feat: Add session layout

sources/Session/ConversationHistory.cpp

@@ -0,0 +1,82 @@
+// Copyright (C) 2024-2026 Petr Mironychev
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#include "ConversationHistory.hpp"
+
+namespace QodeAssist {
+
+ConversationHistory::ConversationHistory(QObject *parent)
+    : QObject(parent)
+{}
+
+ConversationHistory::~ConversationHistory() = default;
+
+void ConversationHistory::append(Message message)
+{
+    m_messages.push_back(std::move(message));
+    emit messageAdded(static_cast<int>(m_messages.size()) - 1);
+}
+
+void ConversationHistory::appendBlockToLast(std::unique_ptr<LLMQore::ContentBlock> block)
+{
+    if (m_messages.empty() || !block)
+        return;
+
+    m_messages.back().appendBlock(std::move(block));
+    emit messageUpdated(static_cast<int>(m_messages.size()) - 1);
+}
+
+void ConversationHistory::appendTextDeltaToLast(const QString &delta)
+{
+    if (m_messages.empty() || delta.isEmpty())
+        return;
+
+    auto &last = m_messages.back();
+    if (auto *text = last.lastBlockOfType<LLMQore::TextContent>()) {
+        text->appendText(delta);
+    } else {
+        last.appendBlock(std::make_unique<LLMQore::TextContent>(delta));
+    }
+    emit messageUpdated(static_cast<int>(m_messages.size()) - 1);
+}
+
+void ConversationHistory::appendThinkingDeltaToLast(const QString &delta, const QString &signature)
+{
+    if (m_messages.empty() || (delta.isEmpty() && signature.isEmpty()))
+        return;
+
+    auto &last = m_messages.back();
+    auto *thinking = last.lastBlockOfType<LLMQore::ThinkingContent>();
+    if (!thinking) {
+        auto fresh = std::make_unique<LLMQore::ThinkingContent>(delta, signature);
+        last.appendBlock(std::move(fresh));
+    } else {
+        if (!delta.isEmpty())
+            thinking->appendThinking(delta);
+        if (!signature.isEmpty())
+            thinking->setSignature(signature);
+    }
+    emit messageUpdated(static_cast<int>(m_messages.size()) - 1);
+}
+
+void ConversationHistory::clear()
+{
+    if (m_messages.empty())
+        return;
+
+    m_messages.clear();
+    emit cleared();
+}
+
+void ConversationHistory::resetTo(int index)
+{
+    if (index < 0)
+        index = 0;
+    if (static_cast<size_t>(index) >= m_messages.size())
+        return;
+
+    m_messages.resize(static_cast<size_t>(index));
+    emit reset();
+}
+
+} // namespace QodeAssist