Add distributed user profiles and username directory

README.md

@@ -13,6 +13,8 @@
 - Реализован минимальный GATT transport для обмена mesh-пакетами.
 - Есть foreground service, Room-хранилище, ACK/retry очередь и UI в стиле Telegram.
 - Реализованы главный экран со списком чатов, отдельный экран диалога, меню `три точки -> Настройки`, ручная проверка обновлений и опциональная автопроверка через `version.json`.
+- Добавлены профили пользователей: `firstName`, `lastName`, `username`, описание, локальное редактирование профиля и поиск профиля по `username`.
+- Профили распространяются как mesh-пакеты и кэшируются узлами локально; по найденному `username` можно получить `peerId`.
 - При выключенном Bluetooth приложение запрашивает его включение перед запуском mesh.
 - Публикация APK и сайта автоматизирована через `Makefile`.
 - Проект и Android-приложение приведены к имени `NNNet`, пакет приложения: `pro.nnnteam.nnnet`.
@@ -48,7 +50,7 @@
 
 4. **Data Layer**
    - локальное хранилище (Room);
-   - история сообщений и очередь исходящей доставки.
+   - история сообщений, очередь исходящей доставки и каталог профилей.
 
 5. **Security Layer**
    - идентификация пользователя;
@@ -81,9 +83,10 @@
 - [x] Добавить список чатов и базовый UI окна сообщений.
 - [x] Перенести настройки в меню `три точки` и убрать debug-лог из пользовательского интерфейса.
 - [x] Подключить Room и базовую схему хранения.
+- [x] Реализовать базовую регистрацию пользователя (локальный профиль).
+- [x] Добавить кэш профилей из mesh-сети и поиск по `username`.
 - [x] Добавить логирование сети и debug-экран маршрутов.
 - [x] Добавить ручную проверку обновлений и опциональную автопроверку клиента.
-- [ ] Реализовать базовую регистрацию пользователя (локальный профиль).
 - [ ] Добавить шифрование полезной нагрузки сообщений.
 - [ ] Написать инструментальные тесты BLE-обмена.
 - [x] Создать сайт (`index.html`, `styles.css`, `app.js`) на Bootstrap.
@@ -108,10 +111,11 @@
 Проект использует лицензию `GPL-3.0`. См. [LICENSE](/home/dom4k/nnnet/LICENSE).
 
 ## Ближайший следующий шаг
-Добавить профили пользователей, шифрование payload и инструментальные тесты BLE-обмена между несколькими устройствами.
+Добавить шифрование payload и инструментальные тесты BLE-обмена между несколькими устройствами.
 
 ## Ограничения сети
 - Выделенный хост для NNNet не нужен: сеть строится как P2P mesh между устройствами.
 - Все узлы равноправны на уровне текущей архитектуры: каждое устройство может обнаруживать соседей, принимать и ретранслировать пакеты.
 - Количество пользователей не бесконечно. Практический предел зависит от плотности устройств, качества BLE-эфира, числа одновременных соединений, частоты ретрансляции и ограничений батареи Android.
+- Каталог профилей хранится распределённо: каждый узел кэширует увиденные профильные пакеты, поэтому поиск по `username` зависит от того, успел ли профиль распространиться по mesh.
 - Для школы такая схема подходит как офлайн-сеть без интернета, но для больших нагрузок всё равно понадобятся дополнительные оптимизации маршрутизации, дедупликации и доставки.

android/app/src/main/java/pro/nnnteam/nnnet/ChatActivity.kt

@@ -47,13 +47,9 @@ class ChatActivity : AppCompatActivity() {
         override fun onReceive(context: Context?, intent: Intent?) {
             if (intent?.action != MeshServiceContract.ACTION_EVENT) return
             val eventType = intent.getStringExtra(MeshServiceContract.EXTRA_EVENT_TYPE) ?: return
-            val value = intent.getStringExtra(MeshServiceContract.EXTRA_EVENT_VALUE) ?: return
             when (eventType) {
-                MeshServiceContract.EVENT_STATUS -> subtitleText.text = value
                 MeshServiceContract.EVENT_MESSAGES_CHANGED -> refreshMessages()
-                MeshServiceContract.EVENT_PEER -> if (value == peerId) {
+                MeshServiceContract.EVENT_PROFILES_CHANGED -> refreshHeader()
-                    subtitleText.text = getString(R.string.peer_nearby)
-                }
             }
         }
     }
@@ -89,7 +85,7 @@ class ChatActivity : AppCompatActivity() {
         }
 
         val database = MeshDatabase.getInstance(applicationContext)
-        repository = MeshRepository(database.messageDao(), database.outboundQueueDao())
+        repository = MeshRepository(database.messageDao(), database.outboundQueueDao(), database.profileDao())
 
         titleText = findViewById(R.id.chatTitleText)
         subtitleText = findViewById(R.id.chatSubtitleText)
@@ -97,21 +93,20 @@ class ChatActivity : AppCompatActivity() {
         emptyStateText = findViewById(R.id.emptyStateText)
         messagesListView = findViewById(R.id.messageListView)
 
-        titleText.text = peerId
-        subtitleText.text = getString(R.string.chat_waiting_status)
-
         adapter = MessageListAdapter(this, messages)
         messagesListView.adapter = adapter
 
         findViewById<ImageButton>(R.id.backButton).setOnClickListener { finish() }
         findViewById<View>(R.id.sendButton).setOnClickListener { sendMessage() }
 
+        refreshHeader()
         refreshMessages()
     }
 
     override fun onStart() {
         super.onStart()
         registerMeshReceiver()
+        refreshHeader()
         refreshMessages()
     }
 
@@ -135,6 +130,14 @@ class ChatActivity : AppCompatActivity() {
         receiverRegistered = true
     }
 
+    private fun refreshHeader() {
+        lifecycleScope.launch {
+            val profile = repository.profileByPeerId(peerId)
+            titleText.text = profile?.displayName() ?: peerId
+            subtitleText.text = profile?.metaLine() ?: peerId
+        }
+    }
+
     private fun sendMessage() {
         val body = messageInput.text.toString().trim()
         if (body.isEmpty()) {
@@ -177,7 +180,6 @@ class ChatActivity : AppCompatActivity() {
         }
         val body = pendingBody ?: return
         MeshForegroundService.sendMessage(this, peerId, body)
-        subtitleText.text = getString(R.string.message_sending)
         messageInput.text?.clear()
         pendingBody = null
     }

android/app/src/main/java/pro/nnnteam/nnnet/MainActivity.kt

@@ -25,12 +25,12 @@ import com.google.android.material.floatingactionbutton.FloatingActionButton
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
-import pro.nnnteam.nnnet.data.ChatSummary
 import pro.nnnteam.nnnet.data.MeshDatabase
 import pro.nnnteam.nnnet.data.MeshRepository
 import pro.nnnteam.nnnet.mesh.MeshForegroundService
 import pro.nnnteam.nnnet.mesh.MeshServiceContract
 import pro.nnnteam.nnnet.ui.ChatListAdapter
+import pro.nnnteam.nnnet.ui.ChatListItem
 import pro.nnnteam.nnnet.update.UpdateInfo
 import pro.nnnteam.nnnet.update.UpdateManager
 import java.util.Locale
@@ -44,7 +44,7 @@ class MainActivity : AppCompatActivity() {
     private lateinit var chatListView: ListView
 
