync completed. Success: $successCount, Failed: $failureCount")
+                
+            } catch (e: Exception) {
+                android.util.Log.e("SignalRNtfObserver", "sendPendingMessagesImmediately failed", e)
+            }
+        }
+    }
+
+    private fun parseAttachments(mediaJson: String): List<chats.data.remote.api.AttachmentRequest>? {
+        return try {
+            val gson = com.google.gson.Gson()
+            val mediaList = gson.fromJson(mediaJson, Array::class.java)
+                ?.map { elem -> 
+                    val map = elem as Map<*, *>
+                    chats.data.remote.api.AttachmentRequest(
+                        type = map["type"] as? String ?: "file",
+                        url = map["url"] as? String ?: "",
+                        fileName = map["filename"] as? String ?: "file",
+                        fileSize = (map["size"] as? Number)?.toLong() ?: 0L
+                    )
+                }
+            mediaList?.takeIf { it.isNotEmpty() }
+        } catch (e: Exception) {
+            android.util.Log.e("SignalRNtfObserver", "Failed to parse attachments", e)
+            null
+        }
+    }
+
+    /**
+     * Отправляет HTTP ping запрос для активации сетевого соединения
+     */
+    private suspend fun sendHttpPing(): Boolean {
+        return try {
+            val baseUrl = serverConfig.getBaseUrl()
+            val token = tokenManager.getToken()
+            
+            if (baseUrl.isBlank() || token == null) {
+                android.util.Log.w("SignalRNtfObserver", "Cannot ping: missing baseUrl or token")
+                return false
+            }
+            
+            val url = "${baseUrl.removeSuffix("/api/")}/api/auth/refresh"
+            val request = Request.Builder()
+                .url(url)
+                .post(okhttp3.RequestBody.create(null, "{}"))
+                .addHeader("Authorization", "Bearer $token")
+                .build()
+            
+            val response = pingClient.newCall(request).execute()
+            val success = response.isSuccessful || response.code == 401 // 401 OK для refresh
+            android.util.Log.d("SignalRNtfObserver", "HTTP ping to $url: ${response.code}")
+            response.close()
+            success
+        } catch (e: Exception) {
+            android.util.Log.e("SignalRNtfObserver", "HTTP ping failed", e)
+            false
+        }
+    }
+
+    private fun connectSignalR() {
+        val token = tokenManager.getToken()
+        val baseUrl = serverConfig.getBaseUrl()
+        
+        if (token == null || baseUrl.isBlank()) {
+            android.util.Log.w("SignalRNtfObserver", "Cannot connect SignalR: token=${token != null}, baseUrl=$baseUrl")
+            return
+        }
+        
+        val isOnline = networkManager.isOnline.value
+        if (!isOnline) {
+            android.util.Log.w("SignalRNtfObserver", "Cannot connect SignalR: network is offline")
+            return
+        }
+        
+        // Проверяем текущее состояние SignalR
+        val currentStatus = signalrClient.status.value
+        if (currentStatus == ConnectionStatus.CONNECTED) {
+            android.util.Log.d("SignalRNtfObserver", "SignalR already connected, skipping")
+            return
+        }
+        
+        android.util.Log.d("SignalRNtfObserver", "Connecting SignalR with token: ${token.take(10)}..., baseUrl: $baseUrl")
+        signalrClient.connect(baseUrl.removeSuffix("/api/"), token)
+        
+        // Если подключение не удалось в течение 5 секунд - пробуем снова
+        scope.launch {
+            kotlinx.coroutines.delay(5000)
+            if (signalrClient.status.value == ConnectionStatus.DISCONNECTED) {
+                android.util.Log.w("SignalRNtfObserver", "SignalR connection timeout, retrying with reconnect()...")
+                signalrClient.reconnect()
+            }
+        }
+    }
+
+    private fun joinAllChats() {
+        scope.launch {
+            try {
+                val chats = chatRepository.getChats()
+                android.util.Log.d("SignalRNtfObserver", "Joining ${chats.size} chat rooms")
+                chats.forEach { chat ->
+                    signalrClient.joinChat(chat.id)
+                }
+            } catch (e: Exception) {
+                android.util.Log.e("SignalRNtfObserver", "Failed to join chats", e)
+            }
+        }
+    }
+
+    fun refresh() {
+        scope.launch {
+            try {
+                val chats = chatRepository.getChats()
+                val total = chats.sumOf { it.unreadCount }
+                activeChatTracker.setTotalUnreadCount(total)
+                android.util.Log.d("SignalRNtfObserver", "Refreshed chats: ${chats.size}, total unread: $total")
+            } catch (e: Exception) {
+                android.util.Log.e("SignalRNtfObserver", "Failed to refresh", e)
+            }
+        }
+    }
+}

client-mobile/chats/data/repository/ChatRepositoryImpl.kt

@@ -0,0 +1,332 @@
+package chats.data.repository
+
+import android.content.Context
+import android.util.Log
+import androidx.paging.*
+import chats.data.paging.MessageRemoteMediator
+import chats.data.remote.api.ChatApi
+import chats.data.remote.api.SendMessageRequest
+import chats.data.remote.dto.ChatDto
+import chats.data.remote.dto.MessageDto
+import chats.data.signalr.MessageSignalRHandler
+import chats.data.sync.MessageSyncWorker
+import chats.domain.model.Chat
+import chats.domain.model.Message
+import chats.domain.model.MediaType
+import chats.domain.repository.ChatRepository
+import core.database.data.ChatDatabase
+import core.database.data.ChatDao
+import core.database.data.MessageDao
+import core.database.data.MessageEntity
+import core.database.data.SyncStatus
+import core.network.ServerConfig
+import chats.data.remote.signalr.ChatHubClient
+import core.security.TokenManager
+import com.google.gson.Gson
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+import okhttp3.MediaType.Companion.toMediaTypeOrNull
+import okhttp3.MultipartBody
+import okhttp3.RequestBody.Companion.asRequestBody
+import java.text.SimpleDateFormat
+import java.util.*
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Основная реализация репозитория чатов
+ * 
+ * Архитектура Offline-first:
+ * 1. Все данные читаются из локальной базы Room
+ * 2. При изменении данных - сначала запись в БД, потом синхронизация с сервером
+ * 3. SignalR обновления сразу записываются в БД
+ * 4. WorkManager обрабатывает фоновую синхронизацию
+ * 
+ * Conflict Resolution:
+ * - Серверные данные имеют приоритет над локальными
+ * - Исключение: сообщения в процессе отправки (SYNCING) или редактирования
+ */
+@OptIn(ExperimentalPagingApi::class)
+@Singleton
+class ChatRepositoryImpl @Inject constructor(
+    private val api: ChatApi,
+    private val tokenManager: TokenManager,
+    private val serverConfig: ServerConfig,
+    private val messageDao: MessageDao,
+    private val chatDao: ChatDao,
+    private val database: ChatDatabase,
+    private val hubClient: ChatHubClient,
+    private val signalRHandler: MessageSignalRHandler,
+    private val context: Context
+) : ChatRepository {
+    
+    private val gson = Gson()
+    private val baseUrl = serverConfig.getBaseUrl().removeSuffix("/api/")
+
+    init {
+        signalRHandler.startListening()
+        Log.d(TAG, "ChatRepositoryImpl initialized")
+    }
+
+    override suspend fun getChats(): List<Chat> {
+        val currentUserId = tokenManager.getUserId() ?: ""
+        return try {
+            // Пробуем загрузить из сети
+            val chats = api.getChats().map { it.toDomain(currentUserId, baseUrl) }
+            // Кэшируем в Room
+            val entities = chats.map { it.toEntity() }
+            chatDao.insertChats(entities)
+            // Кэшируем последние сообщения
+            chats.forEach { chat ->
+                chat.lastMessage?.let { msg ->
+                    messageDao.upsertMessage(msg.toEntity(gson))
+                }
+            }
+            android.util.Log.d(TAG, "Cached ${entities.size} chats with messages")
+            chats
+        } catch (e: Exception) {
+            android.util.Log.d(TAG, "Network load failed, using cache")
+            // При ошибке - возвращаем из кэша с загрузкой последних сообщений
+            chatDao.getAllChats().map { entity ->
+                val lastMessage = entity.lastMessageId?.let { messageId ->
+                    messageDao.getMessageById(messageId)?.toDomain(baseUrl, gson)
+                }
+                entity.toDomain(currentUserId, baseUrl, lastMessage)
+            }
+        }
+    }
+
+    override fun getChatsFlow(): Flow<List<Chat>> {
+        val currentUserId = tokenManager.getUserId() ?: ""
+        return chatDao.getAllChatsFlow().map { entities ->
+            entities.map { entity ->
+                // Загружаем последнее сообщение из базы для каждого чата
+                val lastMessage = entity.lastMessageId?.let { messageId ->
+                    messageDao.getMessageById(messageId)?.toDomain(baseUrl, gson)
+                }
+                entity.toDomain(currentUserId, baseUrl, lastMessage)
+            }
+        }
+    }
+
+    override fun getMessagesPaging(chatId: String): Flow<PagingData<Message>> {
+        val pagingConfig = PagingConfig(
+            pageSize = 30,
+            prefetchDistance = 10,
+            initialLoadSize = 50,
+            enablePlaceholders = false
+        )
+        
+        return Pager(
+            config = pagingConfig,
+            pagingSourceFactory = { messageDao.getMessagesPagingSource(chatId) },
+            remoteMediator = MessageRemoteMediator(
+                chatId = chatId,
+                api = api,
+                database = database,
+                dao = messageDao,
+                serverConfig = serverConfig,
+                tokenManager = tokenManager
+            )
+        ).flow.map { pagingData ->
+            pagingData.map { entity -> entity.toDomain(baseUrl, gson) }
+        }
+    }
+
+    override fun getMessagesFlow(chatId: String): Flow<List<Message>> {
+        return messageDao.getMessages(chatId).map { entities ->
+            entities.map { it.toDomain(baseUrl, gson) }
+        }
+    }
+
+    override suspend fun getMessages(
+        chatId: String, cursor: String?, pivot: Long?, afterSequenceId: Long?, limit: Int?
+    ): List<Message> {
+        val currentUserId = tokenManager.getUserId() ?: ""
+        return try {
+            Log.d(TAG, "Fetching messages from API: chatId=$chatId, afterSequenceId=$afterSequenceId, limit=$limit")
+            val messages = api.getMessages(chatId, cursor = cursor, pivot = pivot, afterSequenceId = afterSequenceId, limit = limit)
+            
+            if (messages.isNotEmpty()) {
+                val entities = messages.map { it.toEntity(baseUrl, currentUserId, gson) }
+                messageDao.upsertMessages(entities)
+                Log.d(TAG, "Cached ${entities.size} messages")
+            }
+            
+            messages.map { msg -> msg.toDomain(currentUserId, baseUrl).copy(isRead = true) }
+        } catch (e: Exception) {
+            Log.e(TAG, "Fetch messages failed", e)
+            emptyList()
+        }
+    }
+
+    override suspend fun getLastKnownSequenceId(chatId: String): Int? {
+        return try {
+            messageDao.getMaxSequenceId(chatId)
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to get last sequenceId", e)
+            null
+        }
+    }
+
+    override suspend fun sendMessage(
+        chatId: String, content: String?, type: String,
+        attachments: List<chats.data.remote.api.AttachmentRequest>?,
+        replyToId: String?, forwardedFromId: String?
+    ): Message {
+        val userId = tokenManager.getUserId() ?: ""
+        val currentTime = System.currentTimeMillis()
+        
+        val localId = "local_${currentTime}_${chatId}"
+        val localMessage = MessageEntity(
+            id = localId, chatId = chatId, senderId = userId,
+            senderName = "Вы", senderAvatar = null, content = content,
+            sequenceId = 0,
+            createdAt = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US).format(Date(currentTime)),
+            mediaType = type.uppercase(),
+            mediaJson = "[]",
+            reactionsJson = "{}",
+            isRead = true, replyToId = replyToId,
+            syncStatus = SyncStatus.SYNCING,
+            isDeletedLocally = false, isEditedLocally = false,
+            editedContent = null, lastUpdated = currentTime
+        )
+        
+        messageDao.insertMessage(localMessage)
+        Log.d(TAG, "Saved local message: $localId")
+        
+        // Пробуем отправить НЕМЕДЛЕННО через API
+        try {
+            Log.d(TAG, "Sending message immediately via API: $localId")
+            val request = SendMessageRequest(
+                content = content,
+                type = type,
+                attachments = attachments,
+                replyToId = replyToId
+            )
+            val response = api.sendMessage(chatId, request)
+            Log.d(TAG, "Message sent successfully: ${response.id}")
+            
+            // Обновляем сообщение в базе с серверными данными
+            val syncedMessage = localMessage.copy(
+                id = response.id,
+                sequenceId = response.sequenceId ?: 0,
+                createdAt = response.createdAt ?: localMessage.createdAt,
+                syncStatus = SyncStatus.SYNCED
+            )
+            messageDao.insertMessage(syncedMessage)
+            
+            // Возвращаем доменную модель с серверными данными
+            return response.toDomain(userId, baseUrl)
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to send message immediately, scheduling sync: ${e.message}")
+            // Ошибка - планируем синхронизацию через WorkManager
+            MessageSyncWorker.scheduleSync(context)
+        }
+        
+        // Создаём доменную модель вручную для локального сообщения
+        return Message(
+            id = localId,
+            chatId = chatId,
+            senderId = userId,
+            senderName = "Вы",
+            senderAvatar = null,
+            content = content,
+            sequenceId = 0,
+            createdAt = SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", Locale.US).format(Date(currentTime)),
+            media = emptyList(),
+            mediaType = when (type) {
+                "image" -> MediaType.IMAGE
+                "video" -> MediaType.VIDEO
+                "audio" -> MediaType.AUDIO
+                "gif" -> MediaType.GIF
+                else -> MediaType.TEXT
+            },
+            reactions = emptyMap(),
+            isRead = true,
+            isPinned = false,
+            isForwarded = false,
+            forwardedFromName = null,
+            replyTo = null
+        )
+    }
+
+    override suspend fun addReaction(messageId: String, emoji: String) {
+        hubClient.addReaction(messageId, "", emoji)
+    }
+
+    override suspend fun sendTypingStatus(chatId: String) {
+        api.sendTypingStatus(chatId)
+        hubClient.sendTypingIndicator(chatId)
+    }
+
+    override suspend fun markMessagesAsRead(chatId: String, lastMessageId: String, lastReadSequenceId: Int) {
+        try {
+            hubClient.readMessages(chats.data.remote.signalr.ReadMessagesRequest(chatId, lastMessageId, lastReadSequenceId))
+        } catch (e: Exception) {
+            Log.e(TAG, "Error marking messages as read", e)
+        }
+        messageDao.markMessagesAsRead(chatId, lastReadSequenceId)
+    }
+
+    override suspend fun saveMessage(message: Message) {
+        messageDao.insertMessage(message.toEntity(gson))
+    }
+
+    override suspend fun deleteLocalMessage(messageId: String) {
+        messageDao.markAsDeletedLocally(messageId)
+        MessageSyncWorker.scheduleSync(context)
+    }
+
+    override suspend fun editLocalMessage(messageId: String, newContent: String) {
+        messageDao.markAsEditedLocally(messageId, newContent)
+        MessageSyncWorker.scheduleSync(context)
+    }
+
+    override suspend fun uploadMedia(file: java.io.File): String {
+        val mimeType = when (file.extension.lowercase()) {
+            "jpg", "jpeg" -> "image/jpeg"
+            "png" -> "image/png"
+            "webp" -> "image/webp"
+            "mp4" -> "video/mp4"
+            "mp3", "m4a", "wav" -> "audio/mpeg"
+            else -> "application/octet-stream"
+        }
+        val requestFile = file.asRequestBody(mimeType.toMediaTypeOrNull())
+        val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
+        return api.uploadFile(body).url
+    }
+
+    override suspend fun getTrendingGifs(page: Int): List<chats.data.remote.api.KlipyGifDto> =
+        api.getTrendingGifs(page).data.data
+
+    override suspend fun searchGifs(query: String, page: Int): List<chats.data.remote.api.KlipyGifDto> =
+        api.searchGifs(query, page).data.data
+
+    override suspend fun getGifCategories(): List<chats.data.remote.api.GifCategoryDto> =
+        api.getGifCategories().data.categories
+
+    override suspend fun createPersonalChat(userId: String): Chat {
+        val currentUserId = tokenManager.getUserId() ?: ""
+        val request = chats.data.remote.api.CreatePersonalChatRequest(userId)
+        return api.createPersonalChat(request).toDomain(currentUserId, baseUrl)
+    }
+
+    override suspend fun deleteMessage(messageId: String, forEveryone: Boolean) {
+        api.deleteMessage(messageId, forEveryone)
+        messageDao.deleteMessage(messageId)
+    }
+
+    override suspend fun editMessage(messageId: String, content: String): Message {
+        val request = SendMessageRequest(content = content)
+        val currentUserId = tokenManager.getUserId() ?: ""
+        val response = api.editMessage(messageId, request)
+        messageDao.insertMessage(response.toEntity(baseUrl, currentUserId, gson))
+        return response.toDomain(currentUserId, baseUrl)
+    }
+
+    companion object {
+        private const val TAG = "ChatRepositoryImpl"
+    }
+}
+

