feat: Add agents and agents settings

sources/agents/Agent.hpp

@@ -0,0 +1,53 @@
+// Copyright (C) 2024-2026 Petr Mironychev
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <memory>
+
+#include <QFuture>
+#include <QList>
+#include <QObject>
+#include <QString>
+
+#include "AgentConfig.hpp"
+
+namespace QodeAssist {
+
+namespace Providers {
+class Provider;
+}
+namespace Templates {
+class JsonPromptTemplate;
+class PromptTemplate;
+}
+
+class Agent : public QObject
+{
+    Q_OBJECT
+    Q_DISABLE_COPY_MOVE(Agent)
+public:
+    Agent(AgentConfig config, Providers::Provider *providerOwned, QObject *parent = nullptr);
+    ~Agent() override;
+
+    const AgentConfig &config() const noexcept { return m_config; }
+
+    Providers::Provider *provider() noexcept { return m_provider; }
+    const Providers::Provider *provider() const noexcept { return m_provider; }
+
+    Templates::PromptTemplate *promptTemplate() noexcept;
+    const Templates::PromptTemplate *promptTemplate() const noexcept;
+
+    bool isValid() const noexcept { return m_invalidReason.isEmpty(); }
+    QString invalidReason() const { return m_invalidReason; }
+
+    QFuture<QList<QString>> installedModels();
+
+private:
+    AgentConfig m_config;
+    std::unique_ptr<Templates::JsonPromptTemplate> m_promptTemplate; // owned
+    Providers::Provider *m_provider = nullptr;                        // child of this
+    QString m_invalidReason;
+};
+
+} // namespace QodeAssist