     private val peers = linkedSetOf<String>()
-    private val chatSummaries = mutableListOf<ChatSummary>()
+    private val chatItems = mutableListOf<ChatListItem>()
     private lateinit var chatAdapter: ChatListAdapter
 
     private var receiverRegistered = false
@@ -63,7 +63,8 @@ class MainActivity : AppCompatActivity() {
             when (eventType) {
                 MeshServiceContract.EVENT_STATUS -> updateMeshStatus(value)
                 MeshServiceContract.EVENT_PEER -> addPeer(value)
-                MeshServiceContract.EVENT_MESSAGES_CHANGED -> refreshChats()
+                MeshServiceContract.EVENT_MESSAGES_CHANGED,
+                MeshServiceContract.EVENT_PROFILES_CHANGED -> refreshChats()
             }
         }
     }
@@ -71,8 +72,7 @@ class MainActivity : AppCompatActivity() {
     private val permissionLauncher = registerForActivityResult(
         ActivityResultContracts.RequestMultiplePermissions()
     ) { result ->
-        val allGranted = result.values.all { it }
+        if (result.values.all { it }) {
-        if (allGranted) {
             ensureBluetoothEnabledAndContinue()
         } else {
             Toast.makeText(this, R.string.permissions_denied, Toast.LENGTH_SHORT).show()
@@ -94,7 +94,7 @@ class MainActivity : AppCompatActivity() {
         setContentView(R.layout.activity_main)
 
         val database = MeshDatabase.getInstance(applicationContext)
-        repository = MeshRepository(database.messageDao(), database.outboundQueueDao())
+        repository = MeshRepository(database.messageDao(), database.outboundQueueDao(), database.profileDao())
 
         deviceCountText = findViewById(R.id.deviceCountText)
         statusBadge = findViewById(R.id.statusBadge)
@@ -102,10 +102,10 @@ class MainActivity : AppCompatActivity() {
         emptyStateText = findViewById(R.id.emptyStateText)
         chatListView = findViewById(R.id.chatListView)
 
-        chatAdapter = ChatListAdapter(this, chatSummaries)
+        chatAdapter = ChatListAdapter(this, chatItems)
         chatListView.adapter = chatAdapter
         chatListView.setOnItemClickListener { _, _, position, _ ->
-            openChat(chatSummaries[position].peerId)
+            openChat(chatItems[position].peerId)
         }
 
         statusBadge.setOnClickListener { toggleMesh() }
@@ -164,7 +164,7 @@ class MainActivity : AppCompatActivity() {
 
     private fun showNewChatDialog() {
         val input = EditText(this).apply {
-            hint = getString(R.string.hint_peer_id)
+            hint = getString(R.string.hint_chat_target)
             setSingleLine()
             setPadding(48, 32, 48, 32)
         }
@@ -172,18 +172,44 @@ class MainActivity : AppCompatActivity() {
         AlertDialog.Builder(this)
             .setTitle(R.string.new_chat_title)
             .setView(input)
-            .setPositiveButton(R.string.open_chat) { _, _ ->
+            .setPositiveButton(R.string.open_chat, null)
-                val peerId = input.text.toString().trim()
-                if (peerId.isNotEmpty()) {
-                    openChat(peerId)
-                } else {
-                    Toast.makeText(this, R.string.peer_id_required, Toast.LENGTH_SHORT).show()
-                }
-            }
             .setNegativeButton(R.string.cancel, null)
+            .create()
+            .also { dialog ->
+                dialog.setOnShowListener {
+                    dialog.getButton(AlertDialog.BUTTON_POSITIVE).setOnClickListener {
+                        val value = input.text.toString().trim()
+                        if (value.isEmpty()) {
+                            Toast.makeText(this, R.string.peer_id_required, Toast.LENGTH_SHORT).show()
+                            return@setOnClickListener
+                        }
+                        lifecycleScope.launch {
+                            val resolvedPeerId = resolvePeerId(value)
+                            if (resolvedPeerId != null) {
+                                dialog.dismiss()
+                                openChat(resolvedPeerId)
+                            } else {
+                                Toast.makeText(
+                                    this@MainActivity,
+                                    R.string.profile_not_found_locally,
+                                    Toast.LENGTH_SHORT
+                                ).show()
+                            }
+                        }
+                    }
+                }
+            }
             .show()
     }
 
+    private suspend fun resolvePeerId(value: String): String? {
+        val normalized = value.trim().removePrefix("@").lowercase(Locale.getDefault())
+        return when {
+            ':' in value -> value.trim()
+            else -> repository.profileByUsername(normalized)?.peerId?.takeIf { it.isNotBlank() }
+        }
+    }
+
     private fun openChat(peerId: String) {
         startActivity(Intent(this, ChatActivity::class.java).putExtra(ChatActivity.EXTRA_PEER_ID, peerId))
     }
@@ -238,10 +264,22 @@ class MainActivity : AppCompatActivity() {
     private fun refreshChats() {
         lifecycleScope.launch {
             val chats = repository.chatSummaries()
-            chatSummaries.clear()
+            val mappedItems = chats.map { chat ->
-            chatSummaries.addAll(chats)
+                val profile = repository.profileByPeerId(chat.peerId)
+                val title = profile?.displayName() ?: chat.peerId
+                val subtitlePrefix = profile?.let { "@${it.username} · " }.orEmpty()
+                ChatListItem(
+                    peerId = chat.peerId,
+                    title = title,
+                    subtitle = subtitlePrefix + chat.lastBody,
+                    lastStatus = chat.lastStatus,
+                    lastTimestamp = chat.lastTimestamp
+                )
+            }
+            chatItems.clear()
+            chatItems.addAll(mappedItems)
             chatAdapter.notifyDataSetChanged()
-            emptyStateText.visibility = if (chats.isEmpty()) View.VISIBLE else View.GONE
+            emptyStateText.visibility = if (mappedItems.isEmpty()) View.VISIBLE else View.GONE
         }
     }
 
@@ -253,14 +291,14 @@ class MainActivity : AppCompatActivity() {
 
     private fun updateMeshStatus(status: String) {
         val normalized = status.lowercase(Locale.getDefault())
-        if (normalized.contains("останов")) {
+        if (normalized.contains("останов") || normalized.contains("оффлайн")) {
             meshEnabled = false
             peers.clear()
         } else if (
             normalized.contains("актив") ||
             normalized.contains("запуска") ||
             normalized.contains("в сети") ||
-            normalized.contains("присутствие") ||
+            normalized.contains("устройство") ||
             normalized.contains("сообщение")
         ) {
             meshEnabled = true

