Make everything more robust

app/shared/src/androidMain/kotlin/ru/fromchat/api/outbox/MediaUploadForegroundHelper.kt

@@ -12,6 +12,7 @@ import com.pr0gramm3r101.utils.UtilsLibrary
 import org.jetbrains.compose.resources.getString
 import ru.fromchat.Res
 import ru.fromchat.notif_media_upload_channel_name
+import ru.fromchat.notif_media_upload_percent
 import ru.fromchat.notif_media_upload_progress
 import ru.fromchat.notif_media_upload_text
 import ru.fromchat.notif_media_upload_title
@@ -30,9 +31,17 @@ object MediaUploadForegroundHelper {
         val defaultText = getString(Res.string.notif_media_upload_text)
         ensureChannel(context, channelName)
         val contentText = when {
-            percent != null && !filename.isNullOrBlank() ->
+            percent != null -> {
-                getString(Res.string.notif_media_upload_progress, percent.coerceIn(0, 100), filename)
+                val percentLabel = getString(
-            percent != null -> "$percent%"
+                    Res.string.notif_media_upload_percent,
+                    percent.coerceIn(0, 100),
+                )
+                if (!filename.isNullOrBlank()) {
+                    getString(Res.string.notif_media_upload_progress, percentLabel, filename)
+                } else {
+                    percentLabel
+                }
+            }
             else -> defaultText
         }
         val builder = NotificationCompat.Builder(context, CHANNEL_ID)

app/shared/src/androidMain/kotlin/ru/fromchat/ui/chat/AttachmentFileDownload.android.kt

@@ -0,0 +1,77 @@
+package ru.fromchat.ui.chat
+
+import android.app.Activity
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.os.Build
+import android.provider.DocumentsContract
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContract
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.remember
+import com.pr0gramm3r101.utils.UtilsLibrary
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+
+private class CreateFileInDownloadsContract : ActivityResultContract<Pair<String, String>, Uri?>() {
+    override fun createIntent(context: Context, input: Pair<String, String>): Intent {
+        val (filename, mimeType) = input
+        return Intent(Intent.ACTION_CREATE_DOCUMENT).apply {
+            addCategory(Intent.CATEGORY_OPENABLE)
+            type = mimeType
+            putExtra(Intent.EXTRA_TITLE, filename)
+            addFlags(Intent.FLAG_GRANT_PERSISTABLE_URI_PERMISSION)
+            addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION)
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                runCatching {
+                    putExtra(
+                        DocumentsContract.EXTRA_INITIAL_URI,
+                        DocumentsContract.buildDocumentUri(
+                            "com.android.externalstorage.documents",
+                            "primary:Download",
+                        ),
+                    )
+                }
+            }
+        }
+    }
+
+    override fun parseResult(resultCode: Int, intent: Intent?): Uri? {
+        if (resultCode != Activity.RESULT_OK || intent?.data == null) return null
+        return intent.data
+    }
+}
+
+@Composable
+actual fun rememberCreateDownloadDestinationLauncher(
+    onDestination: (String?) -> Unit,
+): (filename: String, mimeType: String) -> Unit {
+    val launcher = rememberLauncherForActivityResult(CreateFileInDownloadsContract()) { uri ->
+        if (uri == null) {
+            onDestination(null)
+            return@rememberLauncherForActivityResult
+        }
+        runCatching {
+            val flags = Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+            UtilsLibrary.context.contentResolver.takePersistableUriPermission(uri, flags)
+        }
+        onDestination(uri.toString())
+    }
+    return remember(launcher) {
+        { filename: String, mimeType: String ->
+            launcher.launch(filename to mimeType)
+        }
+    }
+}
+
+suspend fun persistExportUriPermission(exportUri: String) {
+    withContext(Dispatchers.IO) {
+        if (!exportUri.startsWith("content://")) return@withContext
+        runCatching {
+            val uri = Uri.parse(exportUri)
+            val flags = Intent.FLAG_GRANT_READ_URI_PERMISSION or Intent.FLAG_GRANT_WRITE_URI_PERMISSION
+            UtilsLibrary.context.contentResolver.takePersistableUriPermission(uri, flags)
+        }
+    }
+}

app/shared/src/androidMain/kotlin/ru/fromchat/ui/chat/DmFileDownloader.android.kt

@@ -0,0 +1,58 @@
+package ru.fromchat.ui.chat
+
+import android.content.Intent
+import android.net.Uri
+import com.pr0gramm3r101.utils.UtilsLibrary
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import java.io.File
+
+actual suspend fun writeBytesToExportUri(exportUri: String, bytes: ByteArray): Boolean =
+    withContext(Dispatchers.IO) {
+        runCatching {
+            val uri = Uri.parse(exportUri)
+            UtilsLibrary.context.contentResolver.openOutputStream(uri, "wt")?.use { out ->
+                out.write(bytes)
+            } != null
+        }.getOrDefault(false)
+    }
+
+actual suspend fun isExportUriAccessible(exportUri: String): Boolean = withContext(Dispatchers.IO) {
+    runCatching {
+        when {
+            exportUri.startsWith("content://") -> {
+                UtilsLibrary.context.contentResolver
+                    .openFileDescriptor(Uri.parse(exportUri), "r")
+                    ?.use { true } == true
+            }
+            exportUri.startsWith("file://") -> {
+                val path = Uri.parse(exportUri).path ?: return@runCatching false
+                File(path).isFile
+            }
+            else -> File(exportUri).isFile
+        }
+    }.getOrDefault(false)
+}
+
+actual fun openExportUri(exportUri: String, mimeType: String): Boolean {
+    val context = UtilsLibrary.context
+    val uri = Uri.parse(
+        when {
+            exportUri.startsWith("content://") || exportUri.startsWith("file://") -> exportUri
+            else -> "file://$exportUri"
+        },
+    )
+    if (uri.scheme == "file") {
+        val path = uri.path ?: return false
+        if (!File(path).isFile) return false
+    }
+    return runCatching {
+        val intent = Intent(Intent.ACTION_VIEW).apply {
+            setDataAndType(uri, mimeType)
+            addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
+            addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+        }
+        context.startActivity(Intent.createChooser(intent, null))
+        true
+    }.getOrDefault(false)
+}

app/shared/src/commonMain/composeResources/values-ru/strings.xml

@@ -82,7 +82,8 @@
     <string name="action_delete">Удалить</string>
     <string name="action_copy">Копировать</string>
     <string name="action_cancel_send">Отменить</string>
-    <string name="notif_media_upload_progress">%1$d%% · %2$s</string>
+    <string name="notif_media_upload_percent">%1$d\u0025</string>
+    <string name="notif_media_upload_progress">%1$s · %2$s</string>
     <string name="action_save">Сохранить</string>
     <string name="cd_close">Закрыть</string>
     <string name="cd_remove">Убрать</string>

app/shared/src/commonMain/composeResources/values/strings.xml

@@ -98,7 +98,8 @@
     <string name="action_copy">Copy</string>
     <string name="action_cancel_send">Cancel</string>
     <string name="action_save">Save</string>
-    <string name="notif_media_upload_progress">%1$d%% · %2$s</string>
+    <string name="notif_media_upload_percent">%1$d\u0025</string>
+    <string name="notif_media_upload_progress">%1$s · %2$s</string>
 
