Add network packet classes and enums for messaging functionality

- Introduced `AttachmentType` enum to define various attachment types.
- Added `DeliveryStatus` enum to represent message delivery statuses.
- Created `MessageAttachment` data class to encapsulate message attachments.
- Implemented `OnlineState` enum to manage user online statuses.
- Developed various packet classes: `Packet`, `PacketHandshake`, `PacketResult`, `PacketSearch`, `PacketUserInfo`, `PacketOnlineState`, `PacketOnlineSubscribe`, `PacketMessage`, `PacketRead`, `PacketDelivery`, `PacketTyping`, `PacketChunk`, `PacketPushNotification`, `PacketRequestTransport`, and `PacketPushToken` for handling different messaging operations.
- Removed the old `Packets.kt` file to streamline the codebase.
- Added `SearchUser` data class for user search results.

app/src/main/java/com/rosetta/messenger/network/AttachmentType.kt

@@ -0,0 +1,15 @@
+package com.rosetta.messenger.network
+
+/**
+ * Типы вложений
+ */
+enum class AttachmentType(val value: Int) {
+    IMAGE(0),       // Изображение
+    MESSAGES(1),    // Reply (цитата сообщения)
+    FILE(2),        // Файл
+    AVATAR(3);      // Аватар пользователя
+
+    companion object {
+        fun fromInt(value: Int) = entries.firstOrNull { it.value == value } ?: IMAGE
+    }
+}

app/src/main/java/com/rosetta/messenger/network/DeliveryStatus.kt

@@ -0,0 +1,15 @@
+package com.rosetta.messenger.network
+
+/**
+ * Статус доставки сообщения
+ */
+enum class DeliveryStatus(val value: Int) {
+    WAITING(0),     // Ожидает отправки
+    DELIVERED(1),   // Доставлено
+    ERROR(2),       // Ошибка
+    READ(3);        // Прочитано
+
+    companion object {
+        fun fromInt(value: Int) = entries.firstOrNull { it.value == value } ?: WAITING
+    }
+}

app/src/main/java/com/rosetta/messenger/network/MessageAttachment.kt

@@ -0,0 +1,14 @@
+package com.rosetta.messenger.network
+
+/**
+ * Вложение к сообщению
+ */
+data class MessageAttachment(
+    val id: String,
+    val blob: String,           // Base64 данные или пусто для CDN
+    val type: AttachmentType,
+    val preview: String = "",   // Метаданные: "UUID::metadata" или "filesize::filename"
+    val width: Int = 0,
+    val height: Int = 0,
+    val localUri: String = ""   // 🚀 Локальный URI для мгновенного отображения (optimistic UI)
+)

app/src/main/java/com/rosetta/messenger/network/OnlineState.kt

@@ -0,0 +1,13 @@
+package com.rosetta.messenger.network
+
+/**
+ * Online State enum
+ */
+enum class OnlineState(val value: Int) {
+    ONLINE(0),
+    OFFLINE(1);
+
+    companion object {
+        fun fromBoolean(isOnline: Boolean) = if (isOnline) ONLINE else OFFLINE
+    }
+}

app/src/main/java/com/rosetta/messenger/network/Packet.kt

@@ -0,0 +1,10 @@
+package com.rosetta.messenger.network
+
+/**
+ * Base class for all protocol packets
+ */
+abstract class Packet {
+    abstract fun getPacketId(): Int
+    abstract fun receive(stream: Stream)
+    abstract fun send(): Stream
+}

app/src/main/java/com/rosetta/messenger/network/PacketChunk.kt

@@ -0,0 +1,34 @@
+package com.rosetta.messenger.network
+
+/**
+ * Chunk packet (ID: 0x09)
+ * Для разбиения больших пакетов на части (как в Desktop)
+ * ВАЖНО: chunkIndex и totalChunks - Int16, не Int32!
+ */
+class PacketChunk : Packet() {
+    var chunkId: String = ""
+    var chunkIndex: Int = 0
+    var totalChunks: Int = 0
+    var data: ByteArray = ByteArray(0)
+
+    override fun getPacketId(): Int = 0x09
+
+    override fun receive(stream: Stream) {
+        // В Desktop: readInt16 для index и total
+        chunkIndex = stream.readInt16()
+        totalChunks = stream.readInt16()
+        chunkId = stream.readString()
+        data = stream.readBytes()
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        // В Desktop: writeInt16 для index и total
+        stream.writeInt16(chunkIndex)
+        stream.writeInt16(totalChunks)
+        stream.writeString(chunkId)
+        stream.writeBytes(data)
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketDelivery.kt