client-mobile/chats/data/repository/Mappers.kt

@@ -0,0 +1,210 @@
+package chats.data.repository
+
+import chats.data.remote.dto.*
+import chats.domain.model.*
+import core.database.data.ChatEntity
+import core.database.data.MessageEntity
+import core.database.data.SyncStatus
+
+// Mappers
+fun ChatDto.toDomain(currentUserId: String, baseUrl: String): Chat {
+    val chatName = name ?: if (type == "personal") {
+        members.firstOrNull { it.userId != currentUserId }?.user?.displayName ?: "Unknown Chat"
+    } else "Group Chat"
+
+    val chatAvatar = (avatar ?: if (type == "personal") {
+        members.firstOrNull { it.userId != currentUserId }?.user?.avatarUrl
+    } else null)?.ensureAbsoluteUrl(baseUrl)
+
+    return Chat(
+        id = id,
+        type = type,
+        name = chatName,
+        avatar = chatAvatar,
+        unreadCount = unreadCount,
+        lastMessage = messages.firstOrNull()?.toDomain(currentUserId, baseUrl)
+    )
+}
+
+fun Chat.toEntity(): ChatEntity {
+    return ChatEntity(
+        id = id,
+        name = name,
+        avatar = avatar,
+        type = type,
+        lastMessageId = lastMessage?.id,
+        lastMessageText = lastMessage?.content,
+        lastMessageAt = lastMessage?.createdAt?.let { 
+            try { java.text.SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS'Z'", java.util.Locale.US).parse(it)?.time ?: 0L } 
+            catch (e: Exception) { 0L }
+        } ?: 0L,
+        unreadCount = unreadCount,
+        isPinned = false
+    )
+}
+
+fun ChatEntity.toDomain(
+    currentUserId: String,
+    baseUrl: String,
+    lastMessage: Message? = null
+): Chat {
+    return Chat(
+        id = id,
+        type = type,
+        name = name,
+        avatar = avatar,
+        unreadCount = unreadCount,
+        lastMessage = lastMessage
+    )
+}
+
+fun Message.toEntity(gson: com.google.gson.Gson): core.database.data.MessageEntity {
+    return core.database.data.MessageEntity(
+        id = id,
+        chatId = chatId,
+        senderId = senderId,
+        senderName = senderName,
+        senderAvatar = senderAvatar,
+        content = content,
+        sequenceId = sequenceId,
+        createdAt = createdAt,
+        mediaType = mediaType.name.lowercase(),
+        mediaJson = gson.toJson(media),
+        reactionsJson = gson.toJson(reactions),
+        isRead = isRead,
+        replyToId = replyTo?.id,
+        syncStatus = SyncStatus.SYNCED,
+        isDeletedLocally = false,
+        isEditedLocally = false,
+        editedContent = null,
+        lastUpdated = System.currentTimeMillis()
+    )
+}
+
+fun MessageDto.toDomain(currentUserId: String, baseUrl: String): Message {
+    val domainMediaType = when (type) {
+        "gif" -> MediaType.GIF
+        "image", "photo" -> MediaType.IMAGE
+        "video" -> MediaType.VIDEO
+        "audio", "voice" -> MediaType.AUDIO
+        "file" -> MediaType.FILE
+        else -> when (media.firstOrNull()?.type) {
+            "image", "photo" -> MediaType.IMAGE
+            "video" -> MediaType.VIDEO
+            "audio", "voice" -> MediaType.AUDIO
+            "file" -> MediaType.FILE
+            else -> MediaType.TEXT
+        }
+    }
+
+    return Message(
+        id = id,
+        chatId = chatId ?: "",
+        senderId = senderId ?: "",
+        senderName = sender?.displayName ?: "Unknown",
+        senderAvatar = sender?.avatarUrl?.ensureAbsoluteUrl(baseUrl),
+        content = content,
+        sequenceId = sequenceId ?: 0,
+        createdAt = createdAt ?: "",
+        media = media.map { 
+            chats.domain.model.Media(
+                id = it.id ?: java.util.UUID.randomUUID().toString(),
+                type = it.type ?: "unknown",
+                url = (it.url ?: "").ensureAbsoluteUrl(baseUrl),
+                filename = it.filename,
+                size = it.size,
+                duration = it.duration
+            )
+        },
+        mediaType = domainMediaType,
+        reactions = reactions?.associate { it.emoji to it.count } ?: emptyMap(),
+        isRead = senderId == currentUserId, 
+        isPinned = isPinned ?: false,
+        isForwarded = forwardedFromId != null,
+        forwardedFromName = forwardedFrom?.displayName ?: forwardedFrom?.username,
+        replyTo = replyTo?.toDomain(currentUserId, baseUrl)
+    )
+}
+
+fun MessageDto.toEntity(baseUrl: String, currentUserId: String, gson: com.google.gson.Gson): core.database.data.MessageEntity {
+    return core.database.data.MessageEntity(
+        id = id,
+        chatId = chatId ?: "",
+        senderId = senderId ?: "",
+        senderName = sender?.displayName ?: "Unknown",
+        senderAvatar = sender?.avatarUrl?.ensureAbsoluteUrl(baseUrl),
+        content = content,
+        sequenceId = sequenceId ?: 0,
+        createdAt = createdAt ?: "",
+        mediaType = type ?: "text",
+        mediaJson = gson.toJson(media),
+        reactionsJson = gson.toJson(reactions),
+        isRead = senderId == currentUserId,
+        replyToId = replyTo?.id
+    )
+}
+
+fun core.database.data.MessageEntity.toDomain(baseUrl: String, gson: com.google.gson.Gson): Message {
+    val mediaTypeEnum = when (mediaType) {
+        "gif" -> MediaType.GIF
+        "image", "photo" -> MediaType.IMAGE
+        "video" -> MediaType.VIDEO
+        "audio", "voice" -> MediaType.AUDIO
+        "file" -> MediaType.FILE
+        else -> MediaType.TEXT
+    }
+
+    val mediaTypeToken = object : com.google.gson.reflect.TypeToken<List<chats.data.remote.dto.MediaItemDto>>() {}.type
+    val mediaDtos: List<chats.data.remote.dto.MediaItemDto> = try {
+        gson.fromJson(mediaJson, mediaTypeToken)
+    } catch (e: Exception) {
+        emptyList()
+    } ?: emptyList()
+
+    val reactionsTypeToken = object : com.google.gson.reflect.TypeToken<List<chats.data.remote.dto.ReactionDto>>() {}.type
+    val reactionDtos: List<chats.data.remote.dto.ReactionDto> = try {
+        gson.fromJson(reactionsJson, reactionsTypeToken)
+    } catch (e: Exception) {
+        try {
+            val mapType = object : com.google.gson.reflect.TypeToken<Map<String, Int>>() {}.type
+            val map: Map<String, Int> = gson.fromJson(reactionsJson, mapType) ?: emptyMap()
+            map.map { chats.data.remote.dto.ReactionDto(it.key, it.value, false) }
+        } catch (innerE: Exception) {
+            emptyList()
+        }
+    } ?: emptyList()
+
+    return Message(
+        id = id,
+        chatId = chatId,
+        senderId = senderId,
+        senderName = senderName,
+        senderAvatar = senderAvatar,
+        content = content,
+        sequenceId = sequenceId,
+        createdAt = createdAt,
+        media = mediaDtos.map { 
+            chats.domain.model.Media(
+                id = it.id ?: java.util.UUID.randomUUID().toString(),
+                type = it.type ?: "unknown",
+                url = (it.url ?: "").ensureAbsoluteUrl(baseUrl),
+                filename = it.filename,
+                size = it.size,
+                duration = it.duration
+            )
+        },
+        mediaType = mediaTypeEnum,
+        reactions = reactionDtos.associate { it.emoji to it.count },
+        isRead = isRead
+    )
+}
+
+fun String.ensureAbsoluteUrl(baseUrl: String): String {
+    return if (this.startsWith("http")) {
+        this
+    } else {
+        val base = baseUrl.removeSuffix("/")
+        val path = if (this.startsWith("/")) this else "/$this"
+        "$base$path"
+    }
+}

