refactor: Restructure project into sources/tests layout and dissolve PluginLLMCore

sources/settings/ConfigurationManager.hpp

@@ -0,0 +1,66 @@
+// Copyright (C) 2024-2026 Petr Mironychev
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Additional attribution terms under GPLv3 §7(b) apply — see LICENSE
+
+#pragma once
+
+#include <QObject>
+#include <QString>
+#include <QVector>
+
+namespace QodeAssist::Settings {
+
+enum class ConfigurationType { CodeCompletion, Chat, QuickRefactor };
+
+inline constexpr int CONFIGURATION_FORMAT_VERSION = 1;
+
+struct AIConfiguration
+{
+    QString id;
+    QString name;
+    QString provider;
+    QString model;
+    QString templateName;
+    QString url;
+    // Empty = use the template's endpoint; non-empty = override path.
+    QString customEndpoint;
+    ConfigurationType type;
+    int formatVersion = CONFIGURATION_FORMAT_VERSION;
+    bool isPredefined = false;
+};
+
+class ConfigurationManager : public QObject
+{
+    Q_OBJECT
+
+public:
+    static ConfigurationManager &instance();
+
+    bool loadConfigurations(ConfigurationType type);
+    bool saveConfiguration(const AIConfiguration &config);
+    bool deleteConfiguration(const QString &id, ConfigurationType type);
+
+    QVector<AIConfiguration> configurations(ConfigurationType type) const;
+    AIConfiguration getConfigurationById(const QString &id, ConfigurationType type) const;
+
+    QString getConfigurationDirectory(ConfigurationType type) const;
+    
+    static QVector<AIConfiguration> getPredefinedConfigurations(ConfigurationType type);
+
+signals:
+    void configurationsChanged(ConfigurationType type);
+
+private:
+    explicit ConfigurationManager(QObject *parent = nullptr);
+    ~ConfigurationManager() override = default;
+
+    bool ensureDirectoryExists(ConfigurationType type) const;
+    QString configurationTypeToString(ConfigurationType type) const;
+
+    QVector<AIConfiguration> m_ccConfigurations;
+    QVector<AIConfiguration> m_caConfigurations;
+    QVector<AIConfiguration> m_qrConfigurations;
+};
+
+} // namespace QodeAssist::Settings
+