android/app/src/main/java/pro/nnnteam/nnnet/SettingsActivity.kt

@@ -1,33 +1,78 @@
 package pro.nnnteam.nnnet
 
-import android.content.Intent
-import android.net.Uri
 import android.os.Build
 import android.os.Bundle
+import android.widget.EditText
 import android.widget.ImageButton
 import android.widget.TextView
 import android.widget.Toast
-import androidx.appcompat.app.AlertDialog
 import androidx.appcompat.app.AppCompatActivity
 import androidx.lifecycle.lifecycleScope
+import com.google.android.material.button.MaterialButton
 import com.google.android.material.switchmaterial.SwitchMaterial
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
+import pro.nnnteam.nnnet.data.MeshDatabase
+import pro.nnnteam.nnnet.data.MeshRepository
+import pro.nnnteam.nnnet.data.ProfileEntity
+import pro.nnnteam.nnnet.mesh.MeshServiceContract
 import pro.nnnteam.nnnet.update.UpdateInfo
 import pro.nnnteam.nnnet.update.UpdateManager
+import android.content.BroadcastReceiver
+import android.content.Intent
+import android.content.IntentFilter
 
 class SettingsActivity : AppCompatActivity() {
+    private lateinit var repository: MeshRepository
+    private lateinit var firstNameInput: EditText
+    private lateinit var lastNameInput: EditText
+    private lateinit var usernameInput: EditText
+    private lateinit var descriptionInput: EditText
+    private lateinit var searchInput: EditText
+    private lateinit var profileResultCard: android.view.View
+    private lateinit var resultNameText: TextView
+    private lateinit var resultUsernameText: TextView
+    private lateinit var resultDescriptionText: TextView
+    private lateinit var resultPeerIdText: TextView
+
+    private var receiverRegistered = false
+
     private val prefs by lazy {
         getSharedPreferences(UpdateManager.PREFS_NAME, MODE_PRIVATE)
     }
 
+    private val meshEventReceiver = object : BroadcastReceiver() {
+        override fun onReceive(context: android.content.Context?, intent: Intent?) {
+            if (intent?.action != MeshServiceContract.ACTION_EVENT) return
+            val eventType = intent.getStringExtra(MeshServiceContract.EXTRA_EVENT_TYPE) ?: return
+            if (eventType == MeshServiceContract.EVENT_PROFILES_CHANGED) {
+                val query = searchInput.text.toString().trim()
+                if (query.isNotEmpty()) {
+                    lookupProfile(query)
+                }
+            }
+        }
+    }
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_settings)
 
+        val database = MeshDatabase.getInstance(applicationContext)
+        repository = MeshRepository(database.messageDao(), database.outboundQueueDao(), database.profileDao())
+
         findViewById<ImageButton>(R.id.backButton).setOnClickListener { finish() }
 
+        firstNameInput = findViewById(R.id.firstNameInput)
+        lastNameInput = findViewById(R.id.lastNameInput)
+        usernameInput = findViewById(R.id.usernameInput)
+        descriptionInput = findViewById(R.id.descriptionInput)
+        searchInput = findViewById(R.id.searchInput)
+        profileResultCard = findViewById(R.id.profileResultCard)
+        resultNameText = findViewById(R.id.resultNameText)
+        resultUsernameText = findViewById(R.id.resultUsernameText)
+        resultDescriptionText = findViewById(R.id.resultDescriptionText)
+        resultPeerIdText = findViewById(R.id.resultPeerIdText)
+
         val autoUpdateSwitch = findViewById<SwitchMaterial>(R.id.autoUpdateSwitch)
         val versionText = findViewById<TextView>(R.id.versionText)
         autoUpdateSwitch.isChecked = prefs.getBoolean(UpdateManager.KEY_AUTO_UPDATE, false)
@@ -41,14 +86,108 @@ class SettingsActivity : AppCompatActivity() {
             currentVersionCode()
         )
 
-        findViewById<android.view.View>(R.id.checkUpdatesButton).setOnClickListener {
+        findViewById<MaterialButton>(R.id.saveProfileButton).setOnClickListener { saveProfile() }
-            checkForUpdates()
+        findViewById<MaterialButton>(R.id.searchButton).setOnClickListener {
+            val query = searchInput.text.toString().trim()
+            if (query.isEmpty()) {
+                Toast.makeText(this, R.string.enter_username_to_search, Toast.LENGTH_SHORT).show()
+            } else {
+                lookupProfile(query)
+            }
+        }
+        findViewById<MaterialButton>(R.id.checkUpdatesButton).setOnClickListener { checkForUpdates() }
+
+        loadLocalProfile()
+    }
+
+    override fun onStart() {
+        super.onStart()
+        registerMeshReceiver()
+    }
+
+    override fun onStop() {
+        if (receiverRegistered) {
+            unregisterReceiver(meshEventReceiver)
+            receiverRegistered = false
+        }
+        super.onStop()
+    }
+
+    private fun registerMeshReceiver() {
+        if (receiverRegistered) return
+        val filter = IntentFilter(MeshServiceContract.ACTION_EVENT)
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            registerReceiver(meshEventReceiver, filter, RECEIVER_NOT_EXPORTED)
+        } else {
+            @Suppress("DEPRECATION")
+            registerReceiver(meshEventReceiver, filter)
+        }
+        receiverRegistered = true
+    }
+
+    private fun loadLocalProfile() {
+        lifecycleScope.launch {
+            val localProfile = repository.localProfile()
+            if (localProfile != null) {
+                firstNameInput.setText(localProfile.firstName)
+                lastNameInput.setText(localProfile.lastName)
+                usernameInput.setText(localProfile.username)
+                descriptionInput.setText(localProfile.description)
+            }
+        }
+    }
+
+    private fun saveProfile() {
+        val firstName = firstNameInput.text.toString().trim()
+        val lastName = lastNameInput.text.toString().trim()
+        val username = usernameInput.text.toString().trim().removePrefix("@")
+        val description = descriptionInput.text.toString().trim()
+
+        if (username.isBlank()) {
+            Toast.makeText(this, R.string.username_required, Toast.LENGTH_SHORT).show()
+            return
+        }
+
+        lifecycleScope.launch {
+            repository.saveLocalProfile(
+                firstName = firstName,
+                lastName = lastName,
+                username = username,
+                description = description
+            )
+            Toast.makeText(this@SettingsActivity, R.string.profile_saved, Toast.LENGTH_SHORT).show()
+        }
+    }
+
+    private fun lookupProfile(username: String) {
+        lifecycleScope.launch {
+            val profile = repository.profileByUsername(username.removePrefix("@"))
+            renderSearchResult(profile)
+            if (profile == null) {
+                Toast.makeText(this@SettingsActivity, R.string.profile_not_found_locally, Toast.LENGTH_SHORT).show()
+            }
+        }
+    }
+
+    private fun renderSearchResult(profile: ProfileEntity?) {
+        if (profile == null) {
+            profileResultCard.visibility = android.view.View.GONE
+            return
+        }
+        profileResultCard.visibility = android.view.View.VISIBLE
+        resultNameText.text = profile.displayName()
+        resultUsernameText.text = "@${profile.username}"
+        resultDescriptionText.text = profile.description.ifBlank { getString(R.string.no_profile_description) }
+        resultPeerIdText.text = if (profile.peerId.isBlank()) {
+            getString(R.string.peer_id_unknown)
+        } else {
+            getString(R.string.peer_id_value, profile.peerId)
         }
     }
 
     private fun checkForUpdates() {
         lifecycleScope.launch {
-            val updateInfo = withContext(Dispatchers.IO) { UpdateManager.fetchUpdateInfo() }
+            val updateInfo = kotlinx.coroutines.withContext(kotlinx.coroutines.Dispatchers.IO) { UpdateManager.fetchUpdateInfo() }
             if (updateInfo == null) {
                 Toast.makeText(this@SettingsActivity, R.string.update_check_failed, Toast.LENGTH_SHORT).show()
                 return@launch
@@ -63,10 +202,10 @@ class SettingsActivity : AppCompatActivity() {
 
