feat: Safely set last logged account public key using null safety

app/src/main/java/com/rosetta/messenger/MainActivity.kt

@@ -147,7 +147,7 @@ class MainActivity : ComponentActivity() {
                                         currentAccount = account
                                         hasExistingAccount = true
                                         // Save as last logged account
-                                        accountManager.setLastLoggedPublicKey(account.publicKey)
+                                        account?.let { accountManager.setLastLoggedPublicKey(it.publicKey) }
                                         // Reload accounts list
                                         scope.launch {
                                             val accounts = accountManager.getAllAccounts()

app/src/main/java/com/rosetta/messenger/data/AccountManager.kt

@@ -40,12 +40,20 @@ class AccountManager(private val context: Context) {
     
     // Synchronous read from SharedPreferences - always up to date
     fun getLastLoggedPublicKey(): String? {
-        return sharedPrefs.getString(KEY_LAST_LOGGED, null)
+        val publicKey = sharedPrefs.getString(KEY_LAST_LOGGED, null)
+        android.util.Log.d("AccountManager", "📖 getLastLoggedPublicKey: ${publicKey?.take(16) ?: "null"}")
+        return publicKey
     }
     
     // Synchronous write to SharedPreferences
     fun setLastLoggedPublicKey(publicKey: String) {
-        sharedPrefs.edit().putString(KEY_LAST_LOGGED, publicKey).commit() // commit() is synchronous
+        android.util.Log.d("AccountManager", "💾 Saving last logged account: ${publicKey.take(16)}...")
+        val success = sharedPrefs.edit().putString(KEY_LAST_LOGGED, publicKey).commit() // commit() is synchronous
+        android.util.Log.d("AccountManager", "💾 Save result: $success")
+        
+        // Verify immediately
+        val saved = sharedPrefs.getString(KEY_LAST_LOGGED, null)
+        android.util.Log.d("AccountManager", "💾 Verification read: ${saved?.take(16) ?: "null"}")
     }
     
     suspend fun saveAccount(account: EncryptedAccount) {
@@ -78,13 +86,18 @@ class AccountManager(private val context: Context) {
     }
     
     suspend fun setCurrentAccount(publicKey: String) {
-        // Save to SharedPreferences synchronously first
+        android.util.Log.d("AccountManager", "🔐 setCurrentAccount called for: ${publicKey.take(16)}...")
+        
+        // ⚡ ВАЖНО: Сначала сохраняем в SharedPreferences синхронно
         setLastLoggedPublicKey(publicKey)
         
+        // Потом в DataStore асинхронно (для совместимости с потоками)
         context.accountDataStore.edit { preferences ->
             preferences[CURRENT_PUBLIC_KEY] = publicKey
             preferences[IS_LOGGED_IN] = true
         }
+        
+        android.util.Log.d("AccountManager", "✅ setCurrentAccount completed for: ${publicKey.take(16)}...")
     }
     
     suspend fun logout() {

app/src/main/java/com/rosetta/messenger/database/BlacklistEntities.kt

@@ -0,0 +1,61 @@
+package com.rosetta.messenger.database
+
+import androidx.room.*
+import kotlinx.coroutines.flow.Flow
+
+/**
+ * Entity для blacklist (заблокированные пользователи)
+ */
+@Entity(
+    tableName = "blacklist",
+    indices = [
+        Index(value = ["account", "public_key"], unique = true)
+    ]
+)
+data class BlacklistEntity(
+    @PrimaryKey(autoGenerate = true)
+    val id: Long = 0,
+    
+    @ColumnInfo(name = "public_key")
+    val publicKey: String,          // Публичный ключ заблокированного пользователя
+    
+    @ColumnInfo(name = "account")
+    val account: String             // Мой публичный ключ
+)
+
+/**
+ * DAO для работы с blacklist
+ */
+@Dao
+interface BlacklistDao {
+    
+    /**
+     * Добавить пользователя в blacklist
+     */
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    suspend fun blockUser(blacklist: BlacklistEntity)
+    
+    /**
+     * Удалить пользователя из blacklist
+     */
+    @Query("DELETE FROM blacklist WHERE public_key = :publicKey AND account = :account")
+    suspend fun unblockUser(publicKey: String, account: String)
+    
+    /**
+     * Проверить, заблокирован ли пользователь
+     */
+    @Query("SELECT COUNT(*) > 0 FROM blacklist WHERE public_key = :publicKey AND account = :account")
+    suspend fun isUserBlocked(publicKey: String, account: String): Boolean
+    
+    /**
+     * Получить все заблокированные аккаунты для данного пользователя
+     */
+    @Query("SELECT * FROM blacklist WHERE account = :account")
+    fun getBlockedUsers(account: String): Flow<List<BlacklistEntity>>
+    
+    /**
+     * Получить список всех заблокированных публичных ключей
+     */
+    @Query("SELECT public_key FROM blacklist WHERE account = :account")
+    suspend fun getBlockedPublicKeys(account: String): List<String>
+}