@@ -0,0 +1,28 @@
+package com.rosetta.messenger.network
+
+/**
+ * Delivery packet (ID: 0x08)
+ * Уведомление о доставке сообщения
+ * Порядок полей как в React Native: toPublicKey, messageId
+ */
+class PacketDelivery : Packet() {
+    var messageId: String = ""
+    var toPublicKey: String = ""
+
+    override fun getPacketId(): Int = 0x08
+
+    override fun receive(stream: Stream) {
+        // React Native читает: toPublicKey, messageId
+        toPublicKey = stream.readString()
+        messageId = stream.readString()
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        // React Native пишет: toPublicKey, messageId
+        stream.writeString(toPublicKey)
+        stream.writeString(messageId)
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketHandshake.kt

@@ -0,0 +1,31 @@
+package com.rosetta.messenger.network
+
+/**
+ * Handshake packet (ID: 0x00)
+ * First packet sent by client to authenticate with the server
+ */
+class PacketHandshake : Packet() {
+    var privateKey: String = ""
+    var publicKey: String = ""
+    var protocolVersion: Int = 1
+    var heartbeatInterval: Int = 15
+
+    override fun getPacketId(): Int = 0x00
+
+    override fun receive(stream: Stream) {
+        privateKey = stream.readString()
+        publicKey = stream.readString()
+        protocolVersion = stream.readInt8()
+        heartbeatInterval = stream.readInt8()
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        stream.writeString(privateKey)
+        stream.writeString(publicKey)
+        stream.writeInt8(protocolVersion)
+        stream.writeInt8(heartbeatInterval)
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketMessage.kt

@@ -0,0 +1,62 @@
+package com.rosetta.messenger.network
+
+/**
+ * Message packet (ID: 0x06)
+ * Отправка и получение сообщений
+ */
+class PacketMessage : Packet() {
+    var fromPublicKey: String = ""
+    var toPublicKey: String = ""
+    var content: String = ""            // Зашифрованный текст
+    var chachaKey: String = ""          // RSA зашифрованный ключ
+    var timestamp: Long = 0
+    var privateKey: String = ""         // Hash приватного ключа (для авторизации)
+    var messageId: String = ""
+    var attachments: List<MessageAttachment> = emptyList()
+
+    override fun getPacketId(): Int = 0x06
+
+    override fun receive(stream: Stream) {
+        fromPublicKey = stream.readString()
+        toPublicKey = stream.readString()
+        content = stream.readString()
+        chachaKey = stream.readString()
+        timestamp = stream.readInt64()
+        privateKey = stream.readString()
+        messageId = stream.readString()
+
+        val attachmentCount = stream.readInt8()
+        val attachmentsList = mutableListOf<MessageAttachment>()
+        for (i in 0 until attachmentCount) {
+            attachmentsList.add(MessageAttachment(
+                id = stream.readString(),
+                preview = stream.readString(),
+                blob = stream.readString(),
+                type = AttachmentType.fromInt(stream.readInt8())
+            ))
+        }
+        attachments = attachmentsList
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        stream.writeString(fromPublicKey)
+        stream.writeString(toPublicKey)
+        stream.writeString(content)
+        stream.writeString(chachaKey)
+        stream.writeInt64(timestamp)
+        stream.writeString(privateKey)
+        stream.writeString(messageId)
+        stream.writeInt8(attachments.size)
+
+        for (attachment in attachments) {
+            stream.writeString(attachment.id)
+            stream.writeString(attachment.preview)
+            stream.writeString(attachment.blob)
+            stream.writeInt8(attachment.type.value)
+        }
+
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketOnlineState.kt

