Reuse shared channel avatars in direct message conversations

tools/chatgui/src/avatars/avatarmanager.cpp

@@ -118,6 +118,12 @@ QMap<quint64, QString> AvatarManager::servers() const {
 }
 
 QImage AvatarManager::image(const QString& channel, quint64 owner) {
+    if (!channel.toULongLong()) {
+        quint64 selected = 0;
+        for (const auto& ref : m_refs) if (ref.owner == owner && ref.server && !ref.hash.isEmpty() && (!selected || ref.group < selected))
+            selected = ref.group;
+        return selected ? image(QString::number(selected), owner) : QImage();
+    }
     const QString context = key(channel.toULongLong(), owner); const Ref ref = m_refs.value(context);
     if (!m_ready || !ref.server || ref.hash.isEmpty()) return {};
     m_wanted.insert(context);