     private fun showUpdateDialog(updateInfo: UpdateInfo) {
         lifecycleScope.launch {
-            val releaseNotes = withContext(Dispatchers.IO) {
+            val releaseNotes = kotlinx.coroutines.withContext(kotlinx.coroutines.Dispatchers.IO) {
                 UpdateManager.fetchReleaseNotes(updateInfo.releaseNotesPath)
             }
-            AlertDialog.Builder(this@SettingsActivity)
+            androidx.appcompat.app.AlertDialog.Builder(this@SettingsActivity)
                 .setTitle(updateInfo.releaseNotesTitle)
                 .setMessage(
                     buildString {
@@ -79,7 +218,7 @@ class SettingsActivity : AppCompatActivity() {
                 )
                 .setPositiveButton(R.string.download_update) { _, _ ->
                     val url = UpdateManager.buildDownloadUrl(updateInfo.apkPath)
-                    startActivity(Intent(Intent.ACTION_VIEW, Uri.parse(url)))
+                    startActivity(Intent(Intent.ACTION_VIEW, android.net.Uri.parse(url)))
                 }
                 .setNegativeButton(R.string.later, null)
                 .show()

android/app/src/main/java/pro/nnnteam/nnnet/data/MeshDatabase.kt

@@ -6,13 +6,14 @@ import androidx.room.Room
 import androidx.room.RoomDatabase
 
 @Database(
-    entities = [MessageEntity::class, OutboundQueueEntity::class],
+    entities = [MessageEntity::class, OutboundQueueEntity::class, ProfileEntity::class],
-    version = 1,
+    version = 2,
     exportSchema = false
 )
 abstract class MeshDatabase : RoomDatabase() {
     abstract fun messageDao(): MessageDao
     abstract fun outboundQueueDao(): OutboundQueueDao
+    abstract fun profileDao(): ProfileDao
 
     companion object {
         @Volatile
@@ -24,7 +25,10 @@ abstract class MeshDatabase : RoomDatabase() {
                     context.applicationContext,
                     MeshDatabase::class.java,
                     "mesh.db"
-                ).build().also { instance = it }
+                )
+                    .fallbackToDestructiveMigration()
+                    .build()
+                    .also { instance = it }
             }
         }
     }

android/app/src/main/java/pro/nnnteam/nnnet/data/MeshRepository.kt

@@ -6,7 +6,8 @@ import java.util.UUID
 
 class MeshRepository(
     private val messageDao: MessageDao,
-    private val queueDao: OutboundQueueDao
+    private val queueDao: OutboundQueueDao,
+    private val profileDao: ProfileDao
 ) {
     suspend fun enqueueOutgoingMessage(
         senderId: String,
@@ -97,8 +98,92 @@ class MeshRepository(
         return messageDao.messagesForPeer(peerId, limit)
     }
 
+    suspend fun saveLocalProfile(
+        firstName: String,
+        lastName: String,
+        username: String,
+        description: String,
+        peerId: String = "",
+        now: Long = System.currentTimeMillis()
+    ): ProfileEntity {
+        val normalizedUsername = normalizeUsername(username)
+        profileDao.deleteLocalProfiles()
+        val entity = ProfileEntity(
+            username = normalizedUsername,
+            firstName = firstName.trim(),
+            lastName = lastName.trim(),
+            description = description.trim(),
+            peerId = peerId,
+            updatedAt = now,
+            lastSeenAt = now,
+            isLocal = true
+        )
+        profileDao.upsert(entity)
+        return entity
+    }
+
+    suspend fun localProfile(): ProfileEntity? = profileDao.localProfile()
+
+    suspend fun updateLocalProfilePeerId(peerId: String, now: Long = System.currentTimeMillis()) {
+        if (peerId.isBlank()) return
+        profileDao.updateLocalPeerId(peerId, now, now)
+    }
+
+    suspend fun upsertRemoteProfile(
+        payload: ProfilePayload,
+        peerId: String,
+        now: Long = System.currentTimeMillis()
+    ): ProfileEntity? {
+        val normalizedUsername = normalizeUsername(payload.username)
+        if (normalizedUsername.isBlank()) return null
+        val localProfile = profileDao.localProfile()
+        if (localProfile?.username == normalizedUsername) {
+            return localProfile
+        }
+
+        val existing = profileDao.findByUsername(normalizedUsername)
+        val entity = ProfileEntity(
+            username = normalizedUsername,
+            firstName = payload.firstName.trim(),
+            lastName = payload.lastName.trim(),
+            description = payload.description.trim(),
+            peerId = peerId,
+            updatedAt = maxOf(payload.updatedAt, existing?.updatedAt ?: 0L),
+            lastSeenAt = now,
+            isLocal = false
+        )
+        profileDao.upsert(entity)
+        return entity
+    }
+
+    suspend fun profileByUsername(username: String): ProfileEntity? {
+        return profileDao.findByUsername(normalizeUsername(username))
+    }
+
+    suspend fun profileByPeerId(peerId: String): ProfileEntity? {
+        if (peerId.isBlank()) return null
+        return profileDao.findByPeerId(peerId)
+    }
+
+    suspend fun searchProfiles(query: String, limit: Int = 20): List<ProfileEntity> {
+        val trimmed = query.trim()
+        if (trimmed.isBlank()) return emptyList()
+        val exact = profileByUsername(trimmed)
+        val fuzzy = profileDao.search("%$trimmed%", limit)
+        return buildList {
+            if (exact != null) add(exact)
+            fuzzy.forEach { candidate ->
+                if (none { it.username == candidate.username }) {
+                    add(candidate)
+                }
+            }
+        }
+    }
+
     suspend fun queuedCount(): Int = queueDao.count()
 
+    private fun normalizeUsername(value: String): String = value.trim().lowercase()
+
     companion object {
         const val STATUS_QUEUED = "queued"
         const val STATUS_SENT = "sent"

android/app/src/main/java/pro/nnnteam/nnnet/data/ProfileDao.kt

@@ -0,0 +1,37 @@
+package pro.nnnteam.nnnet.data
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.OnConflictStrategy
+import androidx.room.Query
+
+@Dao
+interface ProfileDao {
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun upsert(profile: ProfileEntity)
+
+    @Query("SELECT * FROM profiles WHERE isLocal = 1 LIMIT 1")
+    suspend fun localProfile(): ProfileEntity?
+
+    @Query("DELETE FROM profiles WHERE isLocal = 1")
+    suspend fun deleteLocalProfiles()
+
+    @Query("SELECT * FROM profiles WHERE username = :username LIMIT 1")
+    suspend fun findByUsername(username: String): ProfileEntity?
+
+    @Query("SELECT * FROM profiles WHERE peerId = :peerId ORDER BY isLocal DESC, updatedAt DESC LIMIT 1")
+    suspend fun findByPeerId(peerId: String): ProfileEntity?
+
+    @Query(
+        """
+        SELECT * FROM profiles
+        WHERE username LIKE :query OR firstName LIKE :query OR lastName LIKE :query
+        ORDER BY isLocal DESC, updatedAt DESC
+        LIMIT :limit
+        """
+    )
+    suspend fun search(query: String, limit: Int): List<ProfileEntity>
+
+    @Query("UPDATE profiles SET peerId = :peerId, updatedAt = :updatedAt, lastSeenAt = :lastSeenAt WHERE isLocal = 1")
+    suspend fun updateLocalPeerId(peerId: String, updatedAt: Long, lastSeenAt: Long)
+}

