Finish PM composer cleanup and skip history requests after shutdown

tools/chatgui/src/inputbar.cpp

@@ -495,6 +495,8 @@ void InputBar::forgetDmHistory(const QString& target, quint64 generation) {
         m_pttActive = false;
         if (m_recorder && m_recorder->isRecording()) m_recorder->stopRecording();
         m_recordTarget.clear(); m_recordReply.clear(); m_recordDmGeneration = 0;
+        m_pttBtn->setStyleSheet("QPushButton { border: none; border-radius: 4px; background: transparent; }"
+                               "QPushButton:hover { background: palette(light); }");
     }
     if (m_channelIdForRecord == target && m_dmGeneration == generation) {
         ++m_attachmentContext; clearPendingAttachment(); clearReply(); m_input->clear();

tools/chatgui/src/messagelist.cpp

@@ -1493,6 +1493,9 @@ QString MessageList::dmConvId(const QString& channelId) {
 
 void MessageList::requestDmMessages(const QString& channelId) {
     if (!m_currentDmGeneration || m_dmDeleting.value(dmConvId(channelId)) == m_currentDmGeneration) return;
+    if (!gui_bridge_get_inst() || !gui_bridge_is_uasync_ready()) {
+        GUI_WARN("PM history request skipped: core unavailable target=%s", qPrintable(channelId)); return;
+    }
     QString conv = dmConvId(channelId);
     struct dm_messages_req* req = (struct dm_messages_req*)u_malloc(sizeof(*req));
     if (!req) return;