feat: add support acp in common chat (#369)

sources/acp/AgentBinding.hpp

@@ -0,0 +1,30 @@
+// 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 <QJsonObject>
+#include <QJsonValue>
+#include <QString>
+
+namespace QodeAssist::Acp {
+
+inline constexpr qsizetype maxAgentBindingIdLength = 256;
+
+struct AgentBinding
+{
+    QString agentId;
+    QString sessionId;
+
+    bool isEmpty() const { return agentId.isEmpty(); }
+
+    QString displayId() const;
+
+    bool operator==(const AgentBinding &other) const = default;
+
+    QJsonObject toJson() const;
+    static AgentBinding fromJson(const QJsonValue &value, QString *error = nullptr);
+};
+
+} // namespace QodeAssist::Acp