     <!-- Chat input -->
     <string name="cd_close">Close</string>

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

@@ -12,6 +12,7 @@ import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.launch
 import ru.fromchat.ui.chat.AttachmentMediaLog
 import ru.fromchat.ui.chat.DecryptedImageCache
+import ru.fromchat.ui.chat.DownloadedFileRegistry
 
 sealed class AttachmentDownloadProgress {
     data class InProgress(val storageKey: String, val percent: Int) : AttachmentDownloadProgress()
@@ -44,6 +45,7 @@ object AttachmentDownloadNotifier {
         messageId: Int = 0,
         fileIndex: Int = 0,
         clientMessageId: String? = null,
+        mirrorAsFileAttachment: Boolean = false,
     ) {
         val msg = AttachmentMediaLog.messageLabel(messageLabel)
         val primaryKey = when (progress) {
@@ -51,11 +53,12 @@ object AttachmentDownloadNotifier {
             is AttachmentDownloadProgress.Success -> progress.storageKey
             is AttachmentDownloadProgress.Failed -> progress.storageKey
         }
-        val mirrorKeys = DecryptedImageCache.progressLookupKeys(
+        val mirrorKeys = when {
-            messageId = messageId,
+            mirrorAsFileAttachment || primaryKey.startsWith("file_") ->
-            fileIndex = fileIndex,
+                DownloadedFileRegistry.progressLookupKeys(messageId, fileIndex, clientMessageId)
-            clientMessageId = clientMessageId,
+            else ->
-        ).ifEmpty { listOf(primaryKey) }
+                DecryptedImageCache.progressLookupKeys(messageId, fileIndex, clientMessageId)
+        }.ifEmpty { listOf(primaryKey) }
         when (progress) {
             is AttachmentDownloadProgress.InProgress -> {
                 if (progress.percent == 1 || progress.percent % 15 == 0 || progress.percent >= 95) {
@@ -105,13 +108,32 @@ object AttachmentDownloadNotifier {
         }
     }
 
-    fun clearProgress(messageId: Int, fileIndex: Int, clientMessageId: String? = null) {
+    fun clearProgress(
-        val keys = DecryptedImageCache.progressLookupKeys(messageId, fileIndex, clientMessageId).toSet()
+        messageId: Int,
+        fileIndex: Int,
+        clientMessageId: String? = null,
+        mirrorAsFileAttachment: Boolean = false,
+    ) {
+        val keys = if (mirrorAsFileAttachment) {
+            DownloadedFileRegistry.progressLookupKeys(messageId, fileIndex, clientMessageId)
+        } else {
+            DecryptedImageCache.progressLookupKeys(messageId, fileIndex, clientMessageId)
+        }.toSet()
         _progressPercentByKey.update { map -> map - keys }
         _failedKeys.update { failed -> failed - keys }
     }
 
-    fun isFailed(messageId: Int, fileIndex: Int, clientMessageId: String? = null): Boolean =
+    fun isFailed(
+        messageId: Int,
+        fileIndex: Int,
+        clientMessageId: String? = null,
+        mirrorAsFileAttachment: Boolean = false,
+    ): Boolean {
+        val keys = if (mirrorAsFileAttachment) {
+            DownloadedFileRegistry.progressLookupKeys(messageId, fileIndex, clientMessageId)
+        } else {
             DecryptedImageCache.progressLookupKeys(messageId, fileIndex, clientMessageId)
-            .any { it in _failedKeys.value }
+        }
+        return keys.any { it in _failedKeys.value }
+    }
 }

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

@@ -17,6 +17,14 @@ import ru.fromchat.ui.chat.DecryptedImageCache
 
 private val json = Json { ignoreUnknownKeys = true; encodeDefaults = true }
 
+@Serializable
+private data class PersistedOptimisticOutboundPayload(
+    @SerialName("text") val text: String,
+    @SerialName("pendingFileUri") val pendingFileUri: String? = null,
+    @SerialName("pendingFilename") val pendingFilename: String? = null,
+    @SerialName("uploadJobId") val uploadJobId: String? = null,
+)
+
 @Serializable
 private data class PersistedDmMessagePayload(
     @SerialName("text") val text: String,
@@ -39,8 +47,25 @@ data class ParsedDmMessageContent(
     val fileDimensions: List<Pair<Int, Int>>? = null,
     val isContentCorrupted: Boolean = false,
     val localPreviewUri: String? = null,
+    val pendingFileUri: String? = null,
+    val pendingFilename: String? = null,
+    val uploadJobId: String? = null,
 )
 
+/** Persists in-flight attachment fields so SQLDelight reload keeps the file row UI. */
+fun encodeOptimisticOutboundMessage(message: Message): String {
+    val pendingUri = message.pendingFileUri?.trim().orEmpty()
+    if (pendingUri.isEmpty()) return message.content
+    return json.encodeToString(
+        PersistedOptimisticOutboundPayload(
+            text = message.content,
+            pendingFileUri = pendingUri,
+            pendingFilename = message.pendingFilename?.trim()?.takeIf { it.isNotEmpty() },
+            uploadJobId = message.uploadJobId?.trim()?.takeIf { it.isNotEmpty() },
+        ),
+    )
+}
+
 fun resolveLocalPreviewUri(message: Message): String? {
     message.pendingFileUri?.takeIf { uri ->
         DecryptedImageCache.isDecryptedImageCacheUri(uri) && localPreviewFileExists(uri)
@@ -106,9 +131,21 @@ fun encodePersistedDmMessage(message: Message): String {
 fun parseDmMessageContent(plaintext: String): ParsedDmMessageContent {
     val trimmed = plaintext.trim()
     if (trimmed.startsWith("{")) {
-        val isPersistedEnvelope = runCatching {
+        val root = runCatching { json.parseToJsonElement(trimmed).jsonObject }.getOrNull()
-            json.parseToJsonElement(trimmed).jsonObject.containsKey("envelope")
+        if (root?.containsKey("pendingFileUri") == true) {
-        }.getOrDefault(false)
+            return runCatching {
+                val payload = json.decodeFromString<PersistedOptimisticOutboundPayload>(trimmed)
+                ParsedDmMessageContent(
+                    text = payload.text,
+                    pendingFileUri = payload.pendingFileUri?.takeIf { it.isNotBlank() },
+                    pendingFilename = payload.pendingFilename?.takeIf { it.isNotBlank() },
+                    uploadJobId = payload.uploadJobId?.takeIf { it.isNotBlank() },
+                )
+            }.getOrElse {
+                ParsedDmMessageContent(text = plaintext)
+            }
+        }
+        val isPersistedEnvelope = root?.containsKey("envelope") == true
         if (isPersistedEnvelope) {
             return runCatching {
                 val payload = json.decodeFromString<PersistedDmMessagePayload>(trimmed)

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

@@ -327,7 +327,7 @@ object MessageCacheStore {
                 id = msg.id.toLong(),
                 conversationId = conversationId,
                 userId = msg.user_id.toLong(),
-                content = msg.content,
+                content = storedMessageContent(msg),
                 timestamp = msg.timestamp,
                 isRead = if (msg.is_read) 1L else 0L,
                 isEdited = if (msg.is_edited) 1L else 0L,
@@ -533,7 +533,11 @@ object MessageCacheStore {
             isContentCorrupted = parsed.isContentCorrupted,
         )
         return base.copy(
-            pendingFileUri = parsed.localPreviewUri ?: resolveLocalPreviewUri(base),
+            pendingFileUri = parsed.pendingFileUri
+                ?: parsed.localPreviewUri
+                ?: resolveLocalPreviewUri(base),
+            pendingFilename = parsed.pendingFilename ?: base.pendingFilename,
+            uploadJobId = parsed.uploadJobId ?: base.uploadJobId,
             pendingFileAspectRatio = parsed.fileAspectRatios?.firstOrNull()
                 ?: parsed.fileDimensions?.firstOrNull()?.let { (w, h) ->
                     aspectRatioFromDimensionPair(w, h)
@@ -541,6 +545,12 @@ object MessageCacheStore {
         )
     }
 