client-mobile/chats/data/signalr/MessageSignalRHandler.kt

@@ -0,0 +1,194 @@
+package chats.data.signalr
+
+import android.util.Log
+import chats.data.remote.dto.MessageDto
+import chats.data.remote.signalr.ChatEvent
+import chats.data.remote.signalr.ChatHubClient
+import chats.data.remote.signalr.MessagesReadEvent
+import chats.data.remote.signalr.ReactionEvent
+import chats.data.repository.toEntity
+import com.google.gson.Gson
+import core.database.data.MessageDao
+import core.database.data.MessageEntity
+import core.database.data.SyncStatus
+import core.network.ServerConfig
+import core.security.TokenManager
+import kotlinx.coroutines.*
+import kotlinx.coroutines.flow.collectLatest
+import javax.inject.Inject
+import javax.inject.Singleton
+
+/**
+ * Обработчик SignalR событий для обновления локального кэша
+ * 
+ * Обрабатывает события:
+ * - new_message: новое сообщение в чате
+ * - message_edited: сообщение отредактировано
+ * - message_deleted: сообщение удалено
+ * - messages_read: сообщения прочитаны
+ * - reaction_added/removed: реакция добавлена/удалена
+ * 
+ * Все изменения сразу записываются в Room, UI обновляется через Flow
+ */
+@Singleton
+class MessageSignalRHandler @Inject constructor(
+    private val hubClient: ChatHubClient,
+    private val dao: MessageDao,
+    private val serverConfig: ServerConfig,
+    private val tokenManager: TokenManager
+) {
+    private val gson = Gson()
+    private val scope = CoroutineScope(Dispatchers.IO + SupervisorJob())
+    private val baseUrl = serverConfig.getBaseUrl().removeSuffix("/api/")
+    
+    private var isListening = false
+
+    /**
+     * Начинает прослушивание SignalR событий
+     * Вызывается один раз при инициализации приложения
+     */
+    fun startListening() {
+        if (isListening) {
+            Log.w(TAG, "Already listening to SignalR events")
+            return
+        }
+        
+        isListening = true
+        Log.d(TAG, "Started listening to SignalR events")
+        
+        scope.launch {
+            hubClient.events.collectLatest { event ->
+                handleEvent(event)
+            }
+        }
+    }
+
+    /**
+     * Останавливает прослушивание событий
+     */
+    fun stopListening() {
+        isListening = false
+        scope.cancel()
+        Log.d(TAG, "Stopped listening to SignalR events")
+    }
+
+    private suspend fun handleEvent(event: ChatEvent) {
+        try {
+            when (event) {
+                is ChatEvent.NewMessage -> handleNewMessage(event.message)
+                is ChatEvent.MessageEdited -> handleMessageEdited(event.messageId, event.chatId, event.content)
+                is ChatEvent.MessageDeleted -> handleMessageDeleted(event.messageId, event.chatId)
+                is ChatEvent.MessagesRead -> handleMessagesRead(event.chatId, event.lastReadSequenceId)
+                is ChatEvent.ReactionUpdated -> handleReactionUpdated(
+                    event.messageId, 
+                    event.emoji, 
+                    event.isRemoved
+                )
+                else -> Log.d(TAG, "Unhandled event: ${event::class.simpleName}")
+            }
+        } catch (e: Exception) {
+            Log.e(TAG, "Error handling SignalR event: ${event::class.simpleName}", e)
+        }
+    }
+
+    private suspend fun handleNewMessage(dto: MessageDto) {
+        Log.d(TAG, "New message received: ${dto.id} in chat ${dto.chatId}")
+        
+        val currentUserId = tokenManager.getUserId() ?: ""
+        val entity = dto.toEntity(baseUrl, currentUserId, gson).copy(
+            syncStatus = SyncStatus.SYNCED
+        )
+        
+        val existing = dao.getMessageById(dto.id)
+        if (existing != null && existing.syncStatus == SyncStatus.SYNCING) {
+            val syncedEntity = entity.copy(
+                syncStatus = SyncStatus.SYNCED,
+                isDeletedLocally = false,
+                isEditedLocally = false,
+                editedContent = null
+            )
+            dao.insertMessage(syncedEntity)
+            Log.d(TAG, "Merged local message with server response: ${dto.id}")
+        } else {
+            dao.insertMessage(entity)
+            Log.d(TAG, "Saved new message: ${dto.id}")
+        }
+    }
+
+    private suspend fun handleMessageEdited(messageId: String, chatId: String, content: String) {
+        Log.d(TAG, "Message edited: $messageId")
+        
+        val existing = dao.getMessageById(messageId)
+        if (existing != null) {
+            if (existing.isEditedLocally) {
+                Log.d(TAG, "Message is being edited locally, skipping server update: $messageId")
+                return
+            }
+            
+            val updated = existing.copy(
+                content = content,
+                lastUpdated = System.currentTimeMillis()
+            )
+            dao.insertMessage(updated)
+            Log.d(TAG, "Updated edited message: $messageId")
+        } else {
+            Log.w(TAG, "Edited message not found in cache: $messageId")
+        }
+    }
+
+    private suspend fun handleMessageDeleted(messageId: String, chatId: String) {
+        Log.d(TAG, "Message deleted: $messageId")
+        
+        val existing = dao.getMessageById(messageId)
+        if (existing?.isDeletedLocally == true) {
+            dao.deleteMessage(messageId)
+            Log.d(TAG, "Completed local deletion: $messageId")
+        } else {
+            dao.deleteMessage(messageId)
+            Log.d(TAG, "Removed deleted message from cache: $messageId")
+        }
+    }
+
+    private suspend fun handleMessagesRead(chatId: String, lastReadSequenceId: Int?) {
+        if (lastReadSequenceId == null) {
+            Log.w(TAG, "Messages read event with null sequenceId")
+            return
+        }
+        
+        Log.d(TAG, "Messages read in chat $chatId up to sequenceId $lastReadSequenceId")
+        dao.markMessagesAsRead(chatId, lastReadSequenceId)
+    }
+
+    private suspend fun handleReactionUpdated(messageId: String, emoji: String, isRemoved: Boolean) {
+        Log.d(TAG, "Reaction ${if (isRemoved) "removed" else "added"}: $emoji on message $messageId")
+        
+        val existing = dao.getMessageById(messageId)
+        if (existing != null) {
+            val reactions = gson.fromJson<Map<String, Int>>(existing.reactionsJson, Map::class.java) ?: emptyMap()
+            val updatedReactions = reactions.toMutableMap()
+            
+            if (isRemoved) {
+                val currentCount = updatedReactions[emoji] ?: 0
+                if (currentCount > 1) {
+                    updatedReactions[emoji] = currentCount - 1
+                } else {
+                    updatedReactions.remove(emoji)
+                }
+            } else {
+                updatedReactions[emoji] = (updatedReactions[emoji] ?: 0) + 1
+            }
+            
+            val updated = existing.copy(
+                reactionsJson = gson.toJson(updatedReactions),
+                lastUpdated = System.currentTimeMillis()
+            )
+            dao.insertMessage(updated)
+            Log.d(TAG, "Updated reactions for message: $messageId")
+        }
+    }
+
+    companion object {
+        private const val TAG = "MessageSignalRHandler"
+    }
+}
+

