Fix caching

Signed-off-by: denis0001-dev <denis0001.dev@ya.ru>

app/shared/src/androidMain/kotlin/ru/fromchat/net/NetworkConnectivity.android.kt

@@ -0,0 +1,47 @@
+package ru.fromchat.net
+
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.Network
+import android.net.NetworkCapabilities
+import android.net.NetworkRequest
+import com.pr0gramm3r101.utils.UtilsLibrary
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+import ru.fromchat.api.WebSocketManager
+
+actual object NetworkConnectivity {
+    private val _isOnline = MutableStateFlow(true)
+    actual val isOnline: StateFlow<Boolean> = _isOnline.asStateFlow()
+
+    private var callback: ConnectivityManager.NetworkCallback? = null
+
+    @Suppress("DEPRECATION")
+    private fun computeOnline(cm: ConnectivityManager): Boolean {
+        val n = cm.activeNetwork ?: return false
+        val caps = cm.getNetworkCapabilities(n) ?: return false
+        return caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
+    }
+
+    actual fun ensureStarted() {
+        if (callback != null) return
+        val context = UtilsLibrary.context
+        val cm = context.getSystemService(Context.CONNECTIVITY_SERVICE) as ConnectivityManager
+        _isOnline.value = computeOnline(cm)
+
+        val cb = object : ConnectivityManager.NetworkCallback() {
+            override fun onAvailable(network: Network) {
+                _isOnline.value = true
+                WebSocketManager.onNetworkAvailable()
+            }
+
+            override fun onLost(network: Network) {
+                _isOnline.value = false
+                WebSocketManager.onNetworkLost()
+            }
+        }
+        callback = cb
+        cm.registerNetworkCallback(NetworkRequest.Builder().build(), cb)
+    }
+}

app/shared/src/commonMain/kotlin/ru/fromchat/api/WebSocketManager.kt

@@ -30,6 +30,8 @@ import kotlin.time.Clock
 import kotlin.time.ExperimentalTime
 
 object WebSocketManager {
+    private const val RECONNECT_DELAY_MS = 1_000L
+
     // Config
     private val scope = CoroutineScope(Dispatchers.IO)
     private val json = Json { ignoreUnknownKeys = true }
@@ -72,21 +74,26 @@ object WebSocketManager {
         return session != null
     }
 
-    fun connect() {
-        Logger.d("WebSocketManager", "connect() called. current session=${session != null}, connecting=$connecting")
+    fun connect(forceRestart: Boolean = false) {
+        Logger.d(
+            "WebSocketManager",
+            "connect(forceRestart=$forceRestart) called. current session=${session != null}, connecting=$connecting"
+        )
 
+        if (forceRestart) {
+            connectionJob?.cancel()
+            connectionJob = null
+        } else {
             val existingJob = connectionJob
             if (existingJob != null && existingJob.isActive) {
                 Logger.d("WebSocketManager", "connect() ignored: connectionJob already running")
                 return
             }
+        }
 
-        // Always reflect that we are trying to connect while this loop is active
         ConnectionStateStore.onConnecting()
 
         connectionJob = scope.launch {
-            var backoffMs = 1_000L
-
             while (isActive) {
                 Logger.d("WebSocketManager", "Connection loop active. isActive=$isActive")
 
@@ -94,7 +101,7 @@ object WebSocketManager {
                 if (token.isNullOrEmpty()) {
                     Logger.d("WebSocketManager", "No auth token available; staying in CONNECTING and retrying later")
                     ConnectionStateStore.onConnecting()
-                    delay(backoffMs.coerceAtMost(5_000L))
+                    delay(RECONNECT_DELAY_MS)
                     continue
                 }
 
@@ -112,7 +119,6 @@ object WebSocketManager {
                     ) {
                         session = this
                         connecting = false
-                        backoffMs = 1_000L
                         Logger.d("WebSocketManager", "WebSocket connected. connecting set to false")
                         ConnectionStateStore.onConnected()
 