android/app/src/main/java/pro/nnnteam/nnnet/data/ProfileEntity.kt

@@ -0,0 +1,32 @@
+package pro.nnnteam.nnnet.data
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity(tableName = "profiles")
+data class ProfileEntity(
+    @PrimaryKey val username: String,
+    val firstName: String,
+    val lastName: String,
+    val description: String,
+    val peerId: String,
+    val updatedAt: Long,
+    val lastSeenAt: Long,
+    val isLocal: Boolean
+) {
+    fun displayName(): String {
+        val fullName = listOf(firstName, lastName)
+            .map { it.trim() }
+            .filter { it.isNotEmpty() }
+            .joinToString(" ")
+        return fullName.ifBlank { "@$username" }
+    }
+
+    fun metaLine(): String {
+        return if (peerId.isBlank()) {
+            "@$username"
+        } else {
+            "@$username · $peerId"
+        }
+    }
+}

android/app/src/main/java/pro/nnnteam/nnnet/data/ProfilePayload.kt

@@ -0,0 +1,36 @@
+package pro.nnnteam.nnnet.data
+
+import org.json.JSONObject
+
+data class ProfilePayload(
+    val firstName: String,
+    val lastName: String,
+    val username: String,
+    val description: String,
+    val updatedAt: Long
+) {
+    fun normalizedUsername(): String = username.trim().lowercase()
+}
+
+object ProfilePayloadCodec {
+    fun encode(payload: ProfilePayload): String {
+        return JSONObject()
+            .put("firstName", payload.firstName)
+            .put("lastName", payload.lastName)
+            .put("username", payload.username)
+            .put("description", payload.description)
+            .put("updatedAt", payload.updatedAt)
+            .toString()
+    }
+
+    fun decode(raw: String): ProfilePayload {
+        val json = JSONObject(raw)
+        return ProfilePayload(
+            firstName = json.optString("firstName", "").trim(),
+            lastName = json.optString("lastName", "").trim(),
+            username = json.getString("username").trim(),
+            description = json.optString("description", "").trim(),
+            updatedAt = json.optLong("updatedAt", System.currentTimeMillis())
+        )
+    }
+}

android/app/src/main/java/pro/nnnteam/nnnet/mesh/BleMeshManager.kt

@@ -7,11 +7,12 @@ import android.bluetooth.BluetoothDevice
 import android.bluetooth.BluetoothGatt
 import android.bluetooth.BluetoothGattCallback
 import android.bluetooth.BluetoothGattCharacteristic
-import android.bluetooth.BluetoothProfile
 import android.bluetooth.BluetoothGattServer
 import android.bluetooth.BluetoothGattServerCallback
 import android.bluetooth.BluetoothGattService
 import android.bluetooth.BluetoothManager
+import android.bluetooth.BluetoothProfile
+import android.bluetooth.BluetoothStatusCodes
 import android.bluetooth.le.AdvertiseCallback
 import android.bluetooth.le.AdvertiseData
 import android.bluetooth.le.AdvertiseSettings
@@ -21,7 +22,6 @@ import android.bluetooth.le.ScanCallback
 import android.bluetooth.le.ScanFilter
 import android.bluetooth.le.ScanResult
 import android.bluetooth.le.ScanSettings
-import android.bluetooth.BluetoothStatusCodes
 import android.content.Context
 import android.content.pm.PackageManager
 import android.os.Build
@@ -38,6 +38,7 @@ class BleMeshManager(
     private val onStatusChanged: (String) -> Unit = {},
     private val onAckReceived: (String) -> Unit = {},
     private val onMessageReceived: (MeshPacket) -> Unit = {},
+    private val onProfileReceived: (MeshPacket) -> Unit = {},
     private val onError: (String) -> Unit = {},
     private val onLog: (String) -> Unit = {},
     private val seenPacketCache: SeenPacketCache = SeenPacketCache()
@@ -110,7 +111,7 @@ class BleMeshManager(
             }
 
             val rawPacket = value.toString(StandardCharsets.UTF_8)
-            log("Packet received from ${device.address}: $rawPacket")
+            log("Пакет получен от ${device.address}: $rawPacket")
             handleIncomingPacket(rawPacket)
 
             if (responseNeeded) {
@@ -125,20 +126,20 @@ class BleMeshManager(
         override fun onConnectionStateChange(gatt: BluetoothGatt, status: Int, newState: Int) {
             val address = device.address ?: return
             if (status != BluetoothGatt.GATT_SUCCESS) {
-                log("GATT client error for $address: status=$status")
+                log("Ошибка GATT-клиента для $address: status=$status")
                 closeConnection(address)
                 return
             }
 
             when (newState) {
                 BluetoothProfile.STATE_CONNECTED -> {
-                    log("Connected to peer $address")
+                    log("Подключено к узлу $address")
                     activeConnections[address] = gatt
                     gatt.discoverServices()
                 }
 
                 BluetoothProfile.STATE_DISCONNECTED -> {
-                    log("Disconnected from peer $address")
+                    log("Узел отключился: $address")
                     closeConnection(address)
                 }
             }
@@ -146,11 +147,12 @@ class BleMeshManager(
 
         override fun onServicesDiscovered(gatt: BluetoothGatt, status: Int) {
             if (status != BluetoothGatt.GATT_SUCCESS) {
-                log("Service discovery failed for ${device.address}: $status")
+                log("Не удалось обнаружить сервисы у ${device.address}: $status")
                 return
             }
-            log("Services discovered for ${device.address}")
+            log("Сервисы обнаружены у ${device.address}")
             sendPresence(gatt)
+            device.address?.let(onPeerDiscovered)
         }
 
         override fun onCharacteristicWrite(
@@ -160,9 +162,9 @@ class BleMeshManager(
         ) {
             val address = device.address ?: return
             if (status == BluetoothGatt.GATT_SUCCESS) {
-                log("Packet sent to $address")
+                log("Пакет отправлен на $address")
             } else {
-                log("Packet send failed to $address: status=$status")
+                log("Ошибка отправки пакета на $address: status=$status")
             }
         }
     }
@@ -178,9 +180,24 @@ class BleMeshManager(
         }
 
         return when (packet.type) {
-            PacketType.ACK -> MeshAction.ConsumeAck(packet.payload)
+            PacketType.ACK -> {
+                if (packet.targetId == localNodeId) {
+                    MeshAction.ConsumeAck(packet.payload)
+                } else {
+                    MeshAction.Relay(packet.decrementedTtl())
+                }
+            }
+
             PacketType.PRESENCE -> MeshAction.ConsumePresence(packet.senderId)
-            PacketType.MESSAGE -> MeshAction.ProcessAndRelay(packet.decrementedTtl())
+            PacketType.MESSAGE -> {
+                if (packet.targetId == localNodeId) {
+                    MeshAction.DeliverMessage(packet)
+                } else {
+                    MeshAction.Relay(packet.decrementedTtl())
+                }
+            }
+
+            PacketType.PROFILE -> MeshAction.CacheProfile(packet, packet.decrementedTtl())
         }
     }
 
