attachments: preview bar + combined send (Android + desktop)

Android: file picker → pending preview bar (name+size+X) →
         combined send with text; cache copy, save dialog for downloads

Desktop: attach stores pending, preview bar before send,
         combined with text in onSendClicked

C: attachment_sender.c — include filename in msg data for display

tools/chatgui-android/app/src/main/java/com/utun/chat/ui/components/MessageBubble.kt

@@ -25,6 +25,7 @@ import androidx.compose.ui.platform.LocalConfiguration
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.utun.chat.data.Message
@@ -36,7 +37,8 @@ import kotlinx.coroutines.delay
 fun MessageBubble(message: Message, playbackState: ChatViewModel.PlaybackState = ChatViewModel.PlaybackState(),
                    onPlayVoice: (String, Int) -> Unit = { _, _ -> },
                    onSeekVoice: (String, Int, Int) -> Unit = { _, _, _ -> },
-                   onDownloadFile: (Message) -> Unit = {}) {
+                   onDownloadFile: (Message) -> Unit = {},
+                   onOpenFile: (Message) -> Unit = {}) {
     val bgColor = if (message.isOutgoing) Color(0xFF4A90D9) else Color(0xFFE8E8E8)
     val textColor = if (message.isOutgoing) Color.White else Color.Black
     val alignment = if (message.isOutgoing) Arrangement.End else Arrangement.Start
@@ -63,10 +65,8 @@ fun MessageBubble(message: Message, playbackState: ChatViewModel.PlaybackState =
 
             when {
                 isVoice -> VoiceBubble(message, textColor, isActive, playbackState, onPlayVoice, onSeekVoice)
-                isMedia -> FileBubble(message, textColor, onDownloadFile)
+                isMedia -> FileBubble(message, textColor, onDownloadFile, onOpenFile)
                 else -> {
-                    Text(message.author, fontSize = 13.sp, fontWeight = FontWeight.Bold, color = textColor.copy(alpha = 0.7f))
-                    Spacer(Modifier.height(2.dp))
                     Text(message.text, fontSize = 17.sp, color = textColor)
                 }
             }
@@ -171,7 +171,8 @@ private fun VoiceBubble(message: Message, textColor: Color, isActive: Boolean,
 }
 
 @Composable
-private fun FileBubble(message: Message, textColor: Color, onDownload: (Message) -> Unit = {}) {
+private fun FileBubble(message: Message, textColor: Color, onDownload: (Message) -> Unit = {},
+                       onOpen: (Message) -> Unit = {}) {
     val state = message.downloadState
     val stateIcon = when {
         state == "downloaded" -> "\u2705"
@@ -179,13 +180,18 @@ private fun FileBubble(message: Message, textColor: Color, onDownload: (Message)
         else -> "\u2B07\uFE0F"
     }
     val stateText = when {
-        state == "downloaded" -> "Downloaded"
+        state == "downloaded" -> "Tap to save"
         state == "downloading" -> "Downloading..."
         else -> "Tap to download"
     }
 
     Column(
-        modifier = Modifier.clickable { if (state.isEmpty()) onDownload(message) }
+        modifier = Modifier.clickable {
+            when {
+                state == "downloaded" -> onOpen(message)
+                state.isEmpty() -> onDownload(message)
+            }
+        }
     ) {
         Row(verticalAlignment = Alignment.CenterVertically) {
             Text(stateIcon, fontSize = 18.sp)
@@ -235,6 +241,9 @@ fun InputBar(
     onVoiceSend: () -> Unit = {},
     onVoiceCancel: () -> Unit = {},
     onAttachClicked: () -> Unit = {},
+    pendingAttachmentName: String = "",
+    pendingAttachmentSize: Long = 0L,
+    onClearAttachment: () -> Unit = {},
     modifier: Modifier = Modifier
 ) {
     val ctx = LocalContext.current
@@ -251,15 +260,51 @@ fun InputBar(
         hasMicPerm = granted
     }
 
-    val filePicker = rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { _ -> }
+    val hasAttachment = pendingAttachmentName.isNotEmpty()
 