@@ -188,9 +194,8 @@ object WebSocketManager {
                     ConnectionStateStore.onConnecting()
 
                     if (isActive) {
-                        Logger.d("WebSocketManager", "Reconnecting in ${backoffMs}ms...")
-                        delay(backoffMs)
-                        backoffMs = (backoffMs * 2).coerceAtMost(15_000L)
+                        Logger.d("WebSocketManager", "Reconnecting in ${RECONNECT_DELAY_MS}ms...")
+                        delay(RECONNECT_DELAY_MS)
                     }
                 }
             }
@@ -268,4 +273,19 @@ object WebSocketManager {
         connecting = false
         Logger.d("WebSocketManager", "Disconnected. session set to null, connecting set to false")
     }
+
+    /** OS reported loss of network: fail fast and show connecting until back online. */
+    fun onNetworkLost() {
+        Logger.d("WebSocketManager", "onNetworkLost")
+        connectionJob?.cancel()
+        connectionJob = null
+        disconnect()
+        ConnectionStateStore.onConnecting()
+    }
+
+    /** OS reported network available: restart the 1s reconnect loop immediately. */
+    fun onNetworkAvailable() {
+        Logger.d("WebSocketManager", "onNetworkAvailable")
+        connect(forceRestart = true)
+    }
 }

app/shared/src/commonMain/kotlin/ru/fromchat/api/db/MessageCacheStore.kt

@@ -33,7 +33,21 @@ object MessageCacheStore {
     }
 
     suspend fun replacePublicMessages(messages: List<Message>) {
-        replaceMessages(conversationIdForPublic(), messages)
+        val pending = loadPublicMessages().filter { it.id < 0 }
+        val stillPending = pending.filter { p ->
+            val cid = p.client_message_id
+            cid == null || messages.none { it.client_message_id == cid }
+        }
+        val merged = (messages + stillPending)
+            .distinctBy { msg ->
+                when {
+                    msg.id > 0 -> "i:${msg.id}"
+                    msg.client_message_id != null -> "c:${msg.client_message_id}"
+                    else -> "i:${msg.id}"
+                }
+            }
+            .sortedBy { it.timestamp }
+        replaceMessages(conversationIdForPublic(), merged)
     }
 
     suspend fun loadDmMessages(otherUserId: Int): List<Message> {
@@ -41,7 +55,89 @@ object MessageCacheStore {
     }
 
     suspend fun replaceDmMessages(otherUserId: Int, messages: List<Message>) {
-        replaceMessages(conversationIdForDm(otherUserId), messages)
+        val convId = conversationIdForDm(otherUserId)
+        val pending = loadDmMessages(otherUserId).filter { it.id < 0 }
+        val stillPending = pending.filter { p ->
+            val cid = p.client_message_id
+            cid == null || messages.none { it.client_message_id == cid }
+        }
+        val merged = (messages + stillPending)
+            .distinctBy { msg ->
+                when {
+                    msg.id > 0 -> "i:${msg.id}"
+                    msg.client_message_id != null -> "c:${msg.client_message_id}"
+                    else -> "i:${msg.id}"
+                }
+            }
+            .sortedBy { it.timestamp }
+        replaceMessages(convId, merged)
+    }
+
+    suspend fun upsertPublicMessage(message: Message) {
+        upsertSingle(conversationIdForPublic(), message)
+    }
+
+    suspend fun upsertDmMessage(otherUserId: Int, message: Message) {
+        upsertSingle(conversationIdForDm(otherUserId), message)
+    }
+
+    suspend fun deletePublicMessageByClientMessageId(clientMessageId: String) {
+        deleteByClientMessageId(conversationIdForPublic(), clientMessageId)
+    }
+
+    suspend fun deleteDmMessageByClientMessageId(otherUserId: Int, clientMessageId: String) {
+        deleteByClientMessageId(conversationIdForDm(otherUserId), clientMessageId)
+    }
+
+    suspend fun confirmPublicMessage(clientMessageId: String, confirmed: Message) {
+        confirmMessage(conversationIdForPublic(), clientMessageId, confirmed)
+    }
+
+    suspend fun confirmDmMessage(otherUserId: Int, clientMessageId: String, confirmed: Message) {
+        confirmMessage(conversationIdForDm(otherUserId), clientMessageId, confirmed)
+    }
+
+    private suspend fun deleteByClientMessageId(conversationId: String, clientMessageId: String) {
+        withContext(Dispatchers.Default) {
+            db.messageDatabaseQueries.deleteMessageByClientMessageId(conversationId, clientMessageId)
+        }
+    }
+
+    private suspend fun upsertSingle(conversationId: String, msg: Message) {
+        withContext(Dispatchers.Default) {
+            db.messageDatabaseQueries.upsertMessage(
+                id = msg.id.toLong(),
+                conversationId = conversationId,
+                userId = msg.user_id.toLong(),
+                content = msg.content,
+                timestamp = msg.timestamp,
+                isRead = if (msg.is_read) 1L else 0L,
+                isEdited = if (msg.is_edited) 1L else 0L,
+                replyToId = msg.reply_to?.id?.toLong(),
+                clientMessageId = msg.client_message_id,
+                deletedFlag = 0L
+            )
+        }
+    }
+
+    private suspend fun confirmMessage(conversationId: String, clientMessageId: String, confirmed: Message) {
+        withContext(Dispatchers.Default) {
+            db.messageDatabaseQueries.transaction {
+                db.messageDatabaseQueries.deleteMessageByClientMessageId(conversationId, clientMessageId)
+                db.messageDatabaseQueries.upsertMessage(
+                    id = confirmed.id.toLong(),
+                    conversationId = conversationId,
+                    userId = confirmed.user_id.toLong(),
+                    content = confirmed.content,
+                    timestamp = confirmed.timestamp,
+                    isRead = if (confirmed.is_read) 1L else 0L,
+                    isEdited = if (confirmed.is_edited) 1L else 0L,
+                    replyToId = confirmed.reply_to?.id?.toLong(),
+                    clientMessageId = confirmed.client_message_id,
+                    deletedFlag = 0L
+                )
+            }
+        }
     }
 