+    private fun storedMessageContent(msg: Message): String = when {
+        msg.id < 0 -> encodeOptimisticOutboundMessage(msg)
+        !msg.files.isNullOrEmpty() && msg.dmEnvelope != null -> encodePersistedDmMessage(msg)
+        else -> msg.content
+    }
+
     suspend fun clearAll() {
         withContext(Dispatchers.Default) {
             db.messageDatabaseQueries.purgeAllCache()
@@ -572,12 +582,7 @@ object MessageCacheStore {
                         id = msg.id.toLong(),
                         conversationId = conversationId,
                         userId = msg.user_id.toLong(),
-                        content = when {
+                        content = storedMessageContent(msg),
-                            msg.id < 0 -> msg.content
-                            !msg.files.isNullOrEmpty() && msg.dmEnvelope != null ->
-                                encodePersistedDmMessage(msg)
-                            else -> msg.content
-                        },
                         timestamp = msg.timestamp,
                         isRead = if (msg.is_read) 1L else 0L,
                         isEdited = if (msg.is_edited) 1L else 0L,

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

@@ -0,0 +1,12 @@
+package ru.fromchat.ui.chat
+
+import androidx.compose.runtime.Composable
+
+/**
+ * Opens the platform "save as" UI (default Downloads). Invokes [onDestination] with a
+ * persistent export URI string, or null if cancelled.
+ */
+@Composable
+expect fun rememberCreateDownloadDestinationLauncher(
+    onDestination: (String?) -> Unit,
+): (filename: String, mimeType: String) -> Unit

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

@@ -0,0 +1,27 @@
+package ru.fromchat.ui.chat
+
+fun mimeTypeForFilename(filename: String): String {
+    val ext = filename.substringAfterLast('.').lowercase()
+    return when (ext) {
+        "png" -> "image/png"
+        "jpg", "jpeg" -> "image/jpeg"
+        "gif" -> "image/gif"
+        "webp" -> "image/webp"
+        "heic", "heif" -> "image/heic"
+        "bmp" -> "image/bmp"
+        "pdf" -> "application/pdf"
+        "zip" -> "application/zip"
+        "txt" -> "text/plain"
+        "json" -> "application/json"
+        "mp4" -> "video/mp4"
+        "mp3" -> "audio/mpeg"
+        "wav" -> "audio/wav"
+        "doc" -> "application/msword"
+        "docx" -> "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
+        "xls" -> "application/vnd.ms-excel"
+        "xlsx" -> "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"
+        "ppt" -> "application/vnd.ms-powerpoint"
+        "pptx" -> "application/vnd.openxmlformats-officedocument.presentationml.presentation"
+        else -> "application/octet-stream"
+    }
+}

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

@@ -29,6 +29,7 @@ import androidx.compose.foundation.shape.RoundedCornerShape
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.rounded.AttachFile
 import androidx.compose.material.icons.rounded.Download
+import androidx.compose.material.icons.rounded.InsertDriveFile
 import androidx.compose.material3.CircularProgressIndicator
 import androidx.compose.material3.CircularWavyProgressIndicator
 import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
@@ -113,7 +114,6 @@ fun AttachmentPreview(
     messageId: Int? = null,
     fileIndex: Int? = null,
     clientMessageId: String? = null,
-    onFileClick: (() -> Unit)? = null,
     onImageClick: (() -> Unit)? = null,
     onImageBounds: ((Rect) -> Unit)? = null,
     isExpanded: Boolean = false,
@@ -139,7 +139,7 @@ fun AttachmentPreview(
 
     when {
         (file != null && !isImage) || isPendingFile -> {
-            ExpressiveFileAttachmentRow(
+            ChatFileAttachmentTile(
                 filename = file?.name
                     ?: pendingFilename?.takeIf { it.isNotBlank() }
                     ?: pendingFileUri?.substringAfterLast("/")
@@ -147,11 +147,18 @@ fun AttachmentPreview(
                         ?.takeIf { it.isNotBlank() }
                     ?: "File",
                 sizeBytes = fileSizeBytes,
-                onClick = if (file != null) onFileClick else null,
+                messageId = messageId ?: -1,
+                fileIndex = fileIndex ?: 0,
+                clientMessageId = clientMessageId,
+                file = file,
+                dmEnvelope = dmEnvelope,
+                currentUserId = currentUserId,
+                pendingFileUri = if (isPendingFile) pendingFileUri else null,
                 isAuthor = isAuthor,
                 isUploading = isPendingFile && (isUploading || awaitingServerAck),
                 uploadProgress = if (isPendingFile) uploadProgress else null,
-                modifier = modifier
+                messageLabel = messageLabel,
+                modifier = modifier,
             )
         }
         showImageTile -> {
@@ -962,13 +969,14 @@ private fun formatFileSize(bytes: Long): String {
 
 @OptIn(ExperimentalMaterial3ExpressiveApi::class)
 @Composable
-private fun ExpressiveFileAttachmentRow(
+internal fun ExpressiveFileAttachmentRow(
     filename: String,
     sizeBytes: Long?,
     onClick: (() -> Unit)?,
     isAuthor: Boolean,
     isUploading: Boolean,
     uploadProgress: Int?,
+    isDownloaded: Boolean = false,
     modifier: Modifier = Modifier
 ) {
     val headlineColor = if (isAuthor) Color.White else MaterialTheme.colorScheme.onSurface
@@ -1022,7 +1030,11 @@ private fun ExpressiveFileAttachmentRow(
                         contentAlignment = Alignment.Center
                     ) {
                         Icon(
-                            imageVector = Icons.Rounded.Download,
+                            imageVector = if (isDownloaded) {
+                                Icons.Rounded.InsertDriveFile
+                            } else {
+                                Icons.Rounded.Download
+                            },
                             contentDescription = null,
                             modifier = Modifier.size(26.dp),
                             tint = if (isAuthor) {