@@ -242,14 +259,25 @@ class BleMeshManager(
                 onStatusChanged("Устройство ${action.senderId} рядом")
                 log("Сигнал присутствия обработан от ${action.senderId}")
             }
-
+            is MeshAction.DeliverMessage -> {
-            is MeshAction.ProcessAndRelay -> {
+                onMessageReceived(action.packet)
-                onMessageReceived(packet)
+                onStatusChanged("Новое сообщение от ${action.packet.senderId}")
-                onStatusChanged("Новое сообщение от ${packet.senderId}")
+                sendAck(action.packet)
-                log("Ретрансляция пакета ${packet.messageId}")
-                broadcastPacket(action.packetToRelay)
-                sendAck(packet)
             }
+            is MeshAction.CacheProfile -> {
+                onProfileReceived(action.packet)
+                broadcastIfAlive(action.packetToRelay)
+            }
+            is MeshAction.Relay -> {
+                log("Ретрансляция пакета ${action.packetToRelay.messageId}")
+                broadcastIfAlive(action.packetToRelay)
+            }
+        }
+    }
+
+    private fun broadcastIfAlive(packet: MeshPacket) {
+        if (!packet.isExpired()) {
+            broadcastPacket(packet)
         }
     }
 
@@ -262,7 +290,7 @@ class BleMeshManager(
 
         val server = manager.openGattServer(context, gattServerCallback)
         if (server == null) {
-            fail("Failed to open GATT server")
+            fail("Не удалось открыть GATT server")
             return
         }
 
@@ -318,7 +346,7 @@ class BleMeshManager(
     private fun connectToPeer(device: BluetoothDevice) {
         val address = device.address ?: return
         if (activeConnections.containsKey(address)) return
-        log("Connecting to peer $address")
+        log("Подключение к узлу $address")
         val gatt = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             device.connectGatt(context, false, MeshGattCallback(device), BluetoothDevice.TRANSPORT_LE)
         } else {
@@ -333,7 +361,7 @@ class BleMeshManager(
     private fun sendPresence(gatt: BluetoothGatt) {
         val packet = MeshPacket(
             senderId = localNodeId,
-            targetId = gatt.device.address ?: "broadcast",
+            targetId = gatt.device.address ?: BROADCAST_TARGET,
             type = PacketType.PRESENCE,
             payload = "presence:$localNodeId"
         )
@@ -374,7 +402,7 @@ class BleMeshManager(
             ?.getCharacteristic(CHARACTERISTIC_PACKET_UUID)
 
         if (characteristic == null) {
-            log("Remote characteristic missing on ${gatt.device.address}")
+            log("У удалённого узла нет mesh-характеристики: ${gatt.device.address}")
             return false
         }
 
@@ -435,6 +463,7 @@ class BleMeshManager(
     }
 
     companion object {
+        const val BROADCAST_TARGET = "*"
         private const val TAG = "BleMeshManager"
         private val MESH_SERVICE_UUID: UUID = UUID.fromString("8fa8f9f0-e755-4c1d-9ac2-4f0a02e07f8b")
         private val CHARACTERISTIC_PACKET_UUID: UUID =
@@ -447,5 +476,7 @@ sealed interface MeshAction {
     data object DropExpired : MeshAction
     data class ConsumeAck(val messageId: String) : MeshAction
     data class ConsumePresence(val senderId: String) : MeshAction
-    data class ProcessAndRelay(val packetToRelay: MeshPacket) : MeshAction
+    data class DeliverMessage(val packet: MeshPacket) : MeshAction
+    data class CacheProfile(val packet: MeshPacket, val packetToRelay: MeshPacket) : MeshAction
+    data class Relay(val packetToRelay: MeshPacket) : MeshAction
 }

android/app/src/main/java/pro/nnnteam/nnnet/mesh/MeshForegroundService.kt

@@ -9,32 +9,38 @@ import android.content.Intent
 import android.os.Build
 import android.os.IBinder
 import androidx.core.app.NotificationCompat
-import pro.nnnteam.nnnet.R
-import pro.nnnteam.nnnet.data.MeshDatabase
-import pro.nnnteam.nnnet.data.MeshRepository
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.SupervisorJob
 import kotlinx.coroutines.cancel
 import kotlinx.coroutines.launch
+import pro.nnnteam.nnnet.R
+import pro.nnnteam.nnnet.data.MeshDatabase
+import pro.nnnteam.nnnet.data.MeshRepository
+import pro.nnnteam.nnnet.data.ProfilePayload
+import pro.nnnteam.nnnet.data.ProfilePayloadCodec
 
 class MeshForegroundService : Service() {
     private val serviceScope = CoroutineScope(SupervisorJob() + Dispatchers.IO)
     private lateinit var bleMeshManager: BleMeshManager
     private lateinit var repository: MeshRepository
     private lateinit var queueProcessor: MeshQueueProcessor
+    private var lastProfileBroadcastAt = 0L
 
     override fun onCreate() {
         super.onCreate()
         createNotificationChannel()
         val database = MeshDatabase.getInstance(applicationContext)
-        repository = MeshRepository(database.messageDao(), database.outboundQueueDao())
+        repository = MeshRepository(database.messageDao(), database.outboundQueueDao(), database.profileDao())
         bleMeshManager = BleMeshManager(
             context = applicationContext,
             onPeerDiscovered = { address ->
                 sendEvent(MeshServiceContract.EVENT_PEER, address)
                 sendEvent(MeshServiceContract.EVENT_LOG, "Устройство обнаружено: $address")
                 queueProcessor.poke()
+                serviceScope.launch {
+                    publishLocalProfile(force = false)
+                }
             },
             onStatusChanged = { status ->
                 sendEvent(MeshServiceContract.EVENT_STATUS, status)
@@ -54,6 +60,16 @@ class MeshForegroundService : Service() {
                     sendEvent(MeshServiceContract.EVENT_MESSAGES_CHANGED, packet.messageId)
                 }
             },
+            onProfileReceived = { packet ->
+                serviceScope.launch {
+                    val payload = runCatching { ProfilePayloadCodec.decode(packet.payload) }.getOrNull() ?: return@launch
+                    val stored = repository.upsertRemoteProfile(payload, packet.senderId)
+                    if (stored != null) {
+                        sendEvent(MeshServiceContract.EVENT_LOG, "Профиль обновлён: @${stored.username}")
+                        sendEvent(MeshServiceContract.EVENT_PROFILES_CHANGED, stored.username)
+                    }
+                }
+            },
             onError = { message ->
                 sendEvent(MeshServiceContract.EVENT_STATUS, "Ошибка: $message")
                 sendEvent(MeshServiceContract.EVENT_LOG, "Ошибка: $message")
@@ -94,6 +110,41 @@ class MeshForegroundService : Service() {
         bleMeshManager.start()
         queueProcessor.start()
         queueProcessor.poke()
+        serviceScope.launch {
+            repository.updateLocalProfilePeerId(bleMeshManager.nodeId)
+            publishLocalProfile(force = true)
+        }
+    }
+
+    private suspend fun publishLocalProfile(force: Boolean) {
+        val now = System.currentTimeMillis()
+        if (!force && now - lastProfileBroadcastAt < PROFILE_BROADCAST_THROTTLE_MS) {
+            return
+        }
+
+        repository.updateLocalProfilePeerId(bleMeshManager.nodeId)
+        val localProfile = repository.localProfile() ?: return
+        val payload = ProfilePayload(
+            firstName = localProfile.firstName,
+            lastName = localProfile.lastName,
+            username = localProfile.username,
+            description = localProfile.description,
+            updatedAt = localProfile.updatedAt
+        )
+        val sent = bleMeshManager.sendPacket(
+            MeshPacket(
+                senderId = bleMeshManager.nodeId,
+                targetId = BleMeshManager.BROADCAST_TARGET,
+                type = PacketType.PROFILE,
+                payload = ProfilePayloadCodec.encode(payload)
+            )
+        )
+        if (sent) {
+            lastProfileBroadcastAt = now
+        }
+        if (sent || force) {
+            sendEvent(MeshServiceContract.EVENT_PROFILES_CHANGED, localProfile.username)
+        }
     }
 