     private suspend fun loadMessages(conversationId: String): List<Message> =

app/shared/src/commonMain/kotlin/ru/fromchat/net/NetworkConnectivity.kt

@@ -0,0 +1,10 @@
+package ru.fromchat.net
+
+import kotlinx.coroutines.flow.StateFlow
+
+expect object NetworkConnectivity {
+    val isOnline: StateFlow<Boolean>
+
+    /** Register OS callbacks once (Android: ConnectivityManager; iOS: best-effort). */
+    fun ensureStarted()
+}

app/shared/src/commonMain/kotlin/ru/fromchat/ui/App.kt

@@ -24,6 +24,7 @@ import androidx.navigation.compose.rememberNavController
 import ru.fromchat.api.ApiClient
 import ru.fromchat.api.UpdateSyncManager
 import ru.fromchat.api.WebSocketManager
+import ru.fromchat.net.NetworkConnectivity
 import ru.fromchat.core.config.Config
 import ru.fromchat.ui.auth.LoginScreen
 import ru.fromchat.ui.auth.RegisterScreen
@@ -47,6 +48,8 @@ fun App(scrollToMessageId: Int? = null, startAtPublicChat: Boolean = false) {
             Config.initialize()
         }
 
+        runCatching { NetworkConnectivity.ensureStarted() }
+
         // Load persisted token and user data
         ApiClient.loadPersistedData()
 

app/shared/src/commonMain/kotlin/ru/fromchat/ui/ConnectingEllipsis.kt

@@ -0,0 +1,60 @@
+package ru.fromchat.ui
+
+import androidx.compose.animation.AnimatedVisibility
+import androidx.compose.animation.fadeIn
+import androidx.compose.animation.fadeOut
+import androidx.compose.foundation.layout.Row
+import androidx.compose.material3.LocalTextStyle
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.unit.TextUnit
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.isActive
+
+/**
+ * Animated "..." that grows to three dots, clears, and repeats. Uses [LocalTextStyle] when
+ * [fontSize] / [color] are left default so it matches surrounding typography.
+ */
+@Composable
+fun ConnectingEllipsis(
+    modifier: Modifier = Modifier,
+    fontSize: TextUnit = LocalTextStyle.current.fontSize,
+    color: Color = LocalTextStyle.current.color,
+    baseStyle: TextStyle = LocalTextStyle.current,
+    stepMs: Long = 440,
+) {
+    val merged = remember(fontSize, color, baseStyle) {
+        baseStyle.merge(TextStyle(fontSize = fontSize, color = color))
+    }
+    var visibleDots by remember { mutableIntStateOf(0) }
+    LaunchedEffect(Unit) {
+        while (isActive) {
+            for (n in 1..3) {
+                visibleDots = n
+                delay(stepMs)
+            }
+            visibleDots = 0
+            delay(stepMs / 2)
+        }
+    }
+    Row(modifier = modifier, verticalAlignment = Alignment.Bottom) {
+        repeat(3) { i ->
+            AnimatedVisibility(
+                visible = i < visibleDots,
+                enter = fadeIn(),
+                exit = fadeOut()
+            ) {
+                Text(text = ".", style = merged)
+            }
+        }
+    }
+}