@@ -0,0 +1,41 @@
+package com.rosetta.messenger.network
+
+/**
+ * Public key with online state
+ */
+data class PublicKeyOnlineState(
+    val publicKey: String,
+    val state: OnlineState
+)
+
+/**
+ * Online State packet (ID: 0x05)
+ * Notify about user online status
+ * Формат как в React Native: массив {publicKey, state}
+ */
+class PacketOnlineState : Packet() {
+    var publicKeysState: MutableList<PublicKeyOnlineState> = mutableListOf()
+
+    override fun getPacketId(): Int = 0x05
+
+    override fun receive(stream: Stream) {
+        val count = stream.readInt8()
+        publicKeysState.clear()
+        repeat(count) {
+            val publicKey = stream.readString()
+            val isOnline = stream.readBoolean()
+            publicKeysState.add(PublicKeyOnlineState(publicKey, OnlineState.fromBoolean(isOnline)))
+        }
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        stream.writeInt8(publicKeysState.size)
+        publicKeysState.forEach { item ->
+            stream.writeString(item.publicKey)
+            stream.writeBoolean(item.state == OnlineState.ONLINE)
+        }
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketOnlineSubscribe.kt

@@ -0,0 +1,37 @@
+package com.rosetta.messenger.network
+
+/**
+ * Online Subscribe packet (ID: 0x04)
+ * Subscribe to user online status updates
+ * Формат как в React Native: privateKey + array of publicKeys
+ */
+class PacketOnlineSubscribe : Packet() {
+    var privateKey: String = ""
+    var publicKeys: MutableList<String> = mutableListOf()
+
+    override fun getPacketId(): Int = 0x04
+
+    override fun receive(stream: Stream) {
+        privateKey = stream.readString()
+        val keysCount = stream.readInt16()
+        publicKeys.clear()
+        repeat(keysCount) {
+            publicKeys.add(stream.readString())
+        }
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        stream.writeString(privateKey)
+        stream.writeInt16(publicKeys.size)
+        publicKeys.forEach { key ->
+            stream.writeString(key)
+        }
+        return stream
+    }
+
+    fun addPublicKey(publicKey: String) {
+        publicKeys.add(publicKey)
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketPushNotification.kt

@@ -0,0 +1,37 @@
+package com.rosetta.messenger.network
+
+/**
+ * Push Notification Action
+ */
+enum class PushNotificationAction(val value: Int) {
+    SUBSCRIBE(0),
+    UNSUBSCRIBE(1)
+}
+
+/**
+ * Push Notification packet (ID: 0x10)
+ * Отправка FCM/APNS токена на сервер для push-уведомлений (новый формат)
+ * Совместим с React Native версией
+ */
+class PacketPushNotification : Packet() {
+    var notificationsToken: String = ""
+    var action: PushNotificationAction = PushNotificationAction.SUBSCRIBE
+
+    override fun getPacketId(): Int = 0x10
+
+    override fun receive(stream: Stream) {
+        notificationsToken = stream.readString()
+        action = when (stream.readInt8()) {
+            1 -> PushNotificationAction.UNSUBSCRIBE
+            else -> PushNotificationAction.SUBSCRIBE
+        }
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        stream.writeString(notificationsToken)
+        stream.writeInt8(action.value)
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketPushToken.kt

@@ -0,0 +1,31 @@
+package com.rosetta.messenger.network
+
+/**
+ * Push Token packet (ID: 0x0A) - DEPRECATED
+ * Старый формат, заменен на PacketPushNotification (0x10)
+ */
+class PacketPushToken : Packet() {
+    var privateKey: String = ""
+    var publicKey: String = ""
+    var pushToken: String = ""
+    var platform: String = "android" // "android" или "ios"
+
+    override fun getPacketId(): Int = 0x0A
+
+    override fun receive(stream: Stream) {
+        privateKey = stream.readString()
+        publicKey = stream.readString()
+        pushToken = stream.readString()
+        platform = stream.readString()
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        stream.writeString(privateKey)
+        stream.writeString(publicKey)
+        stream.writeString(pushToken)
+        stream.writeString(platform)
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketRead.kt