client-mobile/chats/data/sync/MessageSyncWorker.kt

@@ -0,0 +1,225 @@
+package chats.data.sync
+
+import android.content.Context
+import android.util.Log
+import androidx.hilt.work.HiltWorker
+import androidx.work.*
+import chats.data.remote.api.ChatApi
+import chats.data.remote.api.SendMessageRequest
+import core.database.data.MessageDao
+import core.database.data.MessageEntity
+import core.database.data.SyncStatus
+import core.network.ServerConfig
+import core.security.TokenManager
+import com.google.gson.Gson
+import dagger.assisted.Assisted
+import dagger.assisted.AssistedInject
+import java.util.concurrent.TimeUnit
+
+/**
+ * WorkManager Worker для фоновой синхронизации сообщений
+ * 
+ * Обрабатывает:
+ * 1. Отправку новых сообщений (SYNCING)
+ * 2. Обновление отредактированных сообщений (isEditedLocally = true)
+ * 3. Удаление сообщений (isDeletedLocally = true)
+ * 4. Повторную отправку при ошибках (FAILED)
+ * 
+ * Политика повторных попыток:
+ * - Экспоненциальная задержка (backoff)
+ * - Максимум 3 попытки
+ * - Таймаут 10 минут на выполнение
+ */
+@HiltWorker
+class MessageSyncWorker @AssistedInject constructor(
+    @Assisted appContext: Context,
+    @Assisted params: WorkerParameters,
+    private val dao: MessageDao,
+    private val api: ChatApi,
+    private val serverConfig: ServerConfig,
+    private val tokenManager: TokenManager
+) : CoroutineWorker(appContext, params) {
+
+    private val gson = Gson()
+
+    companion object {
+        const val WORK_NAME = "message_sync_worker"
+        private const val TAG = "MessageSyncWorker"
+        
+        /**
+         * Планирует синхронизацию
+         * Вызывается при изменении сообщений в базе
+         */
+        fun scheduleSync(context: Context) {
+            Log.d(TAG, "Scheduling sync")
+            
+            val constraints = Constraints.Builder()
+                .setRequiredNetworkType(NetworkType.CONNECTED)
+                .setRequiresBatteryNotLow(false)
+                .build()
+
+            val workRequest = OneTimeWorkRequestBuilder<MessageSyncWorker>()
+                .setConstraints(constraints)
+                .setBackoffCriteria(
+                    BackoffPolicy.EXPONENTIAL,
+                    WorkRequest.MIN_BACKOFF_MILLIS,
+                    TimeUnit.MILLISECONDS
+                )
+                .addTag(WORK_NAME)
+                .build()
+
+            WorkManager.getInstance(context).enqueueUniqueWork(
+                WORK_NAME,
+                ExistingWorkPolicy.REPLACE,
+                workRequest
+            )
+            
+            Log.d(TAG, "Sync scheduled")
+        }
+        
+        /**
+         * Отменяет запланированную синхронизацию
+         */
+        fun cancelSync(context: Context) {
+            WorkManager.getInstance(context).cancelUniqueWork(WORK_NAME)
+            Log.d(TAG, "Sync cancelled")
+        }
+    }
+
+    override suspend fun doWork(): Result {
+        Log.d(TAG, "Starting message sync. Attempt: ${runAttemptCount + 1}")
+
+        if (runAttemptCount >= 3) {
+            Log.e(TAG, "Max retry attempts reached")
+            return Result.failure()
+        }
+
+        return try {
+            val pendingMessages = dao.getPendingSyncMessages()
+            Log.d(TAG, "Found ${pendingMessages.size} messages to sync")
+
+            if (pendingMessages.isEmpty()) {
+                Log.d(TAG, "No pending messages. Sync complete.")
+                return Result.success()
+            }
+
+            var successCount = 0
+            var failureCount = 0
+
+            for (message in pendingMessages) {
+                try {
+                    when {
+                        message.isDeletedLocally -> {
+                            handleDeleteMessage(message)
+                            successCount++
+                        }
+                        message.isEditedLocally -> {
+                            handleEditMessage(message)
+                            successCount++
+                        }
+                        message.syncStatus == SyncStatus.SYNCING -> {
+                            handleSendMessage(message)
+                            successCount++
+                        }
+                    }
+                } catch (e: Exception) {
+                    Log.e(TAG, "Failed to sync message ${message.id}", e)
+                    dao.markAsSyncFailed(message.id)
+                    failureCount++
+                }
+            }
+
+            Log.d(TAG, "Sync completed. Success: $successCount, Failed: $failureCount")
+
+            if (failureCount > 0 && successCount == 0) {
+                Result.retry()
+            } else {
+                Result.success()
+            }
+
+        } catch (e: Exception) {
+            Log.e(TAG, "Sync failed with exception", e)
+            Result.retry()
+        }
+    }
+
+    private suspend fun handleSendMessage(message: MessageEntity) {
+        Log.d(TAG, "Sending message: ${message.id}")
+        
+        val attachments = parseAttachments(message.mediaJson)
+        val request = SendMessageRequest(
+            content = message.content,
+            type = message.mediaType.lowercase(),
+            attachments = attachments,
+            replyToId = message.replyToId
+        )
+
+        val response = api.sendMessage(message.chatId, request)
+        
+        val syncedMessage = message.copy(
+            id = response.id,
+            sequenceId = response.sequenceId ?: message.sequenceId,
+            createdAt = response.createdAt ?: message.createdAt,
+            syncStatus = SyncStatus.SYNCED,
+            isDeletedLocally = false,
+            isEditedLocally = false,
+            editedContent = null,
+            lastUpdated = System.currentTimeMillis()
+        )
+        
+        dao.insertMessage(syncedMessage)
+        Log.d(TAG, "Message sent successfully: ${response.id}")
+    }
+
+    private suspend fun handleEditMessage(message: MessageEntity) {
+        Log.d(TAG, "Editing message: ${message.id}")
+        
+        val newContent = message.editedContent ?: message.content
+        val request = SendMessageRequest(content = newContent)
+        
+        val response = api.editMessage(message.id, request)
+        
+        val syncedMessage = message.copy(
+            content = response.content,
+            syncStatus = SyncStatus.SYNCED,
+            isEditedLocally = false,
+            editedContent = null,
+            lastUpdated = System.currentTimeMillis()
+        )
+        
+        dao.insertMessage(syncedMessage)
+        Log.d(TAG, "Message edited successfully: ${message.id}")
+    }
+
+    private suspend fun handleDeleteMessage(message: MessageEntity) {
+        Log.d(TAG, "Deleting message: ${message.id}")
+        
+        val response = api.deleteMessage(message.id, forEveryone = false)
+        
+        if (response.isSuccessful || response.code() == 404) {
+            dao.deleteMessage(message.id)
+            Log.d(TAG, "Message deleted successfully: ${message.id}")
+        } else {
+            throw Exception("Delete failed with code: ${response.code()}")
+        }
+    }
+
+    private fun parseAttachments(mediaJson: String): List<chats.data.remote.api.AttachmentRequest>? {
+        return try {
+            val mediaList = gson.fromJson(mediaJson, Array::class.java)
+                ?.map { elem -> 
+                    val map = elem as Map<*, *>
+                    chats.data.remote.api.AttachmentRequest(
+                        type = map["type"] as? String ?: "file",
+                        url = map["url"] as? String ?: "",
+                        fileName = map["filename"] as? String ?: "file",
+                        fileSize = (map["size"] as? Number)?.toLong() ?: 0L
+                    )
+                }
+            mediaList?.takeIf { it.isNotEmpty() }
+        } catch (e: Exception) {
+            Log.e(TAG, "Failed to parse attachments", e)
+            null
+        }
+    }
+}

client-mobile/chats/di/ChatModule.kt

@@ -0,0 +1,70 @@
+package chats.di
+
+import android.content.Context
+import chats.data.remote.api.ChatApi
+import chats.data.remote.signalr.ChatHubClient
+import chats.data.repository.ChatRepositoryImpl
+import chats.data.signalr.MessageSignalRHandler
+import chats.domain.repository.ChatRepository
+import core.database.data.ChatDatabase
+import core.database.data.ChatDao
+import core.database.data.MessageDao
+import core.network.ServerConfig
+import core.security.TokenManager
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+import retrofit2.Retrofit
+import javax.inject.Singleton
+
+@Module
+@InstallIn(SingletonComponent::class)
+object ChatModule {
+
+    @Provides
+    @Singleton
+    fun provideChatApi(retrofit: Retrofit): ChatApi {
+        return retrofit.create(ChatApi::class.java)
+    }
+
+    @Provides
+    @Singleton
+    fun provideMessageSignalRHandler(
+        hubClient: ChatHubClient,
+        dao: MessageDao,
+        serverConfig: ServerConfig,
+        tokenManager: TokenManager
+    ): MessageSignalRHandler {
+        return MessageSignalRHandler(hubClient, dao, serverConfig, tokenManager)
+    }
+
+    @Provides
+    @Singleton
+    fun provideChatDao(database: ChatDatabase): ChatDao {
+        return database.chatDao()
+    }
+
+    @Provides
+    @Singleton
+    fun provideChatRepository(
+        api: ChatApi,
+        tokenManager: TokenManager,
+        serverConfig: ServerConfig,
+        messageDao: MessageDao,
+        chatDao: ChatDao,
+        database: ChatDatabase,
+        hubClient: ChatHubClient,
+        signalRHandler: MessageSignalRHandler,
+        @ApplicationContext context: Context
+    ): ChatRepository {
+        return ChatRepositoryImpl(api, tokenManager, serverConfig, messageDao, chatDao, database, hubClient, signalRHandler, context)
+    }
+
+    @Provides
+    @Singleton
+    fun provideChatHubClient(): ChatHubClient {
+        return ChatHubClient()
+    }
+}

client-mobile/chats/domain/model/ChatModels.kt

@@ -0,0 +1,18 @@
+package chats.domain.model
+
+data class Chat(
+    val id: String,
+    val type: String,
+    val name: String,
+    val avatar: String?,
+    val unreadCount: Int,
+    val lastMessage: Message? = null,
+    val members: List<ChatMember> = emptyList()
+)
+
+data class ChatMember(
+    val userId: String,
+    val username: String,
+    val displayName: String? = null,
+    val avatarUrl: String? = null
+)

client-mobile/chats/domain/model/Message.kt

@@ -0,0 +1,33 @@
+package chats.domain.model
+
+data class Message(
+    val id: String,
+    val chatId: String,
+    val senderId: String,
+    val senderName: String,
+    val senderAvatar: String? = null,
+    val content: String?,
+    val sequenceId: Int,
+    val createdAt: String,
+    val media: List<Media> = emptyList(),
+    val mediaType: MediaType = MediaType.TEXT,
+    val reactions: Map<String, Int> = emptyMap(),
+    val isRead: Boolean = false,
+    val isPinned: Boolean = false,
+    val isForwarded: Boolean = false,
+    val forwardedFromName: String? = null,
+    val replyTo: Message? = null
+)
+
+data class Media(
+    val id: String,
+    val type: String,
+    val url: String,
+    val filename: String? = null,
+    val size: Long? = null,
+    val duration: Double? = null
+)
+
+enum class MediaType {
+    TEXT, IMAGE, VIDEO, AUDIO, FILE, STORY_REPLY, GIF
+}

client-mobile/chats/domain/repository/ChatRepository.kt

@@ -0,0 +1,52 @@
+package chats.domain.repository
+
+import androidx.paging.PagingData
+import chats.domain.model.Chat
+import chats.domain.model.Message
+import kotlinx.coroutines.flow.Flow
+
+interface ChatRepository {
+    suspend fun getChats(): List<Chat>
+    fun getChatsFlow(): Flow<List<Chat>>
+    
+    // Flow для UI (простой список)
+    fun getMessagesFlow(chatId: String): Flow<List<Message>>
+    
+    // Paging 3 для пагинированного списка
+    fun getMessagesPaging(chatId: String): Flow<PagingData<Message>>
+    
+    // Загрузка из сети (для начальной синхронизации)
+    suspend fun getMessages(chatId: String, cursor: String? = null, pivot: Long? = null, afterSequenceId: Long? = null, limit: Int? = null): List<Message>
+    
+    // Получить последний известный sequenceId для чата (из локальной базы)
+    suspend fun getLastKnownSequenceId(chatId: String): Int?
+    
+    suspend fun sendMessage(
+        chatId: String, 
+        content: String?, 
+        type: String = "text",
+        attachments: List<chats.data.remote.api.AttachmentRequest>? = null,
+        replyToId: String? = null,
+        forwardedFromId: String? = null
+    ): Message
+    
+    suspend fun addReaction(messageId: String, emoji: String)
+    suspend fun sendTypingStatus(chatId: String)
+    suspend fun markMessagesAsRead(chatId: String, lastMessageId: String, lastReadSequenceId: Int)
+    
+    // Локальные операции с офлайн-поддержкой
+    suspend fun saveMessage(message: Message)
+    suspend fun deleteLocalMessage(messageId: String)
+    suspend fun editLocalMessage(messageId: String, newContent: String)
+    
+    suspend fun uploadMedia(file: java.io.File): String
+    suspend fun getTrendingGifs(page: Int = 0): List<chats.data.remote.api.KlipyGifDto>
+    suspend fun searchGifs(query: String, page: Int = 0): List<chats.data.remote.api.KlipyGifDto>
+    suspend fun getGifCategories(): List<chats.data.remote.api.GifCategoryDto>
+    suspend fun createPersonalChat(userId: String): Chat
+    
+    // Серверные операции
+    suspend fun deleteMessage(messageId: String, forEveryone: Boolean)
+    suspend fun editMessage(messageId: String, content: String): Message
+}
+