app/shared/src/commonMain/kotlin/ru/fromchat/ui/chat/ChatPanel.kt

@@ -94,7 +94,14 @@ abstract class ChatPanel(
      */
     suspend fun addMessage(message: Message) {
         addMessageMutex.withLock {
-            val messageExists = _state.messages.any { it.id == message.id }
+            val messageExists = when {
+                message.id > 0 -> _state.messages.any { it.id == message.id }
+                else -> {
+                    val cid = message.client_message_id
+                    if (cid != null) _state.messages.any { it.client_message_id == cid }
+                    else _state.messages.any { it.id == message.id }
+                }
+            }
             if (!messageExists) {
                 Logger.d("ChatPanel", "Adding message: id=${message.id}, content=${message.content.take(50)}")
                 updateState { currentState ->
@@ -116,7 +123,14 @@ abstract class ChatPanel(
         if (messages.isEmpty()) return
         addMessageMutex.withLock {
             val existingIds = _state.messages.mapTo(mutableSetOf()) { it.id }
-            val newOnes = messages.filter { it.id !in existingIds }
+            val existingClientIds = _state.messages.mapNotNullTo(mutableSetOf()) { it.client_message_id }
+            val newOnes = messages.filter { msg ->
+                when {
+                    msg.id > 0 -> msg.id !in existingIds
+                    msg.client_message_id != null -> msg.client_message_id !in existingClientIds
+                    else -> msg.id !in existingIds
+                }
+            }
             if (newOnes.isNotEmpty()) {
                 updateState { currentState ->
                     val newMessages = (currentState.messages + newOnes).sortedBy { it.timestamp }
@@ -150,6 +164,12 @@ abstract class ChatPanel(
         updateState { it.copy(messages = it.messages.filter { msg -> msg.id != messageId }) }
     }
 
+    protected fun removeMessageByClientMessageId(clientMessageId: String) {
+        updateState {
+            it.copy(messages = it.messages.filter { msg -> msg.client_message_id != clientMessageId })
+        }
+    }
+
     /**
      * Clear all messages
      */
@@ -185,23 +205,31 @@ abstract class ChatPanel(
         val pending = pendingMessages.remove(tempId)
         pending?.first?.cancel()
 
-        // Replace temporary message with confirmed one
         updateState { currentState ->
-            currentState.copy(
-                messages = currentState.messages.map { msg ->
-                    // Check if this is the temp message (negative ID)
-                    if (msg.id < 0) {
-                        // Try to match by content or other criteria
-                        // For now, we'll replace based on tempId stored in pendingMessages
-                        confirmedMessage
+            val withoutDupReal = if (confirmedMessage.id > 0) {
+                currentState.messages.filter { it.id != confirmedMessage.id }
             } else {
-                        msg
-                    }
-                }
-            )
+                currentState.messages
+            }
+            val hadTemp = withoutDupReal.any { it.client_message_id == tempId }
+            val mapped = withoutDupReal.map { msg ->
+                if (msg.client_message_id == tempId) confirmedMessage else msg
+            }
+            val messages = when {
+                hadTemp -> mapped
+                confirmedMessage.id > 0 && mapped.none { it.id == confirmedMessage.id } ->
+                    mapped + confirmedMessage
+                else -> mapped
+            }
+            currentState.copy(messages = messages)
+        }
+        scope.launch(Dispatchers.Default) {
+            runCatching { onOptimisticMessageConfirmed(tempId, confirmedMessage) }
         }
     }
 
+    protected open suspend fun onOptimisticMessageConfirmed(clientMessageId: String, confirmed: Message) {}
+
     /**
      * Retry failed message
      */
@@ -209,42 +237,40 @@ abstract class ChatPanel(
     suspend fun retryMessage(messageId: Int) {
         val message = _state.messages.find { it.id == messageId } ?: return
 
-        // Create new temp ID for retry
         val tempId = "temp_${Clock.System.now().toEpochMilliseconds()}_${(0..999999).random()}"
+        val newOptimistic = message.copy(
+            id = uniqueOptimisticMessageId(),
+            client_message_id = tempId
+        )
 
-        // Create temp message for retry
-        val tempMessage = message.copy(id = -1)
-
-        // Update message to sending state
         updateState { currentState ->
             currentState.copy(
                 messages = currentState.messages.map { msg ->
-                    if (msg.id == messageId) {
-                        tempMessage
-                    } else {
-                        msg
-                    }
+                    if (msg.id == messageId) newOptimistic else msg
                 }
             )
         }
 
-        // Set up timeout
         val timeoutJob = scope.launch {
-            delay(10000) // 10 seconds
+            delay(10000)
             handleMessageTimeout(tempId)
         }
 
-        pendingMessages[tempId] = timeoutJob to tempMessage
+        pendingMessages[tempId] = timeoutJob to newOptimistic
+
+        scope.launch(Dispatchers.Default) {
+            runCatching { persistOptimisticMessage(newOptimistic) }
+        }
 