+    Column(modifier = modifier.fillMaxWidth().padding(8.dp)) {
+        /* Attachment preview bar */
+        if (hasAttachment) {
+            Surface(
+                modifier = Modifier.fillMaxWidth().height(36.dp).padding(bottom = 4.dp),
+                shape = RoundedCornerShape(8.dp),
+                color = MaterialTheme.colorScheme.primaryContainer
+            ) {
                 Row(
-        modifier = modifier.fillMaxWidth().padding(8.dp),
+                    modifier = Modifier.fillMaxSize().padding(horizontal = 8.dp),
                     verticalAlignment = Alignment.CenterVertically
                 ) {
+                    Text("\uD83D\uDCCE", fontSize = 14.sp)
+                    Spacer(Modifier.width(6.dp))
+                    Text(
+                        pendingAttachmentName,
+                        fontSize = 14.sp,
+                        maxLines = 1,
+                        overflow = TextOverflow.Ellipsis,
+                        modifier = Modifier.weight(1f)
+                    )
+                    if (pendingAttachmentSize > 0) {
+                        Text(
+                            formatFileSize(pendingAttachmentSize),
+                            fontSize = 12.sp,
+                            color = MaterialTheme.colorScheme.onPrimaryContainer.copy(alpha = 0.6f)
+                        )
+                        Spacer(Modifier.width(8.dp))
+                    }
+                    IconButton(
+                        onClick = onClearAttachment,
+                        modifier = Modifier.size(24.dp)
+                    ) {
+                        Text("\u2715", fontSize = 14.sp)
+                    }
+                }
+            }
+        }
+
+        Row(modifier = Modifier.fillMaxWidth(), verticalAlignment = Alignment.CenterVertically) {
             /* Attach button */
             if (!isRecording) {
-            IconButton(onClick = { filePicker.launch("*/*") }, enabled = enabled) {
+                IconButton(onClick = onAttachClicked, enabled = enabled) {
                     Text("\uD83D\uDCCE", fontSize = 20.sp)
                 }
             } else {
@@ -314,7 +359,7 @@ fun InputBar(
                 IconButton(onClick = onVoiceSend) {
                     Text("\u25B6", fontSize = 20.sp, color = Color(0xFF4CAF50))
                 }
-        } else if (!isRecording && text.isNotBlank()) {
+            } else if (!isRecording && (text.isNotBlank() || hasAttachment)) {
                 /* Send button — round, primary color */
                 val sendColor = MaterialTheme.colorScheme.primary
                 Box(
@@ -375,6 +420,7 @@ fun InputBar(
             }
         }
     }
+}
 
 private fun formatDuration(ms: Int): String {
     val secs = ms / 1000

tools/chatgui-android/app/src/main/java/com/utun/chat/ui/screens/ChatScreen.kt

@@ -1,5 +1,10 @@
 package com.utun.chat.ui.screens
 
+import android.content.ContentResolver
+import android.net.Uri
+import android.provider.OpenableColumns
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
@@ -10,6 +15,7 @@ import androidx.compose.material.icons.filled.People
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
 import com.utun.chat.data.Channel
 import com.utun.chat.data.Message
@@ -17,7 +23,10 @@ import com.utun.chat.data.NativeLib
 import com.utun.chat.ui.components.InputBar
 import com.utun.chat.ui.components.MessageBubble
 import com.utun.chat.viewmodel.ChatViewModel
+import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.delay
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -36,6 +45,47 @@ fun ChatScreen(
     val isRecordingLocked by viewModel.isRecordingLocked.collectAsState()
     val recordingDurationMs by viewModel.recordingDurationMs.collectAsState()
     var recordingLevel by remember { mutableStateOf(0f) }
+    val context = LocalContext.current
+    val scope = rememberCoroutineScope()
+
+    /* pending attachment state */
+    var pendingAttachUri by remember { mutableStateOf<Uri?>(null) }
+    var pendingAttachName by remember { mutableStateOf("") }
+    var pendingAttachSize by remember { mutableStateOf(0L) }
+
+    /* file picker */
+    val filePickerLauncher = rememberLauncherForActivityResult(ActivityResultContracts.GetContent()) { uri ->
+        if (uri != null) {
+            val cr: ContentResolver = context.contentResolver
+            var name = "file"
+            var size = 0L
+            cr.query(uri, null, null, null, null)?.use { cursor ->
+                if (cursor.moveToFirst()) {
+                    val nameIdx = cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME)
+                    val sizeIdx = cursor.getColumnIndex(OpenableColumns.SIZE)
+                    if (nameIdx >= 0) name = cursor.getString(nameIdx) ?: name
+                    if (sizeIdx >= 0) size = cursor.getLong(sizeIdx)
+                }
+            }
+            pendingAttachUri = uri
+            pendingAttachName = name
+            pendingAttachSize = size
+        }
+    }
+
+    /* save dialog for downloaded files */
+    var pendingSaveFilePath by remember { mutableStateOf<String?>(null) }
+    val saveFileLauncher = rememberLauncherForActivityResult(ActivityResultContracts.CreateDocument("*/*")) { saveUri ->
+        if (saveUri != null) {
+            val filePath = pendingSaveFilePath
+            pendingSaveFilePath = null
+            if (filePath != null) {
+                scope.launch(Dispatchers.IO) {
+                    viewModel.saveDownloadedFile(filePath, saveUri)
+                }
+            }
+        }
+    }
 