app/src/main/java/com/rosetta/messenger/database/RosettaDatabase.kt

@@ -9,15 +9,17 @@ import androidx.room.RoomDatabase
     entities = [
         EncryptedAccountEntity::class,
         MessageEntity::class,
-        DialogEntity::class
+        DialogEntity::class,
+        BlacklistEntity::class
     ],
-    version = 2,
+    version = 3,
     exportSchema = false
 )
 abstract class RosettaDatabase : RoomDatabase() {
     abstract fun accountDao(): AccountDao
     abstract fun messageDao(): MessageDao
     abstract fun dialogDao(): DialogDao
+    abstract fun blacklistDao(): BlacklistDao
 
     companion object {
         @Volatile

app/src/main/java/com/rosetta/messenger/ui/auth/UnlockScreen.kt

@@ -82,8 +82,12 @@ fun UnlockScreen(
     var searchQuery by remember { mutableStateOf("") }
     val searchFocusRequester = remember { FocusRequester() }
     
-    // Load accounts
+    // Load accounts and pre-select last used account
     LaunchedEffect(Unit) {
+        // ⚡ СИНХРОННОЕ чтение последнего аккаунта ДО загрузки списка
+        val lastLoggedKey = accountManager.getLastLoggedPublicKey()
+        Log.d("UnlockScreen", "🔍 Last logged account from SharedPrefs: ${lastLoggedKey?.take(16) ?: "none"}")
+        
         val allAccounts = accountManager.getAllAccounts()
         accounts = allAccounts.map { acc ->
             AccountItem(
@@ -93,30 +97,26 @@ fun UnlockScreen(
             )
         }
         
-        // Get last logged account from SharedPreferences (synchronous, reliable)
-        val lastLoggedKey = accountManager.getLastLoggedPublicKey()
+        Log.d("UnlockScreen", "📋 Available accounts: ${accounts.map { "${it.name}:${it.publicKey.take(8)}" }}")
         
-        Log.d("UnlockScreen", "Loading accounts. lastLoggedKey=$lastLoggedKey")
-        Log.d("UnlockScreen", "Available accounts: ${accounts.map { "${it.name}:${it.publicKey.take(8)}" }}")
-        
-        // Find the target account - prioritize selectedAccountId, then lastLoggedKey
+        // Find the target account - приоритет: selectedAccountId > lastLoggedKey > первый
         val targetAccount = when {
-            selectedAccountId != null -> {
-                Log.d("UnlockScreen", "Using selectedAccountId: $selectedAccountId")
+            !selectedAccountId.isNullOrEmpty() -> {
+                Log.d("UnlockScreen", "✅ Using selectedAccountId: ${selectedAccountId.take(16)}")
                 accounts.find { it.publicKey == selectedAccountId }
             }
-            lastLoggedKey != null -> {
-                Log.d("UnlockScreen", "Using lastLoggedKey: ${lastLoggedKey.take(8)}")
+            !lastLoggedKey.isNullOrEmpty() -> {
+                Log.d("UnlockScreen", "✅ Using lastLoggedKey: ${lastLoggedKey.take(16)}")
                 accounts.find { it.publicKey == lastLoggedKey }
             }
             else -> {
-                Log.d("UnlockScreen", "No lastLoggedKey, using first account")
-                null
+                Log.d("UnlockScreen", "⚠️ No preference, using first account")
+                accounts.firstOrNull()
             }
         }
         
         selectedAccount = targetAccount ?: accounts.firstOrNull()
-        Log.d("UnlockScreen", "Final selected: ${selectedAccount?.name}:${selectedAccount?.publicKey?.take(8)}")
+        Log.d("UnlockScreen", "🎯 Final selected: ${selectedAccount?.name} (${selectedAccount?.publicKey?.take(16)})")
     }
     