-        // Retry sending
         try {
-            // Extract content from message
-            sendMessage(message.content, message.reply_to?.id, message.client_message_id)
-        } catch (e: Exception) {
+            sendMessage(message.content, message.reply_to?.id, tempId)
+        } catch (_: Exception) {
             timeoutJob.cancel()
             pendingMessages.remove(tempId)
-            // Mark as failed
-            updateMessage(-1) { it.copy() }
+            removeMessageByClientMessageId(tempId)
+            scope.launch(Dispatchers.Default) {
+                runCatching { removeOptimisticFromCache(newOptimistic) }
+            }
         }
     }
 
@@ -254,21 +280,6 @@ abstract class ChatPanel(
     private fun handleMessageTimeout(tempId: String) {
         val pending = pendingMessages.remove(tempId)
         pending?.first?.cancel()
-
-        // Mark message as failed
-        updateState { currentState ->
-            currentState.copy(
-                messages = currentState.messages.map { msg ->
-                    if (msg.id < 0) {
-                        // Mark as failed - we'll need to add a status field to Message
-                        // For now, just keep it
-                        msg
-                    } else {
-                        msg
-                    }
-                }
-            )
-        }
     }
 
     /**
@@ -301,8 +312,9 @@ abstract class ChatPanel(
             }
         )
 
-        // Add message immediately
-        addMessage(tempMessage)
+        // Unique negative id avoids duplicate LazyColumn keys and bad merge logic.
+        val optimistic = tempMessage.copy(id = uniqueOptimisticMessageId())
+        addMessage(optimistic)
 
         // Set up timeout for failure
         val timeoutJob = scope.launch {
@@ -311,19 +323,38 @@ abstract class ChatPanel(
         }
 
         // Store pending message
-        pendingMessages[tempId] = timeoutJob to tempMessage
+        pendingMessages[tempId] = timeoutJob to optimistic
+
+        scope.launch(Dispatchers.Default) {
+            runCatching { persistOptimisticMessage(optimistic) }
+        }
 
         // Actually send the message
         try {
             sendMessage(content, replyToId, tempId)
             // Message sent successfully - will be updated when WebSocket confirms
         } catch (error: Exception) {
-            // Remove the temporary message from display
-            removeMessage(-1)
+            removeMessageByClientMessageId(tempId)
             pendingMessages.remove(tempId)
             timeoutJob.cancel()
+            scope.launch(Dispatchers.Default) {
+                runCatching { removeOptimisticFromCache(optimistic) }
             }
         }
+    }
+
+    private suspend fun uniqueOptimisticMessageId(): Int = addMessageMutex.withLock {
+        var id: Int
+        do {
+            id = -kotlin.random.Random.nextInt(1, Int.MAX_VALUE)
+        } while (_state.messages.any { it.id == id })
+        id
+    }
+
+    /** Persist optimistic row for offline / process death; no-op by default. */
+    protected open suspend fun persistOptimisticMessage(message: Message) {}
+
+    protected open suspend fun removeOptimisticFromCache(message: Message) {}
 
     /**
      * Clean up pending messages

app/shared/src/commonMain/kotlin/ru/fromchat/ui/chat/ChatScreen.kt

@@ -12,6 +12,7 @@ import androidx.compose.foundation.gestures.detectTapGestures
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.BoxWithConstraints
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
@@ -85,6 +86,8 @@ import ru.fromchat.api.WebSocketMessage
 import ru.fromchat.api.WebSocketUpdatesData
 import ru.fromchat.back
 import ru.fromchat.core.Logger
+import ru.fromchat.net.NetworkConnectivity
+import ru.fromchat.ui.ConnectingEllipsis
 import ru.fromchat.ui.HapticFeedbackEvent
 import ru.fromchat.ui.LocalNavController
 import ru.fromchat.ui.rememberHapticFeedback
@@ -142,6 +145,7 @@ fun ChatScreen(
     val currentTypingUsers = panelState.typingUsers // Directly use from panelState
     val statusMap by UserStatusStore.status.collectAsState()
     val connectionStatus by ConnectionStateStore.status.collectAsState()
+    val online by NetworkConnectivity.isOnline.collectAsState(initial = true)
     LaunchedEffect(currentTypingUsers) {
         Logger.d("ChatScreen", "currentTypingUsers updated (from panelState): ${currentTypingUsers.map { it.username }}")
     }
@@ -394,6 +398,7 @@ fun ChatScreen(
                                 )
 