@@ -0,0 +1,31 @@
+package com.rosetta.messenger.network
+
+/**
+ * Read packet (ID: 0x07)
+ * Уведомление о прочтении сообщения
+ * Порядок полей как в Desktop: privateKey, fromPublicKey, toPublicKey
+ */
+class PacketRead : Packet() {
+    var privateKey: String = ""
+    var fromPublicKey: String = ""
+    var toPublicKey: String = ""
+
+    override fun getPacketId(): Int = 0x07
+
+    override fun receive(stream: Stream) {
+        // Desktop: privateKey, fromPublicKey, toPublicKey
+        privateKey = stream.readString()
+        fromPublicKey = stream.readString()
+        toPublicKey = stream.readString()
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        // Desktop: privateKey, fromPublicKey, toPublicKey
+        stream.writeString(privateKey)
+        stream.writeString(fromPublicKey)
+        stream.writeString(toPublicKey)
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketRequestTransport.kt

@@ -0,0 +1,22 @@
+package com.rosetta.messenger.network
+
+/**
+ * Request Transport packet (ID: 0x0F)
+ * Запрос адреса транспортного сервера для загрузки/скачивания файлов
+ */
+class PacketRequestTransport : Packet() {
+    var transportServer: String = ""
+
+    override fun getPacketId(): Int = 0x0F
+
+    override fun receive(stream: Stream) {
+        transportServer = stream.readString()
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        stream.writeString(transportServer)
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketResult.kt

@@ -0,0 +1,24 @@
+package com.rosetta.messenger.network
+
+/**
+ * Result packet (ID: 0x02)
+ * Server response for various operations
+ * Desktop uses: readInt16() for resultCode only
+ */
+class PacketResult : Packet() {
+    var resultCode: Int = 0
+
+    override fun getPacketId(): Int = 0x02
+
+    override fun receive(stream: Stream) {
+        // Desktop: this.resultCode = stream.readInt16();
+        resultCode = stream.readInt16()
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        stream.writeInt16(resultCode)
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketSearch.kt

@@ -0,0 +1,40 @@
+package com.rosetta.messenger.network
+
+/**
+ * Search packet (ID: 0x03)
+ * Search for users by username or public key
+ */
+class PacketSearch : Packet() {
+    var privateKey: String = ""
+    var search: String = ""
+    var users: List<SearchUser> = emptyList()
+
+    override fun getPacketId(): Int = 0x03
+
+    override fun receive(stream: Stream) {
+        privateKey = stream.readString()
+        search = stream.readString()
+        val userCount = stream.readInt16() // Int16, not Int32!
+        val usersList = mutableListOf<SearchUser>()
+        for (i in 0 until userCount) {
+            // Order: username, title, publicKey, verified, online (matching React Native)
+            val user = SearchUser(
+                username = stream.readString(),
+                title = stream.readString(),
+                publicKey = stream.readString(),
+                verified = stream.readInt8(),
+                online = stream.readInt8()
+            )
+            usersList.add(user)
+        }
+        users = usersList
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        stream.writeString(privateKey)
+        stream.writeString(search)
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketTyping.kt

@@ -0,0 +1,28 @@
+package com.rosetta.messenger.network
+
+/**
+ * Typing packet (ID: 0x0B)
+ * Порядок полей как в React Native: privateKey, fromPublicKey, toPublicKey
+ */
+class PacketTyping : Packet() {
+    var privateKey: String = ""
+    var fromPublicKey: String = ""
+    var toPublicKey: String = ""
+
+    override fun getPacketId(): Int = 0x0B
+
+    override fun receive(stream: Stream) {
+        privateKey = stream.readString()
+        fromPublicKey = stream.readString()
+        toPublicKey = stream.readString()
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        stream.writeString(privateKey)
+        stream.writeString(fromPublicKey)
+        stream.writeString(toPublicKey)
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/PacketUserInfo.kt