client-mobile/chats/domain/usecase/UploadMediaUseCase.kt

@@ -0,0 +1,24 @@
+package chats.domain.usecase
+
+import chats.data.remote.api.ChatApi
+import chats.data.remote.api.FileUploadResponse
+import okhttp3.MediaType.Companion.toMediaTypeOrNull
+import okhttp3.MultipartBody
+import okhttp3.RequestBody.Companion.asRequestBody
+import java.io.File
+import javax.inject.Inject
+
+class UploadMediaUseCase @Inject constructor(
+    private val api: ChatApi
+) {
+    suspend operator fun invoke(file: File): Result<FileUploadResponse> {
+        return try {
+            val requestFile = file.asRequestBody("image/*".toMediaTypeOrNull())
+            val body = MultipartBody.Part.createFormData("file", file.name, requestFile)
+            val response = api.uploadFile(body)
+            Result.success(response)
+        } catch (e: Exception) {
+            Result.failure(e)
+        }
+    }
+}

client-mobile/chats/presentation/chat_detail/ChatDetailViewModel.kt

@@ -0,0 +1,877 @@
+package chats.presentation.chat_detail
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import chats.data.remote.signalr.ChatEvent
+import chats.data.remote.signalr.ChatHubClient
+import chats.data.remote.signalr.ConnectionStatus
+import chats.data.repository.toDomain
+import chats.domain.model.Message
+import chats.domain.repository.ChatRepository
+import core.network.NetworkManager
+import core.network.ServerConfig
+import core.security.TokenManager
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.Job
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.*
+import kotlinx.coroutines.launch
+import java.io.File
+import javax.inject.Inject
+import core.utils.copyUriToFile
+import core.utils.ImageUtils
+import chats.data.remote.api.KlipyGifDto
+
+private const val TAG = "ChatDetailViewModel"
+
+data class ChatDetailState(
+    val messages: List<Message> = emptyList(),
+    val chatName: String? = null,
+    val chatAvatar: String? = null,
+    val isLoading: Boolean = false,
+    val isLoadingMore: Boolean = false,
+    val isTyping: Boolean = false,
+    val typingUser: String? = null,
+    val error: String? = null,
+    val canCall: Boolean = true,
+    val maxFileSize: Long = 100 * 1024 * 1024,
+    val trendingGifs: List<KlipyGifDto> = emptyList(),
+    val searchedGifs: List<KlipyGifDto> = emptyList(),
+    val recentGifs: List<KlipyGifDto> = emptyList(),
+    val gifCategories: List<chats.data.remote.api.GifCategoryDto> = emptyList(),
+    val isGifsLoading: Boolean = false,
+    val initialScrollIndex: Int? = null,
+    val pendingAttachments: List<File> = emptyList(),
+    val isUploading: Boolean = false,
+    val isCompressionEnabled: Boolean = true,
+    val inputText: String = "",
+    val replyingMessage: Message? = null,
+    val editingMessage: Message? = null,
+    val forwardingMessages: List<Message> = emptyList(),
+    val availableChatsToForward: List<chats.domain.model.Chat> = emptyList(),
+    val selectedMessageIds: Set<String> = emptySet(),
+    val pinnedMessages: List<Message> = emptyList()
+)
+
+@HiltViewModel
+class ChatDetailViewModel @Inject constructor(
+    private val repository: ChatRepository,
+    private val signalrClient: ChatHubClient,
+    private val serverConfig: ServerConfig,
+    private val tokenManager: TokenManager,
+    private val activeChatTracker: core.notifications.data.ActiveChatTracker,
+    private val signalrNotificationObserver: chats.data.remote.signalr.SignalRNotificationObserver,
+    private val networkManager: NetworkManager,
+    @dagger.hilt.android.qualifiers.ApplicationContext private val context: android.content.Context
+) : ViewModel() {
+
+    private val _state = MutableStateFlow(ChatDetailState())
+    val state: StateFlow<ChatDetailState> = _state.asStateFlow()
+
+    private var currentChatId: String? = null
+    private var typingTimerJob: Job? = null
+    private var signalrEventsJob: Job? = null
+    private var lastTypingSentTime: Long = 0
+
+    private val prefs = context.getSharedPreferences("chat_settings", android.content.Context.MODE_PRIVATE)
+
+    init {
+        val config = serverConfig.getServerConfig()
+        val savedCompression = prefs.getBoolean("compression_enabled", true)
+        _state.update { it.copy(
+            canCall = config.features.calls,
+            maxFileSize = config.limits.maxFileSize,
+            isCompressionEnabled = savedCompression
+        ) }
+    }
+
+    fun toggleCompression() {
+        _state.update { currentState ->
+            val newValue = !currentState.isCompressionEnabled
+            prefs.edit().putBoolean("compression_enabled", newValue).apply()
+            currentState.copy(isCompressionEnabled = newValue)
+        }
+    }
+
+    fun getCurrentUserId(): String {
+        return tokenManager.getUserId() ?: ""
+    }
+
+    fun setChatId(chatId: String) {
+        if (currentChatId == chatId) return
+        currentChatId = chatId
+        activeChatTracker.setChatId(chatId)
+        
+        _state.update { it.copy(
+            messages = emptyList(),
+            isLoading = true,
+            initialScrollIndex = null
+        ) }
+        
+        // Ensure SignalR is connected and join the chat room
+        val token = tokenManager.getToken()
+        val baseUrl = serverConfig.getBaseUrl()
+        if (token != null && baseUrl.isNotBlank()) {
+            signalrClient.connect(baseUrl.removeSuffix("/api/"), token)
+            signalrClient.joinChat(chatId)
+        }
+        
+        loadChatInfo(chatId)
+        observeSignalRStatus(chatId)
+        observeSignalREvents(chatId)
+        observeNetworkStatus(chatId)
+        
+        // Initial sync from network
+        refreshMessages(chatId)
+    }
+
+    private fun observeNetworkStatus(chatId: String) {
+        // При восстановлении сети обновляем сообщения
+        networkManager.isOnline
+            .filter { it } // Только переход в онлайн
+            .distinctUntilChanged()
+            .onEach {
+                android.util.Log.d(TAG, "Network restored in chat detail, refreshing messages")
+                kotlinx.coroutines.delay(1000) // Дадим сети стабилизироваться
+                refreshMessages(chatId)
+            }
+            .launchIn(viewModelScope)
+    }
+
+    private fun observeSignalRStatus(chatId: String) {
+        // При переподключении SignalR обновляем сообщения
+        signalrClient.status
+            .filter { it == ConnectionStatus.CONNECTED }
+            .distinctUntilChanged()
+            .onEach {
+                android.util.Log.d(TAG, "SignalR connected, refreshing messages for chat $chatId")
+                refreshMessages(chatId)
+            }
+            .launchIn(viewModelScope)
+    }
+
+    private fun updateMessages(messages: List<Message>) {
+        val sortedMessages = messages.sortedByDescending { it.sequenceId }
+        _state.update { it.copy(
+            messages = sortedMessages,
+            isLoading = false,
+            initialScrollIndex = 0 // In reverse layout, 0 is the bottom
+        ) }
+    }
+
+    fun onInitialScrollDone() {
+        _state.update { it.copy(initialScrollIndex = -1) }
+    }
+
+    fun refreshMessages(chatId: String) {
+        viewModelScope.launch {
+            try {
+                // Сначала пытаемся загрузить из сети
+                val messages = repository.getMessages(chatId)
+                if (messages.isNotEmpty()) {
+                    updateMessages(messages)
+                    return@launch
+                }
+            } catch (e: Exception) {
+                android.util.Log.d(TAG, "Network load failed, trying cache")
+            }
+            
+            // Если сеть не доступна или пуста - загружаем из Room
+            try {
+                val cachedMessages = repository.getMessagesFlow(chatId).first()
+                android.util.Log.d(TAG, "Loaded ${cachedMessages.size} messages from cache")
+                updateMessages(cachedMessages)
+            } catch (e: Exception) {
+                android.util.Log.e(TAG, "Cache load failed", e)
+                _state.update { it.copy(isLoading = false, messages = emptyList()) }
+            }
+        }
+    }
+
+    fun loadMoreMessages() {
+        val chatId = currentChatId ?: return
+        if (_state.value.isLoading || _state.value.isLoadingMore) return
+        
+        val oldestMsg = _state.value.messages.lastOrNull() ?: return
+        
+        viewModelScope.launch {
+            _state.update { it.copy(isLoadingMore = true) }
+            try {
+                android.util.Log.d("ChatDetailVM", "Loading more history before seqId: ${oldestMsg.sequenceId}")
+                val moreMessages = repository.getMessages(chatId, cursor = oldestMsg.sequenceId.toString())
+                if (moreMessages.isNotEmpty()) {
+                    val newSorted = moreMessages.sortedByDescending { it.sequenceId }
+                    _state.update { currentState ->
+                        // Избегаем дубликатов
+                        val existingIds = currentState.messages.map { it.id }.toSet()
+                        val uniqueMore = newSorted.filter { it.id !in existingIds }
+                        currentState.copy(messages = currentState.messages + uniqueMore)
+                    }
+                }
+            } finally {
+                _state.update { it.copy(isLoadingMore = false) }
+            }
+        }
+    }
+
+    private fun loadChatInfo(chatId: String) {
+        viewModelScope.launch {
+            // Пробуем загрузить из API
+            try {
+                val chats = repository.getChats()
+                val chat = chats.find { it.id == chatId }
+                chat?.let { c ->
+                    _state.update { it.copy(chatName = c.name, chatAvatar = c.avatar) }
+                    android.util.Log.d(TAG, "Loaded chat info from API: ${c.name}")
+                    return@launch
+                }
+            } catch (e: Exception) {
+                android.util.Log.d(TAG, "API load failed, will use messages for title")
+            }
+            
+            // Если API недоступно - берём имя из сообщений (для личных чатов)
+            try {
+                val cachedMessages = repository.getMessagesFlow(chatId).first()
+                val otherUserMessage = cachedMessages.firstOrNull { it.senderId != getCurrentUserId() }
+                otherUserMessage?.let { msg ->
+                    _state.update { it.copy(chatName = msg.senderName, chatAvatar = msg.senderAvatar) }
+                    android.util.Log.d(TAG, "Loaded chat title from messages: ${msg.senderName}")
+                }
+            } catch (e: Exception) {
+                android.util.Log.e(TAG, "Failed to load chat title from messages", e)
+            }
+        }
+    }
+
+    private fun updateMessageReaction(messageId: String, userId: String, emoji: String) {
+        _state.update { s ->
+            val updatedMessages = s.messages.map { msg ->
+                if (msg.id == messageId) {
+                    val currentReactions = msg.reactions.toMutableMap()
+                    currentReactions[emoji] = (currentReactions[emoji] ?: 0) + 1
+                    msg.copy(reactions = currentReactions)
+                } else msg
+            }
+            s.copy(messages = updatedMessages)
+        }
+    }
+
+    // For handling reaction removed event
+    private fun removeMessageReaction(messageId: String, userId: String, emoji: String) {
+        _state.update { s ->
+            val updatedMessages = s.messages.map { msg ->
+                if (msg.id == messageId) {
+                    val currentReactions = msg.reactions.toMutableMap()
+                    val count = currentReactions[emoji] ?: 0
+                    if (count > 1) {
+                        currentReactions[emoji] = count - 1
+                    } else {
+                        currentReactions.remove(emoji)
+                    }
+                    msg.copy(reactions = currentReactions)
+                } else msg
+            }
+            s.copy(messages = updatedMessages)
+        }
+    }
+
+    private fun observeSignalREvents(chatId: String) {
+        signalrEventsJob?.cancel()
+        signalrEventsJob = signalrClient.events
