refactor: Decoupling chat architecture (#367)

* refactor: Migrate tests to Qt Creator plugin framework and update llmqore transports

* refactor: Move conversation history into IDE-free session library

* refactor: Extract turn context assembly behind injected ports

* build: Add RunQodeAssistTests target for the plugin test suite

* refactor: Route the chat through a Session and ChatBackend seam

sources/ChatView/TurnContextAdapters.hpp

@@ -0,0 +1,64 @@
+// Copyright (C) 2026 Petr Mironychev
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Additional attribution terms under GPLv3 §7(b) apply — see LICENSE
+
+#pragma once
+
+#include <memory>
+
+#include "session/TurnContextPorts.hpp"
+
+namespace ProjectExplorer {
+class Project;
+}
+
+namespace QodeAssist::Context {
+class ContextManager;
+}
+
+namespace QodeAssist::Skills {
+class SkillsManager;
+}
+
+namespace QodeAssist::Chat {
+
+class ProjectContextQtCreator : public Session::IProjectContextPort
+{
+public:
+    explicit ProjectContextQtCreator(ProjectExplorer::Project *project);
+
+    Session::ProjectInfo projectInfo() const override;
+    QString projectRules() const override;
+
+private:
+    ProjectExplorer::Project *m_project = nullptr;
+};
+
+class SkillsContextQtCreator : public Session::ISkillsContextPort
+{
+public:
+    SkillsContextQtCreator(Skills::SkillsManager *skillsManager, ProjectExplorer::Project *project);
+
+    QString alwaysOnBodies() const override;
+    QString catalogText() const override;
+    std::optional<Session::InvokedSkill> findSkill(const QString &name) const override;
+
+private:
+    Skills::SkillsManager *m_skillsManager = nullptr;
+};
+
+class LinkedFilesQtCreator : public Session::ILinkedFilesPort
+{
+public:
+    explicit LinkedFilesQtCreator(Context::ContextManager *contextManager);
+
+    QList<Session::LinkedFile> readFiles(const QList<QString> &paths) const override;
+
+private:
+    Context::ContextManager *m_contextManager = nullptr;
+};
+
+std::unique_ptr<SkillsContextQtCreator> makeSkillsContext(
+    Skills::SkillsManager *skillsManager, ProjectExplorer::Project *project);
+
+} // namespace QodeAssist::Chat