@@ -0,0 +1,29 @@
+package com.rosetta.messenger.network
+
+/**
+ * User Info packet (ID: 0x01)
+ * Get/Set user information
+ * Protocol order: username, title, privateKey (matching TypeScript version)
+ */
+class PacketUserInfo : Packet() {
+    var privateKey: String = ""
+    var username: String = ""
+    var title: String = ""
+
+    override fun getPacketId(): Int = 0x01
+
+    override fun receive(stream: Stream) {
+        username = stream.readString()
+        title = stream.readString()
+        privateKey = stream.readString()
+    }
+
+    override fun send(): Stream {
+        val stream = Stream()
+        stream.writeInt16(getPacketId())
+        stream.writeString(username)
+        stream.writeString(title)
+        stream.writeString(privateKey)
+        return stream
+    }
+}

app/src/main/java/com/rosetta/messenger/network/Packets.kt

@@ -1,540 +0,0 @@
-package com.rosetta.messenger.network
-
-/**
- * Base class for all protocol packets
- */
-abstract class Packet {
-    abstract fun getPacketId(): Int
-    abstract fun receive(stream: Stream)
-    abstract fun send(): Stream
-}
-
-/**
- * Handshake packet (ID: 0x00)
- * First packet sent by client to authenticate with the server
- */
-class PacketHandshake : Packet() {
-    var privateKey: String = ""
-    var publicKey: String = ""
-    var protocolVersion: Int = 1
-    var heartbeatInterval: Int = 15
-    
-    override fun getPacketId(): Int = 0x00
-    
-    override fun receive(stream: Stream) {
-        privateKey = stream.readString()
-        publicKey = stream.readString()
-        protocolVersion = stream.readInt8()
-        heartbeatInterval = stream.readInt8()
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        stream.writeString(privateKey)
-        stream.writeString(publicKey)
-        stream.writeInt8(protocolVersion)
-        stream.writeInt8(heartbeatInterval)
-        return stream
-    }
-}
-
-/**
- * Result packet (ID: 0x02)
- * Server response for various operations
- * Desktop uses: readInt16() for resultCode only
- */
-class PacketResult : Packet() {
-    var resultCode: Int = 0
-    
-    override fun getPacketId(): Int = 0x02
-    
-    override fun receive(stream: Stream) {
-        // Desktop: this.resultCode = stream.readInt16();
-        resultCode = stream.readInt16()
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        stream.writeInt16(resultCode)
-        return stream
-    }
-}
-
-/**
- * Search packet (ID: 0x03)
- * Search for users by username or public key
- */
-class PacketSearch : Packet() {
-    var privateKey: String = ""
-    var search: String = ""
-    var users: List<SearchUser> = emptyList()
-    
-    override fun getPacketId(): Int = 0x03
-    
-    override fun receive(stream: Stream) {
-        privateKey = stream.readString()
-        search = stream.readString()
-        val userCount = stream.readInt16() // Int16, not Int32!
-        val usersList = mutableListOf<SearchUser>()
-        for (i in 0 until userCount) {
-            // Order: username, title, publicKey, verified, online (matching React Native)
-            val user = SearchUser(
-                username = stream.readString(),
-                title = stream.readString(),
-                publicKey = stream.readString(),
-                verified = stream.readInt8(),
-                online = stream.readInt8()
-            )
-            usersList.add(user)
-        }
-        users = usersList
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        stream.writeString(privateKey)
-        stream.writeString(search)
-        return stream
-    }
-}
-
-data class SearchUser(
-    val publicKey: String,
-    val title: String,
-    val username: String,
-    val verified: Int,
-    val online: Int
-)
-
-/**
- * User Info packet (ID: 0x01)
- * Get/Set user information
- * Protocol order: username, title, privateKey (matching TypeScript version)
- */
-class PacketUserInfo : Packet() {
-    var privateKey: String = ""