     private fun stopMesh() {
@@ -160,6 +211,7 @@ class MeshForegroundService : Service() {
     companion object {
         private const val CHANNEL_ID = "mesh_status"
         private const val NOTIFICATION_ID = 1001
+        private const val PROFILE_BROADCAST_THROTTLE_MS = 5_000L
 
         fun start(context: Context) {
             val intent = Intent(context, MeshForegroundService::class.java).apply {

android/app/src/main/java/pro/nnnteam/nnnet/mesh/MeshServiceContract.kt

@@ -15,4 +15,5 @@ object MeshServiceContract {
     const val EVENT_PEER = "peer"
     const val EVENT_LOG = "log"
     const val EVENT_MESSAGES_CHANGED = "messages_changed"
+    const val EVENT_PROFILES_CHANGED = "profiles_changed"
 }

android/app/src/main/java/pro/nnnteam/nnnet/mesh/PacketType.kt

@@ -3,5 +3,6 @@ package pro.nnnteam.nnnet.mesh
 enum class PacketType {
     MESSAGE,
     ACK,
-    PRESENCE
+    PRESENCE,
+    PROFILE
 }

android/app/src/main/java/pro/nnnteam/nnnet/ui/ChatListAdapter.kt

@@ -7,21 +7,20 @@ import android.view.ViewGroup
 import android.widget.BaseAdapter
 import android.widget.TextView
 import pro.nnnteam.nnnet.R
-import pro.nnnteam.nnnet.data.ChatSummary
 import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
 
 class ChatListAdapter(
     context: Context,
-    private val items: MutableList<ChatSummary>
+    private val items: MutableList<ChatListItem>
 ) : BaseAdapter() {
     private val inflater = LayoutInflater.from(context)
     private val timeFormatter = SimpleDateFormat("HH:mm", Locale("ru"))
 
     override fun getCount(): Int = items.size
 
-    override fun getItem(position: Int): ChatSummary = items[position]
+    override fun getItem(position: Int): ChatListItem = items[position]
 
     override fun getItemId(position: Int): Long = position.toLong()
 
@@ -29,16 +28,16 @@ class ChatListAdapter(
         val view = convertView ?: inflater.inflate(R.layout.item_chat_summary, parent, false)
         val item = getItem(position)
 
-        view.findViewById<TextView>(R.id.avatarText).text = avatarLetter(item.peerId)
+        view.findViewById<TextView>(R.id.avatarText).text = avatarLetter(item.title)
-        view.findViewById<TextView>(R.id.chatNameText).text = item.peerId
+        view.findViewById<TextView>(R.id.chatNameText).text = item.title
-        view.findViewById<TextView>(R.id.chatPreviewText).text = item.lastBody
+        view.findViewById<TextView>(R.id.chatPreviewText).text = item.subtitle
         view.findViewById<TextView>(R.id.chatTimeText).text = timeFormatter.format(Date(item.lastTimestamp))
         view.findViewById<TextView>(R.id.chatStatusText).text = statusLabel(item.lastStatus)
 
         return view
     }
 
-    private fun avatarLetter(peerId: String): String = peerId.firstOrNull()?.uppercase() ?: "N"
+    private fun avatarLetter(title: String): String = title.firstOrNull()?.uppercase() ?: "N"
 
     private fun statusLabel(status: String): String = when (status) {
         "queued" -> "В очереди"

android/app/src/main/java/pro/nnnteam/nnnet/ui/ChatListItem.kt

@@ -0,0 +1,9 @@
+package pro.nnnteam.nnnet.ui
+
+data class ChatListItem(
+    val peerId: String,
+    val title: String,
+    val subtitle: String,
+    val lastStatus: String,
+    val lastTimestamp: Long
+)

android/app/src/main/res/layout/activity_settings.xml

@@ -35,16 +35,156 @@
             android:textStyle="bold" />
     </LinearLayout>
 
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent">
+
         <LinearLayout
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:orientation="vertical"
             android:padding="16dp">
 
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="@string/profile_section_title"
+                android:textColor="@color/primary_text"
+                android:textSize="18sp"
+                android:textStyle="bold" />
+
+            <EditText
+                android:id="@+id/firstNameInput"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:background="@drawable/bg_settings_card"
+                android:hint="@string/first_name"
+                android:padding="16dp"
+                android:textColor="@color/primary_text"
+                android:textColorHint="@color/secondary_text" />
+
+            <EditText
+                android:id="@+id/lastNameInput"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:background="@drawable/bg_settings_card"
+                android:hint="@string/last_name"
+                android:padding="16dp"
+                android:textColor="@color/primary_text"
+                android:textColorHint="@color/secondary_text" />
+
+            <EditText
+                android:id="@+id/usernameInput"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:background="@drawable/bg_settings_card"
+                android:hint="@string/username"
+                android:inputType="textNoSuggestions"
+                android:padding="16dp"
+                android:textColor="@color/primary_text"
+                android:textColorHint="@color/secondary_text" />
+
+            <EditText
+                android:id="@+id/descriptionInput"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:background="@drawable/bg_settings_card"
+                android:gravity="top"
+                android:hint="@string/profile_description"
+                android:minLines="3"
+                android:padding="16dp"
+                android:textColor="@color/primary_text"
+                android:textColorHint="@color/secondary_text" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/saveProfileButton"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:text="@string/save_profile"
+                app:cornerRadius="18dp" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="24dp"
+                android:text="@string/search_profile_title"
+                android:textColor="@color/primary_text"
+                android:textSize="18sp"
+                android:textStyle="bold" />
+
+            <EditText
+                android:id="@+id/searchInput"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:background="@drawable/bg_settings_card"
+                android:hint="@string/search_username"
+                android:inputType="textNoSuggestions"
+                android:padding="16dp"
+                android:textColor="@color/primary_text"
+                android:textColorHint="@color/secondary_text" />
+
+            <com.google.android.material.button.MaterialButton
+                android:id="@+id/searchButton"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:text="@string/find_profile"
+                app:cornerRadius="18dp" />
+
+            <LinearLayout
+                android:id="@+id/profileResultCard"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginTop="12dp"
+                android:background="@drawable/bg_settings_card"
+                android:orientation="vertical"
+                android:padding="16dp"
+                android:visibility="gone">
+
+                <TextView
+                    android:id="@+id/resultNameText"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:textColor="@color/primary_text"
+                    android:textSize="17sp"
+                    android:textStyle="bold" />
+
+                <TextView
+                    android:id="@+id/resultUsernameText"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="4dp"
+                    android:textColor="@color/accent_blue"
+                    android:textSize="14sp" />
+
+                <TextView
+                    android:id="@+id/resultDescriptionText"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:textColor="@color/secondary_text"
+                    android:textSize="14sp" />
+
+                <TextView
+                    android:id="@+id/resultPeerIdText"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="8dp"
+                    android:textColor="@color/primary_text"
+                    android:textSize="13sp" />
+            </LinearLayout>
+
             <TextView
                 android:id="@+id/versionText"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
+                android:layout_marginTop="24dp"
                 android:background="@drawable/bg_settings_card"
                 android:padding="16dp"
                 android:textColor="@color/primary_text"
@@ -69,4 +209,5 @@
                 android:text="@string/check_updates"
                 app:cornerRadius="18dp" />
         </LinearLayout>
+    </ScrollView>
 </LinearLayout>