                                 val subtitleKey = when {
+                                    !online -> "connecting"
                                     connectionStatus == ConnectionStatus.UPDATING -> "updating"
                                     connectionStatus != ConnectionStatus.CONNECTED -> "connecting"
                                     currentTypingUsers.isNotEmpty() -> "typing"
@@ -429,12 +434,23 @@ fun ChatScreen(
                                             )
                                         }
                                         key == "connecting" -> {
+                                            val st = MaterialTheme.typography.bodySmall
+                                            val col = MaterialTheme.colorScheme.onSurfaceVariant
+                                            Row(
+                                                modifier = Modifier.padding(top = 2.dp),
+                                                verticalAlignment = Alignment.CenterVertically
+                                            ) {
                                                 Text(
-                                                text = "Connecting...",
-                                                style = MaterialTheme.typography.bodySmall,
-                                                color = MaterialTheme.colorScheme.onSurfaceVariant,
-                                                modifier = Modifier.padding(top = 2.dp)
+                                                    text = "Connecting",
+                                                    style = st,
+                                                    color = col
                                                 )
+                                                ConnectingEllipsis(
+                                                    fontSize = st.fontSize,
+                                                    color = col,
+                                                    baseStyle = st
+                                                )
+                                            }
                                         }
                                         key == "typing" -> {
                                             TypingIndicator(
@@ -617,7 +633,9 @@ fun ChatScreen(
 
                         items(
                             items = panelState.messages,
-                            key = { it.uploadJobId ?: it.id.toString() }
+                            key = { msg ->
+                                msg.client_message_id ?: "id_${msg.id}_${msg.timestamp}"
+                            }
                         ) { message ->
                             var tapPositionInRoot by remember { mutableStateOf(IntOffset(0, 0)) }
 

app/shared/src/commonMain/kotlin/ru/fromchat/ui/chat/PublicChatPanel.kt

@@ -45,6 +45,19 @@ class PublicChatPanel(
         ApiClient.sendMessage(content, replyToId, clientMessageId)
     }
 
+    override suspend fun persistOptimisticMessage(message: Message) {
+        MessageCacheStore.upsertPublicMessage(message)
+    }
+
+    override suspend fun removeOptimisticFromCache(message: Message) {
+        val cid = message.client_message_id ?: return
+        MessageCacheStore.deletePublicMessageByClientMessageId(cid)
+    }
+
+    override suspend fun onOptimisticMessageConfirmed(clientMessageId: String, confirmed: Message) {
+        MessageCacheStore.confirmPublicMessage(clientMessageId, confirmed)
+    }
+
     override suspend fun loadMessages() {
         if (messagesLoaded) return
 

app/shared/src/commonMain/kotlin/ru/fromchat/ui/dm/DmPanel.kt

@@ -96,6 +96,19 @@ class DmPanel(
         )
     }
 
+    override suspend fun persistOptimisticMessage(message: Message) {
+        MessageCacheStore.upsertDmMessage(otherUserId, message)
+    }
+
+    override suspend fun removeOptimisticFromCache(message: Message) {
+        val cid = message.client_message_id ?: return
+        MessageCacheStore.deleteDmMessageByClientMessageId(otherUserId, cid)
+    }
+
+    override suspend fun onOptimisticMessageConfirmed(clientMessageId: String, confirmed: Message) {
+        MessageCacheStore.confirmDmMessage(otherUserId, clientMessageId, confirmed)
+    }
+
     override suspend fun loadMessages() {
         setLoading(true)
         try {
@@ -221,16 +234,22 @@ class DmPanel(
 
         updateState { currentState ->
             val existingRealIndex = currentState.messages.indexOfFirst { it.id == envelope.id }
+            val byClientIdIndex = currentState.messages.indexOfFirst { message ->
+                message.id < 0 &&
+                    message.user_id == currentUserId &&
+                    envelope.clientMessageId != null &&
+                    (message.client_message_id == envelope.clientMessageId || message.uploadJobId == envelope.clientMessageId)
+            }
             val exactOptimisticIndex = currentState.messages.indexOfFirst { message ->
                 message.user_id == currentUserId &&
                     message.pendingFileUri != null &&
                     envelope.clientMessageId != null &&
                     (message.client_message_id == envelope.clientMessageId || message.uploadJobId == envelope.clientMessageId)
             }
-            val optimisticIndex = if (exactOptimisticIndex >= 0) {
-                exactOptimisticIndex
-            } else {
-                currentState.messages.indexOfFirst { message ->
+            val optimisticIndex = when {
+                byClientIdIndex >= 0 -> byClientIdIndex
+                exactOptimisticIndex >= 0 -> exactOptimisticIndex
+                else -> currentState.messages.indexOfFirst { message ->
                     message.id < 0 &&
                         message.user_id == currentUserId &&
                         (message.pendingFileUri != null) == hasAttachments

app/shared/src/commonMain/kotlin/ru/fromchat/ui/main/ChatsTab.kt

@@ -7,8 +7,11 @@ import androidx.compose.animation.slideInVertically
 import androidx.compose.animation.slideOutVertically
 import androidx.compose.animation.togetherWith
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.ListItem
 import androidx.compose.material3.MediumTopAppBar
 import androidx.compose.material3.Scaffold
@@ -21,6 +24,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.input.nestedscroll.nestedScroll
 import androidx.compose.ui.text.style.TextOverflow
@@ -33,6 +37,8 @@ import ru.fromchat.api.db.CachedConversation
 import ru.fromchat.api.db.MessageCacheStore
 import ru.fromchat.chat_last_mesaage
 import ru.fromchat.public_chat
+import ru.fromchat.net.NetworkConnectivity
+import ru.fromchat.ui.ConnectingEllipsis
 import ru.fromchat.ui.LocalNavController
 