     /* Poll peak level during recording */
     LaunchedEffect(isRecording) {
@@ -73,7 +123,13 @@ fun ChatScreen(
                 MessageBubble(messages[idx], playbackState = playbackState,
                     onPlayVoice = { path, durMs -> viewModel.playVoiceMessage(path, durMs) },
                     onSeekVoice = { path, seekMs, durMs -> viewModel.seekVoice(path, seekMs, durMs) },
-                    onDownloadFile = { msg -> viewModel.downloadAttachment(msg) })
+                    onDownloadFile = { msg -> viewModel.downloadAttachment(msg) },
+                    onOpenFile = { msg ->
+                        if (msg.filePath.isNotEmpty()) {
+                            pendingSaveFilePath = msg.filePath
+                            saveFileLauncher.launch(msg.text) /* suggest original filename */
+                        }
+                    })
             }
             item { Spacer(Modifier.height(8.dp)) }
         }
@@ -81,8 +137,23 @@ fun ChatScreen(
             text = text,
             onTextChange = { text = it },
             onSend = {
+                val attachUri = pendingAttachUri
+                val attachName = pendingAttachName
+                pendingAttachUri = null
+                pendingAttachName = ""
+                pendingAttachSize = 0L
+                if (attachUri != null) {
+                    scope.launch(Dispatchers.IO) {
+                        val cachePath = viewModel.copyUriToCache(context, attachUri, attachName)
+                        if (cachePath != null) {
+                            viewModel.sendAttachment(cachePath)
+                        }
+                    }
+                }
+                if (text.isNotBlank()) {
                     onSendMessage(text)
                     text = ""
+                }
             },
             enabled = true,
             isRecording = isRecording,
@@ -99,7 +170,14 @@ fun ChatScreen(
                 viewModel.cancelVoiceRecording()
                 recordingLevel = 0f
             },
-            onAttachClicked = {},
+            onAttachClicked = { filePickerLauncher.launch("*/*") },
+            pendingAttachmentName = pendingAttachName,
+            pendingAttachmentSize = pendingAttachSize,
+            onClearAttachment = {
+                pendingAttachUri = null
+                pendingAttachName = ""
+                pendingAttachSize = 0L
+            },
             modifier = Modifier.navigationBarsPadding()
         )
     }

tools/chatgui-android/app/src/main/java/com/utun/chat/viewmodel/ChatViewModel.kt

@@ -1,5 +1,8 @@
 package com.utun.chat.viewmodel
 
+import android.content.Context
+import android.net.Uri
+import android.util.Log
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
 import androidx.lifecycle.viewModelScope
@@ -12,6 +15,8 @@ import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
+import java.io.File
+import java.io.FileOutputStream
 