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

@@ -0,0 +1,211 @@
+package ru.fromchat.ui.chat
+
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.widthIn
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.rounded.Download
+import androidx.compose.material.icons.rounded.InsertDriveFile
+import androidx.compose.material3.ExperimentalMaterial3ExpressiveApi
+import androidx.compose.material3.Icon
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.collectAsState
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
+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.unit.dp
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+import ru.fromchat.api.AttachmentDownloadNotifier
+import ru.fromchat.api.DmEnvelope
+import ru.fromchat.api.DmFile
+
+@OptIn(ExperimentalMaterial3ExpressiveApi::class)
+@Composable
+fun ChatFileAttachmentTile(
+    filename: String,
+    sizeBytes: Long?,
+    messageId: Int,
+    fileIndex: Int,
+    clientMessageId: String?,
+    file: DmFile?,
+    dmEnvelope: DmEnvelope?,
+    currentUserId: Int?,
+    pendingFileUri: String?,
+    isAuthor: Boolean,
+    isUploading: Boolean,
+    uploadProgress: Int?,
+    messageLabel: String? = null,
+    modifier: Modifier = Modifier,
+) {
+    val scope = rememberCoroutineScope()
+    val isPendingLocal = pendingFileUri != null && file == null
+    val mimeType = remember(filename) { mimeTypeForFilename(filename) }
+
+    var exportUri by remember(messageId, fileIndex, clientMessageId) {
+        mutableStateOf<String?>(null)
+    }
+    var uriAccessible by remember { mutableStateOf(false) }
+
+    LaunchedEffect(messageId, fileIndex, clientMessageId) {
+        val stored = DownloadedFileRegistry.getExportUri(messageId, fileIndex, clientMessageId)
+        exportUri = stored
+        uriAccessible = stored != null && isExportUriAccessible(stored)
+        if (stored != null && !uriAccessible) {
+            DownloadedFileRegistry.removeExportUri(messageId, fileIndex, clientMessageId)
+            exportUri = null
+            AttachmentDownloadNotifier.clearProgress(
+                messageId = messageId,
+                fileIndex = fileIndex,
+                clientMessageId = clientMessageId,
+                mirrorAsFileAttachment = true,
+            )
+        }
+    }
+
+    val downloadProgressByKey by AttachmentDownloadNotifier.progressPercentByKey.collectAsState()
+    val downloadProgress = remember(downloadProgressByKey, messageId, fileIndex, clientMessageId) {
+        DownloadedFileRegistry.resolveDownloadPercent(
+            messageId = messageId,
+            fileIndex = fileIndex,
+            clientMessageId = clientMessageId,
+            progressByKey = downloadProgressByKey,
+        )
+    }
+    val isDownloading = !isUploading &&
+        downloadProgress != null &&
+        downloadProgress < 100
+
+    var pendingDownload by remember { mutableStateOf<PendingFileDownload?>(null) }
+
+    val launchDestinationPicker = rememberCreateDownloadDestinationLauncher { destination ->
+        val pending = pendingDownload
+        pendingDownload = null
+        if (destination == null || pending == null) return@rememberCreateDownloadDestinationLauncher
+        scope.launch {
+            val ok = DmFileDownloader.downloadToExportUri(
+                messageId = pending.messageId,
+                fileIndex = pending.fileIndex,
+                file = pending.file,
+                envelope = pending.envelope,
+                currentUserId = pending.currentUserId,
+                clientMessageId = pending.clientMessageId,
+                exportUri = destination,
+                messageLabel = pending.messageLabel,
+            )
+            if (ok) {
+                uriAccessible = isExportUriAccessible(destination)
+                if (!uriAccessible) {
+                    DownloadedFileRegistry.removeExportUri(
+                        pending.messageId,
+                        pending.fileIndex,
+                        pending.clientMessageId,
+                    )
+                    exportUri = null
+                }
+            } else {
+                exportUri = null
+                uriAccessible = false
+            }
+        }
+    }
+
+    val isDownloaded = !isPendingLocal && uriAccessible && exportUri != null && !isDownloading
+    val showWavy = isUploading || isDownloading
+
+    val onRowClick: (() -> Unit)? = when {
+        isUploading -> null
+        isPendingLocal && pendingFileUri != null -> {
+            {
+                scope.launch {
+                    withContext(Dispatchers.Default) {
+                        openExportUri(pendingFileUri, mimeType)
+                    }
+                }
+            }
+        }
+        isDownloaded && exportUri != null -> {
+            {
+                scope.launch {
+                    val accessible = isExportUriAccessible(exportUri!!)
+                    if (!accessible) {
+                        DownloadedFileRegistry.removeExportUri(messageId, fileIndex, clientMessageId)
+                        exportUri = null
+                        uriAccessible = false
+                        AttachmentDownloadNotifier.clearProgress(
+                            messageId = messageId,
+                            fileIndex = fileIndex,
+                            clientMessageId = clientMessageId,
+                            mirrorAsFileAttachment = true,
+                        )
+                        return@launch
+                    }
+                    withContext(Dispatchers.Default) {
+                        if (!openExportUri(exportUri!!, mimeType)) {
+                            DownloadedFileRegistry.removeExportUri(messageId, fileIndex, clientMessageId)
+                            exportUri = null
+                            uriAccessible = false
+                        }
+                    }
+                }
+            }
+        }
+        file != null && dmEnvelope != null && !isDownloading -> {
+            {
+                pendingDownload = PendingFileDownload(
+                    messageId = messageId,
+                    fileIndex = fileIndex,
+                    file = file,
+                    envelope = dmEnvelope,
+                    currentUserId = currentUserId,
+                    clientMessageId = clientMessageId,
+                    messageLabel = messageLabel,
+                )
+                launchDestinationPicker(filename, mimeType)
+            }
+        }
+        else -> null
+    }
+
+  ExpressiveFileAttachmentRow(
+        filename = filename,
+        sizeBytes = sizeBytes,
+        onClick = onRowClick,
+        isAuthor = isAuthor,
+        isUploading = showWavy,
+        uploadProgress = when {
+            isUploading -> uploadProgress
+            isDownloading -> downloadProgress
+            else -> null
+        },
+        isDownloaded = isDownloaded,
+        modifier = modifier,
+    )
+}
+
+private data class PendingFileDownload(
+    val messageId: Int,
+    val fileIndex: Int,
+    val file: DmFile,
+    val envelope: DmEnvelope,
+    val currentUserId: Int?,
+    val clientMessageId: String?,
+    val messageLabel: String?,
+)

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

@@ -403,12 +403,12 @@ fun ChatScreen(
             contextMenuState = contextMenuState.copy(isOpen = false, message = null)
             return@LaunchedEffect
         }
-        val menuAuthor = menuMessage.user_id == currentUserId
         val liveAuthor = liveMessage.user_id == currentUserId
-        val menuFp = messageContextMenuFingerprint(menuMessage, menuAuthor, isReadOnly)
         val liveFp = messageContextMenuFingerprint(liveMessage, liveAuthor, isReadOnly)
-        if (menuFp != liveFp) {
+        val menuAuthor = menuMessage.user_id == currentUserId
-            contextMenuState = contextMenuState.copy(isOpen = false, message = null)
+        val menuFp = messageContextMenuFingerprint(menuMessage, menuAuthor, isReadOnly)
+        if (menuFp != liveFp || liveMessage.id != menuMessage.id) {
+            contextMenuState = contextMenuState.copy(message = liveMessage)
         }
     }
 