 @OptIn(ExperimentalMaterial3Api::class)
@@ -41,6 +47,7 @@ fun ChatsTab() {
     val navController = LocalNavController.current
     val scrollBehavior = TopAppBarDefaults.exitUntilCollapsedScrollBehavior()
     val connectionStatus by ConnectionStateStore.status.collectAsState()
+    val online by NetworkConnectivity.isOnline.collectAsState(initial = true)
     var dmConversations by remember { mutableStateOf<List<CachedConversation>>(emptyList()) }
 
     LaunchedEffect(Unit) {
@@ -60,10 +67,11 @@ fun ChatsTab() {
         }
     }
 
-    val titleText = when (connectionStatus) {
-        ConnectionStatus.UPDATING -> "Updating..."
-        ConnectionStatus.CONNECTING -> "Connecting..."
-        ConnectionStatus.CONNECTED -> "FromChat"
+    val titleKey = when {
+        !online -> "connecting"
+        connectionStatus == ConnectionStatus.UPDATING -> "updating"
+        connectionStatus == ConnectionStatus.CONNECTING -> "connecting"
+        else -> "fromchat"
     }
 
     Scaffold(
@@ -72,18 +80,50 @@ fun ChatsTab() {
             MediumTopAppBar(
                 title = {
                     AnimatedContent(
-                        targetState = titleText,
+                        targetState = titleKey,
                         transitionSpec = {
                             (slideInVertically { it / 2 } + fadeIn()) togetherWith
                                 (slideOutVertically { -it / 2 } + fadeOut())
                         },
                         label = "chats_title"
-                    ) { text ->
+                    ) { key ->
+                        when (key) {
+                            "connecting" -> {
+                                val style = MaterialTheme.typography.headlineSmall
+                                val color = MaterialTheme.colorScheme.onSurface
+                                Row(
+                                    verticalAlignment = Alignment.CenterVertically,
+                                    horizontalArrangement = Arrangement.Start
+                                ) {
                                     Text(
-                            text = text,
+                                        text = "Connecting",
+                                        style = style,
+                                        color = color,
                                         maxLines = 1,
                                         overflow = TextOverflow.Ellipsis
                                     )
+                                    ConnectingEllipsis(
+                                        fontSize = style.fontSize,
+                                        color = color,
+                                        baseStyle = style
+                                    )
+                                }
+                            }
+                            "updating" -> {
+                                Text(
+                                    text = "Updating...",
+                                    maxLines = 1,
+                                    overflow = TextOverflow.Ellipsis
+                                )
+                            }
+                            else -> {
+                                Text(
+                                    text = "FromChat",
+                                    maxLines = 1,
+                                    overflow = TextOverflow.Ellipsis
+                                )
+                            }
+                        }
                     }
                 },
                 scrollBehavior = scrollBehavior

app/shared/src/commonMain/kotlin/ru/fromchat/ui/profile/ProfileScreen.kt

@@ -65,6 +65,7 @@ import kotlinx.coroutines.withContext
 import ru.fromchat.api.ApiClient
 import ru.fromchat.api.ProfileCache
 import ru.fromchat.api.UserProfile
+import ru.fromchat.ui.LocalNavController
 import ru.fromchat.ui.chat.Avatar
 import ru.fromchat.ui.scaleOnPress
 
@@ -91,6 +92,8 @@ fun ProfileScreen(
     onOpenSettings: () -> Unit = {}
 ) {
     val clipboardManager: ClipboardManager = LocalClipboardManager.current
+    val navController = LocalNavController.current
+    val hideBackButton = navController.currentDestination?.route == "chat"
     val targetUserId = userId.takeIf { it != null && it > 0 }
     val fetchKey = targetUserId ?: 0
 