 class ChatViewModel : ViewModel() {
 
@@ -443,6 +448,39 @@ class ChatViewModel : ViewModel() {
             })
     }
 
+    fun copyUriToCache(context: Context, uri: Uri, fileName: String): String? {
+        try {
+            val cacheDir = File(context.cacheDir, "attachments")
+            cacheDir.mkdirs()
+            val cacheFile = File(cacheDir, fileName)
+            context.contentResolver.openInputStream(uri)?.use { input ->
+                FileOutputStream(cacheFile).use { output -> input.copyTo(output) }
+            } ?: return null
+            LogManager.addLog("INFO", "VM", "copied attachment to cache: ${cacheFile.absolutePath}")
+            return cacheFile.absolutePath
+        } catch (e: Exception) {
+            LogManager.addLog("ERROR", "VM", "copyUriToCache failed: ${e.message}")
+            return null
+        }
+    }
+
+    fun saveDownloadedFile(srcPath: String, saveUri: Uri) {
+        try {
+            val src = File(srcPath)
+            if (!src.exists()) {
+                LogManager.addLog("ERROR", "VM", "saveDownloadedFile: src not found $srcPath")
+                return
+            }
+            val ctx = ChatApplication.instance
+            ctx.contentResolver.openOutputStream(saveUri)?.use { output ->
+                src.inputStream().use { input -> input.copyTo(output) }
+            }
+            LogManager.addLog("INFO", "VM", "file saved: $srcPath -> $saveUri")
+        } catch (e: Exception) {
+            LogManager.addLog("ERROR", "VM", "saveDownloadedFile failed: ${e.message}")
+        }
+    }
+
     fun clearState() {
         repo?.close()
         repo = null

tools/chatgui-android/jni_bridge/android_jni_bridge.c

@@ -616,10 +616,9 @@ char* utun_bridge_get_member_detail_json(const char* channel_id, uint64_t node_i
                 if (family == 4)
                     snprintf(addr_str, sizeof(addr_str), "%d.%d.%d.%d", addr[0], addr[1], addr[2], addr[3]);
                 else if (family == 6) {
-                    const uint16_t* a = (const uint16_t*)addr;
+                    char tmp[INET6_ADDRSTRLEN];
-                    snprintf(addr_str, sizeof(addr_str), "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
+                    inet_ntop(AF_INET6, addr, tmp, sizeof(tmp));
-                        ntohs(a[0]), ntohs(a[1]), ntohs(a[2]), ntohs(a[3]),
+                    snprintf(addr_str, sizeof(addr_str), "%s", tmp);
-                        ntohs(a[4]), ntohs(a[5]), ntohs(a[6]), ntohs(a[7]));
                 }
             }
             const char* pn;

tools/chatgui-android/libutun_lite/attachment_sender.c

@@ -21,14 +21,19 @@ int attachment_send(const char* channel_id, const char* src_file_path, const cha
     struct UASYNC* ua = instance_lite_get_uasync();
     if (!ua) { DEBUG_ERROR(DEBUG_CATEGORY_GENERAL, "attachment_send: no uasync"); return -1; }
 
-    /* extract basename and ext */
+    /* get original basename for display, then make unique filename for storage */
     char path_copy[1024];
     snprintf(path_copy, sizeof(path_copy), "%s", src_file_path);
     char* fname = basename(path_copy);
+    char original_basename[256];
+    snprintf(original_basename, sizeof(original_basename), "%s", fname);
     char* dot = strrchr(fname, '.');
     char ext[32] = "";
     if (dot) { snprintf(ext, sizeof(ext), "%s", dot + 1); *dot = '\0'; }
 
+    struct stat st; memset(&st, 0, sizeof(st));
+    stat(src_file_path, &st);
+
     /* generate dt/suffix for unique filename */
     time_t t = time(NULL);
     struct tm tm_buf; localtime_r(&t, &tm_buf);
@@ -55,8 +60,10 @@ int attachment_send(const char* channel_id, const char* src_file_path, const cha
     snprintf(media_file, sizeof(media_file), "%s/%s_%s_%s.%s",
              media_dir, dt, fname, suffix, ext[0] ? ext : "bin");
 
-    /* post chat_msg_submit — media_copy=1 so media_index copies src to dest */
+    /* post chat_msg_submit — media_copy=1 so media_index copies src to dest
-    struct chat_msg_submit* req = u_calloc(1, sizeof(struct chat_msg_submit) + 1);
+       data = original_basename — becomes first part of message "d" field: "name.ext|size|..." */
+    size_t datalen = strlen(original_basename);
+    struct chat_msg_submit* req = u_calloc(1, sizeof(struct chat_msg_submit) + datalen + 1);
     if (!req) return -1;
 
     snprintf(req->channel_id, sizeof(req->channel_id), "%s", channel_id);
@@ -65,11 +72,12 @@ int attachment_send(const char* channel_id, const char* src_file_path, const cha
     snprintf(req->media_dest, sizeof(req->media_dest), "%s", media_file);
     req->media_copy = 1;
     req->data = (uint8_t*)(req + 1);
-    req->data_len = 0;
+    memcpy(req->data, original_basename, datalen);
+    req->data_len = (uint32_t)datalen;
     req->timestamp = 0;
 