+            .onEach { android.util.Log.d("ChatDetailVM", "Received SignalR event: $it for chat: $chatId") }
+            .filter { event -> 
+                val eventChatId = when(event) {
+                    is ChatEvent.NewMessage -> event.message.chatId
+                    is ChatEvent.ReactionUpdated -> event.chatId
+                    is ChatEvent.UserTyping -> event.chatId
+                    is ChatEvent.MessagesRead -> event.chatId
+                    else -> null
+                }
+                
+                if (eventChatId == null) return@filter false
+                
+                val match = eventChatId == chatId || eventChatId.contains(chatId) || chatId.contains(eventChatId)
+                if (match) {
+                    android.util.Log.d("ChatDetailVM", "Event MATCHED chat $chatId: $event")
+                }
+                match
+            }
+            .onEach { event ->
+                when (event) {
+                    is ChatEvent.NewMessage -> {
+                        android.util.Log.d("ChatDetailVM", "New message added to bottom, NOT marking as read automatically")
+                        val baseUrl = serverConfig.getBaseUrl().removeSuffix("/api/")
+                        val domainMsg = event.message.toDomain(getCurrentUserId(), baseUrl)
+                        
+                        _state.update { currentState ->
+                            if (currentState.messages.any { it.id == domainMsg.id }) return@update currentState
+                            currentState.copy(messages = listOf(domainMsg) + currentState.messages)
+                        }
+                    }
+                    is ChatEvent.ReactionUpdated -> {
+                        if (event.isRemoved) {
+                            removeMessageReaction(event.messageId, event.userId, event.emoji)
+                        } else {
+                            updateMessageReaction(event.messageId, event.userId, event.emoji)
+                        }
+                    }
+                    is ChatEvent.MessageDeleted -> {
+                        _state.update { currentState ->
+                            currentState.copy(messages = currentState.messages.filter { it.id != event.messageId })
+                        }
+                    }
+                    is ChatEvent.MessageEdited -> {
+                        _state.update { currentState ->
+                            val updated = currentState.messages.map { msg ->
+                                if (msg.id == event.messageId) msg.copy(content = event.content) else msg
+                            }
+                            currentState.copy(messages = updated)
+                        }
+                    }
+                    is ChatEvent.UserTyping -> {
+                        // Игнорируем свои же typing события
+                        if (event.userId == getCurrentUserId()) {
+                            android.util.Log.d("ChatDetailVM", "Ignoring own typing event")
+                            return@onEach
+                        }
+                        _state.update { it.copy(isTyping = true) }
+                        typingTimerJob?.cancel()
+                        typingTimerJob = viewModelScope.launch {
+                            delay(3000)
+                            _state.update { it.copy(isTyping = false) }
+                        }
+                    }
+                    is ChatEvent.UserStoppedTyping -> {
+                        // Игнорируем свои же события
+                        if (event.userId == getCurrentUserId()) {
+                            android.util.Log.d("ChatDetailVM", "Ignoring own stopped typing event")
+                            return@onEach
+                        }
+                        _state.update { it.copy(isTyping = false) }
+                    }
+                    is ChatEvent.MessagesRead -> {
+                        _state.update { currentState ->
+                            val updatedMessages = currentState.messages.map { msg ->
+                                if (msg.sequenceId <= event.lastReadSequenceId) {
+                                    msg.copy(isRead = true)
+                                } else msg
+                            }
+                            currentState.copy(messages = updatedMessages)
+                        }
+                    }
+                    is ChatEvent.MessagePinned -> {
+                        val baseUrl = serverConfig.getBaseUrl().removeSuffix("/api/")
+                        _state.update { s ->
+                            val domainMsg = event.message.toDomain(getCurrentUserId(), baseUrl)
+                            s.copy(pinnedMessages = (s.pinnedMessages + domainMsg).distinctBy { it.id })
+                        }
+                    }
+                    is ChatEvent.MessageUnpinned -> {
+                        _state.update { s ->
+                            s.copy(pinnedMessages = s.pinnedMessages.filter { it.id != event.messageId })
+                        }
+                    }
+                    else -> Unit
+                }
+            }
+            .launchIn(viewModelScope)
+    }
+
+    fun clearChatId() {
+        android.util.Log.d("ChatDetailVM", "KILLING ALL SESSION JOBS for $currentChatId")
+        signalrEventsJob?.cancel()
+        signalrEventsJob = null
+        currentChatId = null
+        activeChatTracker.setChatId(null)
+        _state.update { it.copy(messages = emptyList(), isLoading = false) }
+    }
+
+    fun markAsRead() {
+        val chatId = currentChatId ?: return
+        val messages = _state.value.messages
+        if (messages.isEmpty()) return
+        
+        // В нашем reverseLayout (newest first) первое сообщение - самое новое от собеседника
+        val currentUserId = getCurrentUserId()
+        val lastMessageFromOther = messages.firstOrNull { it.senderId != currentUserId } ?: return
+        
+        viewModelScope.launch {
+            try {
+                // Мгновенно обновляем в памяти для "галочек"
+                _state.update { currentState ->
+                    val updatedMessages = currentState.messages.map { msg ->
+                        if (msg.senderId != currentUserId && msg.sequenceId <= lastMessageFromOther.sequenceId) {
+                            msg.copy(isRead = true)
+                        } else msg
+                    }
+                    currentState.copy(messages = updatedMessages)
+                }
+                repository.markMessagesAsRead(chatId, lastMessageFromOther.id, lastMessageFromOther.sequenceId)
+                signalrNotificationObserver.refresh()
+            } catch (e: Exception) {
+                // Ignore
+            }
+        }
+    }
+
+    fun onInputTextChanged(text: String) {
+        _state.update { it.copy(inputText = text) }
+        
+        val chatId = currentChatId ?: return
+        
+        // Отправляем индикатор набора текста
+        val now = System.currentTimeMillis()
+        if (now - lastTypingSentTime > 1000) {
+            signalrClient.sendTypingIndicator(chatId)
+            lastTypingSentTime = now
+            
+            // Отправляем "остановился печатать" через 3 секунды
+            typingTimerJob?.cancel()
+            typingTimerJob = viewModelScope.launch {
+                delay(3000)
+                signalrClient.sendUserStoppedTyping(chatId)
+            }
+        }
+    }
+
+
+    fun onReply(message: Message) {
+        _state.update { it.copy(replyingMessage = message) }
+    }
+
+    fun forwardMessages(targetChatId: String, messages: List<Message>) {
+        viewModelScope.launch {
+            messages.forEach { msg ->
+                repository.sendMessage(
+                    chatId = targetChatId,
+                    content = msg.content,
+                    type = msg.mediaType.name.lowercase(),
+                    forwardedFromId = msg.senderId
+                )
+            }
+        }
+    }
+                
+    fun onForward(message: Message) {
+        _state.update { it.copy(forwardingMessages = listOf(message)) }
+        loadChatsForForwarding()
+    }
+
+    fun loadChatsForForwarding() {
+        viewModelScope.launch {
+            try {
+                val chats = repository.getChats()
+                _state.update { it.copy(availableChatsToForward = chats) }
+            } catch (e: Exception) {
+                // Ignore
+            }
+        }
+    }
+
+    fun cancelForwarding() {
+        _state.update { it.copy(forwardingMessages = emptyList(), availableChatsToForward = emptyList()) }
+    }
+
+    fun onForwardSelectedMessages() {
+        val selectedIds = _state.value.selectedMessageIds
+        val messages = _state.value.messages.filter { selectedIds.contains(it.id) }
+        _state.update { it.copy(forwardingMessages = messages) }
+        loadChatsForForwarding()
+    }
+
+    fun toggleSelection(messageId: String) {
+        _state.update { s ->
+            val newSelection = if (s.selectedMessageIds.contains(messageId)) {
+                s.selectedMessageIds - messageId
+            } else {
+                s.selectedMessageIds + messageId
+            }
+            s.copy(selectedMessageIds = newSelection)
+        }
+    }
+
+    fun clearSelection() {
+        _state.update { it.copy(selectedMessageIds = emptySet()) }
+    }
+
+    fun cancelReply() {
+        _state.update { it.copy(replyingMessage = null) }
+    }
+
+    fun cancelEdit() {
+        _state.update { it.copy(editingMessage = null, inputText = "") }
+    }
+
+    fun deleteMessage(message: Message, forEveryone: Boolean) {
+        viewModelScope.launch {
+            try {
+                repository.deleteMessage(message.id, forEveryone)
+                // Local update if needed (will also come via SignalR for everyone, but forMe might need local only update)
+                _state.update { currentState ->
+                    currentState.copy(messages = currentState.messages.filter { it.id != message.id })
+                }
+            } catch (e: Exception) {
+                _state.update { it.copy(error = "Delete failed: ${e.localizedMessage}") }
+            }
+        }
+    }
+
+    fun onEdit(message: Message) {
+        _state.update { it.copy(editingMessage = message, inputText = message.content ?: "", replyingMessage = null) }
+    }
+
+    fun pinMessage(messageId: String) {
+        val chatId = currentChatId ?: return
+        signalrClient.pinMessage(messageId, chatId)
+    }
+
+    fun unpinMessage(messageId: String) {
+        val chatId = currentChatId ?: return
+        signalrClient.unpinMessage(messageId, chatId)
+    }
+
+    fun onPin(message: Message) {
+        pinMessage(message.id)
+    }
+
+    fun sendMessage(onFail: (String) -> Unit = {}) {
+        val chatId = currentChatId ?: return
+        val text = _state.value.inputText
+        val pending = _state.value.pendingAttachments
+        val replyToId = _state.value.replyingMessage?.id
+        val editingMsg = _state.value.editingMessage
+        if (text.isBlank() && pending.isEmpty()) return
+
+        // Handle Edit
+        if (editingMsg != null) {
+            _state.update { it.copy(inputText = "", editingMessage = null) }
+            viewModelScope.launch {
+                try {
+                    val updated = repository.editMessage(editingMsg.id, text)
+                    _state.update { currentState ->
+                        val updatedList = currentState.messages.map { 
+                            if (it.id == updated.id) updated else it 
+                        }
+                        currentState.copy(messages = updatedList)
+                    }
+                } catch (e: Exception) {
+                    _state.update { it.copy(error = "Edit failed: ${e.localizedMessage}") }
+                    onFail(text)
+                }
+            }
+            return
+        }
+
+        // Clear input immediately to avoid double clicks and ensure UI experience
+        _state.update { it.copy(inputText = "", replyingMessage = null) }
+
+        val tempId = "temp_${System.currentTimeMillis()}"
+        val userId = getCurrentUserId()
+
+        // Determine mediaType based on attachments
+        val mediaType = when {