@@ -502,7 +502,10 @@ fun ChatScreen(
                                                         aspectRatio = aspectRatio,
                                                     )
                                                 } else {
-                                                    null
+                                                    prepareOutboundFileForSend(
+                                                        clientMessageId = jobId,
+                                                        sourceUri = att.uri,
+                                                    )
                                                 }
                                                 val fileUri = staged?.stagedUri ?: att.uri
                                                 val optimisticMessage = Message(
@@ -522,14 +525,14 @@ fun ChatScreen(
                                                     pendingFileUri = fileUri,
                                                     pendingFilename = att.filename,
                                                     uploadJobId = jobId,
-                                                    uploadProgress = if (isImage) 0 else null,
+                                                    uploadProgress = 0,
                                                     pendingFileAspectRatio = staged?.aspectRatio ?: aspectRatio,
                                                     fileDimensions = imageDimensions?.let { listOf(it) },
                                                 )
                                                 withContext(Dispatchers.Main) {
                                                     panel.addMessage(optimisticMessage)
                                                 }
-                                                if (isImage && staged == null) {
+                                                if (staged == null) {
                                                     withContext(Dispatchers.Main) {
                                                         panel.cancelQueuedMessageByClientId(jobId)
                                                     }
@@ -626,7 +629,15 @@ fun ChatScreen(
                                 message = message,
                                 isAuthor = message.user_id == currentUserId,
                                 isContextMenuOpen = contextMenuState.isOpen,
-                                isContextMenuForThisMessage = contextMenuState.isOpen && contextMenuState.message?.id == message.id,
+                                isContextMenuForThisMessage = contextMenuState.isOpen && run {
+                                    val menu = contextMenuState.message ?: return@run false
+                                    val cid = menu.client_message_id?.trim().orEmpty()
+                                    if (cid.isNotEmpty()) {
+                                        message.client_message_id?.trim() == cid
+                                    } else {
+                                        menu.id == message.id
+                                    }
+                                },
                                 onLongPress = {
                                     if (isReadOnly) {
                                         return@MessageItem

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

@@ -0,0 +1,112 @@
+package ru.fromchat.ui.chat
+
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.NonCancellable
+import kotlinx.coroutines.withContext
+import ru.fromchat.api.ApiClient
+import ru.fromchat.api.AttachmentDownloadNotifier
+import ru.fromchat.api.AttachmentDownloadProgress
+import ru.fromchat.api.DmEnvelope
+import ru.fromchat.api.DmFile
+import ru.fromchat.crypto.decryptFile
+
+object DmFileDownloader {
+    suspend fun downloadToExportUri(
+        messageId: Int,
+        fileIndex: Int,
+        file: DmFile,
+        envelope: DmEnvelope,
+        currentUserId: Int?,
+        clientMessageId: String?,
+        exportUri: String,
+        messageLabel: String? = null,
+    ): Boolean {
+        val key = DownloadedFileRegistry.storageKey(messageId, fileIndex, clientMessageId)
+        val label = AttachmentMediaLog.messageLabel(messageLabel)
+        return withContext(Dispatchers.Default + NonCancellable) {
+            runCatching {
+                val written = AttachmentDownloadScheduler.run(storageKey = key, messageId = messageId) {
+                    AttachmentDownloadNotifier.emit(
+                        AttachmentDownloadProgress.InProgress(key, 1),
+                        messageLabel = label,
+                        messageId = messageId,
+                        fileIndex = fileIndex,
+                        clientMessageId = clientMessageId,
+                        mirrorAsFileAttachment = true,
+                    )
+                    val bytes = decryptFile(
+                        file = file,
+                        envelope = envelope,
+                        currentUserId = currentUserId,
+                        downloadResumeKey = key,
+                        onDownloadProgress = { percent ->
+                            AttachmentDownloadNotifier.emit(
+                                AttachmentDownloadProgress.InProgress(key, percent.coerceIn(0, 100)),
+                                messageLabel = label,
+                                messageId = messageId,
+                                fileIndex = fileIndex,
+                                clientMessageId = clientMessageId,
+                                mirrorAsFileAttachment = true,
+                            )
+                        },
+                    )
+                    AttachmentDownloadNotifier.emit(
+                        AttachmentDownloadProgress.InProgress(key, 99),
+                        messageLabel = label,
+                        messageId = messageId,
+                        fileIndex = fileIndex,
+                        clientMessageId = clientMessageId,
+                        mirrorAsFileAttachment = true,
+                    )
+                    if (!writeBytesToExportUri(exportUri, bytes)) {
+                        ApiClient.clearPartialEncryptedDownload(key)
+                        AttachmentDownloadNotifier.emit(
+                            AttachmentDownloadProgress.Failed(key, "write_failed"),
+                            messageLabel = label,
+                            messageId = messageId,
+                            fileIndex = fileIndex,
+                            clientMessageId = clientMessageId,
+                            mirrorAsFileAttachment = true,
+                        )
+                        return@run null
+                    }
+                    DownloadedFileRegistry.setExportUri(
+                        messageId = messageId,
+                        fileIndex = fileIndex,
+                        clientMessageId = clientMessageId,
+                        exportUri = exportUri,
+                    )
+                    AttachmentDownloadNotifier.emit(
+                        AttachmentDownloadProgress.Success(storageKey = key, messageId = messageId),
+                        messageLabel = label,
+                        messageId = messageId,
+                        fileIndex = fileIndex,
+                        clientMessageId = clientMessageId,
+                        mirrorAsFileAttachment = true,
+                    )
+                    exportUri
+                }
+                written != null
+            }.onFailure { error ->
+                ApiClient.clearPartialEncryptedDownload(key)
+                AttachmentDownloadNotifier.emit(
+                    AttachmentDownloadProgress.Failed(
+                        storageKey = key,
+                        error = error.message ?: "download_failed",
+                    ),
+                    messageLabel = label,
+                    messageId = messageId,
+                    fileIndex = fileIndex,
+                    clientMessageId = clientMessageId,
+                    mirrorAsFileAttachment = true,
+                )
+            }.getOrDefault(false)
+        }
+    }
+}
+
+expect suspend fun writeBytesToExportUri(exportUri: String, bytes: ByteArray): Boolean
+
+expect suspend fun isExportUriAccessible(exportUri: String): Boolean
+
+expect fun openExportUri(exportUri: String, mimeType: String): Boolean