@@ -131,6 +134,7 @@ fun ProfileScreen(
             MediumTopAppBar(
                 title = { Text("Profile") },
                 navigationIcon = {
+                    if (!hideBackButton) {
                         Box(
                             modifier = Modifier
                                 .scaleOnPress(0.96f, onClick = onBack)
@@ -143,6 +147,7 @@ fun ProfileScreen(
                                 modifier = Modifier.size(24.dp)
                             )
                         }
+                    }
                 },
                 scrollBehavior = scrollBehavior
             )

app/shared/src/commonMain/kotlin/ru/fromchat/utils/RelativeTime.kt

@@ -1,32 +1,61 @@
 package ru.fromchat.utils
 
+import kotlinx.datetime.DatePeriod
 import kotlinx.datetime.Instant
 import kotlinx.datetime.TimeZone
+import kotlinx.datetime.minus
 import kotlinx.datetime.toLocalDateTime
+import kotlin.time.Clock
+import kotlin.time.ExperimentalTime
+
+private val monthShortEn = listOf(
+    "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+    "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+)
 
 /**
- * Returns a user-friendly string for online status / last seen from an ISO-8601 timestamp.
- *
- * Online users show "Online". Offline users show a 24-hour time in the user's local timezone:
- * - Same-day timestamps: "Last seen HH:mm"
- * - Older timestamps: "Last seen YYYY-MM-DD HH:mm"
+ * Returns a readable last-seen line in local time (24h clock), avoiding raw ISO dates.
  */
+@OptIn(ExperimentalTime::class)
 fun formatLastSeen(online: Boolean, lastSeenIso: String?): String {
     if (online) return "Online"
     val iso = lastSeenIso ?: return ""
 
-    val instant = runCatching { Instant.parse(iso) }.getOrNull() ?: return "Last seen $iso"
+    val instant = runCatching { Instant.parse(iso) }.getOrNull() ?: return "Last seen recently"
 
     val timeZone = TimeZone.currentSystemDefault()
     val lastLocal = instant.toLocalDateTime(timeZone)
+    val nowDate = Instant.fromEpochMilliseconds(Clock.System.now().toEpochMilliseconds())
+        .toLocalDateTime(timeZone).date
+    val lastDate = lastLocal.date
 
-    val year = lastLocal.date.year
-    val month = lastLocal.date.monthNumber.toString().padStart(2, '0')
-    val day = lastLocal.date.dayOfMonth.toString().padStart(2, '0')
     val hour = lastLocal.hour.toString().padStart(2, '0')
     val minute = lastLocal.minute.toString().padStart(2, '0')
     val timePart = "$hour:$minute"
 
-    return "Last seen $year-$month-$day $timePart"
+    val yesterday = nowDate.minus(DatePeriod(days = 1))
+    val daysBetween = nowDate.toEpochDays() - lastDate.toEpochDays()
+
+    return when {
+        lastDate == nowDate -> "Last seen today at $timePart"
+        lastDate == yesterday -> "Last seen yesterday at $timePart"
+        daysBetween in 2..6 -> {
+            val label = lastDate.dayOfWeek.name
+                .lowercase()
+                .split("_")
+                .joinToString(" ") { word ->
+                    word.replaceFirstChar { c -> c.titlecase() }
+                }
+            "Last seen $label at $timePart"
+        }
+        lastDate.year == nowDate.year -> {
+            val mon = monthShortEn.getOrElse(lastDate.monthNumber - 1) { "" }
+            "Last seen ${lastDate.dayOfMonth} $mon at $timePart"
+        }
+        else -> {
+            val mon = monthShortEn.getOrElse(lastDate.monthNumber - 1) { "" }
+            "Last seen ${lastDate.dayOfMonth} $mon ${lastDate.year} at $timePart"
+        }
+    }
 }
 

app/shared/src/commonMain/sqldelight/ru/fromchat/db/MessageDatabase.sq

@@ -48,6 +48,10 @@ deleteMessagesForConversation:
 DELETE FROM message
 WHERE conversationId = ?;
 
+deleteMessageByClientMessageId:
+DELETE FROM message
+WHERE conversationId = ? AND clientMessageId = ?;
+
 upsertMessage:
 INSERT OR REPLACE INTO message(
     id,

app/shared/src/iosMain/kotlin/ru/fromchat/net/NetworkConnectivity.ios.kt

@@ -0,0 +1,17 @@
+package ru.fromchat.net
+
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.StateFlow
+import kotlinx.coroutines.flow.asStateFlow
+
+/**
+ * iOS: wired later to NWPathMonitor; default [true] avoids false "offline" when APIs are absent.
+ */
+actual object NetworkConnectivity {
+    private val _isOnline = MutableStateFlow(true)
+    actual val isOnline: StateFlow<Boolean> = _isOnline.asStateFlow()
+
+    actual fun ensureStarted() {
+        // No-op until native path monitoring is bound.
+    }
+}