+            pending.isEmpty() -> chats.domain.model.MediaType.TEXT
+            pending.any { it.extension.lowercase() in listOf("jpg", "jpeg", "png", "webp", "gif") } -> chats.domain.model.MediaType.IMAGE
+            pending.any { it.extension.lowercase() in listOf("mp4", "mov", "webm") } -> chats.domain.model.MediaType.VIDEO
+            else -> chats.domain.model.MediaType.TEXT
+        }
+
+        val tempMessage = Message(
+            id = tempId,
+            chatId = chatId,
+            senderId = userId,
+            content = if (text.isBlank()) null else text,
+            createdAt = java.util.Date().toString(),
+            mediaType = mediaType,
+            media = emptyList(),
+            senderName = "Вы",
+            senderAvatar = null,
+            reactions = emptyMap(),
+            isRead = false,
+            sequenceId = 0
+        )
+
+        viewModelScope.launch {
+            repository.saveMessage(tempMessage)
+        }
+
+        viewModelScope.launch {
+            try {
+                // Upload attachments if any
+                val attachmentRequests = if (_state.value.pendingAttachments.isNotEmpty()) {
+                    _state.update { it.copy(isUploading = true) }
+                    val requests = _state.value.pendingAttachments.map { file ->
+                        val url = repository.uploadMedia(file)
+                        chats.data.remote.api.AttachmentRequest(
+                            type = when {
+                                file.extension.lowercase() in listOf("jpg", "jpeg", "png", "webp", "gif", "heic", "heif") -> "image"
+                                file.extension.lowercase() in listOf("mp4", "mov", "3gp", "mkv", "webm") -> "video"
+                                file.extension.lowercase() in listOf("mp3", "m4a", "wav", "aac", "ogg") -> "audio"
+                                else -> "file"
+                            },
+                            url = url,
+                            fileName = file.name,
+                            fileSize = file.length()
+                        )
+                    }
+                    _state.update { it.copy(isUploading = false, pendingAttachments = emptyList()) }
+                    requests
+                } else {
+                    null
+                }
+
+                val sentMessage = repository.sendMessage(
+                    chatId = chatId, 
+                    content = if (text.isBlank()) null else text,
+                    type = if (attachmentRequests != null) "media" else "text",
+                    attachments = attachmentRequests,
+                    replyToId = replyToId
+                )
+                repository.deleteLocalMessage(tempId)
+                repository.saveMessage(sentMessage)
+                // Clear attachments on success
+                _state.update { it.copy(pendingAttachments = emptyList()) }
+            } catch (e: Exception) {
+                repository.deleteLocalMessage(tempId)
+                _state.update { it.copy(error = e.localizedMessage, isUploading = false) }
+                onFail(text)
+            }
+        }
+    }
+
+    fun addReaction(messageId: String, emoji: String) {
+        val chatId = currentChatId ?: return
+        
+        // We rely on SignalR event to update the count to avoid double counting
+        // especially since domain Message doesn't track user IDs for reactions yet.
+        signalrClient.addReaction(messageId, chatId, emoji)
+    }
+
+    fun sendVoiceMessage(file: File) {
+        val chatId = currentChatId ?: return
+        val replyToId = _state.value.replyingMessage?.id
+        _state.update { it.copy(replyingMessage = null) }
+        
+        val tempId = "temp_voice_${System.currentTimeMillis()}"
+        val userId = getCurrentUserId()
+
+        val tempMessage = Message(
+            id = tempId,
+            chatId = chatId,
+            senderId = userId,
+            content = null,
+            createdAt = java.util.Date().toString(),
+            mediaType = chats.domain.model.MediaType.AUDIO,
+            media = emptyList(),
+            senderName = "Вы",
+            reactions = emptyMap(),
+            isRead = false,
+            sequenceId = 0
+        )
+
+        viewModelScope.launch {
+            repository.saveMessage(tempMessage)
+        }
+
+        viewModelScope.launch {
+            try {
+                // 1. Upload the audio file
+                val url = repository.uploadMedia(file)
+                
+                // 2. Send the message with the attachment
+                val attachment = chats.data.remote.api.AttachmentRequest(
+                    type = "voice",
+                    url = url,
+                    fileName = file.name,
+                    fileSize = file.length()
+                )
+                
+                val sentMessage = repository.sendMessage(
+                    chatId = chatId,
+                    content = null,
+                    type = "audio",
+                    attachments = listOf(attachment),
+                    replyToId = replyToId
+                )
+
+                repository.deleteLocalMessage(tempId)
+                repository.saveMessage(sentMessage)
+            } catch (e: Exception) {
+                repository.deleteLocalMessage(tempId)
+                _state.update { it.copy(error = "Ошибка отправки голосового: ${e.localizedMessage}") }
+            }
+        }
+    }
+
+    fun addPendingAttachment(uri: android.net.Uri, context: android.content.Context) {
+        viewModelScope.launch {
+            val mimeType = context.contentResolver.getType(uri) ?: ""
+            val file = if (_state.value.isCompressionEnabled && mimeType.startsWith("image")) {
+                ImageUtils.compressImage(context, uri)
+            } else {
+                copyUriToFile(context, uri)
+            }
+            
+            file?.let { f ->
+                _state.update { it.copy(pendingAttachments = it.pendingAttachments + f) }
+            }
+        }
+    }
+
+    fun formatDateHeader(dateString: String): String {
+        return try {
+            // Парсим ISO 8601 (например 2024-04-14T20:56:00Z)
+            val isoFormat = java.text.SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss", java.util.Locale.US).apply {
+                timeZone = java.util.TimeZone.getTimeZone("UTC")
+            }
+            val date = isoFormat.parse(dateString) ?: return dateString
+            
+            // Форматируем в локальное время: "14 апреля"
+            java.text.SimpleDateFormat("d MMMM", java.util.Locale("ru")).format(date)
+        } catch (e: Exception) {
+            dateString
+        }
+    }
+
+    fun getLocalDateString(isoDate: String): String {
+        return try {
+            val isoFormat = java.text.SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss", java.util.Locale.US).apply {
+                timeZone = java.util.TimeZone.getTimeZone("UTC")
+            }
+            val date = isoFormat.parse(isoDate) ?: return isoDate
+            // Возвращаем просто дату YYYY-MM-DD в локальном часовом поясе для группировки
+            java.text.SimpleDateFormat("yyyy-MM-dd", java.util.Locale.getDefault()).format(date)
+        } catch (e: Exception) {
+            isoDate.split("T").first()
+        }
+    }
+
+    fun removePendingAttachment(file: File) {
+        _state.update { it.copy(pendingAttachments = it.pendingAttachments - file) }
+    }
+
+    fun uploadMedia(file: File) {
+        if (file.length() > _state.value.maxFileSize) {
+            _state.update { it.copy(error = "File too large") }
+            return
+        }
+        viewModelScope.launch {
+             try {
+                 val url = repository.uploadMedia(file)
+                 // After upload, we might want to send a message with this media
+                 // For now, let's just log it or handle as per app requirements
+             } catch (e: Exception) {
+                 _state.update { it.copy(error = e.localizedMessage) }
+             }
+        }
+    }
+
+    fun loadTrendingGifs() {
+        if (_state.value.trendingGifs.isNotEmpty()) return 
+        
+        viewModelScope.launch {
+            _state.update { it.copy(isGifsLoading = true) }
+            try {
+                val gifs = repository.getTrendingGifs(0)
+                _state.update { it.copy(trendingGifs = gifs, isGifsLoading = false) }
+            } catch (e: Exception) {
+                _state.update { it.copy(isGifsLoading = false, error = "GIF load error: ${e.message}") }
+            }
+        }
+    }
+
+    fun loadGifCategories() {
+        if (_state.value.gifCategories.isNotEmpty()) return
+        viewModelScope.launch {
+            try {
+                val categories = repository.getGifCategories()
+                _state.update { it.copy(gifCategories = categories) }
+            } catch (e: Exception) {
+                // Ignore failure
+            }
+        }
+    }
+
+    private var searchJob: Job? = null
+    fun searchGifs(query: String) {
+        searchJob?.cancel()
+        if (query.isBlank()) {
+            _state.update { it.copy(searchedGifs = emptyList()) }
+            return
+        }
+        searchJob = viewModelScope.launch {
+            delay(500)
+            _state.update { it.copy(isGifsLoading = true) }
+            try {
+                val gifs = repository.searchGifs(query, 0)
+                _state.update { it.copy(searchedGifs = gifs, isGifsLoading = false) }
+            } catch (e: Exception) {
+                _state.update { it.copy(isGifsLoading = false) }
+            }
+        }
+    }
+
+    fun sendGif(url: String) {
+        val chatId = currentChatId ?: return
+        val replyToId = _state.value.replyingMessage?.id
+        _state.update { it.copy(replyingMessage = null) }
+
+        val tempId = "temp_gif_${System.currentTimeMillis()}"
+        val userId = getCurrentUserId()
+
+        val tempMessage = Message(
+            id = tempId,
+            chatId = chatId,
+            senderId = userId,
+            content = url,
+            createdAt = java.util.Date().toString(),
+            mediaType = chats.domain.model.MediaType.IMAGE, // We map GIF to IMAGE for rendering
+            media = listOf(chats.domain.model.Media(url = url, type = "image", id = "temp_media")),
+            senderName = "Вы",
+            senderAvatar = null,
+            reactions = emptyMap(),
+            isRead = false,
+            sequenceId = 0
+        )
+
+        viewModelScope.launch {
+            repository.saveMessage(tempMessage)
+        }
+
+        viewModelScope.launch {
+            try {
+                val attachment = chats.data.remote.api.AttachmentRequest(
+                    type = "image",
+                    url = url,
+                    fileName = "gif.gif",
+                    fileSize = 0
+                )
+                val sentMessage = repository.sendMessage(chatId, null, "image", listOf(attachment), replyToId)
+                
+                repository.deleteLocalMessage(tempId)
+                repository.saveMessage(sentMessage)
+
+                // Add to recent
+                val allGifs = _state.value.trendingGifs + _state.value.searchedGifs + _state.value.recentGifs
+                val selectedGif = allGifs.find { gif ->
+                    val gifUrl = gif.files?.get("hd")?.get("gif")?.url 
+                        ?: gif.files?.get("sd")?.get("gif")?.url 
+                        ?: gif.file?.get("hd")?.get("gif")?.url 
+                        ?: gif.file?.get("sd")?.get("gif")?.url 
+                        ?: gif.media_formats?.get("gif")?.url 
+                        ?: gif.images?.original?.url
+                    gifUrl == url
+                }
+                
+                selectedGif?.let { gif ->
+                    val newList = (listOf(gif) + _state.value.recentGifs).distinctBy { it.id }.take(20)
+                    _state.update { it.copy(recentGifs = newList) }
+                }
+            } catch (e: Exception) {
+                repository.deleteLocalMessage(tempId)
+                _state.update { it.copy(error = e.localizedMessage) }
+            }
+        }
+    }
+}
+