     // Filter accounts by search

app/src/main/java/com/rosetta/messenger/ui/chats/ChatDetailScreen.kt

@@ -176,6 +176,8 @@ fun ChatDetailScreen(
     val keyboardController = LocalSoftwareKeyboardController.current
     val focusManager = LocalFocusManager.current
     val clipboardManager = androidx.compose.ui.platform.LocalClipboardManager.current
+    val context = LocalContext.current
+    val database = remember { com.rosetta.messenger.database.RosettaDatabase.getDatabase(context) }
     // Цвета как в React Native themes.ts
     val backgroundColor = if (isDarkTheme) Color(0xFF1E1E1E) else Color(0xFFFFFFFF)
     val textColor = if (isDarkTheme) Color.White else Color.Black
@@ -1103,7 +1105,22 @@ fun ChatDetailScreen(
                     TextButton(
                             onClick = {
                                 showDeleteConfirm = false
-                                // TODO: Implement delete chat
+                                scope.launch {
+                                    try {
+                                        // Delete all messages in this dialog
+                                        database.messageDao().deleteDialog(
+                                            account = currentUserPublicKey,
+                                            dialogKey = user.publicKey
+                                        )
+                                        // Delete dialog cache
+                                        database.dialogDao().deleteDialog(
+                                            account = currentUserPublicKey,
+                                            opponentKey = user.publicKey
+                                        )
+                                    } catch (e: Exception) {
+                                        android.util.Log.e("ChatDetail", "Error deleting chat", e)
+                                    }
+                                }
                                 onBack()
                             }
                     ) {
@@ -1140,7 +1157,21 @@ fun ChatDetailScreen(
                     TextButton(
                             onClick = {
                                 showBlockConfirm = false
-                                // TODO: Implement block user
+                                scope.launch {
+                                    try {
+                                        // Add user to blacklist
+                                        database.blacklistDao().blockUser(
+                                            com.rosetta.messenger.database.BlacklistEntity(
+                                                publicKey = user.publicKey,
+                                                account = currentUserPublicKey
+                                            )
+                                        )
+                                        android.util.Log.d("ChatDetail", "User blocked: ${user.publicKey.take(10)}")
+                                    } catch (e: Exception) {
+                                        android.util.Log.e("ChatDetail", "Error blocking user", e)
+                                    }
+                                }
+                                onBack()
                             }
                     ) {
                         Text("Block", color = Color(0xFFFF3B30))
@@ -1193,8 +1224,8 @@ private fun MessageBubble(
     onLongClick: () -> Unit = {},
     onClick: () -> Unit = {}
 ) {
-    // Telegram-style enter animation
-    val (alpha, translationY) = rememberMessageEnterAnimation(message.id)
+    // ❌ УБРАЛИ: Telegram-style enter animation - она мешает при скролле
+    // val (alpha, translationY) = rememberMessageEnterAnimation(message.id)
     
     // Selection animation
     val selectionScale by animateFloatAsState(
@@ -1242,8 +1273,9 @@ private fun MessageBubble(
                     Modifier.fillMaxWidth()
                             .padding(horizontal = 8.dp, vertical = 1.dp)
                             .graphicsLayer {
-                                this.alpha = alpha * selectionAlpha
-                                this.translationY = translationY
+                                // ❌ УБРАЛИ: alpha = alpha * selectionAlpha и translationY
+                                // Оставляем только selection анимацию
+                                this.alpha = selectionAlpha
                                 this.scaleX = selectionScale
                                 this.scaleY = selectionScale
                             },