android/app/src/main/res/values/strings.xml

@@ -12,12 +12,14 @@
     <string name="new_chat">Новый чат</string>
     <string name="new_chat_title">Новый диалог</string>
     <string name="hint_peer_id">Идентификатор устройства</string>
+    <string name="hint_chat_target">Username или peerId</string>
     <string name="open_chat">Открыть чат</string>
     <string name="cancel">Отмена</string>
     <string name="permissions_denied">Без разрешений BLE сеть не запустится</string>
     <string name="bluetooth_required">Для работы нужен включённый Bluetooth</string>
     <string name="bluetooth_unavailable">Bluetooth на устройстве недоступен</string>
     <string name="peer_id_required">Введите ID устройства</string>
+    <string name="profile_not_found_locally">Профиль не найден в локальном каталоге сети</string>
     <string name="update_check_failed">Не удалось проверить обновления</string>
     <string name="latest_version_installed">У вас уже установлена последняя версия</string>
     <string name="update_available_message">Доступна версия %1$s.</string>
@@ -34,4 +36,19 @@
     <string name="auto_update">Автоматически проверять обновления</string>
     <string name="check_updates">Проверить обновления</string>
     <string name="current_version">Текущая версия: %1$s (%2$d)</string>
+    <string name="profile_section_title">Мой профиль</string>
+    <string name="first_name">Имя</string>
+    <string name="last_name">Фамилия</string>
+    <string name="username">Username</string>
+    <string name="profile_description">Описание</string>
+    <string name="save_profile">Сохранить профиль</string>
+    <string name="search_profile_title">Найти профиль</string>
+    <string name="search_username">Введите username</string>
+    <string name="find_profile">Найти</string>
+    <string name="enter_username_to_search">Введите username для поиска</string>
+    <string name="username_required">Username обязателен</string>
+    <string name="profile_saved">Профиль сохранён</string>
+    <string name="no_profile_description">Описание не указано</string>
+    <string name="peer_id_unknown">peerId пока неизвестен</string>
+    <string name="peer_id_value">peerId: %1$s</string>
 </resources>

docs/ARCHITECTURE.md

@@ -2,11 +2,12 @@
 
 ## Слои
 - BLE Transport: сканирование, реклама, соединения, обмен пакетами.
-- Mesh Layer: маршрутизация, TTL, дедупликация, ACK.
+- Mesh Layer: маршрутизация, TTL, дедупликация, ACK, ретрансляция профильных пакетов.
 - Messaging Layer: список чатов, отдельный экран диалога, статусы доставки, история.
-- Storage Layer: Room для локального хранения.
+- Storage Layer: Room для локального хранения сообщений, очереди и профилей.
 - Delivery Layer: retry queue, ACK timeout, повторные отправки из фонового сервиса.
 - Update Layer: `version.json`, changelog и ручная/автоматическая проверка обновлений клиента.
+- Profile Layer: локальный профиль пользователя, `username` как основной идентификатор, кэш профилей из mesh-сети и разрешение `username -> peerId`.
 
 ## Пользовательский сценарий
 - Главный экран показывает список чатов в стиле Telegram.
@@ -14,11 +15,13 @@
 - Слева в шапке показывается общее количество известных устройств в mesh.
 - Настройки вынесены в меню `три точки`, отдельный debug-лог из пользовательского интерфейса убран.
 - Отправка сообщений доступна только из экрана конкретного диалога.
+- В настройках пользователь редактирует свой профиль и ищет другие профили по `username`.
 
 ## Топология сети
 - Выделенный сервер или хост для работы mesh не нужен.
 - Все узлы равноправны: каждый телефон может быть источником, получателем и ретранслятором.
 - Сеть не рассчитана на бесконечное число пользователей. Масштаб ограничивается радиусом BLE, количеством соседних соединений, частотой ретрансляции и ограничениями Android по энергии и фону.
+- Профильные данные передаются отдельными mesh-пакетами и кэшируются на устройствах. Это даёт распределённый каталог пользователей без центрального сервера, но актуальность данных зависит от распространения пакетов по сети.
 
 ## Сетевой пакет (черновик)
 ```json
@@ -28,12 +31,12 @@
   "targetId": "user-or-group-id",
   "ttl": 6,
   "timestamp": 0,
-  "type": "message|ack|presence",
+  "type": "message|ack|presence|profile",
   "payload": "base64-or-json"
 }
 ```
 
 ## Ближайшие шаги
 1. Укрепить transport: фрагментация крупных пакетов и более надёжный reconnect.
-2. Ввести шифрование payload и управление профилями пользователей.
+2. Ввести шифрование payload и подпись пакетов.
 3. Добавить инструментальные BLE-тесты на нескольких устройствах и полевой прогон.

website/index.html

@@ -42,7 +42,7 @@
         <div class="row g-3">
           <div class="col-md-4"><div class="feature p-3 rounded-4"><i class="bi bi-broadcast-pin fs-2"></i><h5 class="mt-2">BLE-поиск</h5><p class="mb-0">Обнаружение ближайших узлов и обмен пакетами без интернета.</p></div></div>
           <div class="col-md-4"><div class="feature p-3 rounded-4"><i class="bi bi-share fs-2"></i><h5 class="mt-2">Mesh-ретрансляция</h5><p class="mb-0">Передача сообщений hop-by-hop с TTL, ACK и повторными попытками.</p></div></div>
-          <div class="col-md-4"><div class="feature p-3 rounded-4"><i class="bi bi-database fs-2"></i><h5 class="mt-2">Локальное хранение</h5><p class="mb-0">Room хранит историю сообщений и очередь исходящей доставки.</p></div></div>
+          <div class="col-md-4"><div class="feature p-3 rounded-4"><i class="bi bi-database fs-2"></i><h5 class="mt-2">Локальное хранение</h5><p class="mb-0">Room хранит историю сообщений, очередь доставки и кэш профилей пользователей.</p></div></div>
         </div>
       </div>
     </section>