-    var username: String = ""
-    var title: String = ""
-    
-    override fun getPacketId(): Int = 0x01
-    
-    override fun receive(stream: Stream) {
-        username = stream.readString()
-        title = stream.readString()
-        privateKey = stream.readString()
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        stream.writeString(username)
-        stream.writeString(title)
-        stream.writeString(privateKey)
-        return stream
-    }
-}
-
-/**
- * Online State enum
- */
-enum class OnlineState(val value: Int) {
-    ONLINE(0),
-    OFFLINE(1);
-    
-    companion object {
-        fun fromBoolean(isOnline: Boolean) = if (isOnline) ONLINE else OFFLINE
-    }
-}
-
-/**
- * Public key with online state
- */
-data class PublicKeyOnlineState(
-    val publicKey: String,
-    val state: OnlineState
-)
-
-/**
- * Online State packet (ID: 0x05)
- * Notify about user online status
- * Формат как в React Native: массив {publicKey, state}
- */
-class PacketOnlineState : Packet() {
-    var publicKeysState: MutableList<PublicKeyOnlineState> = mutableListOf()
-    
-    override fun getPacketId(): Int = 0x05
-    
-    override fun receive(stream: Stream) {
-        val count = stream.readInt8()
-        publicKeysState.clear()
-        repeat(count) {
-            val publicKey = stream.readString()
-            val isOnline = stream.readBoolean()
-            publicKeysState.add(PublicKeyOnlineState(publicKey, OnlineState.fromBoolean(isOnline)))
-        }
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        stream.writeInt8(publicKeysState.size)
-        publicKeysState.forEach { item ->
-            stream.writeString(item.publicKey)
-            stream.writeBoolean(item.state == OnlineState.ONLINE)
-        }
-        return stream
-    }
-}
-
-/**
- * Online Subscribe packet (ID: 0x04)
- * Subscribe to user online status updates
- * Формат как в React Native: privateKey + array of publicKeys
- */
-class PacketOnlineSubscribe : Packet() {
-    var privateKey: String = ""
-    var publicKeys: MutableList<String> = mutableListOf()
-    
-    override fun getPacketId(): Int = 0x04
-    
-    override fun receive(stream: Stream) {
-        privateKey = stream.readString()
-        val keysCount = stream.readInt16()
-        publicKeys.clear()
-        repeat(keysCount) {
-            publicKeys.add(stream.readString())
-        }
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        stream.writeString(privateKey)
-        stream.writeInt16(publicKeys.size)
-        publicKeys.forEach { key ->
-            stream.writeString(key)
-        }
-        return stream
-    }
-    
-    fun addPublicKey(publicKey: String) {
-        publicKeys.add(publicKey)
-    }
-}
-
-// ============================================================================
-// MESSAGE PACKETS - Как в React Native версии
-// ============================================================================
-
-/**
- * Типы вложений
- */
-enum class AttachmentType(val value: Int) {
-    IMAGE(0),       // Изображение
-    MESSAGES(1),    // Reply (цитата сообщения)
-    FILE(2),        // Файл
-    AVATAR(3);      // Аватар пользователя
-    
-    companion object {
-        fun fromInt(value: Int) = entries.firstOrNull { it.value == value } ?: IMAGE
-    }
-}
-
-/**
- * Статус доставки сообщения
- */
-enum class DeliveryStatus(val value: Int) {
-    WAITING(0),     // Ожидает отправки
-    DELIVERED(1),   // Доставлено
-    ERROR(2),       // Ошибка
-    READ(3);        // Прочитано
-
-    companion object {
-        fun fromInt(value: Int) = entries.firstOrNull { it.value == value } ?: WAITING
-    }
-}
-
-/**
- * Вложение к сообщению
- */
-data class MessageAttachment(
-    val id: String,
-    val blob: String,           // Base64 данные или пусто для CDN
-    val type: AttachmentType,
-    val preview: String = "",   // Метаданные: "UUID::metadata" или "filesize::filename"
-    val width: Int = 0,
-    val height: Int = 0,