-    DEBUG_INFO(DEBUG_CATEGORY_GENERAL, "attachment_send: ch=%s src=%s dst=%s",
+    DEBUG_INFO(DEBUG_CATEGORY_GENERAL, "attachment_send: ch=%s src=%s dst=%s name=%s size=%lld",
-               channel_id, src_file_path, media_file);
+               channel_id, src_file_path, media_file, original_basename, (long long)st.st_size);
 
     uasync_post(ua, chat_core_submit_trampoline, req);
     return 0;

tools/chatgui/src/inputbar.cpp

@@ -45,6 +45,16 @@ static QWidget *wrapBottomBtn(QPushButton *btn, int pad) {
     return w;
 }
 
+QString InputBar::formatFileSize(qint64 bytes) {
+    if (bytes < 1024) return QString("%1B").arg(bytes);
+    double kb = bytes / 1024.0;
+    if (kb < 1024.0) return QString("%1KB").arg(kb, 0, 'f', kb < 10.0 ? 1 : 0);
+    double mb = kb / 1024.0;
+    if (mb < 1024.0) return QString("%1MB").arg(mb, 0, 'f', mb < 10.0 ? 1 : 0);
+    double gb = mb / 1024.0;
+    return QString("%1GB").arg(gb, 0, 'f', 1);
+}
+
 InputBar::InputBar(EmojiPanel *emojiPanel, AudioRecorder *recorder, QWidget *parent)
     : QWidget(parent)
     , m_input(new QTextEdit(this))
@@ -53,8 +63,29 @@ InputBar::InputBar(EmojiPanel *emojiPanel, AudioRecorder *recorder, QWidget *par
     , m_emojiPanel(emojiPanel)
     , m_recorder(recorder)
 {
-    auto *layout = new QHBoxLayout(this);
+    auto *mainLayout = new QVBoxLayout(this);
-    layout->setContentsMargins(8, 4, 8, 4);
+    mainLayout->setContentsMargins(8, 4, 8, 0);
+    mainLayout->setSpacing(2);
+
+    /* Attachment preview bar (hidden until file selected) */
+    m_attachPreview = new QWidget(this);
+    auto *prevLay = new QHBoxLayout(m_attachPreview);
+    prevLay->setContentsMargins(0, 2, 0, 2);
+    prevLay->setSpacing(4);
+    m_attachPreviewLabel = new QLabel(m_attachPreview);
+    m_attachPreviewLabel->setStyleSheet("background: palette(light); border-radius: 6px; padding: 2px 8px;");
+    prevLay->addWidget(m_attachPreviewLabel, 1);
+    m_attachClearBtn = new QPushButton(QString::fromUtf8("\xE2\x9C\x95"), m_attachPreview);
+    m_attachClearBtn->setFixedSize(20, 20);
+    m_attachClearBtn->setCursor(Qt::PointingHandCursor);
+    m_attachClearBtn->setStyleSheet("QPushButton { border: none; background: transparent; color: palette(text); }"
+                                     "QPushButton:hover { color: #e74c3c; }");
+    connect(m_attachClearBtn, &QPushButton::clicked, this, &InputBar::clearPendingAttachment);
+    prevLay->addWidget(m_attachClearBtn);
+    m_attachPreview->hide();
+    mainLayout->addWidget(m_attachPreview);
+
+    auto *layout = new QHBoxLayout();
     layout->setSpacing(4);
 
     m_attachBtn = makeIconBtn(QIcon(":/icons/attach.png"),
@@ -144,6 +175,8 @@ InputBar::InputBar(EmojiPanel *emojiPanel, AudioRecorder *recorder, QWidget *par
         connect(recorder, &AudioRecorder::recordingStopped, this, [this](int) { hideRecordOverlay(); });
         connect(recorder, &AudioRecorder::durationChanged, this, &InputBar::updateRecordingUI);
     }
+
+    mainLayout->addLayout(layout);
 }
 
 bool InputBar::eventFilter(QObject *obj, QEvent *event) {
@@ -185,16 +218,30 @@ void InputBar::adjustInputHeight() {
 