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

@@ -0,0 +1,158 @@
+package ru.fromchat.ui.chat
+
+import com.pr0gramm3r101.utils.files.PlatformFileSystem
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import kotlinx.coroutines.withContext
+import kotlinx.serialization.encodeToString
+import kotlinx.serialization.json.Json
+import ru.fromchat.core.cache.CacheContext
+import ru.fromchat.core.cache.readOutboundFileBytes
+
+/**
+ * Maps DM file attachment slots to a user-chosen export URI (SAF / document picker).
+ * Does not store file bytes — only the destination the user selected.
+ */
+object DownloadedFileRegistry {
+    private const val INDEX_FILE = "downloaded_exports.json"
+    private val json = Json { ignoreUnknownKeys = true }
+    private val mutex = Mutex()
+    private val memory = mutableMapOf<String, String>()
+    private var diskIndexLoaded = false
+
+    fun storageKey(
+        messageId: Int,
+        fileIndex: Int,
+        clientMessageId: String? = null,
+    ): String {
+        if (messageId > 0) return "file_${messageId}_$fileIndex"
+        val cid = clientMessageId?.trim()?.takeIf { it.isNotEmpty() }
+        return if (cid != null) {
+            "file_c_${sanitizeKeyPart(cid)}_$fileIndex"
+        } else {
+            "file_${messageId}_$fileIndex"
+        }
+    }
+
+    fun progressLookupKeys(
+        messageId: Int,
+        fileIndex: Int,
+        clientMessageId: String? = null,
+    ): List<String> = buildList {
+        add(storageKey(messageId, fileIndex, clientMessageId))
+        if (messageId > 0) add("file_${messageId}_$fileIndex")
+        val cid = clientMessageId?.trim()?.takeIf { it.isNotEmpty() }
+        if (cid != null) add("file_c_${sanitizeKeyPart(cid)}_$fileIndex")
+    }.distinct()
+
+    fun resolveDownloadPercent(
+        messageId: Int,
+        fileIndex: Int,
+        clientMessageId: String? = null,
+        progressByKey: Map<String, Int> = emptyMap(),
+    ): Int? {
+        for (lookupKey in progressLookupKeys(messageId, fileIndex, clientMessageId)) {
+            progressByKey[lookupKey]?.let { return it }
+        }
+        return null
+    }
+
+    suspend fun getExportUri(
+        messageId: Int,
+        fileIndex: Int,
+        clientMessageId: String? = null,
+    ): String? {
+        ensureDiskIndexLoaded()
+        return mutex.withLock {
+            memory[storageKey(messageId, fileIndex, clientMessageId)]
+        }
+    }
+
+    suspend fun setExportUri(
+        messageId: Int,
+        fileIndex: Int,
+        clientMessageId: String? = null,
+        exportUri: String,
+    ) {
+        ensureDiskIndexLoaded()
+        mutex.withLock {
+            val key = storageKey(messageId, fileIndex, clientMessageId)
+            memory[key] = exportUri
+            saveIndexLocked(memory)
+        }
+    }
+
+    suspend fun removeExportUri(
+        messageId: Int,
+        fileIndex: Int,
+        clientMessageId: String? = null,
+    ) {
+        ensureDiskIndexLoaded()
+        mutex.withLock {
+            val key = storageKey(messageId, fileIndex, clientMessageId)
+            memory.remove(key)
+            saveIndexLocked(memory)
+        }
+    }
+
+    suspend fun invalidateForMessage(messageId: Int) {
+        ensureDiskIndexLoaded()
+        mutex.withLock {
+            val prefix = "file_${messageId}_"
+            memory.keys.removeAll { it.startsWith(prefix) }
+            saveIndexLocked(memory)
+        }
+    }
+
+    suspend fun invalidateForClientMessage(clientMessageId: String) {
+        ensureDiskIndexLoaded()
+        mutex.withLock {
+            val prefix = "file_c_${sanitizeKeyPart(clientMessageId.trim())}_"
+            memory.keys.removeAll { it.startsWith(prefix) }
+            saveIndexLocked(memory)
+        }
+    }
+
+    private suspend fun ensureDiskIndexLoaded() {
+        if (diskIndexLoaded) return
+        val index = withContext(Dispatchers.Default) { readIndexFromDisk() }
+        mutex.withLock {
+            if (!diskIndexLoaded) {
+                memory.putAll(index)
+                diskIndexLoaded = true
+            }
+        }
+    }
+
+    private fun sanitizeKeyPart(value: String): String =
+        value.replace(Regex("[^a-zA-Z0-9._-]"), "_")
+
+    private fun indexPath(): String? {
+        val base = PlatformFileSystem.getAppCacheDirectory()
+        if (base.isEmpty()) return null
+        val instanceId = runCatching { CacheContext.requireActiveInstanceId() }.getOrNull() ?: "default"
+        val safe = instanceId.replace(Regex("[^a-zA-Z0-9._-]"), "_")
+        val dir = "$base/fromchat/instances/$safe"
+        PlatformFileSystem.ensureDirectory(dir)
+        return "$dir/$INDEX_FILE"
+    }
+
+    private suspend fun readIndexFromDisk(): Map<String, String> {
+        val path = indexPath() ?: return emptyMap()
+        if (!PlatformFileSystem.exists(path)) return emptyMap()
+        val bytes = runCatching {
+            readOutboundFileBytes("file://$path")
+        }.getOrNull() ?: return emptyMap()
+        if (bytes.isEmpty()) return emptyMap()
+        return runCatching {
+            json.decodeFromString<Map<String, String>>(bytes.decodeToString())
+        }.getOrDefault(emptyMap())
+    }
+
+    private fun saveIndexLocked(index: Map<String, String>) {
+        val path = indexPath() ?: return
+        val bytes = json.encodeToString(index).encodeToByteArray()
+        PlatformFileSystem.writeBytes(path, bytes)
+    }
+}

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

@@ -16,17 +16,7 @@ data class SavableMessageImage(
     val mimeType: String,
 )
 
-fun mimeTypeForImageFilename(filename: String): String {
+fun mimeTypeForImageFilename(filename: String): String = mimeTypeForFilename(filename)
-    val ext = filename.substringAfterLast('.').lowercase()
-    return when (ext) {
-        "png" -> "image/png"
-        "gif" -> "image/gif"
-        "webp" -> "image/webp"
-        "heic", "heif" -> "image/heic"
-        "bmp" -> "image/bmp"
-        else -> "image/jpeg"
-    }
-}
 
 /** Local decrypted (or staged) image ready to copy to user storage. */
 fun isMessageImageFullyLoaded(message: Message, fileIndex: Int): Boolean {

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

@@ -202,6 +202,9 @@ fun MessageItem(
                     )
                     else -> false
                 }
+                val pendingHasOutboundFile = message.pendingFileUri != null &&
+                    message.files.isNullOrEmpty() &&
+                    !pendingIsImage
                 val firstContentIsImage = (
                     !showUsername || isAuthor
                 ) && message.reply_to == null && (
@@ -418,6 +421,8 @@ fun MessageItem(
                             val primaryFile = message.files?.firstOrNull()
                             val primaryIsImage = primaryFile != null && isImageFilename(primaryFile.name)
                             val showPrimaryImageSlot = pendingIsImage || primaryIsImage
+                            val showPrimaryFileSlot = pendingHasOutboundFile ||
+                                (primaryFile != null && !primaryIsImage)
                             if (showPrimaryImageSlot) {
                                 val imageKey = imageAttachmentKey(message, 0)
                                 val awaitingServer = message.id < 0 && message.files.isNullOrEmpty()
@@ -448,7 +453,6 @@ fun MessageItem(
                                     messageId = message.id,
                                     fileIndex = 0,
                                     clientMessageId = message.client_message_id,
-                                    onFileClick = null,
                                     onImageClick = { onImageClick?.invoke(message, 0) },
                                     onImageBounds = if (onImageBounds != null) {
                                         { rect -> onImageBounds.invoke(imageKey, rect) }
@@ -467,10 +471,36 @@ fun MessageItem(
                                     }
                                 )
                             }
+                            if (showPrimaryFileSlot) {
+                                val awaitingServer = message.id < 0 && message.files.isNullOrEmpty()
+                                val isOutboundPendingFile = awaitingServer && pendingHasOutboundFile
+                                val awaitingServerAck = isOutboundPendingFile &&
+                                    message.uploadProgress == null
+                                AttachmentPreview(
+                                    file = primaryFile,
+                                    dmEnvelope = message.dmEnvelope,
+                                    currentUserId = currentUserId,
+                                    pendingFileUri = message.pendingFileUri,
+                                    pendingFilename = message.pendingFilename,
+                                    isUploading = isOutboundPendingFile,
+                                    awaitingServerAck = awaitingServerAck,
+                                    uploadProgress = message.uploadProgress,
+                                    fileSizeBytes = message.fileSizes?.firstOrNull(),
+                                    messageId = message.id,
+                                    fileIndex = 0,
+                                    clientMessageId = message.client_message_id,
+                                    isAuthor = isAuthor,
+                                    messageLabel = message.content,
+                                    modifier = Modifier.padding(horizontal = 12.dp, vertical = 4.dp),
+                                )
+                            }
                             message.files?.forEachIndexed { index, file ->
                                 if (index == 0 && showPrimaryImageSlot && isImageFilename(file.name)) {
                                     return@forEachIndexed
                                 }
+                                if (index == 0 && showPrimaryFileSlot && !isImageFilename(file.name)) {
+                                    return@forEachIndexed
+                                }
                                 val isImage = isImageFilename(file.name)
                                 val imageKey = if (isImage) imageAttachmentKey(message, index) else null
                                 val isFirstImage = index == 0 && isImage
@@ -492,10 +522,9 @@ fun MessageItem(
                                             DecryptedImageCache.isDecryptedImageCacheUri(message.pendingFileUri),
                                     ),
                                     fileSizeBytes = message.fileSizes?.getOrNull(index),
-                                    messageId = if (isImage) message.id else null,
+                                    messageId = message.id,
-                                    fileIndex = if (isImage) index else null,
+                                    fileIndex = index,
                                     clientMessageId = message.client_message_id,
-                                    onFileClick = null,
                                     onImageClick = if (isImage) { { onImageClick?.invoke(message, index) } } else null,
                                     onImageBounds = if (isImage && imageKey != null && onImageBounds != null) {
                                         { rect -> onImageBounds.invoke(imageKey, rect) }
@@ -515,7 +544,6 @@ fun MessageItem(
                             }
                         }
                         val hideFilenamePlaceholderCaption = message.pendingFileUri != null &&
-                            pendingIsImage &&
                             message.files.isNullOrEmpty() &&
                             message.pendingFilename != null &&
                             message.content == message.pendingFilename