-    val localUri: String = ""   // 🚀 Локальный URI для мгновенного отображения (optimistic UI)
-)
-
-/**
- * Message packet (ID: 0x06)
- * Отправка и получение сообщений
- */
-class PacketMessage : Packet() {
-    var fromPublicKey: String = ""
-    var toPublicKey: String = ""
-    var content: String = ""            // Зашифрованный текст
-    var chachaKey: String = ""          // RSA зашифрованный ключ
-    var timestamp: Long = 0
-    var privateKey: String = ""         // Hash приватного ключа (для авторизации)
-    var messageId: String = ""
-    var attachments: List<MessageAttachment> = emptyList()
-    
-    override fun getPacketId(): Int = 0x06
-    
-    override fun receive(stream: Stream) {
-        fromPublicKey = stream.readString()
-        toPublicKey = stream.readString()
-        content = stream.readString()
-        chachaKey = stream.readString()
-        timestamp = stream.readInt64()
-        privateKey = stream.readString()
-        messageId = stream.readString()
-        
-        val attachmentCount = stream.readInt8()
-        val attachmentsList = mutableListOf<MessageAttachment>()
-        for (i in 0 until attachmentCount) {
-            attachmentsList.add(MessageAttachment(
-                id = stream.readString(),
-                preview = stream.readString(),
-                blob = stream.readString(),
-                type = AttachmentType.fromInt(stream.readInt8())
-            ))
-        }
-        attachments = attachmentsList
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        stream.writeString(fromPublicKey)
-        stream.writeString(toPublicKey)
-        stream.writeString(content)
-        stream.writeString(chachaKey)
-        stream.writeInt64(timestamp)
-        stream.writeString(privateKey)
-        stream.writeString(messageId)
-        stream.writeInt8(attachments.size)
-        
-        for (attachment in attachments) {
-            stream.writeString(attachment.id)
-            stream.writeString(attachment.preview)
-            stream.writeString(attachment.blob)
-            stream.writeInt8(attachment.type.value)
-        }
-        
-        return stream
-    }
-}
-
-/**
- * Read packet (ID: 0x07)
- * Уведомление о прочтении сообщения
- * Порядок полей как в Desktop: privateKey, fromPublicKey, toPublicKey
- */
-class PacketRead : Packet() {
-    var privateKey: String = ""
-    var fromPublicKey: String = ""
-    var toPublicKey: String = ""
-    
-    override fun getPacketId(): Int = 0x07
-    
-    override fun receive(stream: Stream) {
-        // Desktop: privateKey, fromPublicKey, toPublicKey
-        privateKey = stream.readString()
-        fromPublicKey = stream.readString()
-        toPublicKey = stream.readString()
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        // Desktop: privateKey, fromPublicKey, toPublicKey
-        stream.writeString(privateKey)
-        stream.writeString(fromPublicKey)
-        stream.writeString(toPublicKey)
-        return stream
-    }
-}
-
-/**
- * Delivery packet (ID: 0x08)
- * Уведомление о доставке сообщения
- * Порядок полей как в React Native: toPublicKey, messageId
- */
-class PacketDelivery : Packet() {
-    var messageId: String = ""
-    var toPublicKey: String = ""
-    
-    override fun getPacketId(): Int = 0x08
-    
-    override fun receive(stream: Stream) {
-        // React Native читает: toPublicKey, messageId
-        toPublicKey = stream.readString()
-        messageId = stream.readString()
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        // React Native пишет: toPublicKey, messageId
-        stream.writeString(toPublicKey)
-        stream.writeString(messageId)
-        return stream
-    }
-}
-
-/**
- * Typing packet (ID: 0x0B)
- * Уведомление "печатает..."
- */
-/**
- * Typing packet (ID: 0x0B)
- * Порядок полей как в React Native: privateKey, fromPublicKey, toPublicKey
- */
-class PacketTyping : Packet() {
-    var privateKey: String = ""