client-mobile/chats/presentation/chat_list/ChatListScreen.kt

@@ -0,0 +1,127 @@
+package chats.presentation.chat_list
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.lazy.LazyRow
+import androidx.compose.material3.*
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import chats.presentation.components.ChatItem
+import stories.presentation.StoryViewModel
+import stories.presentation.components.StoryThumbnail
+import ru.knot.messager.R
+
+@Composable
+fun HorizontalDividerComponent(
+    modifier: Modifier = Modifier,
+    thickness: androidx.compose.ui.unit.Dp = 1.dp,
+    color: androidx.compose.ui.graphics.Color = MaterialTheme.colorScheme.outlineVariant
+) {
+    androidx.compose.material3.Divider(
+        modifier = modifier,
+        thickness = thickness,
+        color = color
+    )
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun ChatListScreen(
+    viewModel: ChatListViewModel,
+    storyViewModel: StoryViewModel,
+    onChatClick: (String, String) -> Unit,
+    onStoryClick: (Int) -> Unit
+) {
+    val state by viewModel.state.collectAsState()
+    val storyState by storyViewModel.state.collectAsState()
+
+    androidx.compose.runtime.LaunchedEffect(Unit) {
+        viewModel.loadChats()
+    }
+
+    Scaffold(
+        topBar = {
+            TopAppBar(
+                title = { Text(stringResource(R.string.chats_title), fontWeight = FontWeight.Bold) },
+                colors = TopAppBarDefaults.topAppBarColors(
+                    containerColor = Color.Transparent,
+                    titleContentColor = Color.White
+                )
+            )
+        }
+    ) { paddingValues ->
+        Box(
+            modifier = Modifier
+                .fillMaxSize()
+                .padding(paddingValues)
+        ) {
+            if (state.isLoading && state.chats.isEmpty()) {
+                CircularProgressIndicator(modifier = Modifier.align(Alignment.Center))
+            } else {
+                LazyColumn {
+                    // Ряд историй сверху списка чатов
+                    item {
+                        if (state.isStoriesEnabled && storyState.storyGroups.isNotEmpty()) {
+                            LazyRow(
+                                modifier = Modifier
+                                    .fillMaxWidth()
+                                    .padding(vertical = 8.dp),
+                                contentPadding = PaddingValues(horizontal = 8.dp)
+                            ) {
+                                items(storyState.storyGroups.size) { index ->
+                                    val group = storyState.storyGroups[index]
+                                    StoryThumbnail(
+                                        username = group.username,
+                                        avatarUrl = group.avatar,
+                                        hasUnseen = true, // В идеале проверяем по статусам
+                                        onClick = { onStoryClick(index) }
+                                    )
+                                }
+                            }
+                            HorizontalDividerComponent(
+                                thickness = 0.5.dp,
+                                color = MaterialTheme.colorScheme.outlineVariant
+                            )
+                        }
+                    }
+
+                    if (state.error != null && state.chats.isEmpty()) {
+                        item {
+                            Text(
+                                text = "${stringResource(R.string.error_occurred)}: ${state.error}",
+                                color = MaterialTheme.colorScheme.error,
+                                modifier = Modifier.padding(16.dp)
+                            )
+                        }
+                    } else if (state.chats.isEmpty() && !state.isLoading) {
+                        item {
+                            Box(modifier = Modifier.fillParentMaxSize()) {
+                                Text(
+                                    text = stringResource(R.string.no_chats_found),
+                                    modifier = Modifier.align(Alignment.Center)
+                                )
+                            }
+                        }
+                    } else {
+                        items(state.chats) { chat ->
+                            ChatItem(chat = chat, onClick = { onChatClick(chat.id, chat.name) })
+                            HorizontalDividerComponent(
+                                modifier = Modifier.padding(horizontal = 16.dp),
+                                thickness = 0.5.dp,
+                                color = MaterialTheme.colorScheme.outlineVariant
+                            )
+                        }
+                    }
+                }
+            }
+        }
+    }
+}

client-mobile/chats/presentation/chat_list/ChatListViewModel.kt

@@ -0,0 +1,189 @@
+package chats.presentation.chat_list
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import chats.domain.model.Chat
+import chats.domain.repository.ChatRepository
+import chats.data.remote.signalr.ChatHubClient
+import chats.data.remote.signalr.ConnectionStatus
+import chats.data.remote.signalr.ChatEvent
+import core.network.NetworkManager
+import core.network.ServerConfig
+import core.security.TokenManager
+import dagger.hilt.android.lifecycle.HiltViewModel
+import kotlinx.coroutines.flow.*
+import kotlinx.coroutines.launch
+import javax.inject.Inject
+import chats.data.repository.toDomain
+
+private const val TAG = "ChatListViewModel"
+
+data class ChatListState(
+    val chats: List<Chat> = emptyList(),
+    val isLoading: Boolean = false,
+    val error: String? = null,
+    val isStoriesEnabled: Boolean = true
+)
+
+@HiltViewModel
+class ChatListViewModel @Inject constructor(
+    private val repository: ChatRepository,
+    private val hubClient: ChatHubClient,
+    private val serverConfig: ServerConfig,
+    private val tokenManager: TokenManager,
+    private val networkManager: NetworkManager
+) : ViewModel() {
+
+    private val _state = MutableStateFlow(ChatListState())
+    val state: StateFlow<ChatListState> = _state.asStateFlow()
+
+    init {
+        loadChats()
+        observeSignalRStatus()
+        observeSignalREvents()
+        observeNetworkStatus()
+    }
+
+    private fun observeNetworkStatus() {
+        // При восстановлении сети обновляем чаты
+        networkManager.isOnline
+            .filter { it } // Только переход в онлайн
+            .distinctUntilChanged()
+            .onEach {
+                android.util.Log.d(TAG, "Network restored in chat list, refreshing chats")
+                kotlinx.coroutines.delay(1000) // Дадим сети стабилизироваться
+                repository.getChats()
+            }
+            .launchIn(viewModelScope)
+    }
+
+    private fun getCurrentUserId(): String = tokenManager.getUserId() ?: ""
+
+    fun loadChats() {
+        viewModelScope.launch {
+            _state.update { it.copy(isLoading = true) }
+            try {
+                // Пробуем загрузить из сети (это закэширует в Room)
+                repository.getChats()
+            } catch (e: Exception) {
+                android.util.Log.d(TAG, "Initial load failed, will use cache")
+            }
+            
+            // Подписываемся на Flow из Room (всегда работает, даже оффлайн)
+            repository.getChatsFlow()
+                .catch { e ->
+                    android.util.Log.e(TAG, "Flow error", e)
+                    emit(emptyList())
+                }
+                .collect { chats ->
+                    _state.update { 
+                        it.copy(
+                            chats = sortChats(chats), 
+                            isLoading = false
+                        ) 
+                    }
+                }
+        }
+    }
+
+    private fun observeSignalRStatus() {
+        // Наблюдаем за статусом подключения SignalR и обновляем чаты при переподключении
+        hubClient.status
+            .filter { it == ConnectionStatus.CONNECTED }
+            .distinctUntilChanged()
+            .onEach {
+                android.util.Log.d(TAG, "SignalR connected, refreshing chats")
+                // При переподключении обновляем чаты из сети
+                repository.getChats()
+            }
+            .launchIn(viewModelScope)
+    }
+
+    private fun sortChats(chats: List<Chat>): List<Chat> {
+        return chats.sortedWith(compareByDescending<Chat> { 
+            it.name.equals("Избранное", ignoreCase = true) || it.name.equals("Saved Messages", ignoreCase = true)
+        }.thenByDescending { it.lastMessage?.createdAt })
+    }
+
+    private fun observeSignalREvents() {
+        val baseUrl = serverConfig.getBaseUrl().removeSuffix("/api/")
+        android.util.Log.d(TAG, "Starting to observe SignalR events")
+        hubClient.events
+            .onEach { event ->
+                android.util.Log.d(TAG, ">>> ChatListVM received event: ${event::class.simpleName}")
+                when (event) {
+                    is ChatEvent.NewMessage -> {
+                        updateChatsWithNewMessage(event)
+                    }
+                    is ChatEvent.NewChat -> {
+                        val currentUserId = getCurrentUserId()
+                        _state.update { it.copy(chats = listOf(event.chat.toDomain(currentUserId, baseUrl)) + it.chats) }
+                    }
+                    is ChatEvent.MessagesRead -> {
+                        if (event.userId == getCurrentUserId()) {
+                            _state.update { currentState ->
+                                val updatedChats = currentState.chats.map { chat ->
+                                    if (chat.id == event.chatId) {
+                                        chat.copy(unreadCount = 0)
+                                    } else chat
+                                }
+                                currentState.copy(chats = sortChats(updatedChats))
+                            }
+                        }
+                    }
+                    else -> Unit
+                }
+            }
+            .launchIn(viewModelScope)
+    }
+
+
+    private fun updateChatsWithNewMessage(event: ChatEvent.NewMessage) {
+        val baseUrl = serverConfig.getBaseUrl().removeSuffix("/api/")
+        val currentUserId = getCurrentUserId()
+        
+        _state.update { currentState ->
+            val chatIndex = currentState.chats.indexOfFirst { 
+                it.id.equals(event.message.chatId, ignoreCase = true) 
+            }
+            
+            if (chatIndex >= 0) {
+                // Чат есть в списке - обновляем его
+                val chat = currentState.chats[chatIndex]
+                val isMyMessage = event.message.senderId == currentUserId
+                val isAlreadySeen = chat.lastMessage?.id == event.message.id
+                
+                val lastMsgDomain = event.message.toDomain(currentUserId, baseUrl)
+                val newCount = if (isMyMessage || isAlreadySeen) {
+                    chat.unreadCount 
+                } else {
+                    chat.unreadCount + 1
+                }
+                
+                if (!isAlreadySeen) {
+                    android.util.Log.d("ChatListVM", "Message ${event.message.id} -> Count ${chat.unreadCount} -> $newCount")
+                }
+                
+                val updatedChat = chat.copy(
+                    lastMessage = lastMsgDomain,
+                    unreadCount = newCount
+                )
+                
+                val updatedChats = currentState.chats.toMutableList()
+                updatedChats[chatIndex] = updatedChat
+                currentState.copy(chats = sortChats(updatedChats))
+            } else {
+                // Чата нет в списке - обновляем весь список из репозитория
+                android.util.Log.d("ChatListVM", "Chat ${event.message.chatId} not found in list, refreshing from repository")
+                viewModelScope.launch {
+                    try {
+                        repository.getChats() // Это обновит Room и Flow
+                    } catch (e: Exception) {
+                        android.util.Log.e("ChatListVM", "Failed to refresh chats", e)
+                    }
+                }
+                currentState
+            }
+        }
+    }
+}