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

@@ -50,6 +50,7 @@ internal fun mergeMessageUiFields(db: Message, panel: Message?): Message {
             else -> panel.pendingFileUri ?: db.pendingFileUri
         },
         pendingFilename = if (confirmed) null else panel.pendingFilename ?: db.pendingFilename,
+        uploadJobId = if (confirmed) null else panel.uploadJobId ?: db.uploadJobId,
         pendingFileAspectRatio = if (confirmed) {
             db.fileDimensions?.firstOrNull()?.let { (w, h) -> aspectRatioFromDimensionPair(w, h) }
                 ?: db.fileAspectRatios?.firstOrNull()
@@ -57,7 +58,6 @@ internal fun mergeMessageUiFields(db: Message, panel: Message?): Message {
         } else {
             panel.pendingFileAspectRatio ?: db.pendingFileAspectRatio
         },
-        uploadJobId = if (confirmed) null else panel.uploadJobId ?: db.uploadJobId,
         uploadProgress = if (confirmed) null else panel.uploadProgress ?: db.uploadProgress,
         files = db.files ?: panel.files,
         dmEnvelope = db.dmEnvelope ?: panel.dmEnvelope,

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

@@ -0,0 +1,21 @@
+package ru.fromchat.ui.chat
+
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import ru.fromchat.core.cache.CacheContext
+import ru.fromchat.core.cache.stageOutboundFileForUpload
+
+/**
+ * Copy a non-image attachment into instance upload storage (same pipeline as images).
+ */
+suspend fun prepareOutboundFileForSend(
+    clientMessageId: String,
+    sourceUri: String,
+): StagedOutboundPreview? = withContext(Dispatchers.Default) {
+    val instanceId = runCatching { CacheContext.requireActiveInstanceId() }.getOrNull() ?: return@withContext null
+    val staged = runCatching {
+        stageOutboundFileForUpload(instanceId, clientMessageId, sourceUri)
+    }.getOrNull() ?: return@withContext null
+    if (staged.sizeBytes <= 0L) return@withContext null
+    StagedOutboundPreview(stagedUri = staged.uri, aspectRatio = null)
+}

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

@@ -38,6 +38,7 @@ import ru.fromchat.crypto.decryptEnvelope
 import ru.fromchat.ui.chat.AvatarInfo
 import ru.fromchat.ui.chat.ChatPanel
 import ru.fromchat.ui.chat.DecryptedImageCache
+import ru.fromchat.ui.chat.DownloadedFileRegistry
 import ru.fromchat.ui.chat.DmTypingHandler
 import ru.fromchat.ui.chat.TypingHandler
 import ru.fromchat.ui.chat.dedupeMessagesByClientId
@@ -290,11 +291,6 @@ class DmPanel(
                     }
                     if (hasOptimistic) {
                         mergeConfirmedOwnMessage(envelope, outcome.plaintext, outcome.isCorrupted)
-                        if (envelope.replyToId != null) {
-                            val replyTo = _state.messages.find { it.id == envelope.replyToId }
-                            updateMessage(envelope.id) { it.copy(reply_to = replyTo) }
-                        }
-                        MessageCacheStore.replaceDmMessages(otherUserId, _state.messages)
                         return@withLock
                     }
                 }
@@ -305,16 +301,17 @@ class DmPanel(
                     mergeConfirmedOwnMessage(envelope, outcome.plaintext, outcome.isCorrupted)
                 } else {
                     addMessage(createMessage(envelope, outcome.plaintext, outcome.isCorrupted))
-                }
                     if (envelope.replyToId != null) {
                         val replyTo = _state.messages.find { it.id == envelope.replyToId }
                         updateMessage(envelope.id) { it.copy(reply_to = replyTo) }
                     }
-
+                    scope.launch(Dispatchers.Default) {
                         MessageCacheStore.replaceDmMessages(otherUserId, _state.messages)
                     }
                 }
             }
+        }
+    }
 
     private fun mergeConfirmedOwnMessage(envelope: DmEnvelope, plaintext: String, isContentCorrupted: Boolean) {
         val confirmed = createMessage(envelope, plaintext, isContentCorrupted)
@@ -400,7 +397,12 @@ class DmPanel(
                         }
                         else -> currentState.messages + merged
                     }
-                    currentState.copy(messages = dedupeMessagesByClientId(newMessages))
+                    val deduped = dedupeMessagesByClientId(newMessages)
+                    currentState.copy(messages = deduped)
+                }
+                if (envelope.replyToId != null) {
+                    val replyTo = _state.messages.find { it.id == envelope.replyToId }
+                    updateMessage(envelope.id) { it.copy(reply_to = replyTo) }
                 }
             }
 
@@ -408,6 +410,8 @@ class DmPanel(
                 MessageCacheStore.confirmDmMessage(otherUserId, cid, mergedForPersistence)
                 OutgoingMessageCoordinator.clearAttachmentOutboxAfterAck(cid)
             }
+            val snapshot = _state.messages
+            MessageCacheStore.replaceDmMessages(otherUserId, snapshot)
         }
     }
 