-    var fromPublicKey: String = ""
-    var toPublicKey: String = ""
-    
-    override fun getPacketId(): Int = 0x0B
-    
-    override fun receive(stream: Stream) {
-        privateKey = stream.readString()
-        fromPublicKey = stream.readString()
-        toPublicKey = stream.readString()
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        stream.writeString(privateKey)
-        stream.writeString(fromPublicKey)
-        stream.writeString(toPublicKey)
-        return stream
-    }
-}
-
-/**
- * Chunk packet (ID: 0x09)
- * Для разбиения больших пакетов на части (как в Desktop)
- * ВАЖНО: chunkIndex и totalChunks - Int16, не Int32!
- */
-class PacketChunk : Packet() {
-    var chunkId: String = ""
-    var chunkIndex: Int = 0
-    var totalChunks: Int = 0
-    var data: ByteArray = ByteArray(0)
-    
-    override fun getPacketId(): Int = 0x09
-    
-    override fun receive(stream: Stream) {
-        // В Desktop: readInt16 для index и total
-        chunkIndex = stream.readInt16()
-        totalChunks = stream.readInt16()
-        chunkId = stream.readString()
-        data = stream.readBytes()
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        // В Desktop: writeInt16 для index и total
-        stream.writeInt16(chunkIndex)
-        stream.writeInt16(totalChunks)
-        stream.writeString(chunkId)
-        stream.writeBytes(data)
-        return stream
-    }
-}
-
-/**
- * Push Token packet (ID: 0x0A) - DEPRECATED
- * Старый формат, заменен на PacketPushNotification (0x10)
- */
-class PacketPushToken : Packet() {
-    var privateKey: String = ""
-    var publicKey: String = ""
-    var pushToken: String = ""
-    var platform: String = "android" // "android" или "ios"
-    
-    override fun getPacketId(): Int = 0x0A
-    
-    override fun receive(stream: Stream) {
-        privateKey = stream.readString()
-        publicKey = stream.readString()
-        pushToken = stream.readString()
-        platform = stream.readString()
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        stream.writeString(privateKey)
-        stream.writeString(publicKey)
-        stream.writeString(pushToken)
-        stream.writeString(platform)
-        return stream
-    }
-}
-
-/**
- * Push Notification Action
- */
-enum class PushNotificationAction(val value: Int) {
-    SUBSCRIBE(0),
-    UNSUBSCRIBE(1)
-}
-
-/**
- * Push Notification packet (ID: 0x10)
- * Отправка FCM/APNS токена на сервер для push-уведомлений (новый формат)
- * Совместим с React Native версией
- */
-class PacketPushNotification : Packet() {
-    var notificationsToken: String = ""
-    var action: PushNotificationAction = PushNotificationAction.SUBSCRIBE
-    
-    override fun getPacketId(): Int = 0x10
-    
-    override fun receive(stream: Stream) {
-        notificationsToken = stream.readString()
-        action = when (stream.readInt8()) {
-            1 -> PushNotificationAction.UNSUBSCRIBE
-            else -> PushNotificationAction.SUBSCRIBE
-        }
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        stream.writeString(notificationsToken)
-        stream.writeInt8(action.value)
-        return stream
-    }
-}
-
-/**
- * Request Transport packet (ID: 0x0F)
- * Запрос адреса транспортного сервера для загрузки/скачивания файлов
- */
-class PacketRequestTransport : Packet() {
-    var transportServer: String = ""
-    
-    override fun getPacketId(): Int = 0x0F
-    
-    override fun receive(stream: Stream) {
-        transportServer = stream.readString()
-    }
-    
-    override fun send(): Stream {
-        val stream = Stream()
-        stream.writeInt16(getPacketId())
-        stream.writeString(transportServer)
-        return stream
-    }
-}

app/src/main/java/com/rosetta/messenger/network/SearchUser.kt

@@ -0,0 +1,9 @@
+package com.rosetta.messenger.network
+
+data class SearchUser(
+    val publicKey: String,
+    val title: String,
+    val username: String,
+    val verified: Int,
+    val online: Int
+)