 void InputBar::onSendClicked() {
     QString text = m_input->toPlainText();
-    GUI_INFO("send: len=%d hasLF=%d text='%s'",
-             text.length(), text.contains('\n'), qPrintable(text));
     while (!text.isEmpty() && (text.back() == ' ' || text.back() == '\t'))
         text.chop(1);
-    if (text.isEmpty()) return;
+
+    bool hasAttach = !m_pendingAttachSrc.isEmpty();
+    if (!hasAttach && text.isEmpty()) return;
+
+    if (hasAttach) {
+        GUI_INFO("send: file=%s name=%s", qPrintable(m_pendingAttachSrc), qPrintable(m_pendingAttachName));
+        emit sendFileAttachment(m_pendingAttachSrc, m_pendingAttachDest, m_pendingAttachName);
+        m_pendingAttachSrc.clear();
+        m_pendingAttachDest.clear();
+        m_pendingAttachName.clear();
+        m_pendingAttachSize = 0;
+        m_attachPreview->hide();
+    }
+    if (!text.isEmpty()) {
+        GUI_INFO("send: len=%d hasLF=%d text='%s'",
+                 text.length(), text.contains('\n'), qPrintable(text));
         emit sendMessage(text);
         m_input->clear();
         if (m_emojiPanel) m_emojiPanel->hide();
         m_input->setFocus();
     }
+}
 
 void InputBar::setRecordingContext(const QString& mediaDirBase, const QString& channelId) {
     m_mediaDirBase = mediaDirBase;
@@ -284,9 +331,26 @@ void InputBar::onAttachClicked() {
     QString destPath = QString("%1/%2_%3_%4.%5")
         .arg(mediaPath, ts).arg(fi.completeBaseName()).arg(rnd, 4, 16, QChar('0')).arg(fi.suffix().isEmpty() ? "bin" : fi.suffix());
 
-    GUI_INFO("InputBar::onAttachClicked: src=%s dest=%s",
+    m_pendingAttachSrc  = srcPath;
-             qPrintable(srcPath), qPrintable(destPath));
+    m_pendingAttachDest = destPath;
-    emit sendFileAttachment(srcPath, destPath, fi.fileName());
+    m_pendingAttachName = fi.fileName();
+    m_pendingAttachSize = fi.size();
+
+    QString labelText = QString::fromUtf8("\xF0\x9F\x93\x8E %1 (%2)")
+        .arg(fi.fileName(), formatFileSize(fi.size()));
+    m_attachPreviewLabel->setText(labelText);
+    m_attachPreview->show();
+
+    GUI_INFO("InputBar::onAttachClicked: pending %s size=%lld",
+             qPrintable(srcPath), (long long)fi.size());
+}
+
+void InputBar::clearPendingAttachment() {
+    m_pendingAttachSrc.clear();
+    m_pendingAttachDest.clear();
+    m_pendingAttachName.clear();
+    m_pendingAttachSize = 0;
+    m_attachPreview->hide();
 }
 
 void InputBar::resizeEvent(QResizeEvent* event) {

tools/chatgui/src/inputbar.h

@@ -34,11 +34,14 @@ private slots:
     void onPttPressed();
     void onPttReleased();
     void onAttachClicked();
+    void clearPendingAttachment();
     void updateRecordingUI(int ms);
     void showRecordOverlay();
     void hideRecordOverlay();
 
 private:
+    static QString formatFileSize(qint64 bytes);
+
     QTextEdit    *m_input;
     QPushButton  *m_emojiBtn;
     QPushButton  *m_pttBtn;
@@ -49,8 +52,15 @@ private:
     QLabel       *m_recordLabel = nullptr;
     QPushButton  *m_cancelRecBtn = nullptr;
     QProgressBar *m_levelBar = nullptr;
+    QWidget      *m_attachPreview = nullptr;
+    QLabel       *m_attachPreviewLabel = nullptr;
+    QPushButton  *m_attachClearBtn = nullptr;
     bool m_pttActive = false;
     QString m_voiceFilePath;
     QString m_mediaDirBase;
     QString m_channelIdForRecord;
+    QString m_pendingAttachSrc;
+    QString m_pendingAttachDest;
+    QString m_pendingAttachName;
+    qint64 m_pendingAttachSize = 0;
 };