@@ -420,8 +424,10 @@ class DmPanel(
             val previous = _state.messages.find { it.id == envelope.id }
             val filesChanged = previous?.files != envelope.files
             if (filesChanged) {
+                DownloadedFileRegistry.invalidateForMessage(envelope.id)
                 DecryptedImageCache.invalidateForMessage(envelope.id)
                 envelope.clientMessageId?.trim()?.takeIf { it.isNotEmpty() }?.let {
+                    DownloadedFileRegistry.invalidateForClientMessage(it)
                     DecryptedImageCache.invalidateForClientMessage(it)
                 }
             }
@@ -492,8 +498,10 @@ class DmPanel(
         }
         val clientId = _state.messages.find { it.id == messageId }?.client_message_id
         deleteMessageImmediately(messageId)
+        DownloadedFileRegistry.invalidateForMessage(messageId)
         DecryptedImageCache.invalidateForMessage(messageId)
         clientId?.trim()?.takeIf { it.isNotEmpty() }?.let {
+            DownloadedFileRegistry.invalidateForClientMessage(it)
             DecryptedImageCache.invalidateForClientMessage(it)
         }
         runCatching { ApiClient.deleteDm(messageId, otherUserId) }
@@ -513,8 +521,10 @@ class DmPanel(
         if (!involvesPeer) return
         scope.launch(Dispatchers.Default) {
             val clientId = _state.messages.find { it.id == data.id }?.client_message_id
+            DownloadedFileRegistry.invalidateForMessage(data.id)
             DecryptedImageCache.invalidateForMessage(data.id)
             clientId?.trim()?.takeIf { it.isNotEmpty() }?.let {
+                DownloadedFileRegistry.invalidateForClientMessage(it)
                 DecryptedImageCache.invalidateForClientMessage(it)
             }
             deleteMessageImmediately(data.id)

app/shared/src/iosMain/kotlin/ru/fromchat/ui/chat/AttachmentFileDownload.ios.kt

@@ -0,0 +1,118 @@
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
+
+package ru.fromchat.ui.chat
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import kotlinx.cinterop.ExperimentalForeignApi
+import kotlinx.cinterop.addressOf
+import kotlinx.cinterop.usePinned
+import platform.Foundation.NSData
+import platform.Foundation.NSFileManager
+import platform.Foundation.NSSearchPathForDirectoriesInDomains
+import platform.Foundation.NSURL
+import platform.Foundation.NSUserDomainMask
+import platform.Foundation.create
+import platform.Foundation.writeToFile
+import platform.UIKit.UIDocumentPickerDelegateProtocol
+import platform.UIKit.UIDocumentPickerViewController
+import platform.darwin.NSObject
+import ru.fromchat.platform.iosTopViewController
+
+@Composable
+actual fun rememberCreateDownloadDestinationLauncher(
+    onDestination: (String?) -> Unit,
+): (filename: String, mimeType: String) -> Unit {
+    var activeDelegate by remember { mutableStateOf<SaveDestinationPickerDelegate?>(null) }
+
+    val launcher: (String, String) -> Unit = launcher@{ filename, _ ->
+        val host = iosTopViewController()
+        if (host == null) {
+            onDestination(null)
+            return@launcher
+        }
+        val stagingPath = writePickerStagingPlaceholder(filename)
+        if (stagingPath == null) {
+            onDestination(null)
+            return@launcher
+        }
+        val fileUrl = NSURL.fileURLWithPath(stagingPath)
+        val picker = UIDocumentPickerViewController(
+            forExportingURLs = listOf(fileUrl),
+            asCopy = true,
+        )
+        defaultDownloadsDirectoryUrl()?.let { picker.directoryURL = it }
+        val delegate = SaveDestinationPickerDelegate(stagingPath) { uri ->
+            activeDelegate = null
+            onDestination(uri)
+        }
+        activeDelegate = delegate
+        picker.delegate = delegate
+        host.presentViewController(picker, animated = true, completion = null)
+    }
+    return remember(onDestination) { launcher }
+}
+
+private fun defaultDownloadsDirectoryUrl(): NSURL? {
+    val manager = NSFileManager.defaultManager
+    return manager.URLForDirectory(
+        platform.Foundation.NSDownloadsDirectory,
+        NSUserDomainMask,
+        null,
+        false,
+        null,
+    ) ?: manager.URLForDirectory(
+        platform.Foundation.NSDocumentDirectory,
+        NSUserDomainMask,
+        null,
+        false,
+        null,
+    )
+}
+
+@OptIn(ExperimentalForeignApi::class)
+private fun writePickerStagingPlaceholder(filename: String): String? {
+    val caches = NSSearchPathForDirectoriesInDomains(
+        platform.Foundation.NSCachesDirectory,
+        NSUserDomainMask,
+        true,
+    ).filterIsInstance<String>().firstOrNull().orEmpty()
+    val dir = "$caches/save_export_pick"
+    NSFileManager.defaultManager.createDirectoryAtPath(dir, true, null, null)
+    val path = "$dir/${sanitizeExportFilename(filename)}"
+    val placeholder = ByteArray(0)
+    val nsData = placeholder.usePinned { pinned ->
+        NSData.create(bytes = pinned.addressOf(0), length = 0u)
+    } ?: return null
+    return if (nsData.writeToFile(path, true)) path else null
+}
+
+private class SaveDestinationPickerDelegate(
+    private val stagingPath: String,
+    private val onFinished: (String?) -> Unit,
+) : NSObject(), UIDocumentPickerDelegateProtocol {
+
+    private var finished = false
+
+    private fun finish(uri: String?) {
+        if (finished) return
+        finished = true
+        NSFileManager.defaultManager.removeItemAtPath(stagingPath, null)
+        onFinished(uri)
+    }
+
+    override fun documentPicker(
+        controller: UIDocumentPickerViewController,
+        didPickDocumentsAtURLs: List<*>,
+    ) {
+        val url = didPickDocumentsAtURLs.firstOrNull() as? NSURL
+        finish(url?.absoluteString)
+    }
+
+    override fun documentPickerWasCancelled(controller: UIDocumentPickerViewController) {
+        finish(null)
+    }
+}

app/shared/src/iosMain/kotlin/ru/fromchat/ui/chat/DmFileDownloader.ios.kt

@@ -0,0 +1,46 @@
+@file:OptIn(kotlinx.cinterop.ExperimentalForeignApi::class)
+
+package ru.fromchat.ui.chat
+
+import kotlinx.cinterop.ExperimentalForeignApi
+import kotlinx.cinterop.addressOf
+import kotlinx.cinterop.usePinned
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.withContext
+import platform.Foundation.NSData
+import platform.Foundation.NSFileManager
+import platform.Foundation.NSURL
+import platform.Foundation.create
+import platform.Foundation.writeToFile
+import platform.Foundation.writeToURL
+import platform.UIKit.UIApplication
+import ru.fromchat.platform.iosTopViewController
+
+actual suspend fun writeBytesToExportUri(exportUri: String, bytes: ByteArray): Boolean =
+    withContext(Dispatchers.Default) {
+        val url = NSURL.URLWithString(exportUri) ?: NSURL.fileURLWithPath(exportUri.removePrefix("file://"))
+        val nsData = bytes.usePinned { pinned ->
+            NSData.create(bytes = pinned.addressOf(0), length = bytes.size.toULong())
+        } ?: return@withContext false
+        nsData.writeToURL(url, true) || run {
+            val path = url.path ?: return@withContext false
+            nsData.writeToFile(path, true)
+        }
+    }
+
+actual suspend fun isExportUriAccessible(exportUri: String): Boolean = withContext(Dispatchers.Default) {
+    val url = NSURL.URLWithString(exportUri) ?: NSURL.fileURLWithPath(exportUri.removePrefix("file://"))
+    val path = url.path
+    if (path != null) {
+        return@withContext NSFileManager.defaultManager.fileExistsAtPath(path)
+    }
+    runCatching {
+        NSFileManager.defaultManager.isReadableFileAtPath(url.absoluteString ?: return@runCatching false)
+    }.getOrDefault(false)
+}
+
+actual fun openExportUri(exportUri: String, mimeType: String): Boolean {
+    val url = NSURL.URLWithString(exportUri) ?: NSURL.fileURLWithPath(exportUri.removePrefix("file://"))
+    val host = iosTopViewController() ?: return false
+    return UIApplication.sharedApplication.openURL(url)
+}